From e5ecbaea6adaf98e365365f457bd60bcdf16062e Mon Sep 17 00:00:00 2001
From: Siddhant Goel <me@sgoel.dev>
Date: Sun, 21 Apr 2024 17:45:17 +0200
Subject: [PATCH] chore: remove unused error codes

---
 streaming_form_data/_parser.c   | 3589 ++++++++++++++++---------------
 streaming_form_data/_parser.pyx |  124 +-
 streaming_form_data/parser.py   |   14 +-
 3 files changed, 1886 insertions(+), 1841 deletions(-)

diff --git a/streaming_form_data/_parser.c b/streaming_form_data/_parser.c
index ed2ca24a..84f649fc 100644
--- a/streaming_form_data/_parser.c
+++ b/streaming_form_data/_parser.c
@@ -1486,21 +1486,7 @@ enum __pyx_t_19streaming_form_data_7_parser_FinderState {
   __pyx_e_19streaming_form_data_7_parser_FS_END
 };
 
-/* "streaming_form_data/_parser.pyx":28
- * # 300..399: problems with parsing particular part headers
- * # 400..499: problems with unregistered parts
- * cpdef enum ErrorGroup:             # <<<<<<<<<<<<<<
- *     Internal = 100
- *     Delimiting = 200
- */
-enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup {
-  __pyx_e_19streaming_form_data_7_parser_Internal = 0x64,
-  __pyx_e_19streaming_form_data_7_parser_Delimiting = 0xC8,
-  __pyx_e_19streaming_form_data_7_parser_PartHeaders = 0x12C,
-  __pyx_e_19streaming_form_data_7_parser_UnexpectedPart = 0x190
-};
-
-/* "streaming_form_data/_parser.pyx":162
+/* "streaming_form_data/_parser.pyx":24
  * 
  * 
  * cdef enum ParserState:             # <<<<<<<<<<<<<<
@@ -1522,7 +1508,21 @@ enum __pyx_t_19streaming_form_data_7_parser_ParserState {
   __pyx_e_19streaming_form_data_7_parser_PS_ERROR
 };
 
-/* "streaming_form_data/_parser.pyx":35
+/* "streaming_form_data/_parser.pyx":44
+ * 
+ * 
+ * cpdef enum ErrorCode:             # <<<<<<<<<<<<<<
+ *     """
+ *     Errors that can be reported to the user
+ */
+enum __pyx_t_19streaming_form_data_7_parser_ErrorCode {
+  __pyx_e_19streaming_form_data_7_parser_E_INTERNAL,
+  __pyx_e_19streaming_form_data_7_parser_E_DELIMITING,
+  __pyx_e_19streaming_form_data_7_parser_E_PART_HEADERS,
+  __pyx_e_19streaming_form_data_7_parser_E_UNEXPECTED_PART
+};
+
+/* "streaming_form_data/_parser.pyx":62
  * 
  * 
  * cdef class Finder:             # <<<<<<<<<<<<<<
@@ -1540,7 +1540,7 @@ struct __pyx_obj_19streaming_form_data_7_parser_Finder {
 };
 
 
-/* "streaming_form_data/_parser.pyx":92
+/* "streaming_form_data/_parser.pyx":119
  * 
  * 
  * cdef class Part:             # <<<<<<<<<<<<<<
@@ -1554,7 +1554,7 @@ struct __pyx_obj_19streaming_form_data_7_parser_Part {
 };
 
 
-/* "streaming_form_data/_parser.pyx":127
+/* "streaming_form_data/_parser.pyx":154
  * 
  * 
  * cdef class AsyncPart:             # <<<<<<<<<<<<<<
@@ -1568,17 +1568,18 @@ struct __pyx_obj_19streaming_form_data_7_parser_AsyncPart {
 };
 
 
-/* "streaming_form_data/_parser.pyx":182
+/* "streaming_form_data/_parser.pyx":189
  * 
  * 
  * cdef class _Parser:             # <<<<<<<<<<<<<<
  *     cdef ParserState state
- * 
+ *     cdef ErrorCode error_code
  */
 struct __pyx_obj_19streaming_form_data_7_parser__Parser {
   PyObject_HEAD
   struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *__pyx_vtab;
   enum __pyx_t_19streaming_form_data_7_parser_ParserState state;
+  enum __pyx_t_19streaming_form_data_7_parser_ErrorCode error_code;
   struct __pyx_obj_19streaming_form_data_7_parser_Finder *delimiter_finder;
   struct __pyx_obj_19streaming_form_data_7_parser_Finder *ender_finder;
   size_t delimiter_length;
@@ -1592,7 +1593,7 @@ struct __pyx_obj_19streaming_form_data_7_parser__Parser {
 };
 
 
-/* "streaming_form_data/_parser.pyx":149
+/* "streaming_form_data/_parser.pyx":176
  *             target.multipart_content_type = value
  * 
  *     async def start(self):             # <<<<<<<<<<<<<<
@@ -1608,7 +1609,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct__start {
 };
 
 
-/* "streaming_form_data/_parser.pyx":153
+/* "streaming_form_data/_parser.pyx":180
  *             await target.start()
  * 
  *     async def data_received(self, bytes chunk):             # <<<<<<<<<<<<<<
@@ -1625,7 +1626,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct_1_data_receiv
 };
 
 
-/* "streaming_form_data/_parser.pyx":157
+/* "streaming_form_data/_parser.pyx":184
  *             await target.data_received(chunk)
  * 
  *     async def finish(self):             # <<<<<<<<<<<<<<
@@ -1641,7 +1642,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct_2_finish {
 };
 
 
-/* "streaming_form_data/_parser.pyx":229
+/* "streaming_form_data/_parser.pyx":237
  *         self.active_part.start()
  * 
  *     async def async_set_active_part(self, part, str filename):             # <<<<<<<<<<<<<<
@@ -1656,7 +1657,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct_3_async_set_a
 };
 
 
-/* "streaming_form_data/_parser.pyx":239
+/* "streaming_form_data/_parser.pyx":247
  *         self.active_part = None
  * 
  *     async def async_unset_active_part(self):             # <<<<<<<<<<<<<<
@@ -1669,7 +1670,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct_4_async_unset
 };
 
 
-/* "streaming_form_data/_parser.pyx":248
+/* "streaming_form_data/_parser.pyx":256
  *             self.active_part.data_received(value)
  * 
  *     async def async_on_body(self, bytes value):             # <<<<<<<<<<<<<<
@@ -1683,7 +1684,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct_5_async_on_bo
 };
 
 
-/* "streaming_form_data/_parser.pyx":268
+/* "streaming_form_data/_parser.pyx":276
  *         return self._parse(chunk, index)
  * 
  *     async def async_data_received(self, bytes data):             # <<<<<<<<<<<<<<
@@ -1712,7 +1713,7 @@ struct __pyx_obj___Pyx_EnumMeta {
 
 
 
-/* "streaming_form_data/_parser.pyx":35
+/* "streaming_form_data/_parser.pyx":62
  * 
  * 
  * cdef class Finder:             # <<<<<<<<<<<<<<
@@ -1731,19 +1732,19 @@ struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder {
 static struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *__pyx_vtabptr_19streaming_form_data_7_parser_Finder;
 
 
-/* "streaming_form_data/_parser.pyx":182
+/* "streaming_form_data/_parser.pyx":189
  * 
  * 
  * cdef class _Parser:             # <<<<<<<<<<<<<<
  *     cdef ParserState state
- * 
+ *     cdef ErrorCode error_code
  */
 
 struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser {
   PyObject *(*_part_for)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *, PyObject *);
   PyObject *(*include_leftover_buffer)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *, PyObject *);
   size_t (*rewind_fast_forward)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *, __pyx_t_19streaming_form_data_7_parser_Byte const *, size_t, size_t);
-  PyObject *(*mark_error)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *);
+  PyObject *(*mark_error)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *, enum __pyx_t_19streaming_form_data_7_parser_ErrorCode);
 };
 static struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *__pyx_vtabptr_19streaming_form_data_7_parser__Parser;
 /* #### Code section: utility_code_proto ### */
@@ -2679,6 +2680,9 @@ static CYTHON_INLINE PyObject* __Pyx_PyInt_From_enum____pyx_t_19streaming_form_d
 /* CIntFromPy.proto */
 static CYTHON_INLINE enum __pyx_t_19streaming_form_data_7_parser_FinderState __Pyx_PyInt_As_enum____pyx_t_19streaming_form_data_7_parser_FinderState(PyObject *);
 
+/* CIntFromPy.proto */
+static CYTHON_INLINE enum __pyx_t_19streaming_form_data_7_parser_ErrorCode __Pyx_PyInt_As_enum____pyx_t_19streaming_form_data_7_parser_ErrorCode(PyObject *);
+
 /* CIntToPy.proto */
 static CYTHON_INLINE PyObject* __Pyx_PyInt_From_enum____pyx_t_19streaming_form_data_7_parser_ParserState(enum __pyx_t_19streaming_form_data_7_parser_ParserState value);
 
@@ -2698,7 +2702,7 @@ static CYTHON_INLINE PyObject* __Pyx_PyInt_From_unsigned_char(unsigned char valu
 static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value);
 
 /* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_enum____pyx_t_19streaming_form_data_7_parser_ErrorGroup(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup value);
+static CYTHON_INLINE PyObject* __Pyx_PyInt_From_enum____pyx_t_19streaming_form_data_7_parser_ErrorCode(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode value);
 
 /* CIntToPy.proto */
 static CYTHON_INLINE PyObject* __Pyx_PyInt_From_int(int value);
@@ -2753,7 +2757,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_6Finder_matched_length(stru
 static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser__part_for(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self, PyObject *__pyx_v_name); /* proto*/
 static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser_include_leftover_buffer(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self, PyObject *__pyx_v_data); /* proto*/
 static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forward(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self, __pyx_t_19streaming_form_data_7_parser_Byte const *__pyx_v_chunk_ptr, size_t __pyx_v_pos_first, size_t __pyx_v_pos_last); /* proto*/
-static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser_mark_error(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self); /* proto*/
+static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser_mark_error(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self, enum __pyx_t_19streaming_form_data_7_parser_ErrorCode __pyx_v_error_code); /* proto*/
 
 /* Module declarations from "streaming_form_data._parser" */
 static int __pyx_v_19streaming_form_data_7_parser_c_hyphen;
@@ -2768,7 +2772,7 @@ static PyObject *__pyx_f_19streaming_form_data_7_parser___pyx_unpickle_Finder__s
 static PyObject *__pyx_f_19streaming_form_data_7_parser___pyx_unpickle_Part__set_state(struct __pyx_obj_19streaming_form_data_7_parser_Part *, PyObject *); /*proto*/
 static PyObject *__pyx_f_19streaming_form_data_7_parser___pyx_unpickle_AsyncPart__set_state(struct __pyx_obj_19streaming_form_data_7_parser_AsyncPart *, PyObject *); /*proto*/
 static PyObject *__pyx_f_19streaming_form_data_7_parser___pyx_unpickle__Parser__set_state(struct __pyx_obj_19streaming_form_data_7_parser__Parser *, PyObject *); /*proto*/
-static PyObject *__Pyx_Enum_54f4e2__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorGroup__etc_to_py(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup); /*proto*/
+static PyObject *__Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode); /*proto*/
 static PyObject *__pyx_unpickle___Pyx_EnumMeta__set_state(struct __pyx_obj___Pyx_EnumMeta *, PyObject *); /*proto*/
 /* #### Code section: typeinfo ### */
 /* #### Code section: before_global_var ### */
@@ -2854,7 +2858,6 @@ static const char __pyx_k_parents[] = "parents";
 static const char __pyx_k_prepare[] = "__prepare__";
 static const char __pyx_k_EnumBase[] = "EnumBase";
 static const char __pyx_k_EnumType[] = "EnumType";
-static const char __pyx_k_Internal[] = "Internal";
 static const char __pyx_k_Parser_2[] = "_Parser";
 static const char __pyx_k_filename[] = "filename";
 static const char __pyx_k_getstate[] = "__getstate__";
@@ -2868,6 +2871,7 @@ static const char __pyx_k_register[] = "register";
 static const char __pyx_k_set_name[] = "__set_name__";
 static const char __pyx_k_setstate[] = "__setstate__";
 static const char __pyx_k_AsyncPart[] = "AsyncPart";
+static const char __pyx_k_ErrorCode[] = "ErrorCode";
 static const char __pyx_k_chunk_len[] = "chunk_len";
 static const char __pyx_k_chunk_ptr[] = "chunk_ptr";
 static const char __pyx_k_delimiter[] = "delimiter";
@@ -2876,8 +2880,7 @@ static const char __pyx_k_isenabled[] = "isenabled";
 static const char __pyx_k_metaclass[] = "__metaclass__";
 static const char __pyx_k_pyx_state[] = "__pyx_state";
 static const char __pyx_k_reduce_ex[] = "__reduce_ex__";
-static const char __pyx_k_Delimiting[] = "Delimiting";
-static const char __pyx_k_ErrorGroup[] = "ErrorGroup";
+static const char __pyx_k_E_INTERNAL[] = "E_INTERNAL";
 static const char __pyx_k_NullTarget[] = "NullTarget";
 static const char __pyx_k_Part_start[] = "Part.start";
 static const char __pyx_k_ValueError[] = "ValueError";
@@ -2887,12 +2890,12 @@ static const char __pyx_k_pyx_vtable[] = "__pyx_vtable__";
 static const char __pyx_k_skip_count[] = "skip_count";
 static const char __pyx_k_Finder_feed[] = "Finder.feed";
 static const char __pyx_k_OrderedDict[] = "OrderedDict";
-static const char __pyx_k_PartHeaders[] = "PartHeaders";
 static const char __pyx_k_Part_finish[] = "Part.finish";
 static const char __pyx_k_PickleError[] = "PickleError";
 static const char __pyx_k_collections[] = "collections";
 static const char __pyx_k_match_start[] = "match_start";
 static const char __pyx_k_mro_entries[] = "__mro_entries__";
+static const char __pyx_k_E_DELIMITING[] = "E_DELIMITING";
 static const char __pyx_k_Finder_found[] = "Finder.found";
 static const char __pyx_k_Pyx_EnumBase[] = "__Pyx_EnumBase";
 static const char __pyx_k_Pyx_FlagBase[] = "__Pyx_FlagBase";
@@ -2912,8 +2915,8 @@ static const char __pyx_k_class_getitem[] = "__class_getitem__";
 static const char __pyx_k_data_received[] = "data_received";
 static const char __pyx_k_init_subclass[] = "__init_subclass__";
 static const char __pyx_k_reduce_cython[] = "__reduce_cython__";
+static const char __pyx_k_E_PART_HEADERS[] = "E_PART_HEADERS";
 static const char __pyx_k_Parser_on_body[] = "_Parser.on_body";
-static const char __pyx_k_UnexpectedPart[] = "UnexpectedPart";
 static const char __pyx_k_matched_length[] = "matched_length";
 static const char __pyx_k_AsyncPart_start[] = "AsyncPart.start";
 static const char __pyx_k_Finder_inactive[] = "Finder.inactive";
@@ -2925,6 +2928,7 @@ static const char __pyx_k_set_active_part[] = "set_active_part";
 static const char __pyx_k_setstate_cython[] = "__setstate_cython__";
 static const char __pyx_k_AsyncPart_finish[] = "AsyncPart.finish";
 static const char __pyx_k_get_content_type[] = "get_content_type";
+static const char __pyx_k_E_UNEXPECTED_PART[] = "E_UNEXPECTED_PART";
 static const char __pyx_k_pyx_unpickle_Part[] = "__pyx_unpickle_Part";
 static const char __pyx_k_unset_active_part[] = "unset_active_part";
 static const char __pyx_k_Part_data_received[] = "Part.data_received";
@@ -2971,6 +2975,7 @@ static const char __pyx_k_streaming_form_data__parser[] = "streaming_form_data._
 static const char __pyx_k_streaming_form_data_targets[] = "streaming_form_data.targets";
 static const char __pyx_k_Parser_async_set_active_part[] = "_Parser.async_set_active_part";
 static const char __pyx_k_Pyx_EnumMeta___reduce_cython[] = "__Pyx_EnumMeta.__reduce_cython__";
+static const char __pyx_k_Errors_that_can_be_reported_to[] = "\n    Errors that can be reported to the user\n    ";
 static const char __pyx_k_Parser_async_unset_active_part[] = "_Parser.async_unset_active_part";
 static const char __pyx_k_Pyx_EnumMeta___setstate_cython[] = "__Pyx_EnumMeta.__setstate_cython__";
 static const char __pyx_k_AsyncPart_set_multipart_content[] = "AsyncPart.set_multipart_content_type";
@@ -2980,7 +2985,7 @@ static const char __pyx_k_AsyncPart_set_multipart_filename[] = "AsyncPart.set_mu
 static const char __pyx_k_Incompatible_checksums_0x_x_vs_0[] = "Incompatible checksums (0x%x vs (0xe3b0c44, 0xda39a3e, 0xd41d8cd) = ())";
 static const char __pyx_k_Incompatible_checksums_0x_x_vs_0_2[] = "Incompatible checksums (0x%x vs (0x0855a7d, 0x0c6065b, 0x0cd0b9a) = (index, state, target, target_len, target_ptr))";
 static const char __pyx_k_Incompatible_checksums_0x_x_vs_0_3[] = "Incompatible checksums (0x%x vs (0x73c2615, 0x0c26682, 0xec97593) = (name, targets))";
-static const char __pyx_k_Incompatible_checksums_0x_x_vs_0_4[] = "Incompatible checksums (0x%x vs (0x428af85, 0xaf18744, 0x7bae3b8) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, expected_parts, state, strict, unexpected_part_name))";
+static const char __pyx_k_Incompatible_checksums_0x_x_vs_0_4[] = "Incompatible checksums (0x%x vs (0x5d4e824, 0xc08542c, 0x017e085) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, error_code, expected_parts, state, strict, unexpected_part_name))";
 /* #### Code section: decls ### */
 static int __pyx_pf_8EnumBase_14__Pyx_EnumMeta___init__(struct __pyx_obj___Pyx_EnumMeta *__pyx_v_cls, PyObject *__pyx_v_name, PyObject *__pyx_v_parents, PyObject *__pyx_v_dct); /* proto */
 static PyObject *__pyx_pf_8EnumBase_14__Pyx_EnumMeta_2__iter__(struct __pyx_obj___Pyx_EnumMeta *__pyx_v_cls); /* proto */
@@ -3122,11 +3127,15 @@ typedef struct {
   PyObject *__pyx_n_s_AsyncPart_set_multipart_content;
   PyObject *__pyx_n_s_AsyncPart_set_multipart_filename;
   PyObject *__pyx_n_s_AsyncPart_start;
-  PyObject *__pyx_n_s_Delimiting;
+  PyObject *__pyx_n_s_E_DELIMITING;
+  PyObject *__pyx_n_s_E_INTERNAL;
+  PyObject *__pyx_n_s_E_PART_HEADERS;
+  PyObject *__pyx_n_s_E_UNEXPECTED_PART;
   PyObject *__pyx_kp_u_Empty_values_not_allowed;
   PyObject *__pyx_n_s_EnumBase;
   PyObject *__pyx_n_s_EnumType;
-  PyObject *__pyx_n_s_ErrorGroup;
+  PyObject *__pyx_n_s_ErrorCode;
+  PyObject *__pyx_kp_s_Errors_that_can_be_reported_to;
   PyObject *__pyx_n_s_Finder;
   PyObject *__pyx_n_s_Finder___reduce_cython;
   PyObject *__pyx_n_s_Finder___setstate_cython;
@@ -3141,7 +3150,6 @@ typedef struct {
   PyObject *__pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4;
   PyObject *__pyx_n_s_IntEnum;
   PyObject *__pyx_n_s_IntFlag;
-  PyObject *__pyx_n_s_Internal;
   PyObject *__pyx_n_s_NullTarget;
   PyObject *__pyx_n_s_OrderedDict;
   PyObject *__pyx_n_s_Parser;
@@ -3159,7 +3167,6 @@ typedef struct {
   PyObject *__pyx_n_s_Parser_set_active_part;
   PyObject *__pyx_n_s_Parser_unset_active_part;
   PyObject *__pyx_n_s_Part;
-  PyObject *__pyx_n_s_PartHeaders;
   PyObject *__pyx_n_s_Part___reduce_cython;
   PyObject *__pyx_n_s_Part___setstate_cython;
   PyObject *__pyx_n_s_Part_add_target;
@@ -3179,7 +3186,6 @@ typedef struct {
   PyObject *__pyx_n_s_Pyx_FlagBase___new;
   PyObject *__pyx_n_s_Pyx_FlagBase___repr;
   PyObject *__pyx_n_s_Pyx_FlagBase___str;
-  PyObject *__pyx_n_s_UnexpectedPart;
   PyObject *__pyx_kp_s_Unknown_enum_value_s;
   PyObject *__pyx_n_s_ValueError;
   PyObject *__pyx_kp_b__12;
@@ -3316,14 +3322,14 @@ typedef struct {
   PyObject *__pyx_n_s_value;
   PyObject *__pyx_n_s_values;
   PyObject *__pyx_int_0;
+  PyObject *__pyx_int_1564805;
   PyObject *__pyx_int_8739453;
   PyObject *__pyx_int_12740226;
   PyObject *__pyx_int_12977755;
   PyObject *__pyx_int_13437850;
-  PyObject *__pyx_int_69775237;
+  PyObject *__pyx_int_97839140;
   PyObject *__pyx_int_121382421;
-  PyObject *__pyx_int_129688504;
-  PyObject *__pyx_int_183600964;
+  PyObject *__pyx_int_201872428;
   PyObject *__pyx_int_222419149;
   PyObject *__pyx_int_228825662;
   PyObject *__pyx_int_238750788;
@@ -3472,11 +3478,15 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_n_s_AsyncPart_set_multipart_content);
   Py_CLEAR(clear_module_state->__pyx_n_s_AsyncPart_set_multipart_filename);
   Py_CLEAR(clear_module_state->__pyx_n_s_AsyncPart_start);
-  Py_CLEAR(clear_module_state->__pyx_n_s_Delimiting);
+  Py_CLEAR(clear_module_state->__pyx_n_s_E_DELIMITING);
+  Py_CLEAR(clear_module_state->__pyx_n_s_E_INTERNAL);
+  Py_CLEAR(clear_module_state->__pyx_n_s_E_PART_HEADERS);
+  Py_CLEAR(clear_module_state->__pyx_n_s_E_UNEXPECTED_PART);
   Py_CLEAR(clear_module_state->__pyx_kp_u_Empty_values_not_allowed);
   Py_CLEAR(clear_module_state->__pyx_n_s_EnumBase);
   Py_CLEAR(clear_module_state->__pyx_n_s_EnumType);
-  Py_CLEAR(clear_module_state->__pyx_n_s_ErrorGroup);
+  Py_CLEAR(clear_module_state->__pyx_n_s_ErrorCode);
+  Py_CLEAR(clear_module_state->__pyx_kp_s_Errors_that_can_be_reported_to);
   Py_CLEAR(clear_module_state->__pyx_n_s_Finder);
   Py_CLEAR(clear_module_state->__pyx_n_s_Finder___reduce_cython);
   Py_CLEAR(clear_module_state->__pyx_n_s_Finder___setstate_cython);
@@ -3491,7 +3501,6 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4);
   Py_CLEAR(clear_module_state->__pyx_n_s_IntEnum);
   Py_CLEAR(clear_module_state->__pyx_n_s_IntFlag);
-  Py_CLEAR(clear_module_state->__pyx_n_s_Internal);
   Py_CLEAR(clear_module_state->__pyx_n_s_NullTarget);
   Py_CLEAR(clear_module_state->__pyx_n_s_OrderedDict);
   Py_CLEAR(clear_module_state->__pyx_n_s_Parser);
@@ -3509,7 +3518,6 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_n_s_Parser_set_active_part);
   Py_CLEAR(clear_module_state->__pyx_n_s_Parser_unset_active_part);
   Py_CLEAR(clear_module_state->__pyx_n_s_Part);
-  Py_CLEAR(clear_module_state->__pyx_n_s_PartHeaders);
   Py_CLEAR(clear_module_state->__pyx_n_s_Part___reduce_cython);
   Py_CLEAR(clear_module_state->__pyx_n_s_Part___setstate_cython);
   Py_CLEAR(clear_module_state->__pyx_n_s_Part_add_target);
@@ -3529,7 +3537,6 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_n_s_Pyx_FlagBase___new);
   Py_CLEAR(clear_module_state->__pyx_n_s_Pyx_FlagBase___repr);
   Py_CLEAR(clear_module_state->__pyx_n_s_Pyx_FlagBase___str);
-  Py_CLEAR(clear_module_state->__pyx_n_s_UnexpectedPart);
   Py_CLEAR(clear_module_state->__pyx_kp_s_Unknown_enum_value_s);
   Py_CLEAR(clear_module_state->__pyx_n_s_ValueError);
   Py_CLEAR(clear_module_state->__pyx_kp_b__12);
@@ -3666,14 +3673,14 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_n_s_value);
   Py_CLEAR(clear_module_state->__pyx_n_s_values);
   Py_CLEAR(clear_module_state->__pyx_int_0);
+  Py_CLEAR(clear_module_state->__pyx_int_1564805);
   Py_CLEAR(clear_module_state->__pyx_int_8739453);
   Py_CLEAR(clear_module_state->__pyx_int_12740226);
   Py_CLEAR(clear_module_state->__pyx_int_12977755);
   Py_CLEAR(clear_module_state->__pyx_int_13437850);
-  Py_CLEAR(clear_module_state->__pyx_int_69775237);
+  Py_CLEAR(clear_module_state->__pyx_int_97839140);
   Py_CLEAR(clear_module_state->__pyx_int_121382421);
-  Py_CLEAR(clear_module_state->__pyx_int_129688504);
-  Py_CLEAR(clear_module_state->__pyx_int_183600964);
+  Py_CLEAR(clear_module_state->__pyx_int_201872428);
   Py_CLEAR(clear_module_state->__pyx_int_222419149);
   Py_CLEAR(clear_module_state->__pyx_int_228825662);
   Py_CLEAR(clear_module_state->__pyx_int_238750788);
@@ -3800,11 +3807,15 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_n_s_AsyncPart_set_multipart_content);
   Py_VISIT(traverse_module_state->__pyx_n_s_AsyncPart_set_multipart_filename);
   Py_VISIT(traverse_module_state->__pyx_n_s_AsyncPart_start);
-  Py_VISIT(traverse_module_state->__pyx_n_s_Delimiting);
+  Py_VISIT(traverse_module_state->__pyx_n_s_E_DELIMITING);
+  Py_VISIT(traverse_module_state->__pyx_n_s_E_INTERNAL);
+  Py_VISIT(traverse_module_state->__pyx_n_s_E_PART_HEADERS);
+  Py_VISIT(traverse_module_state->__pyx_n_s_E_UNEXPECTED_PART);
   Py_VISIT(traverse_module_state->__pyx_kp_u_Empty_values_not_allowed);
   Py_VISIT(traverse_module_state->__pyx_n_s_EnumBase);
   Py_VISIT(traverse_module_state->__pyx_n_s_EnumType);
-  Py_VISIT(traverse_module_state->__pyx_n_s_ErrorGroup);
+  Py_VISIT(traverse_module_state->__pyx_n_s_ErrorCode);
+  Py_VISIT(traverse_module_state->__pyx_kp_s_Errors_that_can_be_reported_to);
   Py_VISIT(traverse_module_state->__pyx_n_s_Finder);
   Py_VISIT(traverse_module_state->__pyx_n_s_Finder___reduce_cython);
   Py_VISIT(traverse_module_state->__pyx_n_s_Finder___setstate_cython);
@@ -3819,7 +3830,6 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4);
   Py_VISIT(traverse_module_state->__pyx_n_s_IntEnum);
   Py_VISIT(traverse_module_state->__pyx_n_s_IntFlag);
-  Py_VISIT(traverse_module_state->__pyx_n_s_Internal);
   Py_VISIT(traverse_module_state->__pyx_n_s_NullTarget);
   Py_VISIT(traverse_module_state->__pyx_n_s_OrderedDict);
   Py_VISIT(traverse_module_state->__pyx_n_s_Parser);
@@ -3837,7 +3847,6 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_n_s_Parser_set_active_part);
   Py_VISIT(traverse_module_state->__pyx_n_s_Parser_unset_active_part);
   Py_VISIT(traverse_module_state->__pyx_n_s_Part);
-  Py_VISIT(traverse_module_state->__pyx_n_s_PartHeaders);
   Py_VISIT(traverse_module_state->__pyx_n_s_Part___reduce_cython);
   Py_VISIT(traverse_module_state->__pyx_n_s_Part___setstate_cython);
   Py_VISIT(traverse_module_state->__pyx_n_s_Part_add_target);
@@ -3857,7 +3866,6 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_n_s_Pyx_FlagBase___new);
   Py_VISIT(traverse_module_state->__pyx_n_s_Pyx_FlagBase___repr);
   Py_VISIT(traverse_module_state->__pyx_n_s_Pyx_FlagBase___str);
-  Py_VISIT(traverse_module_state->__pyx_n_s_UnexpectedPart);
   Py_VISIT(traverse_module_state->__pyx_kp_s_Unknown_enum_value_s);
   Py_VISIT(traverse_module_state->__pyx_n_s_ValueError);
   Py_VISIT(traverse_module_state->__pyx_kp_b__12);
@@ -3994,14 +4002,14 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_n_s_value);
   Py_VISIT(traverse_module_state->__pyx_n_s_values);
   Py_VISIT(traverse_module_state->__pyx_int_0);
+  Py_VISIT(traverse_module_state->__pyx_int_1564805);
   Py_VISIT(traverse_module_state->__pyx_int_8739453);
   Py_VISIT(traverse_module_state->__pyx_int_12740226);
   Py_VISIT(traverse_module_state->__pyx_int_12977755);
   Py_VISIT(traverse_module_state->__pyx_int_13437850);
-  Py_VISIT(traverse_module_state->__pyx_int_69775237);
+  Py_VISIT(traverse_module_state->__pyx_int_97839140);
   Py_VISIT(traverse_module_state->__pyx_int_121382421);
-  Py_VISIT(traverse_module_state->__pyx_int_129688504);
-  Py_VISIT(traverse_module_state->__pyx_int_183600964);
+  Py_VISIT(traverse_module_state->__pyx_int_201872428);
   Py_VISIT(traverse_module_state->__pyx_int_222419149);
   Py_VISIT(traverse_module_state->__pyx_int_228825662);
   Py_VISIT(traverse_module_state->__pyx_int_238750788);
@@ -4138,11 +4146,15 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_n_s_AsyncPart_set_multipart_content __pyx_mstate_global->__pyx_n_s_AsyncPart_set_multipart_content
 #define __pyx_n_s_AsyncPart_set_multipart_filename __pyx_mstate_global->__pyx_n_s_AsyncPart_set_multipart_filename
 #define __pyx_n_s_AsyncPart_start __pyx_mstate_global->__pyx_n_s_AsyncPart_start
-#define __pyx_n_s_Delimiting __pyx_mstate_global->__pyx_n_s_Delimiting
+#define __pyx_n_s_E_DELIMITING __pyx_mstate_global->__pyx_n_s_E_DELIMITING
+#define __pyx_n_s_E_INTERNAL __pyx_mstate_global->__pyx_n_s_E_INTERNAL
+#define __pyx_n_s_E_PART_HEADERS __pyx_mstate_global->__pyx_n_s_E_PART_HEADERS
+#define __pyx_n_s_E_UNEXPECTED_PART __pyx_mstate_global->__pyx_n_s_E_UNEXPECTED_PART
 #define __pyx_kp_u_Empty_values_not_allowed __pyx_mstate_global->__pyx_kp_u_Empty_values_not_allowed
 #define __pyx_n_s_EnumBase __pyx_mstate_global->__pyx_n_s_EnumBase
 #define __pyx_n_s_EnumType __pyx_mstate_global->__pyx_n_s_EnumType
-#define __pyx_n_s_ErrorGroup __pyx_mstate_global->__pyx_n_s_ErrorGroup
+#define __pyx_n_s_ErrorCode __pyx_mstate_global->__pyx_n_s_ErrorCode
+#define __pyx_kp_s_Errors_that_can_be_reported_to __pyx_mstate_global->__pyx_kp_s_Errors_that_can_be_reported_to
 #define __pyx_n_s_Finder __pyx_mstate_global->__pyx_n_s_Finder
 #define __pyx_n_s_Finder___reduce_cython __pyx_mstate_global->__pyx_n_s_Finder___reduce_cython
 #define __pyx_n_s_Finder___setstate_cython __pyx_mstate_global->__pyx_n_s_Finder___setstate_cython
@@ -4157,7 +4169,6 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4 __pyx_mstate_global->__pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4
 #define __pyx_n_s_IntEnum __pyx_mstate_global->__pyx_n_s_IntEnum
 #define __pyx_n_s_IntFlag __pyx_mstate_global->__pyx_n_s_IntFlag
-#define __pyx_n_s_Internal __pyx_mstate_global->__pyx_n_s_Internal
 #define __pyx_n_s_NullTarget __pyx_mstate_global->__pyx_n_s_NullTarget
 #define __pyx_n_s_OrderedDict __pyx_mstate_global->__pyx_n_s_OrderedDict
 #define __pyx_n_s_Parser __pyx_mstate_global->__pyx_n_s_Parser
@@ -4175,7 +4186,6 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_n_s_Parser_set_active_part __pyx_mstate_global->__pyx_n_s_Parser_set_active_part
 #define __pyx_n_s_Parser_unset_active_part __pyx_mstate_global->__pyx_n_s_Parser_unset_active_part
 #define __pyx_n_s_Part __pyx_mstate_global->__pyx_n_s_Part
-#define __pyx_n_s_PartHeaders __pyx_mstate_global->__pyx_n_s_PartHeaders
 #define __pyx_n_s_Part___reduce_cython __pyx_mstate_global->__pyx_n_s_Part___reduce_cython
 #define __pyx_n_s_Part___setstate_cython __pyx_mstate_global->__pyx_n_s_Part___setstate_cython
 #define __pyx_n_s_Part_add_target __pyx_mstate_global->__pyx_n_s_Part_add_target
@@ -4195,7 +4205,6 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_n_s_Pyx_FlagBase___new __pyx_mstate_global->__pyx_n_s_Pyx_FlagBase___new
 #define __pyx_n_s_Pyx_FlagBase___repr __pyx_mstate_global->__pyx_n_s_Pyx_FlagBase___repr
 #define __pyx_n_s_Pyx_FlagBase___str __pyx_mstate_global->__pyx_n_s_Pyx_FlagBase___str
-#define __pyx_n_s_UnexpectedPart __pyx_mstate_global->__pyx_n_s_UnexpectedPart
 #define __pyx_kp_s_Unknown_enum_value_s __pyx_mstate_global->__pyx_kp_s_Unknown_enum_value_s
 #define __pyx_n_s_ValueError __pyx_mstate_global->__pyx_n_s_ValueError
 #define __pyx_kp_b__12 __pyx_mstate_global->__pyx_kp_b__12
@@ -4332,14 +4341,14 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_n_s_value __pyx_mstate_global->__pyx_n_s_value
 #define __pyx_n_s_values __pyx_mstate_global->__pyx_n_s_values
 #define __pyx_int_0 __pyx_mstate_global->__pyx_int_0
+#define __pyx_int_1564805 __pyx_mstate_global->__pyx_int_1564805
 #define __pyx_int_8739453 __pyx_mstate_global->__pyx_int_8739453
 #define __pyx_int_12740226 __pyx_mstate_global->__pyx_int_12740226
 #define __pyx_int_12977755 __pyx_mstate_global->__pyx_int_12977755
 #define __pyx_int_13437850 __pyx_mstate_global->__pyx_int_13437850
-#define __pyx_int_69775237 __pyx_mstate_global->__pyx_int_69775237
+#define __pyx_int_97839140 __pyx_mstate_global->__pyx_int_97839140
 #define __pyx_int_121382421 __pyx_mstate_global->__pyx_int_121382421
-#define __pyx_int_129688504 __pyx_mstate_global->__pyx_int_129688504
-#define __pyx_int_183600964 __pyx_mstate_global->__pyx_int_183600964
+#define __pyx_int_201872428 __pyx_mstate_global->__pyx_int_201872428
 #define __pyx_int_222419149 __pyx_mstate_global->__pyx_int_222419149
 #define __pyx_int_228825662 __pyx_mstate_global->__pyx_int_228825662
 #define __pyx_int_238750788 __pyx_mstate_global->__pyx_int_238750788
@@ -4415,13 +4424,13 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 
 /* "EnumTypeToPy":3
  * 
- * @cname("__Pyx_Enum_54f4e2__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorGroup__etc_to_py")
- * cdef __Pyx_Enum_54f4e2__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorGroup__etc_to_py(ErrorGroup c_val):             # <<<<<<<<<<<<<<
+ * @cname("__Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py")
+ * cdef __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(ErrorCode c_val):             # <<<<<<<<<<<<<<
  *     cdef object __pyx_enum
- *     __pyx_enum = ErrorGroup
+ *     __pyx_enum = ErrorCode
  */
 
-static PyObject *__Pyx_Enum_54f4e2__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorGroup__etc_to_py(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup __pyx_v_c_val) {
+static PyObject *__Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode __pyx_v_c_val) {
   PyObject *__pyx_v___pyx_enum = 0;
   int __pyx_v_underlying_c_val;
   PyObject *__pyx_r = NULL;
@@ -4434,39 +4443,39 @@ static PyObject *__Pyx_Enum_54f4e2__19streaming_form_data_7_parser_enum__dunderp
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
-  __Pyx_RefNannySetupContext("__Pyx_Enum_54f4e2__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorGroup__etc_to_py", 1);
+  __Pyx_RefNannySetupContext("__Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py", 1);
 
   /* "EnumTypeToPy":5
- * cdef __Pyx_Enum_54f4e2__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorGroup__etc_to_py(ErrorGroup c_val):
+ * cdef __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(ErrorCode c_val):
  *     cdef object __pyx_enum
- *     __pyx_enum = ErrorGroup             # <<<<<<<<<<<<<<
+ *     __pyx_enum = ErrorCode             # <<<<<<<<<<<<<<
  * 
  *     if 0:
  */
-  __Pyx_GetModuleGlobalName(__pyx_t_1, __pyx_n_s_ErrorGroup); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 5, __pyx_L1_error)
+  __Pyx_GetModuleGlobalName(__pyx_t_1, __pyx_n_s_ErrorCode); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 5, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
   __pyx_v___pyx_enum = __pyx_t_1;
   __pyx_t_1 = 0;
 
   /* "EnumTypeToPy":7
- *     __pyx_enum = ErrorGroup
+ *     __pyx_enum = ErrorCode
  * 
  *     if 0:             # <<<<<<<<<<<<<<
  *         pass
- *     elif c_val == ErrorGroup.Internal:
+ *     elif c_val == ErrorCode.E_INTERNAL:
  */
   switch (__pyx_v_c_val) {
-    case __pyx_e_19streaming_form_data_7_parser_Internal:
+    case __pyx_e_19streaming_form_data_7_parser_E_INTERNAL:
 
     /* "EnumTypeToPy":10
  *         pass
- *     elif c_val == ErrorGroup.Internal:
- *         return __pyx_enum.Internal             # <<<<<<<<<<<<<<
- *     elif c_val == ErrorGroup.Delimiting:
- *         return __pyx_enum.Delimiting
+ *     elif c_val == ErrorCode.E_INTERNAL:
+ *         return __pyx_enum.E_INTERNAL             # <<<<<<<<<<<<<<
+ *     elif c_val == ErrorCode.E_DELIMITING:
+ *         return __pyx_enum.E_DELIMITING
  */
     __Pyx_XDECREF(__pyx_r);
-    __pyx_t_1 = __Pyx_PyObject_GetAttrStr(__pyx_v___pyx_enum, __pyx_n_s_Internal); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 10, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_PyObject_GetAttrStr(__pyx_v___pyx_enum, __pyx_n_s_E_INTERNAL); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 10, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_1);
     __pyx_r = __pyx_t_1;
     __pyx_t_1 = 0;
@@ -4475,87 +4484,87 @@ static PyObject *__Pyx_Enum_54f4e2__19streaming_form_data_7_parser_enum__dunderp
     /* "EnumTypeToPy":9
  *     if 0:
  *         pass
- *     elif c_val == ErrorGroup.Internal:             # <<<<<<<<<<<<<<
- *         return __pyx_enum.Internal
- *     elif c_val == ErrorGroup.Delimiting:
+ *     elif c_val == ErrorCode.E_INTERNAL:             # <<<<<<<<<<<<<<
+ *         return __pyx_enum.E_INTERNAL
+ *     elif c_val == ErrorCode.E_DELIMITING:
  */
     break;
-    case __pyx_e_19streaming_form_data_7_parser_Delimiting:
+    case __pyx_e_19streaming_form_data_7_parser_E_DELIMITING:
 
     /* "EnumTypeToPy":12
- *         return __pyx_enum.Internal
- *     elif c_val == ErrorGroup.Delimiting:
- *         return __pyx_enum.Delimiting             # <<<<<<<<<<<<<<
- *     elif c_val == ErrorGroup.PartHeaders:
- *         return __pyx_enum.PartHeaders
+ *         return __pyx_enum.E_INTERNAL
+ *     elif c_val == ErrorCode.E_DELIMITING:
+ *         return __pyx_enum.E_DELIMITING             # <<<<<<<<<<<<<<
+ *     elif c_val == ErrorCode.E_PART_HEADERS:
+ *         return __pyx_enum.E_PART_HEADERS
  */
     __Pyx_XDECREF(__pyx_r);
-    __pyx_t_1 = __Pyx_PyObject_GetAttrStr(__pyx_v___pyx_enum, __pyx_n_s_Delimiting); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 12, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_PyObject_GetAttrStr(__pyx_v___pyx_enum, __pyx_n_s_E_DELIMITING); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 12, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_1);
     __pyx_r = __pyx_t_1;
     __pyx_t_1 = 0;
     goto __pyx_L0;
 
     /* "EnumTypeToPy":11
- *     elif c_val == ErrorGroup.Internal:
- *         return __pyx_enum.Internal
- *     elif c_val == ErrorGroup.Delimiting:             # <<<<<<<<<<<<<<
- *         return __pyx_enum.Delimiting
- *     elif c_val == ErrorGroup.PartHeaders:
+ *     elif c_val == ErrorCode.E_INTERNAL:
+ *         return __pyx_enum.E_INTERNAL
+ *     elif c_val == ErrorCode.E_DELIMITING:             # <<<<<<<<<<<<<<
+ *         return __pyx_enum.E_DELIMITING
+ *     elif c_val == ErrorCode.E_PART_HEADERS:
  */
     break;
-    case __pyx_e_19streaming_form_data_7_parser_PartHeaders:
+    case __pyx_e_19streaming_form_data_7_parser_E_PART_HEADERS:
 
     /* "EnumTypeToPy":14
- *         return __pyx_enum.Delimiting
- *     elif c_val == ErrorGroup.PartHeaders:
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@@ -4604,10 +4613,10 @@ static PyObject *__Pyx_Enum_54f4e2__19streaming_form_data_7_parser_enum__dunderp
 
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+ * @cname("__Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py")
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  *     cdef object __pyx_enum
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+  __Pyx_AddTraceback("EnumTypeToPy.__Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py", __pyx_clineno, __pyx_lineno, __pyx_filename);
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-      /* "streaming_form_data/_parser.pyx":54
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-  /* "streaming_form_data/_parser.pyx":51
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-  /* "streaming_form_data/_parser.pyx":79
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  */
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     PyErr_SetString(PyExc_TypeError, "object of type 'NoneType' has no len()");
-    __PYX_ERR(0, 305, __pyx_L1_error)
+    __PYX_ERR(0, 313, __pyx_L1_error)
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-  __pyx_t_2 = __Pyx_PyBytes_GET_SIZE(__pyx_v_chunk); if (unlikely(__pyx_t_2 == ((Py_ssize_t)-1))) __PYX_ERR(0, 305, __pyx_L1_error)
+  __pyx_t_2 = __Pyx_PyBytes_GET_SIZE(__pyx_v_chunk); if (unlikely(__pyx_t_2 == ((Py_ssize_t)-1))) __PYX_ERR(0, 313, __pyx_L1_error)
   __pyx_v_chunk_len = __pyx_t_2;
 
-  /* "streaming_form_data/_parser.pyx":306
+  /* "streaming_form_data/_parser.pyx":314
  *         chunk_ptr = chunk
  *         chunk_len = len(chunk)
  *         buffer_start = 0             # <<<<<<<<<<<<<<
@@ -15963,7 +15972,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
   __pyx_v_buffer_start = 0;
 
-  /* "streaming_form_data/_parser.pyx":308
+  /* "streaming_form_data/_parser.pyx":316
  *         buffer_start = 0
  * 
  *         idx = index             # <<<<<<<<<<<<<<
@@ -15972,7 +15981,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
   __pyx_v_idx = __pyx_v_index;
 
-  /* "streaming_form_data/_parser.pyx":309
+  /* "streaming_form_data/_parser.pyx":317
  * 
  *         idx = index
  *         while idx < chunk_len:             # <<<<<<<<<<<<<<
@@ -15983,7 +15992,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
     __pyx_t_3 = (__pyx_v_idx < __pyx_v_chunk_len);
     if (!__pyx_t_3) break;
 
-    /* "streaming_form_data/_parser.pyx":310
+    /* "streaming_form_data/_parser.pyx":318
  *         idx = index
  *         while idx < chunk_len:
  *             byte = chunk_ptr[idx]             # <<<<<<<<<<<<<<
@@ -15992,7 +16001,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
     __pyx_v_byte = (__pyx_v_chunk_ptr[__pyx_v_idx]);
 
-    /* "streaming_form_data/_parser.pyx":312
+    /* "streaming_form_data/_parser.pyx":320
  *             byte = chunk_ptr[idx]
  * 
  *             if self.state == ParserState.PS_START:             # <<<<<<<<<<<<<<
@@ -16002,7 +16011,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
     switch (__pyx_v_self->state) {
       case __pyx_e_19streaming_form_data_7_parser_PS_START:
 
-      /* "streaming_form_data/_parser.pyx":313
+      /* "streaming_form_data/_parser.pyx":321
  * 
  *             if self.state == ParserState.PS_START:
  *                 if byte == c_hyphen:             # <<<<<<<<<<<<<<
@@ -16012,7 +16021,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       __pyx_t_3 = (__pyx_v_byte == __pyx_v_19streaming_form_data_7_parser_c_hyphen);
       if (__pyx_t_3) {
 
-        /* "streaming_form_data/_parser.pyx":314
+        /* "streaming_form_data/_parser.pyx":322
  *             if self.state == ParserState.PS_START:
  *                 if byte == c_hyphen:
  *                     buffer_start = idx             # <<<<<<<<<<<<<<
@@ -16021,7 +16030,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         __pyx_v_buffer_start = __pyx_v_idx;
 
-        /* "streaming_form_data/_parser.pyx":315
+        /* "streaming_form_data/_parser.pyx":323
  *                 if byte == c_hyphen:
  *                     buffer_start = idx
  *                     self.state = ParserState.PS_STARTING_BOUNDARY             # <<<<<<<<<<<<<<
@@ -16030,7 +16039,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_STARTING_BOUNDARY;
 
-        /* "streaming_form_data/_parser.pyx":313
+        /* "streaming_form_data/_parser.pyx":321
  * 
  *             if self.state == ParserState.PS_START:
  *                 if byte == c_hyphen:             # <<<<<<<<<<<<<<
@@ -16040,7 +16049,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         goto __pyx_L5;
       }
 
-      /* "streaming_form_data/_parser.pyx":316
+      /* "streaming_form_data/_parser.pyx":324
  *                     buffer_start = idx
  *                     self.state = ParserState.PS_STARTING_BOUNDARY
  *                 elif byte == c_cr:             # <<<<<<<<<<<<<<
@@ -16050,16 +16059,16 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       __pyx_t_3 = (__pyx_v_byte == __pyx_v_19streaming_form_data_7_parser_c_cr);
       if (__pyx_t_3) {
 
-        /* "streaming_form_data/_parser.pyx":317
+        /* "streaming_form_data/_parser.pyx":325
  *                     self.state = ParserState.PS_STARTING_BOUNDARY
  *                 elif byte == c_cr:
  *                     self.state = ParserState.PS_START_CR             # <<<<<<<<<<<<<<
  *                 else:
- *                     self.mark_error()
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
  */
         __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_START_CR;
 
-        /* "streaming_form_data/_parser.pyx":316
+        /* "streaming_form_data/_parser.pyx":324
  *                     buffer_start = idx
  *                     self.state = ParserState.PS_STARTING_BOUNDARY
  *                 elif byte == c_cr:             # <<<<<<<<<<<<<<
@@ -16069,27 +16078,16 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         goto __pyx_L5;
       }
 
-      /* "streaming_form_data/_parser.pyx":319
+      /* "streaming_form_data/_parser.pyx":327
  *                     self.state = ParserState.PS_START_CR
  *                 else:
- *                     self.mark_error()             # <<<<<<<<<<<<<<
- *                     return ErrorGroup.Delimiting + 1
- * 
- */
-      /*else*/ {
-        __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 319, __pyx_L1_error)
-        __Pyx_GOTREF(__pyx_t_4);
-        __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
-
-        /* "streaming_form_data/_parser.pyx":320
- *                 else:
- *                     self.mark_error()
- *                     return ErrorGroup.Delimiting + 1             # <<<<<<<<<<<<<<
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)             # <<<<<<<<<<<<<<
  * 
  *             elif self.state == ParserState.PS_START_CR:
  */
+      /*else*/ {
         __Pyx_XDECREF(__pyx_r);
-        __pyx_t_4 = __Pyx_PyInt_From_long((__pyx_e_19streaming_form_data_7_parser_Delimiting + 1)); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 320, __pyx_L1_error)
+        __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_DELIMITING); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 327, __pyx_L1_error)
         __Pyx_GOTREF(__pyx_t_4);
         __pyx_r = __pyx_t_4;
         __pyx_t_4 = 0;
@@ -16097,7 +16095,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       }
       __pyx_L5:;
 
-      /* "streaming_form_data/_parser.pyx":312
+      /* "streaming_form_data/_parser.pyx":320
  *             byte = chunk_ptr[idx]
  * 
  *             if self.state == ParserState.PS_START:             # <<<<<<<<<<<<<<
@@ -16107,7 +16105,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       break;
       case __pyx_e_19streaming_form_data_7_parser_PS_START_CR:
 
-      /* "streaming_form_data/_parser.pyx":323
+      /* "streaming_form_data/_parser.pyx":330
  * 
  *             elif self.state == ParserState.PS_START_CR:
  *                 if byte == c_lf:             # <<<<<<<<<<<<<<
@@ -16117,16 +16115,16 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       __pyx_t_3 = (__pyx_v_byte == __pyx_v_19streaming_form_data_7_parser_c_lf);
       if (__pyx_t_3) {
 
-        /* "streaming_form_data/_parser.pyx":324
+        /* "streaming_form_data/_parser.pyx":331
  *             elif self.state == ParserState.PS_START_CR:
  *                 if byte == c_lf:
  *                     self.state = ParserState.PS_START             # <<<<<<<<<<<<<<
  *                 else:
- *                     self.mark_error()
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
  */
         __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_START;
 
-        /* "streaming_form_data/_parser.pyx":323
+        /* "streaming_form_data/_parser.pyx":330
  * 
  *             elif self.state == ParserState.PS_START_CR:
  *                 if byte == c_lf:             # <<<<<<<<<<<<<<
@@ -16136,27 +16134,16 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         goto __pyx_L6;
       }
 
-      /* "streaming_form_data/_parser.pyx":326
+      /* "streaming_form_data/_parser.pyx":333
  *                     self.state = ParserState.PS_START
  *                 else:
- *                     self.mark_error()             # <<<<<<<<<<<<<<
- *                     return ErrorGroup.Delimiting + 4
- * 
- */
-      /*else*/ {
-        __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 326, __pyx_L1_error)
-        __Pyx_GOTREF(__pyx_t_4);
-        __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
-
-        /* "streaming_form_data/_parser.pyx":327
- *                 else:
- *                     self.mark_error()
- *                     return ErrorGroup.Delimiting + 4             # <<<<<<<<<<<<<<
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)             # <<<<<<<<<<<<<<
  * 
  *             elif self.state == ParserState.PS_STARTING_BOUNDARY:
  */
+      /*else*/ {
         __Pyx_XDECREF(__pyx_r);
-        __pyx_t_4 = __Pyx_PyInt_From_long((__pyx_e_19streaming_form_data_7_parser_Delimiting + 4)); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 327, __pyx_L1_error)
+        __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_DELIMITING); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 333, __pyx_L1_error)
         __Pyx_GOTREF(__pyx_t_4);
         __pyx_r = __pyx_t_4;
         __pyx_t_4 = 0;
@@ -16164,8 +16151,8 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       }
       __pyx_L6:;
 
-      /* "streaming_form_data/_parser.pyx":322
- *                     return ErrorGroup.Delimiting + 1
+      /* "streaming_form_data/_parser.pyx":329
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
  * 
  *             elif self.state == ParserState.PS_START_CR:             # <<<<<<<<<<<<<<
  *                 if byte == c_lf:
@@ -16174,52 +16161,41 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       break;
       case __pyx_e_19streaming_form_data_7_parser_PS_STARTING_BOUNDARY:
 
-      /* "streaming_form_data/_parser.pyx":330
+      /* "streaming_form_data/_parser.pyx":336
  * 
  *             elif self.state == ParserState.PS_STARTING_BOUNDARY:
  *                 if byte != c_hyphen:             # <<<<<<<<<<<<<<
- *                     self.mark_error()
- *                     return ErrorGroup.Delimiting + 2
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
+ * 
  */
       __pyx_t_3 = (__pyx_v_byte != __pyx_v_19streaming_form_data_7_parser_c_hyphen);
       if (__pyx_t_3) {
 
-        /* "streaming_form_data/_parser.pyx":331
+        /* "streaming_form_data/_parser.pyx":337
  *             elif self.state == ParserState.PS_STARTING_BOUNDARY:
  *                 if byte != c_hyphen:
- *                     self.mark_error()             # <<<<<<<<<<<<<<
- *                     return ErrorGroup.Delimiting + 2
- * 
- */
-        __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 331, __pyx_L1_error)
-        __Pyx_GOTREF(__pyx_t_4);
-        __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
-
-        /* "streaming_form_data/_parser.pyx":332
- *                 if byte != c_hyphen:
- *                     self.mark_error()
- *                     return ErrorGroup.Delimiting + 2             # <<<<<<<<<<<<<<
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)             # <<<<<<<<<<<<<<
  * 
  *                 self.state = ParserState.PS_READING_BOUNDARY
  */
         __Pyx_XDECREF(__pyx_r);
-        __pyx_t_4 = __Pyx_PyInt_From_long((__pyx_e_19streaming_form_data_7_parser_Delimiting + 2)); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 332, __pyx_L1_error)
+        __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_DELIMITING); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 337, __pyx_L1_error)
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         __pyx_r = __pyx_t_4;
         __pyx_t_4 = 0;
         goto __pyx_L0;
 
-        /* "streaming_form_data/_parser.pyx":330
+        /* "streaming_form_data/_parser.pyx":336
  * 
  *             elif self.state == ParserState.PS_STARTING_BOUNDARY:
  *                 if byte != c_hyphen:             # <<<<<<<<<<<<<<
- *                     self.mark_error()
- *                     return ErrorGroup.Delimiting + 2
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
+ * 
  */
       }
 
-      /* "streaming_form_data/_parser.pyx":334
- *                     return ErrorGroup.Delimiting + 2
+      /* "streaming_form_data/_parser.pyx":339
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
  * 
  *                 self.state = ParserState.PS_READING_BOUNDARY             # <<<<<<<<<<<<<<
  *             elif self.state == ParserState.PS_READING_BOUNDARY:
@@ -16227,17 +16203,17 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_READING_BOUNDARY;
 
-      /* "streaming_form_data/_parser.pyx":329
- *                     return ErrorGroup.Delimiting + 4
+      /* "streaming_form_data/_parser.pyx":335
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
  * 
  *             elif self.state == ParserState.PS_STARTING_BOUNDARY:             # <<<<<<<<<<<<<<
  *                 if byte != c_hyphen:
- *                     self.mark_error()
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
  */
       break;
       case __pyx_e_19streaming_form_data_7_parser_PS_READING_BOUNDARY:
 
-      /* "streaming_form_data/_parser.pyx":336
+      /* "streaming_form_data/_parser.pyx":341
  *                 self.state = ParserState.PS_READING_BOUNDARY
  *             elif self.state == ParserState.PS_READING_BOUNDARY:
  *                 if byte == c_cr:             # <<<<<<<<<<<<<<
@@ -16247,7 +16223,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       __pyx_t_3 = (__pyx_v_byte == __pyx_v_19streaming_form_data_7_parser_c_cr);
       if (__pyx_t_3) {
 
-        /* "streaming_form_data/_parser.pyx":337
+        /* "streaming_form_data/_parser.pyx":342
  *             elif self.state == ParserState.PS_READING_BOUNDARY:
  *                 if byte == c_cr:
  *                     self.state = ParserState.PS_ENDING_BOUNDARY             # <<<<<<<<<<<<<<
@@ -16256,7 +16232,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_ENDING_BOUNDARY;
 
-        /* "streaming_form_data/_parser.pyx":336
+        /* "streaming_form_data/_parser.pyx":341
  *                 self.state = ParserState.PS_READING_BOUNDARY
  *             elif self.state == ParserState.PS_READING_BOUNDARY:
  *                 if byte == c_cr:             # <<<<<<<<<<<<<<
@@ -16265,7 +16241,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       }
 
-      /* "streaming_form_data/_parser.pyx":335
+      /* "streaming_form_data/_parser.pyx":340
  * 
  *                 self.state = ParserState.PS_READING_BOUNDARY
  *             elif self.state == ParserState.PS_READING_BOUNDARY:             # <<<<<<<<<<<<<<
@@ -16275,106 +16251,84 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       break;
       case __pyx_e_19streaming_form_data_7_parser_PS_ENDING_BOUNDARY:
 
-      /* "streaming_form_data/_parser.pyx":340
+      /* "streaming_form_data/_parser.pyx":345
  * 
  *             elif self.state == ParserState.PS_ENDING_BOUNDARY:
  *                 if byte != c_lf:             # <<<<<<<<<<<<<<
- *                     self.mark_error()
- *                     return ErrorGroup.Delimiting + 3
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
+ * 
  */
       __pyx_t_3 = (__pyx_v_byte != __pyx_v_19streaming_form_data_7_parser_c_lf);
       if (__pyx_t_3) {
 
-        /* "streaming_form_data/_parser.pyx":341
+        /* "streaming_form_data/_parser.pyx":346
  *             elif self.state == ParserState.PS_ENDING_BOUNDARY:
  *                 if byte != c_lf:
- *                     self.mark_error()             # <<<<<<<<<<<<<<
- *                     return ErrorGroup.Delimiting + 3
- * 
- */
-        __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 341, __pyx_L1_error)
-        __Pyx_GOTREF(__pyx_t_4);
-        __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
-
-        /* "streaming_form_data/_parser.pyx":342
- *                 if byte != c_lf:
- *                     self.mark_error()
- *                     return ErrorGroup.Delimiting + 3             # <<<<<<<<<<<<<<
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)             # <<<<<<<<<<<<<<
  * 
  *                 # ensure we have read correct starting delimiter
  */
         __Pyx_XDECREF(__pyx_r);
-        __pyx_t_4 = __Pyx_PyInt_From_long((__pyx_e_19streaming_form_data_7_parser_Delimiting + 3)); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 342, __pyx_L1_error)
+        __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_DELIMITING); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 346, __pyx_L1_error)
         __Pyx_GOTREF(__pyx_t_4);
         __pyx_r = __pyx_t_4;
         __pyx_t_4 = 0;
         goto __pyx_L0;
 
-        /* "streaming_form_data/_parser.pyx":340
+        /* "streaming_form_data/_parser.pyx":345
  * 
  *             elif self.state == ParserState.PS_ENDING_BOUNDARY:
  *                 if byte != c_lf:             # <<<<<<<<<<<<<<
- *                     self.mark_error()
- *                     return ErrorGroup.Delimiting + 3
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
+ * 
  */
       }
 
-      /* "streaming_form_data/_parser.pyx":345
+      /* "streaming_form_data/_parser.pyx":349
  * 
  *                 # ensure we have read correct starting delimiter
  *                 if b"\r\n" + chunk[buffer_start: idx + 1] != self.delimiter_finder.target:             # <<<<<<<<<<<<<<
- *                     self.mark_error()
- *                     return ErrorGroup.Delimiting + 5
+ *                     return self.mark_error(ErrorCode.E_DELIMITING)
+ * 
  */
       if (unlikely(__pyx_v_chunk == Py_None)) {
         PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-        __PYX_ERR(0, 345, __pyx_L1_error)
+        __PYX_ERR(0, 349, __pyx_L1_error)
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-      __pyx_t_4 = PySequence_GetSlice(__pyx_v_chunk, __pyx_v_buffer_start, (__pyx_v_idx + 1)); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 345, __pyx_L1_error)
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@@ -16667,37 +16599,37 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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         __Pyx_XDECREF_SET(__pyx_v_name, __pyx_t_6);
         __pyx_t_6 = 0;
 
-        /* "streaming_form_data/_parser.pyx":373
+        /* "streaming_form_data/_parser.pyx":374
  *                     name = params.get("name")
  * 
  *                     if name:             # <<<<<<<<<<<<<<
  *                         part = self._part_for(name)
  *                         if part is None:
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-        __pyx_t_9 = __Pyx_PyObject_IsTrue(__pyx_v_name); if (unlikely((__pyx_t_9 < 0))) __PYX_ERR(0, 373, __pyx_L1_error)
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         if (__pyx_t_9) {
 
-          /* "streaming_form_data/_parser.pyx":374
+          /* "streaming_form_data/_parser.pyx":375
  * 
  *                     if name:
  *                         part = self._part_for(name)             # <<<<<<<<<<<<<<
  *                         if part is None:
  *                             part = self.default_part
  */
-          if (!(likely(PyUnicode_CheckExact(__pyx_v_name))||((__pyx_v_name) == Py_None) || __Pyx_RaiseUnexpectedTypeError("unicode", __pyx_v_name))) __PYX_ERR(0, 374, __pyx_L1_error)
-          __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->_part_for(__pyx_v_self, ((PyObject*)__pyx_v_name)); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 374, __pyx_L1_error)
+          if (!(likely(PyUnicode_CheckExact(__pyx_v_name))||((__pyx_v_name) == Py_None) || __Pyx_RaiseUnexpectedTypeError("unicode", __pyx_v_name))) __PYX_ERR(0, 375, __pyx_L1_error)
+          __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->_part_for(__pyx_v_self, ((PyObject*)__pyx_v_name)); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 375, __pyx_L1_error)
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           __Pyx_XDECREF_SET(__pyx_v_part, __pyx_t_6);
           __pyx_t_6 = 0;
 
-          /* "streaming_form_data/_parser.pyx":375
+          /* "streaming_form_data/_parser.pyx":376
  *                     if name:
  *                         part = self._part_for(name)
  *                         if part is None:             # <<<<<<<<<<<<<<
@@ -16707,7 +16639,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
           __pyx_t_9 = (__pyx_v_part == Py_None);
           if (__pyx_t_9) {
 
-            /* "streaming_form_data/_parser.pyx":376
+            /* "streaming_form_data/_parser.pyx":377
  *                         part = self._part_for(name)
  *                         if part is None:
  *                             part = self.default_part             # <<<<<<<<<<<<<<
@@ -16719,23 +16651,23 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
             __Pyx_DECREF_SET(__pyx_v_part, __pyx_t_6);
             __pyx_t_6 = 0;
 
-            /* "streaming_form_data/_parser.pyx":377
+            /* "streaming_form_data/_parser.pyx":378
  *                         if part is None:
  *                             part = self.default_part
  *                             if self.strict:             # <<<<<<<<<<<<<<
  *                                 self.unexpected_part_name = name
- *                                 self.mark_error()
+ *                                 return self.mark_error(ErrorCode.E_UNEXPECTED_PART)
  */
             if (__pyx_v_self->strict) {
 
-              /* "streaming_form_data/_parser.pyx":378
+              /* "streaming_form_data/_parser.pyx":379
  *                             part = self.default_part
  *                             if self.strict:
  *                                 self.unexpected_part_name = name             # <<<<<<<<<<<<<<
- *                                 self.mark_error()
- *                                 return ErrorGroup.UnexpectedPart
+ *                                 return self.mark_error(ErrorCode.E_UNEXPECTED_PART)
+ * 
  */
-              if (!(likely(PyUnicode_CheckExact(__pyx_v_name))||((__pyx_v_name) == Py_None) || __Pyx_RaiseUnexpectedTypeError("unicode", __pyx_v_name))) __PYX_ERR(0, 378, __pyx_L1_error)
+              if (!(likely(PyUnicode_CheckExact(__pyx_v_name))||((__pyx_v_name) == Py_None) || __Pyx_RaiseUnexpectedTypeError("unicode", __pyx_v_name))) __PYX_ERR(0, 379, __pyx_L1_error)
               __pyx_t_6 = __pyx_v_name;
               __Pyx_INCREF(__pyx_t_6);
               __Pyx_GIVEREF(__pyx_t_6);
@@ -16744,41 +16676,30 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
               __pyx_v_self->unexpected_part_name = ((PyObject*)__pyx_t_6);
               __pyx_t_6 = 0;
 
-              /* "streaming_form_data/_parser.pyx":379
- *                             if self.strict:
- *                                 self.unexpected_part_name = name
- *                                 self.mark_error()             # <<<<<<<<<<<<<<
- *                                 return ErrorGroup.UnexpectedPart
- * 
- */
-              __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 379, __pyx_L1_error)
-              __Pyx_GOTREF(__pyx_t_6);
-              __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
-
               /* "streaming_form_data/_parser.pyx":380
+ *                             if self.strict:
  *                                 self.unexpected_part_name = name
- *                                 self.mark_error()
- *                                 return ErrorGroup.UnexpectedPart             # <<<<<<<<<<<<<<
+ *                                 return self.mark_error(ErrorCode.E_UNEXPECTED_PART)             # <<<<<<<<<<<<<<
  * 
  *                         self.set_active_part(part, params.get("filename"))
  */
               __Pyx_XDECREF(__pyx_r);
-              __pyx_t_6 = __Pyx_Enum_54f4e2__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorGroup__etc_to_py(__pyx_e_19streaming_form_data_7_parser_UnexpectedPart); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 380, __pyx_L1_error)
+              __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_UNEXPECTED_PART); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 380, __pyx_L1_error)
               __Pyx_GOTREF(__pyx_t_6);
               __pyx_r = __pyx_t_6;
               __pyx_t_6 = 0;
               goto __pyx_L0;
 
-              /* "streaming_form_data/_parser.pyx":377
+              /* "streaming_form_data/_parser.pyx":378
  *                         if part is None:
  *                             part = self.default_part
  *                             if self.strict:             # <<<<<<<<<<<<<<
  *                                 self.unexpected_part_name = name
- *                                 self.mark_error()
+ *                                 return self.mark_error(ErrorCode.E_UNEXPECTED_PART)
  */
             }
 
-            /* "streaming_form_data/_parser.pyx":375
+            /* "streaming_form_data/_parser.pyx":376
  *                     if name:
  *                         part = self._part_for(name)
  *                         if part is None:             # <<<<<<<<<<<<<<
@@ -16788,7 +16709,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
           }
 
           /* "streaming_form_data/_parser.pyx":382
- *                                 return ErrorGroup.UnexpectedPart
+ *                                 return self.mark_error(ErrorCode.E_UNEXPECTED_PART)
  * 
  *                         self.set_active_part(part, params.get("filename"))             # <<<<<<<<<<<<<<
  *                 elif "content-type" in message:
@@ -16845,7 +16766,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
           }
           __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-          /* "streaming_form_data/_parser.pyx":373
+          /* "streaming_form_data/_parser.pyx":374
  *                     name = params.get("name")
  * 
  *                     if name:             # <<<<<<<<<<<<<<
@@ -16854,12 +16775,12 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         }
 
-        /* "streaming_form_data/_parser.pyx":365
+        /* "streaming_form_data/_parser.pyx":367
  *                 )
  * 
  *                 if "content-disposition" in message:             # <<<<<<<<<<<<<<
  *                     if not message.get_content_disposition() == "form-data":
- *                         self.mark_error()
+ *                         return self.mark_error(ErrorCode.E_PART_HEADERS)
  */
         goto __pyx_L13;
       }
@@ -16987,12 +16908,12 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_ENDED_HEADER;
 
-      /* "streaming_form_data/_parser.pyx":356
+      /* "streaming_form_data/_parser.pyx":359
  *                     self.state = ParserState.PS_ENDING_HEADER
  * 
  *             elif self.state == ParserState.PS_ENDING_HEADER:             # <<<<<<<<<<<<<<
  *                 if byte != c_lf:
- *                     self.mark_error()
+ *                     return self.mark_error(ErrorCode.E_PART_HEADERS)
  */
       break;
       case __pyx_e_19streaming_form_data_7_parser_PS_ENDED_HEADER:
@@ -17052,8 +16973,8 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  * 
  *             elif self.state == ParserState.PS_ENDING_ALL_HEADERS:
  *                 if byte != c_lf:             # <<<<<<<<<<<<<<
- *                     self.mark_error()
- *                     return ErrorGroup.PartHeaders + 2
+ *                     return self.mark_error(ErrorCode.E_PART_HEADERS)
+ * 
  */
       __pyx_t_9 = (__pyx_v_byte != __pyx_v_19streaming_form_data_7_parser_c_lf);
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@@ -17061,23 +16982,12 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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  *             elif self.state == ParserState.PS_ENDING_ALL_HEADERS:
  *                 if byte != c_lf:
- *                     self.mark_error()             # <<<<<<<<<<<<<<
- *                     return ErrorGroup.PartHeaders + 2
- * 
- */
-        __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 400, __pyx_L1_error)
-        __Pyx_GOTREF(__pyx_t_6);
-        __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
-
-        /* "streaming_form_data/_parser.pyx":401
- *                 if byte != c_lf:
- *                     self.mark_error()
- *                     return ErrorGroup.PartHeaders + 2             # <<<<<<<<<<<<<<
+ *                     return self.mark_error(ErrorCode.E_PART_HEADERS)             # <<<<<<<<<<<<<<
  * 
  *                 buffer_start = idx + 1
  */
         __Pyx_XDECREF(__pyx_r);
-        __pyx_t_6 = __Pyx_PyInt_From_long((__pyx_e_19streaming_form_data_7_parser_PartHeaders + 2)); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 401, __pyx_L1_error)
+        __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_PART_HEADERS); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 400, __pyx_L1_error)
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         __pyx_r = __pyx_t_6;
         __pyx_t_6 = 0;
@@ -17087,13 +16997,13 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  * 
  *             elif self.state == ParserState.PS_ENDING_ALL_HEADERS:
  *                 if byte != c_lf:             # <<<<<<<<<<<<<<
- *                     self.mark_error()
- *                     return ErrorGroup.PartHeaders + 2
+ *                     return self.mark_error(ErrorCode.E_PART_HEADERS)
+ * 
  */
       }
 
-      /* "streaming_form_data/_parser.pyx":403
- *                     return ErrorGroup.PartHeaders + 2
+      /* "streaming_form_data/_parser.pyx":402
+ *                     return self.mark_error(ErrorCode.E_PART_HEADERS)
  * 
  *                 buffer_start = idx + 1             # <<<<<<<<<<<<<<
  * 
@@ -17101,7 +17011,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       __pyx_v_buffer_start = (__pyx_v_idx + 1);
 
-      /* "streaming_form_data/_parser.pyx":405
+      /* "streaming_form_data/_parser.pyx":404
  *                 buffer_start = idx + 1
  * 
  *                 self.state = ParserState.PS_READING_BODY             # <<<<<<<<<<<<<<
@@ -17115,44 +17025,44 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  * 
  *             elif self.state == ParserState.PS_ENDING_ALL_HEADERS:             # <<<<<<<<<<<<<<
  *                 if byte != c_lf:
- *                     self.mark_error()
+ *                     return self.mark_error(ErrorCode.E_PART_HEADERS)
  */
       break;
       case __pyx_e_19streaming_form_data_7_parser_PS_READING_BODY:
 
-      /* "streaming_form_data/_parser.pyx":407
+      /* "streaming_form_data/_parser.pyx":406
  *                 self.state = ParserState.PS_READING_BODY
  *             elif self.state == ParserState.PS_READING_BODY:
  *                 self.delimiter_finder.feed(byte)             # <<<<<<<<<<<<<<
  *                 self.ender_finder.feed(byte)
  * 
  */
-      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_byte, 0); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 407, __pyx_L1_error)
+      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_byte, 0); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 406, __pyx_L1_error)
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       __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-      /* "streaming_form_data/_parser.pyx":408
+      /* "streaming_form_data/_parser.pyx":407
  *             elif self.state == ParserState.PS_READING_BODY:
  *                 self.delimiter_finder.feed(byte)
  *                 self.ender_finder.feed(byte)             # <<<<<<<<<<<<<<
  * 
  *                 if self.delimiter_finder.found():
  */
-      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_byte, 0); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 408, __pyx_L1_error)
+      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_byte, 0); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 407, __pyx_L1_error)
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       __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-      /* "streaming_form_data/_parser.pyx":410
+      /* "streaming_form_data/_parser.pyx":409
  *                 self.ender_finder.feed(byte)
  * 
  *                 if self.delimiter_finder.found():             # <<<<<<<<<<<<<<
  *                     self.state = ParserState.PS_READING_HEADER
  * 
  */
-      __pyx_t_9 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->found(__pyx_v_self->delimiter_finder, 0); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 410, __pyx_L1_error)
+      __pyx_t_9 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->found(__pyx_v_self->delimiter_finder, 0); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 409, __pyx_L1_error)
       if (__pyx_t_9) {
 
-        /* "streaming_form_data/_parser.pyx":411
+        /* "streaming_form_data/_parser.pyx":410
  * 
  *                 if self.delimiter_finder.found():
  *                     self.state = ParserState.PS_READING_HEADER             # <<<<<<<<<<<<<<
@@ -17161,52 +17071,41 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_READING_HEADER;
 
-        /* "streaming_form_data/_parser.pyx":413
+        /* "streaming_form_data/_parser.pyx":412
  *                     self.state = ParserState.PS_READING_HEADER
  * 
  *                     if idx + 1 < self.delimiter_length:             # <<<<<<<<<<<<<<
- *                         self.mark_error()
- *                         return ErrorGroup.Internal + 1
+ *                         return self.mark_error(ErrorCode.E_INTERNAL)
+ * 
  */
         __pyx_t_9 = ((__pyx_v_idx + 1) < __pyx_v_self->delimiter_length);
         if (__pyx_t_9) {
 
-          /* "streaming_form_data/_parser.pyx":414
- * 
- *                     if idx + 1 < self.delimiter_length:
- *                         self.mark_error()             # <<<<<<<<<<<<<<
- *                         return ErrorGroup.Internal + 1
+          /* "streaming_form_data/_parser.pyx":413
  * 
- */
-          __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 414, __pyx_L1_error)
-          __Pyx_GOTREF(__pyx_t_6);
-          __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
-
-          /* "streaming_form_data/_parser.pyx":415
  *                     if idx + 1 < self.delimiter_length:
- *                         self.mark_error()
- *                         return ErrorGroup.Internal + 1             # <<<<<<<<<<<<<<
+ *                         return self.mark_error(ErrorCode.E_INTERNAL)             # <<<<<<<<<<<<<<
  * 
  *                     match_start = idx + 1 - self.delimiter_length
  */
           __Pyx_XDECREF(__pyx_r);
-          __pyx_t_6 = __Pyx_PyInt_From_long((__pyx_e_19streaming_form_data_7_parser_Internal + 1)); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 415, __pyx_L1_error)
+          __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 413, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_6);
           __pyx_r = __pyx_t_6;
           __pyx_t_6 = 0;
           goto __pyx_L0;
 
-          /* "streaming_form_data/_parser.pyx":413
+          /* "streaming_form_data/_parser.pyx":412
  *                     self.state = ParserState.PS_READING_HEADER
  * 
  *                     if idx + 1 < self.delimiter_length:             # <<<<<<<<<<<<<<
- *                         self.mark_error()
- *                         return ErrorGroup.Internal + 1
+ *                         return self.mark_error(ErrorCode.E_INTERNAL)
+ * 
  */
         }
 
-        /* "streaming_form_data/_parser.pyx":417
- *                         return ErrorGroup.Internal + 1
+        /* "streaming_form_data/_parser.pyx":415
+ *                         return self.mark_error(ErrorCode.E_INTERNAL)
  * 
  *                     match_start = idx + 1 - self.delimiter_length             # <<<<<<<<<<<<<<
  * 
@@ -17214,7 +17113,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         __pyx_v_match_start = ((__pyx_v_idx + 1) - __pyx_v_self->delimiter_length);
 
-        /* "streaming_form_data/_parser.pyx":419
+        /* "streaming_form_data/_parser.pyx":417
  *                     match_start = idx + 1 - self.delimiter_length
  * 
  *                     if match_start >= buffer_start:             # <<<<<<<<<<<<<<
@@ -17224,7 +17123,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         __pyx_t_9 = (__pyx_v_match_start >= __pyx_v_buffer_start);
         if (__pyx_t_9) {
 
-          /* "streaming_form_data/_parser.pyx":420
+          /* "streaming_form_data/_parser.pyx":418
  * 
  *                     if match_start >= buffer_start:
  *                         try:             # <<<<<<<<<<<<<<
@@ -17240,20 +17139,20 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
             __Pyx_XGOTREF(__pyx_t_13);
             /*try:*/ {
 
-              /* "streaming_form_data/_parser.pyx":421
+              /* "streaming_form_data/_parser.pyx":419
  *                     if match_start >= buffer_start:
  *                         try:
  *                             self.on_body(chunk[buffer_start: match_start])             # <<<<<<<<<<<<<<
  *                         except Exception:
- *                             self.mark_error()
+ *                             self.mark_error(ErrorCode.E_INTERNAL)
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+              /* "streaming_form_data/_parser.pyx":444
  *                         except Exception:
- *                             self.mark_error()
+ *                             self.mark_error(ErrorCode.E_INTERNAL)
  *                             raise             # <<<<<<<<<<<<<<
  *                     else:
- *                         self.mark_error()
+ *                         return self.mark_error(ErrorCode.E_INTERNAL)
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               __Pyx_GIVEREF(__pyx_t_7);
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               __pyx_t_7 = 0; __pyx_t_5 = 0; __pyx_t_6 = 0; 
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-            /* "streaming_form_data/_parser.pyx":443
+            /* "streaming_form_data/_parser.pyx":440
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  *                     if match_start >= buffer_start:
  *                         try:             # <<<<<<<<<<<<<<
@@ -17673,7 +17550,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
             __pyx_L43_try_end:;
           }
 
-          /* "streaming_form_data/_parser.pyx":442
+          /* "streaming_form_data/_parser.pyx":439
  *                     match_start = idx + 1 - self.ender_length
  * 
  *                     if match_start >= buffer_start:             # <<<<<<<<<<<<<<
@@ -17683,27 +17560,16 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
           goto __pyx_L35;
         }
 
-        /* "streaming_form_data/_parser.pyx":449
+        /* "streaming_form_data/_parser.pyx":446
  *                             raise
  *                     else:
- *                         self.mark_error()             # <<<<<<<<<<<<<<
- *                         return ErrorGroup.Internal + 4
- * 
- */
-        /*else*/ {
-          __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 449, __pyx_L1_error)
-          __Pyx_GOTREF(__pyx_t_6);
-          __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
-
-          /* "streaming_form_data/_parser.pyx":450
- *                     else:
- *                         self.mark_error()
- *                         return ErrorGroup.Internal + 4             # <<<<<<<<<<<<<<
+ *                         return self.mark_error(ErrorCode.E_INTERNAL)             # <<<<<<<<<<<<<<
  * 
  *                     buffer_start = idx + 1
  */
+        /*else*/ {
           __Pyx_XDECREF(__pyx_r);
-          __pyx_t_6 = __Pyx_PyInt_From_long((__pyx_e_19streaming_form_data_7_parser_Internal + 4)); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 450, __pyx_L1_error)
+          __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 446, __pyx_L1_error)
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@@ -17711,8 +17577,8 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         }
         __pyx_L35:;
 
-        /* "streaming_form_data/_parser.pyx":452
- *                         return ErrorGroup.Internal + 4
+        /* "streaming_form_data/_parser.pyx":448
+ *                         return self.mark_error(ErrorCode.E_INTERNAL)
  * 
  *                     buffer_start = idx + 1             # <<<<<<<<<<<<<<
  * 
@@ -17720,14 +17586,14 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         __pyx_v_buffer_start = (__pyx_v_idx + 1);
 
-        /* "streaming_form_data/_parser.pyx":454
+        /* "streaming_form_data/_parser.pyx":450
  *                     buffer_start = idx + 1
  * 
  *                     self.unset_active_part()             # <<<<<<<<<<<<<<
  *                     self.ender_finder.reset()
  * 
  */
-        __pyx_t_5 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_unset_active_part); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 454, __pyx_L1_error)
+        __pyx_t_5 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_unset_active_part); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 450, __pyx_L1_error)
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         __pyx_t_7 = NULL;
         __pyx_t_8 = 0;
@@ -17747,24 +17613,24 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 454, __pyx_L1_error)
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         __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-        /* "streaming_form_data/_parser.pyx":455
+        /* "streaming_form_data/_parser.pyx":451
  * 
  *                     self.unset_active_part()
  *                     self.ender_finder.reset()             # <<<<<<<<<<<<<<
  * 
  *                 else:
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-        __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->reset(__pyx_v_self->ender_finder); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 455, __pyx_L1_error)
+        __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->reset(__pyx_v_self->ender_finder); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 451, __pyx_L1_error)
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         __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-        /* "streaming_form_data/_parser.pyx":434
+        /* "streaming_form_data/_parser.pyx":431
  *                     self.delimiter_finder.reset()
  * 
  *                 elif self.ender_finder.found():             # <<<<<<<<<<<<<<
@@ -17774,7 +17640,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         goto __pyx_L21;
       }
 
-      /* "streaming_form_data/_parser.pyx":463
+      /* "streaming_form_data/_parser.pyx":459
  *                     # middle of a potential delimiter.
  * 
  *                     if self.delimiter_finder.inactive():             # <<<<<<<<<<<<<<
@@ -17782,20 +17648,20 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  *                             chunk_ptr, idx + 1, chunk_len - 1
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       /*else*/ {
-        __pyx_t_9 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->inactive(__pyx_v_self->delimiter_finder, 0); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 463, __pyx_L1_error)
+        __pyx_t_9 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->inactive(__pyx_v_self->delimiter_finder, 0); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 459, __pyx_L1_error)
         if (__pyx_t_9) {
 
-          /* "streaming_form_data/_parser.pyx":464
+          /* "streaming_form_data/_parser.pyx":460
  * 
  *                     if self.delimiter_finder.inactive():
  *                         skip_count = self.rewind_fast_forward(             # <<<<<<<<<<<<<<
  *                             chunk_ptr, idx + 1, chunk_len - 1
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-          __pyx_t_14 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->rewind_fast_forward(__pyx_v_self, __pyx_v_chunk_ptr, (__pyx_v_idx + 1), (__pyx_v_chunk_len - 1)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 464, __pyx_L1_error)
+          __pyx_t_14 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->rewind_fast_forward(__pyx_v_self, __pyx_v_chunk_ptr, (__pyx_v_idx + 1), (__pyx_v_chunk_len - 1)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 460, __pyx_L1_error)
           __pyx_v_skip_count = __pyx_t_14;
 
-          /* "streaming_form_data/_parser.pyx":467
+          /* "streaming_form_data/_parser.pyx":463
  *                             chunk_ptr, idx + 1, chunk_len - 1
  *                         )
  *                         idx += skip_count             # <<<<<<<<<<<<<<
@@ -17804,7 +17670,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          /* "streaming_form_data/_parser.pyx":463
+          /* "streaming_form_data/_parser.pyx":459
  *                     # middle of a potential delimiter.
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  *                     if self.delimiter_finder.inactive():             # <<<<<<<<<<<<<<
@@ -17815,7 +17681,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       }
       __pyx_L21:;
 
-      /* "streaming_form_data/_parser.pyx":406
+      /* "streaming_form_data/_parser.pyx":405
  * 
  *                 self.state = ParserState.PS_READING_BODY
  *             elif self.state == ParserState.PS_READING_BODY:             # <<<<<<<<<<<<<<
@@ -17825,19 +17691,19 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       break;
       case __pyx_e_19streaming_form_data_7_parser_PS_END:
 
-      /* "streaming_form_data/_parser.pyx":470
+      /* "streaming_form_data/_parser.pyx":466
  * 
  *             elif self.state == ParserState.PS_END:
  *                 return 0             # <<<<<<<<<<<<<<
  *             else:
- *                 self.mark_error()
+ *                 return self.mark_error(ErrorCode.E_INTERNAL)
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       __Pyx_XDECREF(__pyx_r);
       __Pyx_INCREF(__pyx_int_0);
       __pyx_r = __pyx_int_0;
       goto __pyx_L0;
 
-      /* "streaming_form_data/_parser.pyx":469
+      /* "streaming_form_data/_parser.pyx":465
  *                         idx += skip_count
  * 
  *             elif self.state == ParserState.PS_END:             # <<<<<<<<<<<<<<
@@ -17847,26 +17713,15 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       break;
       default:
 
-      /* "streaming_form_data/_parser.pyx":472
+      /* "streaming_form_data/_parser.pyx":468
  *                 return 0
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- *                 self.mark_error()             # <<<<<<<<<<<<<<
- *                 return ErrorGroup.Internal + 5
- * 
- */
-      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 472, __pyx_L1_error)
-      __Pyx_GOTREF(__pyx_t_6);
-      __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
-
-      /* "streaming_form_data/_parser.pyx":473
- *             else:
- *                 self.mark_error()
- *                 return ErrorGroup.Internal + 5             # <<<<<<<<<<<<<<
+ *                 return self.mark_error(ErrorCode.E_INTERNAL)             # <<<<<<<<<<<<<<
  * 
  *             idx += 1
  */
       __Pyx_XDECREF(__pyx_r);
-      __pyx_t_6 = __Pyx_PyInt_From_long((__pyx_e_19streaming_form_data_7_parser_Internal + 5)); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 473, __pyx_L1_error)
+      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 468, __pyx_L1_error)
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@@ -17874,8 +17729,8 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       break;
     }
 
-    /* "streaming_form_data/_parser.pyx":475
- *                 return ErrorGroup.Internal + 5
+    /* "streaming_form_data/_parser.pyx":470
+ *                 return self.mark_error(ErrorCode.E_INTERNAL)
  * 
  *             idx += 1             # <<<<<<<<<<<<<<
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@@ -17884,96 +17739,74 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-  /* "streaming_form_data/_parser.pyx":477
+  /* "streaming_form_data/_parser.pyx":472
  *             idx += 1
  * 
  *         if idx != chunk_len:             # <<<<<<<<<<<<<<
- *             self.mark_error()
- *             return ErrorGroup.Internal + 6
+ *             return self.mark_error(ErrorCode.E_INTERNAL)
+ * 
  */
   __pyx_t_9 = (__pyx_v_idx != __pyx_v_chunk_len);
   if (__pyx_t_9) {
 
-    /* "streaming_form_data/_parser.pyx":478
+    /* "streaming_form_data/_parser.pyx":473
  * 
  *         if idx != chunk_len:
- *             self.mark_error()             # <<<<<<<<<<<<<<
- *             return ErrorGroup.Internal + 6
- * 
- */
-    __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 478, __pyx_L1_error)
-    __Pyx_GOTREF(__pyx_t_6);
-    __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
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-    /* "streaming_form_data/_parser.pyx":479
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- *             self.mark_error()
- *             return ErrorGroup.Internal + 6             # <<<<<<<<<<<<<<
+ *             return self.mark_error(ErrorCode.E_INTERNAL)             # <<<<<<<<<<<<<<
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  *         if buffer_start > chunk_len:
  */
     __Pyx_XDECREF(__pyx_r);
-    __pyx_t_6 = __Pyx_PyInt_From_long((__pyx_e_19streaming_form_data_7_parser_Internal + 6)); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 479, __pyx_L1_error)
+    __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 473, __pyx_L1_error)
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-    /* "streaming_form_data/_parser.pyx":477
+    /* "streaming_form_data/_parser.pyx":472
  *             idx += 1
  * 
  *         if idx != chunk_len:             # <<<<<<<<<<<<<<
- *             self.mark_error()
- *             return ErrorGroup.Internal + 6
+ *             return self.mark_error(ErrorCode.E_INTERNAL)
+ * 
  */
   }
 
-  /* "streaming_form_data/_parser.pyx":481
- *             return ErrorGroup.Internal + 6
+  /* "streaming_form_data/_parser.pyx":475
+ *             return self.mark_error(ErrorCode.E_INTERNAL)
  * 
  *         if buffer_start > chunk_len:             # <<<<<<<<<<<<<<
- *             self.mark_error()
- *             return ErrorGroup.Internal + 7
+ *             return self.mark_error(ErrorCode.E_INTERNAL)
+ * 
  */
   __pyx_t_9 = (__pyx_v_buffer_start > __pyx_v_chunk_len);
   if (__pyx_t_9) {
 
-    /* "streaming_form_data/_parser.pyx":482
+    /* "streaming_form_data/_parser.pyx":476
  * 
  *         if buffer_start > chunk_len:
- *             self.mark_error()             # <<<<<<<<<<<<<<
- *             return ErrorGroup.Internal + 7
- * 
- */
-    __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 482, __pyx_L1_error)
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-    __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
-
-    /* "streaming_form_data/_parser.pyx":483
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- *             self.mark_error()
- *             return ErrorGroup.Internal + 7             # <<<<<<<<<<<<<<
+ *             return self.mark_error(ErrorCode.E_INTERNAL)             # <<<<<<<<<<<<<<
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  *         if self.state == ParserState.PS_READING_BODY:
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-    __pyx_t_6 = __Pyx_PyInt_From_long((__pyx_e_19streaming_form_data_7_parser_Internal + 7)); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 483, __pyx_L1_error)
+    __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 476, __pyx_L1_error)
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     __pyx_r = __pyx_t_6;
     __pyx_t_6 = 0;
     goto __pyx_L0;
 
-    /* "streaming_form_data/_parser.pyx":481
- *             return ErrorGroup.Internal + 6
+    /* "streaming_form_data/_parser.pyx":475
+ *             return self.mark_error(ErrorCode.E_INTERNAL)
  * 
  *         if buffer_start > chunk_len:             # <<<<<<<<<<<<<<
- *             self.mark_error()
- *             return ErrorGroup.Internal + 7
+ *             return self.mark_error(ErrorCode.E_INTERNAL)
+ * 
  */
   }
 
-  /* "streaming_form_data/_parser.pyx":485
- *             return ErrorGroup.Internal + 7
+  /* "streaming_form_data/_parser.pyx":478
+ *             return self.mark_error(ErrorCode.E_INTERNAL)
  * 
  *         if self.state == ParserState.PS_READING_BODY:             # <<<<<<<<<<<<<<
  *             matched_length = max(
@@ -17982,25 +17815,25 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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   if (__pyx_t_9) {
 
-    /* "streaming_form_data/_parser.pyx":488
+    /* "streaming_form_data/_parser.pyx":481
  *             matched_length = max(
  *                 self.delimiter_finder.matched_length(),
  *                 self.ender_finder.matched_length()             # <<<<<<<<<<<<<<
  *             )
  *             match_start = idx - matched_length
  */
-    __pyx_t_14 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->matched_length(__pyx_v_self->ender_finder); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 488, __pyx_L1_error)
+    __pyx_t_14 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->matched_length(__pyx_v_self->ender_finder); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 481, __pyx_L1_error)
 
-    /* "streaming_form_data/_parser.pyx":487
+    /* "streaming_form_data/_parser.pyx":480
  *         if self.state == ParserState.PS_READING_BODY:
  *             matched_length = max(
  *                 self.delimiter_finder.matched_length(),             # <<<<<<<<<<<<<<
  *                 self.ender_finder.matched_length()
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-    __pyx_t_15 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->matched_length(__pyx_v_self->delimiter_finder); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 487, __pyx_L1_error)
+    __pyx_t_15 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->matched_length(__pyx_v_self->delimiter_finder); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 480, __pyx_L1_error)
 
-    /* "streaming_form_data/_parser.pyx":488
+    /* "streaming_form_data/_parser.pyx":481
  *             matched_length = max(
  *                 self.delimiter_finder.matched_length(),
  *                 self.ender_finder.matched_length()             # <<<<<<<<<<<<<<
@@ -18015,7 +17848,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
     }
     __pyx_v_matched_length = __pyx_t_16;
 
-    /* "streaming_form_data/_parser.pyx":490
+    /* "streaming_form_data/_parser.pyx":483
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  *             )
  *             match_start = idx - matched_length             # <<<<<<<<<<<<<<
@@ -18024,7 +17857,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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     __pyx_v_match_start = (__pyx_v_idx - __pyx_v_matched_length);
 
-    /* "streaming_form_data/_parser.pyx":492
+    /* "streaming_form_data/_parser.pyx":485
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@@ -18034,7 +17867,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-      /* "streaming_form_data/_parser.pyx":493
+      /* "streaming_form_data/_parser.pyx":486
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  *             if match_start >= buffer_start + c_min_file_body_chunk_size:
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@@ -18050,20 +17883,20 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          /* "streaming_form_data/_parser.pyx":494
+          /* "streaming_form_data/_parser.pyx":487
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  *                 try:
  *                     self.on_body(chunk[buffer_start: match_start])             # <<<<<<<<<<<<<<
  *                 except Exception:
- *                     self.mark_error()
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-          __pyx_t_5 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_on_body); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 494, __pyx_L51_error)
+          __pyx_t_5 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_on_body); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 487, __pyx_L51_error)
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-          __pyx_t_7 = PySequence_GetSlice(__pyx_v_chunk, __pyx_v_buffer_start, __pyx_v_match_start); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 494, __pyx_L51_error)
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@@ -18084,13 +17917,13 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-            if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 494, __pyx_L51_error)
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-          /* "streaming_form_data/_parser.pyx":493
+          /* "streaming_form_data/_parser.pyx":486
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@@ -18109,35 +17942,35 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-        /* "streaming_form_data/_parser.pyx":495
+        /* "streaming_form_data/_parser.pyx":488
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  *                     self.on_body(chunk[buffer_start: match_start])
  *                 except Exception:             # <<<<<<<<<<<<<<
- *                     self.mark_error()
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-          if (__Pyx_GetException(&__pyx_t_6, &__pyx_t_5, &__pyx_t_7) < 0) __PYX_ERR(0, 495, __pyx_L53_except_error)
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-          /* "streaming_form_data/_parser.pyx":496
+          /* "streaming_form_data/_parser.pyx":489
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- *                     self.mark_error()             # <<<<<<<<<<<<<<
+ *                     self.mark_error(E_INTERNAL)             # <<<<<<<<<<<<<<
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-          __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 496, __pyx_L53_except_error)
+          __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self, __pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 489, __pyx_L53_except_error)
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-          /* "streaming_form_data/_parser.pyx":497
+          /* "streaming_form_data/_parser.pyx":490
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- *                     self.mark_error()
+ *                     self.mark_error(E_INTERNAL)
  *                     raise             # <<<<<<<<<<<<<<
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  *                 buffer_start = match_start
@@ -18147,11 +17980,11 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          __PYX_ERR(0, 497, __pyx_L53_except_error)
+          __PYX_ERR(0, 490, __pyx_L53_except_error)
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         goto __pyx_L53_except_error;
 
-        /* "streaming_form_data/_parser.pyx":493
+        /* "streaming_form_data/_parser.pyx":486
  * 
  *             if match_start >= buffer_start + c_min_file_body_chunk_size:
  *                 try:             # <<<<<<<<<<<<<<
@@ -18167,7 +18000,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         __pyx_L56_try_end:;
       }
 
-      /* "streaming_form_data/_parser.pyx":499
+      /* "streaming_form_data/_parser.pyx":492
  *                     raise
  * 
  *                 buffer_start = match_start             # <<<<<<<<<<<<<<
@@ -18176,7 +18009,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       __pyx_v_buffer_start = __pyx_v_match_start;
 
-      /* "streaming_form_data/_parser.pyx":492
+      /* "streaming_form_data/_parser.pyx":485
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  *             if match_start >= buffer_start + c_min_file_body_chunk_size:             # <<<<<<<<<<<<<<
@@ -18185,8 +18018,8 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
     }
 
-    /* "streaming_form_data/_parser.pyx":485
- *             return ErrorGroup.Internal + 7
+    /* "streaming_form_data/_parser.pyx":478
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  * 
  *         if self.state == ParserState.PS_READING_BODY:             # <<<<<<<<<<<<<<
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@@ -18194,7 +18027,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
   }
 
-  /* "streaming_form_data/_parser.pyx":501
+  /* "streaming_form_data/_parser.pyx":494
  *                 buffer_start = match_start
  * 
  *         if idx - buffer_start > 0:             # <<<<<<<<<<<<<<
@@ -18204,7 +18037,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
   __pyx_t_9 = ((__pyx_v_idx - __pyx_v_buffer_start) > 0);
   if (__pyx_t_9) {
 
-    /* "streaming_form_data/_parser.pyx":502
+    /* "streaming_form_data/_parser.pyx":495
  * 
  *         if idx - buffer_start > 0:
  *             self._leftover_buffer = chunk[buffer_start: idx]             # <<<<<<<<<<<<<<
@@ -18213,9 +18046,9 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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     if (unlikely(__pyx_v_chunk == Py_None)) {
       PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-      __PYX_ERR(0, 502, __pyx_L1_error)
+      __PYX_ERR(0, 495, __pyx_L1_error)
     }
-    __pyx_t_7 = PySequence_GetSlice(__pyx_v_chunk, __pyx_v_buffer_start, __pyx_v_idx); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 502, __pyx_L1_error)
+    __pyx_t_7 = PySequence_GetSlice(__pyx_v_chunk, __pyx_v_buffer_start, __pyx_v_idx); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 495, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_7);
     __Pyx_GIVEREF(__pyx_t_7);
     __Pyx_GOTREF(__pyx_v_self->_leftover_buffer);
@@ -18223,7 +18056,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
     __pyx_v_self->_leftover_buffer = ((PyObject*)__pyx_t_7);
     __pyx_t_7 = 0;
 
-    /* "streaming_form_data/_parser.pyx":501
+    /* "streaming_form_data/_parser.pyx":494
  *                 buffer_start = match_start
  * 
  *         if idx - buffer_start > 0:             # <<<<<<<<<<<<<<
@@ -18232,7 +18065,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
   }
 
-  /* "streaming_form_data/_parser.pyx":504
+  /* "streaming_form_data/_parser.pyx":497
  *             self._leftover_buffer = chunk[buffer_start: idx]
  * 
  *         return 0             # <<<<<<<<<<<<<<
@@ -18244,7 +18077,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
   __pyx_r = __pyx_int_0;
   goto __pyx_L0;
 
-  /* "streaming_form_data/_parser.pyx":298
+  /* "streaming_form_data/_parser.pyx":306
  *         return (chunk, index)
  * 
  *     def _parse(self, bytes chunk, size_t index):             # <<<<<<<<<<<<<<
@@ -18271,7 +18104,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
   return __pyx_r;
 }
 
-/* "streaming_form_data/_parser.pyx":511
+/* "streaming_form_data/_parser.pyx":504
  *     # update Finder object states.
  * 
  *     cdef size_t rewind_fast_forward(             # <<<<<<<<<<<<<<
@@ -18293,7 +18126,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("rewind_fast_forward", 1);
 
-  /* "streaming_form_data/_parser.pyx":519
+  /* "streaming_form_data/_parser.pyx":512
  * 
  *         # we need at least 4 characters in buffer
  *         if pos_first + 3 > pos_last:             # <<<<<<<<<<<<<<
@@ -18303,7 +18136,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
   __pyx_t_1 = ((__pyx_v_pos_first + 3) > __pyx_v_pos_last);
   if (__pyx_t_1) {
 
-    /* "streaming_form_data/_parser.pyx":520
+    /* "streaming_form_data/_parser.pyx":513
  *         # we need at least 4 characters in buffer
  *         if pos_first + 3 > pos_last:
  *             return 0             # <<<<<<<<<<<<<<
@@ -18313,7 +18146,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
     __pyx_r = 0;
     goto __pyx_L0;
 
-    /* "streaming_form_data/_parser.pyx":519
+    /* "streaming_form_data/_parser.pyx":512
  * 
  *         # we need at least 4 characters in buffer
  *         if pos_first + 3 > pos_last:             # <<<<<<<<<<<<<<
@@ -18322,7 +18155,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
   }
 
-  /* "streaming_form_data/_parser.pyx":524
+  /* "streaming_form_data/_parser.pyx":517
  *         # calculate pointer to the first character of the buffer and the
  *         # pointer to a character after the end of the buffer
  *         ptr = chunk_ptr + pos_first + 3             # <<<<<<<<<<<<<<
@@ -18331,7 +18164,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
   __pyx_v_ptr = ((__pyx_v_chunk_ptr + __pyx_v_pos_first) + 3);
 
-  /* "streaming_form_data/_parser.pyx":525
+  /* "streaming_form_data/_parser.pyx":518
  *         # pointer to a character after the end of the buffer
  *         ptr = chunk_ptr + pos_first + 3
  *         ptr_end = chunk_ptr + pos_last + 1             # <<<<<<<<<<<<<<
@@ -18340,7 +18173,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
   __pyx_v_ptr_end = ((__pyx_v_chunk_ptr + __pyx_v_pos_last) + 1);
 
-  /* "streaming_form_data/_parser.pyx":526
+  /* "streaming_form_data/_parser.pyx":519
  *         ptr = chunk_ptr + pos_first + 3
  *         ptr_end = chunk_ptr + pos_last + 1
  *         skipped = 0             # <<<<<<<<<<<<<<
@@ -18349,7 +18182,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
   __pyx_v_skipped = 0;
 
-  /* "streaming_form_data/_parser.pyx":533
+  /* "streaming_form_data/_parser.pyx":526
  *         # is found.
  * 
  *         while True:             # <<<<<<<<<<<<<<
@@ -18358,7 +18191,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
   while (1) {
 
-    /* "streaming_form_data/_parser.pyx":534
+    /* "streaming_form_data/_parser.pyx":527
  * 
  *         while True:
  *             if ptr >= ptr_end:             # <<<<<<<<<<<<<<
@@ -18368,7 +18201,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
     __pyx_t_1 = (__pyx_v_ptr >= __pyx_v_ptr_end);
     if (__pyx_t_1) {
 
-      /* "streaming_form_data/_parser.pyx":537
+      /* "streaming_form_data/_parser.pyx":530
  *                 # normalize pointer value because we could jump few characters
  *                 # past the buffer end
  *                 ptr = ptr_end - 1             # <<<<<<<<<<<<<<
@@ -18377,7 +18210,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
       __pyx_v_ptr = (__pyx_v_ptr_end - 1);
 
-      /* "streaming_form_data/_parser.pyx":542
+      /* "streaming_form_data/_parser.pyx":535
  *                 # keep up to 3 characters in the buffer until next chunk
  *                 # guess we will skip all characters in the buffer
  *                 skipped = pos_last - pos_first + 1             # <<<<<<<<<<<<<<
@@ -18386,7 +18219,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
       __pyx_v_skipped = ((__pyx_v_pos_last - __pyx_v_pos_first) + 1);
 
-      /* "streaming_form_data/_parser.pyx":544
+      /* "streaming_form_data/_parser.pyx":537
  *                 skipped = pos_last - pos_first + 1
  * 
  *                 if ptr[0] == c_cr:             # <<<<<<<<<<<<<<
@@ -18396,7 +18229,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       __pyx_t_1 = ((__pyx_v_ptr[0]) == __pyx_v_19streaming_form_data_7_parser_c_cr);
       if (__pyx_t_1) {
 
-        /* "streaming_form_data/_parser.pyx":545
+        /* "streaming_form_data/_parser.pyx":538
  * 
  *                 if ptr[0] == c_cr:
  *                     skipped = skipped - 1             # <<<<<<<<<<<<<<
@@ -18405,7 +18238,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
         __pyx_v_skipped = (__pyx_v_skipped - 1);
 
-        /* "streaming_form_data/_parser.pyx":544
+        /* "streaming_form_data/_parser.pyx":537
  *                 skipped = pos_last - pos_first + 1
  * 
  *                 if ptr[0] == c_cr:             # <<<<<<<<<<<<<<
@@ -18415,7 +18248,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
         goto __pyx_L7;
       }
 
-      /* "streaming_form_data/_parser.pyx":546
+      /* "streaming_form_data/_parser.pyx":539
  *                 if ptr[0] == c_cr:
  *                     skipped = skipped - 1
  *                 elif ptr[0] == c_lf and ptr[-1] == c_cr:             # <<<<<<<<<<<<<<
@@ -18433,7 +18266,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       __pyx_L8_bool_binop_done:;
       if (__pyx_t_1) {
 
-        /* "streaming_form_data/_parser.pyx":547
+        /* "streaming_form_data/_parser.pyx":540
  *                     skipped = skipped - 1
  *                 elif ptr[0] == c_lf and ptr[-1] == c_cr:
  *                     skipped = skipped - 2             # <<<<<<<<<<<<<<
@@ -18442,7 +18275,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
         __pyx_v_skipped = (__pyx_v_skipped - 2);
 
-        /* "streaming_form_data/_parser.pyx":546
+        /* "streaming_form_data/_parser.pyx":539
  *                 if ptr[0] == c_cr:
  *                     skipped = skipped - 1
  *                 elif ptr[0] == c_lf and ptr[-1] == c_cr:             # <<<<<<<<<<<<<<
@@ -18452,7 +18285,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
         goto __pyx_L7;
       }
 
-      /* "streaming_form_data/_parser.pyx":549
+      /* "streaming_form_data/_parser.pyx":542
  *                     skipped = skipped - 2
  *                 elif (
  *                     ptr[0] == c_hyphen             # <<<<<<<<<<<<<<
@@ -18466,7 +18299,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
         goto __pyx_L10_bool_binop_done;
       }
 
-      /* "streaming_form_data/_parser.pyx":550
+      /* "streaming_form_data/_parser.pyx":543
  *                 elif (
  *                     ptr[0] == c_hyphen
  *                     and ptr[-1] == c_lf             # <<<<<<<<<<<<<<
@@ -18480,7 +18313,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
         goto __pyx_L10_bool_binop_done;
       }
 
-      /* "streaming_form_data/_parser.pyx":551
+      /* "streaming_form_data/_parser.pyx":544
  *                     ptr[0] == c_hyphen
  *                     and ptr[-1] == c_lf
  *                     and ptr[-2] == c_cr             # <<<<<<<<<<<<<<
@@ -18491,7 +18324,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       __pyx_t_1 = __pyx_t_2;
       __pyx_L10_bool_binop_done:;
 
-      /* "streaming_form_data/_parser.pyx":548
+      /* "streaming_form_data/_parser.pyx":541
  *                 elif ptr[0] == c_lf and ptr[-1] == c_cr:
  *                     skipped = skipped - 2
  *                 elif (             # <<<<<<<<<<<<<<
@@ -18500,7 +18333,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
       if (__pyx_t_1) {
 
-        /* "streaming_form_data/_parser.pyx":553
+        /* "streaming_form_data/_parser.pyx":546
  *                     and ptr[-2] == c_cr
  *                 ):
  *                     skipped = skipped - 3             # <<<<<<<<<<<<<<
@@ -18509,7 +18342,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
         __pyx_v_skipped = (__pyx_v_skipped - 3);
 
-        /* "streaming_form_data/_parser.pyx":548
+        /* "streaming_form_data/_parser.pyx":541
  *                 elif ptr[0] == c_lf and ptr[-1] == c_cr:
  *                     skipped = skipped - 2
  *                 elif (             # <<<<<<<<<<<<<<
@@ -18519,7 +18352,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       }
       __pyx_L7:;
 
-      /* "streaming_form_data/_parser.pyx":554
+      /* "streaming_form_data/_parser.pyx":547
  *                 ):
  *                     skipped = skipped - 3
  *                 break             # <<<<<<<<<<<<<<
@@ -18528,7 +18361,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
       goto __pyx_L5_break;
 
-      /* "streaming_form_data/_parser.pyx":534
+      /* "streaming_form_data/_parser.pyx":527
  * 
  *         while True:
  *             if ptr >= ptr_end:             # <<<<<<<<<<<<<<
@@ -18537,7 +18370,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
     }
 
-    /* "streaming_form_data/_parser.pyx":556
+    /* "streaming_form_data/_parser.pyx":549
  *                 break
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@@ -18547,7 +18380,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
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     if (__pyx_t_1) {
 
-      /* "streaming_form_data/_parser.pyx":557
+      /* "streaming_form_data/_parser.pyx":550
  * 
  *             if ptr[0] != c_hyphen:
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@@ -18556,7 +18389,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
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-      /* "streaming_form_data/_parser.pyx":556
+      /* "streaming_form_data/_parser.pyx":549
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  *             if ptr[0] != c_hyphen:             # <<<<<<<<<<<<<<
@@ -18566,7 +18399,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       goto __pyx_L13;
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-    /* "streaming_form_data/_parser.pyx":559
+    /* "streaming_form_data/_parser.pyx":552
  *                 ptr += 2
  *             else:
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-        /* "streaming_form_data/_parser.pyx":560
+        /* "streaming_form_data/_parser.pyx":553
  *             else:
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@@ -18586,7 +18419,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
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-        /* "streaming_form_data/_parser.pyx":559
+        /* "streaming_form_data/_parser.pyx":552
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         goto __pyx_L14;
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-      /* "streaming_form_data/_parser.pyx":562
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-          /* "streaming_form_data/_parser.pyx":563
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  *                         self.delimiter_finder.feed(c_lf)
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-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->reset(__pyx_v_self->delimiter_finder); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 563, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->reset(__pyx_v_self->delimiter_finder); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 556, __pyx_L1_error)
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           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":564
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  *                         self.delimiter_finder.feed(c_cr)             # <<<<<<<<<<<<<<
  *                         self.delimiter_finder.feed(c_lf)
  *                         self.delimiter_finder.feed(c_hyphen)
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-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_cr, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 564, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_cr, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 557, __pyx_L1_error)
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-          /* "streaming_form_data/_parser.pyx":565
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  *                         self.delimiter_finder.feed(c_cr)
  *                         self.delimiter_finder.feed(c_lf)             # <<<<<<<<<<<<<<
  *                         self.delimiter_finder.feed(c_hyphen)
  *                         self.delimiter_finder.feed(c_hyphen)
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-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_lf, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 565, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_lf, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 558, __pyx_L1_error)
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-          /* "streaming_form_data/_parser.pyx":566
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  *                         self.delimiter_finder.feed(c_lf)
  *                         self.delimiter_finder.feed(c_hyphen)             # <<<<<<<<<<<<<<
  *                         self.delimiter_finder.feed(c_hyphen)
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-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 566, __pyx_L1_error)
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  *                         self.ender_finder.reset()
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-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 567, __pyx_L1_error)
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  *                         self.ender_finder.reset()             # <<<<<<<<<<<<<<
  *                         self.ender_finder.feed(c_cr)
  *                         self.ender_finder.feed(c_lf)
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-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->reset(__pyx_v_self->ender_finder); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 569, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->reset(__pyx_v_self->ender_finder); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 562, __pyx_L1_error)
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-          /* "streaming_form_data/_parser.pyx":570
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  *                         self.ender_finder.reset()
  *                         self.ender_finder.feed(c_cr)             # <<<<<<<<<<<<<<
  *                         self.ender_finder.feed(c_lf)
  *                         self.ender_finder.feed(c_hyphen)
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-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_cr, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 570, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_cr, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 563, __pyx_L1_error)
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-          /* "streaming_form_data/_parser.pyx":571
+          /* "streaming_form_data/_parser.pyx":564
  *                         self.ender_finder.reset()
  *                         self.ender_finder.feed(c_cr)
  *                         self.ender_finder.feed(c_lf)             # <<<<<<<<<<<<<<
  *                         self.ender_finder.feed(c_hyphen)
  *                         self.ender_finder.feed(c_hyphen)
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_lf, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 571, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_lf, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 564, __pyx_L1_error)
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-          /* "streaming_form_data/_parser.pyx":572
+          /* "streaming_form_data/_parser.pyx":565
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  *                         self.ender_finder.feed(c_lf)
  *                         self.ender_finder.feed(c_hyphen)             # <<<<<<<<<<<<<<
  *                         self.ender_finder.feed(c_hyphen)
  * 
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 572, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 565, __pyx_L1_error)
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           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":573
+          /* "streaming_form_data/_parser.pyx":566
  *                         self.ender_finder.feed(c_lf)
  *                         self.ender_finder.feed(c_hyphen)
  *                         self.ender_finder.feed(c_hyphen)             # <<<<<<<<<<<<<<
  * 
  *                         skipped = (ptr - chunk_ptr) - pos_first + 1
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 573, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 566, __pyx_L1_error)
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-          /* "streaming_form_data/_parser.pyx":575
+          /* "streaming_form_data/_parser.pyx":568
  *                         self.ender_finder.feed(c_hyphen)
  * 
  *                         skipped = (ptr - chunk_ptr) - pos_first + 1             # <<<<<<<<<<<<<<
@@ -18734,7 +18567,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
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-          /* "streaming_form_data/_parser.pyx":577
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  *                         break             # <<<<<<<<<<<<<<
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           goto __pyx_L5_break;
 
-          /* "streaming_form_data/_parser.pyx":562
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@@ -18752,7 +18585,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
         }
 
-        /* "streaming_form_data/_parser.pyx":578
+        /* "streaming_form_data/_parser.pyx":571
  * 
  *                         break
  *                     ptr += 4             # <<<<<<<<<<<<<<
@@ -18767,17 +18600,17 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
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   __pyx_L5_break:;
 
-  /* "streaming_form_data/_parser.pyx":580
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  *                     ptr += 4
  * 
  *         return skipped             # <<<<<<<<<<<<<<
  * 
- *     cdef mark_error(self):
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   __pyx_r = __pyx_v_skipped;
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-  /* "streaming_form_data/_parser.pyx":511
+  /* "streaming_form_data/_parser.pyx":504
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  *     cdef size_t rewind_fast_forward(             # <<<<<<<<<<<<<<
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 }
 
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- *     cdef mark_error(self):             # <<<<<<<<<<<<<<
+ *     cdef mark_error(self, ErrorCode error_code):             # <<<<<<<<<<<<<<
  *         self.state = ParserState.PS_ERROR
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+ *         self.error_code = error_code
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-static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser_mark_error(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self) {
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-  /* "streaming_form_data/_parser.pyx":583
+  /* "streaming_form_data/_parser.pyx":576
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+ *     cdef mark_error(self, ErrorCode error_code):
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   __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_ERROR;
 
-  /* "streaming_form_data/_parser.pyx":585
+  /* "streaming_form_data/_parser.pyx":577
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+ *         self.error_code = error_code             # <<<<<<<<<<<<<<
+ * 
+ *         if self.active_part:
+ */
+  __pyx_v_self->error_code = __pyx_v_error_code;
+
+  /* "streaming_form_data/_parser.pyx":579
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  *         if self.active_part:             # <<<<<<<<<<<<<<
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-    /* "streaming_form_data/_parser.pyx":586
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+    __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_v_self->active_part, __pyx_n_s_finish); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 580, __pyx_L1_error)
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-    /* "streaming_form_data/_parser.pyx":585
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+    /* "streaming_form_data/_parser.pyx":579
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-  /* "streaming_form_data/_parser.pyx":582
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+ *     cdef mark_error(self, ErrorCode error_code):             # <<<<<<<<<<<<<<
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+ *         self.error_code = error_code
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-  __pyx_v__dict = __pyx_t_5;
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+ *     state = (self._leftover_buffer, self.active_part, self.default_part, self.delimiter_finder, self.delimiter_length, self.ender_finder, self.ender_length, self.error_code, self.expected_parts, self.state, self.strict, self.unexpected_part_name)
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-  __pyx_t_6 = (__pyx_v__dict != Py_None);
-  if (__pyx_t_6) {
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-    __pyx_r = __pyx_t_3;
-    __pyx_t_3 = 0;
+    __pyx_t_6 = 0;
+    __pyx_r = __pyx_t_4;
+    __pyx_t_4 = 0;
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     /* "(tree fragment)":12
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- *         return __pyx_unpickle__Parser, (type(self), 0x428af85, None), state
+ *         return __pyx_unpickle__Parser, (type(self), 0x5d4e824, None), state
  *     else:
  */
   }
 
   /* "(tree fragment)":15
- *         return __pyx_unpickle__Parser, (type(self), 0x428af85, None), state
+ *         return __pyx_unpickle__Parser, (type(self), 0x5d4e824, None), state
  *     else:
- *         return __pyx_unpickle__Parser, (type(self), 0x428af85, state)             # <<<<<<<<<<<<<<
+ *         return __pyx_unpickle__Parser, (type(self), 0x5d4e824, state)             # <<<<<<<<<<<<<<
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-    __Pyx_GOTREF(__pyx_t_5);
+    __Pyx_GetModuleGlobalName(__pyx_t_4, __pyx_n_s_pyx_unpickle__Parser); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 15, __pyx_L1_error)
+    __Pyx_GOTREF(__pyx_t_4);
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+    __Pyx_GIVEREF(__pyx_int_97839140);
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-    __pyx_t_3 = 0;
-    __pyx_t_5 = 0;
-    __pyx_r = __pyx_t_4;
+    if (__Pyx_PyTuple_SET_ITEM(__pyx_t_6, 2, __pyx_v_state)) __PYX_ERR(1, 15, __pyx_L1_error);
+    __pyx_t_5 = PyTuple_New(2); if (unlikely(!__pyx_t_5)) __PYX_ERR(1, 15, __pyx_L1_error)
+    __Pyx_GOTREF(__pyx_t_5);
+    __Pyx_GIVEREF(__pyx_t_4);
+    if (__Pyx_PyTuple_SET_ITEM(__pyx_t_5, 0, __pyx_t_4)) __PYX_ERR(1, 15, __pyx_L1_error);
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+    __pyx_t_6 = 0;
+    __pyx_r = __pyx_t_5;
+    __pyx_t_5 = 0;
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@@ -19340,6 +19188,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_26__reduce_cyt
   __Pyx_XDECREF(__pyx_t_3);
   __Pyx_XDECREF(__pyx_t_4);
   __Pyx_XDECREF(__pyx_t_5);
+  __Pyx_XDECREF(__pyx_t_6);
   __Pyx_AddTraceback("streaming_form_data._parser._Parser.__reduce_cython__", __pyx_clineno, __pyx_lineno, __pyx_filename);
   __pyx_r = NULL;
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@@ -19352,7 +19201,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_26__reduce_cyt
 
 /* "(tree fragment)":16
  *     else:
- *         return __pyx_unpickle__Parser, (type(self), 0x428af85, state)
+ *         return __pyx_unpickle__Parser, (type(self), 0x5d4e824, state)
  * def __setstate_cython__(self, __pyx_state):             # <<<<<<<<<<<<<<
  *     __pyx_unpickle__Parser__set_state(self, __pyx_state)
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@@ -19463,7 +19312,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_28__setstate_c
   __Pyx_RefNannySetupContext("__setstate_cython__", 1);
 
   /* "(tree fragment)":17
- *         return __pyx_unpickle__Parser, (type(self), 0x428af85, state)
+ *         return __pyx_unpickle__Parser, (type(self), 0x5d4e824, state)
  * def __setstate_cython__(self, __pyx_state):
  *     __pyx_unpickle__Parser__set_state(self, __pyx_state)             # <<<<<<<<<<<<<<
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@@ -19474,7 +19323,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_28__setstate_c
 
   /* "(tree fragment)":16
  *     else:
- *         return __pyx_unpickle__Parser, (type(self), 0x428af85, state)
+ *         return __pyx_unpickle__Parser, (type(self), 0x5d4e824, state)
  * def __setstate_cython__(self, __pyx_state):             # <<<<<<<<<<<<<<
  *     __pyx_unpickle__Parser__set_state(self, __pyx_state)
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@@ -21037,9 +20886,9 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_6__pyx_unpickle__Parser
   /* "(tree fragment)":4
  *     cdef object __pyx_PickleError
  *     cdef object __pyx_result
- *     if __pyx_checksum not in (0x428af85, 0xaf18744, 0x7bae3b8):             # <<<<<<<<<<<<<<
+ *     if __pyx_checksum not in (0x5d4e824, 0xc08542c, 0x017e085):             # <<<<<<<<<<<<<<
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x428af85, 0xaf18744, 0x7bae3b8) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
+ *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x5d4e824, 0xc08542c, 0x017e085) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, error_code, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
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   __pyx_t_1 = __Pyx_PyInt_From_long(__pyx_v___pyx_checksum); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 4, __pyx_L1_error)
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@@ -21049,9 +20898,9 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_6__pyx_unpickle__Parser
 
     /* "(tree fragment)":5
  *     cdef object __pyx_result
- *     if __pyx_checksum not in (0x428af85, 0xaf18744, 0x7bae3b8):
+ *     if __pyx_checksum not in (0x5d4e824, 0xc08542c, 0x017e085):
  *         from pickle import PickleError as __pyx_PickleError             # <<<<<<<<<<<<<<
- *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x428af85, 0xaf18744, 0x7bae3b8) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
+ *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x5d4e824, 0xc08542c, 0x017e085) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, error_code, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
  *     __pyx_result = _Parser.__new__(__pyx_type)
  */
     __pyx_t_1 = PyList_New(1); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 5, __pyx_L1_error)
@@ -21070,9 +20919,9 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_6__pyx_unpickle__Parser
     __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
     /* "(tree fragment)":6
- *     if __pyx_checksum not in (0x428af85, 0xaf18744, 0x7bae3b8):
+ *     if __pyx_checksum not in (0x5d4e824, 0xc08542c, 0x017e085):
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x428af85, 0xaf18744, 0x7bae3b8) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum             # <<<<<<<<<<<<<<
+ *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x5d4e824, 0xc08542c, 0x017e085) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, error_code, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum             # <<<<<<<<<<<<<<
  *     __pyx_result = _Parser.__new__(__pyx_type)
  *     if __pyx_state is not None:
  */
@@ -21088,15 +20937,15 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_6__pyx_unpickle__Parser
     /* "(tree fragment)":4
  *     cdef object __pyx_PickleError
  *     cdef object __pyx_result
- *     if __pyx_checksum not in (0x428af85, 0xaf18744, 0x7bae3b8):             # <<<<<<<<<<<<<<
+ *     if __pyx_checksum not in (0x5d4e824, 0xc08542c, 0x017e085):             # <<<<<<<<<<<<<<
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x428af85, 0xaf18744, 0x7bae3b8) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
+ *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x5d4e824, 0xc08542c, 0x017e085) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, error_code, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
  */
   }
 
   /* "(tree fragment)":7
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x428af85, 0xaf18744, 0x7bae3b8) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
+ *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x5d4e824, 0xc08542c, 0x017e085) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, error_code, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
  *     __pyx_result = _Parser.__new__(__pyx_type)             # <<<<<<<<<<<<<<
  *     if __pyx_state is not None:
  *         __pyx_unpickle__Parser__set_state(<_Parser> __pyx_result, __pyx_state)
@@ -21129,7 +20978,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_6__pyx_unpickle__Parser
   __pyx_t_1 = 0;
 
   /* "(tree fragment)":8
- *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x428af85, 0xaf18744, 0x7bae3b8) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
+ *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x5d4e824, 0xc08542c, 0x017e085) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, error_code, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
  *     __pyx_result = _Parser.__new__(__pyx_type)
  *     if __pyx_state is not None:             # <<<<<<<<<<<<<<
  *         __pyx_unpickle__Parser__set_state(<_Parser> __pyx_result, __pyx_state)
@@ -21151,7 +21000,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_6__pyx_unpickle__Parser
     __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
     /* "(tree fragment)":8
- *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x428af85, 0xaf18744, 0x7bae3b8) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
+ *         raise __pyx_PickleError, "Incompatible checksums (0x%x vs (0x5d4e824, 0xc08542c, 0x017e085) = (_leftover_buffer, active_part, default_part, delimiter_finder, delimiter_length, ender_finder, ender_length, error_code, expected_parts, state, strict, unexpected_part_name))" % __pyx_checksum
  *     __pyx_result = _Parser.__new__(__pyx_type)
  *     if __pyx_state is not None:             # <<<<<<<<<<<<<<
  *         __pyx_unpickle__Parser__set_state(<_Parser> __pyx_result, __pyx_state)
@@ -21164,7 +21013,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_6__pyx_unpickle__Parser
  *         __pyx_unpickle__Parser__set_state(<_Parser> __pyx_result, __pyx_state)
  *     return __pyx_result             # <<<<<<<<<<<<<<
  * cdef __pyx_unpickle__Parser__set_state(_Parser __pyx_result, tuple __pyx_state):
- *     __pyx_result._leftover_buffer = __pyx_state[0]; __pyx_result.active_part = __pyx_state[1]; __pyx_result.default_part = __pyx_state[2]; __pyx_result.delimiter_finder = __pyx_state[3]; __pyx_result.delimiter_length = __pyx_state[4]; __pyx_result.ender_finder = __pyx_state[5]; __pyx_result.ender_length = __pyx_state[6]; __pyx_result.expected_parts = __pyx_state[7]; __pyx_result.state = __pyx_state[8]; __pyx_result.strict = __pyx_state[9]; __pyx_result.unexpected_part_name = __pyx_state[10]
+ *     __pyx_result._leftover_buffer = __pyx_state[0]; __pyx_result.active_part = __pyx_state[1]; __pyx_result.default_part = __pyx_state[2]; __pyx_result.delimiter_finder = __pyx_state[3]; __pyx_result.delimiter_length = __pyx_state[4]; __pyx_result.ender_finder = __pyx_state[5]; __pyx_result.ender_length = __pyx_state[6]; __pyx_result.error_code = __pyx_state[7]; __pyx_result.expected_parts = __pyx_state[8]; __pyx_result.state = __pyx_state[9]; __pyx_result.strict = __pyx_state[10]; __pyx_result.unexpected_part_name = __pyx_state[11]
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   __Pyx_XDECREF(__pyx_r);
   __Pyx_INCREF(__pyx_v___pyx_result);
@@ -21196,8 +21045,8 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_6__pyx_unpickle__Parser
  *         __pyx_unpickle__Parser__set_state(<_Parser> __pyx_result, __pyx_state)
  *     return __pyx_result
  * cdef __pyx_unpickle__Parser__set_state(_Parser __pyx_result, tuple __pyx_state):             # <<<<<<<<<<<<<<
- *     __pyx_result._leftover_buffer = __pyx_state[0]; __pyx_result.active_part = __pyx_state[1]; __pyx_result.default_part = __pyx_state[2]; __pyx_result.delimiter_finder = __pyx_state[3]; __pyx_result.delimiter_length = __pyx_state[4]; __pyx_result.ender_finder = __pyx_state[5]; __pyx_result.ender_length = __pyx_state[6]; __pyx_result.expected_parts = __pyx_state[7]; __pyx_result.state = __pyx_state[8]; __pyx_result.strict = __pyx_state[9]; __pyx_result.unexpected_part_name = __pyx_state[10]
- *     if len(__pyx_state) > 11 and hasattr(__pyx_result, '__dict__'):
+ *     __pyx_result._leftover_buffer = __pyx_state[0]; __pyx_result.active_part = __pyx_state[1]; __pyx_result.default_part = __pyx_state[2]; __pyx_result.delimiter_finder = __pyx_state[3]; __pyx_result.delimiter_length = __pyx_state[4]; __pyx_result.ender_finder = __pyx_state[5]; __pyx_result.ender_length = __pyx_state[6]; __pyx_result.error_code = __pyx_state[7]; __pyx_result.expected_parts = __pyx_state[8]; __pyx_result.state = __pyx_state[9]; __pyx_result.strict = __pyx_state[10]; __pyx_result.unexpected_part_name = __pyx_state[11]
+ *     if len(__pyx_state) > 12 and hasattr(__pyx_result, '__dict__'):
  */
 
 static PyObject *__pyx_f_19streaming_form_data_7_parser___pyx_unpickle__Parser__set_state(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v___pyx_result, PyObject *__pyx_v___pyx_state) {
@@ -21205,14 +21054,15 @@ static PyObject *__pyx_f_19streaming_form_data_7_parser___pyx_unpickle__Parser__
   __Pyx_RefNannyDeclarations
   PyObject *__pyx_t_1 = NULL;
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-  enum __pyx_t_19streaming_form_data_7_parser_ParserState __pyx_t_3;
-  int __pyx_t_4;
-  Py_ssize_t __pyx_t_5;
-  int __pyx_t_6;
-  PyObject *__pyx_t_7 = NULL;
+  enum __pyx_t_19streaming_form_data_7_parser_ErrorCode __pyx_t_3;
+  enum __pyx_t_19streaming_form_data_7_parser_ParserState __pyx_t_4;
+  int __pyx_t_5;
+  Py_ssize_t __pyx_t_6;
+  int __pyx_t_7;
   PyObject *__pyx_t_8 = NULL;
   PyObject *__pyx_t_9 = NULL;
-  int __pyx_t_10;
+  PyObject *__pyx_t_10 = NULL;
+  int __pyx_t_11;
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
@@ -21221,9 +21071,9 @@ static PyObject *__pyx_f_19streaming_form_data_7_parser___pyx_unpickle__Parser__
   /* "(tree fragment)":12
  *     return __pyx_result
  * cdef __pyx_unpickle__Parser__set_state(_Parser __pyx_result, tuple __pyx_state):
- *     __pyx_result._leftover_buffer = __pyx_state[0]; __pyx_result.active_part = __pyx_state[1]; __pyx_result.default_part = __pyx_state[2]; __pyx_result.delimiter_finder = __pyx_state[3]; __pyx_result.delimiter_length = __pyx_state[4]; __pyx_result.ender_finder = __pyx_state[5]; __pyx_result.ender_length = __pyx_state[6]; __pyx_result.expected_parts = __pyx_state[7]; __pyx_result.state = __pyx_state[8]; __pyx_result.strict = __pyx_state[9]; __pyx_result.unexpected_part_name = __pyx_state[10]             # <<<<<<<<<<<<<<
- *     if len(__pyx_state) > 11 and hasattr(__pyx_result, '__dict__'):
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@@ -23544,7 +23407,6 @@ static int __Pyx_CreateStringTabAndInitStrings(void) {
     {&__pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4, __pyx_k_Incompatible_checksums_0x_x_vs_0_4, sizeof(__pyx_k_Incompatible_checksums_0x_x_vs_0_4), 0, 0, 1, 0},
     {&__pyx_n_s_IntEnum, __pyx_k_IntEnum, sizeof(__pyx_k_IntEnum), 0, 0, 1, 1},
     {&__pyx_n_s_IntFlag, __pyx_k_IntFlag, sizeof(__pyx_k_IntFlag), 0, 0, 1, 1},
-    {&__pyx_n_s_Internal, __pyx_k_Internal, sizeof(__pyx_k_Internal), 0, 0, 1, 1},
     {&__pyx_n_s_NullTarget, __pyx_k_NullTarget, sizeof(__pyx_k_NullTarget), 0, 0, 1, 1},
     {&__pyx_n_s_OrderedDict, __pyx_k_OrderedDict, sizeof(__pyx_k_OrderedDict), 0, 0, 1, 1},
     {&__pyx_n_s_Parser, __pyx_k_Parser, sizeof(__pyx_k_Parser), 0, 0, 1, 1},
@@ -23562,7 +23424,6 @@ static int __Pyx_CreateStringTabAndInitStrings(void) {
     {&__pyx_n_s_Parser_set_active_part, __pyx_k_Parser_set_active_part, sizeof(__pyx_k_Parser_set_active_part), 0, 0, 1, 1},
     {&__pyx_n_s_Parser_unset_active_part, __pyx_k_Parser_unset_active_part, sizeof(__pyx_k_Parser_unset_active_part), 0, 0, 1, 1},
     {&__pyx_n_s_Part, __pyx_k_Part, sizeof(__pyx_k_Part), 0, 0, 1, 1},
-    {&__pyx_n_s_PartHeaders, __pyx_k_PartHeaders, sizeof(__pyx_k_PartHeaders), 0, 0, 1, 1},
     {&__pyx_n_s_Part___reduce_cython, __pyx_k_Part___reduce_cython, sizeof(__pyx_k_Part___reduce_cython), 0, 0, 1, 1},
     {&__pyx_n_s_Part___setstate_cython, __pyx_k_Part___setstate_cython, sizeof(__pyx_k_Part___setstate_cython), 0, 0, 1, 1},
     {&__pyx_n_s_Part_add_target, __pyx_k_Part_add_target, sizeof(__pyx_k_Part_add_target), 0, 0, 1, 1},
@@ -23582,7 +23443,6 @@ static int __Pyx_CreateStringTabAndInitStrings(void) {
     {&__pyx_n_s_Pyx_FlagBase___new, __pyx_k_Pyx_FlagBase___new, sizeof(__pyx_k_Pyx_FlagBase___new), 0, 0, 1, 1},
     {&__pyx_n_s_Pyx_FlagBase___repr, __pyx_k_Pyx_FlagBase___repr, sizeof(__pyx_k_Pyx_FlagBase___repr), 0, 0, 1, 1},
     {&__pyx_n_s_Pyx_FlagBase___str, __pyx_k_Pyx_FlagBase___str, sizeof(__pyx_k_Pyx_FlagBase___str), 0, 0, 1, 1},
-    {&__pyx_n_s_UnexpectedPart, __pyx_k_UnexpectedPart, sizeof(__pyx_k_UnexpectedPart), 0, 0, 1, 1},
     {&__pyx_kp_s_Unknown_enum_value_s, __pyx_k_Unknown_enum_value_s, sizeof(__pyx_k_Unknown_enum_value_s), 0, 0, 1, 0},
     {&__pyx_n_s_ValueError, __pyx_k_ValueError, sizeof(__pyx_k_ValueError), 0, 0, 1, 1},
     {&__pyx_kp_b__12, __pyx_k__12, sizeof(__pyx_k__12), 0, 0, 0, 0},
@@ -23724,7 +23584,7 @@ static int __Pyx_CreateStringTabAndInitStrings(void) {
 }
 /* #### Code section: cached_builtins ### */
 static CYTHON_SMALL_CODE int __Pyx_InitCachedBuiltins(void) {
-  __pyx_builtin_ValueError = __Pyx_GetBuiltinName(__pyx_n_s_ValueError); if (!__pyx_builtin_ValueError) __PYX_ERR(0, 43, __pyx_L1_error)
+  __pyx_builtin_ValueError = __Pyx_GetBuiltinName(__pyx_n_s_ValueError); if (!__pyx_builtin_ValueError) __PYX_ERR(0, 70, __pyx_L1_error)
   return 0;
   __pyx_L1_error:;
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@@ -23746,14 +23606,14 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_tuple__2);
   __Pyx_GIVEREF(__pyx_tuple__2);
 
-  /* "streaming_form_data/_parser.pyx":43
+  /* "streaming_form_data/_parser.pyx":70
  *     def __init__(self, target):
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  *             raise ValueError("Empty values not allowed")             # <<<<<<<<<<<<<<
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-  __pyx_tuple__4 = PyTuple_Pack(1, __pyx_kp_u_Empty_values_not_allowed); if (unlikely(!__pyx_tuple__4)) __PYX_ERR(0, 43, __pyx_L1_error)
+  __pyx_tuple__4 = PyTuple_Pack(1, __pyx_kp_u_Empty_values_not_allowed); if (unlikely(!__pyx_tuple__4)) __PYX_ERR(0, 70, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__4);
   __Pyx_GIVEREF(__pyx_tuple__4);
 
@@ -23770,7 +23630,7 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
   __pyx_tuple__14 = PyTuple_Pack(3, __pyx_int_121382421, __pyx_int_12740226, __pyx_int_248083859); if (unlikely(!__pyx_tuple__14)) __PYX_ERR(1, 4, __pyx_L1_error)
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+  __pyx_tuple__15 = PyTuple_Pack(3, __pyx_int_97839140, __pyx_int_201872428, __pyx_int_1564805); if (unlikely(!__pyx_tuple__15)) __PYX_ERR(1, 4, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__15);
   __Pyx_GIVEREF(__pyx_tuple__15);
 
@@ -23868,44 +23728,44 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
   __Pyx_GIVEREF(__pyx_tuple__29);
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-  /* "streaming_form_data/_parser.pyx":51
+  /* "streaming_form_data/_parser.pyx":78
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  *     cpdef feed(self, Byte byte):             # <<<<<<<<<<<<<<
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-  __pyx_tuple__31 = PyTuple_Pack(2, __pyx_n_s_self, __pyx_n_s_byte); if (unlikely(!__pyx_tuple__31)) __PYX_ERR(0, 51, __pyx_L1_error)
+  __pyx_tuple__31 = PyTuple_Pack(2, __pyx_n_s_self, __pyx_n_s_byte); if (unlikely(!__pyx_tuple__31)) __PYX_ERR(0, 78, __pyx_L1_error)
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+  __pyx_codeobj__32 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__31, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_feed, 78, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__32)) __PYX_ERR(0, 78, __pyx_L1_error)
 
-  /* "streaming_form_data/_parser.pyx":79
+  /* "streaming_form_data/_parser.pyx":106
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-  __pyx_codeobj__33 = (PyObject*)__Pyx_PyCode_New(1, 0, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__23, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_inactive, 79, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__33)) __PYX_ERR(0, 79, __pyx_L1_error)
+  __pyx_codeobj__33 = (PyObject*)__Pyx_PyCode_New(1, 0, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__23, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_inactive, 106, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__33)) __PYX_ERR(0, 106, __pyx_L1_error)
 
-  /* "streaming_form_data/_parser.pyx":82
+  /* "streaming_form_data/_parser.pyx":109
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+  __pyx_codeobj__34 = (PyObject*)__Pyx_PyCode_New(1, 0, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__23, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_active, 109, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__34)) __PYX_ERR(0, 109, __pyx_L1_error)
 
-  /* "streaming_form_data/_parser.pyx":85
+  /* "streaming_form_data/_parser.pyx":112
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  *     cpdef bint found(self):             # <<<<<<<<<<<<<<
  *         return self.state == FinderState.FS_END
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-  __pyx_codeobj__35 = (PyObject*)__Pyx_PyCode_New(1, 0, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__23, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_found, 85, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__35)) __PYX_ERR(0, 85, __pyx_L1_error)
+  __pyx_codeobj__35 = (PyObject*)__Pyx_PyCode_New(1, 0, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__23, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_found, 112, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__35)) __PYX_ERR(0, 112, __pyx_L1_error)
 
   /* "(tree fragment)":1
  * def __reduce_cython__(self):             # <<<<<<<<<<<<<<
@@ -23922,68 +23782,68 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
  */
   __pyx_codeobj__37 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__18, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_stringsource, __pyx_n_s_setstate_cython, 16, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__37)) __PYX_ERR(1, 16, __pyx_L1_error)
 
-  /* "streaming_form_data/_parser.pyx":103
+  /* "streaming_form_data/_parser.pyx":130
  *         self.targets = [target]
  * 
  *     def add_target(self, object target):             # <<<<<<<<<<<<<<
  *         self.targets.append(target)
  * 
  */
-  __pyx_tuple__38 = PyTuple_Pack(2, __pyx_n_s_self, __pyx_n_s_target); if (unlikely(!__pyx_tuple__38)) __PYX_ERR(0, 103, __pyx_L1_error)
+  __pyx_tuple__38 = PyTuple_Pack(2, __pyx_n_s_self, __pyx_n_s_target); if (unlikely(!__pyx_tuple__38)) __PYX_ERR(0, 130, __pyx_L1_error)
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   __Pyx_GIVEREF(__pyx_tuple__38);
-  __pyx_codeobj__39 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__38, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_add_target, 103, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__39)) __PYX_ERR(0, 103, __pyx_L1_error)
+  __pyx_codeobj__39 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__38, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_add_target, 130, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__39)) __PYX_ERR(0, 130, __pyx_L1_error)
 
-  /* "streaming_form_data/_parser.pyx":106
+  /* "streaming_form_data/_parser.pyx":133
  *         self.targets.append(target)
  * 
  *     def set_multipart_filename(self, str value):             # <<<<<<<<<<<<<<
  *         for target in self.targets:
  *             target.multipart_filename = value
  */
-  __pyx_tuple__40 = PyTuple_Pack(3, __pyx_n_s_self, __pyx_n_s_value, __pyx_n_s_target); if (unlikely(!__pyx_tuple__40)) __PYX_ERR(0, 106, __pyx_L1_error)
+  __pyx_tuple__40 = PyTuple_Pack(3, __pyx_n_s_self, __pyx_n_s_value, __pyx_n_s_target); if (unlikely(!__pyx_tuple__40)) __PYX_ERR(0, 133, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__40);
   __Pyx_GIVEREF(__pyx_tuple__40);
-  __pyx_codeobj__41 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 3, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__40, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_set_multipart_filename, 106, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__41)) __PYX_ERR(0, 106, __pyx_L1_error)
+  __pyx_codeobj__41 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 3, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__40, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_set_multipart_filename, 133, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__41)) __PYX_ERR(0, 133, __pyx_L1_error)
 
-  /* "streaming_form_data/_parser.pyx":110
+  /* "streaming_form_data/_parser.pyx":137
  *             target.multipart_filename = value
  * 
  *     def set_multipart_content_type(self, str value):             # <<<<<<<<<<<<<<
  *         for target in self.targets:
  *             target.multipart_content_type = value
  */
-  __pyx_codeobj__42 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 3, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__40, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_set_multipart_content_type, 110, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__42)) __PYX_ERR(0, 110, __pyx_L1_error)
+  __pyx_codeobj__42 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 3, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__40, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_set_multipart_content_type, 137, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__42)) __PYX_ERR(0, 137, __pyx_L1_error)
 
-  /* "streaming_form_data/_parser.pyx":114
+  /* "streaming_form_data/_parser.pyx":141
  *             target.multipart_content_type = value
  * 
  *     def start(self):             # <<<<<<<<<<<<<<
  *         for target in self.targets:
  *             target.start()
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-  __pyx_codeobj__43 = (PyObject*)__Pyx_PyCode_New(1, 0, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__38, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_start, 114, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__43)) __PYX_ERR(0, 114, __pyx_L1_error)
+  __pyx_codeobj__43 = (PyObject*)__Pyx_PyCode_New(1, 0, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__38, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_start, 141, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__43)) __PYX_ERR(0, 141, __pyx_L1_error)
 
-  /* "streaming_form_data/_parser.pyx":118
+  /* "streaming_form_data/_parser.pyx":145
  *             target.start()
  * 
  *     def data_received(self, bytes chunk):             # <<<<<<<<<<<<<<
  *         for target in self.targets:
  *             target.data_received(chunk)
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-  __pyx_tuple__44 = PyTuple_Pack(3, __pyx_n_s_self, __pyx_n_s_chunk, __pyx_n_s_target); if (unlikely(!__pyx_tuple__44)) __PYX_ERR(0, 118, __pyx_L1_error)
+  __pyx_tuple__44 = PyTuple_Pack(3, __pyx_n_s_self, __pyx_n_s_chunk, __pyx_n_s_target); if (unlikely(!__pyx_tuple__44)) __PYX_ERR(0, 145, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__44);
   __Pyx_GIVEREF(__pyx_tuple__44);
-  __pyx_codeobj__45 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 3, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__44, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_data_received, 118, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__45)) __PYX_ERR(0, 118, __pyx_L1_error)
+  __pyx_codeobj__45 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 3, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__44, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_data_received, 145, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__45)) __PYX_ERR(0, 145, __pyx_L1_error)
 
-  /* "streaming_form_data/_parser.pyx":122
+  /* "streaming_form_data/_parser.pyx":149
  *             target.data_received(chunk)
  * 
  *     def finish(self):             # <<<<<<<<<<<<<<
  *         for target in self.targets:
  *             target.finish()
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-  __pyx_codeobj__46 = (PyObject*)__Pyx_PyCode_New(1, 0, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__38, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_finish, 122, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__46)) __PYX_ERR(0, 122, __pyx_L1_error)
+  __pyx_codeobj__46 = (PyObject*)__Pyx_PyCode_New(1, 0, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__38, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_streaming_form_data__parser_pyx, __pyx_n_s_finish, 149, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__46)) __PYX_ERR(0, 149, __pyx_L1_error)
 
   /* "(tree fragment)":1
  * def __reduce_cython__(self):             # <<<<<<<<<<<<<<
@@ -24000,59 +23860,59 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
  */
   __pyx_codeobj__48 = (PyObject*)__Pyx_PyCode_New(2, 0, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__18, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_stringsource, __pyx_n_s_setstate_cython, 16, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__48)) __PYX_ERR(1, 16, __pyx_L1_error)
 
-  /* "streaming_form_data/_parser.pyx":138
+  /* "streaming_form_data/_parser.pyx":165
  *         self.targets = [target]
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-  __pyx_t_4 = __Pyx_CyFunction_New(&__pyx_mdef_19streaming_form_data_7_parser_7_Parser_22async_data_received, __Pyx_CYFUNCTION_CCLASS | __Pyx_CYFUNCTION_COROUTINE, __pyx_n_s_Parser_async_data_received, NULL, __pyx_n_s_streaming_form_data__parser, __pyx_d, ((PyObject *)__pyx_codeobj__11)); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 268, __pyx_L1_error)
+  __pyx_t_4 = __Pyx_CyFunction_New(&__pyx_mdef_19streaming_form_data_7_parser_7_Parser_22async_data_received, __Pyx_CYFUNCTION_CCLASS | __Pyx_CYFUNCTION_COROUTINE, __pyx_n_s_Parser_async_data_received, NULL, __pyx_n_s_streaming_form_data__parser, __pyx_d, ((PyObject *)__pyx_codeobj__11)); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 276, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_4);
-  if (__Pyx_SetItemOnTypeDict((PyObject *)__pyx_ptype_19streaming_form_data_7_parser__Parser, __pyx_n_s_async_data_received, __pyx_t_4) < 0) __PYX_ERR(0, 268, __pyx_L1_error)
+  if (__Pyx_SetItemOnTypeDict((PyObject *)__pyx_ptype_19streaming_form_data_7_parser__Parser, __pyx_n_s_async_data_received, __pyx_t_4) < 0) __PYX_ERR(0, 276, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
   PyType_Modified(__pyx_ptype_19streaming_form_data_7_parser__Parser);
 
-  /* "streaming_form_data/_parser.pyx":298
+  /* "streaming_form_data/_parser.pyx":306
  *         return (chunk, index)
  * 
  *     def _parse(self, bytes chunk, size_t index):             # <<<<<<<<<<<<<<
  *         cdef size_t idx, buffer_start, chunk_len
  *         cdef size_t match_start, skip_count, matched_length
  */
-  __pyx_t_4 = __Pyx_CyFunction_New(&__pyx_mdef_19streaming_form_data_7_parser_7_Parser_25_parse, __Pyx_CYFUNCTION_CCLASS, __pyx_n_s_Parser__parse, NULL, __pyx_n_s_streaming_form_data__parser, __pyx_d, ((PyObject *)__pyx_codeobj__64)); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 298, __pyx_L1_error)
+  __pyx_t_4 = __Pyx_CyFunction_New(&__pyx_mdef_19streaming_form_data_7_parser_7_Parser_25_parse, __Pyx_CYFUNCTION_CCLASS, __pyx_n_s_Parser__parse, NULL, __pyx_n_s_streaming_form_data__parser, __pyx_d, ((PyObject *)__pyx_codeobj__64)); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 306, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_4);
-  if (__Pyx_SetItemOnTypeDict((PyObject *)__pyx_ptype_19streaming_form_data_7_parser__Parser, __pyx_n_s_parse, __pyx_t_4) < 0) __PYX_ERR(0, 298, __pyx_L1_error)
+  if (__Pyx_SetItemOnTypeDict((PyObject *)__pyx_ptype_19streaming_form_data_7_parser__Parser, __pyx_n_s_parse, __pyx_t_4) < 0) __PYX_ERR(0, 306, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
   PyType_Modified(__pyx_ptype_19streaming_form_data_7_parser__Parser);
 
@@ -26161,7 +26033,7 @@ if (!__Pyx_RefNanny) {
 
   /* "(tree fragment)":16
  *     else:
- *         return __pyx_unpickle__Parser, (type(self), 0x428af85, state)
+ *         return __pyx_unpickle__Parser, (type(self), 0x5d4e824, state)
  * def __setstate_cython__(self, __pyx_state):             # <<<<<<<<<<<<<<
  *     __pyx_unpickle__Parser__set_state(self, __pyx_state)
  */
@@ -32926,6 +32798,185 @@ static void __Pyx_AddTraceback(const char *funcname, int c_line,
     return (enum __pyx_t_19streaming_form_data_7_parser_FinderState) -1;
 }
 
+/* CIntFromPy */
+  static CYTHON_INLINE enum __pyx_t_19streaming_form_data_7_parser_ErrorCode __Pyx_PyInt_As_enum____pyx_t_19streaming_form_data_7_parser_ErrorCode(PyObject *x) {
+#ifdef __Pyx_HAS_GCC_DIAGNOSTIC
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion"
+#endif
+    const enum __pyx_t_19streaming_form_data_7_parser_ErrorCode neg_one = (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) -1, const_zero = (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) 0;
+#ifdef __Pyx_HAS_GCC_DIAGNOSTIC
+#pragma GCC diagnostic pop
+#endif
+    const int is_unsigned = neg_one > const_zero;
+#if PY_MAJOR_VERSION < 3
+    if (likely(PyInt_Check(x))) {
+        if ((sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) < sizeof(long))) {
+            __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, long, PyInt_AS_LONG(x))
+        } else {
+            long val = PyInt_AS_LONG(x);
+            if (is_unsigned && unlikely(val < 0)) {
+                goto raise_neg_overflow;
+            }
+            return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) val;
+        }
+    } else
+#endif
+    if (likely(PyLong_Check(x))) {
+        if (is_unsigned) {
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (unlikely(__Pyx_PyLong_IsNeg(x))) {
+                goto raise_neg_overflow;
+            } else if (__Pyx_PyLong_IsCompact(x)) {
+                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, __Pyx_compact_upylong, __Pyx_PyLong_CompactValueUnsigned(x))
+            } else {
+                const digit* digits = __Pyx_PyLong_Digits(x);
+                assert(__Pyx_PyLong_DigitCount(x) > 1);
+                switch (__Pyx_PyLong_DigitCount(x)) {
+                    case 2:
+                        if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) > 1 * PyLong_SHIFT)) {
+                            if ((8 * sizeof(unsigned long) > 2 * PyLong_SHIFT)) {
+                                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
+                            } else if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) >= 2 * PyLong_SHIFT)) {
+                                return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) (((((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[1]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[0]));
+                            }
+                        }
+                        break;
+                    case 3:
+                        if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) > 2 * PyLong_SHIFT)) {
+                            if ((8 * sizeof(unsigned long) > 3 * PyLong_SHIFT)) {
+                                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
+                            } else if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) >= 3 * PyLong_SHIFT)) {
+                                return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) (((((((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[2]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[1]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[0]));
+                            }
+                        }
+                        break;
+                    case 4:
+                        if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) > 3 * PyLong_SHIFT)) {
+                            if ((8 * sizeof(unsigned long) > 4 * PyLong_SHIFT)) {
+                                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
+                            } else if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) >= 4 * PyLong_SHIFT)) {
+                                return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) (((((((((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[3]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[2]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[1]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[0]));
+                            }
+                        }
+                        break;
+                }
+            }
+#endif
+#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX < 0x030C00A7
+            if (unlikely(Py_SIZE(x) < 0)) {
+                goto raise_neg_overflow;
+            }
+#else
+            {
+                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
+                if (unlikely(result < 0))
+                    return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) -1;
+                if (unlikely(result == 1))
+                    goto raise_neg_overflow;
+            }
+#endif
+            if ((sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) <= sizeof(unsigned long))) {
+                __PYX_VERIFY_RETURN_INT_EXC(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, unsigned long, PyLong_AsUnsignedLong(x))
+#ifdef HAVE_LONG_LONG
+            } else if ((sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) <= sizeof(unsigned PY_LONG_LONG))) {
+                __PYX_VERIFY_RETURN_INT_EXC(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
+#endif
+            }
+        } else {
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (__Pyx_PyLong_IsCompact(x)) {
+                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, __Pyx_compact_pylong, __Pyx_PyLong_CompactValue(x))
+            } else {
+                const digit* digits = __Pyx_PyLong_Digits(x);
+                assert(__Pyx_PyLong_DigitCount(x) > 1);
+                switch (__Pyx_PyLong_SignedDigitCount(x)) {
+                    case -2:
+                        if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) - 1 > 1 * PyLong_SHIFT)) {
+                            if ((8 * sizeof(unsigned long) > 2 * PyLong_SHIFT)) {
+                                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
+                            } else if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) - 1 > 2 * PyLong_SHIFT)) {
+                                return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) (((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)-1)*(((((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[1]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[0])));
+                            }
+                        }
+                        break;
+                    case 2:
+                        if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) > 1 * PyLong_SHIFT)) {
+                            if ((8 * sizeof(unsigned long) > 2 * PyLong_SHIFT)) {
+                                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
+                            } else if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) - 1 > 2 * PyLong_SHIFT)) {
+                                return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) ((((((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[1]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[0])));
+                            }
+                        }
+                        break;
+                    case -3:
+                        if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) - 1 > 2 * PyLong_SHIFT)) {
+                            if ((8 * sizeof(unsigned long) > 3 * PyLong_SHIFT)) {
+                                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
+                            } else if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) - 1 > 3 * PyLong_SHIFT)) {
+                                return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) (((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)-1)*(((((((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[2]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[1]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[0])));
+                            }
+                        }
+                        break;
+                    case 3:
+                        if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) > 2 * PyLong_SHIFT)) {
+                            if ((8 * sizeof(unsigned long) > 3 * PyLong_SHIFT)) {
+                                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
+                            } else if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) - 1 > 3 * PyLong_SHIFT)) {
+                                return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) ((((((((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[2]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[1]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[0])));
+                            }
+                        }
+                        break;
+                    case -4:
+                        if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) - 1 > 3 * PyLong_SHIFT)) {
+                            if ((8 * sizeof(unsigned long) > 4 * PyLong_SHIFT)) {
+                                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
+                            } else if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) - 1 > 4 * PyLong_SHIFT)) {
+                                return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) (((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)-1)*(((((((((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[3]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[2]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[1]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[0])));
+                            }
+                        }
+                        break;
+                    case 4:
+                        if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) > 3 * PyLong_SHIFT)) {
+                            if ((8 * sizeof(unsigned long) > 4 * PyLong_SHIFT)) {
+                                __PYX_VERIFY_RETURN_INT(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
+                            } else if ((8 * sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) - 1 > 4 * PyLong_SHIFT)) {
+                                return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) ((((((((((enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[3]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[2]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[1]) << PyLong_SHIFT) | (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode)digits[0])));
+                            }
+                        }
+                        break;
+                }
+            }
+#endif
+            if ((sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) <= sizeof(long))) {
+                __PYX_VERIFY_RETURN_INT_EXC(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, long, PyLong_AsLong(x))
+#ifdef HAVE_LONG_LONG
+            } else if ((sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) <= sizeof(PY_LONG_LONG))) {
+                __PYX_VERIFY_RETURN_INT_EXC(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode, PY_LONG_LONG, PyLong_AsLongLong(x))
+#endif
+            }
+        }
+        PyErr_SetString(PyExc_RuntimeError,
+                        "_PyLong_AsByteArray() not available, cannot convert large enums");
+        return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) -1;
+    } else {
+        enum __pyx_t_19streaming_form_data_7_parser_ErrorCode val;
+        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
+        if (!tmp) return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) -1;
+        val = __Pyx_PyInt_As_enum____pyx_t_19streaming_form_data_7_parser_ErrorCode(tmp);
+        Py_DECREF(tmp);
+        return val;
+    }
+raise_overflow:
+    PyErr_SetString(PyExc_OverflowError,
+        "value too large to convert to enum __pyx_t_19streaming_form_data_7_parser_ErrorCode");
+    return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) -1;
+raise_neg_overflow:
+    PyErr_SetString(PyExc_OverflowError,
+        "can't convert negative value to enum __pyx_t_19streaming_form_data_7_parser_ErrorCode");
+    return (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) -1;
+}
+
 /* CIntToPy */
   static CYTHON_INLINE PyObject* __Pyx_PyInt_From_enum____pyx_t_19streaming_form_data_7_parser_ParserState(enum __pyx_t_19streaming_form_data_7_parser_ParserState value) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
@@ -33844,31 +33895,31 @@ static void __Pyx_AddTraceback(const char *funcname, int c_line,
 }
 
 /* CIntToPy */
-  static CYTHON_INLINE PyObject* __Pyx_PyInt_From_enum____pyx_t_19streaming_form_data_7_parser_ErrorGroup(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup value) {
+  static CYTHON_INLINE PyObject* __Pyx_PyInt_From_enum____pyx_t_19streaming_form_data_7_parser_ErrorCode(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode value) {
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
 #endif
-    const enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup neg_one = (enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup) -1, const_zero = (enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup) 0;
+    const enum __pyx_t_19streaming_form_data_7_parser_ErrorCode neg_one = (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) -1, const_zero = (enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) 0;
 #ifdef __Pyx_HAS_GCC_DIAGNOSTIC
 #pragma GCC diagnostic pop
 #endif
     const int is_unsigned = neg_one > const_zero;
     if (is_unsigned) {
-        if (sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup) < sizeof(long)) {
+        if (sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) < sizeof(long)) {
             return PyInt_FromLong((long) value);
-        } else if (sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup) <= sizeof(unsigned long)) {
+        } else if (sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) <= sizeof(unsigned long)) {
             return PyLong_FromUnsignedLong((unsigned long) value);
 #ifdef HAVE_LONG_LONG
-        } else if (sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup) <= sizeof(unsigned PY_LONG_LONG)) {
+        } else if (sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) <= sizeof(unsigned PY_LONG_LONG)) {
             return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
 #endif
         }
     } else {
-        if (sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup) <= sizeof(long)) {
+        if (sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) <= sizeof(long)) {
             return PyInt_FromLong((long) value);
 #ifdef HAVE_LONG_LONG
-        } else if (sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup) <= sizeof(PY_LONG_LONG)) {
+        } else if (sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode) <= sizeof(PY_LONG_LONG)) {
             return PyLong_FromLongLong((PY_LONG_LONG) value);
 #endif
         }
@@ -33877,14 +33928,14 @@ static void __Pyx_AddTraceback(const char *funcname, int c_line,
         int one = 1; int little = (int)*(unsigned char *)&one;
         unsigned char *bytes = (unsigned char *)&value;
 #if !CYTHON_COMPILING_IN_LIMITED_API && PY_VERSION_HEX < 0x030d0000
-        return _PyLong_FromByteArray(bytes, sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup),
+        return _PyLong_FromByteArray(bytes, sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode),
                                      little, !is_unsigned);
 #else
         PyObject *from_bytes, *result = NULL;
         PyObject *py_bytes = NULL, *arg_tuple = NULL, *kwds = NULL, *order_str = NULL;
         from_bytes = PyObject_GetAttrString((PyObject*)&PyLong_Type, "from_bytes");
         if (!from_bytes) return NULL;
-        py_bytes = PyBytes_FromStringAndSize((char*)bytes, sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorGroup));
+        py_bytes = PyBytes_FromStringAndSize((char*)bytes, sizeof(enum __pyx_t_19streaming_form_data_7_parser_ErrorCode));
         if (!py_bytes) goto limited_bad;
         order_str = PyUnicode_FromString(little ? "little" : "big");
         if (!order_str) goto limited_bad;
diff --git a/streaming_form_data/_parser.pyx b/streaming_form_data/_parser.pyx
index 8ce76570..203b7c71 100644
--- a/streaming_form_data/_parser.pyx
+++ b/streaming_form_data/_parser.pyx
@@ -21,15 +21,42 @@ cdef enum FinderState:
     FS_START, FS_WORKING, FS_END
 
 
-# 100..199: internal program errors (asserts)
-# 200..299: problems with delimiting multipart stream into parts
-# 300..399: problems with parsing particular part headers
-# 400..499: problems with unregistered parts
-cpdef enum ErrorGroup:
-    Internal = 100
-    Delimiting = 200
-    PartHeaders = 300
-    UnexpectedPart = 400
+cdef enum ParserState:
+    PS_START,
+    PS_START_CR,
+
+    PS_STARTING_BOUNDARY,
+    PS_READING_BOUNDARY,
+    PS_ENDING_BOUNDARY,
+
+    PS_READING_HEADER,
+    PS_ENDING_HEADER,
+    PS_ENDED_HEADER,
+    PS_ENDING_ALL_HEADERS,
+
+    PS_READING_BODY,
+
+    PS_END,
+
+    PS_ERROR
+
+
+cpdef enum ErrorCode:
+    """
+    Errors that can be reported to the user
+    """
+
+    # Internal program errors (eg. assertions that should not fail)
+    E_INTERNAL,
+
+    # Problems with delimiting multipart stream into parts
+    E_DELIMITING,
+
+    # Problems with parsing specific part headers
+    E_PART_HEADERS,
+
+    # Problems with unregistered parts
+    E_UNEXPECTED_PART,
 
 
 cdef class Finder:
@@ -159,28 +186,9 @@ cdef class AsyncPart:
             await target.finish()
 
 
-cdef enum ParserState:
-    PS_START,
-    PS_START_CR,
-
-    PS_STARTING_BOUNDARY,
-    PS_READING_BOUNDARY,
-    PS_ENDING_BOUNDARY,
-
-    PS_READING_HEADER,
-    PS_ENDING_HEADER,
-    PS_ENDED_HEADER,
-    PS_ENDING_ALL_HEADERS,
-
-    PS_READING_BODY,
-
-    PS_END,
-
-    PS_ERROR
-
-
 cdef class _Parser:
     cdef ParserState state
+    cdef ErrorCode error_code
 
     cdef Finder delimiter_finder, ender_finder
     cdef size_t delimiter_length, ender_length
@@ -316,20 +324,17 @@ cdef class _Parser:
                 elif byte == c_cr:
                     self.state = ParserState.PS_START_CR
                 else:
-                    self.mark_error()
-                    return ErrorGroup.Delimiting + 1
+                    return self.mark_error(ErrorCode.E_DELIMITING)
 
             elif self.state == ParserState.PS_START_CR:
                 if byte == c_lf:
                     self.state = ParserState.PS_START
                 else:
-                    self.mark_error()
-                    return ErrorGroup.Delimiting + 4
+                    return self.mark_error(ErrorCode.E_DELIMITING)
 
             elif self.state == ParserState.PS_STARTING_BOUNDARY:
                 if byte != c_hyphen:
-                    self.mark_error()
-                    return ErrorGroup.Delimiting + 2
+                    return self.mark_error(ErrorCode.E_DELIMITING)
 
                 self.state = ParserState.PS_READING_BOUNDARY
             elif self.state == ParserState.PS_READING_BOUNDARY:
@@ -338,13 +343,11 @@ cdef class _Parser:
 
             elif self.state == ParserState.PS_ENDING_BOUNDARY:
                 if byte != c_lf:
-                    self.mark_error()
-                    return ErrorGroup.Delimiting + 3
+                    return self.mark_error(ErrorCode.E_DELIMITING)
 
                 # ensure we have read correct starting delimiter
                 if b"\r\n" + chunk[buffer_start: idx + 1] != self.delimiter_finder.target:
-                    self.mark_error()
-                    return ErrorGroup.Delimiting + 5
+                    return self.mark_error(ErrorCode.E_DELIMITING)
 
                 buffer_start = idx + 1
 
@@ -355,8 +358,7 @@ cdef class _Parser:
 
             elif self.state == ParserState.PS_ENDING_HEADER:
                 if byte != c_lf:
-                    self.mark_error()
-                    return ErrorGroup.PartHeaders + 1
+                    return self.mark_error(ErrorCode.E_PART_HEADERS)
 
                 message = Parser(policy=HTTP).parsestr(
                     chunk[buffer_start: idx + 1].decode("utf-8")
@@ -364,8 +366,7 @@ cdef class _Parser:
 
                 if "content-disposition" in message:
                     if not message.get_content_disposition() == "form-data":
-                        self.mark_error()
-                        return ErrorGroup.PartHeaders + 1
+                        return self.mark_error(ErrorCode.E_PART_HEADERS)
 
                     params = message["content-disposition"].params
                     name = params.get("name")
@@ -376,8 +377,7 @@ cdef class _Parser:
                             part = self.default_part
                             if self.strict:
                                 self.unexpected_part_name = name
-                                self.mark_error()
-                                return ErrorGroup.UnexpectedPart
+                                return self.mark_error(ErrorCode.E_UNEXPECTED_PART)
 
                         self.set_active_part(part, params.get("filename"))
                 elif "content-type" in message:
@@ -397,8 +397,7 @@ cdef class _Parser:
 
             elif self.state == ParserState.PS_ENDING_ALL_HEADERS:
                 if byte != c_lf:
-                    self.mark_error()
-                    return ErrorGroup.PartHeaders + 2
+                    return self.mark_error(ErrorCode.E_PART_HEADERS)
 
                 buffer_start = idx + 1
 
@@ -411,8 +410,7 @@ cdef class _Parser:
                     self.state = ParserState.PS_READING_HEADER
 
                     if idx + 1 < self.delimiter_length:
-                        self.mark_error()
-                        return ErrorGroup.Internal + 1
+                        return self.mark_error(ErrorCode.E_INTERNAL)
 
                     match_start = idx + 1 - self.delimiter_length
 
@@ -420,13 +418,12 @@ cdef class _Parser:
                         try:
                             self.on_body(chunk[buffer_start: match_start])
                         except Exception:
-                            self.mark_error()
+                            self.mark_error(ErrorCode.E_INTERNAL)
                             raise
 
                         buffer_start = idx + 1
                     else:
-                        self.mark_error()
-                        return ErrorGroup.Internal + 2
+                        return self.mark_error(ErrorCode.E_INTERNAL)
 
                     self.unset_active_part()
                     self.delimiter_finder.reset()
@@ -435,19 +432,18 @@ cdef class _Parser:
                     self.state = ParserState.PS_END
 
                     if idx + 1 < self.ender_length:
-                        self.mark_error()
-                        return ErrorGroup.Internal + 3
+                        return self.mark_error(ErrorCode.E_INTERNAL)
+
                     match_start = idx + 1 - self.ender_length
 
                     if match_start >= buffer_start:
                         try:
                             self.on_body(chunk[buffer_start: match_start])
                         except Exception:
-                            self.mark_error()
+                            self.mark_error(ErrorCode.E_INTERNAL)
                             raise
                     else:
-                        self.mark_error()
-                        return ErrorGroup.Internal + 4
+                        return self.mark_error(ErrorCode.E_INTERNAL)
 
                     buffer_start = idx + 1
 
@@ -469,18 +465,15 @@ cdef class _Parser:
             elif self.state == ParserState.PS_END:
                 return 0
             else:
-                self.mark_error()
-                return ErrorGroup.Internal + 5
+                return self.mark_error(ErrorCode.E_INTERNAL)
 
             idx += 1
 
         if idx != chunk_len:
-            self.mark_error()
-            return ErrorGroup.Internal + 6
+            return self.mark_error(ErrorCode.E_INTERNAL)
 
         if buffer_start > chunk_len:
-            self.mark_error()
-            return ErrorGroup.Internal + 7
+            return self.mark_error(ErrorCode.E_INTERNAL)
 
         if self.state == ParserState.PS_READING_BODY:
             matched_length = max(
@@ -493,7 +486,7 @@ cdef class _Parser:
                 try:
                     self.on_body(chunk[buffer_start: match_start])
                 except Exception:
-                    self.mark_error()
+                    self.mark_error(E_INTERNAL)
                     raise
 
                 buffer_start = match_start
@@ -579,8 +572,9 @@ cdef class _Parser:
 
         return skipped
 
-    cdef mark_error(self):
+    cdef mark_error(self, ErrorCode error_code):
         self.state = ParserState.PS_ERROR
+        self.error_code = error_code
 
         if self.active_part:
             self.active_part.finish()
diff --git a/streaming_form_data/parser.py b/streaming_form_data/parser.py
index 38d7cb7d..606f9ed5 100644
--- a/streaming_form_data/parser.py
+++ b/streaming_form_data/parser.py
@@ -1,7 +1,7 @@
 from email.message import EmailMessage
 from typing import Mapping
 
-from streaming_form_data._parser import ErrorGroup, _Parser  # type: ignore
+from streaming_form_data._parser import ErrorCode, _Parser  # type: ignore
 from streaming_form_data.targets import BaseTarget
 
 
@@ -96,16 +96,16 @@ def _check(self, error_code: int):
         if error_code == 0:
             return
 
-        if ErrorGroup.Internal <= error_code < ErrorGroup.Delimiting:
+        if error_code == ErrorCode.E_INTERNAL:
             message = "internal errors"
-        elif ErrorGroup.Delimiting <= error_code < ErrorGroup.PartHeaders:
+        elif error_code == ErrorGroup.E_DELIMITING:
             message = "delimiting multipart stream into parts"
-        elif ErrorGroup.PartHeaders <= error_code < ErrorGroup.UnexpectedPart:
+        elif error_code == ErrorGroup.E_PART_HEADERS:
             message = "parsing specific part headers"
-        elif ErrorGroup.UnexpectedPart == error_code:
-            part = self._parser.unexpected_part_name
+        elif error_code == ErrorGroup.E_UNEXPECTED_PART:
             raise UnexpectedPartException(
-                f"parsing unexpected part '{part}' in strict mode", part
+                f"parsing unexpected part '{part}' in strict mode",
+                self._parser.unexpected_part_name,
             )
 
         raise ParseFailedException(