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json.c
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json.c
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/*
* Copyright (C) 2012, 2013, 2014 James McLaughlin et al. All rights reserved.
* https://github.com/udp/json-parser
* Copyright (C) 2019 Thad Megow et al. All rights reserved.
* https://github.com/tmegow/jp
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "json.h"
#ifdef _MSC_VER
#ifndef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif
#include <stdint.h>
#endif
const struct _json_value json_value_none;
#define PCRE2_CODE_UNIT_WIDTH 8
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <math.h>
#include <pcre2.h>
typedef unsigned int json_uchar;
int MATCH_KEYS = 1;
int SAVE_VALUES = 1;
// thad mods
long int int_char_length (long int value)
{
long int count = 0;
while(value != 0)
{
value /= 10;
++count;
}
return count;
}
static char * prepend_str_const(char * jp, const char * pre)
{
char * temp = (char *) realloc(jp, strlen(pre) + strlen(jp) + 1);
if (!temp)
{
return 0;
}
jp = temp;
void * ptr = memmove(jp + strlen(pre), jp, strlen(jp) + 1);
assert(ptr == jp + strlen(pre));
for (size_t i=0; i < strlen(pre); ++i)
{
jp[i] = pre[i];
}
return jp;
}
int has_whitespace (char * str)
{
int whitespace_found = 0;
for (size_t i=0; i < strlen(str); ++i)
{
switch (str[i])
{
case ' ':
case '\t':
case '\n':
case '\r':
whitespace_found = 1;
break;
}
if (whitespace_found)
break;
}
return whitespace_found;
}
int check_parent_exists (json_value * value)
{
if (value)
{
if (value->parent)
{
return 1;
}
else
{
return 0;
}
}
else
{
return 0;
}
}
int re_match(char * regex, char * value)
{
int Found = 0;
pcre2_code * re;
PCRE2_SPTR pattern;
PCRE2_SPTR subject;
int errornumber;
int rc;
PCRE2_SIZE erroroffset;
size_t subject_length;
pcre2_match_data * match_data;
pattern = (PCRE2_SPTR)regex;
subject = (PCRE2_SPTR)value;
subject_length = strlen((char *)subject);
re = pcre2_compile(
pattern, /* the pattern */
PCRE2_ZERO_TERMINATED, /* indicates pattern is zero-terminated */
0, /* default options */
&errornumber, /* for error number */
&erroroffset, /* for error offset */
NULL); /* use default compile context */
if (re == NULL)
{
PCRE2_UCHAR buffer[256];
pcre2_get_error_message(errornumber, buffer, sizeof(buffer));
printf("PCRE2 compilation failed at offset %d: %s\n", (int)erroroffset,buffer);
return 1;
}
match_data = pcre2_match_data_create_from_pattern(re, NULL);
rc = pcre2_match(
re,
subject, /* the subject string */
subject_length, /* the length of the subject */
0, /* start at offset 0 in the subject */
0, /* default options */
match_data, /* block for storing the result */
NULL);
if (rc < 0)
{
switch(rc)
{
case PCRE2_ERROR_NOMATCH:
pcre2_match_data_free(match_data);
pcre2_code_free(re);
Found = 0;
return Found;
default:
printf("Matching error %d\n", rc);
Found = 0;
return Found;
}
pcre2_match_data_free(match_data);
pcre2_code_free(re);
Found = 0;
return Found;
}
if(rc > 0)
{
Found = 1;
}
pcre2_match_data_free(match_data);
pcre2_code_free(re);
return Found;
}
char * climb (json_value * val, char * current_jp, jp * found)
{
current_jp = (char *) calloc(1, 1 * sizeof(char));
char * char_array_tmp;
char * char_array_tmp2;
char ** char_ptr_array_tmp;
while (check_parent_exists(val))
{
switch (val->parent->type)
{
case json_object:
if (has_whitespace(val->parent->u.object.values[val->parent->u.object.length].name))
{
char_array_tmp = (char *) malloc(sizeof(char) * val->parent->u.object.values[val->parent->u.object.length].name_length + 5);
sprintf(char_array_tmp, "[\'%s\']", val->parent->u.object.values[val->parent->u.object.length].name);
char_array_tmp2 = (char *) realloc(current_jp, sizeof(char) * found->jps_longest + val->parent->u.object.values[val->parent->u.object.length].name_length + 5);
if (!char_array_tmp2)
{
return 0;
}
current_jp = char_array_tmp2;
if (found->jps_longest < found->jps_longest + val->parent->u.object.values[val->parent->u.object.length].name_length + 5)
{
found->jps_longest = found->jps_longest + val->parent->u.object.values[val->parent->u.object.length].name_length + 5;
}
current_jp = prepend_str_const(current_jp, char_array_tmp);
free(char_array_tmp);
if (!current_jp)
{
puts("prepend_str_const problem\n");
}
if (found->check_keys && re_match(found->regex, val->parent->u.object.values[val->parent->u.object.length].name))
{
char_ptr_array_tmp = (char **) realloc(found->values, sizeof(char *) * (found->values_found_count + 1));
if (!char_ptr_array_tmp)
{
return 0;
}
found->values = char_ptr_array_tmp;
found->values_found_count++;
found->key_found = 1;
found->values[found->jps_found_count] = found->value_placeholder;
}
break;
}
else
{
char_array_tmp = (char *) malloc(sizeof(char) * val->parent->u.object.values[val->parent->u.object.length].name_length + 2);
sprintf(char_array_tmp, ".%s", val->parent->u.object.values[val->parent->u.object.length].name);
current_jp = prepend_str_const(current_jp, char_array_tmp);
free(char_array_tmp);
if (!current_jp)
{
puts("prepend_str_const problem\n");
}
if (found->check_keys && re_match(found->regex, val->parent->u.object.values[val->parent->u.object.length].name))
{
char_ptr_array_tmp = (char **) realloc(found->values, sizeof(char *) * (found->values_found_count + 1));
if (!char_ptr_array_tmp)
{
return 0;
}
found->values = char_ptr_array_tmp;
found->values_found_count++;
found->values[found->jps_found_count] = val->u.string.ptr;
found->key_found = 1;
found->values[found->jps_found_count] = found->value_placeholder;
}
break;
}
case json_array:
char_ptr_array_tmp = (char **) realloc(found->values, sizeof(char *) * (found->values_found_count + 1));
if (!char_ptr_array_tmp)
{
return 0;
}
found->values = char_ptr_array_tmp;
found->values_found_count++;
found->values[found->jps_found_count] = found->value_placeholder;
char_array_tmp = (char *) malloc(sizeof(char) * int_char_length(val->parent->u.array.length) + 4);
sprintf(char_array_tmp, "[%d]", val->parent->u.array.length);
char_array_tmp2 = (char *) realloc(current_jp, sizeof(char) * found->jps_longest + int_char_length(val->parent->u.array.length) + 4);
if (!char_array_tmp2)
{
return 0;
}
current_jp = char_array_tmp2;
current_jp = prepend_str_const(current_jp, char_array_tmp);
free(char_array_tmp);
break;
}
val = val->parent;
}
return current_jp;
}
void build_jsonpath (json_value * val, jp * found)
{
char * current_jp = NULL;
char * bool_char;
char * int_char;
char ** char_ptr_array_tmp;
switch (val->type)
{
case json_integer:
int_char = malloc(sizeof(char) * int_char_length(val->u.integer) + 1);
if (found->jps_longest < found->jps_longest + int_char_length(val->u.integer) + 1)
{
found->jps_longest = found->jps_longest + int_char_length(val->u.integer) + 1;
}
sprintf(int_char, "%lld", val->u.integer);
if (re_match(found->regex, int_char))
{
char_ptr_array_tmp = (char **) realloc(found->values, sizeof(char *) * (found->values_found_count + 1));
if (!char_ptr_array_tmp)
{
return;
}
found->values = char_ptr_array_tmp;
found->values_found_count++;
found->values[found->jps_found_count] = int_char;
found->value_placeholder = int_char;
found->value_found = 1;
char_ptr_array_tmp = (char **) realloc(found->values_free, sizeof(char *) * (found->values_free_count + 1));
if (!char_ptr_array_tmp)
{
return;
}
found->values_free = char_ptr_array_tmp;
found->values_free[found->values_free_count] = int_char;
found->values_free_count++;
current_jp = climb(val, current_jp, found);
}
else
{
if (found->check_keys)
{
found->value_placeholder = int_char;
current_jp = climb(val, current_jp, found);
if(!found->key_found)
{
free(int_char);
}
}
else
{
free(int_char);
}
}
break;
case json_double:
int_char = malloc(sizeof(char) * int_char_length(val->u.dbl) + 25);
if (found->jps_longest < found->jps_longest + int_char_length(val->u.dbl) + 25)
{
found->jps_longest = found->jps_longest + int_char_length(val->u.dbl) + 25;
}
sprintf(int_char, "%f", val->u.dbl);
if (re_match(found->regex, int_char))
{
char_ptr_array_tmp = (char **) realloc(found->values, sizeof(char *) * (found->values_found_count + 1));
if (!char_ptr_array_tmp)
{
return;
}
found->values = char_ptr_array_tmp;
found->values_found_count++;
found->values[found->jps_found_count] = int_char;
found->value_placeholder = int_char;
found->value_found = 1;
char_ptr_array_tmp = (char **) realloc(found->values_free, sizeof(char *) * (found->values_free_count + 1));
if (!char_ptr_array_tmp)
{
return;
}
found->values_free = char_ptr_array_tmp;
found->values_free[found->values_free_count] = int_char;
found->values_free_count++;
current_jp = climb(val, current_jp, found);
}
else
{
if (found->check_keys)
{
found->value_placeholder = int_char;
current_jp = climb(val, current_jp, found);
if(!found->key_found)
{
free(int_char);
}
}
else
{
free(int_char);
}
}
break;
case json_string:
found->value_placeholder = val->u.string.ptr;
if (found->jps_longest < found->jps_longest + val->u.string.length + 1)
{
found->jps_longest = found->jps_longest + val->u.string.length + 1;
}
if (re_match(found->regex, val->u.string.ptr))
{
char_ptr_array_tmp = (char **) realloc(found->values, sizeof(char *) * (found->values_found_count + 1));
if (!char_ptr_array_tmp)
{
return;
}
found->values = char_ptr_array_tmp;
found->values_found_count++;
found->values[found->jps_found_count] = val->u.string.ptr;
found->value_found = 1;
current_jp = climb(val, current_jp, found);
}
else
{
if (found->check_keys)
{
found->value_placeholder = val->u.string.ptr;
current_jp = climb(val, current_jp, found);
}
}
break;
case json_boolean:
bool_char = malloc(sizeof(char) * 6);
if (found->jps_longest < found->jps_longest + 6)
{
found->jps_longest = found->jps_longest + 6;
}
sprintf(bool_char, "%s", val->u.boolean ? "true" : "false");
if (re_match(found->regex, bool_char))
{
char_ptr_array_tmp = (char **) realloc(found->values, sizeof(char *) * (found->values_found_count + 1));
if (!char_ptr_array_tmp)
{
return;
}
found->values = char_ptr_array_tmp;
found->values_found_count++;
found->values[found->jps_found_count] = bool_char;
found->value_placeholder = bool_char;
found->value_found = 1;
char_ptr_array_tmp = (char **) realloc(found->values_free, sizeof(char *) * (found->values_free_count + 1));
if (!char_ptr_array_tmp)
{
return;
}
found->values_free = char_ptr_array_tmp;
found->values_free[found->values_free_count] = bool_char;
found->values_free_count++;
current_jp = climb(val, current_jp, found);
}
else
{
if (found->check_keys)
{
current_jp = climb(val, current_jp, found);
if(!found->key_found)
{
free(bool_char);
}
}
else
{
free(bool_char);
}
}
break;
default:
return;
}
if (found->value_found || found->key_found)
{
char ** char_ptr_array_tmp = (char **) realloc(found->jps, sizeof(char *) * (found->jps_found_count + 1));
if (!char_ptr_array_tmp)
{
return;
}
found->jps = char_ptr_array_tmp;
found->jps[found->jps_found_count] = current_jp;
found->jps_found_count++;
found->value_found = found->key_found = 0;
}
else
{
free(current_jp);
}
}
// end thad mods
static const json_int_t JSON_INT_MAX = sizeof(json_int_t) == 1
? INT8_MAX
: (sizeof(json_int_t) == 2
? INT16_MAX
: (sizeof(json_int_t) == 4
? INT32_MAX
: INT64_MAX));
static unsigned char hex_value (json_char c)
{
if (isdigit(c))
return c - '0';
switch (c)
{
case 'a':
case 'A':
return 0x0A;
case 'b':
case 'B':
return 0x0B;
case 'c':
case 'C':
return 0x0C;
case 'd':
case 'D':
return 0x0D;
case 'e':
case 'E':
return 0x0E;
case 'f':
case 'F':
return 0x0F;
default:
return 0xFF;
}
}
static int would_overflow (json_int_t value, json_char b)
{
return ((JSON_INT_MAX - (b - '0')) / 10 ) < value;
}
typedef struct
{
unsigned long used_memory;
unsigned int uint_max;
unsigned long ulong_max;
json_settings settings;
int first_pass;
const json_char * ptr;
unsigned int cur_line, cur_col;
} json_state;
static void * default_alloc (size_t size, int zero, void * user_data)
{
return zero ? calloc (1, size) : malloc (size);
}
static void default_free (void * ptr, void * user_data)
{
free (ptr);
}
static void * json_alloc (json_state * state, unsigned long size, int zero)
{
if ((state->ulong_max - state->used_memory) < size)
return 0;
if (state->settings.max_memory
&& (state->used_memory += size) > state->settings.max_memory)
{
return 0;
}
return state->settings.mem_alloc (size, zero, state->settings.user_data);
}
static int new_value (json_state * state,
json_value ** top, json_value ** root, json_value ** alloc,
json_type type)
{
json_value * value;
int values_size;
if (!state->first_pass)
{
value = *top = *alloc;
*alloc = (*alloc)->_reserved.next_alloc;
if (!*root)
*root = value;
switch (value->type)
{
case json_array:
if (value->u.array.length == 0)
break;
if (! (value->u.array.values = (json_value **) json_alloc
(state, value->u.array.length * sizeof (json_value *), 0)) )
{
return 0;
}
value->u.array.length = 0;
break;
case json_object:
if (value->u.object.length == 0)
break;
values_size = sizeof (*value->u.object.values) * value->u.object.length;
if (! (value->u.object.values = (json_object_entry *) json_alloc
(state, values_size + ((unsigned long) value->u.object.values), 0)) )
{
return 0;
}
value->_reserved.object_mem = (*(char **) &value->u.object.values) + values_size;
value->u.object.length = 0;
break;
case json_string:
if (! (value->u.string.ptr = (json_char *) json_alloc
(state, (value->u.string.length + 1) * sizeof (json_char), 0)) )
{
return 0;
}
value->u.string.length = 0;
break;
default:
break;
};
return 1;
}
if (! (value = (json_value *) json_alloc
(state, sizeof (json_value) + state->settings.value_extra, 1)))
{
return 0;
}
if (!*root)
*root = value;
value->type = type;
value->parent = *top;
#ifdef JSON_TRACK_SOURCE
value->line = state->cur_line;
value->col = state->cur_col;
#endif
if (*alloc)
(*alloc)->_reserved.next_alloc = value;
*alloc = *top = value;
return 1;
}
#define whitespace \
case '\n': ++ state.cur_line; state.cur_col = 0; \
case ' ': case '\t': case '\r'
#define string_add(b) \
do { if (!state.first_pass) string [string_length] = b; ++ string_length; } while (0);
#define line_and_col \
state.cur_line, state.cur_col
static const long
flag_next = 1 << 0,
flag_reproc = 1 << 1,
flag_need_comma = 1 << 2,
flag_seek_value = 1 << 3,
flag_escaped = 1 << 4,
flag_string = 1 << 5,
flag_need_colon = 1 << 6,
flag_done = 1 << 7,
flag_num_negative = 1 << 8,
flag_num_zero = 1 << 9,
flag_num_e = 1 << 10,
flag_num_e_got_sign = 1 << 11,
flag_num_e_negative = 1 << 12,
flag_line_comment = 1 << 13,
flag_block_comment = 1 << 14,
flag_num_got_decimal = 1 << 15;
json_value * json_parse_ex (json_settings * settings,
const json_char * json,
size_t length,
char * error_buf,
jp * jp_struct)
{
json_char error [json_error_max];
const json_char * end;
json_value * top, * root, * alloc = 0;
json_state state = { 0 };
long flags = 0;
double num_digits = 0, num_e = 0;
double num_fraction = 0;
/* Skip UTF-8 BOM
*/
if (length >= 3 && ((unsigned char) json [0]) == 0xEF
&& ((unsigned char) json [1]) == 0xBB
&& ((unsigned char) json [2]) == 0xBF)
{
json += 3;
length -= 3;
}
error[0] = '\0';
end = (json + length);
memcpy (&state.settings, settings, sizeof (json_settings));
if (!state.settings.mem_alloc)
state.settings.mem_alloc = default_alloc;
if (!state.settings.mem_free)
state.settings.mem_free = default_free;
memset (&state.uint_max, 0xFF, sizeof (state.uint_max));
memset (&state.ulong_max, 0xFF, sizeof (state.ulong_max));
state.uint_max -= 8; /* limit of how much can be added before next check */
state.ulong_max -= 8;
for (state.first_pass = 1; state.first_pass >= 0; -- state.first_pass)
{
json_uchar uchar;
unsigned char uc_b1, uc_b2, uc_b3, uc_b4;
json_char * string = 0;
unsigned int string_length = 0;
top = root = 0;
flags = flag_seek_value;
state.cur_line = 1;
for (state.ptr = json ;; ++ state.ptr)
{
json_char b = (state.ptr == end ? 0 : *state.ptr);
int garbage_check;
if (flags & flag_string)
{
if (!b)
{
sprintf (error, "Unexpected EOF in string (at %d:%d)", line_and_col);
goto e_failed;
}
if (string_length > state.uint_max)
goto e_overflow;
if (flags & flag_escaped)
{
flags &= ~ flag_escaped;
switch (b)
{
case 'b':
string_add ('\b');
break;
case 'f':
string_add ('\f');
break;
case 'n':
string_add ('\n');
break;
case 'r':
string_add ('\r');
break;
case 't':
string_add ('\t');
break;
case 'u':
if (end - state.ptr < 4 ||
(uc_b1 = hex_value (*++ state.ptr)) == 0xFF ||
(uc_b2 = hex_value (*++ state.ptr)) == 0xFF ||
(uc_b3 = hex_value (*++ state.ptr)) == 0xFF ||
(uc_b4 = hex_value (*++ state.ptr)) == 0xFF)
{
sprintf (error, "Invalid character value `%c` (at %d:%d)", b, line_and_col);
goto e_failed;
}
uc_b1 = (uc_b1 << 4) | uc_b2;
uc_b2 = (uc_b3 << 4) | uc_b4;
uchar = (uc_b1 << 8) | uc_b2;
if ((uchar & 0xF800) == 0xD800)
{
json_uchar uchar2;
if (end - state.ptr < 6 || (*++ state.ptr) != '\\' || (*++ state.ptr) != 'u' ||
(uc_b1 = hex_value (*++ state.ptr)) == 0xFF ||
(uc_b2 = hex_value (*++ state.ptr)) == 0xFF ||
(uc_b3 = hex_value (*++ state.ptr)) == 0xFF ||
(uc_b4 = hex_value (*++ state.ptr)) == 0xFF)
{
sprintf (error, "Invalid character value `%c` (at %d:%d)", b, line_and_col);
goto e_failed;
}
uc_b1 = (uc_b1 << 4) | uc_b2;
uc_b2 = (uc_b3 << 4) | uc_b4;
uchar2 = (uc_b1 << 8) | uc_b2;
uchar = 0x010000 | ((uchar & 0x3FF) << 10) | (uchar2 & 0x3FF);
}
if (sizeof (json_char) >= sizeof (json_uchar) || (uchar <= 0x7F))
{
string_add ((json_char) uchar);
break;
}
if (uchar <= 0x7FF)
{
if (state.first_pass)
string_length += 2;
else
{
string [string_length ++] = 0xC0 | (uchar >> 6);
string [string_length ++] = 0x80 | (uchar & 0x3F);
}
break;
}
if (uchar <= 0xFFFF)
{
if (state.first_pass)
string_length += 3;
else
{
string [string_length ++] = 0xE0 | (uchar >> 12);
string [string_length ++] = 0x80 | ((uchar >> 6) & 0x3F);
string [string_length ++] = 0x80 | (uchar & 0x3F);
}
break;
}
if (state.first_pass)
string_length += 4;
else
{
string [string_length ++] = 0xF0 | (uchar >> 18);
string [string_length ++] = 0x80 | ((uchar >> 12) & 0x3F);
string [string_length ++] = 0x80 | ((uchar >> 6) & 0x3F);
string [string_length ++] = 0x80 | (uchar & 0x3F);
}
break;
default:
string_add (b);
};
continue;
}
if (b == '\\')
{
flags |= flag_escaped;
continue;
}
if (b == '"')
{
if (!state.first_pass)
{
string [string_length] = 0;
}
flags &= ~ flag_string;
string = 0;
switch (top->type)
{
case json_string:
top->u.string.length = string_length;
flags |= flag_next;
break;
case json_object:
if (state.first_pass)
/*
18:05 < fizzie> FriedOkra: The cast is into "pointer to pointer to json_char", but since there's a & in the operand to take the address of `values`, and a * in front to dereference it, the effect is basically "pretend that the bytes of `values` are a pointer to a json_char, then increment it".
18:06 < fizzie> (Which is most likely to be undefined behavior by a strict interpretation of the standard, unless `values` actually *is* a `json_char *`.)
18:13 < FriedOkra> fizzie: ty! gosh trying to interpret the pointing and dereferencing there is making my head spin. do you know of any helpful docs/guides which may help me grok it?
18:19 < FriedOkra> (*(json_char **) &top->u.object.values) += 1; // values is a pointer to json_char and we grab its address and then cast that as pointer to pointer to json_char - that makes sense. I'm confused about the dereferencing happening which makes it just a pointer to json_char? why not increment value directly?
18:19 < fizzie> Because what the increment does depends on the pointer type.
18:22 < fizzie> So if you had e.g. `int *values;`, if you just say `values += 1;` it increments it to point to a next int object, but if you say `(*(char **)&values) += 1;` it treats the contents of values as if it was a char *, and increments it by one char object.
18:22 < fizzie> (Again, this is not strictly conforming.)
18:37 < fizzie> The `(*(char**)&v2)++` there is pretty close to being the same as `char *tmp = (char *)v2; tmp++; v2 = (int *)tmp;` except instead of using a temporary variable, it just pretends there's a char * at the address of v2.
*/
(*(json_char **) &top->u.object.values) += string_length + 1;
else
{
top->u.object.values [top->u.object.length].name
= (json_char *) top->_reserved.object_mem;
top->u.object.values [top->u.object.length].name_length
= string_length;
(*(json_char **) &top->_reserved.object_mem) += string_length + 1;
}
flags |= flag_seek_value | flag_need_colon;
continue;
default:
break;
};
}
else
{
string_add (b);
continue;
}
}
if (state.settings.settings & json_enable_comments)
{
if (flags & (flag_line_comment | flag_block_comment))
{
if (flags & flag_line_comment)
{
if (b == '\r' || b == '\n' || !b)
{
flags &= ~ flag_line_comment;
-- state.ptr; /* so null can be reproc'd */
}
continue;
}
if (flags & flag_block_comment)
{
if (!b)
{
sprintf (error, "%d:%d: Unexpected EOF in block comment", line_and_col);
goto e_failed;
}
if (b == '*' && state.ptr < (end - 1) && state.ptr [1] == '/')
{
flags &= ~ flag_block_comment;
++ state.ptr; /* skip closing sequence */
}
continue;
}
}
else if (b == '/')
{
if (! (flags & (flag_seek_value | flag_done)) && top->type != json_object)
{
sprintf (error, "%d:%d: Comment not allowed here", line_and_col);
goto e_failed;
}
if (++ state.ptr == end)
{
sprintf (error, "%d:%d: EOF unexpected", line_and_col);
goto e_failed;
}
switch (b = *state.ptr)
{
case '/':
flags |= flag_line_comment;
continue;
case '*':
flags |= flag_block_comment;
continue;
default:
sprintf (error, "%d:%d: Unexpected `%c` in comment opening sequence", line_and_col, b);
goto e_failed;
};