From 7d3c0c25026110b58cc423de2f5b4565ca05fff3 Mon Sep 17 00:00:00 2001
From: Leon Buckel <leon.buckel@protonmail.com>
Date: Wed, 12 Jul 2023 12:31:08 +0200
Subject: [PATCH] Add macro for gcc specific fallthrough attribute

---
 src/api/yajl_common.h | 6 ++++++
 src/yajl_parser.c     | 7 ++++---
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/api/yajl_common.h b/src/api/yajl_common.h
index 9596ef98..a86d238b 100644
--- a/src/api/yajl_common.h
+++ b/src/api/yajl_common.h
@@ -42,6 +42,12 @@ extern "C" {
 #  endif
 #endif
 
+#if defined(__GNUC__) && __GNUC__ >= 7
+#  define YAJL_FALLTHROUGH __attribute__((fallthrough))
+#else
+#  define YAJL_FALLTHROUGH
+#endif
+
 /** pointer to a malloc function, supporting client overriding memory
  *  allocation routines */
 typedef void * (*yajl_malloc_func)(void *ctx, size_t sz);
diff --git a/src/yajl_parser.c b/src/yajl_parser.c
index a52f345d..ee0f9881 100644
--- a/src/yajl_parser.c
+++ b/src/yajl_parser.c
@@ -15,6 +15,7 @@
  */
 
 #include "api/yajl_parse.h"
+#include "api/yajl_common.h"
 #include "yajl_lex.h"
 #include "yajl_parser.h"
 #include "yajl_encode.h"
@@ -343,7 +344,7 @@ yajl_do_parse(yajl_handle hand, const unsigned char * jsonText,
                         goto around_again;
                     }
                     /* intentional fall-through */
-                    __attribute__((fallthrough));
+                    YAJL_FALLTHROUGH;
                 }
                 case yajl_tok_colon:
                 case yajl_tok_comma:
@@ -395,7 +396,7 @@ yajl_do_parse(yajl_handle hand, const unsigned char * jsonText,
                         bufLen = yajl_buf_len(hand->decodeBuf);
                     }
                     /* intentional fall-through */
-                    __attribute__((fallthrough));
+                    YAJL_FALLTHROUGH;
                 case yajl_tok_string:
                     if (hand->callbacks && hand->callbacks->yajl_map_key) {
                         _CC_CHK(hand->callbacks->yajl_map_key(hand->ctx, buf,
@@ -416,7 +417,7 @@ yajl_do_parse(yajl_handle hand, const unsigned char * jsonText,
                 default:
                     yajl_bs_set(hand->stateStack, yajl_state_parse_error);
                     hand->parseError =
-                        "invalid object key (must be a string)"; 
+                        "invalid object key (must be a string)";
                     goto around_again;
             }
         }