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Merge pull request #541 from syoyo/copilot/sub-pr-537-yet-again

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Fix `tg3__arena_strdup` conflating empty strings with absent strings
This commit is contained in:
Syoyo Fujita
2026-03-21 07:04:10 +09:00
committed by GitHub
parent 1f15c2d140 5e0c5b9ada
commit ad316367b9
1 changed files with 5 additions and 2 deletions
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7
tiny_gltf_v3.h
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@@ -1360,10 +1360,13 @@ static void *tg3__arena_alloc(tg3_arena *arena, size_t size) {
} }
static char *tg3__arena_strdup(tg3_arena *arena, const char *s, size_t len) { static char *tg3__arena_strdup(tg3_arena *arena, const char *s, size_t len) {
if (!s || len == 0) return NULL; if (!s) return NULL;
/* Allocate len+1 bytes; when len==0 this produces a 1-byte "\0" buffer so
* that empty strings (data!=NULL, len==0) remain distinguishable from
* absent strings (data==NULL, len==0). */
char *dst = (char *)tg3__arena_alloc(arena, len + 1); char *dst = (char *)tg3__arena_alloc(arena, len + 1);
if (!dst) return NULL; if (!dst) return NULL;
memcpy(dst, s, len); if (len > 0) memcpy(dst, s, len);
dst[len] = '\0'; dst[len] = '\0';
return dst; return dst;
} }