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Add WEBP_UNSAFE_MEMCMP helper

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Memcmp is used in other parts of libwebp which we didn't see yet in
webputils. The places that use memcp use it as an expression, (i.e. if
(memcmp(...)), so explicitly do not wrap in do { } while (0) guard.

Change-Id: Ifa972640bae052717a1af02112c62dc197dfe0f1
This commit is contained in:
mxms
2025-10-09 16:37:22 +00:00
parent 9636d8e04f
commit e40787da71
1 changed files with 5 additions and 0 deletions
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5
src/utils/bounds_safety.h
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@@ -87,6 +87,10 @@
WEBP_UNSAFE_FORGE_BIDI_INDEXABLE(uint8_t*, src, size), size); \
} while (0)
#define WEBP_UNSAFE_MEMCMP(s1, s2, size) \
memcmp(WEBP_UNSAFE_FORGE_BIDI_INDEXABLE(uint8_t*, s1, size), \
WEBP_UNSAFE_FORGE_BIDI_INDEXABLE(uint8_t*, s2, size), size)
#else // WEBP_SUPPORT_FBOUNDS_SAFETY
#define WEBP_ASSUME_UNSAFE_INDEXABLE_ABI
@@ -105,6 +109,7 @@
#define WEBP_UNSAFE_MEMCPY(dst, src, size) memcpy(dst, src, size)
#define WEBP_UNSAFE_MEMSET(dst, c, size) memset(dst, c, size)
#define WEBP_UNSAFE_MEMMOVE(dst, src, size) memmove(dst, src, size)
#define WEBP_UNSAFE_MEMCMP(s1, s2, size) memcmp(s1, s2, size)
#define WEBP_UNSAFE_FORGE_SINGLE(typ, ptr) ((typ)(ptr))
#define WEBP_UNSAFE_FORGE_BIDI_INDEXABLE(typ, ptr, size) ((typ)(ptr))