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libroot/string: Put the misalignment check in memcmp() into a macro.

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Augustin Cavalier
2025-03-05 13:43:02 -05:00
parent a23e085678
commit f33654d942
1 changed files with 3 additions and 1 deletions
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src/system/libroot/posix/string/memcmp.c
+3 -1
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@@ -9,13 +9,15 @@
#include <string.h> #include <string.h>
#define MISALIGNMENT(PTR, TYPE) ((addr_t)(PTR) & (sizeof(TYPE) - 1))
int int
memcmp(const void *_a, const void *_b, size_t count) memcmp(const void *_a, const void *_b, size_t count)
{ {
const unsigned char *a = (const unsigned char *)_a; const unsigned char *a = (const unsigned char *)_a;
const unsigned char *b = (const unsigned char *)_b; const unsigned char *b = (const unsigned char *)_b;
if ((((addr_t)a) & (sizeof(size_t) - 1)) == 0 && (((addr_t)b) & (sizeof(size_t) - 1)) == 0) { if (MISALIGNMENT(a, size_t) == 0 && MISALIGNMENT(b, size_t) == 0) {
size_t *asz = (size_t *)a; size_t *asz = (size_t *)a;
size_t *bsz = (size_t *)b; size_t *bsz = (size_t *)b;