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ruby--ruby/missing/memcmp.c

19 lines
367 B
C

/* public domain rewrite of memcmp(3) */
#include "ruby/missing.h"
#include <stddef.h>
int
memcmp(const void *s1, const void *s2, size_t len)
{
register unsigned char *a = (unsigned char*)s1;
register unsigned char *b = (unsigned char*)s2;
register int tmp;
for (; len; --len) {
tmp = *a++ - *b++;
if (tmp)
return tmp;
}
return 0;
}