k-chow/libs/libc/strncasecmp.c

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#include <stddef.h>
#include <ctype.h>
int strncasecmp(const char *s1, const char *s2, size_t n)
{
for (; *s1 && n > 0; s1++, s2++, n--)
if (tolower(*s1) != tolower(*s2))
break;
return n ? tolower(*s1) - tolower(*s2) : 0;
}