lib/libc/strings/strcasecmp.c


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#include <ctype.h>  // for tolower
#include <libc.h>   // for __unused
#include <locale.h> // for locale_t
#include <sys/cdefs.h>

int strcasecmp(const char *s1, const char *s2)
{
	unsigned char c1, c2;

	while (*s1 && *s2) {
		c1 = (unsigned char)tolower((unsigned char)*s1);
		c2 = (unsigned char)tolower((unsigned char)*s2);
		if (c1 != c2)
			return c1 - c2;
		s1++;
		s2++;
	}

	return (unsigned char)tolower((unsigned char)*s1) - (unsigned char)tolower((unsigned char)*s2);
}

__weak int strcasecmp_l(const char *s1, const char *s2, locale_t __unused locale)
{
	return strcasecmp(s1, s2);
}