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#include <strings.h>
#include <ctype.h>
int strncasecmp(const char *_l, const char *_r, size_t n)
{
const unsigned char *l=_l, *r=_r;
if (!n--) return 0;
for (; *l && *r && n && (*l == *r || tolower(*l) == tolower(*r)); l++, r++, n--);
return tolower(*l) - tolower(*r);
}
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