strncasecmp.c - randomcrap - random crap programs of varying quality
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       ---
       strncasecmp.c (322B)
       ---
            1 #include <ctype.h>
            2 #include <stdio.h>
            3 
            4 int
            5 strncasecmp(const char *s1, const char *s2, size_t n)
            6 {
            7         if (!n--)
            8                 return 0;
            9 
           10         for (; *s1 && *s2 && n && (*s1 == *s2 ||
           11              tolower((unsigned char)*s1) == tolower((unsigned char)*s2)); s1++, s2++, n--)
           12                 ;
           13         return tolower((unsigned char)*s1) - tolower((unsigned char)*s2);
           14 }