github.com/afumu/libc@v0.0.6/musl/src/string/strncasecmp.c (about)

     1  #include <strings.h>
     2  #include <ctype.h>
     3  
     4  int strncasecmp(const char *_l, const char *_r, size_t n)
     5  {
     6  	const unsigned char *l=(void *)_l, *r=(void *)_r;
     7  	if (!n--) return 0;
     8  	for (; *l && *r && n && (*l == *r || tolower(*l) == tolower(*r)); l++, r++, n--);
     9  	return tolower(*l) - tolower(*r);
    10  }
    11  
    12  int __strncasecmp_l(const char *l, const char *r, size_t n, locale_t loc)
    13  {
    14  	return strncasecmp(l, r, n);
    15  }
    16  
    17  weak_alias(__strncasecmp_l, strncasecmp_l);