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