1 #include "str.h"
2
str_diffn(const char * s,const char * t,unsigned int len)3 int str_diffn(const char *s,const char *t,unsigned int len)
4 {
5 char x;
6
7 for (;;) {
8 if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
9 if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
10 if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
11 if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
12 }
13 return ((int)(unsigned int)(unsigned char) x)
14 - ((int)(unsigned int)(unsigned char) *t);
15 }
16