/* strncmp -- compare two strings, stop after n bytes. This function is in the public domain. */ #include <ansidecl.h> #ifdef __STDC__ #include <stddef.h> #else #define size_t unsigned long #endif int strncmp(s1, s2, n) const char *s1, *s2; register size_t n; { register unsigned char u1, u2; while (n-- > 0) { u1 = (unsigned char) *s1++; u2 = (unsigned char) *s2++; if (u1 != u2) return u1 - u2; if (u1 == '\0') return 0; } return 0; }