#include <lib.h> /* strspn - find length of initial segment of s consisting entirely * of characters from accept */ #include <string.h> size_t strspn(s, accept) _CONST char *s; _CONST char *accept; { register _CONST char *sscan; register _CONST char *ascan; register size_t count; count = 0; for (sscan = s; *sscan != '\0'; sscan++) { for (ascan = accept; *ascan != '\0'; ascan++) if (*sscan == *ascan) break; if (*ascan == '\0') return (count); count++; } return(count); }