Subversion Repositories planix.SVN

#include <string.h>

#define N       256

size_t
strspn(const char *s, const char *b)
{
        char map[N], *os;

        memset(map, 0, N);
        while(*b)
                map[*(unsigned char *)b++] = 1;
        os = (char *)s;
        while(map[*(unsigned char *)s++])
                ;
        return s - os - 1;
}