Subversion Repositories planix.SVN

#include <string.h>

#define N       256

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

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