Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>

#define N       256

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

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