Subversion Repositories planix.SVN

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

#define N       256

char*
strtok(char *s, char *b)
{
        static char *under_rock;
        char map[N], *os;

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