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- #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;
- }
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