ref: 0a5f81a44230cbd562b6d71a0a5be018e24a5ba6
dir: /sys/src/libc/port/strtok.c/
#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; }