_strtok

char* _strtok(char *s, const char *dm){    static char *last;    char *tok;    const char* pdm=dm;    if(s == NULL)        s = last;    if(s == NULL)        return NULL;    tok = s;    while (*s != '\0'){        while (*pdm != '\0'){            if (*s == *pdm++){                *s = '\0';                last = s+1;                return tok;            }        }        pdm=dm;        ++s;    }    last=NULL;    return tok;}