strsep函数

//函数/** * strsep - Split a string into tokens * @s: The string to be searched * @ct: The characters to search for * * strsep() updates @s to point after the token, ready for the next call. * * It returns empty tokens, too, behaving exactly like the libc function * of that name. In fact, it was stolen from glibc2 and de-fancy-fied. * Same semantics, slimmer shape. ;) */char *strsep(char **s, const char *ct){    char *sbegin = *s;    char *end;    if (sbegin == NULL)        return NULL;    end = strpbrk(sbegin, ct);    if (end)        *end++ = '\0';    *s = end;    return sbegin;}

/** * strpbrk - Find the first occurrence of a set of characters * @cs: The string to be searched * @ct: The characters to search for */char *strpbrk(const char *cs, const char *ct){    const char *sc1, *sc2;    for (sc1 = cs; *sc1 != '\0'; ++sc1) {        for (sc2 = ct; *sc2 != '\0'; ++sc2) {            if (*sc1 == *sc2)                return (char *)sc1;        }    }    return NULL;}