6 /* like strtok(3), but without state, and doesn't modify s. Return
7 * value is indicated by pointer and length, not null terminator.
11 * const char *tok = input;
12 * const char *delim = " \t";
15 * while ((tok = strtok_len (tok + tok_len, delim, &tok_len)) != NULL) {
16 * // do stuff with string tok of length tok_len
20 char *strtok_len (char *s, const char *delim, size_t *len);