/*

 * SPDX-License-Identifier: ISC

 *

 * Copyright (c) 2015 Todd C. Miller <Todd.Miller@sudo.ws>

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 */

#include <config.h>

#include <sudo_compat.h>

#include <sudo_debug.h>

#include <sudo_util.h>

/*

 * Like strtok_r but non-destructive and works w/o a NUL terminator.

 * TODO: Optimize by storing current char in a variable ch

 */

const char *

sudo_strsplit_v1(const char *str, const char *endstr, const char *sep, const char **last)

{

    const char *cp, *s;

    debug_decl(sudo_strsplit, SUDO_DEBUG_UTIL);

    /* If no str specified, use last ptr (if any). */

    if (str == NULL)

  str = *last;

    /* Skip leading separator characters. */

    while (str < endstr) {

  for (s = sep; *s != '\0'; s++) {

      if (*str == *s) {

    str++;

    break;

      }

  }

  if (*s == '\0')

      break;

    }

    /* Empty string? */

    if (str >= endstr) {

  *last = endstr;

  debug_return_ptr(NULL);

    }

    /* Scan str until we hit a char from sep. */

    for (cp = str; cp < endstr; cp++) {

  for (s = sep; *s != '\0'; s++) {

      if (*cp == *s)

    break;

  }

  if (*s != '\0')

      break;

    }

    *last = cp;

    debug_return_const_ptr(str);

}