/**********************************************************************

  regposerr.c - Oniguruma (regular expression library)

**********************************************************************/

/*-

 * Copyright (c) 2002-2018  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

/* Can't include regint.h etc.. for conflict of regex_t.

   Define ONIGURUMA_EXPORT here for onigposix.h.

 */

#ifndef ONIGURUMA_EXPORT

#define ONIGURUMA_EXPORT

#endif

#include "config.h"

#include "onigposix.h"

#ifdef HAVE_STRING_H

# include <string.h>

#else

# include <strings.h>

#endif

#if defined(__GNUC__)

#  define ARG_UNUSED  __attribute__ ((unused))

#else

#  define ARG_UNUSED

#endif

#if defined(_WIN32) && !defined(__GNUC__)

#define xsnprintf   sprintf_s

#define xstrncpy(dest,src,size)   strncpy_s(dest,size,src,_TRUNCATE)

#else

#define xsnprintf   snprintf

#define xstrncpy    strncpy

#endif

static char* ESTRING[] = {

  NULL,

  "failed to match",                         /* REG_NOMATCH    */

  "Invalid regular expression",              /* REG_BADPAT     */

  "invalid collating element referenced",    /* REG_ECOLLATE   */

  "invalid character class type referenced", /* REG_ECTYPE     */

  "bad backslash-escape sequence",           /* REG_EESCAPE    */

  "invalid back reference number",           /* REG_ESUBREG    */

  "imbalanced [ and ]",                      /* REG_EBRACK     */

  "imbalanced ( and )",                      /* REG_EPAREN     */

  "imbalanced { and }",                      /* REG_EBRACE     */

  "invalid repeat range {n,m}",              /* REG_BADBR      */

  "invalid range",                           /* REG_ERANGE     */

  "Out of memory",                           /* REG_ESPACE     */

  "? * + not preceded by valid regular expression", /* REG_BADRPT   */

  /* Extended errors */

  "internal error",                          /* REG_EONIG_INTERNAL */

  "invalid wide char value",                 /* REG_EONIG_BADWC    */

  "invalid argument"                         /* REG_EONIG_BADARG   */

};

#include <stdio.h>

extern size_t

regerror(int posix_ecode, const regex_t* reg ARG_UNUSED, char* buf,

	 size_t size)

{

  char* s;

  char tbuf[35];

  size_t len;

  if (posix_ecode > 0

      && posix_ecode < (int )(sizeof(ESTRING) / sizeof(ESTRING[0]))) {

    s = ESTRING[posix_ecode];

  }

  else if (posix_ecode == 0) {

    s = "";

  }

  else {

    xsnprintf(tbuf, sizeof(tbuf), "undefined error code (%d)", posix_ecode);

    s = tbuf;

  }

  len = strlen(s) + 1; /* use strlen() because s is ascii encoding. */

  if (buf != NULL && size > 0) {

    xstrncpy(buf, s, size - 1);

    buf[size - 1] = '\0';

  }

  return len;

}