/*

  tre_regerror.c - POSIX tre_regerror() implementation for TRE.

  This software is released under a BSD-style license.

  See the file LICENSE for details and copyright.

*/

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif /* HAVE_CONFIG_H */

#include <string.h>

#ifdef HAVE_WCHAR_H

#include <wchar.h>

#endif /* HAVE_WCHAR_H */

#ifdef HAVE_WCTYPE_H

#include <wctype.h>

#endif /* HAVE_WCTYPE_H */

#include "tre-internal.h"

#include "tre.h"

#ifdef HAVE_GETTEXT

#include <libintl.h>

#else

#define dgettext(p, s) s

#define gettext(s) s

#endif

#define _(String) dgettext(PACKAGE, String)

#define gettext_noop(String) String

/* Error message strings for error codes listed in `tre.h'.  This list

   needs to be in sync with the codes listed there, naturally. */

static const char *tre_error_messages[] =

  { gettext_noop("No error"),        /* REG_OK */

    gettext_noop("No match"),        /* REG_NOMATCH */

    gettext_noop("Invalid regexp"),      /* REG_BADPAT */

    gettext_noop("Unknown collating element"),     /* REG_ECOLLATE */

    gettext_noop("Unknown character class name"),  /* REG_ECTYPE */

    gettext_noop("Trailing backslash"),      /* REG_EESCAPE */

    gettext_noop("Invalid back reference"),    /* REG_ESUBREG */

    gettext_noop("Missing ']'"),       /* REG_EBRACK */

    gettext_noop("Missing ')'"),       /* REG_EPAREN */

    gettext_noop("Missing '}'"),       /* REG_EBRACE */

    gettext_noop("Invalid contents of {}"),    /* REG_BADBR */

    gettext_noop("Invalid character range"),     /* REG_ERANGE */

    gettext_noop("Out of memory"),       /* REG_ESPACE */

    gettext_noop("Invalid use of repetition operators")  /* REG_BADRPT */

  };

size_t

tre_regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size)

{

  const char *err;

  size_t err_len;

  /*LINTED*/(void)&preg;

  if (errcode >= 0

      && errcode < (int)(sizeof(tre_error_messages)

       / sizeof(*tre_error_messages)))

    err = gettext(tre_error_messages[errcode]);

  else

    err = gettext("Unknown error");

  err_len = strlen(err) + 1;

  if (errbuf_size > 0 && errbuf != NULL)

    {

      if (err_len > errbuf_size)

  {

    strncpy(errbuf, err, errbuf_size - 1);

    errbuf[errbuf_size - 1] = '\0';

  }

      else

  {

    strcpy(errbuf, err);

  }

    }

  return err_len;

}

/* EOF */