/* Compatibility symbols for the obsolete <regexp.h> interface.

   Copyright (C) 1996-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

/* regexp.h now contains only an #error directive, so it cannot be

   used in this file.

   The function that would produce an 'expbuf' to use as the second

   argument to 'step' and 'advance' was defined only in regexp.h,

   as its definition depended on macros defined by the user.  */

#include <regex.h>

#include <shlib-compat.h>

#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23)

/* Define the variables used for the interface.  Avoid .symver on common

   symbol, which just creates a new common symbol, not an alias.  */

char *loc1 __attribute__ ((nocommon));

char *loc2 __attribute__ ((nocommon));

compat_symbol (libc, loc1, loc1, GLIBC_2_0);

compat_symbol (libc, loc2, loc2, GLIBC_2_0);

/* Although we do not support the use we define this variable as well.  */

char *locs __attribute__ ((nocommon));

compat_symbol (libc, locs, locs, GLIBC_2_0);

/* Find the next match in STRING.  The compiled regular expression is

   found in the buffer starting at EXPBUF.  `loc1' will return the

   first character matched and `loc2' points to the next unmatched

   character.  */

int

weak_function attribute_compat_text_section

step (const char *string, const char *expbuf)

{

  regmatch_t match;	/* We only need info about the full match.  */

  expbuf += __alignof (regex_t *);

  expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *);

  if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL)

      == REG_NOMATCH)

    return 0;

  loc1 = (char *) string + match.rm_so;

  loc2 = (char *) string + match.rm_eo;

  return 1;

}

compat_symbol (libc, step, step, GLIBC_2_0);

/* Match the beginning of STRING with the compiled regular expression

   in EXPBUF.  If the match is successful `loc2' will contain the

   position of the first unmatched character.  */

int

weak_function attribute_compat_text_section

advance (const char *string, const char *expbuf)

{

  regmatch_t match;	/* We only need info about the full match.  */

  expbuf += __alignof__ (regex_t *);

  expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *);

  if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL)

      == REG_NOMATCH

      /* We have to check whether the check is at the beginning of the

	 buffer.  */

      || match.rm_so != 0)

    return 0;

  loc2 = (char *) string + match.rm_eo;

  return 1;

}

compat_symbol (libc, advance, advance, GLIBC_2_0);

#endif /* SHLIB_COMPAT (2.0, 2.23) */