/* Copyright (C) 1991-1993, 1996-2007, 2009-2018 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3, or (at your option)

   any later version.

   This program 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 General Public License for more details.

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

   along with this program; if not, see <https://www.gnu.org/licenses/>.  */

#ifndef _LIBC

# include <config.h>

#endif

/* Enable GNU extensions in fnmatch.h.  */

#ifndef _GNU_SOURCE

# define _GNU_SOURCE    1

#endif

#include <fnmatch.h>

#include <alloca.h>

#include <assert.h>

#include <ctype.h>

#include <errno.h>

#include <stddef.h>

#include <stdbool.h>

#include <stdlib.h>

#include <string.h>

#define WIDE_CHAR_SUPPORT \

  (HAVE_WCTYPE_H && HAVE_BTOWC && HAVE_ISWCTYPE \

   && HAVE_WMEMCHR && (HAVE_WMEMCPY || HAVE_WMEMPCPY))

/* For platform which support the ISO C amendment 1 functionality we

   support user defined character classes.  */

#if defined _LIBC || WIDE_CHAR_SUPPORT

# include <wctype.h>

# include <wchar.h>

#endif

/* We need some of the locale data (the collation sequence information)

   but there is no interface to get this information in general.  Therefore

   we support a correct implementation only in glibc.  */

#ifdef _LIBC

# include "../locale/localeinfo.h"

# include "../locale/elem-hash.h"

# include "../locale/coll-lookup.h"

# include <shlib-compat.h>

# define CONCAT(a,b) __CONCAT(a,b)

# define mbsrtowcs __mbsrtowcs

# define fnmatch __fnmatch

extern int fnmatch (const char *pattern, const char *string, int flags);

#endif

#ifndef SIZE_MAX

# define SIZE_MAX ((size_t) -1)

#endif

#include "flexmember.h"

#ifndef FALLTHROUGH

# if __GNUC__ < 7

#  define FALLTHROUGH ((void) 0)

# else

#  define FALLTHROUGH __attribute__ ((__fallthrough__))

# endif

#endif

/* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set.  */

#define NO_LEADING_PERIOD(flags) \

  ((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD))

/* Comment out all this code if we are using the GNU C Library, and are not

   actually compiling the library itself, and have not detected a bug

   in the library.  This code is part of the GNU C

   Library, but also included in many other GNU distributions.  Compiling

   and linking in this code is a waste when using the GNU C library

   (especially if it is a shared library).  Rather than having every GNU

   program understand 'configure --with-gnu-libc' and omit the object files,

   it is simpler to just do this in the source for each such file.  */

#if defined _LIBC || !defined __GNU_LIBRARY__ || !HAVE_FNMATCH_GNU

# if ! (defined isblank || (HAVE_ISBLANK && HAVE_DECL_ISBLANK))

#  define isblank(c) ((c) == ' ' || (c) == '\t')

# endif

# define STREQ(s1, s2) (strcmp (s1, s2) == 0)

# if defined _LIBC || WIDE_CHAR_SUPPORT

/* The GNU C library provides support for user-defined character classes

   and the functions from ISO C amendment 1.  */

#  ifdef CHARCLASS_NAME_MAX

#   define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX

#  else

/* This shouldn't happen but some implementation might still have this

   problem.  Use a reasonable default value.  */

#   define CHAR_CLASS_MAX_LENGTH 256

#  endif

#  ifdef _LIBC

#   define IS_CHAR_CLASS(string) __wctype (string)

#  else

#   define IS_CHAR_CLASS(string) wctype (string)

#  endif

#  ifdef _LIBC

#   define ISWCTYPE(WC, WT)     __iswctype (WC, WT)

#  else

#   define ISWCTYPE(WC, WT)     iswctype (WC, WT)

#  endif

#  if (HAVE_MBSTATE_T && HAVE_MBSRTOWCS) || _LIBC

/* In this case we are implementing the multibyte character handling.  */

#   define HANDLE_MULTIBYTE     1

#  endif

# else

#  define CHAR_CLASS_MAX_LENGTH  6 /* Namely, 'xdigit'.  */

#  define IS_CHAR_CLASS(string)                                               \

   (STREQ (string, "alpha") || STREQ (string, "upper")                        \

    || STREQ (string, "lower") || STREQ (string, "digit")                     \

    || STREQ (string, "alnum") || STREQ (string, "xdigit")                    \

    || STREQ (string, "space") || STREQ (string, "print")                     \

    || STREQ (string, "punct") || STREQ (string, "graph")                     \

    || STREQ (string, "cntrl") || STREQ (string, "blank"))

# endif

/* Avoid depending on library functions or files

   whose names are inconsistent.  */

/* Global variable.  */

static int posixly_correct;

# ifndef internal_function

/* Inside GNU libc we mark some function in a special way.  In other

   environments simply ignore the marking.  */

#  define internal_function

# endif

/* Note that this evaluates C many times.  */

# define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))

# define CHAR   char

# define UCHAR  unsigned char

# define INT    int

# define FCT    internal_fnmatch

# define EXT    ext_match

# define END    end_pattern

# define L_(CS) CS

# ifdef _LIBC

#  define BTOWC(C)      __btowc (C)

# else

#  define BTOWC(C)      btowc (C)

# endif

# define STRLEN(S) strlen (S)

# define STRCAT(D, S) strcat (D, S)

# ifdef _LIBC

#  define MEMPCPY(D, S, N) __mempcpy (D, S, N)

# else

#  if HAVE_MEMPCPY

#   define MEMPCPY(D, S, N) mempcpy (D, S, N)

#  else

#   define MEMPCPY(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))

#  endif

# endif

# define MEMCHR(S, C, N) memchr (S, C, N)

# include "fnmatch_loop.c"

# if HANDLE_MULTIBYTE

#  define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))

#  define CHAR  wchar_t

#  define UCHAR wint_t

#  define INT   wint_t

#  define FCT   internal_fnwmatch

#  define EXT   ext_wmatch

#  define END   end_wpattern

#  define L_(CS)        L##CS

#  define BTOWC(C)      (C)

#  ifdef _LIBC

#   define STRLEN(S) __wcslen (S)

#   define STRCAT(D, S) __wcscat (D, S)

#   define MEMPCPY(D, S, N) __wmempcpy (D, S, N)

#  else

#   define STRLEN(S) wcslen (S)

#   define STRCAT(D, S) wcscat (D, S)

#   if HAVE_WMEMPCPY

#    define MEMPCPY(D, S, N) wmempcpy (D, S, N)

#   else

#    define MEMPCPY(D, S, N) (wmemcpy (D, S, N) + (N))

#   endif

#  endif

#  define MEMCHR(S, C, N) wmemchr (S, C, N)

#  define WIDE_CHAR_VERSION 1

#  undef IS_CHAR_CLASS

/* We have to convert the wide character string in a multibyte string.  But

   we know that the character class names consist of alphanumeric characters

   from the portable character set, and since the wide character encoding

   for a member of the portable character set is the same code point as

   its single-byte encoding, we can use a simplified method to convert the

   string to a multibyte character string.  */

static wctype_t

is_char_class (const wchar_t *wcs)

{

  char s[CHAR_CLASS_MAX_LENGTH + 1];

  char *cp = s;

  do

    {

      /* Test for a printable character from the portable character set.  */

#  ifdef _LIBC

      if (*wcs < 0x20 || *wcs > 0x7e

          || *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60)

        return (wctype_t) 0;

#  else

      switch (*wcs)

        {

        case L' ': case L'!': case L'"': case L'#': case L'%':

        case L'&': case L'\'': case L'(': case L')': case L'*':

        case L'+': case L',': case L'-': case L'.': case L'/':

        case L'0': case L'1': case L'2': case L'3': case L'4':

        case L'5': case L'6': case L'7': case L'8': case L'9':

        case L':': case L';': case L'<': case L'=': case L'>':

        case L'?':

        case L'A': case L'B': case L'C': case L'D': case L'E':

        case L'F': case L'G': case L'H': case L'I': case L'J':

        case L'K': case L'L': case L'M': case L'N': case L'O':

        case L'P': case L'Q': case L'R': case L'S': case L'T':

        case L'U': case L'V': case L'W': case L'X': case L'Y':

        case L'Z':

        case L'[': case L'\\': case L']': case L'^': case L'_':

        case L'a': case L'b': case L'c': case L'd': case L'e':

        case L'f': case L'g': case L'h': case L'i': case L'j':

        case L'k': case L'l': case L'm': case L'n': case L'o':

        case L'p': case L'q': case L'r': case L's': case L't':

        case L'u': case L'v': case L'w': case L'x': case L'y':

        case L'z': case L'{': case L'|': case L'}': case L'~':

          break;

        default:

          return (wctype_t) 0;

        }

#  endif

      /* Avoid overrunning the buffer.  */

      if (cp == s + CHAR_CLASS_MAX_LENGTH)

        return (wctype_t) 0;

      *cp++ = (char) *wcs++;

    }

  while (*wcs != L'\0');

  *cp = '\0';

#  ifdef _LIBC

  return __wctype (s);

#  else

  return wctype (s);

#  endif

}

#  define IS_CHAR_CLASS(string) is_char_class (string)

#  include "fnmatch_loop.c"

# endif

int

fnmatch (const char *pattern, const char *string, int flags)

{

# if HANDLE_MULTIBYTE

#  define ALLOCA_LIMIT 2000

  if (__builtin_expect (MB_CUR_MAX, 1) != 1)

    {

      mbstate_t ps;

      size_t patsize;

      size_t strsize;

      size_t totsize;

      wchar_t *wpattern;

      wchar_t *wstring;

      int res;

      /* Calculate the size needed to convert the strings to

         wide characters.  */

      memset (&ps, '\0', sizeof (ps));

      patsize = mbsrtowcs (NULL, &pattern, 0, &ps) + 1;

      if (__builtin_expect (patsize != 0, 1))

        {

          assert (mbsinit (&ps);;

          strsize = mbsrtowcs (NULL, &string, 0, &ps) + 1;

          if (__builtin_expect (strsize != 0, 1))

            {

              assert (mbsinit (&ps);;

              totsize = patsize + strsize;

              if (__builtin_expect (! (patsize <= totsize

                                       && totsize <= SIZE_MAX / sizeof (wchar_t)),

                                    0))

                {

                  errno = ENOMEM;

                  return -1;

                }

              /* Allocate room for the wide characters.  */

              if (__builtin_expect (totsize < ALLOCA_LIMIT, 1))

                wpattern = (wchar_t *) alloca (totsize * sizeof (wchar_t));

              else

                {

                  wpattern = malloc (totsize * sizeof (wchar_t));

                  if (__builtin_expect (! wpattern, 0))

                    {

                      errno = ENOMEM;

                      return -1;

                    }

                }

              wstring = wpattern + patsize;

              /* Convert the strings into wide characters.  */

              mbsrtowcs (wpattern, &pattern, patsize, &ps);

              assert (mbsinit (&ps);;

              mbsrtowcs (wstring, &string, strsize, &ps);

              res = internal_fnwmatch (wpattern, wstring, wstring + strsize - 1,

                                       flags & FNM_PERIOD, flags);

              if (__builtin_expect (! (totsize < ALLOCA_LIMIT), 0))

                free (wpattern);

              return res;

            }

        }

    }

# endif /* HANDLE_MULTIBYTE */

  return internal_fnmatch (pattern, string, string + strlen (string),

                           flags & FNM_PERIOD, flags);

}

# ifdef _LIBC

#  undef fnmatch

versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);

#  if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)

strong_alias (__fnmatch, __fnmatch_old)

compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0);

#  endif

libc_hidden_ver (__fnmatch, fnmatch)

# endif

#endif  /* _LIBC or not __GNU_LIBRARY__.  */