/* Copyright (C) 1991,1992,1993,1996,1997,1998,1999,2000,2001,2002,2003,2007

  Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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

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

/* This file comes from the GNU C Library and has been modified for use in

 * ProFTPD.

 *

 * Changes are released under the GNU Public License, version 2.

 * Copyright (C) 2000 MacGyver aka Habeeb J. Dihu <macgyver@tos.net>

 * Copyright (C) 2010-2026 The ProFTPD Project

 */

/* AIX requires this to be the first thing in the file.  */

#if defined _AIX && !defined __GNUC__

 #pragma alloca

#endif

#include <config.h>

/* Make alloca work the best possible way.  */

#ifdef __GNUC__

#define alloca __builtin_alloca

#else /* not __GNUC__ */

#if HAVE_ALLOCA_H

#include <alloca.h>

#else /* not __GNUC__ or HAVE_ALLOCA_H */

#ifndef _AIX /* Already did AIX, up at the top.  */

char *alloca ();

#endif /* not _AIX */

#endif /* not HAVE_ALLOCA_H */

#endif /* not __GNUC__ */

/* Necessary for platforms which don't use __alloca. */

#define __alloca alloca

/* Required to tell conf.h not to include the standard ProFTPD

 * header files

 */

#define __PROFTPD_SUPPORT_LIBRARY

#include "conf.h"

#include "base.h"

#if 0 /* Not used in ProFTPD */

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

#ifndef _GNU_SOURCE

# define _GNU_SOURCE  1

#endif

#include <assert.h>

#include <errno.h>

#include <fnmatch.h>

#include <ctype.h>

#if HAVE_STRING_H || defined _LIBC

# include <string.h>

#else

# include <strings.h>

#endif

#if defined STDC_HEADERS || defined _LIBC

# include <stdlib.h>

#endif

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

   support user defined character classes.  */

#if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)

/* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>.  */

# include <wchar.h>

# include <wctype.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

#endif /* Not used in ProFTPD */

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

#define NO_LEADING_PERIOD(flags) \

  ((flags & (PR_FNM_FILE_NAME | PR_FNM_PERIOD)) == (PR_FNM_FILE_NAME | PR_FNM_PERIOD))

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

   actually compiling the library itself.  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.  */

/* The comment above notwithstanding, we do want to use our own version to

 * ensure cross-platform compatibility...among other things.

 */

#undef _LIBC

#undef __GNU_LIBRARY__

/* Provide an implementation of the gcc-specific __builtin_expect macro,

 * for the non-gcc compilers out there.

 */

#ifndef __builtin_expect

# define __builtin_expect(e, n) (e)

#endif /* __builtin_expect */

#if defined _LIBC || !defined __GNU_LIBRARY__

# if defined STDC_HEADERS || !defined isascii

#  define ISASCII(c) 1

# else

#  define ISASCII(c) isascii(c)

# endif

# ifdef isblank

#  define ISBLANK(c) (ISASCII (c) && isblank (c))

# else

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

# endif

# ifdef isgraph

#  define ISGRAPH(c) (ISASCII (c) && isgraph (c))

# else

#  define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))

# endif

# define ISPRINT(c) (ISASCII (c) && isprint (c))

# define ISDIGIT(c) (ISASCII (c) && isdigit (c))

# define ISALNUM(c) (ISASCII (c) && isalnum (c))

# define ISALPHA(c) (ISASCII (c) && isalpha (c))

# define ISCNTRL(c) (ISASCII (c) && iscntrl (c))

# define ISLOWER(c) (ISASCII (c) && islower (c))

# define ISPUNCT(c) (ISASCII (c) && ispunct (c))

# define ISSPACE(c) (ISASCII (c) && isspace (c))

# define ISUPPER(c) (ISASCII (c) && isupper (c))

# define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))

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

# define HANDLE_MULTIBYTE       0

# if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)

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

   and the functions from ISO C amendement 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.  */

# ifndef errno

extern int errno;

# endif

/* Global variable.  */

static int posixly_correct;

# if HANDLE_MULTIBYTE && !defined HAVE___STRCHRNUL && !defined _LIBC

static wchar_t *

__wcschrnul (const wchar_t *s, wint_t c)

{

  wchar_t *result = wcschr (s, c);

  if (result == NULL)

    result = wcschr (s, '\0');

  return result;

}

# endif

# 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.  */

# ifdef _LIBC

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

# else

#  define FOLD(c) ((flags & PR_FNM_CASEFOLD) && ISUPPER (c) ? tolower (c) : (c))

# endif

# define CHAR char

# define UCHAR  unsigned char

# define INT  int

# define FCT  internal_fnmatch

# define EXT  ext_match

# define END  end_pattern

# define STRUCT fnmatch_struct

# 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 HAVE_MEMPCPY

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

# else

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

# endif

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

# define STRCOLL(S1, S2) strcoll (S1, S2)

# include "pr_fnmatch_loop.c"

# if HANDLE_MULTIBYTE

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

#  ifdef _LIBC

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

#  else

#   define FOLD(c) ((flags & PR_FNM_CASEFOLD) && ISUPPER (c) ? towlower (c) : (c))

#  endif

#  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 STRUCT fnwmatch_struct

#  define L(CS) L##CS

#  define BTOWC(C)  (C)

#  define STRLEN(S) __wcslen (S)

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

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

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

#  define STRCOLL(S1, S2) wcscoll (S1, S2)

#  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 "pr_fnmatch_loop.c"

# endif

int

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

{

# if HANDLE_MULTIBYTE

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

    {

      mbstate_t ps;

      size_t n;

      const char *p;

      wchar_t *wpattern;

      wchar_t *wstring;

      /* Convert the strings into wide characters.  */

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

      p = pattern;

#ifdef _LIBC

      n = strnlen (pattern, 1024);

#else

      n = strlen (pattern);

#endif

      if (__builtin_expect (n < 1024, 1))

  {

    wpattern = (wchar_t *) __alloca ((n + 1) * sizeof (wchar_t));

    n = mbsrtowcs (wpattern, &p, n + 1, &ps);

    if (__builtin_expect (n == (size_t) -1, 0))

      /* Something wrong.

         XXX Do we have to set `errno' to something which mbsrtows hasn't

         already done?  */

      return -1;

    if (p)

      {

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

        goto prepare_wpattern;

      }

  }

      else

  {

  prepare_wpattern:

    n = mbsrtowcs (NULL, &pattern, 0, &ps);

    if (__builtin_expect (n == (size_t) -1, 0))

      /* Something wrong.

         XXX Do we have to set `errno' to something which mbsrtows hasn't

         already done?  */

      return -1;

    wpattern = (wchar_t *) __alloca ((n + 1) * sizeof (wchar_t));

    assert (mbsinit (&ps));

    (void) mbsrtowcs (wpattern, &pattern, n + 1, &ps);

  }

      assert (mbsinit (&ps));

#ifdef _LIBC

      n = strnlen (string, 1024);

#else

      n = strlen (string);

#endif

      p = string;

      if (__builtin_expect (n < 1024, 1))

  {

    wstring = (wchar_t *) __alloca ((n + 1) * sizeof (wchar_t));

    n = mbsrtowcs (wstring, &p, n + 1, &ps);

    if (__builtin_expect (n == (size_t) -1, 0))

      /* Something wrong.

         XXX Do we have to set `errno' to something which mbsrtows hasn't

         already done?  */

      return -1;

    if (p)

      {

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

        goto prepare_wstring;

      }

  }

      else

  {

  prepare_wstring:

    n = mbsrtowcs (NULL, &string, 0, &ps);

    if (__builtin_expect (n == (size_t) -1, 0))

      /* Something wrong.

         XXX Do we have to set `errno' to something which mbsrtows hasn't

         already done?  */

      return -1;

    wstring = (wchar_t *) __alloca ((n + 1) * sizeof (wchar_t));

    assert (mbsinit (&ps));

    (void) mbsrtowcs (wstring, &string, n + 1, &ps);

  }

      return internal_fnwmatch (wpattern, wstring, wstring + n,

        flags & PR_FNM_PERIOD, flags, NULL);

    }

# endif  /* mbstate_t and mbsrtowcs or _LIBC.  */

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

         flags & PR_FNM_PERIOD, flags, NULL);

}

#endif  /* _LIBC or not __GNU_LIBRARY__.  */