posix: Sync fnmatch with gnulib

It sync with gnulib commit 43ee1a6bf.

Checked on x86_64-linux-gnu.

1 files changed, 223 insertions, 325 deletions

diff --git a/posix/fnmatch.c b/posix/fnmatch.c
index a996eb4..5896812 100644
--- a/posix/fnmatch.c
+++ b/posix/fnmatch.c
@@ -15,38 +15,29 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#if HAVE_CONFIG_H
-# include <config.h>
+#ifndef _LIBC
+# include <libc-config.h>
 #endif
 
 /* Enable GNU extensions in fnmatch.h.  */
 #ifndef _GNU_SOURCE
-# define _GNU_SOURCE	1
+# define _GNU_SOURCE    1
 #endif
 
+#include <fnmatch.h>
+
 #include <assert.h>
 #include <errno.h>
-#include <fnmatch.h>
 #include <ctype.h>
 #include <string.h>
-
-#if defined STDC_HEADERS || defined _LIBC
-# include <stdlib.h>
-#endif
-
-#ifdef _LIBC
+#include <stdlib.h>
+#if defined _LIBC || HAVE_ALLOCA
 # include <alloca.h>
-#else
-# define alloca_account(size., var) alloca (size)
-#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
+#include <wchar.h>
+#include <wctype.h>
+#include <stddef.h>
+#include <stdbool.h>
 
 /* We need some of the locale data (the collation sequence information)
    but there is no interface to get this information in general.  Therefore
@@ -57,199 +48,125 @@
 # include <shlib-compat.h>
 
 # define CONCAT(a,b) __CONCAT(a,b)
+# define btowc __btowc
+# define iswctype __iswctype
 # define mbsrtowcs __mbsrtowcs
+# define mempcpy __mempcpy
+# define strnlen __strnlen
+# define towlower __towlower
+# define wcscat __wcscat
+# define wcslen __wcslen
+# define wctype __wctype
+# define wmemchr __wmemchr
+# define wmempcpy __wmempcpy
 # define fnmatch __fnmatch
 extern int fnmatch (const char *pattern, const char *string, int flags);
 #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.  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.  */
+#ifdef _LIBC
+# if (__GNUC__ >= 7) || (__clang_major__ >= 10)
+#  define FALLTHROUGH __attribute__ ((__fallthrough__))
+# else
+#  define FALLTHROUGH ((void) 0)
+# endif
+#else
+# include "attribute.h"
+#endif
 
-#if defined _LIBC || !defined __GNU_LIBRARY__
+#include <intprops.h>
+#include <flexmember.h>
 
+#ifdef _LIBC
+typedef ptrdiff_t idx_t;
+#else
+# include "idx.h"
+#endif
 
-# if defined STDC_HEADERS || !defined isascii
-#  define ISASCII(c) 1
-# else
-#  define ISASCII(c) isascii(c)
-# 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))
 
-# ifdef isblank
-#  define ISBLANK(c) (ISASCII (c) && isblank (c))
+#ifndef _LIBC
+# if HAVE_ALLOCA
+/* The OS usually guarantees only one guard page at the bottom of the stack,
+   and a page size can be as small as 4096 bytes.  So we cannot safely
+   allocate anything larger than 4096 bytes.  Also care for the possibility
+   of a few compiler-allocated temporary stack slots.  */
+#  define __libc_use_alloca(n) ((n) < 4032)
 # 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))
+/* Just use malloc.  */
+#  define __libc_use_alloca(n) false
+#  undef alloca
+#  define alloca(n) malloc (n)
 # endif
+# define alloca_account(size, avar) ((avar) += (size), alloca (size))
+#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))
-
-# 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
+/* Provide support for user-defined character classes, based on the functions
+   from ISO C 90 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
+# define CHAR_CLASS_MAX_LENGTH 256
+#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
+#define IS_CHAR_CLASS(string) wctype (string)
 
 /* Avoid depending on library functions or files
    whose names are inconsistent.  */
 
-# if !defined _LIBC && !defined getenv
-extern char *getenv ();
-# endif
-
-# ifndef errno
-extern int errno;
-# endif
-
 /* Global variable.  */
 static int posixly_correct;
 
-/* This function doesn't exist on most systems.  */
-
-# if !defined HAVE___STRCHRNUL && !defined _LIBC
-static char *
-__strchrnul (const char *s, int c)
-{
-  char *result = strchr (s, c);
-  if (result == NULL)
-    result = strchr (s, '\0');
-  return result;
-}
-# endif
-
-# 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
-
 /* Note that this evaluates C many times.  */
-# ifdef _LIBC
-#  define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
-# else
-#  define FOLD(c) ((flags & 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)
-# define MEMPCPY(D, S, N) __mempcpy (D, S, N)
-# define MEMCHR(S, C, N) memchr (S, C, N)
-# define STRCOLL(S1, S2) strcoll (S1, S2)
-# define WIDE_CHAR_VERSION 0
+#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 STRUCT  fnmatch_struct
+#define L_(CS)  CS
+#define BTOWC(C) btowc (C)
+#define STRLEN(S) strlen (S)
+#define STRCAT(D, S) strcat (D, S)
+#define MEMPCPY(D, S, N) mempcpy (D, S, N)
+#define MEMCHR(S, C, N) memchr (S, C, N)
+#define WIDE_CHAR_VERSION 0
+#ifdef _LIBC
 # include <locale/weight.h>
 # define FINDIDX findidx
-# include "fnmatch_loop.c"
-
-
-# if HANDLE_MULTIBYTE
-/* Note that this evaluates C many times.  */
-#  ifdef _LIBC
-#   define FOLD(c) ((flags & FNM_CASEFOLD) ? __towlower (c) : (c))
-#  else
-#   define FOLD(c) ((flags & 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)
-#  ifdef _LIBC
-#   define WMEMCMP(S1, S2, N) __wmemcmp (S1, S2, N)
-#  else
-#   define WMEMCMP(S1, S2, N) wmemcmp (S1, S2, N)
-#  endif
-#  define WIDE_CHAR_VERSION 1
+#endif
+#include "fnmatch_loop.c"
+
+
+#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)
+#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 WIDE_CHAR_VERSION 1
+#ifdef _LIBC
 /* Change the name the header defines so it doesn't conflict with
    the <locale/weight.h> version included above.  */
-#  define findidx findidxwc
-#  include <locale/weightwc.h>
-#  undef findidx
-#  define FINDIDX findidxwc
+# define findidx findidxwc
+# include <locale/weightwc.h>
+# undef findidx
+# define FINDIDX findidxwc
+#endif
 
-#  undef IS_CHAR_CLASS
+#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
@@ -265,42 +182,42 @@ is_char_class (const wchar_t *wcs)
   do
     {
       /* Test for a printable character from the portable character set.  */
-#  ifdef _LIBC
+#ifdef _LIBC
       if (*wcs < 0x20 || *wcs > 0x7e
-	  || *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60)
-	return (wctype_t) 0;
-#  else
+          || *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
+        {
+        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;
+        return (wctype_t) 0;
 
       *cp++ = (char) *wcs++;
     }
@@ -308,23 +225,17 @@ is_char_class (const wchar_t *wcs)
 
   *cp = '\0';
 
-#  ifdef _LIBC
-  return __wctype (s);
-#  else
   return wctype (s);
-#  endif
 }
-#  define IS_CHAR_CLASS(string) is_char_class (string)
+#define IS_CHAR_CLASS(string) is_char_class (string)
 
-#  include "fnmatch_loop.c"
-# endif
+#include "fnmatch_loop.c"
 
 
 int
 fnmatch (const char *pattern, const char *string, int flags)
 {
-# if HANDLE_MULTIBYTE
-  if (__builtin_expect (MB_CUR_MAX, 1) != 1)
+  if (__glibc_unlikely (MB_CUR_MAX != 1))
     {
       mbstate_t ps;
       size_t n;
@@ -338,126 +249,113 @@ fnmatch (const char *pattern, const char *string, int flags)
       /* Convert the strings into wide characters.  */
       memset (&ps, '\0', sizeof (ps));
       p = pattern;
-#ifdef _LIBC
-      n = __strnlen (pattern, 1024);
-#else
-      n = strlen (pattern);
-#endif
+      n = strnlen (pattern, 1024);
       if (__glibc_likely (n < 1024))
-	{
-	  wpattern = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
-						 alloca_used);
-	  n = mbsrtowcs (wpattern, &p, n + 1, &ps);
-	  if (__glibc_unlikely (n == (size_t) -1))
-	    /* 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;
-	    }
-	}
+        {
+          wpattern = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
+                                                 alloca_used);
+          n = mbsrtowcs (wpattern, &p, n + 1, &ps);
+          if (__glibc_unlikely (n == (size_t) -1))
+            /* 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 (__glibc_unlikely (n == (size_t) -1))
-	    /* Something wrong.
-	       XXX Do we have to set `errno' to something which mbsrtows hasn't
-	       already done?  */
-	    return -1;
-	  if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
-	    {
-	      __set_errno (ENOMEM);
-	      return -2;
-	    }
-	  wpattern_malloc = wpattern
-	    = (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
-	  assert (mbsinit (&ps));
-	  if (wpattern == NULL)
-	    return -2;
-	  (void) mbsrtowcs (wpattern, &pattern, n + 1, &ps);
-	}
+        {
+        prepare_wpattern:
+          n = mbsrtowcs (NULL, &pattern, 0, &ps);
+          if (__glibc_unlikely (n == (size_t) -1))
+            /* Something wrong.
+               XXX Do we have to set 'errno' to something which mbsrtows hasn't
+               already done?  */
+            return -1;
+          if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
+            {
+              __set_errno (ENOMEM);
+              return -2;
+            }
+          wpattern_malloc = wpattern
+            = (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
+          assert (mbsinit (&ps));
+          if (wpattern == NULL)
+            return -2;
+          (void) mbsrtowcs (wpattern, &pattern, n + 1, &ps);
+        }
 
       assert (mbsinit (&ps));
-#ifdef _LIBC
-      n = __strnlen (string, 1024);
-#else
-      n = strlen (string);
-#endif
+      n = strnlen (string, 1024);
       p = string;
       if (__glibc_likely (n < 1024))
-	{
-	  wstring = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
-						alloca_used);
-	  n = mbsrtowcs (wstring, &p, n + 1, &ps);
-	  if (__glibc_unlikely (n == (size_t) -1))
-	    {
-	      /* Something wrong.
-		 XXX Do we have to set `errno' to something which
-		 mbsrtows hasn't already done?  */
-	    free_return:
-	      free (wpattern_malloc);
-	      return -1;
-	    }
-	  if (p)
-	    {
-	      memset (&ps, '\0', sizeof (ps));
-	      goto prepare_wstring;
-	    }
-	}
+        {
+          wstring = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
+                                                alloca_used);
+          n = mbsrtowcs (wstring, &p, n + 1, &ps);
+          if (__glibc_unlikely (n == (size_t) -1))
+            {
+              /* Something wrong.
+                 XXX Do we have to set 'errno' to something which
+                 mbsrtows hasn't already done?  */
+            free_return:
+              free (wpattern_malloc);
+              return -1;
+            }
+          if (p)
+            {
+              memset (&ps, '\0', sizeof (ps));
+              goto prepare_wstring;
+            }
+        }
       else
-	{
-	prepare_wstring:
-	  n = mbsrtowcs (NULL, &string, 0, &ps);
-	  if (__glibc_unlikely (n == (size_t) -1))
-	    /* Something wrong.
-	       XXX Do we have to set `errno' to something which mbsrtows hasn't
-	       already done?  */
-	    goto free_return;
-	  if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
-	    {
-	      free (wpattern_malloc);
-	      __set_errno (ENOMEM);
-	      return -2;
-	    }
-
-	  wstring_malloc = wstring
-	    = (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
-	  if (wstring == NULL)
-	    {
-	      free (wpattern_malloc);
-	      return -2;
-	    }
-	  assert (mbsinit (&ps));
-	  (void) mbsrtowcs (wstring, &string, n + 1, &ps);
-	}
+        {
+        prepare_wstring:
+          n = mbsrtowcs (NULL, &string, 0, &ps);
+          if (__glibc_unlikely (n == (size_t) -1))
+            /* Something wrong.
+               XXX Do we have to set 'errno' to something which mbsrtows hasn't
+               already done?  */
+            goto free_return;
+          if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
+            {
+              free (wpattern_malloc);
+              __set_errno (ENOMEM);
+              return -2;
+            }
+
+          wstring_malloc = wstring
+            = (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
+          if (wstring == NULL)
+            {
+              free (wpattern_malloc);
+              return -2;
+            }
+          assert (mbsinit (&ps));
+          (void) mbsrtowcs (wstring, &string, n + 1, &ps);
+        }
 
       int res = internal_fnwmatch (wpattern, wstring, wstring + n,
-				   flags & FNM_PERIOD, flags, NULL,
-				   alloca_used);
+                                   flags & FNM_PERIOD, flags, NULL,
+                                   alloca_used);
 
       free (wstring_malloc);
       free (wpattern_malloc);
 
       return res;
     }
-# endif  /* mbstate_t and mbsrtowcs or _LIBC.  */
 
   return internal_fnmatch (pattern, string, string + strlen (string),
-			   flags & FNM_PERIOD, flags, NULL, 0);
+                           flags & FNM_PERIOD, flags, NULL, 0);
 }
 
-# ifdef _LIBC
-#  undef fnmatch
+#undef fnmatch
 versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);
-#  if SHLIB_COMPAT(libc, GLIBC_2_0, 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
+#endif
 libc_hidden_ver (__fnmatch, fnmatch)
-# endif
-
-#endif	/* _LIBC or not __GNU_LIBRARY__.  */