[thirdparty/gcc.git] / libiberty / fnmatch.c

/* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.

NOTE: The canonical source of this file is maintained with the GNU C Library.
Bugs can be reported to bug-glibc@prep.ai.mit.edu.

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 2, 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, write to the Free Software
Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#ifdef HAVE_CONFIG_H
#if defined (CONFIG_BROKETS)
/* We use <config.h> instead of "config.h" so that a compilation
   using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
   (which it would do because it found this file in $srcdir).  */
#include <config.h>
#else
#include "config.h"
#endif
#endif


#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

/* This code to undef const added in libiberty.  */
#ifndef __STDC__
/* This is a separate conditional since some stdc systems
   reject `defined (const)'.  */
#ifndef const
#define const
#endif
#endif

#include <errno.h>
#include <fnmatch.h>
#include <ctype.h>


/* 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.  */

#if defined (_LIBC) || !defined (__GNU_LIBRARY__)


#if !defined(__GNU_LIBRARY__) && !defined(STDC_HEADERS)
extern int errno;
#endif

/* Match STRING against the filename pattern PATTERN, returning zero if
   it matches, nonzero if not.  */
int
fnmatch (pattern, string, flags)
     const char *pattern;
     const char *string;
     int flags;
{
  register const char *p = pattern, *n = string;
  register unsigned char c;

/* Note that this evalutes C many times.  */
#define FOLD(c)	((flags & FNM_CASEFOLD) && isupper (c) ? tolower (c) : (c))

  while ((c = *p++) != '\0')
    {
      c = FOLD (c);

      switch (c)
	{
	case '?':
	  if (*n == '\0')
	    return FNM_NOMATCH;
	  else if ((flags & FNM_FILE_NAME) && *n == '/')
	    return FNM_NOMATCH;
	  else if ((flags & FNM_PERIOD) && *n == '.' &&
		   (n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
	    return FNM_NOMATCH;
	  break;

	case '\\':
	  if (!(flags & FNM_NOESCAPE))
	    {
	      c = *p++;
	      c = FOLD (c);
	    }
	  if (FOLD ((unsigned char)*n) != c)
	    return FNM_NOMATCH;
	  break;

	case '*':
	  if ((flags & FNM_PERIOD) && *n == '.' &&
	      (n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
	    return FNM_NOMATCH;

	  for (c = *p++; c == '?' || c == '*'; c = *p++, ++n)
	    if (((flags & FNM_FILE_NAME) && *n == '/') ||
		(c == '?' && *n == '\0'))
	      return FNM_NOMATCH;

	  if (c == '\0')
	    return 0;

	  {
	    unsigned char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c;
	    c1 = FOLD (c1);
	    for (--p; *n != '\0'; ++n)
	      if ((c == '[' || FOLD ((unsigned char)*n) == c1) &&
		  fnmatch (p, n, flags & ~FNM_PERIOD) == 0)
		return 0;
	    return FNM_NOMATCH;
	  }

	case '[':
	  {
	    /* Nonzero if the sense of the character class is inverted.  */
	    register int not;

	    if (*n == '\0')
	      return FNM_NOMATCH;

	    if ((flags & FNM_PERIOD) && *n == '.' &&
		(n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
	      return FNM_NOMATCH;

	    not = (*p == '!' || *p == '^');
	    if (not)
	      ++p;

	    c = *p++;
	    for (;;)
	      {
		register unsigned char cstart = c, cend = c;

		if (!(flags & FNM_NOESCAPE) && c == '\\')
		  cstart = cend = *p++;

		cstart = cend = FOLD (cstart);

		if (c == '\0')
		  /* [ (unterminated) loses.  */
		  return FNM_NOMATCH;

		c = *p++;
		c = FOLD (c);

		if ((flags & FNM_FILE_NAME) && c == '/')
		  /* [/] can never match.  */
		  return FNM_NOMATCH;

		if (c == '-' && *p != ']')
		  {
		    cend = *p++;
		    if (!(flags & FNM_NOESCAPE) && cend == '\\')
		      cend = *p++;
		    if (cend == '\0')
		      return FNM_NOMATCH;
		    cend = FOLD (cend);

		    c = *p++;
		  }

		if (FOLD ((unsigned char)*n) >= cstart
		    && FOLD ((unsigned char)*n) <= cend)
		  goto matched;

		if (c == ']')
		  break;
	      }
	    if (!not)
	      return FNM_NOMATCH;
	    break;

	  matched:;
	    /* Skip the rest of the [...] that already matched.  */
	    while (c != ']')
	      {
		if (c == '\0')
		  /* [... (unterminated) loses.  */
		  return FNM_NOMATCH;

		c = *p++;
		if (!(flags & FNM_NOESCAPE) && c == '\\')
		  /* XXX 1003.2d11 is unclear if this is right.  */
		  ++p;
	      }
	    if (not)
	      return FNM_NOMATCH;
	  }
	  break;

	default:
	  if (c != FOLD ((unsigned char)*n))
	    return FNM_NOMATCH;
	}

      ++n;
    }

  if (*n == '\0')
    return 0;

  if ((flags & FNM_LEADING_DIR) && *n == '/')
    /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz".  */
    return 0;

  return FNM_NOMATCH;
}

#endif	/* _LIBC or not __GNU_LIBRARY__.  */
Commit	Line	Data
28e9041c	1	/* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
	2
	3	NOTE: The canonical source of this file is maintained with the GNU C Library.
	4	Bugs can be reported to bug-glibc@prep.ai.mit.edu.
	5
	6	This program is free software; you can redistribute it and/or modify it
	7	under the terms of the GNU General Public License as published by the
	8	Free Software Foundation; either version 2, or (at your option) any
	9	later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
78fec93b	18	Foundation, 59 Temple Place - Suite 330,
78fec93b	19	Boston, MA 02111-1307, USA. */
28e9041c	20
	21	#ifdef HAVE_CONFIG_H
	22	#if defined (CONFIG_BROKETS)
	23	/* We use <config.h> instead of "config.h" so that a compilation
	24	using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
	25	(which it would do because it found this file in $srcdir). */
	26	#include <config.h>
	27	#else
	28	#include "config.h"
	29	#endif
	30	#endif
	31
	32
	33	#ifndef _GNU_SOURCE
	34	#define _GNU_SOURCE
	35	#endif
	36
	37	/* This code to undef const added in libiberty. */
	38	#ifndef __STDC__
	39	/* This is a separate conditional since some stdc systems
	40	reject `defined (const)'. */
	41	#ifndef const
	42	#define const
	43	#endif
	44	#endif
	45
	46	#include <errno.h>
	47	#include <fnmatch.h>
	48	#include <ctype.h>
	49
	50
	51	/* Comment out all this code if we are using the GNU C Library, and are not
	52	actually compiling the library itself. This code is part of the GNU C
	53	Library, but also included in many other GNU distributions. Compiling
	54	and linking in this code is a waste when using the GNU C library
	55	(especially if it is a shared library). Rather than having every GNU
	56	program understand `configure --with-gnu-libc' and omit the object files,
	57	it is simpler to just do this in the source for each such file. */
	58
	59	#if defined (_LIBC) \|\| !defined (__GNU_LIBRARY__)
	60
	61
	62	#if !defined(__GNU_LIBRARY__) && !defined(STDC_HEADERS)
	63	extern int errno;
	64	#endif
	65
	66	/* Match STRING against the filename pattern PATTERN, returning zero if
	67	it matches, nonzero if not. */
	68	int
	69	fnmatch (pattern, string, flags)
	70	const char *pattern;
	71	const char *string;
	72	int flags;
	73	{
	74	register const char p = pattern, n = string;
7c8c70e9	75	register unsigned char c;
28e9041c	76
	77	/* Note that this evalutes C many times. */
	78	#define FOLD(c) ((flags & FNM_CASEFOLD) && isupper (c) ? tolower (c) : (c))
	79
	80	while ((c = *p++) != '\0')
	81	{
	82	c = FOLD (c);
	83
	84	switch (c)
	85	{
	86	case '?':
	87	if (*n == '\0')
	88	return FNM_NOMATCH;
	89	else if ((flags & FNM_FILE_NAME) && *n == '/')
	90	return FNM_NOMATCH;
	91	else if ((flags & FNM_PERIOD) && *n == '.' &&
	92	(n == string \|\| ((flags & FNM_FILE_NAME) && n[-1] == '/')))
	93	return FNM_NOMATCH;
	94	break;
	95
	96	case '\\':
	97	if (!(flags & FNM_NOESCAPE))
	98	{
	99	c = *p++;
	100	c = FOLD (c);
	101	}
7c8c70e9	102	if (FOLD ((unsigned char)*n) != c)
28e9041c	103	return FNM_NOMATCH;
	104	break;
	105
	106	case '*':
	107	if ((flags & FNM_PERIOD) && *n == '.' &&
	108	(n == string \|\| ((flags & FNM_FILE_NAME) && n[-1] == '/')))
	109	return FNM_NOMATCH;
	110
	111	for (c = p++; c == '?' \|\| c == ''; c = *p++, ++n)
	112	if (((flags & FNM_FILE_NAME) && *n == '/') \|\|
	113	(c == '?' && *n == '\0'))
	114	return FNM_NOMATCH;
	115
	116	if (c == '\0')
	117	return 0;
	118
	119	{
7c8c70e9	120	unsigned char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c;
28e9041c	121	c1 = FOLD (c1);
28e9041c	122	for (--p; *n != '\0'; ++n)
7c8c70e9	123	if ((c == '[' \|\| FOLD ((unsigned char)*n) == c1) &&
28e9041c	124	fnmatch (p, n, flags & ~FNM_PERIOD) == 0)
	125	return 0;
	126	return FNM_NOMATCH;
	127	}
	128
	129	case '[':
	130	{
	131	/* Nonzero if the sense of the character class is inverted. */
	132	register int not;
	133
	134	if (*n == '\0')
	135	return FNM_NOMATCH;
	136
	137	if ((flags & FNM_PERIOD) && *n == '.' &&
	138	(n == string \|\| ((flags & FNM_FILE_NAME) && n[-1] == '/')))
	139	return FNM_NOMATCH;
	140
	141	not = (p == '!' \|\| p == '^');
	142	if (not)
	143	++p;
	144
	145	c = *p++;
	146	for (;;)
	147	{
7c8c70e9	148	register unsigned char cstart = c, cend = c;
28e9041c	149
	150	if (!(flags & FNM_NOESCAPE) && c == '\\')
	151	cstart = cend = *p++;
	152
	153	cstart = cend = FOLD (cstart);
	154
	155	if (c == '\0')
	156	/* [ (unterminated) loses. */
	157	return FNM_NOMATCH;
	158
	159	c = *p++;
	160	c = FOLD (c);
	161
	162	if ((flags & FNM_FILE_NAME) && c == '/')
	163	/* [/] can never match. */
	164	return FNM_NOMATCH;
	165
	166	if (c == '-' && *p != ']')
	167	{
	168	cend = *p++;
	169	if (!(flags & FNM_NOESCAPE) && cend == '\\')
	170	cend = *p++;
	171	if (cend == '\0')
	172	return FNM_NOMATCH;
	173	cend = FOLD (cend);
	174
	175	c = *p++;
	176	}
	177
7c8c70e9	178	if (FOLD ((unsigned char)*n) >= cstart
7c8c70e9	179	&& FOLD ((unsigned char)*n) <= cend)
28e9041c	180	goto matched;
	181
	182	if (c == ']')
	183	break;
	184	}
	185	if (!not)
	186	return FNM_NOMATCH;
	187	break;
	188
	189	matched:;
	190	/* Skip the rest of the [...] that already matched. */
	191	while (c != ']')
	192	{
	193	if (c == '\0')
	194	/* [... (unterminated) loses. */
	195	return FNM_NOMATCH;
	196
	197	c = *p++;
	198	if (!(flags & FNM_NOESCAPE) && c == '\\')
	199	/* XXX 1003.2d11 is unclear if this is right. */
	200	++p;
	201	}
	202	if (not)
	203	return FNM_NOMATCH;
	204	}
	205	break;
	206
	207	default:
7c8c70e9	208	if (c != FOLD ((unsigned char)*n))
28e9041c	209	return FNM_NOMATCH;
	210	}
	211
	212	++n;
	213	}
	214
	215	if (*n == '\0')
	216	return 0;
	217
	218	if ((flags & FNM_LEADING_DIR) && *n == '/')
	219	/* The FNM_LEADING_DIR flag says that "foo" matches "foobar/frobozz". /
	220	return 0;
	221
	222	return FNM_NOMATCH;
	223	}
	224
	225	#endif /* _LIBC or not __GNU_LIBRARY__. */