PC World Komputer 1999 March/PCWK3A99.iso/Linux/DDD331/DDD-3_1_.000/DDD-3_1_/ddd-3.1.1/libiberty/fnmatch.c

C/C++ Source or Header | 1997-12-15 | 5.3 KB | 224 lines

/* 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 [e-mail].

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, 675 Mass Ave, Cambridge, MA 02139, 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 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 (*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;

      {
        char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c;
        c1 = FOLD (c1);
        for (--p; *n != '\0'; ++n)
          if ((c == '[' || FOLD (*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 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 (*n) >= cstart && FOLD (*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 (*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__.  */