[PATCH] Regexp matching in grub

["Vladimir 'φ-coder/phcoder' Serbinenko" <phcoder@gmail.com>]

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Hello, I imported regexp from gnulib into grub. Available from
people/phcoder/regexp. Following changes required:
common.rmk Add:
pkglib_MODULES += regexp.mod
regexp_mod_SOURCES = gnulib/regex.c commands/regexp.c
regexp_mod_CFLAGS = $(COMMON_CFLAGS) -Wno-sign-compare -Wno-unused
regexp_mod_LDFLAGS = $(COMMON_LDFLAGS)
commands/regexp.c New file (attached)
gnulib/regcomp.c, gnulib/regex_internal.c, gnulib/regexec.c: Copied
verbatim from gnulib.
gnulib/regex.c: New file (attached). Based on file from gnulib, heavily
modified
gnulib/regex_internal.h. Copied from gnulib following modification needed:
--- /home/phcoder/repos/gnulib/lib/regex_internal.h    2009-11-19
14:02:55.406619037 +0100
+++ gnulib/regex_internal.h    2009-12-27 14:28:10.504789886 +0100
@@ -21,33 +21,6 @@
 #ifndef _REGEX_INTERNAL_H
 #define _REGEX_INTERNAL_H 1
 
-#include <assert.h>
-#include <ctype.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifdef _LIBC
-# include <langinfo.h>
-#else
-# include "localcharset.h"
-#endif
-#if defined HAVE_LOCALE_H || defined _LIBC
-# include <locale.h>
-#endif
-
-#include <wchar.h>
-#include <wctype.h>
-#include <stdint.h>
-#if defined _LIBC
-# include <bits/libc-lock.h>
-#else
-# define __libc_lock_init(NAME) do { } while (0)
-# define __libc_lock_lock(NAME) do { } while (0)
-# define __libc_lock_unlock(NAME) do { } while (0)
-#endif
-
 /* In case that the system doesn't have isblank().  */
 #if !defined _LIBC && ! (defined isblank || (HAVE_ISBLANK &&
HAVE_DECL_ISBLANK))
 # define isblank(ch) ((ch) == ' ' || (ch) == '\t')

include/grub/gnulib-wrap.h: New file
include/grub/regex.h: Copied from gnulib. Following modification:
--- /home/phcoder/repos/gnulib/lib/regex.h    2009-11-19
14:02:55.402619158 +0100
+++ include/grub/regex.h    2009-12-27 14:20:37.356524246 +0100
@@ -21,7 +21,7 @@
 #ifndef _REGEX_H
 #define _REGEX_H 1
 
-#include <sys/types.h>
+#include <grub/gnulib-wrap.h>
 
 /* Allow the use in C++ code.  */
 #ifdef __cplusplus

-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko


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/* regexp.c -- The regexp command.  */
/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 2005,2007  Free Software Foundation, Inc.
 *
 *  GRUB 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 of the License, or
 *  (at your option) any later version.
 *
 *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <grub/dl.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/command.h>
#include <grub/regex.h>

static grub_err_t
grub_cmd_regexp (grub_command_t cmd __attribute__ ((unused)),
		 int argc, char **args)
{
  int argn = 0;
  int matches = 0;
  regex_t regex;
  int ret;
  grub_size_t s;
  char *comperr;
  grub_err_t err;

  if (argc != 2)
    return grub_error (GRUB_ERR_BAD_ARGUMENT, "2 arguments expected");

  ret = regcomp (&regex, args[0], RE_SYNTAX_GNU_AWK);
  if (ret)
    goto fail;

  ret = regexec (&regex, args[1], 0, 0, 0);
  if (!ret)
    {
      regfree (&regex);
      return GRUB_ERR_NONE;
    }

 fail:
  s = regerror (ret, &regex, 0, 0);
  comperr = grub_malloc (s);
  if (!comperr)
    {
      regfree (&regex);
      return grub_errno;
    }
  regerror (ret, &regex, comperr, s);
  err = grub_error (GRUB_ERR_TEST_FAILURE, "%s", comperr);
  regfree (&regex);
  grub_free (comperr);
  return err;
}

static grub_command_t cmd;
\f
GRUB_MOD_INIT(regexp)
{
  cmd = grub_register_command ("regexp", grub_cmd_regexp,
			       "REGEXP STRING",
			       "Test if REGEXP matches STRING.");
}

GRUB_MOD_FINI(regexp)
{
  grub_unregister_command (cmd);
}

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/* Extended regular expression matching and search library.
   Copyright (C) 2002, 2003, 2005, 2006 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.

   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,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */

#include <grub/regex.h>

#include "regex_internal.h"

#include "regex_internal.c"
#include "regcomp.c"
#include "regexec.c"

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/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 2009  Free Software Foundation, Inc.
 *
 *  GRUB 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 of the License, or
 *  (at your option) any later version.
 *
 *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef GRUB_GNULIB_WRAP_H
#define GRUB_GNULIB_WRAP_H	1

#include <grub/mm.h>
#include <grub/misc.h>

typedef grub_size_t size_t;
typedef int bool;
static const bool true = 1;
static const bool false = 0;

#define assert(x) assert_real(__FILE__, __LINE__, x)

static inline void
assert_real (const char *file, int line, int cond)
{
  if (!cond)
    grub_fatal ("Assertion failed at %s:%d\n", file, line);
}

static inline char *
locale_charset (void)
{
  return "UTF-8";
}

#define MB_CUR_MAX 6

static inline void *
realloc (void *ptr, grub_size_t size)
{
  return grub_realloc (ptr, size);
}

static inline int
toupper (int c)
{
  return grub_toupper (c);
}

static inline int 
isspace (int c)
{
  return grub_isspace (c);
}

static inline int 
isdigit (int c)
{
  return grub_isdigit (c);
}

static inline int
islower (int c)
{
  return (c >= 'a' && c <= 'z');
}

static inline int
isupper (int c)
{
  return (c >= 'A' && c <= 'Z');
}

static inline int
isxdigit (int c)
{
  return (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')
    || (c >= '0' && c <= '9');
}

static inline int 
isprint (int c)
{
  return grub_isprint (c);
}

static inline int 
iscntrl (int c)
{
  return !grub_isprint (c);
}

static inline int 
isgraph (int c)
{
  return grub_isprint (c) && !grub_isspace (c);
}

static inline int
isalnum (int c)
{
  return grub_isalpha (c) || grub_isdigit (c);
}

static inline int 
ispunct (int c)
{
  return grub_isprint (c) && !grub_isspace (c) && !isalnum (c);
}

static inline int 
isalpha (int c)
{
  return grub_isalpha (c);
}

static inline int
tolower (int c)
{
  return grub_tolower (c);
}

static inline grub_size_t
strlen (const char *s)
{
  return grub_strlen (s);
}

static inline int 
strcmp (const char *s1, const char *s2)
{
  return grub_strcmp (s1, s2);
}

static inline void
abort (void)
{
  grub_abort ();
}

static inline void 
free (void *ptr)
{
  grub_free (ptr);
}

static inline void *
malloc (grub_size_t size)
{
  return grub_malloc (size);
}

static inline void *
calloc (grub_size_t size, grub_size_t nelem)
{
  return grub_zalloc (size * nelem);
}

#define ULONG_MAX GRUB_ULONG_MAX
#define UCHAR_MAX 0xff

/* UCS-4.  */
typedef grub_uint32_t wchar_t;

#undef __libc_lock_init
#define __libc_lock_init(x)
#undef __libc_lock_lock
#define __libc_lock_lock(x)
#undef __libc_lock_unlock
#define __libc_lock_unlock(x)

#endif

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