Line data    Source code

       1             : /* Locale-specific memory comparison.
       2             : 
       3             :    Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
       4             : 
       5             :    This program is free software: you can redistribute it and/or modify
       6             :    it under the terms of the GNU General Public License as published by
       7             :    the Free Software Foundation; either version 3 of the License, or
       8             :    (at your option) any later version.
       9             : 
      10             :    This program is distributed in the hope that it will be useful,
      11             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      12             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13             :    GNU General Public License for more details.
      14             : 
      15             :    You should have received a copy of the GNU General Public License
      16             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      17             : 
      18             : /* Contributed by Paul Eggert <eggert@twinsun.com>.  */
      19             : 
      20             : #include <config.h>
      21             : 
      22             : #include <errno.h>
      23             : #include <stdlib.h>
      24             : 
      25             : #include "gettext.h"
      26             : #define _(msgid) gettext (msgid)
      27             : 
      28             : #include "error.h"
      29             : #include "exitfail.h"
      30             : #include "memcoll.h"
      31             : #include "quotearg.h"
      32             : #include "xmemcoll.h"
      33             : 
      34             : /* Compare S1 (with length S1LEN) and S2 (with length S2LEN) according
      35             :    to the LC_COLLATE locale.  S1 and S2 do not overlap, and are not
      36             :    adjacent.  Temporarily modify the bytes after S1 and S2, but
      37             :    restore their original contents before returning.  Report an error
      38             :    and exit if there is an error.  */
      39             : 
      40             : int
      41           0 : xmemcoll (char *s1, size_t s1len, char *s2, size_t s2len)
      42             : {
      43           0 :   int diff = memcoll (s1, s1len, s2, s2len);
      44           0 :   int collation_errno = errno;
      45             : 
      46           0 :   if (collation_errno)
      47             :     {
      48           0 :       error (0, collation_errno, _("string comparison failed"));
      49           0 :       error (0, 0, _("Set LC_ALL='C' to work around the problem."));
      50           0 :       error (exit_failure, 0,
      51             :              _("The strings compared were %s and %s."),
      52             :              quotearg_n_style_mem (0, locale_quoting_style, s1, s1len),
      53             :              quotearg_n_style_mem (1, locale_quoting_style, s2, s2len));
      54             :     }
      55             : 
      56           0 :   return diff;
      57             : }