gcc/intl.c

   1 /* Message translation utilities.
   2    Copyright (C) 2001, 2003, 2004, 2005, 2007, 2008, 2009, 2010
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tm.h"
  25 #include "intl.h"
  26
  27 #ifdef HAVE_LANGINFO_CODESET
  28 #include <langinfo.h>
  29 #endif
  30
  31 /* Opening quotation mark for diagnostics.  */
  32 const char *open_quote = "'";
  33
  34 /* Closing quotation mark for diagnostics.  */
  35 const char *close_quote = "'";
  36
  37 /* The name of the locale encoding.  */
  38 const char *locale_encoding = NULL;
  39
  40 /* Whether the locale is using UTF-8.  */
  41 bool locale_utf8 = false;
  42
  43 #ifdef ENABLE_NLS
  44
  45 /* Initialize the translation library for GCC.  This performs the
  46    appropriate sequence of calls - setlocale, bindtextdomain,
  47    textdomain.  LC_CTYPE determines the character set used by the
  48    terminal, so it has be set to output messages correctly.  */
  49
  50 void
  51 gcc_init_libintl (void)
  52 {
  53 #ifdef HAVE_LC_MESSAGES
  54   setlocale (LC_CTYPE, "");
  55   setlocale (LC_MESSAGES, "");
  56 #else
  57   setlocale (LC_ALL, "");
  58 #endif
  59
  60   (void) bindtextdomain ("gcc", LOCALEDIR);
  61   (void) textdomain ("gcc");
  62
  63   /* Opening quotation mark.  */
  64   open_quote = _("`");
  65
  66   /* Closing quotation mark.  */
  67   close_quote = _("'");
  68
  69 #if defined HAVE_LANGINFO_CODESET
  70   locale_encoding = nl_langinfo (CODESET);
  71   if (locale_encoding != NULL
  72       && (!strcasecmp (locale_encoding, "utf-8")
  73           || !strcasecmp (locale_encoding, "utf8")))
  74     locale_utf8 = true;
  75 #endif
  76
  77   if (!strcmp (open_quote, "`") && !strcmp (close_quote, "'"))
  78     {
  79       /* Untranslated quotes that it may be possible to replace with
  80          U+2018 and U+2019; but otherwise use "'" instead of "`" as
  81          opening quote.  */
  82       open_quote = "'";
  83 #if defined HAVE_LANGINFO_CODESET
  84       if (locale_utf8)
  85         {
  86           open_quote = "\xe2\x80\x98";
  87           close_quote = "\xe2\x80\x99";
  88         }
  89 #endif
  90     }
  91 }
  92
  93 #if defined HAVE_WCHAR_H && defined HAVE_WORKING_MBSTOWCS && defined HAVE_WCSWIDTH
  94 #include <wchar.h>
  95
  96 /* Returns the width in columns of MSGSTR, which came from gettext.
  97    This is for indenting subsequent output.  */
  98
  99 size_t
 100 gcc_gettext_width (const char *msgstr)
 101 {
 102   size_t nwcs = mbstowcs (0, msgstr, 0);
 103   wchar_t *wmsgstr = XALLOCAVEC (wchar_t, nwcs + 1);
 104
 105   mbstowcs (wmsgstr, msgstr, nwcs + 1);
 106   return wcswidth (wmsgstr, nwcs);
 107 }
 108
 109 #else  /* no wcswidth */
 110
 111 /* We don't have any way of knowing how wide the string is.  Guess
 112    the length of the string.  */
 113
 114 size_t
 115 gcc_gettext_width (const char *msgstr)
 116 {
 117   return strlen (msgstr);
 118 }
 119
 120 #endif
 121
 122 #endif /* ENABLE_NLS */
 123
 124 #ifndef ENABLE_NLS
 125
 126 const char *
 127 fake_ngettext (const char *singular, const char *plural, unsigned long n)
 128 {
 129   if (n == 1UL)
 130     return singular;
 131
 132   return plural;
 133 }
 134
 135 #endif
 136
 137 /* Return the indent for successive lines, using the width of
 138    the STR.  STR must have been translated already.  The string
 139    must be freed by the caller.  */
 140
 141 char *
 142 get_spaces (const char *str)
 143 {
 144    size_t len = gcc_gettext_width (str);
 145    char *spaces = XNEWVEC(char, len + 1);
 146    memset (spaces, ' ', len);
 147    spaces[len] = '\0';
 148    return spaces;
 149 }
 150
 151
 152