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 "intl.h"
  25
  26 #ifdef HAVE_LANGINFO_CODESET
  27 #include <langinfo.h>
  28 #endif
  29
  30 /* Opening quotation mark for diagnostics.  */
  31 const char *open_quote = "'";
  32
  33 /* Closing quotation mark for diagnostics.  */
  34 const char *close_quote = "'";
  35
  36 /* The name of the locale encoding.  */
  37 const char *locale_encoding = NULL;
  38
  39 /* Whether the locale is using UTF-8.  */
  40 bool locale_utf8 = false;
  41
  42 #ifdef ENABLE_NLS
  43
  44 /* Initialize the translation library for GCC.  This performs the
  45    appropriate sequence of calls - setlocale, bindtextdomain,
  46    textdomain.  LC_CTYPE determines the character set used by the
  47    terminal, so it has be set to output messages correctly.  */
  48
  49 void
  50 gcc_init_libintl (void)
  51 {
  52 #ifdef HAVE_LC_MESSAGES
  53   setlocale (LC_CTYPE, "");
  54   setlocale (LC_MESSAGES, "");
  55 #else
  56   setlocale (LC_ALL, "");
  57 #endif
  58
  59   (void) bindtextdomain ("gcc", LOCALEDIR);
  60   (void) textdomain ("gcc");
  61
  62   /* Opening quotation mark.  */
  63   open_quote = _("`");
  64
  65   /* Closing quotation mark.  */
  66   close_quote = _("'");
  67
  68 #if defined HAVE_LANGINFO_CODESET
  69   locale_encoding = nl_langinfo (CODESET);
  70   if (locale_encoding != NULL
  71       && (!strcasecmp (locale_encoding, "utf-8")
  72           || !strcasecmp (locale_encoding, "utf8")))
  73     locale_utf8 = true;
  74 #endif
  75
  76   if (!strcmp (open_quote, "`") && !strcmp (close_quote, "'"))
  77     {
  78       /* Untranslated quotes that it may be possible to replace with
  79          U+2018 and U+2019; but otherwise use "'" instead of "`" as
  80          opening quote.  */
  81       open_quote = "'";
  82 #if defined HAVE_LANGINFO_CODESET
  83       if (locale_utf8)
  84         {
  85           open_quote = "\xe2\x80\x98";
  86           close_quote = "\xe2\x80\x99";
  87         }
  88 #endif
  89     }
  90 }
  91
  92 #if defined HAVE_WCHAR_H && defined HAVE_WORKING_MBSTOWCS && defined HAVE_WCSWIDTH
  93 #include <wchar.h>
  94
  95 /* Returns the width in columns of MSGSTR, which came from gettext.
  96    This is for indenting subsequent output.  */
  97
  98 size_t
  99 gcc_gettext_width (const char *msgstr)
 100 {
 101   size_t nwcs = mbstowcs (0, msgstr, 0);
 102   wchar_t *wmsgstr = XALLOCAVEC (wchar_t, nwcs + 1);
 103
 104   mbstowcs (wmsgstr, msgstr, nwcs + 1);
 105   return wcswidth (wmsgstr, nwcs);
 106 }
 107
 108 #else  /* no wcswidth */
 109
 110 /* We don't have any way of knowing how wide the string is.  Guess
 111    the length of the string.  */
 112
 113 size_t
 114 gcc_gettext_width (const char *msgstr)
 115 {
 116   return strlen (msgstr);
 117 }
 118
 119 #endif
 120
 121 #endif /* ENABLE_NLS */
 122
 123 #ifndef ENABLE_NLS
 124
 125 const char *
 126 fake_ngettext (const char *singular, const char *plural, unsigned long n)
 127 {
 128   if (n == 1UL)
 129     return singular;
 130
 131   return plural;
 132 }
 133
 134 #endif
 135
 136 /* Return the indent for successive lines, using the width of
 137    the STR.  STR must have been translated already.  The string
 138    must be freed by the caller.  */
 139
 140 char *
 141 get_spaces (const char *str)
 142 {
 143    size_t len = gcc_gettext_width (str);
 144    char *spaces = XNEWVEC(char, len + 1);
 145    memset (spaces, ' ', len);
 146    spaces[len] = '\0';
 147    return spaces;
 148 }
 149
 150
 151