gcc/intl.c

   1 /* Message translation utilities.
   2    Copyright (C) 2001-2020 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "intl.h"
  24
  25 #ifdef HAVE_LANGINFO_CODESET
  26 #include <langinfo.h>
  27 #endif
  28
  29 /* Opening quotation mark for diagnostics.  */
  30 const char *open_quote = "'";
  31
  32 /* Closing quotation mark for diagnostics.  */
  33 const char *close_quote = "'";
  34
  35 /* The name of the locale encoding.  */
  36 const char *locale_encoding = NULL;
  37
  38 /* Whether the locale is using UTF-8.  */
  39 bool locale_utf8 = false;
  40
  41 #ifdef ENABLE_NLS
  42
  43 /* Initialize the translation library for GCC.  This performs the
  44    appropriate sequence of calls - setlocale, bindtextdomain,
  45    textdomain.  LC_CTYPE determines the character set used by the
  46    terminal, so it has be set to output messages correctly.  */
  47
  48 void
  49 gcc_init_libintl (void)
  50 {
  51 #ifdef HAVE_LC_MESSAGES
  52   setlocale (LC_CTYPE, "");
  53   setlocale (LC_MESSAGES, "");
  54 #else
  55   setlocale (LC_ALL, "");
  56 #endif
  57
  58   (void) bindtextdomain ("gcc", LOCALEDIR);
  59   (void) textdomain ("gcc");
  60
  61   /* Opening quotation mark.  */
  62   open_quote = _("`");
  63
  64   /* Closing quotation mark.  */
  65   close_quote = _("'");
  66
  67 #if defined HAVE_LANGINFO_CODESET
  68   locale_encoding = nl_langinfo (CODESET);
  69   if (locale_encoding != NULL
  70       && (!strcasecmp (locale_encoding, "utf-8")
  71           || !strcasecmp (locale_encoding, "utf8")))
  72     locale_utf8 = true;
  73 #endif
  74
  75   if (!strcmp (open_quote, "`") && !strcmp (close_quote, "'"))
  76     {
  77       /* Untranslated quotes that it may be possible to replace with
  78          U+2018 and U+2019; but otherwise use "'" instead of "`" as
  79          opening quote.  */
  80       open_quote = "'";
  81 #if defined HAVE_LANGINFO_CODESET
  82       if (locale_utf8)
  83         {
  84           open_quote = "\xe2\x80\x98";
  85           close_quote = "\xe2\x80\x99";
  86         }
  87 #endif
  88     }
  89 }
  90
  91 #if defined HAVE_WCHAR_H && defined HAVE_WORKING_MBSTOWCS && defined HAVE_WCSWIDTH
  92 #include <wchar.h>
  93
  94 /* Returns the width in columns of MSGSTR, which came from gettext.
  95    This is for indenting subsequent output.  */
  96
  97 size_t
  98 gcc_gettext_width (const char *msgstr)
  99 {
 100   size_t nwcs = mbstowcs (0, msgstr, 0);
 101   wchar_t *wmsgstr = XALLOCAVEC (wchar_t, nwcs + 1);
 102
 103   mbstowcs (wmsgstr, msgstr, nwcs + 1);
 104   return wcswidth (wmsgstr, nwcs);
 105 }
 106
 107 #else  /* no wcswidth */
 108
 109 /* We don't have any way of knowing how wide the string is.  Guess
 110    the length of the string.  */
 111
 112 size_t
 113 gcc_gettext_width (const char *msgstr)
 114 {
 115   return strlen (msgstr);
 116 }
 117
 118 #endif
 119
 120 #endif /* ENABLE_NLS */
 121
 122 #ifndef ENABLE_NLS
 123
 124 const char *
 125 fake_ngettext (const char *singular, const char *plural, unsigned long n)
 126 {
 127   if (n == 1UL)
 128     return singular;
 129
 130   return plural;
 131 }
 132
 133 #endif
 134
 135 /* Return the indent for successive lines, using the width of
 136    the STR.  STR must have been translated already.  The string
 137    must be freed by the caller.  */
 138
 139 char *
 140 get_spaces (const char *str)
 141 {
 142    size_t len = gcc_gettext_width (str);
 143    char *spaces = XNEWVEC (char, len + 1);
 144    memset (spaces, ' ', len);
 145    spaces[len] = '\0';
 146    return spaces;
 147 }
 148
 149
 150