gl/version-etc.c

   1 /* Utility to help print --version output in a consistent format.
   2    Copyright (C) 1999-2007 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 /* Written by Jim Meyering. */
  19
  20 #include <config.h>
  21
  22 /* Specification.  */
  23 #include "version-etc.h"
  24
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28
  29 #if USE_UNLOCKED_IO
  30 # include "unlocked-io.h"
  31 #endif
  32
  33 #include "gettext.h"
  34 #define _(msgid) gettext (msgid)
  35
  36 enum { COPYRIGHT_YEAR = 2007 };
  37
  38 /* Like version_etc, below, but with the NULL-terminated author list
  39    provided via a variable of type va_list.  */
  40 void
  41 version_etc_va (FILE *stream,
  42                 const char *command_name, const char *package,
  43                 const char *version, va_list authors)
  44 {
  45   size_t n_authors;
  46
  47   /* Count the number of authors.  */
  48   {
  49     va_list tmp_authors;
  50
  51     va_copy (tmp_authors, authors);
  52
  53     n_authors = 0;
  54     while (va_arg (tmp_authors, const char *) != NULL)
  55       ++n_authors;
  56   }
  57
  58   if (command_name)
  59     fprintf (stream, "%s (%s) %s\n", command_name, package, version);
  60   else
  61     fprintf (stream, "%s %s\n", package, version);
  62
  63   /* TRANSLATORS: Translate "(C)" to the copyright symbol
  64      (C-in-a-circle), if this symbol is available in the user's
  65      locale.  Otherwise, do not translate "(C)"; leave it as-is.  */
  66   fprintf (stream, version_etc_copyright, _("(C)"), COPYRIGHT_YEAR);
  67
  68   fputs (_("\
  69 \n\
  70 License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>\n\
  71 This is free software: you are free to change and redistribute it.\n\
  72 There is NO WARRANTY, to the extent permitted by law.\n\
  73 \n\
  74 "),
  75          stream);
  76
  77   switch (n_authors)
  78     {
  79     case 0:
  80       /* The caller must provide at least one author name.  */
  81       abort ();
  82     case 1:
  83       /* TRANSLATORS: %s denotes an author name.  */
  84       vfprintf (stream, _("Written by %s.\n"), authors);
  85       break;
  86     case 2:
  87       /* TRANSLATORS: Each %s denotes an author name.  */
  88       vfprintf (stream, _("Written by %s and %s.\n"), authors);
  89       break;
  90     case 3:
  91       /* TRANSLATORS: Each %s denotes an author name.  */
  92       vfprintf (stream, _("Written by %s, %s, and %s.\n"), authors);
  93       break;
  94     case 4:
  95       /* TRANSLATORS: Each %s denotes an author name.
  96          You can use line breaks, estimating that each author name occupies
  97          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
  98       vfprintf (stream, _("Written by %s, %s, %s,\nand %s.\n"), authors);
  99       break;
 100     case 5:
 101       /* TRANSLATORS: Each %s denotes an author name.
 102          You can use line breaks, estimating that each author name occupies
 103          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 104       vfprintf (stream, _("Written by %s, %s, %s,\n%s, and %s.\n"), authors);
 105       break;
 106     case 6:
 107       /* TRANSLATORS: Each %s denotes an author name.
 108          You can use line breaks, estimating that each author name occupies
 109          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 110       vfprintf (stream, _("Written by %s, %s, %s,\n%s, %s, and %s.\n"),
 111                 authors);
 112       break;
 113     case 7:
 114       /* TRANSLATORS: Each %s denotes an author name.
 115          You can use line breaks, estimating that each author name occupies
 116          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 117       vfprintf (stream, _("Written by %s, %s, %s,\n%s, %s, %s, and %s.\n"),
 118                 authors);
 119       break;
 120     case 8:
 121       /* TRANSLATORS: Each %s denotes an author name.
 122          You can use line breaks, estimating that each author name occupies
 123          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 124       vfprintf (stream, _("\
 125 Written by %s, %s, %s,\n%s, %s, %s, %s,\nand %s.\n"),
 126                 authors);
 127       break;
 128     case 9:
 129       /* TRANSLATORS: Each %s denotes an author name.
 130          You can use line breaks, estimating that each author name occupies
 131          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 132       vfprintf (stream, _("\
 133 Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, and %s.\n"),
 134                 authors);
 135       break;
 136     default:
 137       /* 10 or more authors.  Use an abbreviation, since the human reader
 138          will probably not want to read the entire list anyway.  */
 139       /* TRANSLATORS: Each %s denotes an author name.
 140          You can use line breaks, estimating that each author name occupies
 141          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 142       vfprintf (stream, _("\
 143 Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, %s, and others.\n"),
 144                 authors);
 145       break;
 146     }
 147   va_end (authors);
 148 }
 149
 150
 151 /* Display the --version information the standard way.
 152
 153    If COMMAND_NAME is NULL, the PACKAGE is asumed to be the name of
 154    the program.  The formats are therefore:
 155
 156    PACKAGE VERSION
 157
 158    or
 159
 160    COMMAND_NAME (PACKAGE) VERSION.
 161
 162    The author names are passed as separate arguments, with an additional
 163    NULL argument at the end.  */
 164 void
 165 version_etc (FILE *stream,
 166              const char *command_name, const char *package,
 167              const char *version, /* const char *author1, ...*/ ...)
 168 {
 169   va_list authors;
 170
 171   va_start (authors, version);
 172   version_etc_va (stream, command_name, package, version, authors);
 173 }