lib/version-etc.c

   1 /* Utility to help print --version output in a consistent format.
   2    Copyright (C) 1999-2005 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* Written by Jim Meyering. */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 /* Specification.  */
  25 #include "version-etc.h"
  26
  27 #include <stdarg.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30
  31 #if USE_UNLOCKED_IO
  32 # include "unlocked-io.h"
  33 #endif
  34
  35 #include "gettext.h"
  36 #define _(msgid) gettext (msgid)
  37
  38 /* Default copyright goes to the FSF. */
  39
  40 const char* version_etc_copyright =
  41   /* Do *not* mark this string for translation.  */
  42   "Copyright (C) 2005 Free Software Foundation, Inc.";
  43
  44
  45 /* Like version_etc, below, but with the NULL-terminated author list
  46    provided via a variable of type va_list.  */
  47 void
  48 version_etc_va (FILE *stream,
  49                 const char *command_name, const char *package,
  50                 const char *version, va_list authors)
  51 {
  52   size_t n_authors;
  53
  54   /* Count the number of authors.  */
  55   {
  56     va_list tmp_authors;
  57
  58 #ifdef __va_copy
  59     __va_copy (tmp_authors, authors);
  60 #else
  61     tmp_authors = authors;
  62 #endif
  63
  64     n_authors = 0;
  65     while (va_arg (tmp_authors, const char *) != NULL)
  66       ++n_authors;
  67   }
  68
  69   if (command_name)
  70     fprintf (stream, "%s (%s) %s\n", command_name, package, version);
  71   else
  72     fprintf (stream, "%s %s\n", package, version);
  73
  74   switch (n_authors)
  75     {
  76     case 0:
  77       /* The caller must provide at least one author name.  */
  78       abort ();
  79     case 1:
  80       /* TRANSLATORS: %s denotes an author name.  */
  81       vfprintf (stream, _("Written by %s.\n"), authors);
  82       break;
  83     case 2:
  84       /* TRANSLATORS: Each %s denotes an author name.  */
  85       vfprintf (stream, _("Written by %s and %s.\n"), authors);
  86       break;
  87     case 3:
  88       /* TRANSLATORS: Each %s denotes an author name.  */
  89       vfprintf (stream, _("Written by %s, %s, and %s.\n"), authors);
  90       break;
  91     case 4:
  92       /* TRANSLATORS: Each %s denotes an author name.
  93          You can use line breaks, estimating that each author name occupies
  94          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
  95       vfprintf (stream, _("Written by %s, %s, %s,\nand %s.\n"), authors);
  96       break;
  97     case 5:
  98       /* TRANSLATORS: Each %s denotes an author name.
  99          You can use line breaks, estimating that each author name occupies
 100          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 101       vfprintf (stream, _("Written by %s, %s, %s,\n%s, and %s.\n"), authors);
 102       break;
 103     case 6:
 104       /* TRANSLATORS: Each %s denotes an author name.
 105          You can use line breaks, estimating that each author name occupies
 106          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 107       vfprintf (stream, _("Written by %s, %s, %s,\n%s, %s, and %s.\n"),
 108                 authors);
 109       break;
 110     case 7:
 111       /* TRANSLATORS: Each %s denotes an author name.
 112          You can use line breaks, estimating that each author name occupies
 113          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 114       vfprintf (stream, _("Written by %s, %s, %s,\n%s, %s, %s, and %s.\n"),
 115                 authors);
 116       break;
 117     case 8:
 118       /* TRANSLATORS: Each %s denotes an author name.
 119          You can use line breaks, estimating that each author name occupies
 120          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 121       vfprintf (stream, _("\
 122 Written by %s, %s, %s,\n%s, %s, %s, %s,\nand %s.\n"),
 123                 authors);
 124       break;
 125     case 9:
 126       /* TRANSLATORS: Each %s denotes an author name.
 127          You can use line breaks, estimating that each author name occupies
 128          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 129       vfprintf (stream, _("\
 130 Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, and %s.\n"),
 131                 authors);
 132       break;
 133     default:
 134       /* 10 or more authors.  Use an abbreviation, since the human reader
 135          will probably not want to read the entire list anyway.  */
 136       /* TRANSLATORS: Each %s denotes an author name.
 137          You can use line breaks, estimating that each author name occupies
 138          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 139       vfprintf (stream, _("\
 140 Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, %s, and others.\n"),
 141                 authors);
 142       break;
 143     }
 144   va_end (authors);
 145   putc ('\n', stream);
 146
 147   fputs (version_etc_copyright, stream);
 148   putc ('\n', stream);
 149
 150   fputs (_("\
 151 This is free software; see the source for copying conditions.  There is NO\n\
 152 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"),
 153          stream);
 154 }
 155
 156
 157 /* Display the --version information the standard way.
 158
 159    If COMMAND_NAME is NULL, the PACKAGE is asumed to be the name of
 160    the program.  The formats are therefore:
 161
 162    PACKAGE VERSION
 163
 164    or
 165
 166    COMMAND_NAME (PACKAGE) VERSION.
 167
 168    The author names are passed as separate arguments, with an additional
 169    NULL argument at the end.  */
 170 void
 171 version_etc (FILE *stream,
 172              const char *command_name, const char *package,
 173              const char *version, /* const char *author1, ...*/ ...)
 174 {
 175   va_list authors;
 176
 177   va_start (authors, version);
 178   version_etc_va (stream, command_name, package, version, authors);
 179 }