contrib/diffutils-2.8/lib/version-etc.c

   1 /* Utility to help print --version output in a consistent format.
   2    Copyright (C) 1999-2004 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 #include "unlocked-io.h"
  31
  32 #include "gettext.h"
  33 #define _(msgid) gettext (msgid)
  34
  35 /* Default copyright goes to the FSF. */
  36
  37 const char* version_etc_copyright =
  38   /* Do *not* mark this string for translation.  */
  39   "Copyright (C) 2004 Free Software Foundation, Inc.";
  40
  41
  42 /* Like version_etc, below, but with the NULL-terminated author list
  43    provided via a variable of type va_list.  */
  44 void
  45 version_etc_va (FILE *stream,
  46                 const char *command_name, const char *package,
  47                 const char *version, va_list authors)
  48 {
  49   unsigned int n_authors;
  50
  51   /* Count the number of authors.  */
  52   {
  53     va_list tmp_authors;
  54
  55 #ifdef __va_copy
  56     __va_copy (tmp_authors, authors);
  57 #else
  58     tmp_authors = authors;
  59 #endif
  60
  61     n_authors = 0;
  62     while (va_arg (tmp_authors, const char *) != NULL)
  63       ++n_authors;
  64   }
  65
  66   if (command_name)
  67     fprintf (stream, "%s (%s) %s\n", command_name, package, version);
  68   else
  69     fprintf (stream, "%s %s\n", package, version);
  70
  71   switch (n_authors)
  72     {
  73     case 0:
  74       /* The caller must provide at least one author name.  */
  75       abort ();
  76     case 1:
  77       /* TRANSLATORS: %s denotes an author name.  */
  78       vfprintf (stream, _("Written by %s.\n"), authors);
  79       break;
  80     case 2:
  81       /* TRANSLATORS: Each %s denotes an author name.  */
  82       vfprintf (stream, _("Written by %s and %s.\n"), authors);
  83       break;
  84     case 3:
  85       /* TRANSLATORS: Each %s denotes an author name.  */
  86       vfprintf (stream, _("Written by %s, %s, and %s.\n"), authors);
  87       break;
  88     case 4:
  89       /* TRANSLATORS: Each %s denotes an author name.
  90          You can use line breaks, estimating that each author name occupies
  91          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
  92       vfprintf (stream, _("Written by %s, %s, %s,\nand %s.\n"), authors);
  93       break;
  94     case 5:
  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,\n%s, and %s.\n"), authors);
  99       break;
 100     case 6:
 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, %s, and %s.\n"),
 105                 authors);
 106       break;
 107     case 7:
 108       /* TRANSLATORS: Each %s denotes an author name.
 109          You can use line breaks, estimating that each author name occupies
 110          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 111       vfprintf (stream, _("Written by %s, %s, %s,\n%s, %s, %s, and %s.\n"),
 112                 authors);
 113       break;
 114     case 8:
 115       /* TRANSLATORS: Each %s denotes an author name.
 116          You can use line breaks, estimating that each author name occupies
 117          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 118       vfprintf (stream, _("\
 119 Written by %s, %s, %s,\n%s, %s, %s, %s,\nand %s.\n"),
 120                 authors);
 121       break;
 122     case 9:
 123       /* TRANSLATORS: Each %s denotes an author name.
 124          You can use line breaks, estimating that each author name occupies
 125          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 126       vfprintf (stream, _("\
 127 Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, and %s.\n"),
 128                 authors);
 129       break;
 130     default:
 131       /* 10 or more authors.  Use an abbreviation, since the human reader
 132          will probably not want to read the entire list anyway.  */
 133       /* TRANSLATORS: Each %s denotes an author name.
 134          You can use line breaks, estimating that each author name occupies
 135          ca. 16 screen columns and that a screen line has ca. 80 columns.  */
 136       vfprintf (stream, _("\
 137 Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, %s, and others.\n"),
 138                 authors);
 139       break;
 140     }
 141   va_end (authors);
 142   putc ('\n', stream);
 143
 144   fputs (version_etc_copyright, stream);
 145   putc ('\n', stream);
 146
 147   fputs (_("\
 148 This is free software; see the source for copying conditions.  There is NO\n\
 149 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"),
 150          stream);
 151 }
 152
 153
 154 /* Display the --version information the standard way.
 155
 156    If COMMAND_NAME is NULL, the PACKAGE is asumed to be the name of
 157    the program.  The formats are therefore:
 158
 159    PACKAGE VERSION
 160
 161    or
 162
 163    COMMAND_NAME (PACKAGE) VERSION.
 164
 165    The author names are passed as separate arguments, with an additional
 166    NULL argument at the end.  */
 167 void
 168 version_etc (FILE *stream,
 169              const char *command_name, const char *package,
 170              const char *version, /* const char *author1, ...*/ ...)
 171 {
 172   va_list authors;
 173
 174   va_start (authors, version);
 175   version_etc_va (stream, command_name, package, version, authors);
 176 }