Merge version-etc-2 back into version-etc: Better way to internationalize

[gnulib.git] / lib / version-etc.c

diff --git a/lib/version-etc.c b/lib/version-etc.c
index 663aa8d..e32742b 100644 (file)
--- a/lib/version-etc.c
+++ b/lib/version-etc.c
@@ -21,40 +21,124 @@
 # include <config.h>
 #endif
 
+/* Specification.  */
+#include "version-etc.h"
+
+#include <stdarg.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include "unlocked-io.h"
-#include "version-etc.h"
 
 #include "gettext.h"
 #define _(msgid) gettext (msgid)
 
 /* Default copyright goes to the FSF. */
 
-char* version_etc_copyright =
+const char* version_etc_copyright =
   /* Do *not* mark this string for translation.  */
   "Copyright (C) 2003 Free Software Foundation, Inc.";
 
 
-/* Display the --version information the standard way.
+/* Like version_etc, below, but with the NULL-terminated author list
+   provided via a variable of type va_list.  */
+void
+version_etc_va (FILE *stream,
+               const char *command_name, const char *package,
+               const char *version, va_list authors)
+{
+  unsigned int n_authors;
 
-   If COMMAND_NAME is NULL, the PACKAGE is asumed to be the name of
-   the program.  The formats are therefore:
+  /* Count the number of authors.  */
+  {
+    va_list tmp_authors;
 
-   PACKAGE VERSION
+#ifdef __va_copy
+    __va_copy (tmp_authors, authors);
+#else
+    tmp_authors = authors;
+#endif
 
-   or
+    n_authors = 0;
+    while (va_arg (tmp_authors, const char *) != NULL)
+      ++n_authors;
+  }
 
-   COMMAND_NAME (PACKAGE) VERSION.  */
-void
-version_etc (FILE *stream,
-            const char *command_name, const char *package,
-            const char *version, const char *authors)
-{
   if (command_name)
     fprintf (stream, "%s (%s) %s\n", command_name, package, version);
   else
     fprintf (stream, "%s %s\n", package, version);
-  fprintf (stream, _("Written by %s.\n"), authors);
+
+  switch (n_authors)
+    {
+    case 0:
+      /* The caller must provide at least one author name.  */
+      abort ();
+    case 1:
+      /* TRANSLATORS: %s denotes an author name.  */
+      vfprintf (stream, _("Written by %s.\n"), authors);
+      break;
+    case 2:
+      /* TRANSLATORS: Each %s denotes an author name.  */
+      vfprintf (stream, _("Written by %s and %s.\n"), authors);
+      break;
+    case 3:
+      /* TRANSLATORS: Each %s denotes an author name.  */
+      vfprintf (stream, _("Written by %s, %s, and %s.\n"), authors);
+      break;
+    case 4:
+      /* TRANSLATORS: Each %s denotes an author name.
+        You can use line breaks, estimating that each author name occupies
+        ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      vfprintf (stream, _("Written by %s, %s, %s,\nand %s.\n"), authors);
+      break;
+    case 5:
+      /* TRANSLATORS: Each %s denotes an author name.
+        You can use line breaks, estimating that each author name occupies
+        ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      vfprintf (stream, _("Written by %s, %s, %s,\n%s, and %s.\n"), authors);
+      break;
+    case 6:
+      /* TRANSLATORS: Each %s denotes an author name.
+        You can use line breaks, estimating that each author name occupies
+        ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      vfprintf (stream, _("Written by %s, %s, %s,\n%s, %s, and %s.\n"),
+               authors);
+      break;
+    case 7:
+      /* TRANSLATORS: Each %s denotes an author name.
+        You can use line breaks, estimating that each author name occupies
+        ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      vfprintf (stream, _("Written by %s, %s, %s,\n%s, %s, %s, and %s.\n"),
+               authors);
+      break;
+    case 8:
+      /* TRANSLATORS: Each %s denotes an author name.
+        You can use line breaks, estimating that each author name occupies
+        ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      vfprintf (stream, _("\
+Written by %s, %s, %s,\n%s, %s, %s, %s,\nand %s.\n"),
+               authors);
+      break;
+    case 9:
+      /* TRANSLATORS: Each %s denotes an author name.
+        You can use line breaks, estimating that each author name occupies
+        ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      vfprintf (stream, _("\
+Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, and %s.\n"),
+               authors);
+      break;
+    default:
+      /* 10 or more authors.  Use an abbreviation, since the human reader
+        will probably not want to read the entire list anyway.  */
+      /* TRANSLATORS: Each %s denotes an author name.
+        You can use line breaks, estimating that each author name occupies
+        ca. 16 screen columns and that a screen line has ca. 80 columns.  */
+      vfprintf (stream, _("\
+Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, %s, and others.\n"),
+               authors);
+      break;
+    }
+  va_end (authors);
   putc ('\n', stream);
 
   fputs (version_etc_copyright, stream);
@@ -65,3 +149,28 @@ This is free software; see the source for copying conditions.  There is NO\n\
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"),
         stream);
 }
+
+
+/* Display the --version information the standard way.
+
+   If COMMAND_NAME is NULL, the PACKAGE is asumed to be the name of
+   the program.  The formats are therefore:
+
+   PACKAGE VERSION
+
+   or
+
+   COMMAND_NAME (PACKAGE) VERSION.
+
+   The author names are passed as separate arguments, with an additional
+   NULL argument at the end.  */
+void
+version_etc (FILE *stream,
+            const char *command_name, const char *package,
+            const char *version, /* const char *author1, ...*/ ...)
+{
+  va_list authors;
+
+  va_start (authors, version);
+  version_etc_va (stream, command_name, package, version, authors);
+}