/* Concatenates several translation catalogs.
   Copyright (C) 2001-2002 Free Software Foundation, Inc.
   Written by Bruno Haible <haible@clisp.cons.org>, 2001.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */


#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <getopt.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>

#include "dir-list.h"
#include "str-list.h"
#include "file-list.h"
#include "error.h"
#include "progname.h"
#include "basename.h"
#include "message.h"
#include "read-po.h"
#include "write-po.h"
#include "msgl-cat.h"
#include "exit.h"
#include "gettext.h"

#define _(str) gettext (str)


/* Force output of PO file even if empty.  */
static int force_po;

/* Target encoding.  */
static const char *to_code;

/* Long options.  */
static const struct option long_options[] =
{
  { "add-location", no_argument, &line_comment, 1 },
  { "directory", required_argument, NULL, 'D' },
  { "escape", no_argument, NULL, 'E' },
  { "files-from", required_argument, NULL, 'f' },
  { "force-po", no_argument, &force_po, 1 },
  { "help", no_argument, NULL, 'h' },
  { "indent", no_argument, NULL, 'i' },
  { "no-escape", no_argument, NULL, 'e' },
  { "no-location", no_argument, &line_comment, 0 },
  { "no-wrap", no_argument, NULL, CHAR_MAX + 2 },
  { "output-file", required_argument, NULL, 'o' },
  { "sort-by-file", no_argument, NULL, 'F' },
  { "sort-output", no_argument, NULL, 's' },
  { "strict", no_argument, NULL, 'S' },
  { "to-code", required_argument, NULL, 't' },
  { "unique", no_argument, NULL, 'u' },
  { "use-first", no_argument, NULL, CHAR_MAX + 1 },
  { "version", no_argument, NULL, 'V' },
  { "width", required_argument, NULL, 'w', },
  { "more-than", required_argument, NULL, '>', },
  { "less-than", required_argument, NULL, '<', },
  { NULL, 0, NULL, 0 }
};


/* Prototypes for local functions.  Needed to ensure compiler checking of
   function argument counts despite of K&R C function definition syntax.  */
static void usage PARAMS ((int status));


int
main (argc, argv)
     int argc;
     char **argv;
{
  int cnt;
  int optchar;
  bool do_help;
  bool do_version;
  char *output_file;
  const char *files_from;
  string_list_ty *file_list;
  msgdomain_list_ty *result;
  bool sort_by_msgid = false;
  bool sort_by_filepos = false;

  /* Set program name for messages.  */
  set_program_name (argv[0]);
  error_print_progname = maybe_print_progname;

#ifdef HAVE_SETLOCALE
  /* Set locale via LC_ALL.  */
  setlocale (LC_ALL, "");
#endif

  /* Set the text message domain.  */
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  /* Set default values for variables.  */
  do_help = false;
  do_version = false;
  output_file = NULL;
  files_from = NULL;
  more_than = 0;
  less_than = INT_MAX;
  use_first = false;

  while ((optchar = getopt_long (argc, argv, "<:>:D:eEf:Fhino:st:uVw:",
				 long_options, NULL)) != EOF)
    switch (optchar)
      {
      case '\0':		/* Long option.  */
	break;

      case '>':
	{
	  int value;
	  char *endp;
	  value = strtol (optarg, &endp, 10);
	  if (endp != optarg)
	    more_than = value;
	}
	break;

      case '<':
	{
	  int value;
	  char *endp;
	  value = strtol (optarg, &endp, 10);
	  if (endp != optarg)
	    less_than = value;
	}
	break;

      case 'D':
	dir_list_append (optarg);
	break;

      case 'e':
	message_print_style_escape (false);
	break;

      case 'E':
	message_print_style_escape (true);
	break;

      case 'f':
	files_from = optarg;
	break;

      case 'F':
	sort_by_filepos = true;
        break;

      case 'h':
	do_help = true;
	break;

      case 'i':
	message_print_style_indent ();
	break;

      case 'n':
	line_comment = 1;
	break;

      case 'o':
	output_file = optarg;
	break;

      case 's':
	sort_by_msgid = true;
	break;

      case 'S':
	message_print_style_uniforum ();
	break;

      case 't':
	to_code = optarg;
	break;

      case 'u':
        less_than = 2;
        break;

      case 'V':
	do_version = true;
	break;

      case 'w':
	{
	  int value;
	  char *endp;
	  value = strtol (optarg, &endp, 10);
	  if (endp != optarg)
	    message_page_width_set (value);
	}
	break;

      case CHAR_MAX + 1:
	use_first = true;
	break;

      case CHAR_MAX + 2: /* --no-wrap */
	message_page_width_ignore ();
	break;

      default:
	usage (EXIT_FAILURE);
	/* NOTREACHED */
      }

  /* Version information requested.  */
  if (do_version)
    {
      printf ("%s (GNU %s) %s\n", basename (program_name), PACKAGE, VERSION);
      /* xgettext: no-wrap */
      printf (_("Copyright (C) %s Free Software Foundation, Inc.\n\
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\
"),
	      "2001-2002");
      printf (_("Written by %s.\n"), "Bruno Haible");
      exit (EXIT_SUCCESS);
    }

  /* Help is requested.  */
  if (do_help)
    usage (EXIT_SUCCESS);

  /* Verify selected options.  */
  if (!line_comment && sort_by_filepos)
    error (EXIT_FAILURE, 0, _("%s and %s are mutually exclusive"),
	   "--no-location", "--sort-by-file");

  if (sort_by_msgid && sort_by_filepos)
    error (EXIT_FAILURE, 0, _("%s and %s are mutually exclusive"),
	   "--sort-output", "--sort-by-file");

  /* Check the message selection criteria for sanity.  */
  if (more_than >= less_than || less_than < 2)
    error (EXIT_FAILURE, 0,
           _("impossible selection criteria specified (%d < n < %d)"),
           more_than, less_than);

  /* Determine list of files we have to process.  */
  if (files_from != NULL)
    file_list = read_names_from_file (files_from);
  else
    file_list = string_list_alloc ();
  /* Append names from command line.  */
  for (cnt = optind; cnt < argc; ++cnt)
    string_list_append_unique (file_list, argv[cnt]);

  /* Read input files, then filter, convert and merge messages.  */
  result = catenate_msgdomain_list (file_list, to_code);

  string_list_free (file_list);

  /* Sorting the list of messages.  */
  if (sort_by_filepos)
    msgdomain_list_sort_by_filepos (result);
  else if (sort_by_msgid)
    msgdomain_list_sort_by_msgid (result);

  /* Write the PO file.  */
  msgdomain_list_print (result, output_file, force_po, false);

  exit (EXIT_SUCCESS);
}


/* Display usage information and exit.  */
static void
usage (status)
     int status;
{
  if (status != EXIT_SUCCESS)
    fprintf (stderr, _("Try `%s --help' for more information.\n"),
	     program_name);
  else
    {
      /* xgettext: no-wrap */
      printf (_("\
Usage: %s [OPTION] [INPUTFILE]...\n\
"), program_name);
      printf ("\n");
      /* xgettext: no-wrap */
      printf (_("\
Concatenates and merges the specified PO files.\n\
Find messages which are common to two or more of the specified PO files.\n\
By using the --more-than option, greater commonality may be requested\n\
before messages are printed.  Conversely, the --less-than option may be\n\
used to specify less commonality before messages are printed (i.e.\n\
--less-than=2 will only print the unique messages).  Translations,\n\
comments and extract comments will be cumulated, except that if --use-first\n\
is specified, they will be taken from the first PO file to define them.\n\
File positions from all PO files will be cumulated.\n\
"));
      printf ("\n");
      /* xgettext: no-wrap */
      printf (_("\
Mandatory arguments to long options are mandatory for short options too.\n\
"));
      printf ("\n");
      /* xgettext: no-wrap */
      printf (_("\
Input file location:\n\
  INPUTFILE ...                  input files\n\
  -f, --files-from=FILE          get list of input files from FILE\n\
  -D, --directory=DIRECTORY      add DIRECTORY to list for input files search\n\
If input file is -, standard input is read.\n\
"));
      printf ("\n");
      /* xgettext: no-wrap */
      printf (_("\
Output file location:\n\
  -o, --output-file=FILE         write output to specified file\n\
The results are written to standard output if no output file is specified\n\
or if it is -.\n\
"));
      printf ("\n");
      /* xgettext: no-wrap */
      printf (_("\
Message selection:\n\
  -<, --less-than=NUMBER         print messages with less than this many\n\
                                 definitions, defaults to infinite if not\n\
                                 set\n\
  ->, --more-than=NUMBER         print messages with more than this many\n\
                                 definitions, defaults to 0 if not set\n\
  -u, --unique                   shorthand for --less-than=2, requests\n\
                                 that only unique messages be printed\n\
"));
      printf ("\n");
      /* xgettext: no-wrap */
      printf (_("\
Output details:\n\
  -t, --to-code=NAME             encoding for output\n\
      --use-first                use first available translation for each\n\
                                 message, don't merge several translations\n\
  -e, --no-escape                do not use C escapes in output (default)\n\
  -E, --escape                   use C escapes in output, no extended chars\n\
      --force-po                 write PO file even if empty\n\
  -i, --indent                   write the .po file using indented style\n\
      --no-location              do not write '#: filename:line' lines\n\
  -n, --add-location             generate '#: filename:line' lines (default)\n\
      --strict                   write out strict Uniforum conforming .po file\n\
  -w, --width=NUMBER             set output page width\n\
      --no-wrap                  do not break long message lines, longer than\n\
                                 the output page width, into several lines\n\
  -s, --sort-output              generate sorted output\n\
  -F, --sort-by-file             sort output by file location\n\
"));
      printf ("\n");
      /* xgettext: no-wrap */
      printf (_("\
Informative output:\n\
  -h, --help                     display this help and exit\n\
  -V, --version                  output version information and exit\n\
"));
      printf ("\n");
      fputs (_("Report bugs to <bug-gnu-gettext@gnu.org>.\n"),
	     stdout);
    }

  exit (status);
}