/*
 msgequal.c - Remove all msgstrs from a .po file which are identical to the
 msgid.

 (C) 2008 Canonical Ltd.
 Author: Martin Pitt <martin.pitt@ubuntu.com>

 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gettext-po.h> 

void xerror (int severity, po_message_t message, const char *filename, 
    size_t lineno, size_t column, int multiline_p, const char *message_text)
{
    fprintf (stderr, "%s:%zu: %s\n", filename, lineno, message_text);

    if (severity == PO_SEVERITY_FATAL_ERROR) {
        fputs ("FATAL error, aborting\n", stderr);
        exit (2);
    }
}

void xerror2 (int severity, po_message_t message1, const char *filename1,
    size_t lineno1, size_t column1, int multiline_p1, const char *message_text1,
    po_message_t message2, const char *filename2, size_t lineno2, size_t column2,
    int multiline_p2, const char *message_text2)
{
}


int main (int argc, char** argv)
{
    po_file_t po_in, po_out;
    struct po_xerror_handler eh;
    po_message_iterator_t msg_iter, out_iter;
    po_message_t msg;

    eh.xerror = xerror;
    eh.xerror2 = xerror2;

    if (argc != 3) {
        fputs ("Usage: msgequal <input file> <output file>\n", stderr);
        return 1;
    }

    /* slurp in file */
    po_in = po_file_read (argv[1], &eh);
    if (!po_in) {
        perror("Opening input .po file");
        return 1;
    }

    /* loop over translations and only copy those where msgid != msgstr */
    po_out = po_file_create();
    out_iter = po_message_iterator (po_out, NULL);

    msg_iter = po_message_iterator (po_in, NULL);
    while ((msg = po_next_message (msg_iter)) != NULL)
        if (strcmp (po_message_msgid (msg), po_message_msgstr (msg)))
            po_message_insert (out_iter, msg);

    /* write output file */
    if (!po_file_write (po_out, argv[2], &eh)) {
        perror ("Writing output .po file");
        return 1;
    }

    return 0;
}