xcf-seek.cpp

/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * 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 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
 
#include "config.h"
 
#include <stdio.h>
#include <errno.h>
 
#include <glib-object.h>
 
#include "core/core-types.h"
 
#include "xcf-private.h"
#include "xcf-seek.h"
 
#include "gimp-intl.h"
 
bool
xcf_seek_pos (XcfInfo  *info,
          TQ_UINT32     pos,
          GError  **error)
{
    if (info->cp != pos)
    {
        info->cp = pos;
        if (fseek (info->fp, info->cp, SEEK_SET) == -1)
        {
            g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
                         _("Could not seek in XCF file: %s"),
                         g_strerror (errno));
 
            return false;
        }
    }
 
    return true;
}
 
bool
xcf_seek_end (XcfInfo  *info,
              GError  **error)
{
    if (fseek (info->fp, 0, SEEK_END) == -1)
    {
        g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
                     _("Could not seek in XCF file: %s"),
                     g_strerror (errno));
 
        return false;
    }
 
    info->cp = ftell (info->fp);
 
    if (fseek (info->fp, 0, SEEK_END) == -1)
    {
        g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
                     _("Could not seek in XCF file: %s"),
                     g_strerror (errno));
 
        return false;
    }
 
    return true;
}