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/* GIMP - The GNU 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 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <cairo.h>
#include <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "xcf-utils.h"
gboolean
xcf_data_is_zero (const void *data,
gint size)
{
const guint8 *data8;
const guint64 *data64;
for (data8 = data; size > 0 && (guintptr) data8 % 8 != 0; data8++, size--)
{
if (*data8)
return FALSE;
}
for (data64 = (gpointer) data8; size >= 8; data64++, size -= 8)
{
if (*data64)
return FALSE;
}
for (data8 = (gpointer) data64; size > 0; data8++, size--)
{
if (*data8)
return FALSE;
}
return TRUE;
}
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