/* 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 . */ #include "config.h" #include #include #include #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; }