1 /* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
3 * Copyright 2010 Andrea Canciani
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use, copy,
9 * modify, merge, publish, distribute, sublicense, and/or sell copies
10 * of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * Author: Andrea Canciani <ranma42@gmail.com>
28 #include "cairo-test.h"
34 cairo_arc can hang in an infinite loop if given huge (so big that
35 adding/subtracting 4*M_PI to them doesn't change the value because
36 of floating point rounding).
38 The purpose of this test is to check that cairo doesn't hang or crash.
41 static cairo_test_status_t
42 draw (cairo_t *cr, int width, int height)
44 cairo_set_source_rgb (cr, 1, 1, 1);
47 /* Check if the code that guarantees start <= end hangs */
48 cairo_arc (cr, 0, 0, 1, 1024 / DBL_EPSILON * M_PI, 0);
50 /* Check if the code that handles huge angles hangs */
51 cairo_arc (cr, 0, 0, 1, 0, 1024 / DBL_EPSILON * M_PI);
53 return CAIRO_TEST_SUCCESS;
56 CAIRO_TEST (arc_infinite_loop,
57 "Test cairo_arc with huge angles",
59 NULL, /* requirements */