1/*
2 * Copyright © 2012 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial
14 * portions of the Software.
15 *
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
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 */
25
26#include <stdlib.h>
27#include <stdio.h>
28#include <assert.h>
29#include "wayland-private.h"
30#include "test-runner.h"
31
32TEST(fixed_double_conversions)
33{
34 wl_fixed_t f;
35 double d;
36
37 d = 62.125;
38 f = wl_fixed_from_double(d);
39 fprintf(stderr, format: "double %lf to fixed %x\n", d, f);
40 assert(f == 0x3e20);
41
42 d = -1200.625;
43 f = wl_fixed_from_double(d);
44 fprintf(stderr, format: "double %lf to fixed %x\n", d, f);
45 assert(f == -0x4b0a0);
46
47 f = random();
48 d = wl_fixed_to_double(f);
49 fprintf(stderr, format: "fixed %x to double %lf\n", f, d);
50 assert(d == f / 256.0);
51
52 f = 0x012030;
53 d = wl_fixed_to_double(f);
54 fprintf(stderr, format: "fixed %x to double %lf\n", f, d);
55 assert(d == 288.1875);
56
57 f = 0x70000000;
58 d = wl_fixed_to_double(f);
59 fprintf(stderr, format: "fixed %x to double %lf\n", f, d);
60 assert(d == f / 256);
61
62 f = -0x012030;
63 d = wl_fixed_to_double(f);
64 fprintf(stderr, format: "fixed %x to double %lf\n", f, d);
65 assert(d == -288.1875);
66
67 f = 0x80000000;
68 d = wl_fixed_to_double(f);
69 fprintf(stderr, format: "fixed %x to double %lf\n", f, d);
70 assert(d == f / 256);
71}
72
73TEST(fixed_int_conversions)
74{
75 wl_fixed_t f;
76 int i;
77
78 i = 62;
79 f = wl_fixed_from_int(i);
80 assert(f == 62 * 256);
81
82 i = -2080;
83 f = wl_fixed_from_int(i);
84 assert(f == -2080 * 256);
85
86 f = 0x277013;
87 i = wl_fixed_to_int(f);
88 assert(i == 0x2770);
89
90 f = -0x5044;
91 i = wl_fixed_to_int(f);
92 assert(i == -0x50);
93}
94

source code of gtk/subprojects/wayland/tests/fixed-test.c