]>
jfr.im git - solanum.git/blob - tests/tap/float.c
2 * Utility routines for writing floating point tests.
4 * Currently provides only one function, which checks whether a double is
5 * equal to an expected value within a given epsilon. This is broken into a
6 * separate source file from the rest of the basic C TAP library because it
7 * may require linking with -lm on some platforms, and the package may not
8 * otherwise care about floating point.
10 * This file is part of C TAP Harness. The current version plus supporting
11 * documentation is at <https://www.eyrie.org/~eagle/software/c-tap-harness/>.
13 * Copyright 2008, 2010, 2012, 2013, 2014, 2015, 2016
14 * Russ Allbery <eagle@eyrie.org>
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
23 * The above copyright notice and this permission notice shall be included in
24 * all copies or substantial portions of the Software.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
29 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
30 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
31 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
32 * DEALINGS IN THE SOFTWARE.
35 /* Required for isnan() and isinf(). */
36 #if defined(__STRICT_ANSI__) || defined(PEDANTIC)
37 # ifndef _XOPEN_SOURCE
38 # define _XOPEN_SOURCE 600
46 #include <tests/tap/basic.h>
47 #include <tests/tap/float.h>
50 * Takes an expected double and a seen double and assumes the test passes if
51 * those two numbers are within delta of each other.
54 is_double(double wanted
, double seen
, double epsilon
, const char *format
, ...)
59 va_start(args
, format
);
61 if ((isnan(wanted
) && isnan(seen
))
62 || (isinf(wanted
) && isinf(wanted
) == isinf(seen
))
63 || fabs(wanted
- seen
) <= epsilon
) {
68 diag("wanted: %g", wanted
);
69 diag(" seen: %g", seen
);