Mercurial > gnulib
view tests/test-logb.h @ 40198:5a34193cbc07
long-options: add parse_gnu_standard_options_only
Discussed in https://bugs.gnu.org/33468 .
* lib/long-options.c (parse_long_options): Use EXIT_SUCCESS instead
of 0.
(parse_gnu_standard_options_only): Add function to
process the GNU default options --help and --version and fail for any other
unknown long or short option. See
https://gnu.org/prep/standards/html_node/Command_002dLine-Interfaces.html .
* lib/long-options.h (parse_gnu_standard_options_only): Declare it.
* modules/long-options (depends-on): Add stdbool, exitfail.
* top/maint.mk (sc_prohibit_long_options_without_use): Update
syntax-check rule, add new function name.
author | Bernhard Voelker <mail@bernhard-voelker.de> |
---|---|
date | Thu, 29 Nov 2018 09:06:26 +0100 |
parents | b06060465f09 |
children |
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line source
/* Test of logb*() function family. Copyright (C) 2012-2019 Free Software Foundation, Inc. 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/>. */ static DOUBLE my_ldexp (DOUBLE x, int d) { for (; d > 0; d--) x *= L_(2.0); for (; d < 0; d++) x *= L_(0.5); return x; } static void test_function (void) { int i; VOLATILE DOUBLE x; DOUBLE y; /* Some particular values. */ x = L_(0.6); y = LOGB (x); ASSERT (y == - L_(1.0)); x = L_(1.2); y = LOGB (x); ASSERT (y == L_(0.0)); x = L_(2.1); y = LOGB (x); ASSERT (y == L_(1.0)); x = L_(3.9); y = LOGB (x); ASSERT (y == L_(1.0)); x = L_(4.0); y = LOGB (x); ASSERT (y == (FLT_RADIX == 2 ? L_(2.0) : L_(1.0))); x = L_(0.25); y = LOGB (x); ASSERT (y == (FLT_RADIX == 2 ? - L_(2.0) : - L_(1.0))); /* Zero. */ ASSERT (LOGB (L_(0.0)) == - HUGEVAL); ASSERT (LOGB (MINUS_ZERO) == - HUGEVAL); /* From here on, this test assumes FLT_RADIX == 2. */ for (i = 1, x = L_(1.0); i <= MAX_EXP; i++, x *= L_(2.0)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (i = 1, x = L_(1.0); i >= MIN_NORMAL_EXP; i--, x *= L_(0.5)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (; i >= MIN_EXP - 100 && x > L_(0.0); i--, x *= L_(0.5)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (i = 1, x = - L_(1.0); i <= MAX_EXP; i++, x *= L_(2.0)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (i = 1, x = - L_(1.0); i >= MIN_NORMAL_EXP; i--, x *= L_(0.5)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (; i >= MIN_EXP - 100 && x < L_(0.0); i--, x *= L_(0.5)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (i = 1, x = L_(1.01); i <= MAX_EXP; i++, x *= L_(2.0)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (i = 1, x = L_(1.01); i >= MIN_NORMAL_EXP; i--, x *= L_(0.5)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (; i >= MIN_EXP - 100 && x > L_(0.0); i--, x *= L_(0.5)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (i = 1, x = L_(1.73205); i <= MAX_EXP; i++, x *= L_(2.0)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (i = 1, x = L_(1.73205); i >= MIN_NORMAL_EXP; i--, x *= L_(0.5)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1)); } for (; i >= MIN_EXP - 100 && x > L_(0.0); i--, x *= L_(0.5)) { y = LOGB (x); ASSERT (y == (DOUBLE)(i - 1) || y == (DOUBLE)i); } /* Randomized tests. */ for (i = 0; i < SIZEOF (RANDOM); i++) { x = L_(20.0) * RANDOM[i] - L_(10.0); /* -10.0 <= x <= 10.0 */ if (x != L_(0.0)) { DOUBLE abs_x = (x < L_(0.0) ? - x : x); y = LOGB (x); ASSERT (y == (DOUBLE) (int) y); ASSERT (abs_x >= my_ldexp (L_(1.0), (int) y)); ASSERT (abs_x < my_ldexp (L_(1.0), (int) y + 1)); } } } volatile DOUBLE x; DOUBLE y;