Mercurial > hg > octave-nkf > gnulib-hg
annotate lib/logf.c @ 17907:0a1c2535cad9
euidaccess: Fix Android build
* modules/euidaccess (Depends-on): Add fcntl-h to ensure that
AT_EACCESS gets declared.
| author | Kevin Cernekee <cernekee@google.com> |
|---|---|
| date | Wed, 11 Feb 2015 15:22:54 -0800 |
| parents | ab58d4870664 |
| children |
| rev | line source |
|---|---|
| 15863 | 1 /* Natural logarithmic function. |
| 17848 | 2 Copyright (C) 2011-2015 Free Software Foundation, Inc. |
| 15863 | 3 |
| 4 This program is free software: you can redistribute it and/or modify | |
| 5 it under the terms of the GNU General Public License as published by | |
| 6 the Free Software Foundation; either version 3 of the License, or | |
| 7 (at your option) any later version. | |
| 8 | |
| 9 This program is distributed in the hope that it will be useful, | |
| 10 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 GNU General Public License for more details. | |
| 13 | |
| 14 You should have received a copy of the GNU General Public License | |
| 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 16 | |
| 17 #include <config.h> | |
| 18 | |
| 19 /* Specification. */ | |
| 20 #include <math.h> | |
| 21 | |
| 22 float | |
| 23 logf (float x) | |
|
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2450f24b2cbc
logf: Work around OSF/1 5.1 bug.
Bruno Haible <bruno@clisp.org>
parents:
16201
diff
changeset
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24 #undef logf |
| 15863 | 25 { |
|
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logf: Work around OSF/1 5.1 bug.
Bruno Haible <bruno@clisp.org>
parents:
16201
diff
changeset
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26 #if HAVE_LOGF |
|
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parents:
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changeset
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27 if (x <= 0.0f) |
|
d7a6433b4967
logf-ieee: Work around test failure on NetBSD 5.1.
Bruno Haible <bruno@clisp.org>
parents:
16632
diff
changeset
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28 { |
|
d7a6433b4967
logf-ieee: Work around test failure on NetBSD 5.1.
Bruno Haible <bruno@clisp.org>
parents:
16632
diff
changeset
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29 /* Work around the OSF/1 5.1 bug. */ |
|
d7a6433b4967
logf-ieee: Work around test failure on NetBSD 5.1.
Bruno Haible <bruno@clisp.org>
parents:
16632
diff
changeset
|
30 if (x == 0.0f) |
|
d7a6433b4967
logf-ieee: Work around test failure on NetBSD 5.1.
Bruno Haible <bruno@clisp.org>
parents:
16632
diff
changeset
|
31 /* Return -Infinity. */ |
|
d7a6433b4967
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Bruno Haible <bruno@clisp.org>
parents:
16632
diff
changeset
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32 return -1.0f / 0.0f; |
|
d7a6433b4967
logf-ieee: Work around test failure on NetBSD 5.1.
Bruno Haible <bruno@clisp.org>
parents:
16632
diff
changeset
|
33 /* Work around the NetBSD 5.1 bug. */ |
|
d7a6433b4967
logf-ieee: Work around test failure on NetBSD 5.1.
Bruno Haible <bruno@clisp.org>
parents:
16632
diff
changeset
|
34 else /* x < 0.0 */ |
|
d7a6433b4967
logf-ieee: Work around test failure on NetBSD 5.1.
Bruno Haible <bruno@clisp.org>
parents:
16632
diff
changeset
|
35 /* Return NaN. */ |
|
d7a6433b4967
logf-ieee: Work around test failure on NetBSD 5.1.
Bruno Haible <bruno@clisp.org>
parents:
16632
diff
changeset
|
36 return 0.0f / 0.0f; |
|
d7a6433b4967
logf-ieee: Work around test failure on NetBSD 5.1.
Bruno Haible <bruno@clisp.org>
parents:
16632
diff
changeset
|
37 } |
|
16632
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logf: Work around OSF/1 5.1 bug.
Bruno Haible <bruno@clisp.org>
parents:
16201
diff
changeset
|
38 return logf (x); |
|
2450f24b2cbc
logf: Work around OSF/1 5.1 bug.
Bruno Haible <bruno@clisp.org>
parents:
16201
diff
changeset
|
39 #else |
| 15863 | 40 return (float) log ((double) x); |
|
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2450f24b2cbc
logf: Work around OSF/1 5.1 bug.
Bruno Haible <bruno@clisp.org>
parents:
16201
diff
changeset
|
41 #endif |
| 15863 | 42 } |