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f24bb8dc19
There are a couple of places in the code which use `isnan()` and have
platform-specific workarounds for it. Unify those, and extend the
workaround to work for msys2-mingw32.
It seems that msys2-mingw32 can’t automatically use `isnan()` in a wider
mode than `float`:
```
In file included from ../glib/gdatetime.c:60:
../glib/gdatetime.c: In function 'g_date_time_new':
../glib/gdatetime.c:1648:14: error: conversion from 'gdouble' {aka 'double'} to 'float' may change value [-Werror=float-conversion]
1648 | isnan (seconds) ||
| ^~~~~~~
cc1.exe: all warnings being treated as errors
```
See: https://gitlab.gnome.org/pwithnall/glib/-/jobs/4022715
Using it in float mode on all platforms should not change behaviour, as
a conversion from `(double) NAN` to `float` should still give `NAN`.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3405
85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/*
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* Copyright © 2018 Endless Mobile, Inc.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Philip Withnall <withnall@endlessm.com>
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*/
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#ifndef __G_UTILS_PRIVATE_H__
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#define __G_UTILS_PRIVATE_H__
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#include "glibconfig.h"
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#include "gtypes.h"
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#include "gtestutils.h"
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#include <math.h>
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#include <time.h>
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G_BEGIN_DECLS
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void g_set_user_dirs (const gchar *first_dir_type,
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...) G_GNUC_NULL_TERMINATED;
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/* Returns the smallest power of 2 greater than or equal to n,
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* or 0 if such power does not fit in a gsize
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*/
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static inline gsize
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g_nearest_pow (gsize num)
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{
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gsize n = num - 1;
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g_assert (num > 0 && num <= G_MAXSIZE / 2);
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n |= n >> 1;
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n |= n >> 2;
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n |= n >> 4;
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n |= n >> 8;
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n |= n >> 16;
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#if GLIB_SIZEOF_SIZE_T == 8
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n |= n >> 32;
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#endif
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return n + 1;
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}
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void _g_unset_cached_tmp_dir (void);
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gboolean _g_localtime (time_t timet, struct tm *tm);
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gboolean g_set_prgname_once (const gchar *prgname);
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/* Although isnan() is defined as a type-independent macro in C99, mingw32
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* doesn’t seem to support that (it defines `isnan (float d)` only). Older
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* MSVC toolchains don’t support C99 either. So we provide an internal
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* abstraction macro.
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*
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* This should not be made public; toolchains will soon enough catch up with
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* C99, so third party code should just use isnan(). */
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static inline int
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g_isnan (double d)
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{
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#if (defined (_MSC_VER) && (_MSC_VER < 1800)) || defined(__MINGW32__)
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return _isnan (d);
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#else
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return isnan (d);
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#endif
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}
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G_END_DECLS
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#endif /* __G_UTILS_PRIVATE_H__ */
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