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e854b8f9f4
The values of {FLT,DBL}_{MAX,MIN} macros on some systems (older musl
libc, some BSD flavours) are not exactly representable, i.e.
(double)DBL_MAX == DBL_MAX is false
This violates (at least some interpretations of) the C99 standard and
breaks code (e.g. in vf_fps) like
double f = DBL_MAX;
[...]
if (f == DBL_MAX) { // f has not been changed yet
[....]
}
36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/*
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* Work around broken floating point limits on some systems.
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include_next <float.h>
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#ifdef FLT_MAX
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#undef FLT_MAX
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#define FLT_MAX 3.40282346638528859812e+38F
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#undef FLT_MIN
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#define FLT_MIN 1.17549435082228750797e-38F
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#undef DBL_MAX
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#define DBL_MAX ((double)1.79769313486231570815e+308L)
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#undef DBL_MIN
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#define DBL_MIN ((double)2.22507385850720138309e-308L)
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#endif
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