FFmpeg/compat/float/float.h

/*
 * Work around broken floating point limits on some systems.
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include_next <float.h>

#ifdef FLT_MAX
#undef  FLT_MAX
#define FLT_MAX 3.40282346638528859812e+38F

#undef  FLT_MIN
#define FLT_MIN 1.17549435082228750797e-38F

#undef  DBL_MAX
#define DBL_MAX ((double)1.79769313486231570815e+308L)

#undef  DBL_MIN
#define DBL_MIN ((double)2.22507385850720138309e-308L)
#endif
Work around broken floating point limits on some systems. 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 [....] } 2013-11-14 14:19:04 +03:00			`/*`
			`* Work around broken floating point limits on some systems.`
			`*`
Merge remote-tracking branch 'qatar/master' * qatar/master: Work around broken floating point limits on some systems. Merged-by: Michael Niedermayer <michaelni@gmx.at> 2014-03-10 14:03:29 +03:00			`* This file is part of FFmpeg.`
Work around broken floating point limits on some systems. 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 [....] } 2013-11-14 14:19:04 +03:00			`*`
Merge remote-tracking branch 'qatar/master' * qatar/master: Work around broken floating point limits on some systems. Merged-by: Michael Niedermayer <michaelni@gmx.at> 2014-03-10 14:03:29 +03:00			`* FFmpeg is free software; you can redistribute it and/or`
Work around broken floating point limits on some systems. 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 [....] } 2013-11-14 14:19:04 +03:00			`* modify it under the terms of the GNU Lesser General Public`
			`* License as published by the Free Software Foundation; either`
			`* version 2.1 of the License, or (at your option) any later version.`
			`*`
Merge remote-tracking branch 'qatar/master' * qatar/master: Work around broken floating point limits on some systems. Merged-by: Michael Niedermayer <michaelni@gmx.at> 2014-03-10 14:03:29 +03:00			`* FFmpeg is distributed in the hope that it will be useful,`
Work around broken floating point limits on some systems. 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 [....] } 2013-11-14 14:19:04 +03:00			`* but WITHOUT ANY WARRANTY; without even the implied warranty of`
			`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
			`* Lesser General Public License for more details.`
			`*`
			`* You should have received a copy of the GNU Lesser General Public`
Merge remote-tracking branch 'qatar/master' * qatar/master: Work around broken floating point limits on some systems. Merged-by: Michael Niedermayer <michaelni@gmx.at> 2014-03-10 14:03:29 +03:00			`* License along with FFmpeg; if not, write to the Free Software`
Work around broken floating point limits on some systems. 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 [....] } 2013-11-14 14:19:04 +03:00			`* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA`
			`*/`

			`#include_next <float.h>`

			`#ifdef FLT_MAX`
			`#undef FLT_MAX`
			`#define FLT_MAX 3.40282346638528859812e+38F`

			`#undef FLT_MIN`
			`#define FLT_MIN 1.17549435082228750797e-38F`

			`#undef DBL_MAX`
			`#define DBL_MAX ((double)1.79769313486231570815e+308L)`

			`#undef DBL_MIN`
			`#define DBL_MIN ((double)2.22507385850720138309e-308L)`
			`#endif`