v8/src/dtoa-config.c

90 lines
3.6 KiB
C

/*
* Copyright 2007-2008 the V8 project authors. All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Dtoa needs to have a particular environment set up for it so
* instead of using it directly you should use this file.
*
* The way it works is that when you link with it, its definitions
* of dtoa, strtod etc. override the default ones. So if you fail
* to link with this library everything will still work, it's just
* subtly wrong.
*/
#if !(defined(__APPLE__) && defined(__MACH__)) && \
!defined(WIN32) && !defined(__FreeBSD__)
#include <endian.h>
#endif
#include <math.h>
#include <float.h>
/* The floating point word order on ARM is big endian when floating point
* emulation is used, even if the byte order is little endian */
#if !(defined(__APPLE__) && defined(__MACH__)) && !defined(WIN32) && \
!defined(__FreeBSD__) && __FLOAT_WORD_ORDER == __BIG_ENDIAN
#define IEEE_MC68k
#else
#define IEEE_8087
#endif
#define __MATH_H__
#if defined(__APPLE__) && defined(__MACH__) || defined(__FreeBSD__)
/* stdlib.h on FreeBSD and Apple's 10.5 and later SDKs will mangle the
* name of strtod. If it's included after strtod is redefined as
* gay_strtod, it will mangle the name of gay_strtod, which is
* unwanted. */
#include <stdlib.h>
#endif
/* stdlib.h on Windows adds __declspec(dllimport) to all functions when using
* the DLL version of the CRT (compiling with /MD or /MDd). If stdlib.h is
* included after strtod is redefined as gay_strtod, it will add
* __declspec(dllimport) to gay_strtod, which causes the compilation of
* gay_strtod in dtoa.c to fail.
*/
#if defined(WIN32) && defined(_DLL)
#include "stdlib.h"
#endif
/* For MinGW, turn on __NO_ISOCEXT so that its strtod doesn't get added */
#ifdef __MINGW32__
#define __NO_ISOCEXT
#endif /* __MINGW32__ */
/* On 64-bit systems, we need to make sure that a Long is only 32 bits. */
#ifdef V8_TARGET_ARCH_X64
#define Long int
#endif /* V8_TARGET_ARCH_X64 */
/* Make sure we use the David M. Gay version of strtod(). On Linux, we
* cannot use the same name (maybe the function does not have weak
* linkage?). */
#define strtod gay_strtod
#include "third_party/dtoa/dtoa.c"