Show fpconst.cpp syntax highlighted
/*
* Copyright (C) 2003 Apple Computer, Inc.
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
// This file exists because JavaScriptCore needs to define the NaN and Inf globals in a way
// that does not use a static initializer so we don't have a framework initialization routine.
// The trick is to define the NaN and Inf globals with a different type than the declaration.
// This trick works because the mangled name of the globals does not include the type, although
// I'm not sure that's guaranteed. There could be alignment issues with this, since arrays of
// characters don't necessarily need the same alignment doubles do, but for now it seems to work.
// It would be good to figure out a 100% clean way that still avoids code that runs at init time.
namespace KJS {
#ifdef WORDS_BIGENDIAN
extern const unsigned char NaN[sizeof(double)] = { 0x7f, 0xf8, 0, 0, 0, 0, 0, 0 };
extern const unsigned char Inf[sizeof(double)] = { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 };
#if KWIQ
#elif defined(arm)
extern const unsigned char NaN_Bytes[sizeof(double)] = { 0, 0, 0xf8, 0x7f, 0, 0, 0, 0 };
extern const unsigned char Inf_Bytes[sizeof(double)] = { 0, 0, 0xf0, 0x7f, 0, 0, 0, 0 };
#endif
#else
extern const unsigned char NaN[sizeof(double)] = { 0, 0, 0, 0, 0, 0, 0xf8, 0x7f };
extern const unsigned char Inf[sizeof(double)] = { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f };
#endif
};
See more files for this project here