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/* Copyright (C) 2010 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* emulate a subset of POSIX on Win32.
*/
#ifndef INCLUDED_WPOSIX
#define INCLUDED_WPOSIX
/**
* rationale: the Windows headers declare many POSIX functions (e.g. read).
* unfortunately, these are often slightly incorrect (size_t vs. size_t).
* to avert trouble in user code caused by these differences, we declare
* all functions ourselves according to SUSv3 and do not use the headers.
*
* however, it does not end there. some other libraries (e.g. wxWidgets)
* will want to pull in these headers, which would conflict with our
* declarations. also, our implementation uses the actual CRT code,
* so we want those functions (e.g. _read) to be declared correctly even
* if switching compiler/CRT version.
*
* how can these conflicting requirements be reconciled? our headers \#include
* "no_crt_posix.h" to \#define the CRT headers' include guards and thus
* prevent them from declaring anything. the implementation files \#include
* "crt_posix.h", which pulls in the CRT headers (even if "no_crt_posix.h"
* was previously included, e.g. in the PCH). note that the CRT headers
* would still cause conflicts with the POSIX function declarations,
* but we are able to prevent this via __STDC__.
**/
//
// <stdlib.h>
//
LIB_API int setenv(const char* envname, const char* envval, int overwrite);
//
// <math.h>
//
// (missing on MSVC)
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#ifndef M_PI_2
#define M_PI_2 1.57079632679489661923
#endif
#ifndef INFINITY
#define INFINITY (std::numeric_limits<float>::infinity())
#endif
#ifndef NAN
#define NAN (std::numeric_limits<float>::quiet_NaN())
#endif
#endif // #ifndef INCLUDED_WPOSIX
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