// C RunTime Header Files
#ifndef GWEN_MACROS_H
#define GWEN_MACROS_H
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>  // vsnprintf
#if !defined(__APPLE__) && !defined(__OpenBSD__) && !defined(__FreeBSD__)
#include <malloc.h>
#else
#include <stdlib.h>
#endif  //__APPLE__
#include <memory.h>
#include <algorithm>

// Not tied to platform api.
#define GwenUtil_Min(a, b) (((a) < (b)) ? (a) : (b))
#define GwenUtil_Max(a, b) (((a) > (b)) ? (a) : (b))
#define GwenUtil_VSWPrintFSafeSized(_DstBuf_ARRAY_, _Format, _ArgList) GwenUtil_VSWPrintFSafe(_DstBuf_ARRAY_, sizeof(_DstBuf_ARRAY_) / sizeof(wchar_t), _Format, _ArgList)

#ifdef _MSC_VER

#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <windows.h>

#define GwenUtil_VSNPrintFSafe(_DstBuf, _DstSize, _MaxCount, _Format, _ArgList) vsnprintf_s(_DstBuf, _DstSize, _MaxCount, _Format, _ArgList)
#define GwenUtil_VSWPrintFSafe(_DstBuf, _SizeInWords, _Format, _ArgList) vswprintf_s(_DstBuf, _SizeInWords, _Format, _ArgList)
#define GwenUtil_OutputDebugCharString(lpOutputString) OutputDebugStringA(lpOutputString)
#define GwenUtil_OutputDebugWideString(lpOutputString) OutputDebugStringW(lpOutputString)
#define GwenUtil_WideStringToFloat(_Str) _wtof(_Str)

#elif defined(__APPLE__)

#include <CoreFoundation/CoreFoundation.h>

#define GwenUtil_VSNPrintFSafe(_DstBuf, _DstSize, _MaxCount, _Format, _ArgList) vsnprintf(_DstBuf, _DstSize, _Format, _ArgList)
#define GwenUtil_VSWPrintFSafe(_DstBuf, _SizeInWords, _Format, _ArgList) vswprintf(_DstBuf, _SizeInWords, _Format, _ArgList)
#define GwenUtil_OutputDebugCharString(lpOutputString)  //printf( lpOutputString )
#define GwenUtil_OutputDebugWideString(lpOutputString)  //wprintf( lpOutputString  )
#define GwenUtil_WideStringToFloat(_Str) wcstof(_Str, NULL)

#elif defined(__linux__) || defined(__GNUC__)

#define GwenUtil_VSNPrintFSafe(_DstBuf, _DstSize, _MaxCount, _Format, _ArgList) vsnprintf(_DstBuf, _DstSize, _Format, _ArgList)
#ifdef _WIN32
#define GwenUtil_VSWPrintFSafe(_DstBuf, _SizeInWords, _Format, _ArgList) vsnwprintf(_DstBuf, _SizeInWords, _Format, _ArgList)
#else
#define GwenUtil_VSWPrintFSafe(_DstBuf, _SizeInWords, _Format, _ArgList) vswprintf(_DstBuf, _SizeInWords, _Format, _ArgList)
#endif
#define GwenUtil_OutputDebugCharString(lpOutputString)  //printf( lpOutputString )
#define GwenUtil_OutputDebugWideString(lpOutputString)  //wprintf( lpOutputString  )
#define GwenUtil_WideStringToFloat(_Str) wcstof(_Str, NULL)

#else

#error MUST_IMPLEMENT_PLATFORM

#endif

namespace Gwen
{
template <typename T1, typename T2, typename T3>
T1 Clamp(T1 current, T2 vmin, T3 vmax)
{
	if (current > vmax) return (T1)vmax;
	if (current < vmin) return (T1)vmin;
	return current;
}

template <typename T, typename T2>
inline T Approach(T fCurrent, T fTarget, T2 fDelta)
{
	if (fCurrent < fTarget)
	{
		fCurrent += fDelta;
		if (fCurrent > fTarget) return fTarget;
	}
	else if (fCurrent > fTarget)
	{
		fCurrent -= fDelta;
		if (fCurrent < fTarget) return fTarget;
	}

	return fCurrent;
}
}  // namespace Gwen

#endif