CWE-ou-minkata/Sources/Plasma/NucleusLib/pnUtils/Private/Win32/pnUtW32Misc.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
/*****************************************************************************
*
*	$/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Private/Win32/pnUtW32Misc.cpp
*	
***/

#include "../../Pch.h"
#pragma	hdrstop

/*****************************************************************************
*
*	Private
*
***/
static MEMORYSTATUSEX s_memstatus;

/*****************************************************************************
*
*	Exports
*
***/

//============================================================================
const wchar	* AppGetCommandLine	() {
	return GetCommandLineW();
}

//============================================================================
void MachineGetName	(wchar *computerName, unsigned int length) {
	DWORD len =	length;
	GetComputerNameW(computerName, &len);
}

/*****************************************************************************
*
*	System status
*
***/

//============================================================================
void MemoryGetStatus (MemoryStatus * status) {
	MEMORYSTATUSEX mem;
	mem.dwLength = sizeof(mem);
	GlobalMemoryStatusEx(&mem);

	const qword	BYTES_PER_MB = 1024	* 1024;
	status->totalPhysMB			= unsigned(mem.ullTotalPhys		/ BYTES_PER_MB);
	status->availPhysMB			= unsigned(mem.ullAvailPhys		/ BYTES_PER_MB);
	status->totalPageFileMB		= unsigned(mem.ullTotalPageFile	/ BYTES_PER_MB);
	status->availPageFileMB		= unsigned(mem.ullAvailPageFile	/ BYTES_PER_MB);
	status->totalVirtualMB		= unsigned(mem.ullTotalVirtual	/ BYTES_PER_MB);   
	status->availVirtualMB		= unsigned(mem.ullAvailVirtual	/ BYTES_PER_MB);
	status->memoryLoad			= mem.dwMemoryLoad;
}

//============================================================================
void DiskGetStatus (ARRAY(DiskStatus) *	disks) {
	for	(;;) {
		DWORD length = GetLogicalDriveStrings(0, NULL);
		if (!length	|| length >	2048)
			break;

		wchar *	buffer = ALLOCA(wchar, length +	1);
		if (!GetLogicalDriveStringsW(length, buffer))
			break;

		for	(; *buffer;	buffer += StrLen(buffer) + 1) {
			UINT driveType = GetDriveTypeW(buffer);
			if (driveType != DRIVE_FIXED)
				continue;

			ULARGE_INTEGER freeBytes;
			ULARGE_INTEGER totalBytes;
			if (!GetDiskFreeSpaceExW(buffer, &freeBytes, &totalBytes, NULL))
				continue;

			DiskStatus status;
			StrCopy(status.name, buffer, arrsize(status.name));

			const qword	BYTES_PER_MB = 1024	* 1024;
			status.totalSpaceMB	= unsigned(totalBytes.QuadPart / BYTES_PER_MB);
			status.freeSpaceMB	= unsigned(freeBytes.QuadPart  / BYTES_PER_MB);

			disks->Add(status);
		}
		break;
	}
}

//============================================================================
// Loosely taken from MS's cpuid code sample
void CpuGetInfo (
	word *	cpuCaps,
	dword *	cpuVendor,
	word *	cpuSignature
) {
	dword signature	= 0;
	dword extended	= 0;
	dword flags[2]	= {	0, 0 };
	cpuVendor[0]	= 0;

	_asm {
		// Detect if cpuid instruction is supported	by attempting
		// to change the ID	bit	of EFLAGS
		pushfd
		pop	eax				// get EFLAGS
		mov	ecx, eax		// store copy of original EFLAGS
		xor	eax, 0x200000	// flip	ID bit 
		push eax
		popfd				// replace EFLAGS
		pushfd				// get EFLAGS
		pop	eax
		xor	eax, ecx
		je DONE

		// Get processor id	(GenuineIntel, AuthenticAMD, etc)
		xor	eax, eax
		cpuid
		mov	edi, cpuVendor
		mov	[edi + 0], ebx
		mov	[edi + 4], edx
		mov	[edi + 8], ecx

		// Check if	capability flags are supported
		cmp	eax, 1
		jl DONE

		// Get processor capability flags and signature
		mov	eax, 1
		cpuid
		mov	signature, eax
		mov	[flags + 0], edx
		mov	[flags + 4], ecx

		// Check for extended capabilities
		mov	eax, 0x80000000
		cpuid
		cmp	eax, 0x80000001
		jl DONE

		// Get extended	capabilities
		mov	eax, 0x80000001
		cpuid
		mov	extended, edx

DONE:
	}

	// Decode capability flags
	const static struct	CpuCap {
		word	cpuFlag;
		byte	field;
		byte	bit;
	} s_caps[] = {
		// feature		field	bit
		// -------		-----	---
		{ kCpuCapCmov,	0,		15	},
		{ kCpuCapEst,	1,		7	},
		{ kCpuCapHtt,	0,		28	},
		{ kCpuCapMmx,	0,		23	},
		{ kCpuCapPsn,	0,		18	},
		{ kCpuCapSse,	0,		25	},
		{ kCpuCapSse2,	0,		26	},
		{ kCpuCapSse3,	1,		0	},
		{ kCpuCapTsc,	0,		4	},
	};
	for	(unsigned i	= 0; i < arrsize(s_caps); ++i) {
		const CpuCap & cap = s_caps[i];
		if (flags[cap.field] & (1 << cap.bit))
			*cpuCaps |=	cap.cpuFlag;
	}

	// Copy	signature
	*cpuSignature =	word(signature & 0xfff);

	// If this is an AMD CPU, check	for	3DNow support
	const char * vendorAmd = "AuthenticAMD";
	if (!MemCmp(vendorAmd, cpuVendor, 12)) {
		if (extended & (1 << 31))
			*cpuCaps |=	kCpuCap3dNow;
	}
}