#ifdef _WIN32

#ifndef UNICODE

#define UNICODE

#endif

#endif

#include <memory></memory>

#include "tsystem.h"

//#include "tunicode.h"

#include "tfilepath_io.h"

#include "tconvert.h"

#include <time.h></time.h>

#include <sys timeb.h=""></sys>

#include <sys types.h=""></sys>

#include <sys stat.h=""></sys>

#include <errno.h></errno.h>

#include <set></set>

#include <tenv.h></tenv.h>

#undef PLATFORM

#ifdef _WIN32

#pragma warning(disable : 4996)

#define PLATFORM WIN32

#include <process.h></process.h>

#include <psapi.h></psapi.h>

#include <io.h></io.h>

#include <stdlib.h></stdlib.h>

#include <direct.h></direct.h>

#include <shellapi.h></shellapi.h>

// gmt: sulla mia macchina cosi' non compila!!!

// #include "winsock2.h"

// #include "lmcons.h"

#include <sys utime.h=""></sys>

#include <lm.h></lm.h>

#endif

#ifdef LINUX

#define PLATFORM LINUX

#include <grp.h></grp.h>

#include <utime.h></utime.h>

#include <sys param.h=""></sys>

#include <unistd.h></unistd.h>

#include <sys types.h=""></sys>

#include <stdio.h></stdio.h>

#include <unistd.h></unistd.h>

#include <dirent.h></dirent.h>

#include <sys dir.h=""></sys>

#include <sys sysinfo.h=""></sys>

#include <sys swap.h=""></sys>

#include <sys statfs.h=""></sys>

#include <pwd.h></pwd.h>

#include <mntent.h></mntent.h>

#include <dlfcn.h></dlfcn.h>

#include <utime.h></utime.h>

#include <sys time.h=""></sys>

#endif

#if defined(MACOSX)

#define PLATFORM MACOSX

#include <grp.h></grp.h>

#include <utime.h></utime.h>

#include <sys param.h=""></sys>

#include <unistd.h></unistd.h>

#include <sys types.h=""></sys>

#include <sys timeb.h=""> // for ftime</sys>

#include <stdio.h></stdio.h>

#include <unistd.h></unistd.h>

#include <dirent.h></dirent.h>

#include <sys dir.h=""></sys>

#include <sys param.h=""> // for getfsstat</sys>

#include <sys ucred.h=""></sys>

#include <sys mount.h=""></sys>

#include <pwd.h></pwd.h>

#include <dlfcn.h></dlfcn.h>

#include "Carbon/Carbon.h"

#endif

#ifdef __sgi

#define PLATFORM SGI

#include <sys param.h=""></sys>

#include <unistd.h></unistd.h>

#include <grp.h></grp.h>

#include <sys dir.h=""> // dirent.h</sys>

#include <sys utime.h=""></sys>

#include <sys swap.h=""></sys>

#include <sys statfs.h=""></sys>

#include <pwd.h></pwd.h>

#include <mntent.h></mntent.h>

#include <dlfcn.h></dlfcn.h>

#endif

#ifndef PLATFORM

PLATFORM_NOT_SUPPORTED

#endif

using namespace std;

#ifdef _WIN32

wstring getFormattedMessage(DWORD lastError)

{

	LPVOID lpMsgBuf;

	FormatMessage(

		FORMAT_MESSAGE_ALLOCATE_BUFFER |

			FORMAT_MESSAGE_FROM_SYSTEM |

			FORMAT_MESSAGE_IGNORE_INSERTS,

		NULL,

		lastError,

		MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language

		(LPTSTR)&lpMsgBuf,

		0,

		NULL);

	int wSize = MultiByteToWideChar(0, 0, (char *)lpMsgBuf, -1, 0, 0);

	if (!wSize)

		return wstring();

	std::unique_ptr<wchar_t[]> wBuffer(new wchar_t[wSize + 1]);</wchar_t[]>

	MultiByteToWideChar(0, 0, (char *)lpMsgBuf, -1, wBuffer.get(), wSize);

	wBuffer[wSize] = '\0';

	wstring wmsg(wBuffer.get());

	LocalFree(lpMsgBuf);

	return wmsg;

}

#endif

//------------------------------------------------------------

void TSystem::outputDebug(string s)

{

#ifdef TNZCORE_LIGHT

#ifdef _WIN32

	OutputDebugString((LPCWSTR)s.c_str());

#else

	cerr << s << endl;

#endif

#else

	qDebug(s.c_str());

#endif

}

//------------------------------------------------------------

int TSystem::getProcessId()

{

	return getpid();

}

//------------------------------------------------------------

bool TSystem::memoryShortage()

{

#ifdef _WIN32

	MEMORYSTATUSEX memStatus;

	memStatus.dwLength = sizeof(MEMORYSTATUSEX);

	GlobalMemoryStatusEx(&memStatus);

	assert(memStatus.ullAvailPhys <= memStatus.ullTotalPhys);

	if (memStatus.ullAvailPhys < memStatus.ullTotalPhys * 0.20) //if available memory is less then 20% of total memory

		return true;

	PROCESS_MEMORY_COUNTERS c;

	c.cb = sizeof(PROCESS_MEMORY_COUNTERS);

	BOOL ret = GetProcessMemoryInfo(GetCurrentProcess(), &c, sizeof(PROCESS_MEMORY_COUNTERS));

	assert(ret);

	return c.WorkingSetSize > memStatus.ullTotalVirtual * 0.6; //if total memory used by this process(WorkingSetSize) is

															   //half of max allocatable memory

															   //(ullTotalVirtual: on 32bits machines, tipically it's 2GB)

															   //It's better "to stay large"; for values >0.6 this function may

															   //returns that there is memory, but for fragmentation the malloc fails the same!

#elif defined(MACOSX)

	// to be done...

	return false;

#elif defined(LINUX)

	// to be done...

	return false;

#else

	@ @ @ERROR : PLATFORM NOT SUPPORTED

#endif

}

//------------------------------------------------------------

TINT64 TSystem::getFreeMemorySize(bool onlyPhisicalMemory)

{

	TINT64 totalFree = 0;

#ifdef _WIN32

	MEMORYSTATUSEX buff;

	buff.dwLength = sizeof(MEMORYSTATUSEX);

	GlobalMemoryStatusEx(&buff);

	if (onlyPhisicalMemory)

		return buff.ullAvailPhys >> 10;

	else

		return buff.ullAvailPageFile >> 10;

#elif defined(__sgi)

	//check for virtual memory

	int numberOfResources = swapctl(SC_GETNSWP, 0); /* get number of swapping resources configued */

	if (numberOfResources == 0)

		return 0;

	//avrei voluto fare: struct swaptable *table = new struct swaptable[...]

	struct swaptable *table = (struct swaptable *)calloc(1, sizeof(struct swapent) * numberOfResources + sizeof(int));

	table->swt_n = numberOfResources;

	swapctl(SC_LIST, table); /* list all the swapping resources */

	TINT64 virtualFree = 0;

	TINT64 physicalFree = 0;

	for (int i = 0; i < table->swt_n; i++) {

		virtualFree += table->swt_ent[i].ste_free;

	}

	free(table);

	totalFree = virtualFree << 4 + physicalFree;

#elif defined(LINUX)

	struct sysinfo *sysInfo = (struct sysinfo *)calloc(1, sizeof(struct sysinfo));

	if (!sysinfo(sysInfo)) {

		if (onlyPhisicalMemory)

			totalFree = sysInfo->freeram;

		else

			totalFree = sysInfo->freeram + sysInfo->freeswap;

	} else {

		assert(!"sysinfo function failed");

	}

	free(sysInfo);

#elif defined(MACOSX)

	// to be done...

	totalFree = 512 * 1024;

#else

	@ @ @ERROR : PLATFORM NOT SUPPORTED

#endif

#ifndef _WIN32

#else

#endif

	return totalFree;

}

//------------------------------------------------------------

/*

ostream& operator<<(ostream&out, const TTime  &t)

{

  return out<

}

*/

//------------------------------------------------------------

TINT64 TSystem::getDiskSize(const TFilePath &diskName)

{

	TINT64 size = 0;

	if (!diskName.isAbsolute()) {

		assert(0);

		return 0;

	}

#ifndef _WIN32

	struct statfs buf;

#ifdef __sgi

	statfs(::to_string(diskName).c_str(), &buf, sizeof(struct statfs), 0);

#else

	statfs(::to_string(diskName).c_str(), &buf);

#endif

	size = (TINT64)((buf.f_blocks * buf.f_bsize) >> 10);

#else

	DWORD sectorsPerCluster;	// sectors per cluster

	DWORD bytesPerSector;		// bytes per sector

	DWORD numberOfFreeClusters; // free clusters

	DWORD totalNumberOfClusters;

	BOOL rc = GetDiskFreeSpaceW(

		diskName.getWideString().c_str(), // root path

		§orsPerCluster,				  // sectors per cluster

		&bytesPerSector,				  // bytes per sector

		&numberOfFreeClusters,			  // free clusters

		&totalNumberOfClusters			  // total clusters

		);

	if (!rc)

		throw TSystemException(diskName, getFormattedMessage(GetLastError()));

	else

		size = (totalNumberOfClusters * sectorsPerCluster * bytesPerSector) >> 10;

#endif

	return size;

}

//------------------------------------------------------------

TINT64 TSystem::getFreeDiskSize(const TFilePath &diskName)

{

	TINT64 size = 0;

	if (!diskName.isAbsolute()) {

		assert(0);

		return 0;

	}

#ifndef _WIN32

	struct statfs buf;

#ifdef __sgi

	statfs(diskName.getWideString().c_str(), &buf, sizeof(struct statfs), 0);

#else

	statfs(::to_string(diskName).c_str(), &buf);

#endif

	size = (TINT64)(buf.f_bfree * buf.f_bsize) >> 10;

#else

	DWORD sectorsPerCluster;	// sectors per cluster

	DWORD bytesPerSector;		// bytes per sector

	DWORD numberOfFreeClusters; // free clusters

	DWORD totalNumberOfClusters;

	BOOL rc = GetDiskFreeSpaceW(diskName.getWideString().c_str(), // root path

								§orsPerCluster,				  // sectors per cluster

								&bytesPerSector,				  // bytes per sector

								&numberOfFreeClusters,			  // free clusters

								&totalNumberOfClusters			  // total clusters

								);

	if (!rc) //eccezione... getLastError etc...

		throw TSystemException(diskName, "cannot get disk info!");

	else

		size = (numberOfFreeClusters * sectorsPerCluster * bytesPerSector) >> 10;

#endif

	return size;

}

//------------------------------------------------------------

TINT64 TSystem::getMemorySize(bool onlyPhisicalMemory)

{

#ifdef _WIN32

	MEMORYSTATUS buff;

	GlobalMemoryStatus(&buff);

	if (onlyPhisicalMemory)

		return buff.dwTotalPhys >> 10;

	else

		return buff.dwTotalPageFile >> 10;

#elif defined(__sgi)

	int physicalMemory;

	if (swapctl(SC_GETSWAPMAX, &physicalMemory))

		return ((size_t)0);

	else

		return logSwapLibero >> 1;

#elif defined(LINUX)

	struct sysinfo *sysInfo = (struct sysinfo *)calloc(1, sizeof(struct sysinfo));

	TINT64 ret = 0;

	if (!sysinfo(sysInfo))

		ret = sysInfo->totalram;

	else

		assert(!"sysinfo function failed");

	free(sysInfo);

	return ret;

#elif defined(MACOSX)

	// to be done...

	return 512 * 1024;

#else

	@ @ @ERROR : PLATFORM NOT SUPPORTED

#endif

#ifndef _WIN32

#else

#endif

}

//------------------------------------------------------------

void TSystem::moveFileToRecycleBin(const TFilePath &fp)

{

#if defined(_WIN32)

	//

	// from http://msdn.microsoft.com/msdnmag/issues/01/04/c/default.aspx

	//

	// Copy pathname to double-NULL-terminated string.

	//

	wchar_t buf[_MAX_PATH + 1];				 // allow one more character

	wcscpy(buf, fp.getWideString().c_str()); // copy caller's path name

	buf[wcslen(buf) + 1] = 0;				 // need two NULLs at end

	SHFILEOPSTRUCTW data;

	memset(&data, 0, sizeof(SHFILEOPSTRUCTW));

	data.fFlags |= FOF_SILENT;		   // don't report progress

	data.fFlags |= FOF_NOERRORUI;	  // don't report errors

	data.fFlags |= FOF_NOCONFIRMATION; // don't confirm delete

	data.wFunc = FO_DELETE;			   // REQUIRED: delete operation

	data.pFrom = buf;				   // REQUIRED: which file(s)

	data.pTo = NULL;				   // MUST be NULL

	data.fFlags |= FOF_ALLOWUNDO;	  // ..send to Recycle Bin

	int ret = SHFileOperationW(&data); // do it!

#elif defined(MACOSX)

	FSRef foundRef;

	OSErr err = FSFindFolder(kOnSystemDisk,

							 kTrashFolderType, kDontCreateFolder,

							 &foundRef);

	if (err) {

		assert(false);

		deleteFile(fp);

		return;

	}

	UInt8 path[255];

	err = FSRefMakePath(&foundRef, path, 254);

	if (err) {

		assert(false);

		deleteFile(fp);

		return;

	}

	//TFilePath dest = TFilePath(path)+(fp.getName()+fp.getDottedType());

	string fullNameWithExt = ::to_string(fp);

	int i = fullNameWithExt.rfind("/");

	string nameWithExt = fullNameWithExt.substr(i + 1);

	TFilePath dest = TFilePath((char *)path) + nameWithExt;

	try {

		renameFile(dest, fp);

	} catch (...) {

		try {

			copyFile(dest, fp);

			deleteFile(fp);

		} catch (...) {

		}

	}

#else

	assert(!"Not implemented yet");

#endif

}

//------------------------------------------------------------

TString TSystemException::getMessage() const

{

	wstring msg;

	switch (m_err) {

	case -1: msg = m_msg; break; // // nothing

	case EEXIST: msg = L": Directory was not created because filename is the name of an existing file, directory, or device"; break;

	case ENOENT: msg = L": Path was not found, or the named file does not exist or is a null pathname."; break;

	case ENOTEMPTY: msg = L": Given path is not a directory; directory is not empty; or directory is either current working directory or root directory"; break;

	case EACCES: msg = L": Search permission is denied by a component of the path prefix, or write permission on the file named by path is denied, or times is NULL, and write access is denied"; break;

	case EFAULT: msg = L": Times is not NULL and, or points outside the process's allocated address space."; break;

	case EINTR: msg = L": A signal was caught during the utime system call."; break;

	case ENAMETOOLONG: msg = L": The length of the path argument exceeds {PATH_MAX}, or the length of a path component exceeds {NAME_MAX} while _POSIX_NO_TRUNC is in effect."; break;

	case ENOTDIR: msg = L": A component of the path prefix is not a directory."; break;

	case EPERM: msg = L": The calling process does not have the super-user privilege, the effective user ID is not the owner of the file, and times is not NULL, or the file system containing the file is mounted read-only"; break;

	case EROFS: msg = L": The current file system level range does not envelop the level of the file named by path, and the calling process does not have the super-user privilege."; break;

	case ENOSYS: msg = L": When the named file cannot have its time reset.  The file is on a file system that doesn't have this operation."; break;

	case EMFILE: msg = L": The maximum number of file descriptors are currently open."; break;

	case ENFILE: msg = L": The system file table is full."; break;

	case EBADF: msg = L": The file descriptor determined by the DIR stream is no longer valid.  This result occurs if the DIR stream has been closed."; break;

	case EINVAL: msg = L": 64-bit and non-64-bit calls were mixed in a sequence of calls."; break;

	default: msg = L": Unknown error"; break;

#ifndef _WIN32

	case ELOOP: msg = L": Too many symbolic links were encountered in translating path."; break;

#ifndef MACOSX

	case EMULTIHOP: msg = L": Components of path require hopping to multiple remote machines and the file system does not allow it."; break;

	case ENOLINK: msg = L": Path points to a remote machine and the link to that machine is no longer active."; break;

#endif

#if defined(__sgi)

	case EDIRCORRUPTED: msg = L": The directory is corrupted on disk."; break;

#endif

	case EOVERFLOW: msg = L": One of the inode number values or offset values did not fit in 32 bits, and the 64-bit interfaces were not used."; break;

#endif

	}

	return m_fname.getWideString() + L"\n" + msg;

}

//------------------------------------------------------------

void TSystem::touchFile(const TFilePath &path)

{

#ifndef TNZCORE_LIGHT

	// string filename = path.getFullPath();

	if (TFileStatus(path).doesExist()) {

		int ret;

#ifdef _WIN32

		ret = _wutime(path.getWideString().c_str(), 0);

#else

		ret = utimes(::to_string(path).c_str(), 0);

#endif

		if (0 != ret)

			throw TSystemException(path, errno);

	} else {

		Tofstream file(path);

		if (!file) {

			throw TSystemException(path, errno);

		}

		file.close(); // altrimenti il compilatore da' un warning:

					  // variabile non utilizzata

	}

#endif

}

//------------------------------------------------------------