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-rwxr-xr-xCPP/Windows/FileIO.cpp434
1 files changed, 434 insertions, 0 deletions
diff --git a/CPP/Windows/FileIO.cpp b/CPP/Windows/FileIO.cpp
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+++ b/CPP/Windows/FileIO.cpp
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+// Windows/FileIO.cpp
+
+#include "StdAfx.h"
+
+#include "FileIO.h"
+
+#if defined(WIN_LONG_PATH) || defined(SUPPORT_DEVICE_FILE)
+#include "../Common/MyString.h"
+#endif
+#ifndef _UNICODE
+#include "../Common/StringConvert.h"
+#endif
+
+#ifndef _UNICODE
+extern bool g_IsNT;
+#endif
+
+namespace NWindows {
+namespace NFile {
+
+#ifdef SUPPORT_DEVICE_FILE
+bool IsDeviceName(LPCTSTR n)
+{
+ #ifdef UNDER_CE
+ int len = (int)MyStringLen(n);
+ if (len < 5 || len > 5 || memcmp(n, TEXT("DSK"), 3 * sizeof(TCHAR)) != 0)
+ return false;
+ if (n[4] != ':')
+ return false;
+ // for reading use SG_REQ sg; if (DeviceIoControl(dsk, IOCTL_DISK_READ));
+ #else
+ if (n[0] != '\\' || n[1] != '\\' || n[2] != '.' || n[3] != '\\')
+ return false;
+ int len = (int)MyStringLen(n);
+ if (len == 6 && n[5] == ':')
+ return true;
+ if (len < 18 || len > 22 || memcmp(n + 4, TEXT("PhysicalDrive"), 13 * sizeof(TCHAR)) != 0)
+ return false;
+ for (int i = 17; i < len; i++)
+ if (n[i] < '0' || n[i] > '9')
+ return false;
+ #endif
+ return true;
+}
+
+#ifndef _UNICODE
+bool IsDeviceName(LPCWSTR n)
+{
+ if (n[0] != '\\' || n[1] != '\\' || n[2] != '.' || n[3] != '\\')
+ return false;
+ int len = (int)wcslen(n);
+ if (len == 6 && n[5] == ':')
+ return true;
+ if (len < 18 || len > 22 || wcsncmp(n + 4, L"PhysicalDrive", 13) != 0)
+ return false;
+ for (int i = 17; i < len; i++)
+ if (n[i] < '0' || n[i] > '9')
+ return false;
+ return true;
+}
+#endif
+#endif
+
+#if defined(WIN_LONG_PATH) && defined(_UNICODE)
+#define WIN_LONG_PATH2
+#endif
+
+#ifdef WIN_LONG_PATH
+bool GetLongPathBase(LPCWSTR s, UString &res)
+{
+ res.Empty();
+ int len = MyStringLen(s);
+ wchar_t c = s[0];
+ if (len < 1 || c == L'\\' || c == L'.' && (len == 1 || len == 2 && s[1] == L'.'))
+ return true;
+ UString curDir;
+ bool isAbs = false;
+ if (len > 3)
+ isAbs = (s[1] == L':' && s[2] == L'\\' && (c >= L'a' && c <= L'z' || c >= L'A' && c <= L'Z'));
+
+ if (!isAbs)
+ {
+ DWORD needLength = ::GetCurrentDirectoryW(MAX_PATH + 1, curDir.GetBuffer(MAX_PATH + 1));
+ curDir.ReleaseBuffer();
+ if (needLength == 0 || needLength > MAX_PATH)
+ return false;
+ if (curDir[curDir.Length() - 1] != L'\\')
+ curDir += L'\\';
+ }
+ res = UString(L"\\\\?\\") + curDir + s;
+ return true;
+}
+
+bool GetLongPath(LPCWSTR path, UString &longPath)
+{
+ if (GetLongPathBase(path, longPath))
+ return !longPath.IsEmpty();
+ return false;
+}
+#endif
+
+namespace NIO {
+
+CFileBase::~CFileBase() { Close(); }
+
+bool CFileBase::Create(LPCTSTR fileName, DWORD desiredAccess,
+ DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
+{
+ if (!Close())
+ return false;
+ _handle = ::CreateFile(fileName, desiredAccess, shareMode,
+ (LPSECURITY_ATTRIBUTES)NULL, creationDisposition,
+ flagsAndAttributes, (HANDLE)NULL);
+ #ifdef WIN_LONG_PATH2
+ if (_handle == INVALID_HANDLE_VALUE)
+ {
+ UString longPath;
+ if (GetLongPath(fileName, longPath))
+ _handle = ::CreateFileW(longPath, desiredAccess, shareMode,
+ (LPSECURITY_ATTRIBUTES)NULL, creationDisposition,
+ flagsAndAttributes, (HANDLE)NULL);
+ }
+ #endif
+ #ifdef SUPPORT_DEVICE_FILE
+ IsDeviceFile = false;
+ #endif
+ return (_handle != INVALID_HANDLE_VALUE);
+}
+
+#ifndef _UNICODE
+bool CFileBase::Create(LPCWSTR fileName, DWORD desiredAccess,
+ DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
+{
+ if (!g_IsNT)
+ return Create(UnicodeStringToMultiByte(fileName, ::AreFileApisANSI() ? CP_ACP : CP_OEMCP),
+ desiredAccess, shareMode, creationDisposition, flagsAndAttributes);
+ if (!Close())
+ return false;
+ _handle = ::CreateFileW(fileName, desiredAccess, shareMode,
+ (LPSECURITY_ATTRIBUTES)NULL, creationDisposition,
+ flagsAndAttributes, (HANDLE)NULL);
+ #ifdef WIN_LONG_PATH
+ if (_handle == INVALID_HANDLE_VALUE)
+ {
+ UString longPath;
+ if (GetLongPath(fileName, longPath))
+ _handle = ::CreateFileW(longPath, desiredAccess, shareMode,
+ (LPSECURITY_ATTRIBUTES)NULL, creationDisposition,
+ flagsAndAttributes, (HANDLE)NULL);
+ }
+ #endif
+ #ifdef SUPPORT_DEVICE_FILE
+ IsDeviceFile = false;
+ #endif
+ return (_handle != INVALID_HANDLE_VALUE);
+}
+#endif
+
+bool CFileBase::Close()
+{
+ if (_handle == INVALID_HANDLE_VALUE)
+ return true;
+ if (!::CloseHandle(_handle))
+ return false;
+ _handle = INVALID_HANDLE_VALUE;
+ return true;
+}
+
+bool CFileBase::GetPosition(UInt64 &position) const
+{
+ return Seek(0, FILE_CURRENT, position);
+}
+
+bool CFileBase::GetLength(UInt64 &length) const
+{
+ #ifdef SUPPORT_DEVICE_FILE
+ if (IsDeviceFile && LengthDefined)
+ {
+ length = Length;
+ return true;
+ }
+ #endif
+
+ DWORD sizeHigh;
+ DWORD sizeLow = ::GetFileSize(_handle, &sizeHigh);
+ if (sizeLow == 0xFFFFFFFF)
+ if (::GetLastError() != NO_ERROR)
+ return false;
+ length = (((UInt64)sizeHigh) << 32) + sizeLow;
+ return true;
+}
+
+bool CFileBase::Seek(Int64 distanceToMove, DWORD moveMethod, UInt64 &newPosition) const
+{
+ #ifdef SUPPORT_DEVICE_FILE
+ if (IsDeviceFile && LengthDefined && moveMethod == FILE_END)
+ {
+ distanceToMove += Length;
+ moveMethod = FILE_BEGIN;
+ }
+ #endif
+
+ LARGE_INTEGER value;
+ value.QuadPart = distanceToMove;
+ value.LowPart = ::SetFilePointer(_handle, value.LowPart, &value.HighPart, moveMethod);
+ if (value.LowPart == 0xFFFFFFFF)
+ if (::GetLastError() != NO_ERROR)
+ return false;
+ newPosition = value.QuadPart;
+ return true;
+}
+
+bool CFileBase::Seek(UInt64 position, UInt64 &newPosition)
+{
+ return Seek(position, FILE_BEGIN, newPosition);
+}
+
+bool CFileBase::SeekToBegin()
+{
+ UInt64 newPosition;
+ return Seek(0, newPosition);
+}
+
+bool CFileBase::SeekToEnd(UInt64 &newPosition)
+{
+ return Seek(0, FILE_END, newPosition);
+}
+
+bool CFileBase::GetFileInformation(CByHandleFileInfo &fileInfo) const
+{
+ BY_HANDLE_FILE_INFORMATION winFileInfo;
+ if (!::GetFileInformationByHandle(_handle, &winFileInfo))
+ return false;
+ fileInfo.Attrib = winFileInfo.dwFileAttributes;
+ fileInfo.CTime = winFileInfo.ftCreationTime;
+ fileInfo.ATime = winFileInfo.ftLastAccessTime;
+ fileInfo.MTime = winFileInfo.ftLastWriteTime;
+ fileInfo.VolumeSerialNumber = winFileInfo.dwFileAttributes;
+ fileInfo.Size = (((UInt64)winFileInfo.nFileSizeHigh) << 32) + winFileInfo.nFileSizeLow;
+ fileInfo.NumberOfLinks = winFileInfo.nNumberOfLinks;
+ fileInfo.FileIndex = (((UInt64)winFileInfo.nFileIndexHigh) << 32) + winFileInfo.nFileIndexLow;
+ return true;
+}
+
+/////////////////////////
+// CInFile
+
+#ifdef SUPPORT_DEVICE_FILE
+void CInFile::GetDeviceLength()
+{
+ if (_handle != INVALID_HANDLE_VALUE && IsDeviceFile)
+ {
+ #ifdef UNDER_CE
+ LengthDefined = true;
+ Length = 128 << 20;
+
+ #else
+ PARTITION_INFORMATION partInfo;
+ LengthDefined = true;
+ Length = 0;
+
+ if (GetPartitionInfo(&partInfo))
+ Length = partInfo.PartitionLength.QuadPart;
+ else
+ {
+ DISK_GEOMETRY geom;
+ if (!GetGeometry(&geom))
+ if (!GetCdRomGeometry(&geom))
+ LengthDefined = false;
+ if (LengthDefined)
+ Length = geom.Cylinders.QuadPart * geom.TracksPerCylinder * geom.SectorsPerTrack * geom.BytesPerSector;
+ }
+ // SeekToBegin();
+ #endif
+ }
+}
+
+// ((desiredAccess & (FILE_WRITE_DATA | FILE_APPEND_DATA | GENERIC_WRITE)) == 0 &&
+
+#define MY_DEVICE_EXTRA_CODE \
+ IsDeviceFile = IsDeviceName(fileName); \
+ GetDeviceLength();
+#else
+#define MY_DEVICE_EXTRA_CODE
+#endif
+
+bool CInFile::Open(LPCTSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
+{
+ bool res = Create(fileName, GENERIC_READ, shareMode, creationDisposition, flagsAndAttributes);
+ MY_DEVICE_EXTRA_CODE
+ return res;
+}
+
+bool CInFile::OpenShared(LPCTSTR fileName, bool shareForWrite)
+{ return Open(fileName, FILE_SHARE_READ | (shareForWrite ? FILE_SHARE_WRITE : 0), OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL); }
+
+bool CInFile::Open(LPCTSTR fileName)
+ { return OpenShared(fileName, false); }
+
+#ifndef _UNICODE
+bool CInFile::Open(LPCWSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
+{
+ bool res = Create(fileName, GENERIC_READ, shareMode, creationDisposition, flagsAndAttributes);
+ MY_DEVICE_EXTRA_CODE
+ return res;
+}
+
+bool CInFile::OpenShared(LPCWSTR fileName, bool shareForWrite)
+{ return Open(fileName, FILE_SHARE_READ | (shareForWrite ? FILE_SHARE_WRITE : 0), OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL); }
+
+bool CInFile::Open(LPCWSTR fileName)
+ { return OpenShared(fileName, false); }
+#endif
+
+// ReadFile and WriteFile functions in Windows have BUG:
+// If you Read or Write 64MB or more (probably min_failure_size = 64MB - 32KB + 1)
+// from/to Network file, it returns ERROR_NO_SYSTEM_RESOURCES
+// (Insufficient system resources exist to complete the requested service).
+
+// Probably in some version of Windows there are problems with other sizes:
+// for 32 MB (maybe also for 16 MB).
+// And message can be "Network connection was lost"
+
+static UInt32 kChunkSizeMax = (1 << 22);
+
+bool CInFile::Read1(void *data, UInt32 size, UInt32 &processedSize)
+{
+ DWORD processedLoc = 0;
+ bool res = BOOLToBool(::ReadFile(_handle, data, size, &processedLoc, NULL));
+ processedSize = (UInt32)processedLoc;
+ return res;
+}
+
+bool CInFile::ReadPart(void *data, UInt32 size, UInt32 &processedSize)
+{
+ if (size > kChunkSizeMax)
+ size = kChunkSizeMax;
+ return Read1(data, size, processedSize);
+}
+
+bool CInFile::Read(void *data, UInt32 size, UInt32 &processedSize)
+{
+ processedSize = 0;
+ do
+ {
+ UInt32 processedLoc = 0;
+ bool res = ReadPart(data, size, processedLoc);
+ processedSize += processedLoc;
+ if (!res)
+ return false;
+ if (processedLoc == 0)
+ return true;
+ data = (void *)((unsigned char *)data + processedLoc);
+ size -= processedLoc;
+ }
+ while (size > 0);
+ return true;
+}
+
+/////////////////////////
+// COutFile
+
+bool COutFile::Open(LPCTSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
+ { return CFileBase::Create(fileName, GENERIC_WRITE, shareMode, creationDisposition, flagsAndAttributes); }
+
+static inline DWORD GetCreationDisposition(bool createAlways)
+ { return createAlways? CREATE_ALWAYS: CREATE_NEW; }
+
+bool COutFile::Open(LPCTSTR fileName, DWORD creationDisposition)
+ { return Open(fileName, FILE_SHARE_READ, creationDisposition, FILE_ATTRIBUTE_NORMAL); }
+
+bool COutFile::Create(LPCTSTR fileName, bool createAlways)
+ { return Open(fileName, GetCreationDisposition(createAlways)); }
+
+#ifndef _UNICODE
+
+bool COutFile::Open(LPCWSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
+ { return CFileBase::Create(fileName, GENERIC_WRITE, shareMode, creationDisposition, flagsAndAttributes); }
+
+bool COutFile::Open(LPCWSTR fileName, DWORD creationDisposition)
+ { return Open(fileName, FILE_SHARE_READ, creationDisposition, FILE_ATTRIBUTE_NORMAL); }
+
+bool COutFile::Create(LPCWSTR fileName, bool createAlways)
+ { return Open(fileName, GetCreationDisposition(createAlways)); }
+
+#endif
+
+bool COutFile::SetTime(const FILETIME *cTime, const FILETIME *aTime, const FILETIME *mTime)
+ { return BOOLToBool(::SetFileTime(_handle, cTime, aTime, mTime)); }
+
+bool COutFile::SetMTime(const FILETIME *mTime) { return SetTime(NULL, NULL, mTime); }
+
+bool COutFile::WritePart(const void *data, UInt32 size, UInt32 &processedSize)
+{
+ if (size > kChunkSizeMax)
+ size = kChunkSizeMax;
+ DWORD processedLoc = 0;
+ bool res = BOOLToBool(::WriteFile(_handle, data, size, &processedLoc, NULL));
+ processedSize = (UInt32)processedLoc;
+ return res;
+}
+
+bool COutFile::Write(const void *data, UInt32 size, UInt32 &processedSize)
+{
+ processedSize = 0;
+ do
+ {
+ UInt32 processedLoc = 0;
+ bool res = WritePart(data, size, processedLoc);
+ processedSize += processedLoc;
+ if (!res)
+ return false;
+ if (processedLoc == 0)
+ return true;
+ data = (const void *)((const unsigned char *)data + processedLoc);
+ size -= processedLoc;
+ }
+ while (size > 0);
+ return true;
+}
+
+bool COutFile::SetEndOfFile() { return BOOLToBool(::SetEndOfFile(_handle)); }
+
+bool COutFile::SetLength(UInt64 length)
+{
+ UInt64 newPosition;
+ if (!Seek(length, newPosition))
+ return false;
+ if (newPosition != length)
+ return false;
+ return SetEndOfFile();
+}
+
+}}}