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//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
// TODO-Cleanup: this class is unused
//----------------------------------------------------------
// FileCache.h - very simple read ahead/ReadFile abstraction
//----------------------------------------------------------
#ifndef _FileCache
#define _FileCache
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#define CACHE_THIS_FILE 0xFF
class FileCache
{
public:
static HANDLE CreateFileA(_In_ LPCSTR lpFileName,
_In_ DWORD dwDesiredAccess,
_In_ DWORD dwShareMode,
_In_opt_ LPSECURITY_ATTRIBUTES lpSecurityAttributes,
_In_ DWORD dwCreationDisposition,
_In_ DWORD dwFlagsAndAttributes,
_In_opt_ HANDLE hTemplateFile);
static HANDLE CreateFileW(_In_ LPCWSTR lpFileName,
_In_ DWORD dwDesiredAccess,
_In_ DWORD dwShareMode,
_In_opt_ LPSECURITY_ATTRIBUTES lpSecurityAttributes,
_In_ DWORD dwCreationDisposition,
_In_ DWORD dwFlagsAndAttributes,
_In_opt_ HANDLE hTemplateFile);
static BOOL ReadFile(_In_ HANDLE hFile,
_Out_writes_bytes_to_opt_(nNumberOfBytesToRead, *lpNumberOfBytesRead) __out_data_source(FILE)
LPVOID lpBuffer,
_In_ DWORD nNumberOfBytesToRead,
_Out_opt_ LPDWORD lpNumberOfBytesRead,
_Inout_opt_ LPOVERLAPPED lpOverlapped);
static BOOL WriteFile(_In_ HANDLE hFile,
_In_reads_bytes_opt_(nNumberOfBytesToWrite) LPCVOID lpBuffer,
_In_ DWORD nNumberOfBytesToWrite,
_Out_opt_ LPDWORD lpNumberOfBytesWritten,
_Inout_opt_ LPOVERLAPPED lpOverlapped);
static BOOL CloseHandle(_In_ HANDLE hObject);
static __int64 GetFilePos(HANDLE hFile);
private:
static HANDLE cachedHandle;
static bool openAsCache;
static BYTE* rawBuff;
static unsigned int offset;
static unsigned int length;
static __int64 fileoffset;
};
#endif
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