#ifndef CFileMap_classes_H#define CFileMap_classes_H#include <windows.h>#include <stdio.h>#define CFILE_INIT dwSize(0), hFile(INVALID_HANDLE_VALUE), hMap(0), lpMapView(0)void Error(const wchar_t *es);class CFileMap{public: CFileMap(): CFILE_INIT {} CFileMap(LPCTSTR path, bool write=false): CFILE_INIT { Open(path, write); } CFileMap(LPCTSTR path, DWORD size): CFILE_INIT { if(size) Create(path, size); } ~CFileMap() { CloseMap(); } // operator bool(){ return (hFile!=INVALID_HANDLE_VALUE); } void CloseMap(); bool Open(LPCTSTR path, bool write); bool Create(LPCTSTR path, DWORD size); BYTE* Base(){ return reinterpret_cast<BYTE*>(lpMapView); } DWORD Size(){ return dwSize; }protected: DWORD dwSize;private: bool OpenInternal(LPCTSTR path, DWORD dwAccess, DWORD dwCreation, DWORD flProtect, DWORD dwPageAccess, DWORD size=0); HANDLE hFile, hMap; LPVOID lpMapView;}; inline void CFileMap::CloseMap(){ if(hMap) CloseHandle(hMap); hMap=0; if(lpMapView) UnmapViewOfFile(lpMapView); lpMapView=0; if(hFile!=INVALID_HANDLE_VALUE) CloseHandle(hFile); hFile=INVALID_HANDLE_VALUE; dwSize=0;}inline bool CFileMap::OpenInternal(LPCTSTR path, DWORD dwAccess, DWORD dwCreation, DWORD flProtect, DWORD dwPageAccess, DWORD size){ if(hFile!=INVALID_HANDLE_VALUE) CloseMap(); hFile=CreateFile(path, dwAccess, FILE_SHARE_READ, 0, dwCreation, FILE_ATTRIBUTE_NORMAL, 0); if(hFile==INVALID_HANDLE_VALUE) { return false; } if(!size) size=GetFileSize(hFile, 0); hMap=CreateFileMapping( hFile, 0, flProtect , 0, size, 0); if(!hMap) { FILE *f=fopen("log2.txt","wt"); fprintf(f,"ERROR %ld\n",GetLastError()); fclose(f); CloseMap(); return false; } lpMapView=MapViewOfFile(hMap, dwPageAccess, 0, 0, size); if(!lpMapView) { CloseMap(); return false; } dwSize=size; return true;}inline bool CFileMap::Create(LPCTSTR path, DWORD size){ return OpenInternal(path, GENERIC_READ|GENERIC_WRITE, CREATE_ALWAYS, PAGE_READWRITE, FILE_MAP_WRITE, size);}inline bool CFileMap::Open(LPCTSTR path, bool write){ if(write) return OpenInternal(path, GENERIC_READ|GENERIC_WRITE, OPEN_EXISTING, PAGE_READWRITE, FILE_MAP_READ|FILE_MAP_WRITE); else return OpenInternal(path, GENERIC_READ, OPEN_EXISTING, PAGE_READONLY, FILE_MAP_READ);}#endif //CFileMap_classes_H
