/
FileProjection.cpp
146 lines (120 loc) · 3.22 KB
/
FileProjection.cpp
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#include "FileProjection.h"
namespace ds_mmap
{
CFileProjection::CFileProjection(void)
: m_hMapping(NULL)
, m_hFile(INVALID_HANDLE_VALUE)
, m_pData(nullptr)
, m_isPlainData(false)
, m_hctx(INVALID_HANDLE_VALUE)
{
}
CFileProjection::CFileProjection( const std::wstring& path )
: CFileProjection()
{
Project(path);
}
CFileProjection::~CFileProjection(void)
{
Release();
}
/*
Open file as memory-mapped PE image
IN:
path - file path
RETURN:
Address of file mapping
*/
void* CFileProjection::Project( const std::wstring& path )
{
Release();
ACTCTX act = {0};
act.cbSize = sizeof(act);
act.dwFlags = ACTCTX_FLAG_RESOURCE_NAME_VALID;
act.lpSource = path.c_str();
act.lpResourceName = MAKEINTRESOURCE(2);
m_hctx = CreateActCtx(&act);
if(m_hctx == INVALID_HANDLE_VALUE)
{
act.lpResourceName = MAKEINTRESOURCE(1);
m_hctx = CreateActCtx(&act);
}
m_hFile = CreateFile(path.c_str(), FILE_GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, 0, NULL);
if(m_hFile != INVALID_HANDLE_VALUE)
{
// Try mapping as image
m_hMapping = CreateFileMapping(m_hFile, NULL, SEC_IMAGE | PAGE_READONLY, 0, 0, NULL);
if(m_hMapping && m_hMapping != INVALID_HANDLE_VALUE)
{
m_pData = MapViewOfFile(m_hMapping, FILE_MAP_READ, 0, 0, 0);
}
// Map as simple datafile
else
{
m_isPlainData = true;
m_hMapping = CreateFileMapping(m_hFile, NULL, PAGE_READONLY, 0, 0, NULL);
if(m_hMapping && m_hMapping != INVALID_HANDLE_VALUE)
m_pData = MapViewOfFile(m_hMapping, FILE_MAP_READ, 0, 0, 0);
}
}
return m_pData;
}
/*
Release mapping, if any
*/
void CFileProjection::Release()
{
if(m_hctx != INVALID_HANDLE_VALUE)
{
ReleaseActCtx(m_hctx);
m_hctx = INVALID_HANDLE_VALUE;
}
if(m_pData)
{
UnmapViewOfFile(m_pData);
m_pData = nullptr;
}
if(m_hMapping && m_hMapping != INVALID_HANDLE_VALUE)
{
CloseHandle(m_hMapping);
m_hMapping = NULL;
}
if(m_hFile != INVALID_HANDLE_VALUE)
{
CloseHandle(m_hFile);
m_hFile = INVALID_HANDLE_VALUE;
}
}
/*
Get mapping base
RETURN:
Address of file mapping
*/
void* CFileProjection::base() const
{
return m_pData;
}
/*
Get activation context
*/
HANDLE CFileProjection::actx() const
{
return m_hctx;
}
/*
Get mapping base
RETURN:
Address of file mapping
*/
CFileProjection::operator void*() const
{
return m_pData;
}
/*
Is plain datafile
*/
bool CFileProjection::isPlainData() const
{
return m_isPlainData;
}
};