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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fxcrt/fxcrt_windows.h"
#include "core/fxcrt/fx_string.h"
#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
// static
IFXCRT_FileAccess* IFXCRT_FileAccess::Create() {
return new CFXCRT_FileAccess_Win64;
}
void FXCRT_Windows_GetFileMode(uint32_t dwMode,
uint32_t& dwAccess,
uint32_t& dwShare,
uint32_t& dwCreation) {
dwAccess = GENERIC_READ;
dwShare = FILE_SHARE_READ | FILE_SHARE_WRITE;
if (!(dwMode & FX_FILEMODE_ReadOnly)) {
dwAccess |= GENERIC_WRITE;
dwCreation = (dwMode & FX_FILEMODE_Truncate) ? CREATE_ALWAYS : OPEN_ALWAYS;
} else {
dwCreation = OPEN_EXISTING;
}
}
#ifdef __cplusplus
extern "C" {
#endif
WINBASEAPI BOOL WINAPI GetFileSizeEx(HANDLE hFile, PLARGE_INTEGER lpFileSize);
WINBASEAPI BOOL WINAPI SetFilePointerEx(HANDLE hFile,
LARGE_INTEGER liDistanceToMove,
PLARGE_INTEGER lpNewFilePointer,
DWORD dwMoveMethod);
#ifdef __cplusplus
}
#endif
CFXCRT_FileAccess_Win64::CFXCRT_FileAccess_Win64() : m_hFile(nullptr) {}
CFXCRT_FileAccess_Win64::~CFXCRT_FileAccess_Win64() {
Close();
}
bool CFXCRT_FileAccess_Win64::Open(const CFX_ByteStringC& fileName,
uint32_t dwMode) {
if (m_hFile)
return FALSE;
uint32_t dwAccess, dwShare, dwCreation;
FXCRT_Windows_GetFileMode(dwMode, dwAccess, dwShare, dwCreation);
m_hFile = ::CreateFileA(fileName.c_str(), dwAccess, dwShare, nullptr,
dwCreation, FILE_ATTRIBUTE_NORMAL, nullptr);
if (m_hFile == INVALID_HANDLE_VALUE)
m_hFile = nullptr;
return !!m_hFile;
}
bool CFXCRT_FileAccess_Win64::Open(const CFX_WideStringC& fileName,
uint32_t dwMode) {
if (m_hFile)
return FALSE;
uint32_t dwAccess, dwShare, dwCreation;
FXCRT_Windows_GetFileMode(dwMode, dwAccess, dwShare, dwCreation);
m_hFile = ::CreateFileW((LPCWSTR)fileName.c_str(), dwAccess, dwShare, nullptr,
dwCreation, FILE_ATTRIBUTE_NORMAL, nullptr);
if (m_hFile == INVALID_HANDLE_VALUE)
m_hFile = nullptr;
return !!m_hFile;
}
void CFXCRT_FileAccess_Win64::Close() {
if (!m_hFile)
return;
::CloseHandle(m_hFile);
m_hFile = nullptr;
}
FX_FILESIZE CFXCRT_FileAccess_Win64::GetSize() const {
if (!m_hFile)
return 0;
LARGE_INTEGER size = {};
if (!::GetFileSizeEx(m_hFile, &size))
return 0;
return (FX_FILESIZE)size.QuadPart;
}
FX_FILESIZE CFXCRT_FileAccess_Win64::GetPosition() const {
if (!m_hFile)
return (FX_FILESIZE)-1;
LARGE_INTEGER dist = {};
LARGE_INTEGER newPos = {};
if (!::SetFilePointerEx(m_hFile, dist, &newPos, FILE_CURRENT))
return (FX_FILESIZE)-1;
return (FX_FILESIZE)newPos.QuadPart;
}
FX_FILESIZE CFXCRT_FileAccess_Win64::SetPosition(FX_FILESIZE pos) {
if (!m_hFile)
return (FX_FILESIZE)-1;
LARGE_INTEGER dist;
dist.QuadPart = pos;
LARGE_INTEGER newPos = {};
if (!::SetFilePointerEx(m_hFile, dist, &newPos, FILE_BEGIN))
return (FX_FILESIZE)-1;
return (FX_FILESIZE)newPos.QuadPart;
}
size_t CFXCRT_FileAccess_Win64::Read(void* pBuffer, size_t szBuffer) {
if (!m_hFile)
return 0;
size_t szRead = 0;
if (!::ReadFile(m_hFile, pBuffer, (DWORD)szBuffer, (LPDWORD)&szRead,
nullptr)) {
return 0;
}
return szRead;
}
size_t CFXCRT_FileAccess_Win64::Write(const void* pBuffer, size_t szBuffer) {
if (!m_hFile)
return 0;
size_t szWrite = 0;
if (!::WriteFile(m_hFile, pBuffer, (DWORD)szBuffer, (LPDWORD)&szWrite,
nullptr)) {
return 0;
}
return szWrite;
}
size_t CFXCRT_FileAccess_Win64::ReadPos(void* pBuffer,
size_t szBuffer,
FX_FILESIZE pos) {
if (!m_hFile)
return 0;
if (pos >= GetSize())
return 0;
if (SetPosition(pos) == (FX_FILESIZE)-1)
return 0;
return Read(pBuffer, szBuffer);
}
size_t CFXCRT_FileAccess_Win64::WritePos(const void* pBuffer,
size_t szBuffer,
FX_FILESIZE pos) {
if (!m_hFile) {
return 0;
}
if (SetPosition(pos) == (FX_FILESIZE)-1) {
return 0;
}
return Write(pBuffer, szBuffer);
}
bool CFXCRT_FileAccess_Win64::Flush() {
if (!m_hFile)
return false;
return !!::FlushFileBuffers(m_hFile);
}
bool CFXCRT_FileAccess_Win64::Truncate(FX_FILESIZE szFile) {
if (SetPosition(szFile) == (FX_FILESIZE)-1)
return false;
return !!::SetEndOfFile(m_hFile);
}
#endif
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