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// Copyright 2017 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/fx_stream.h"
#include <algorithm>
#include <memory>
#include <utility>
#include <vector>
#include "core/fxcrt/fileaccess_iface.h"
#include "core/fxcrt/fx_safe_types.h"
#include "third_party/base/ptr_util.h"
namespace {
class CFX_CRTFileStream final : public IFX_SeekableStream {
public:
template <typename T, typename... Args>
friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
// IFX_SeekableStream:
FX_FILESIZE GetSize() override { return m_pFile->GetSize(); }
bool IsEOF() override { return GetPosition() >= GetSize(); }
FX_FILESIZE GetPosition() override { return m_pFile->GetPosition(); }
bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {
return m_pFile->ReadPos(buffer, size, offset) > 0;
}
size_t ReadBlock(void* buffer, size_t size) override {
return m_pFile->Read(buffer, size);
}
bool WriteBlock(const void* buffer,
FX_FILESIZE offset,
size_t size) override {
return !!m_pFile->WritePos(buffer, size, offset);
}
bool Flush() override { return m_pFile->Flush(); }
private:
explicit CFX_CRTFileStream(std::unique_ptr<FileAccessIface> pFA)
: m_pFile(std::move(pFA)) {}
~CFX_CRTFileStream() override {}
std::unique_ptr<FileAccessIface> m_pFile;
};
} // namespace
// static
RetainPtr<IFX_SeekableStream> IFX_SeekableStream::CreateFromFilename(
const char* filename,
uint32_t dwModes) {
std::unique_ptr<FileAccessIface> pFA = FileAccessIface::Create();
if (!pFA->Open(filename, dwModes))
return nullptr;
return pdfium::MakeRetain<CFX_CRTFileStream>(std::move(pFA));
}
// static
RetainPtr<IFX_SeekableStream> IFX_SeekableStream::CreateFromFilename(
const wchar_t* filename,
uint32_t dwModes) {
std::unique_ptr<FileAccessIface> pFA = FileAccessIface::Create();
if (!pFA->Open(filename, dwModes))
return nullptr;
return pdfium::MakeRetain<CFX_CRTFileStream>(std::move(pFA));
}
// static
RetainPtr<IFX_SeekableReadStream> IFX_SeekableReadStream::CreateFromFilename(
const char* filename) {
return IFX_SeekableStream::CreateFromFilename(filename, FX_FILEMODE_ReadOnly);
}
bool IFX_SeekableWriteStream::WriteBlock(const void* pData, size_t size) {
return WriteBlock(pData, GetSize(), size);
}
bool IFX_SeekableReadStream::IsEOF() {
return false;
}
FX_FILESIZE IFX_SeekableReadStream::GetPosition() {
return 0;
}
size_t IFX_SeekableReadStream::ReadBlock(void* buffer, size_t size) {
return 0;
}
bool IFX_SeekableStream::WriteBlock(const void* buffer, size_t size) {
return WriteBlock(buffer, GetSize(), size);
}
bool IFX_SeekableStream::WriteString(const ByteStringView& str) {
return WriteBlock(str.unterminated_c_str(), str.GetLength());
}
FX_FileHandle* FX_OpenFolder(const char* path) {
#if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
auto pData = pdfium::MakeUnique<CFindFileDataA>();
pData->m_Handle =
FindFirstFileExA((ByteString(path) + "/*.*").c_str(), FindExInfoStandard,
&pData->m_FindData, FindExSearchNameMatch, nullptr, 0);
if (pData->m_Handle == INVALID_HANDLE_VALUE)
return nullptr;
pData->m_bEnd = false;
return pData.release();
#else
return opendir(path);
#endif
}
bool FX_GetNextFile(FX_FileHandle* handle,
ByteString* filename,
bool* bFolder) {
if (!handle)
return false;
#if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
if (handle->m_bEnd)
return false;
*filename = handle->m_FindData.cFileName;
*bFolder =
(handle->m_FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
if (!FindNextFileA(handle->m_Handle, &handle->m_FindData))
handle->m_bEnd = true;
return true;
#else
struct dirent* de = readdir(handle);
if (!de)
return false;
*filename = de->d_name;
*bFolder = de->d_type == DT_DIR;
return true;
#endif
}
void FX_CloseFolder(FX_FileHandle* handle) {
if (!handle)
return;
#if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
FindClose(handle->m_Handle);
delete handle;
#else
closedir(handle);
#endif
}
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