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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
#ifndef CORE_FXCRT_FX_STREAM_H_
#define CORE_FXCRT_FX_STREAM_H_
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/fx_system.h"
#include "core/fxcrt/retain_ptr.h"
#include "third_party/base/compiler_specific.h"
struct FX_FolderHandle;
FX_FolderHandle* FX_OpenFolder(const char* path);
bool FX_GetNextFile(FX_FolderHandle* handle,
ByteString* filename,
bool* bFolder);
void FX_CloseFolder(FX_FolderHandle* handle);
// Used with std::unique_ptr to automatically call FX_CloseFolder().
struct FxFolderHandleCloser {
inline void operator()(FX_FolderHandle* h) const { FX_CloseFolder(h); }
};
#define FX_FILEMODE_ReadOnly 1
#define FX_FILEMODE_Truncate 2
class IFX_WriteStream {
public:
virtual bool WriteBlock(const void* pData, size_t size) = 0;
virtual bool WriteString(ByteStringView str) = 0;
protected:
virtual ~IFX_WriteStream() = default;
};
class IFX_ArchiveStream : public IFX_WriteStream {
public:
virtual bool WriteByte(uint8_t byte) = 0;
virtual bool WriteDWord(uint32_t i) = 0;
virtual FX_FILESIZE CurrentOffset() const = 0;
};
class IFX_StreamWithSize {
public:
virtual FX_FILESIZE GetSize() = 0;
};
class IFX_RetainableWriteStream : virtual public Retainable,
public IFX_WriteStream {};
class IFX_SeekableWriteStream : virtual public IFX_StreamWithSize,
public IFX_RetainableWriteStream {
public:
// IFX_WriteStream:
bool WriteBlock(const void* pData, size_t size) override;
virtual bool Flush() = 0;
virtual bool WriteBlockAtOffset(const void* pData,
FX_FILESIZE offset,
size_t size) = 0;
};
class IFX_SeekableReadStream : virtual public Retainable,
virtual public IFX_StreamWithSize {
public:
static RetainPtr<IFX_SeekableReadStream> CreateFromFilename(
const char* filename);
virtual bool IsEOF();
virtual FX_FILESIZE GetPosition();
virtual size_t ReadBlock(void* buffer, size_t size);
virtual bool ReadBlockAtOffset(void* buffer,
FX_FILESIZE offset,
size_t size) WARN_UNUSED_RESULT = 0;
};
class IFX_SeekableStream : public IFX_SeekableReadStream,
public IFX_SeekableWriteStream {
public:
static RetainPtr<IFX_SeekableStream> CreateFromFilename(const char* filename,
uint32_t dwModes);
static RetainPtr<IFX_SeekableStream> CreateFromFilename(
const wchar_t* filename,
uint32_t dwModes);
// IFX_SeekableWriteStream:
bool WriteBlock(const void* buffer, size_t size) override;
bool WriteString(ByteStringView str) override;
};
#endif // CORE_FXCRT_FX_STREAM_H_
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