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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"
#if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
struct CFindFileDataA;
typedef CFindFileDataA FX_FileHandle;
#else // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
#include <dirent.h>
#include <sys/types.h>
typedef DIR FX_FileHandle;
#endif // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
FX_FileHandle* FX_OpenFolder(const char* path);
bool FX_GetNextFile(FX_FileHandle* handle, ByteString* filename, bool* bFolder);
void FX_CloseFolder(FX_FileHandle* handle);
#define FX_FILEMODE_ReadOnly 1
#define FX_FILEMODE_Truncate 2
class IFX_WriteStream : virtual public Retainable {
public:
virtual bool WriteBlock(const void* pData, size_t size) = 0;
virtual bool WriteString(const ByteStringView& str) = 0;
};
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_ReadStream : virtual public Retainable {
public:
virtual bool IsEOF() = 0;
virtual FX_FILESIZE GetPosition() = 0;
virtual size_t ReadBlock(void* buffer, size_t size) = 0;
};
class IFX_SeekableWriteStream : public IFX_WriteStream {
public:
// IFX_WriteStream:
bool WriteBlock(const void* pData, size_t size) override;
virtual FX_FILESIZE GetSize() = 0;
virtual bool Flush() = 0;
virtual bool WriteBlock(const void* pData,
FX_FILESIZE offset,
size_t size) = 0;
};
class IFX_SeekableReadStream : public IFX_ReadStream {
public:
static RetainPtr<IFX_SeekableReadStream> CreateFromFilename(
const char* filename);
// IFX_ReadStream:
bool IsEOF() override;
FX_FILESIZE GetPosition() override;
size_t ReadBlock(void* buffer, size_t size) override;
virtual bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) = 0;
virtual FX_FILESIZE GetSize() = 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_SeekableReadStream:
bool IsEOF() override = 0;
FX_FILESIZE GetPosition() override = 0;
size_t ReadBlock(void* buffer, size_t size) override = 0;
bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override = 0;
FX_FILESIZE GetSize() override = 0;
// IFX_SeekableWriteStream:
bool WriteBlock(const void* buffer,
FX_FILESIZE offset,
size_t size) override = 0;
bool WriteBlock(const void* buffer, size_t size) override;
bool WriteString(const ByteStringView& str) override;
bool Flush() override = 0;
};
#endif // CORE_FXCRT_FX_STREAM_H_
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