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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_INCLUDE_FXCRT_FX_STREAM_H_
#define CORE_INCLUDE_FXCRT_FX_STREAM_H_
#include "fx_string.h"
void* FX_OpenFolder(const FX_CHAR* path);
void* FX_OpenFolder(const FX_WCHAR* path);
FX_BOOL FX_GetNextFile(void* handle,
CFX_ByteString& filename,
FX_BOOL& bFolder);
FX_BOOL FX_GetNextFile(void* handle,
CFX_WideString& filename,
FX_BOOL& bFolder);
void FX_CloseFolder(void* handle);
FX_WCHAR FX_GetFolderSeparator();
#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
#define FX_FILESIZE int32_t
#else
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif
#define FX_FILESIZE off_t
#endif
#define FX_GETBYTEOFFSET32(a) 0
#define FX_GETBYTEOFFSET40(a) 0
#define FX_GETBYTEOFFSET48(a) 0
#define FX_GETBYTEOFFSET56(a) 0
#define FX_GETBYTEOFFSET24(a) ((uint8_t)(a >> 24))
#define FX_GETBYTEOFFSET16(a) ((uint8_t)(a >> 16))
#define FX_GETBYTEOFFSET8(a) ((uint8_t)(a >> 8))
#define FX_GETBYTEOFFSET0(a) ((uint8_t)(a))
#define FX_FILEMODE_Write 0
#define FX_FILEMODE_ReadOnly 1
#define FX_FILEMODE_Truncate 2
class IFX_StreamWrite {
public:
virtual ~IFX_StreamWrite() {}
virtual void Release() = 0;
virtual FX_BOOL WriteBlock(const void* pData, size_t size) = 0;
};
class IFX_FileWrite : public IFX_StreamWrite {
public:
// IFX_StreamWrite:
FX_BOOL WriteBlock(const void* pData, size_t size) override {
return WriteBlock(pData, GetSize(), size);
}
virtual FX_FILESIZE GetSize() = 0;
virtual FX_BOOL Flush() = 0;
virtual FX_BOOL WriteBlock(const void* pData,
FX_FILESIZE offset,
size_t size) = 0;
};
class IFX_StreamRead {
public:
virtual ~IFX_StreamRead() {}
virtual void Release() = 0;
virtual FX_BOOL IsEOF() = 0;
virtual FX_FILESIZE GetPosition() = 0;
virtual size_t ReadBlock(void* buffer, size_t size) = 0;
};
class IFX_FileRead : IFX_StreamRead {
public:
// IFX_StreamRead:
void Release() override = 0;
FX_BOOL IsEOF() override { return FALSE; }
FX_FILESIZE GetPosition() override { return 0; }
size_t ReadBlock(void* buffer, size_t size) override { return 0; }
virtual FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) = 0;
virtual FX_FILESIZE GetSize() = 0;
};
IFX_FileRead* FX_CreateFileRead(const FX_CHAR* filename);
IFX_FileRead* FX_CreateFileRead(const FX_WCHAR* filename);
class IFX_FileStream : public IFX_FileRead, public IFX_FileWrite {
public:
virtual IFX_FileStream* Retain() = 0;
// IFX_FileRead:
void Release() override = 0;
FX_BOOL IsEOF() override = 0;
FX_FILESIZE GetPosition() override = 0;
size_t ReadBlock(void* buffer, size_t size) override = 0;
FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override = 0;
FX_FILESIZE GetSize() override = 0;
// IFX_FileWrite:
FX_BOOL WriteBlock(const void* buffer,
FX_FILESIZE offset,
size_t size) override = 0;
FX_BOOL WriteBlock(const void* buffer, size_t size) override {
return WriteBlock(buffer, GetSize(), size);
}
FX_BOOL Flush() override = 0;
};
IFX_FileStream* FX_CreateFileStream(const FX_CHAR* filename, FX_DWORD dwModes);
IFX_FileStream* FX_CreateFileStream(const FX_WCHAR* filename, FX_DWORD dwModes);
class IFX_MemoryStream : public IFX_FileStream {
public:
virtual FX_BOOL IsConsecutive() const = 0;
virtual void EstimateSize(size_t nInitSize, size_t nGrowSize) = 0;
virtual uint8_t* GetBuffer() const = 0;
virtual void AttachBuffer(uint8_t* pBuffer,
size_t nSize,
FX_BOOL bTakeOver = FALSE) = 0;
virtual void DetachBuffer() = 0;
};
IFX_MemoryStream* FX_CreateMemoryStream(uint8_t* pBuffer,
size_t nSize,
FX_BOOL bTakeOver = FALSE);
IFX_MemoryStream* FX_CreateMemoryStream(FX_BOOL bConsecutive = FALSE);
class IFX_BufferRead : public IFX_StreamRead {
public:
// IFX_StreamRead:
void Release() override = 0;
FX_BOOL IsEOF() override = 0;
FX_FILESIZE GetPosition() override = 0;
size_t ReadBlock(void* buffer, size_t size) override = 0;
virtual FX_BOOL ReadNextBlock(FX_BOOL bRestart = FALSE) = 0;
virtual const uint8_t* GetBlockBuffer() = 0;
virtual size_t GetBlockSize() = 0;
virtual FX_FILESIZE GetBlockOffset() = 0;
};
#endif // CORE_INCLUDE_FXCRT_FX_STREAM_H_
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