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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_EXTENSION_H_
#define CORE_FXCRT_EXTENSION_H_
#include <algorithm>
#include <memory>
#include "core/fxcrt/fx_basic.h"
#include "core/fxcrt/fx_safe_types.h"
class IFXCRT_FileAccess {
public:
static IFXCRT_FileAccess* Create();
virtual ~IFXCRT_FileAccess() {}
virtual bool Open(const CFX_ByteStringC& fileName, uint32_t dwMode) = 0;
virtual bool Open(const CFX_WideStringC& fileName, uint32_t dwMode) = 0;
virtual void Close() = 0;
virtual FX_FILESIZE GetSize() const = 0;
virtual FX_FILESIZE GetPosition() const = 0;
virtual FX_FILESIZE SetPosition(FX_FILESIZE pos) = 0;
virtual size_t Read(void* pBuffer, size_t szBuffer) = 0;
virtual size_t Write(const void* pBuffer, size_t szBuffer) = 0;
virtual size_t ReadPos(void* pBuffer, size_t szBuffer, FX_FILESIZE pos) = 0;
virtual size_t WritePos(const void* pBuffer,
size_t szBuffer,
FX_FILESIZE pos) = 0;
virtual bool Flush() = 0;
virtual bool Truncate(FX_FILESIZE szFile) = 0;
};
#ifdef PDF_ENABLE_XFA
class CFX_CRTFileAccess : public IFX_FileAccess {
public:
CFX_CRTFileAccess();
~CFX_CRTFileAccess() override;
// IFX_FileAccess
void Release() override;
IFX_FileAccess* Retain() override;
void GetPath(CFX_WideString& wsPath) override;
IFX_SeekableStream* CreateFileStream(uint32_t dwModes) override;
bool Init(const CFX_WideStringC& wsPath);
protected:
CFX_WideString m_path;
uint32_t m_RefCount;
};
#endif // PDF_ENABLE_XFA
class CFX_CRTFileStream final : public IFX_SeekableStream {
public:
explicit CFX_CRTFileStream(std::unique_ptr<IFXCRT_FileAccess> pFA);
~CFX_CRTFileStream() override;
// IFX_SeekableStream:
IFX_SeekableStream* Retain() override;
void Release() override;
FX_FILESIZE GetSize() override;
bool IsEOF() override;
FX_FILESIZE GetPosition() override;
bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
size_t ReadBlock(void* buffer, size_t size) override;
bool WriteBlock(const void* buffer, FX_FILESIZE offset, size_t size) override;
bool Flush() override;
protected:
std::unique_ptr<IFXCRT_FileAccess> m_pFile;
uint32_t m_dwCount;
};
#define FX_MEMSTREAM_BlockSize (64 * 1024)
#define FX_MEMSTREAM_Consecutive 0x01
#define FX_MEMSTREAM_TakeOver 0x02
class CFX_MemoryStream final : public IFX_MemoryStream {
public:
explicit CFX_MemoryStream(bool bConsecutive);
CFX_MemoryStream(uint8_t* pBuffer, size_t nSize, bool bTakeOver);
~CFX_MemoryStream() override;
// IFX_MemoryStream
IFX_SeekableStream* Retain() override;
void Release() override;
FX_FILESIZE GetSize() override;
bool IsEOF() override;
FX_FILESIZE GetPosition() override;
bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
size_t ReadBlock(void* buffer, size_t size) override;
bool WriteBlock(const void* buffer, FX_FILESIZE offset, size_t size) override;
bool Flush() override;
bool IsConsecutive() const override;
void EstimateSize(size_t nInitSize, size_t nGrowSize) override;
uint8_t* GetBuffer() const override;
void AttachBuffer(uint8_t* pBuffer,
size_t nSize,
bool bTakeOver = false) override;
void DetachBuffer() override;
protected:
CFX_ArrayTemplate<uint8_t*> m_Blocks;
uint32_t m_dwCount;
size_t m_nTotalSize;
size_t m_nCurSize;
size_t m_nCurPos;
size_t m_nGrowSize;
uint32_t m_dwFlags;
bool ExpandBlocks(size_t size);
};
#ifdef __cplusplus
extern "C" {
#endif
#define MT_N 848
#define MT_M 456
#define MT_Matrix_A 0x9908b0df
#define MT_Upper_Mask 0x80000000
#define MT_Lower_Mask 0x7fffffff
struct FX_MTRANDOMCONTEXT {
FX_MTRANDOMCONTEXT() {
mti = MT_N + 1;
bHaveSeed = false;
}
uint32_t mti;
bool bHaveSeed;
uint32_t mt[MT_N];
};
#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
bool FX_GenerateCryptoRandom(uint32_t* pBuffer, int32_t iCount);
#endif
#ifdef __cplusplus
}
#endif
#endif // CORE_FXCRT_EXTENSION_H_
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