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// Copyright 2016 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/fpdfapi/fpdf_parser/include/cpdf_stream.h"
#include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
#include "core/fpdfapi/fpdf_parser/include/cpdf_stream_acc.h"
#include "core/fpdfapi/fpdf_parser/include/fpdf_parser_decode.h"
#include "third_party/base/stl_util.h"
CPDF_Stream::CPDF_Stream(uint8_t* pData, uint32_t size, CPDF_Dictionary* pDict)
: m_pDict(pDict),
m_dwSize(size),
m_GenNum(kMemoryBasedGenNum),
m_pDataBuf(pData) {}
CPDF_Stream::~CPDF_Stream() {
m_ObjNum = kInvalidObjNum;
if (IsMemoryBased())
FX_Free(m_pDataBuf);
if (m_pDict)
m_pDict->Release();
}
CPDF_Object::Type CPDF_Stream::GetType() const {
return STREAM;
}
CPDF_Dictionary* CPDF_Stream::GetDict() const {
return m_pDict;
}
bool CPDF_Stream::IsStream() const {
return true;
}
CPDF_Stream* CPDF_Stream::AsStream() {
return this;
}
const CPDF_Stream* CPDF_Stream::AsStream() const {
return this;
}
void CPDF_Stream::InitStreamInternal(CPDF_Dictionary* pDict) {
if (pDict) {
if (m_pDict)
m_pDict->Release();
m_pDict = pDict;
}
if (IsMemoryBased())
FX_Free(m_pDataBuf);
m_GenNum = 0;
m_pFile = nullptr;
}
void CPDF_Stream::InitStream(const uint8_t* pData,
uint32_t size,
CPDF_Dictionary* pDict) {
InitStreamInternal(pDict);
m_GenNum = kMemoryBasedGenNum;
m_pDataBuf = FX_Alloc(uint8_t, size);
if (pData)
FXSYS_memcpy(m_pDataBuf, pData, size);
m_dwSize = size;
if (m_pDict)
m_pDict->SetIntegerFor("Length", size);
}
CPDF_Object* CPDF_Stream::Clone() const {
return CloneObjectNonCyclic(false);
}
CPDF_Object* CPDF_Stream::CloneNonCyclic(
bool bDirect,
std::set<const CPDF_Object*>* pVisited) const {
pVisited->insert(this);
CPDF_StreamAcc acc;
acc.LoadAllData(this, TRUE);
uint32_t streamSize = acc.GetSize();
CPDF_Dictionary* pDict = GetDict();
if (pDict && !pdfium::ContainsKey(*pVisited, pDict)) {
pDict = ToDictionary(
static_cast<CPDF_Object*>(pDict)->CloneNonCyclic(bDirect, pVisited));
}
return new CPDF_Stream(acc.DetachData(), streamSize, pDict);
}
void CPDF_Stream::SetData(const uint8_t* pData,
uint32_t size,
FX_BOOL bCompressed,
FX_BOOL bKeepBuf) {
if (IsMemoryBased())
FX_Free(m_pDataBuf);
m_GenNum = kMemoryBasedGenNum;
if (bKeepBuf) {
m_pDataBuf = const_cast<uint8_t*>(pData);
} else {
m_pDataBuf = FX_Alloc(uint8_t, size);
if (pData) {
FXSYS_memcpy(m_pDataBuf, pData, size);
}
}
m_dwSize = size;
if (!m_pDict)
m_pDict = new CPDF_Dictionary;
m_pDict->SetIntegerFor("Length", size);
if (!bCompressed) {
m_pDict->RemoveFor("Filter");
m_pDict->RemoveFor("DecodeParms");
}
}
FX_BOOL CPDF_Stream::ReadRawData(FX_FILESIZE offset,
uint8_t* buf,
uint32_t size) const {
if (!IsMemoryBased() && m_pFile)
return m_pFile->ReadBlock(buf, offset, size);
if (m_pDataBuf)
FXSYS_memcpy(buf, m_pDataBuf + offset, size);
return TRUE;
}
void CPDF_Stream::InitStreamFromFile(IFX_FileRead* pFile,
CPDF_Dictionary* pDict) {
InitStreamInternal(pDict);
m_pFile = pFile;
m_dwSize = (uint32_t)pFile->GetSize();
if (m_pDict)
m_pDict->SetIntegerFor("Length", m_dwSize);
}
CFX_WideString CPDF_Stream::GetUnicodeText() const {
CPDF_StreamAcc stream;
stream.LoadAllData(this, FALSE);
return PDF_DecodeText(stream.GetData(), stream.GetSize());
}
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