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-rw-r--r--xfa/fgas/crt/ifgas_stream.cpp201
1 files changed, 53 insertions, 148 deletions
diff --git a/xfa/fgas/crt/ifgas_stream.cpp b/xfa/fgas/crt/ifgas_stream.cpp
index 534780c0ea..54fca1a721 100644
--- a/xfa/fgas/crt/ifgas_stream.cpp
+++ b/xfa/fgas/crt/ifgas_stream.cpp
@@ -13,6 +13,7 @@
#include <algorithm>
#include <memory>
+#include <utility>
#include "third_party/base/ptr_util.h"
#include "xfa/fgas/crt/fgas_codepage.h"
@@ -125,24 +126,11 @@ class CFGAS_FileWriteStreamImp : public IFGAS_StreamImp {
int32_t m_iPosition;
};
-enum FX_STREAMTYPE {
- FX_SREAMTYPE_Unknown = 0,
- FX_STREAMTYPE_File,
- FX_STREAMTYPE_Buffer,
- FX_STREAMTYPE_Stream,
- FX_STREAMTYPE_BufferRead,
-};
-
class CFGAS_Stream : public IFGAS_Stream {
public:
template <typename T, typename... Args>
friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args);
- bool LoadBuffer(uint8_t* pData, int32_t iTotalSize);
- bool LoadFileRead(const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead);
- bool LoadFileWrite(const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite,
- uint32_t dwAccess);
-
// IFGAS_Stream
uint32_t GetAccessModes() const override;
int32_t GetLength() const override;
@@ -160,11 +148,10 @@ class CFGAS_Stream : public IFGAS_Stream {
uint16_t SetCodePage(uint16_t wCodePage) override;
protected:
- CFGAS_Stream();
+ CFGAS_Stream(std::unique_ptr<IFGAS_StreamImp> imp, uint32_t dwAccess);
~CFGAS_Stream() override;
- FX_STREAMTYPE m_eStreamType;
- IFGAS_StreamImp* m_pStreamImp;
+ std::unique_ptr<IFGAS_StreamImp> m_pStreamImp;
uint32_t m_dwAccess;
int32_t m_iTotalSize;
int32_t m_iPosition;
@@ -626,137 +613,44 @@ int32_t CFGAS_TextStream::WriteString(const wchar_t* pStr, int32_t iLength) {
return iLength;
}
-CFGAS_Stream::CFGAS_Stream()
- : m_eStreamType(FX_SREAMTYPE_Unknown),
- m_pStreamImp(nullptr),
- m_dwAccess(0),
+CFGAS_Stream::CFGAS_Stream(std::unique_ptr<IFGAS_StreamImp> imp,
+ uint32_t dwAccess)
+ : m_pStreamImp(std::move(imp)),
+ m_dwAccess(dwAccess),
m_iTotalSize(0),
m_iPosition(0),
m_iStart(0),
- m_iLength(0),
+ m_iLength(m_pStreamImp->GetLength()),
m_iRefCount(1) {}
-CFGAS_Stream::~CFGAS_Stream() {
- if (m_eStreamType != FX_STREAMTYPE_Stream)
- delete m_pStreamImp;
-}
-
-bool CFGAS_Stream::LoadFileRead(
- const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead) {
- if (m_eStreamType != FX_SREAMTYPE_Unknown || m_pStreamImp)
- return false;
-
- if (!pFileRead)
- return false;
-
- auto pImp = pdfium::MakeUnique<CFGAS_FileReadStreamImp>();
- if (!pImp->LoadFileRead(pFileRead))
- return false;
-
- m_pStreamImp = pImp.release();
- m_eStreamType = FX_STREAMTYPE_File;
- m_dwAccess = 0;
- m_iLength = m_pStreamImp->GetLength();
- return true;
-}
-
-bool CFGAS_Stream::LoadFileWrite(
- const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite,
- uint32_t dwAccess) {
- if (m_eStreamType != FX_SREAMTYPE_Unknown || m_pStreamImp)
- return false;
-
- if (!pFileWrite)
- return false;
-
- auto pImp = pdfium::MakeUnique<CFGAS_FileWriteStreamImp>();
- if (!pImp->LoadFileWrite(pFileWrite, dwAccess))
- return false;
-
- m_pStreamImp = pImp.release();
- m_eStreamType = FX_STREAMTYPE_File;
- m_dwAccess = dwAccess;
- m_iLength = m_pStreamImp->GetLength();
- return true;
-}
-
-bool CFGAS_Stream::LoadBuffer(uint8_t* pData, int32_t iTotalSize) {
- if (m_eStreamType != FX_SREAMTYPE_Unknown || m_pStreamImp)
- return false;
-
- if (!pData || iTotalSize < 1)
- return false;
-
- auto pImp = pdfium::MakeUnique<CFGAS_BufferStreamImp>();
- if (!pImp->LoadBuffer(pData, iTotalSize))
- return false;
-
- m_pStreamImp = pImp.release();
- m_eStreamType = FX_STREAMTYPE_Buffer;
- m_dwAccess = 0;
- m_iLength = m_pStreamImp->GetLength();
- return true;
-}
+CFGAS_Stream::~CFGAS_Stream() {}
uint32_t CFGAS_Stream::GetAccessModes() const {
return m_dwAccess;
}
int32_t CFGAS_Stream::GetLength() const {
- if (!m_pStreamImp) {
- return -1;
- }
- if (m_eStreamType == FX_STREAMTYPE_File ||
- m_eStreamType == FX_STREAMTYPE_Buffer) {
- return m_pStreamImp->GetLength();
- }
- return m_iLength;
+ return m_pStreamImp ? m_pStreamImp->GetLength() : -1;
}
+
int32_t CFGAS_Stream::Seek(FX_STREAMSEEK eSeek, int32_t iOffset) {
- if (!m_pStreamImp) {
+ if (!m_pStreamImp)
return -1;
- }
- if (m_eStreamType == FX_STREAMTYPE_File ||
- m_eStreamType == FX_STREAMTYPE_Buffer) {
- return m_iPosition = m_pStreamImp->Seek(eSeek, iOffset);
- }
- int32_t iEnd = m_iStart + m_iLength;
- int32_t iPosition = m_iStart + iOffset;
- if (eSeek == FX_STREAMSEEK_Begin) {
- m_iPosition = iPosition;
- } else if (eSeek == FX_STREAMSEEK_Current) {
- m_iPosition += iOffset;
- } else if (eSeek == FX_STREAMSEEK_End) {
- m_iPosition = iEnd + iOffset;
- }
- if (m_iPosition > iEnd) {
- m_iPosition = iEnd;
- }
- if (m_iPosition < m_iStart) {
- m_iPosition = m_iStart;
- }
- return m_iPosition - m_iStart;
+ m_iPosition = m_pStreamImp->Seek(eSeek, iOffset);
+ return m_iPosition;
}
+
int32_t CFGAS_Stream::GetPosition() {
- if (!m_pStreamImp) {
+ if (!m_pStreamImp)
return -1;
- }
- if (m_eStreamType == FX_STREAMTYPE_File ||
- m_eStreamType == FX_STREAMTYPE_Buffer) {
- return m_iPosition = m_pStreamImp->GetPosition();
- }
- return m_iPosition - m_iStart;
+ m_iPosition = m_pStreamImp->GetPosition();
+ return m_iPosition;
}
+
bool CFGAS_Stream::IsEOF() const {
- if (!m_pStreamImp) {
- return true;
- }
- if (m_eStreamType == FX_STREAMTYPE_File ||
- m_eStreamType == FX_STREAMTYPE_Buffer) {
- return m_pStreamImp->IsEOF();
- }
- return m_iPosition >= m_iStart + m_iLength;
+ return m_pStreamImp ? m_pStreamImp->IsEOF() : true;
}
+
int32_t CFGAS_Stream::ReadData(uint8_t* pBuffer, int32_t iBufferSize) {
ASSERT(pBuffer && iBufferSize > 0);
if (!m_pStreamImp) {
@@ -806,12 +700,7 @@ int32_t CFGAS_Stream::WriteData(const uint8_t* pBuffer, int32_t iBufferSize) {
return -1;
}
int32_t iLen = iBufferSize;
- if (m_eStreamType == FX_STREAMTYPE_Stream) {
- iLen = std::min(m_iStart + m_iTotalSize - m_iPosition, iBufferSize);
- if (iLen <= 0) {
- return 0;
- }
- }
+
int32_t iEnd = m_iStart + m_iLength;
if (m_pStreamImp->GetPosition() != m_iPosition) {
m_pStreamImp->Seek(FX_STREAMSEEK_Begin, m_iPosition);
@@ -832,12 +721,7 @@ int32_t CFGAS_Stream::WriteString(const wchar_t* pStr, int32_t iLength) {
return -1;
}
int32_t iLen = iLength;
- if (m_eStreamType == FX_STREAMTYPE_Stream) {
- iLen = std::min((m_iStart + m_iTotalSize - m_iPosition) / 2, iLength);
- if (iLen <= 0) {
- return 0;
- }
- }
+
int32_t iEnd = m_iStart + m_iLength;
if (m_pStreamImp->GetPosition() != m_iPosition) {
m_pStreamImp->Seek(FX_STREAMSEEK_Begin, m_iPosition);
@@ -910,28 +794,49 @@ bool CFGAS_FileRead::ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) {
// static
CFX_RetainPtr<IFGAS_Stream> IFGAS_Stream::CreateReadStream(
const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead) {
- auto pSR = pdfium::MakeRetain<CFGAS_Stream>();
- if (!pSR->LoadFileRead(pFileRead))
+ if (!pFileRead)
return nullptr;
- return pdfium::MakeRetain<CFGAS_TextStream>(pSR);
+
+ std::unique_ptr<IFGAS_StreamImp> pImp =
+ pdfium::MakeUnique<CFGAS_FileReadStreamImp>();
+ if (!static_cast<CFGAS_FileReadStreamImp*>(pImp.get())
+ ->LoadFileRead(pFileRead)) {
+ return nullptr;
+ }
+ return pdfium::MakeRetain<CFGAS_TextStream>(
+ pdfium::MakeRetain<CFGAS_Stream>(std::move(pImp), 0));
}
// static
CFX_RetainPtr<IFGAS_Stream> IFGAS_Stream::CreateWriteStream(
const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite) {
- auto pSR = pdfium::MakeRetain<CFGAS_Stream>();
- if (!pSR->LoadFileWrite(pFileWrite, FX_STREAMACCESS_Write))
+ if (!pFileWrite)
+ return nullptr;
+
+ std::unique_ptr<IFGAS_StreamImp> pImp =
+ pdfium::MakeUnique<CFGAS_FileWriteStreamImp>();
+ if (!static_cast<CFGAS_FileWriteStreamImp*>(pImp.get())
+ ->LoadFileWrite(pFileWrite, FX_STREAMACCESS_Write)) {
return nullptr;
- return pdfium::MakeRetain<CFGAS_TextStream>(pSR);
+ }
+
+ return pdfium::MakeRetain<CFGAS_TextStream>(
+ pdfium::MakeRetain<CFGAS_Stream>(std::move(pImp), FX_STREAMACCESS_Write));
}
// static
CFX_RetainPtr<IFGAS_Stream> IFGAS_Stream::CreateStream(uint8_t* pData,
int32_t length) {
- auto pSR = pdfium::MakeRetain<CFGAS_Stream>();
- if (!pSR->LoadBuffer(pData, length))
+ if (!pData || length < 1)
return nullptr;
- return pSR;
+
+ std::unique_ptr<IFGAS_StreamImp> pImp =
+ pdfium::MakeUnique<CFGAS_BufferStreamImp>();
+ if (!static_cast<CFGAS_BufferStreamImp*>(pImp.get())
+ ->LoadBuffer(pData, length))
+ return nullptr;
+
+ return pdfium::MakeRetain<CFGAS_Stream>(std::move(pImp), 0);
}
CFX_RetainPtr<IFX_SeekableReadStream> IFGAS_Stream::MakeSeekableReadStream() {
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