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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 "xfa/fxfa/parser/cxfa_widetextread.h"
#include <algorithm>
#include "core/fxcrt/fx_ext.h"
#include "third_party/base/stl_util.h"
#include "xfa/fgas/crt/fgas_codepage.h"
CXFA_WideTextRead::CXFA_WideTextRead(const CFX_WideString& wsBuffer)
: m_wsBuffer(wsBuffer), m_iPosition(0) {}
CXFA_WideTextRead::~CXFA_WideTextRead() {}
uint32_t CXFA_WideTextRead::GetAccessModes() const {
return FX_STREAMACCESS_Read | FX_STREAMACCESS_Text;
}
int32_t CXFA_WideTextRead::GetLength() const {
return m_wsBuffer.GetLength() * sizeof(wchar_t);
}
int32_t CXFA_WideTextRead::Seek(FX_STREAMSEEK eSeek, int32_t iOffset) {
switch (eSeek) {
case FX_STREAMSEEK_Begin:
m_iPosition = iOffset;
break;
case FX_STREAMSEEK_Current:
m_iPosition += iOffset;
break;
case FX_STREAMSEEK_End:
m_iPosition = m_wsBuffer.GetLength() + iOffset;
break;
}
m_iPosition = pdfium::clamp(0, m_iPosition, m_wsBuffer.GetLength());
return GetPosition();
}
int32_t CXFA_WideTextRead::GetPosition() {
return m_iPosition * sizeof(wchar_t);
}
bool CXFA_WideTextRead::IsEOF() const {
return m_iPosition >= m_wsBuffer.GetLength();
}
int32_t CXFA_WideTextRead::ReadData(uint8_t* pBuffer, int32_t iBufferSize) {
return 0;
}
int32_t CXFA_WideTextRead::ReadString(wchar_t* pStr,
int32_t iMaxLength,
bool& bEOS) {
iMaxLength = std::min(iMaxLength, m_wsBuffer.GetLength() - m_iPosition);
if (iMaxLength == 0)
return 0;
FXSYS_wcsncpy(pStr, m_wsBuffer.c_str() + m_iPosition, iMaxLength);
m_iPosition += iMaxLength;
bEOS = IsEOF();
return iMaxLength;
}
int32_t CXFA_WideTextRead::WriteData(const uint8_t* pBuffer,
int32_t iBufferSize) {
return 0;
}
int32_t CXFA_WideTextRead::WriteString(const wchar_t* pStr, int32_t iLength) {
return 0;
}
bool CXFA_WideTextRead::SetLength(int32_t iLength) {
return false;
}
int32_t CXFA_WideTextRead::GetBOM(uint8_t bom[4]) const {
return 0;
}
uint16_t CXFA_WideTextRead::GetCodePage() const {
return (sizeof(wchar_t) == 2) ? FX_CODEPAGE_UTF16LE : FX_CODEPAGE_UTF32LE;
}
uint16_t CXFA_WideTextRead::SetCodePage(uint16_t wCodePage) {
return GetCodePage();
}
CFX_WideString CXFA_WideTextRead::GetSrcText() const {
return m_wsBuffer;
}
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