| // 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 "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(FX_WCHAR); |
| } |
| |
| 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 = std::min(std::max(0, m_iPosition), m_wsBuffer.GetLength()); |
| return GetPosition(); |
| } |
| |
| int32_t CXFA_WideTextRead::GetPosition() { |
| return m_iPosition * sizeof(FX_WCHAR); |
| } |
| |
| 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(FX_WCHAR* 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 FX_WCHAR* 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(FX_WCHAR) == 2) ? FX_CODEPAGE_UTF16LE : FX_CODEPAGE_UTF32LE; |
| } |
| |
| uint16_t CXFA_WideTextRead::SetCodePage(uint16_t wCodePage) { |
| return GetCodePage(); |
| } |
| |
| CFX_RetainPtr<IFGAS_Stream> CXFA_WideTextRead::CreateSharedStream( |
| uint32_t dwAccess, |
| int32_t iOffset, |
| int32_t iLength) { |
| return nullptr; |
| } |
| |
| CFX_WideString CXFA_WideTextRead::GetSrcText() const { |
| return m_wsBuffer; |
| } |