1// Copyright 2016 PDFium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7#include "xfa/fxfa/parser/cxfa_widetextread.h" 8 9#include <algorithm> 10 11#include "core/fxcrt/fx_ext.h" 12#include "xfa/fgas/crt/fgas_codepage.h" 13 14CXFA_WideTextRead::CXFA_WideTextRead(const CFX_WideString& wsBuffer) 15 : m_wsBuffer(wsBuffer), m_iPosition(0) {} 16 17CXFA_WideTextRead::~CXFA_WideTextRead() {} 18 19uint32_t CXFA_WideTextRead::GetAccessModes() const { 20 return FX_STREAMACCESS_Read | FX_STREAMACCESS_Text; 21} 22 23int32_t CXFA_WideTextRead::GetLength() const { 24 return m_wsBuffer.GetLength() * sizeof(FX_WCHAR); 25} 26 27int32_t CXFA_WideTextRead::Seek(FX_STREAMSEEK eSeek, int32_t iOffset) { 28 switch (eSeek) { 29 case FX_STREAMSEEK_Begin: 30 m_iPosition = iOffset; 31 break; 32 case FX_STREAMSEEK_Current: 33 m_iPosition += iOffset; 34 break; 35 case FX_STREAMSEEK_End: 36 m_iPosition = m_wsBuffer.GetLength() + iOffset; 37 break; 38 } 39 m_iPosition = std::min(std::max(0, m_iPosition), m_wsBuffer.GetLength()); 40 return GetPosition(); 41} 42 43int32_t CXFA_WideTextRead::GetPosition() { 44 return m_iPosition * sizeof(FX_WCHAR); 45} 46 47bool CXFA_WideTextRead::IsEOF() const { 48 return m_iPosition >= m_wsBuffer.GetLength(); 49} 50 51int32_t CXFA_WideTextRead::ReadData(uint8_t* pBuffer, int32_t iBufferSize) { 52 return 0; 53} 54 55int32_t CXFA_WideTextRead::ReadString(FX_WCHAR* pStr, 56 int32_t iMaxLength, 57 bool& bEOS) { 58 iMaxLength = std::min(iMaxLength, m_wsBuffer.GetLength() - m_iPosition); 59 if (iMaxLength == 0) 60 return 0; 61 62 FXSYS_wcsncpy(pStr, m_wsBuffer.c_str() + m_iPosition, iMaxLength); 63 m_iPosition += iMaxLength; 64 bEOS = IsEOF(); 65 return iMaxLength; 66} 67 68int32_t CXFA_WideTextRead::WriteData(const uint8_t* pBuffer, 69 int32_t iBufferSize) { 70 return 0; 71} 72 73int32_t CXFA_WideTextRead::WriteString(const FX_WCHAR* pStr, int32_t iLength) { 74 return 0; 75} 76 77bool CXFA_WideTextRead::SetLength(int32_t iLength) { 78 return false; 79} 80 81int32_t CXFA_WideTextRead::GetBOM(uint8_t bom[4]) const { 82 return 0; 83} 84 85uint16_t CXFA_WideTextRead::GetCodePage() const { 86 return (sizeof(FX_WCHAR) == 2) ? FX_CODEPAGE_UTF16LE : FX_CODEPAGE_UTF32LE; 87} 88 89uint16_t CXFA_WideTextRead::SetCodePage(uint16_t wCodePage) { 90 return GetCodePage(); 91} 92 93CFX_RetainPtr<IFGAS_Stream> CXFA_WideTextRead::CreateSharedStream( 94 uint32_t dwAccess, 95 int32_t iOffset, 96 int32_t iLength) { 97 return nullptr; 98} 99 100CFX_WideString CXFA_WideTextRead::GetSrcText() const { 101 return m_wsBuffer; 102} 103