1 // Copyright 2017 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 "core/fxcrt/css/cfx_csstextbuf.h" 8 9 #include "core/fxcrt/fx_memory.h" 10 CFX_CSSTextBuf()11CFX_CSSTextBuf::CFX_CSSTextBuf() 12 : m_pBuffer(nullptr), m_iBufLen(0), m_iDatLen(0) {} 13 ~CFX_CSSTextBuf()14CFX_CSSTextBuf::~CFX_CSSTextBuf() { 15 FX_Free(m_pBuffer); 16 m_pBuffer = nullptr; 17 m_iDatLen = m_iBufLen; 18 } 19 InitWithSize(int32_t iAllocSize)20void CFX_CSSTextBuf::InitWithSize(int32_t iAllocSize) { 21 ExpandBuf(iAllocSize); 22 } 23 AppendChar(wchar_t wch)24void CFX_CSSTextBuf::AppendChar(wchar_t wch) { 25 if (m_iDatLen >= m_iBufLen) 26 ExpandBuf(m_iBufLen * 2); 27 28 m_pBuffer[m_iDatLen++] = wch; 29 } 30 TrimEnd()31int32_t CFX_CSSTextBuf::TrimEnd() { 32 while (m_iDatLen > 0 && m_pBuffer[m_iDatLen - 1] <= ' ') 33 --m_iDatLen; 34 AppendChar(0); 35 return --m_iDatLen; 36 } 37 ExpandBuf(int32_t iDesiredSize)38void CFX_CSSTextBuf::ExpandBuf(int32_t iDesiredSize) { 39 ASSERT(iDesiredSize > 0); 40 if (m_pBuffer && m_iBufLen == iDesiredSize) 41 return; 42 43 if (m_pBuffer) 44 m_pBuffer = FX_Realloc(wchar_t, m_pBuffer, iDesiredSize); 45 else 46 m_pBuffer = FX_Alloc(wchar_t, iDesiredSize); 47 48 m_iBufLen = iDesiredSize; 49 } 50