1 // Copyright 2014 The Chromium 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 #include "config.h" 6 #include "core/css/parser/MediaQueryInputStream.h" 7 8 #include "core/html/parser/InputStreamPreprocessor.h" 9 10 namespace WebCore { 11 12 MediaQueryInputStream::MediaQueryInputStream(String input) 13 : m_offset(0) 14 , m_string(input) 15 { 16 } 17 18 UChar MediaQueryInputStream::peek(unsigned lookaheadOffset) 19 { 20 ASSERT((m_offset + lookaheadOffset) <= maxLength()); 21 if ((m_offset + lookaheadOffset) >= m_string.length()) 22 return kEndOfFileMarker; 23 return m_string[m_offset + lookaheadOffset]; 24 } 25 26 void MediaQueryInputStream::advance(unsigned offset) 27 { 28 ASSERT(m_offset + offset <= maxLength()); 29 m_offset += offset; 30 } 31 32 void MediaQueryInputStream::pushBack(UChar cc) 33 { 34 --m_offset; 35 ASSERT(nextInputChar() == cc); 36 } 37 38 unsigned long long MediaQueryInputStream::getUInt(unsigned start, unsigned end) 39 { 40 ASSERT(start <= end && ((m_offset + end) <= m_string.length())); 41 bool isResultOK = false; 42 unsigned long long result = 0; 43 if (start < end) { 44 if (m_string.is8Bit()) 45 result = charactersToUInt64Strict(m_string.characters8() + m_offset + start, end - start, &isResultOK); 46 else 47 result = charactersToUInt64Strict(m_string.characters16() + m_offset + start, end - start, &isResultOK); 48 } 49 return isResultOK ? result : 0; 50 } 51 52 double MediaQueryInputStream::getDouble(unsigned start, unsigned end) 53 { 54 ASSERT(start <= end && ((m_offset + end) <= m_string.length())); 55 bool isResultOK = false; 56 double result = 0.0; 57 if (start < end) { 58 if (m_string.is8Bit()) 59 result = charactersToDouble(m_string.characters8() + m_offset + start, end - start, &isResultOK); 60 else 61 result = charactersToDouble(m_string.characters16() + m_offset + start, end - start, &isResultOK); 62 } 63 return isResultOK ? result : 0.0; 64 } 65 66 } // namespace WebCore 67
