| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "sky/engine/core/css/parser/MediaQueryInputStream.h" |
| |
| namespace blink { |
| |
| MediaQueryInputStream::MediaQueryInputStream(String input) |
| : m_offset(0) |
| , m_string(input) |
| { |
| } |
| |
| UChar MediaQueryInputStream::peek(unsigned lookaheadOffset) |
| { |
| ASSERT((m_offset + lookaheadOffset) <= maxLength()); |
| if ((m_offset + lookaheadOffset) >= m_string.length()) |
| return kEndOfFileMarker; |
| return m_string[m_offset + lookaheadOffset]; |
| } |
| |
| void MediaQueryInputStream::advance(unsigned offset) |
| { |
| ASSERT(m_offset + offset <= maxLength()); |
| m_offset += offset; |
| } |
| |
| void MediaQueryInputStream::pushBack(UChar cc) |
| { |
| --m_offset; |
| ASSERT(nextInputChar() == cc); |
| } |
| |
| unsigned long long MediaQueryInputStream::getUInt(unsigned start, unsigned end) |
| { |
| ASSERT(start <= end && ((m_offset + end) <= m_string.length())); |
| bool isResultOK = false; |
| unsigned long long result = 0; |
| if (start < end) { |
| if (m_string.is8Bit()) |
| result = charactersToUInt64Strict(m_string.characters8() + m_offset + start, end - start, &isResultOK); |
| else |
| result = charactersToUInt64Strict(m_string.characters16() + m_offset + start, end - start, &isResultOK); |
| } |
| return isResultOK ? result : 0; |
| } |
| |
| double MediaQueryInputStream::getDouble(unsigned start, unsigned end) |
| { |
| ASSERT(start <= end && ((m_offset + end) <= m_string.length())); |
| bool isResultOK = false; |
| double result = 0.0; |
| if (start < end) { |
| if (m_string.is8Bit()) |
| result = charactersToDouble(m_string.characters8() + m_offset + start, end - start, &isResultOK); |
| else |
| result = charactersToDouble(m_string.characters16() + m_offset + start, end - start, &isResultOK); |
| } |
| return isResultOK ? result : 0.0; |
| } |
| |
| } // namespace blink |