1// Copyright 2011 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28#include <stdarg.h> 29#include <limits.h> 30 31#include "v8.h" 32 33#include "conversions-inl.h" 34#include "v8conversions.h" 35#include "dtoa.h" 36#include "factory.h" 37#include "strtod.h" 38 39namespace v8 { 40namespace internal { 41 42namespace { 43 44// C++-style iterator adaptor for StringCharacterStream 45// (unlike C++ iterators the end-marker has different type). 46class StringCharacterStreamIterator { 47 public: 48 class EndMarker {}; 49 50 explicit StringCharacterStreamIterator(StringCharacterStream* stream); 51 52 uint16_t operator*() const; 53 void operator++(); 54 bool operator==(EndMarker const&) const { return end_; } 55 bool operator!=(EndMarker const& m) const { return !end_; } 56 57 private: 58 StringCharacterStream* const stream_; 59 uint16_t current_; 60 bool end_; 61}; 62 63 64StringCharacterStreamIterator::StringCharacterStreamIterator( 65 StringCharacterStream* stream) : stream_(stream) { 66 ++(*this); 67} 68 69uint16_t StringCharacterStreamIterator::operator*() const { 70 return current_; 71} 72 73 74void StringCharacterStreamIterator::operator++() { 75 end_ = !stream_->HasMore(); 76 if (!end_) { 77 current_ = stream_->GetNext(); 78 } 79} 80} // End anonymous namespace. 81 82 83double StringToDouble(UnicodeCache* unicode_cache, 84 String* str, int flags, double empty_string_val) { 85 StringShape shape(str); 86 // TODO(dcarney): Use a Visitor here. 87 if (shape.IsSequentialAscii()) { 88 const uint8_t* begin = SeqOneByteString::cast(str)->GetChars(); 89 const uint8_t* end = begin + str->length(); 90 return InternalStringToDouble(unicode_cache, begin, end, flags, 91 empty_string_val); 92 } else if (shape.IsSequentialTwoByte()) { 93 const uc16* begin = SeqTwoByteString::cast(str)->GetChars(); 94 const uc16* end = begin + str->length(); 95 return InternalStringToDouble(unicode_cache, begin, end, flags, 96 empty_string_val); 97 } else { 98 ConsStringIteratorOp op; 99 StringCharacterStream stream(str, &op); 100 return InternalStringToDouble(unicode_cache, 101 StringCharacterStreamIterator(&stream), 102 StringCharacterStreamIterator::EndMarker(), 103 flags, 104 empty_string_val); 105 } 106} 107 108 109double StringToInt(UnicodeCache* unicode_cache, 110 String* str, 111 int radix) { 112 StringShape shape(str); 113 // TODO(dcarney): Use a Visitor here. 114 if (shape.IsSequentialAscii()) { 115 const uint8_t* begin = SeqOneByteString::cast(str)->GetChars(); 116 const uint8_t* end = begin + str->length(); 117 return InternalStringToInt(unicode_cache, begin, end, radix); 118 } else if (shape.IsSequentialTwoByte()) { 119 const uc16* begin = SeqTwoByteString::cast(str)->GetChars(); 120 const uc16* end = begin + str->length(); 121 return InternalStringToInt(unicode_cache, begin, end, radix); 122 } else { 123 ConsStringIteratorOp op; 124 StringCharacterStream stream(str, &op); 125 return InternalStringToInt(unicode_cache, 126 StringCharacterStreamIterator(&stream), 127 StringCharacterStreamIterator::EndMarker(), 128 radix); 129 } 130} 131 132} } // namespace v8::internal 133