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 StringInputBuffer 45// (unlike C++ iterators the end-marker has different type). 46class StringInputBufferIterator { 47 public: 48 class EndMarker {}; 49 50 explicit StringInputBufferIterator(StringInputBuffer* buffer); 51 52 int 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 StringInputBuffer* const buffer_; 59 int current_; 60 bool end_; 61}; 62 63 64StringInputBufferIterator::StringInputBufferIterator( 65 StringInputBuffer* buffer) : buffer_(buffer) { 66 ++(*this); 67} 68 69int StringInputBufferIterator::operator*() const { 70 return current_; 71} 72 73 74void StringInputBufferIterator::operator++() { 75 end_ = !buffer_->has_more(); 76 if (!end_) { 77 current_ = buffer_->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 if (shape.IsSequentialAscii()) { 87 const char* begin = SeqAsciiString::cast(str)->GetChars(); 88 const char* end = begin + str->length(); 89 return InternalStringToDouble(unicode_cache, begin, end, flags, 90 empty_string_val); 91 } else if (shape.IsSequentialTwoByte()) { 92 const uc16* begin = SeqTwoByteString::cast(str)->GetChars(); 93 const uc16* end = begin + str->length(); 94 return InternalStringToDouble(unicode_cache, begin, end, flags, 95 empty_string_val); 96 } else { 97 StringInputBuffer buffer(str); 98 return InternalStringToDouble(unicode_cache, 99 StringInputBufferIterator(&buffer), 100 StringInputBufferIterator::EndMarker(), 101 flags, 102 empty_string_val); 103 } 104} 105 106 107double StringToInt(UnicodeCache* unicode_cache, 108 String* str, 109 int radix) { 110 StringShape shape(str); 111 if (shape.IsSequentialAscii()) { 112 const char* begin = SeqAsciiString::cast(str)->GetChars(); 113 const char* end = begin + str->length(); 114 return InternalStringToInt(unicode_cache, begin, end, radix); 115 } else if (shape.IsSequentialTwoByte()) { 116 const uc16* begin = SeqTwoByteString::cast(str)->GetChars(); 117 const uc16* end = begin + str->length(); 118 return InternalStringToInt(unicode_cache, begin, end, radix); 119 } else { 120 StringInputBuffer buffer(str); 121 return InternalStringToInt(unicode_cache, 122 StringInputBufferIterator(&buffer), 123 StringInputBufferIterator::EndMarker(), 124 radix); 125 } 126} 127 128} } // namespace v8::internal 129