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 39 namespace v8 { 40 namespace internal { 41 42 namespace { 43 44 // C++-style iterator adaptor for StringInputBuffer 45 // (unlike C++ iterators the end-marker has different type). 46 class 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 64 StringInputBufferIterator::StringInputBufferIterator( 65 StringInputBuffer* buffer) : buffer_(buffer) { 66 ++(*this); 67 } 68 69 int StringInputBufferIterator::operator*() const { 70 return current_; 71 } 72 73 74 void StringInputBufferIterator::operator++() { 75 end_ = !buffer_->has_more(); 76 if (!end_) { 77 current_ = buffer_->GetNext(); 78 } 79 } 80 } // End anonymous namespace. 81 82 83 double 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 } 105 106 107 double 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