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++();
operator ==(EndMarker const &) const54 bool operator==(EndMarker const&) const { return end_; }
operator !=(EndMarker const & m) const55 bool operator!=(EndMarker const& m) const { return !end_; }
56
57 private:
58 StringInputBuffer* const buffer_;
59 int current_;
60 bool end_;
61 };
62
63
StringInputBufferIterator(StringInputBuffer * buffer)64 StringInputBufferIterator::StringInputBufferIterator(
65 StringInputBuffer* buffer) : buffer_(buffer) {
66 ++(*this);
67 }
68
operator *() const69 int StringInputBufferIterator::operator*() const {
70 return current_;
71 }
72
73
operator ++()74 void StringInputBufferIterator::operator++() {
75 end_ = !buffer_->has_more();
76 if (!end_) {
77 current_ = buffer_->GetNext();
78 }
79 }
80 } // End anonymous namespace.
81
82
StringToDouble(UnicodeCache * unicode_cache,String * str,int flags,double empty_string_val)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
StringToInt(UnicodeCache * unicode_cache,String * str,int radix)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