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//
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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
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11//       with the distribution.
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13//       contributors may be used to endorse or promote products derived
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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,
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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