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
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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
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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 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