v8/src/v8conversions.cc
yangguo@chromium.org e41c17084f Continues Latin-1 support. All tests pass with ENABLE_LATIN_1 flag.
R=yangguo@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/11818025
Patch from Dan Carney <dcarney@google.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13344 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2013-01-09 15:47:53 +00:00

133 lines
4.7 KiB
C++

// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <stdarg.h>
#include <limits.h>
#include "v8.h"
#include "conversions-inl.h"
#include "v8conversions.h"
#include "dtoa.h"
#include "factory.h"
#include "strtod.h"
namespace v8 {
namespace internal {
namespace {
// C++-style iterator adaptor for StringCharacterStream
// (unlike C++ iterators the end-marker has different type).
class StringCharacterStreamIterator {
public:
class EndMarker {};
explicit StringCharacterStreamIterator(StringCharacterStream* stream);
uint16_t operator*() const;
void operator++();
bool operator==(EndMarker const&) const { return end_; }
bool operator!=(EndMarker const& m) const { return !end_; }
private:
StringCharacterStream* const stream_;
uint16_t current_;
bool end_;
};
StringCharacterStreamIterator::StringCharacterStreamIterator(
StringCharacterStream* stream) : stream_(stream) {
++(*this);
}
uint16_t StringCharacterStreamIterator::operator*() const {
return current_;
}
void StringCharacterStreamIterator::operator++() {
end_ = !stream_->HasMore();
if (!end_) {
current_ = stream_->GetNext();
}
}
} // End anonymous namespace.
double StringToDouble(UnicodeCache* unicode_cache,
String* str, int flags, double empty_string_val) {
StringShape shape(str);
// TODO(dcarney): Use a Visitor here.
if (shape.IsSequentialAscii()) {
const uint8_t* begin = SeqOneByteString::cast(str)->GetChars();
const uint8_t* end = begin + str->length();
return InternalStringToDouble(unicode_cache, begin, end, flags,
empty_string_val);
} else if (shape.IsSequentialTwoByte()) {
const uc16* begin = SeqTwoByteString::cast(str)->GetChars();
const uc16* end = begin + str->length();
return InternalStringToDouble(unicode_cache, begin, end, flags,
empty_string_val);
} else {
ConsStringIteratorOp op;
StringCharacterStream stream(str, &op);
return InternalStringToDouble(unicode_cache,
StringCharacterStreamIterator(&stream),
StringCharacterStreamIterator::EndMarker(),
flags,
empty_string_val);
}
}
double StringToInt(UnicodeCache* unicode_cache,
String* str,
int radix) {
StringShape shape(str);
// TODO(dcarney): Use a Visitor here.
if (shape.IsSequentialAscii()) {
const uint8_t* begin = SeqOneByteString::cast(str)->GetChars();
const uint8_t* end = begin + str->length();
return InternalStringToInt(unicode_cache, begin, end, radix);
} else if (shape.IsSequentialTwoByte()) {
const uc16* begin = SeqTwoByteString::cast(str)->GetChars();
const uc16* end = begin + str->length();
return InternalStringToInt(unicode_cache, begin, end, radix);
} else {
ConsStringIteratorOp op;
StringCharacterStream stream(str, &op);
return InternalStringToInt(unicode_cache,
StringCharacterStreamIterator(&stream),
StringCharacterStreamIterator::EndMarker(),
radix);
}
}
} } // namespace v8::internal