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/*
* Copyright (C) 2004, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com>
* Copyright (C) 2007-2009 Torch Mobile, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 "third_party/blink/renderer/platform/wtf/text/text_encoding.h"
#include <memory>
#include "third_party/blink/renderer/platform/wtf/std_lib_extras.h"
#include "third_party/blink/renderer/platform/wtf/text/character_visitor.h"
#include "third_party/blink/renderer/platform/wtf/text/text_encoding_registry.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/threading.h"
namespace WTF {
TextEncoding::TextEncoding(const char* name)
: name_(AtomicString(AtomicCanonicalTextEncodingName(name))) {}
TextEncoding::TextEncoding(const String& name)
: name_(AtomicString(AtomicCanonicalTextEncodingName(name))) {}
String TextEncoding::Decode(base::span<const uint8_t> data,
bool stop_on_error,
bool& saw_error) const {
if (!name_)
return String();
return NewTextCodec(*this)->Decode(data, FlushBehavior::kDataEOF,
stop_on_error, saw_error);
}
std::string TextEncoding::Encode(const StringView& string,
UnencodableHandling handling) const {
if (!name_)
return std::string();
if (string.empty())
return std::string();
std::unique_ptr<TextCodec> text_codec = NewTextCodec(*this);
return WTF::VisitCharacters(string, [&text_codec, handling](auto chars) {
return text_codec->Encode(chars, handling);
});
}
bool TextEncoding::UsesVisualOrdering() const {
if (NoExtendedTextEncodingNameUsed())
return false;
static const char* const kA = AtomicCanonicalTextEncodingName("ISO-8859-8");
return name_ == kA;
}
bool TextEncoding::IsNonByteBasedEncoding() const {
return *this == UTF16LittleEndianEncoding() ||
*this == UTF16BigEndianEncoding();
}
const TextEncoding& TextEncoding::ClosestByteBasedEquivalent() const {
if (IsNonByteBasedEncoding())
return UTF8Encoding();
return *this;
}
// HTML5 specifies that UTF-8 be used in form submission when a form is is a
// part of a document in UTF-16 probably because UTF-16 is not a byte-based
// encoding and can contain 0x00.
const TextEncoding& TextEncoding::EncodingForFormSubmission() const {
if (IsNonByteBasedEncoding())
return UTF8Encoding();
return *this;
}
const TextEncoding& ASCIIEncoding() {
DEFINE_THREAD_SAFE_STATIC_LOCAL(const TextEncoding, global_ascii_encoding,
("ASCII"));
return global_ascii_encoding;
}
const TextEncoding& Latin1Encoding() {
DEFINE_THREAD_SAFE_STATIC_LOCAL(const TextEncoding, global_latin1_encoding,
("latin1"));
return global_latin1_encoding;
}
const TextEncoding& UTF16BigEndianEncoding() {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
const TextEncoding, global_utf16_big_endian_encoding, ("UTF-16BE"));
return global_utf16_big_endian_encoding;
}
const TextEncoding& UTF16LittleEndianEncoding() {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
const TextEncoding, global_utf16_little_endian_encoding, ("UTF-16LE"));
return global_utf16_little_endian_encoding;
}
const TextEncoding& UTF8Encoding() {
DEFINE_THREAD_SAFE_STATIC_LOCAL(const TextEncoding, global_utf8_encoding,
("UTF-8"));
DCHECK(global_utf8_encoding.IsValid());
return global_utf8_encoding;
}
const TextEncoding& WindowsLatin1Encoding() {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
const TextEncoding, global_windows_latin1_encoding, ("WinLatin1"));
return global_windows_latin1_encoding;
}
const TextEncoding& UnknownEncoding() {
DEFINE_THREAD_SAFE_STATIC_LOCAL(const TextEncoding, global_unknown_encoding,
("Unknown"));
return global_unknown_encoding;
}
} // namespace WTF
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