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TextEncoding.h
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/*
* Copyright (C) 2004-2017 Apple Inc. All rights reserved.
*
* 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 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 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.
*/
#pragma once
#include <pal/text/UnencodableHandling.h>
#include <wtf/URL.h>
#include <wtf/text/StringView.h>
namespace WebCore {
enum class NFCNormalize : bool { No, Yes };
class TextEncoding : public WTF::URLTextEncoding {
public:
TextEncoding() = default;
WEBCORE_EXPORT TextEncoding(const char* name);
WEBCORE_EXPORT TextEncoding(const String& name);
bool isValid() const { return m_name; }
const char* name() const { return m_name; }
WEBCORE_EXPORT const char* domName() const; // name exposed via DOM
bool usesVisualOrdering() const;
bool isJapanese() const;
const TextEncoding& closestByteBasedEquivalent() const;
const TextEncoding& encodingForFormSubmissionOrURLParsing() const;
WEBCORE_EXPORT String decode(const char*, size_t length, bool stopOnError, bool& sawError) const;
String decode(const char*, size_t length) const;
String decode(const uint8_t* data, size_t length) const { return decode(reinterpret_cast<const char*>(data), length); }
WEBCORE_EXPORT Vector<uint8_t> encode(StringView, UnencodableHandling, NFCNormalize = NFCNormalize::Yes) const;
Vector<uint8_t> encodeForURLParsing(StringView string) const final { return encode(string, UnencodableHandling::URLEncodedEntities, NFCNormalize::No); }
UChar backslashAsCurrencySymbol() const;
bool isByteBasedEncoding() const { return !isNonByteBasedEncoding(); }
private:
bool isNonByteBasedEncoding() const;
bool isUTF7Encoding() const;
const char* m_name { nullptr };
UChar m_backslashAsCurrencySymbol;
};
inline bool operator==(const TextEncoding& a, const TextEncoding& b) { return a.name() == b.name(); }
inline bool operator!=(const TextEncoding& a, const TextEncoding& b) { return a.name() != b.name(); }
const TextEncoding& ASCIIEncoding();
const TextEncoding& Latin1Encoding();
const TextEncoding& UTF16BigEndianEncoding();
const TextEncoding& UTF16LittleEndianEncoding();
WEBCORE_EXPORT const TextEncoding& UTF8Encoding();
WEBCORE_EXPORT const TextEncoding& WindowsLatin1Encoding();
// Unescapes the given string using URL escaping rules.
// DANGER: If the URL has "%00" in it,
// the resulting string will have embedded null characters!
WEBCORE_EXPORT String decodeURLEscapeSequences(StringView, const TextEncoding& = UTF8Encoding());
inline String TextEncoding::decode(const char* characters, size_t length) const
{
bool ignored;
return decode(characters, length, false, ignored);
}
} // namespace WebCore