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118 lines
4.2 KiB
C++
118 lines
4.2 KiB
C++
/*
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* Copyright (C) 2004, 2006 Apple Computer, Inc. All rights reserved.
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* Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_WTF_TEXT_TEXTCODEC_H_
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#define SKY_ENGINE_WTF_TEXT_TEXTCODEC_H_
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#include "flutter/sky/engine/wtf/Forward.h"
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#include "flutter/sky/engine/wtf/Noncopyable.h"
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#include "flutter/sky/engine/wtf/PassOwnPtr.h"
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#include "flutter/sky/engine/wtf/text/WTFString.h"
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#include "flutter/sky/engine/wtf/unicode/Unicode.h"
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namespace WTF {
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class TextEncoding;
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// Specifies what will happen when a character is encountered that is
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// not encodable in the character set.
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enum UnencodableHandling {
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// Substitutes the replacement character "?".
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QuestionMarksForUnencodables,
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// Encodes the character as an XML entity. For example, U+06DE
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// would be "۞" (0x6DE = 1758 in octal).
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EntitiesForUnencodables,
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// Encodes the character as en entity as above, but escaped
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// non-alphanumeric characters. This is used in URLs.
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// For example, U+6DE would be "%26%231758%3B".
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URLEncodedEntitiesForUnencodables
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};
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typedef char UnencodableReplacementArray[32];
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enum FlushBehavior {
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// More bytes are coming, don't flush the codec.
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DoNotFlush = 0,
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// A fetch has hit EOF. Some codecs handle fetches differently, for compat
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// reasons.
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FetchEOF,
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// Do a full flush of the codec.
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DataEOF
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};
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COMPILE_ASSERT(!DoNotFlush, DoNotFlush_is_falsy);
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COMPILE_ASSERT(FetchEOF, FetchEOF_is_truthy);
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COMPILE_ASSERT(DataEOF, DataEOF_is_truthy);
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class TextCodec {
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WTF_MAKE_NONCOPYABLE(TextCodec);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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TextCodec() {}
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virtual ~TextCodec();
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String decode(const char* str,
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size_t length,
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FlushBehavior flush = DoNotFlush) {
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bool ignored;
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return decode(str, length, flush, false, ignored);
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}
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virtual String decode(const char*,
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size_t length,
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FlushBehavior,
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bool stopOnError,
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bool& sawError) = 0;
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virtual CString encode(const UChar*, size_t length, UnencodableHandling) = 0;
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virtual CString encode(const LChar*, size_t length, UnencodableHandling) = 0;
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// Fills a null-terminated string representation of the given
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// unencodable character into the given replacement buffer.
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// The length of the string (not including the null) will be returned.
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static int getUnencodableReplacement(unsigned codePoint,
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UnencodableHandling,
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UnencodableReplacementArray);
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};
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typedef void (*EncodingNameRegistrar)(const char* alias, const char* name);
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typedef PassOwnPtr<TextCodec> (
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*NewTextCodecFunction)(const TextEncoding&, const void* additionalData);
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typedef void (*TextCodecRegistrar)(const char* name,
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NewTextCodecFunction,
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const void* additionalData);
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} // namespace WTF
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using WTF::TextCodec;
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#endif // SKY_ENGINE_WTF_TEXT_TEXTCODEC_H_
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