60 lines
3.2 KiB
C++
60 lines
3.2 KiB
C++
/*
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* Copyright (C) 2007-2019 Apple Inc. All rights reserved.
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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 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 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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#pragma once
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#include <unicode/utypes.h>
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#include <wtf/text/LChar.h>
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namespace WTF {
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namespace Unicode {
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enum ConversionResult {
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ConversionOK, // conversion successful
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SourceExhausted, // partial character in source, but hit end
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TargetExhausted, // insufficient room in target for conversion
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SourceIllegal // source sequence is illegal/malformed
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};
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// Conversion functions are strict, except for convertUTF16ToUTF8, which takes
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// "strict" argument. When strict, both illegal sequences and unpaired surrogates
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// will cause an error. When not, illegal sequences and unpaired surrogates are
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// converted to the replacement character, except for an unpaired lead surrogate
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// at the end of the source, which will instead cause a SourceExhausted error.
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WTF_EXPORT_PRIVATE bool convertUTF8ToUTF16(const char* sourceStart, const char* sourceEnd, UChar** targetStart, UChar* targetEnd, bool* isSourceAllASCII = nullptr);
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WTF_EXPORT_PRIVATE bool convertUTF8ToUTF16ReplacingInvalidSequences(const char* sourceStart, const char* sourceEnd, UChar** targetStart, UChar* targetEnd, bool* isSourceAllASCII = nullptr);
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WTF_EXPORT_PRIVATE bool convertLatin1ToUTF8(const LChar** sourceStart, const LChar* sourceEnd, char** targetStart, char* targetEnd);
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WTF_EXPORT_PRIVATE ConversionResult convertUTF16ToUTF8(const UChar** sourceStart, const UChar* sourceEnd, char** targetStart, char* targetEnd, bool strict = true);
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WTF_EXPORT_PRIVATE unsigned calculateStringHashAndLengthFromUTF8MaskingTop8Bits(const char* data, const char* dataEnd, unsigned& dataLength, unsigned& utf16Length);
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// Callers of these functions must check that the lengths are the same; accordingly we omit an end argument for UTF-16 and Latin-1.
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bool equalUTF16WithUTF8(const UChar* stringInUTF16, const char* stringInUTF8, const char* stringInUTF8End);
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bool equalLatin1WithUTF8(const LChar* stringInLatin1, const char* stringInUTF8, const char* stringInUTF8End);
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} // namespace Unicode
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} // namespace WTF
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