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