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-/*
- * Copyright (C) 2007 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 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.
- */
-
-#ifndef WTF_UTF8_h
-#define WTF_UTF8_h
-
-#include "Unicode.h"
-
-namespace WTF {
- namespace Unicode {
-
- // Given a first byte, gives the length of the UTF-8 sequence it begins.
- // Returns 0 for bytes that are not legal starts of UTF-8 sequences.
- // Only allows sequences of up to 4 bytes, since that works for all Unicode characters (U-00000000 to U-0010FFFF).
- int UTF8SequenceLength(char);
-
- // Takes a null-terminated C-style string with a UTF-8 sequence in it and converts it to a character.
- // Only allows Unicode characters (U-00000000 to U-0010FFFF).
- // Returns -1 if the sequence is not valid (including presence of extra bytes).
- int decodeUTF8Sequence(const char*);
-
- typedef enum {
- conversionOK, // conversion successful
- sourceExhausted, // partial character in source, but hit end
- targetExhausted, // insuff. room in target for conversion
- sourceIllegal // source sequence is illegal/malformed
- } ConversionResult;
-
- // These conversion functions take a "strict" argument. When this
- // flag is set to strict, both irregular sequences and isolated surrogates
- // will cause an error. When the flag is set to lenient, both irregular
- // sequences and isolated surrogates are converted.
- //
- // Whether the flag is strict or lenient, all illegal sequences will cause
- // an error return. This includes sequences such as: <F4 90 80 80>, <C0 80>,
- // or <A0> in UTF-8, and values above 0x10FFFF in UTF-32. Conformant code
- // must check for illegal sequences.
- //
- // When the flag is set to lenient, characters over 0x10FFFF are converted
- // to the replacement character; otherwise (when the flag is set to strict)
- // they constitute an error.
-
- ConversionResult convertUTF8ToUTF16(
- const char** sourceStart, const char* sourceEnd,
- UChar** targetStart, UChar* targetEnd, bool strict = true);
-
- ConversionResult convertUTF16ToUTF8(
- const UChar** sourceStart, const UChar* sourceEnd,
- char** targetStart, char* targetEnd, bool strict = true);
- }
-}
-
-#endif // WTF_UTF8_h