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| 1 /* | |
| 2 * Copyright (C) 2007 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #ifndef WTF_UTF8_h | |
| 27 #define WTF_UTF8_h | |
| 28 | |
| 29 #include <wtf/unicode/Unicode.h> | |
| 30 | |
| 31 namespace WTF { | |
| 32 namespace Unicode { | |
| 33 | |
| 34 // Given a first byte, gives the length of the UTF-8 sequence it begins. | |
| 35 // Returns 0 for bytes that are not legal starts of UTF-8 sequences. | |
| 36 // Only allows sequences of up to 4 bytes, since that works for all Unicode
characters (U-00000000 to U-0010FFFF). | |
| 37 int UTF8SequenceLength(char); | |
| 38 | |
| 39 // Takes a null-terminated C-style string with a UTF-8 sequence in it and co
nverts it to a character. | |
| 40 // Only allows Unicode characters (U-00000000 to U-0010FFFF). | |
| 41 // Returns -1 if the sequence is not valid (including presence of extra byte
s). | |
| 42 int decodeUTF8Sequence(const char*); | |
| 43 | |
| 44 typedef enum { | |
| 45 conversionOK, // conversion successful | |
| 46 sourceExhausted, // partial character in source, but hit end | |
| 47 targetExhausted, // insuff. room in target for conversion | |
| 48 sourceIllegal // source sequence is illegal/malformed | |
| 49 } ConversionResult; | |
| 50 | |
| 51 // These conversion functions take a "strict" argument. When this | |
| 52 // flag is set to strict, both irregular sequences and isolated surrogates | |
| 53 // will cause an error. When the flag is set to lenient, both irregular | |
| 54 // sequences and isolated surrogates are converted. | |
| 55 // | |
| 56 // Whether the flag is strict or lenient, all illegal sequences will cause | |
| 57 // an error return. This includes sequences such as: <F4 90 80 80>, <C0 80>, | |
| 58 // or <A0> in UTF-8, and values above 0x10FFFF in UTF-32. Conformant code | |
| 59 // must check for illegal sequences. | |
| 60 // | |
| 61 // When the flag is set to lenient, characters over 0x10FFFF are converted | |
| 62 // to the replacement character; otherwise (when the flag is set to strict) | |
| 63 // they constitute an error. | |
| 64 | |
| 65 WTF_EXPORT_PRIVATE ConversionResult convertUTF8ToUTF16( | |
| 66 const char** sourceStart, const char* sourceEnd, | |
| 67 UChar** targetStart, UChar* targetEnd, bool* isSourceAllASCI
I = 0, bool strict = true); | |
| 68 | |
| 69 WTF_EXPORT_PRIVATE ConversionResult convertLatin1ToUTF8( | |
| 70 const LChar** sourceStart, const LChar* sourceEnd, | |
| 71 char** targetStart, char* targetEnd); | |
| 72 | |
| 73 WTF_EXPORT_PRIVATE ConversionResult convertUTF16ToUTF8( | |
| 74 const UChar** sourceStart, const UChar* sourceEnd, | |
| 75 char** targetStart, char* targetEnd, bool strict = true); | |
| 76 | |
| 77 WTF_EXPORT_PRIVATE unsigned calculateStringHashAndLengthFromUTF8MaskingTop8B
its(const char* data, const char* dataEnd, unsigned& dataLength, unsigned& utf16
Length); | |
| 78 | |
| 79 WTF_EXPORT_PRIVATE bool equalUTF16WithUTF8(const UChar* a, const UChar* aEnd
, const char* b, const char* bEnd); | |
| 80 | |
| 81 } // namespace Unicode | |
| 82 } // namespace WTF | |
| 83 | |
| 84 #endif // WTF_UTF8_h | |
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Chromium Code Reviews
Issue 14238015:
Move Source/WTF/wtf to Source/wtf (Closed)
Base URL: svn://svn.chromium.org/blink/trunk