author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 13 Oct 2010 14:40:19 +0300 | |
branch | RCL_3 |
changeset 81 | 42552535c1ac |
parent 66 | 8b7f4e561641 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright 2001 Unicode, Inc. |
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* |
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* Disclaimer |
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* |
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* This source code is provided as is by Unicode, Inc. No claims are |
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* made as to fitness for any particular purpose. No warranties of any |
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* kind are expressed or implied. The recipient agrees to determine |
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* applicability of information provided. If this file has been |
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* purchased on magnetic or optical media from Unicode, Inc., the |
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* sole remedy for any claim will be exchange of defective media |
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* within 90 days of receipt. |
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* |
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* Limitations on Rights to Redistribute This Code |
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* |
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* Unicode, Inc. hereby grants the right to freely use the information |
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* supplied in this file in the creation of products supporting the |
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* Unicode Standard, and to make copies of this file in any form |
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* for internal or external distribution as long as this notice |
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* remains attached. |
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*/ |
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|
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/* --------------------------------------------------------------------- |
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|
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Conversions between UTF32, UTF-16, and UTF-8. Header file. |
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|
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Several funtions are included here, forming a complete set of |
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conversions between the three formats. UTF-7 is not included |
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here, but is handled in a separate source file. |
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|
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Each of these routines takes pointers to input buffers and output |
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buffers. The input buffers are const. |
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|
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Each routine converts the text between *sourceStart and sourceEnd, |
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putting the result into the buffer between *targetStart and |
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targetEnd. Note: the end pointers are *after* the last item: e.g. |
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*(sourceEnd - 1) is the last item. |
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|
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The return result indicates whether the conversion was successful, |
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and if not, whether the problem was in the source or target buffers. |
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(Only the first encountered problem is indicated.) |
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After the conversion, *sourceStart and *targetStart are both |
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updated to point to the end of last text successfully converted in |
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the respective buffers. |
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Input parameters: |
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sourceStart - pointer to a pointer to the source buffer. |
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The contents of this are modified on return so that |
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it points at the next thing to be converted. |
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targetStart - similarly, pointer to pointer to the target buffer. |
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sourceEnd, targetEnd - respectively pointers to the ends of the |
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two buffers, for overflow checking only. |
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These conversion functions take a ConversionFlags argument. When this |
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flag is set to strict, both irregular sequences and isolated surrogates |
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will cause an error. When the flag is set to lenient, both irregular |
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sequences and isolated surrogates are converted. |
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Whether the flag is strict or lenient, all illegal sequences will cause |
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an error return. This includes sequences such as: <F4 90 80 80>, <C0 80>, |
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or <A0> in UTF-8, and values above 0x10FFFF in UTF-32. Conformant code |
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must check for illegal sequences. |
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|
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When the flag is set to lenient, characters over 0x10FFFF are converted |
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to the replacement character; otherwise (when the flag is set to strict) |
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they constitute an error. |
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Output parameters: |
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The value "sourceIllegal" is returned from some routines if the input |
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sequence is malformed. When "sourceIllegal" is returned, the source |
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value will point to the illegal value that caused the problem. E.g., |
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in UTF-8 when a sequence is malformed, it points to the start of the |
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malformed sequence. |
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Author: Mark E. Davis, 1994. |
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Rev History: Rick McGowan, fixes & updates May 2001. |
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Fixes & updates, Sept 2001. |
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------------------------------------------------------------------------ */ |
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/* --------------------------------------------------------------------- |
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The following 4 definitions are compiler-specific. |
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The C standard does not guarantee that wchar_t has at least |
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16 bits, so wchar_t is no less portable than unsigned short! |
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All should be unsigned values to avoid sign extension during |
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bit mask & shift operations. |
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------------------------------------------------------------------------ */ |
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typedef unsigned long UTF32; /* at least 32 bits */ |
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typedef unsigned short UTF16; /* at least 16 bits */ |
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typedef unsigned char UTF8; /* typically 8 bits */ |
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typedef unsigned char Boolean; /* 0 or 1 */ |
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typedef UTF32 UCS4; /*Added for : PDEF140857*/ |
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|
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/* Some fundamental constants */ |
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#define UNI_REPLACEMENT_CHAR (UTF32)0x0000FFFD |
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#define UNI_MAX_BMP (UTF32)0x0000FFFF |
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#define UNI_MAX_UTF16 (UTF32)0x0010FFFF |
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#define UNI_MAX_UTF32 (UTF32)0x7FFFFFFF |
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typedef enum { |
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ok = 0, /* conversion successful */ /*Added for: PDEF140857*/ |
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conversionOK = 0, /* conversion successful */ |
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sourceExhausted, /* partial character in source, but hit end */ |
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targetExhausted, /* insuff. room in target for conversion */ |
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sourceIllegal /* source sequence is illegal/malformed */ |
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} ConversionResult; |
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109 |
|
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typedef enum { |
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strictConversion = 0, |
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lenientConversion |
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} ConversionFlags; |
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114 |
|
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/* This is for C++ and does no harm in C */ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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119 |
|
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ConversionResult ConvertUTF8toUTF16 ( |
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const UTF8** sourceStart, const UTF8* sourceEnd, |
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UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags); |
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123 |
|
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/*Added for : PDEF140857*/ |
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ConversionResult ConvertUTF16toUTF8 ( |
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UTF16** sourceStart, const UTF16* sourceEnd, |
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UTF8** targetStart, UTF8* targetEnd); |
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128 |
|
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/*Added for : PDEF140857*/ |
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ConversionResult ConvertUTF16toUTF8_original ( |
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UTF16** sourceStart, const UTF16* sourceEnd, |
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UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags); |
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133 |
|
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ConversionResult ConvertUTF8toUTF32 ( |
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const UTF8** sourceStart, const UTF8* sourceEnd, |
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UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags); |
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|
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ConversionResult ConvertUTF32toUTF8 ( |
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const UTF32** sourceStart, const UTF32* sourceEnd, |
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UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags); |
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141 |
|
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/*Added for : PDEF140857*/ |
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ConversionResult ConvertUTF16toUTF32 ( |
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UTF16** sourceStart, const UTF16* sourceEnd, |
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UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags); |
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|
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/*Added for PDEF140857*/ |
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ConversionResult ConvertUTF32toUTF16 ( |
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UTF32** sourceStart, const UTF32* sourceEnd, |
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UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags); |
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|
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/*Added for PDEF140857*/ |
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ConversionResult ConvertUCS4toUTF16 ( |
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UCS4** sourceStart, const UCS4* sourceEnd, |
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UTF16** targetStart, UTF16* targetEnd); |
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|
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/*Added for PDEF140857*/ |
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ConversionResult ConvertUTF16toUCS4 ( |
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UTF16** sourceStart, UTF16* sourceEnd, |
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UCS4** targetStart, UCS4* targetEnd); |
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Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd); |
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#ifdef __cplusplus |
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} |
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#endif |
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/* --------------------------------------------------------------------- */ |