| /* |
| ***************************************************************************************** |
| * Copyright (C) 1997-1999, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| ***************************************************************************************** |
| * |
| * File UNICDCM.CPP |
| * |
| * Modification History: |
| * |
| * Date Name Description |
| * 02/18/97 aliu Converted from OpenClass. |
| * 03/11/97 aliu Recoded mappedChar() slightly to clean up code and improve |
| * performance. |
| * 04/15/97 aliu Worked around bug in AIX xlC compiler which occurs if static |
| * arrays contain const elements. |
| * 05/06/97 aliu Made SpecialMapping an array of objects instead of pointers, |
| * to help out non-compliant compilers. |
| ***************************************************************************************** |
| */ |
| |
| // ***************************************************************************** |
| // This file was generated from the java source file UnicodeClassMapping.java |
| // ***************************************************************************** |
| |
| #include "unicdcm.h" |
| #include "unicode/unicode.h" |
| |
| // ***************************************************************************** |
| // class UnicodeClassMapping |
| // This class maps categories to state change inputs for the |
| // WordBreakTable. An entire category is mapped to the same |
| // value unless the character in question appears in the exception list. |
| // ***************************************************************************** |
| |
| // ------------------------------------- |
| |
| UnicodeClassMapping::UnicodeClassMapping(Type* mappedValue, |
| int32_t mappedValue_length, |
| const SpecialMapping* exceptionChars, |
| int32_t exceptionChars_length, |
| const bool_t *hasException, |
| Type* asciiValues) |
| : fMappedValue(mappedValue), |
| fMappedValue_length(mappedValue_length), |
| fExceptionChars(exceptionChars), |
| fExceptionChars_length(exceptionChars_length), |
| fHasException(hasException), |
| fAsciiValues(asciiValues) |
| { |
| } |
| |
| // ------------------------------------- |
| |
| TextBoundaryData::Type |
| UnicodeClassMapping::mappedChar(UChar ch) const |
| { |
| if (ch <= 255) { |
| return fAsciiValues[ ch ]; |
| } |
| |
| // get an appropriate category based on the character's Unicode class |
| // if there's no entry in the exception table for that Unicode class, |
| // we're done; otherwise we have to look in the exception table for |
| // the character's category (\uffff is treated here as a sentinel |
| // value meaning "end of the string"-- we always look in the exception |
| // table for its category) |
| Type chType = Unicode::getType(ch); |
| if ((fExceptionChars_length == 0) || |
| (!fHasException[chType] && (ch != (UChar)0xFFFF))) |
| { |
| return fMappedValue[chType]; |
| } |
| |
| // The invariant during this loop is that the character ch is <= max and |
| // >= min. We iterate until min == max. |
| int32_t min = 0; |
| int32_t max = fExceptionChars_length - 1; |
| while (max > min) { |
| int32_t pos = (max + min) >> 1; |
| if (ch > fExceptionChars[pos].fEndChar) { |
| min = pos + 1; |
| }else{ |
| max = pos; |
| } |
| } |
| const SpecialMapping* sm = &fExceptionChars[min]; |
| if (sm->fStartChar <= ch && ch <= sm->fEndChar) |
| return sm->fNewValue; |
| else |
| return fMappedValue[chType]; |
| } |
| |
| //eof |
