icuSources/i18n/collationfastlatinbuilder.h

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 *******************************************************************************
   5 * Copyright (C) 2013-2016, International Business Machines
   6 * Corporation and others.  All Rights Reserved.
   7 *******************************************************************************
   8 * collationfastlatinbuilder.h
   9 *
  10 * created on: 2013aug09
  11 * created by: Markus W. Scherer
  12 */
  13
  14 #ifndef __COLLATIONFASTLATINBUILDER_H__
  15 #define __COLLATIONFASTLATINBUILDER_H__
  16
  17 #include "unicode/utypes.h"
  18
  19 #if !UCONFIG_NO_COLLATION
  20
  21 #include "unicode/ucol.h"
  22 #include "unicode/unistr.h"
  23 #include "unicode/uobject.h"
  24 #include "collation.h"
  25 #include "collationfastlatin.h"
  26 #include "uvectr64.h"
  27
  28 U_NAMESPACE_BEGIN
  29
  30 struct CollationData;
  31
  32 class U_I18N_API CollationFastLatinBuilder : public UObject {
  33 public:
  34     CollationFastLatinBuilder(UErrorCode &errorCode);
  35     ~CollationFastLatinBuilder();
  36
  37     UBool forData(const CollationData &data, UErrorCode &errorCode);
  38
  39     const uint16_t *getTable() const {
  40         return reinterpret_cast<const uint16_t *>(result.getBuffer());
  41     }
  42     int32_t lengthOfTable() const { return result.length(); }
  43
  44 private:
  45     // space, punct, symbol, currency (not digit)
  46     enum { NUM_SPECIAL_GROUPS = UCOL_REORDER_CODE_CURRENCY - UCOL_REORDER_CODE_FIRST + 1 };
  47
  48     UBool loadGroups(const CollationData &data, UErrorCode &errorCode);
  49     UBool inSameGroup(uint32_t p, uint32_t q) const;
  50
  51     void resetCEs();
  52     void getCEs(const CollationData &data, UErrorCode &errorCode);
  53     UBool getCEsFromCE32(const CollationData &data, UChar32 c, uint32_t ce32,
  54                          UErrorCode &errorCode);
  55     UBool getCEsFromContractionCE32(const CollationData &data, uint32_t ce32,
  56                                     UErrorCode &errorCode);
  57     void addContractionEntry(int32_t x, int64_t cce0, int64_t cce1, UErrorCode &errorCode);
  58     void addUniqueCE(int64_t ce, UErrorCode &errorCode);
  59     uint32_t getMiniCE(int64_t ce) const;
  60     UBool encodeUniqueCEs(UErrorCode &errorCode);
  61     UBool encodeCharCEs(UErrorCode &errorCode);
  62     UBool encodeContractions(UErrorCode &errorCode);
  63     uint32_t encodeTwoCEs(int64_t first, int64_t second) const;
  64
  65     static UBool isContractionCharCE(int64_t ce) {
  66         return (uint32_t)(ce >> 32) == Collation::NO_CE_PRIMARY && ce != Collation::NO_CE;
  67     }
  68
  69     static const uint32_t CONTRACTION_FLAG = 0x80000000;
  70
  71     // temporary "buffer"
  72     int64_t ce0, ce1;
  73
  74     int64_t charCEs[CollationFastLatin::NUM_FAST_CHARS][2];
  75
  76     UVector64 contractionCEs;
  77     UVector64 uniqueCEs;
  78
  79     /** One 16-bit mini CE per unique CE. */
  80     uint16_t *miniCEs;
  81
  82     // These are constant for a given root collator.
  83     uint32_t lastSpecialPrimaries[NUM_SPECIAL_GROUPS];
  84     uint32_t firstDigitPrimary;
  85     uint32_t firstLatinPrimary;
  86     uint32_t lastLatinPrimary;
  87     // This determines the first normal primary weight which is mapped to
  88     // a short mini primary. It must be >=firstDigitPrimary.
  89     uint32_t firstShortPrimary;
  90
  91     UBool shortPrimaryOverflow;
  92
  93     UnicodeString result;
  94     int32_t headerLength;
  95 };
  96
  97 U_NAMESPACE_END
  98
  99 #endif  // !UCONFIG_NO_COLLATION
 100 #endif  // __COLLATIONFASTLATINBUILDER_H__