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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 
getTable()39     const uint16_t *getTable() const {
40         return reinterpret_cast<const uint16_t *>(result.getBuffer());
41     }
lengthOfTable()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 
isContractionCharCE(int64_t ce)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__
101