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comparison: intl/icu/source/i18n/regeximp.cpp
intl/icu/source/i18n/regeximp.cpp
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
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| -1:000000000000 | 0:c64c3749495e |
|---|---|
| 1 // | |
| 2 // Copyright (C) 2012 International Business Machines Corporation | |
| 3 // and others. All rights reserved. | |
| 4 // | |
| 5 // file: regeximp.cpp | |
| 6 // | |
| 7 // ICU Regular Expressions, | |
| 8 // miscellaneous implementation functions. | |
| 9 // | |
| 10 | |
| 11 #include "unicode/utypes.h" | |
| 12 | |
| 13 #if !UCONFIG_NO_REGULAR_EXPRESSIONS | |
| 14 #include "regeximp.h" | |
| 15 #include "unicode/utf16.h" | |
| 16 | |
| 17 U_NAMESPACE_BEGIN | |
| 18 | |
| 19 CaseFoldingUTextIterator::CaseFoldingUTextIterator(UText &text) : | |
| 20 fUText(text), fcsp(NULL), fFoldChars(NULL), fFoldLength(0) { | |
| 21 fcsp = ucase_getSingleton(); | |
| 22 } | |
| 23 | |
| 24 CaseFoldingUTextIterator::~CaseFoldingUTextIterator() {} | |
| 25 | |
| 26 UChar32 CaseFoldingUTextIterator::next() { | |
| 27 UChar32 foldedC; | |
| 28 UChar32 originalC; | |
| 29 if (fFoldChars == NULL) { | |
| 30 // We are not in a string folding of an earlier character. | |
| 31 // Start handling the next char from the input UText. | |
| 32 originalC = UTEXT_NEXT32(&fUText); | |
| 33 if (originalC == U_SENTINEL) { | |
| 34 return originalC; | |
| 35 } | |
| 36 fFoldLength = ucase_toFullFolding(fcsp, originalC, &fFoldChars, U_FOLD_CASE_DEFAULT); | |
| 37 if (fFoldLength >= UCASE_MAX_STRING_LENGTH || fFoldLength < 0) { | |
| 38 // input code point folds to a single code point, possibly itself. | |
| 39 // See comment in ucase.h for explanation of return values from ucase_toFullFoldings. | |
| 40 if (fFoldLength < 0) { | |
| 41 fFoldLength = ~fFoldLength; | |
| 42 } | |
| 43 foldedC = (UChar32)fFoldLength; | |
| 44 fFoldChars = NULL; | |
| 45 return foldedC; | |
| 46 } | |
| 47 // String foldings fall through here. | |
| 48 fFoldIndex = 0; | |
| 49 } | |
| 50 | |
| 51 U16_NEXT(fFoldChars, fFoldIndex, fFoldLength, foldedC); | |
| 52 if (fFoldIndex >= fFoldLength) { | |
| 53 fFoldChars = NULL; | |
| 54 } | |
| 55 return foldedC; | |
| 56 } | |
| 57 | |
| 58 | |
| 59 UBool CaseFoldingUTextIterator::inExpansion() { | |
| 60 return fFoldChars != NULL; | |
| 61 } | |
| 62 | |
| 63 | |
| 64 | |
| 65 CaseFoldingUCharIterator::CaseFoldingUCharIterator(const UChar *chars, int64_t start, int64_t limit) : | |
| 66 fChars(chars), fIndex(start), fLimit(limit), fcsp(NULL), fFoldChars(NULL), fFoldLength(0) { | |
| 67 fcsp = ucase_getSingleton(); | |
| 68 } | |
| 69 | |
| 70 | |
| 71 CaseFoldingUCharIterator::~CaseFoldingUCharIterator() {} | |
| 72 | |
| 73 | |
| 74 UChar32 CaseFoldingUCharIterator::next() { | |
| 75 UChar32 foldedC; | |
| 76 UChar32 originalC; | |
| 77 if (fFoldChars == NULL) { | |
| 78 // We are not in a string folding of an earlier character. | |
| 79 // Start handling the next char from the input UText. | |
| 80 if (fIndex >= fLimit) { | |
| 81 return U_SENTINEL; | |
| 82 } | |
| 83 U16_NEXT(fChars, fIndex, fLimit, originalC); | |
| 84 | |
| 85 fFoldLength = ucase_toFullFolding(fcsp, originalC, &fFoldChars, U_FOLD_CASE_DEFAULT); | |
| 86 if (fFoldLength >= UCASE_MAX_STRING_LENGTH || fFoldLength < 0) { | |
| 87 // input code point folds to a single code point, possibly itself. | |
| 88 // See comment in ucase.h for explanation of return values from ucase_toFullFoldings. | |
| 89 if (fFoldLength < 0) { | |
| 90 fFoldLength = ~fFoldLength; | |
| 91 } | |
| 92 foldedC = (UChar32)fFoldLength; | |
| 93 fFoldChars = NULL; | |
| 94 return foldedC; | |
| 95 } | |
| 96 // String foldings fall through here. | |
| 97 fFoldIndex = 0; | |
| 98 } | |
| 99 | |
| 100 U16_NEXT(fFoldChars, fFoldIndex, fFoldLength, foldedC); | |
| 101 if (fFoldIndex >= fFoldLength) { | |
| 102 fFoldChars = NULL; | |
| 103 } | |
| 104 return foldedC; | |
| 105 } | |
| 106 | |
| 107 | |
| 108 UBool CaseFoldingUCharIterator::inExpansion() { | |
| 109 return fFoldChars != NULL; | |
| 110 } | |
| 111 | |
| 112 int64_t CaseFoldingUCharIterator::getIndex() { | |
| 113 return fIndex; | |
| 114 } | |
| 115 | |
| 116 | |
| 117 U_NAMESPACE_END | |
| 118 | |
| 119 #endif | |
| 120 |
