summaryrefslogtreecommitdiffstats
path: root/intl/icu/source/common/static_unicode_sets.cpp
blob: 0db5ea000d4a545ddb58451b9908456dbdd1db9b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
// © 2018 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

// Allow implicit conversion from char16_t* to UnicodeString for this file:
// Helpful in toString methods and elsewhere.
#define UNISTR_FROM_STRING_EXPLICIT

#include "static_unicode_sets.h"
#include "umutex.h"
#include "ucln_cmn.h"
#include "unicode/uniset.h"
#include "uresimp.h"
#include "cstring.h"
#include "uassert.h"

using namespace icu;
using namespace icu::unisets;


namespace {

UnicodeSet* gUnicodeSets[UNISETS_KEY_COUNT] = {};

// Save the empty instance in static memory to have well-defined behavior if a
// regular UnicodeSet cannot be allocated.
alignas(UnicodeSet)
char gEmptyUnicodeSet[sizeof(UnicodeSet)];

// Whether the gEmptyUnicodeSet is initialized and ready to use.
UBool gEmptyUnicodeSetInitialized = false;

inline UnicodeSet* getImpl(Key key) {
    UnicodeSet* candidate = gUnicodeSets[key];
    if (candidate == nullptr) {
        return reinterpret_cast<UnicodeSet*>(gEmptyUnicodeSet);
    }
    return candidate;
}

UnicodeSet* computeUnion(Key k1, Key k2) {
    UnicodeSet* result = new UnicodeSet();
    if (result == nullptr) {
        return nullptr;
    }
    result->addAll(*getImpl(k1));
    result->addAll(*getImpl(k2));
    result->freeze();
    return result;
}

UnicodeSet* computeUnion(Key k1, Key k2, Key k3) {
    UnicodeSet* result = new UnicodeSet();
    if (result == nullptr) {
        return nullptr;
    }
    result->addAll(*getImpl(k1));
    result->addAll(*getImpl(k2));
    result->addAll(*getImpl(k3));
    result->freeze();
    return result;
}


void saveSet(Key key, const UnicodeString& unicodeSetPattern, UErrorCode& status) {
    // assert unicodeSets.get(key) == null;
    gUnicodeSets[key] = new UnicodeSet(unicodeSetPattern, status);
}

class ParseDataSink : public ResourceSink {
  public:
    void put(const char* key, ResourceValue& value, UBool /*noFallback*/, UErrorCode& status) override {
        ResourceTable contextsTable = value.getTable(status);
        if (U_FAILURE(status)) { return; }
        for (int i = 0; contextsTable.getKeyAndValue(i, key, value); i++) {
            if (uprv_strcmp(key, "date") == 0) {
                // ignore
            } else {
                ResourceTable strictnessTable = value.getTable(status);
                if (U_FAILURE(status)) { return; }
                for (int j = 0; strictnessTable.getKeyAndValue(j, key, value); j++) {
                    bool isLenient = (uprv_strcmp(key, "lenient") == 0);
                    ResourceArray array = value.getArray(status);
                    if (U_FAILURE(status)) { return; }
                    for (int k = 0; k < array.getSize(); k++) {
                        array.getValue(k, value);
                        UnicodeString str = value.getUnicodeString(status);
                        if (U_FAILURE(status)) { return; }
                        // There is both lenient and strict data for comma/period,
                        // but not for any of the other symbols.
                        if (str.indexOf(u'.') != -1) {
                            saveSet(isLenient ? PERIOD : STRICT_PERIOD, str, status);
                        } else if (str.indexOf(u',') != -1) {
                            saveSet(isLenient ? COMMA : STRICT_COMMA, str, status);
                        } else if (str.indexOf(u'+') != -1) {
                            saveSet(PLUS_SIGN, str, status);
                        } else if (str.indexOf(u'-') != -1) {
                            saveSet(MINUS_SIGN, str, status);
                        } else if (str.indexOf(u'$') != -1) {
                            saveSet(DOLLAR_SIGN, str, status);
                        } else if (str.indexOf(u'£') != -1) {
                            saveSet(POUND_SIGN, str, status);
                        } else if (str.indexOf(u'₹') != -1) {
                            saveSet(RUPEE_SIGN, str, status);
                        } else if (str.indexOf(u'¥') != -1) {
                            saveSet(YEN_SIGN, str, status);
                        } else if (str.indexOf(u'₩') != -1) {
                            saveSet(WON_SIGN, str, status);
                        } else if (str.indexOf(u'%') != -1) {
                            saveSet(PERCENT_SIGN, str, status);
                        } else if (str.indexOf(u'‰') != -1) {
                            saveSet(PERMILLE_SIGN, str, status);
                        } else if (str.indexOf(u'’') != -1) {
                            saveSet(APOSTROPHE_SIGN, str, status);
                        } else {
                            // Unknown class of parse lenients
                            // TODO(ICU-20428): Make ICU automatically accept new classes?
                            U_ASSERT(false);
                        }
                        if (U_FAILURE(status)) { return; }
                    }
                }
            }
        }
    }
};


icu::UInitOnce gNumberParseUniSetsInitOnce {};

UBool U_CALLCONV cleanupNumberParseUniSets() {
    if (gEmptyUnicodeSetInitialized) {
        reinterpret_cast<UnicodeSet*>(gEmptyUnicodeSet)->~UnicodeSet();
        gEmptyUnicodeSetInitialized = false;
    }
    for (int32_t i = 0; i < UNISETS_KEY_COUNT; i++) {
        delete gUnicodeSets[i];
        gUnicodeSets[i] = nullptr;
    }
    gNumberParseUniSetsInitOnce.reset();
    return true;
}

void U_CALLCONV initNumberParseUniSets(UErrorCode& status) {
    ucln_common_registerCleanup(UCLN_COMMON_NUMPARSE_UNISETS, cleanupNumberParseUniSets);

    // Initialize the empty instance for well-defined fallback behavior
    new(gEmptyUnicodeSet) UnicodeSet();
    reinterpret_cast<UnicodeSet*>(gEmptyUnicodeSet)->freeze();
    gEmptyUnicodeSetInitialized = true;

    // These sets were decided after discussion with icu-design@. See tickets #13084 and #13309.
    // Zs+TAB is "horizontal whitespace" according to UTS #18 (blank property).
    gUnicodeSets[DEFAULT_IGNORABLES] = new UnicodeSet(
            u"[[:Zs:][\\u0009][:Bidi_Control:][:Variation_Selector:]]", status);
    gUnicodeSets[STRICT_IGNORABLES] = new UnicodeSet(u"[[:Bidi_Control:]]", status);

    LocalUResourceBundlePointer rb(ures_open(nullptr, "root", &status));
    if (U_FAILURE(status)) { return; }
    ParseDataSink sink;
    ures_getAllItemsWithFallback(rb.getAlias(), "parse", sink, status);
    if (U_FAILURE(status)) { return; }

    // NOTE: It is OK for these assertions to fail if there was a no-data build.
    U_ASSERT(gUnicodeSets[COMMA] != nullptr);
    U_ASSERT(gUnicodeSets[STRICT_COMMA] != nullptr);
    U_ASSERT(gUnicodeSets[PERIOD] != nullptr);
    U_ASSERT(gUnicodeSets[STRICT_PERIOD] != nullptr);
    U_ASSERT(gUnicodeSets[APOSTROPHE_SIGN] != nullptr);

    LocalPointer<UnicodeSet> otherGrouping(new UnicodeSet(
        u"[٬‘\\u0020\\u00A0\\u2000-\\u200A\\u202F\\u205F\\u3000]",
        status
    ), status);
    if (U_FAILURE(status)) { return; }
    otherGrouping->addAll(*gUnicodeSets[APOSTROPHE_SIGN]);
    gUnicodeSets[OTHER_GROUPING_SEPARATORS] = otherGrouping.orphan();
    gUnicodeSets[ALL_SEPARATORS] = computeUnion(COMMA, PERIOD, OTHER_GROUPING_SEPARATORS);
    gUnicodeSets[STRICT_ALL_SEPARATORS] = computeUnion(
            STRICT_COMMA, STRICT_PERIOD, OTHER_GROUPING_SEPARATORS);

    U_ASSERT(gUnicodeSets[MINUS_SIGN] != nullptr);
    U_ASSERT(gUnicodeSets[PLUS_SIGN] != nullptr);
    U_ASSERT(gUnicodeSets[PERCENT_SIGN] != nullptr);
    U_ASSERT(gUnicodeSets[PERMILLE_SIGN] != nullptr);

    gUnicodeSets[INFINITY_SIGN] = new UnicodeSet(u"[∞]", status);
    if (U_FAILURE(status)) { return; }

    U_ASSERT(gUnicodeSets[DOLLAR_SIGN] != nullptr);
    U_ASSERT(gUnicodeSets[POUND_SIGN] != nullptr);
    U_ASSERT(gUnicodeSets[RUPEE_SIGN] != nullptr);
    U_ASSERT(gUnicodeSets[YEN_SIGN] != nullptr);
    U_ASSERT(gUnicodeSets[WON_SIGN] != nullptr);

    gUnicodeSets[DIGITS] = new UnicodeSet(u"[:digit:]", status);
    if (U_FAILURE(status)) { return; }
    gUnicodeSets[DIGITS_OR_ALL_SEPARATORS] = computeUnion(DIGITS, ALL_SEPARATORS);
    gUnicodeSets[DIGITS_OR_STRICT_ALL_SEPARATORS] = computeUnion(DIGITS, STRICT_ALL_SEPARATORS);

    for (auto* uniset : gUnicodeSets) {
        if (uniset != nullptr) {
            uniset->freeze();
        }
    }
}

}

const UnicodeSet* unisets::get(Key key) {
    UErrorCode localStatus = U_ZERO_ERROR;
    umtx_initOnce(gNumberParseUniSetsInitOnce, &initNumberParseUniSets, localStatus);
    if (U_FAILURE(localStatus)) {
        return reinterpret_cast<UnicodeSet*>(gEmptyUnicodeSet);
    }
    return getImpl(key);
}

Key unisets::chooseFrom(UnicodeString str, Key key1) {
    return get(key1)->contains(str) ? key1 : NONE;
}

Key unisets::chooseFrom(UnicodeString str, Key key1, Key key2) {
    return get(key1)->contains(str) ? key1 : chooseFrom(str, key2);
}

//Key unisets::chooseCurrency(UnicodeString str) {
//    if (get(DOLLAR_SIGN)->contains(str)) {
//        return DOLLAR_SIGN;
//    } else if (get(POUND_SIGN)->contains(str)) {
//        return POUND_SIGN;
//    } else if (get(RUPEE_SIGN)->contains(str)) {
//        return RUPEE_SIGN;
//    } else if (get(YEN_SIGN)->contains(str)) {
//        return YEN_SIGN;
//    } else {
//        return NONE;
//    }
//}


#endif /* #if !UCONFIG_NO_FORMATTING */