aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/icu/i18n/numrange_impl.cpp
blob: 002a8b2a2101f0296bfe9cfb1ca715ebb5951718 (plain) (blame)
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
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
// © 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 "unicode/numberrangeformatter.h"
#include "numrange_impl.h"
#include "patternprops.h"
#include "pluralranges.h"
#include "uresimp.h"
#include "util.h"

using namespace icu;
using namespace icu::number;
using namespace icu::number::impl;

namespace {

// Helper function for 2-dimensional switch statement
constexpr int8_t identity2d(UNumberRangeIdentityFallback a, UNumberRangeIdentityResult b) {
    return static_cast<int8_t>(a) | (static_cast<int8_t>(b) << 4);
}


struct NumberRangeData {
    SimpleFormatter rangePattern;
    // Note: approximatelyPattern is unused since ICU 69.
    // SimpleFormatter approximatelyPattern;
};

class NumberRangeDataSink : public ResourceSink {
  public:
    NumberRangeDataSink(NumberRangeData& data) : fData(data) {}

    void put(const char* key, ResourceValue& value, UBool /*noFallback*/, UErrorCode& status) override {
        ResourceTable miscTable = value.getTable(status);
        if (U_FAILURE(status)) { return; }
        for (int i = 0; miscTable.getKeyAndValue(i, key, value); i++) {
            if (uprv_strcmp(key, "range") == 0) {
                if (hasRangeData()) {
                    continue; // have already seen this pattern
                }
                fData.rangePattern = {value.getUnicodeString(status), status};
            }
            /*
            // Note: approximatelyPattern is unused since ICU 69.
            else if (uprv_strcmp(key, "approximately") == 0) {
                if (hasApproxData()) {
                    continue; // have already seen this pattern
                }
                fData.approximatelyPattern = {value.getUnicodeString(status), status};
            }
            */
        }
    }

    bool hasRangeData() {
        return fData.rangePattern.getArgumentLimit() != 0;
    }

    /*
    // Note: approximatelyPattern is unused since ICU 69.
    bool hasApproxData() {
        return fData.approximatelyPattern.getArgumentLimit() != 0;
    }
    */

    bool isComplete() {
        return hasRangeData() /* && hasApproxData() */;
    }

    void fillInDefaults(UErrorCode& status) {
        if (!hasRangeData()) {
            fData.rangePattern = {u"{0}–{1}", status};
        }
        /*
        if (!hasApproxData()) {
            fData.approximatelyPattern = {u"~{0}", status};
        }
        */
    }

  private:
    NumberRangeData& fData;
};

void getNumberRangeData(const char* localeName, const char* nsName, NumberRangeData& data, UErrorCode& status) {
    if (U_FAILURE(status)) { return; }
    LocalUResourceBundlePointer rb(ures_open(nullptr, localeName, &status));
    if (U_FAILURE(status)) { return; }
    NumberRangeDataSink sink(data);

    CharString dataPath;
    dataPath.append("NumberElements/", -1, status);
    dataPath.append(nsName, -1, status);
    dataPath.append("/miscPatterns", -1, status);
    if (U_FAILURE(status)) { return; }

    UErrorCode localStatus = U_ZERO_ERROR;
    ures_getAllItemsWithFallback(rb.getAlias(), dataPath.data(), sink, localStatus);
    if (U_FAILURE(localStatus) && localStatus != U_MISSING_RESOURCE_ERROR) {
        status = localStatus;
        return;
    }

    // Fall back to latn if necessary
    if (!sink.isComplete()) {
        ures_getAllItemsWithFallback(rb.getAlias(), "NumberElements/latn/miscPatterns", sink, status);
    }

    sink.fillInDefaults(status);
}

} // namespace



NumberRangeFormatterImpl::NumberRangeFormatterImpl(const RangeMacroProps& macros, UErrorCode& status)
    : formatterImpl1(macros.formatter1.fMacros, status),
      formatterImpl2(macros.formatter2.fMacros, status),
      fSameFormatters(macros.singleFormatter),
      fCollapse(macros.collapse),
      fIdentityFallback(macros.identityFallback),
      fApproximatelyFormatter(status) {

    const char* nsName = formatterImpl1.getRawMicroProps().nsName;
    if (!fSameFormatters && uprv_strcmp(nsName, formatterImpl2.getRawMicroProps().nsName) != 0) {
        status = U_ILLEGAL_ARGUMENT_ERROR;
        return;
    }

    NumberRangeData data;
    getNumberRangeData(macros.locale.getName(), nsName, data, status);
    if (U_FAILURE(status)) { return; }
    fRangeFormatter = data.rangePattern;

    if (fSameFormatters && (
            fIdentityFallback == UNUM_IDENTITY_FALLBACK_APPROXIMATELY ||
            fIdentityFallback == UNUM_IDENTITY_FALLBACK_APPROXIMATELY_OR_SINGLE_VALUE)) {
        MacroProps approximatelyMacros(macros.formatter1.fMacros);
        approximatelyMacros.approximately = true;
        // Use in-place construction because NumberFormatterImpl has internal self-pointers
        fApproximatelyFormatter.~NumberFormatterImpl();
        new (&fApproximatelyFormatter) NumberFormatterImpl(approximatelyMacros, status);
    }

    // TODO: Get locale from PluralRules instead?
    fPluralRanges = StandardPluralRanges::forLocale(macros.locale, status);
    if (U_FAILURE(status)) { return; }
}

void NumberRangeFormatterImpl::format(UFormattedNumberRangeData& data, bool equalBeforeRounding, UErrorCode& status) const {
    if (U_FAILURE(status)) {
        return;
    }

    MicroProps micros1;
    MicroProps micros2;
    formatterImpl1.preProcess(data.quantity1, micros1, status);
    if (fSameFormatters) {
        formatterImpl1.preProcess(data.quantity2, micros2, status);
    } else {
        formatterImpl2.preProcess(data.quantity2, micros2, status);
    }
    if (U_FAILURE(status)) {
        return;
    }

    // If any of the affixes are different, an identity is not possible
    // and we must use formatRange().
    // TODO: Write this as MicroProps operator==() ?
    // TODO: Avoid the redundancy of these equality operations with the
    // ones in formatRange?
    if (!micros1.modInner->semanticallyEquivalent(*micros2.modInner)
            || !micros1.modMiddle->semanticallyEquivalent(*micros2.modMiddle)
            || !micros1.modOuter->semanticallyEquivalent(*micros2.modOuter)) {
        formatRange(data, micros1, micros2, status);
        data.identityResult = UNUM_IDENTITY_RESULT_NOT_EQUAL;
        return;
    }

    // Check for identity
    if (equalBeforeRounding) {
        data.identityResult = UNUM_IDENTITY_RESULT_EQUAL_BEFORE_ROUNDING;
    } else if (data.quantity1 == data.quantity2) {
        data.identityResult = UNUM_IDENTITY_RESULT_EQUAL_AFTER_ROUNDING;
    } else {
        data.identityResult = UNUM_IDENTITY_RESULT_NOT_EQUAL;
    }

    switch (identity2d(fIdentityFallback, data.identityResult)) {
        case identity2d(UNUM_IDENTITY_FALLBACK_RANGE,
                        UNUM_IDENTITY_RESULT_NOT_EQUAL):
        case identity2d(UNUM_IDENTITY_FALLBACK_RANGE,
                        UNUM_IDENTITY_RESULT_EQUAL_AFTER_ROUNDING):
        case identity2d(UNUM_IDENTITY_FALLBACK_RANGE,
                        UNUM_IDENTITY_RESULT_EQUAL_BEFORE_ROUNDING):
        case identity2d(UNUM_IDENTITY_FALLBACK_APPROXIMATELY,
                        UNUM_IDENTITY_RESULT_NOT_EQUAL):
        case identity2d(UNUM_IDENTITY_FALLBACK_APPROXIMATELY_OR_SINGLE_VALUE,
                        UNUM_IDENTITY_RESULT_NOT_EQUAL):
        case identity2d(UNUM_IDENTITY_FALLBACK_SINGLE_VALUE,
                        UNUM_IDENTITY_RESULT_NOT_EQUAL):
            formatRange(data, micros1, micros2, status);
            break;

        case identity2d(UNUM_IDENTITY_FALLBACK_APPROXIMATELY,
                        UNUM_IDENTITY_RESULT_EQUAL_AFTER_ROUNDING):
        case identity2d(UNUM_IDENTITY_FALLBACK_APPROXIMATELY,
                        UNUM_IDENTITY_RESULT_EQUAL_BEFORE_ROUNDING):
        case identity2d(UNUM_IDENTITY_FALLBACK_APPROXIMATELY_OR_SINGLE_VALUE,
                        UNUM_IDENTITY_RESULT_EQUAL_AFTER_ROUNDING):
            formatApproximately(data, micros1, micros2, status);
            break;

        case identity2d(UNUM_IDENTITY_FALLBACK_APPROXIMATELY_OR_SINGLE_VALUE,
                        UNUM_IDENTITY_RESULT_EQUAL_BEFORE_ROUNDING):
        case identity2d(UNUM_IDENTITY_FALLBACK_SINGLE_VALUE,
                        UNUM_IDENTITY_RESULT_EQUAL_AFTER_ROUNDING):
        case identity2d(UNUM_IDENTITY_FALLBACK_SINGLE_VALUE,
                        UNUM_IDENTITY_RESULT_EQUAL_BEFORE_ROUNDING):
            formatSingleValue(data, micros1, micros2, status);
            break;

        default:
            UPRV_UNREACHABLE_EXIT;
    }
}


void NumberRangeFormatterImpl::formatSingleValue(UFormattedNumberRangeData& data,
                                                 MicroProps& micros1, MicroProps& micros2,
                                                 UErrorCode& status) const {
    if (U_FAILURE(status)) { return; }
    if (fSameFormatters) {
        int32_t length = NumberFormatterImpl::writeNumber(micros1.simple, data.quantity1, data.getStringRef(), 0, status);
        NumberFormatterImpl::writeAffixes(micros1, data.getStringRef(), 0, length, status);
    } else {
        formatRange(data, micros1, micros2, status);
    }
}


void NumberRangeFormatterImpl::formatApproximately (UFormattedNumberRangeData& data,
                                                    MicroProps& micros1, MicroProps& micros2,
                                                    UErrorCode& status) const {
    if (U_FAILURE(status)) { return; }
    if (fSameFormatters) {
        // Re-format using the approximately formatter:
        MicroProps microsAppx;
        data.quantity1.resetExponent();
        fApproximatelyFormatter.preProcess(data.quantity1, microsAppx, status);
        int32_t length = NumberFormatterImpl::writeNumber(microsAppx.simple, data.quantity1, data.getStringRef(), 0, status);
        length += microsAppx.modInner->apply(data.getStringRef(), 0, length, status);
        length += microsAppx.modMiddle->apply(data.getStringRef(), 0, length, status);
        microsAppx.modOuter->apply(data.getStringRef(), 0, length, status);
    } else {
        formatRange(data, micros1, micros2, status);
    }
}


void NumberRangeFormatterImpl::formatRange(UFormattedNumberRangeData& data,
                                           MicroProps& micros1, MicroProps& micros2,
                                           UErrorCode& status) const {
    if (U_FAILURE(status)) { return; }

    // modInner is always notation (scientific); collapsable in ALL.
    // modOuter is always units; collapsable in ALL, AUTO, and UNIT.
    // modMiddle could be either; collapsable in ALL and sometimes AUTO and UNIT.
    // Never collapse an outer mod but not an inner mod.
    bool collapseOuter, collapseMiddle, collapseInner;
    switch (fCollapse) {
        case UNUM_RANGE_COLLAPSE_ALL:
        case UNUM_RANGE_COLLAPSE_AUTO:
        case UNUM_RANGE_COLLAPSE_UNIT:
        {
            // OUTER MODIFIER
            collapseOuter = micros1.modOuter->semanticallyEquivalent(*micros2.modOuter);

            if (!collapseOuter) {
                // Never collapse inner mods if outer mods are not collapsable
                collapseMiddle = false;
                collapseInner = false;
                break;
            }

            // MIDDLE MODIFIER
            collapseMiddle = micros1.modMiddle->semanticallyEquivalent(*micros2.modMiddle);

            if (!collapseMiddle) {
                // Never collapse inner mods if outer mods are not collapsable
                collapseInner = false;
                break;
            }

            // MIDDLE MODIFIER HEURISTICS
            // (could disable collapsing of the middle modifier)
            // The modifiers are equal by this point, so we can look at just one of them.
            const Modifier* mm = micros1.modMiddle;
            if (fCollapse == UNUM_RANGE_COLLAPSE_UNIT) {
                // Only collapse if the modifier is a unit.
                // TODO: Make a better way to check for a unit?
                // TODO: Handle case where the modifier has both notation and unit (compact currency)?
                if (!mm->containsField({UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD})
                        && !mm->containsField({UFIELD_CATEGORY_NUMBER, UNUM_PERCENT_FIELD})) {
                    collapseMiddle = false;
                }
            } else if (fCollapse == UNUM_RANGE_COLLAPSE_AUTO) {
                // Heuristic as of ICU 63: collapse only if the modifier is more than one code point.
                if (mm->getCodePointCount() <= 1) {
                    collapseMiddle = false;
                }
            }

            if (!collapseMiddle || fCollapse != UNUM_RANGE_COLLAPSE_ALL) {
                collapseInner = false;
                break;
            }

            // INNER MODIFIER
            collapseInner = micros1.modInner->semanticallyEquivalent(*micros2.modInner);

            // All done checking for collapsibility.
            break;
        }

        default:
            collapseOuter = false;
            collapseMiddle = false;
            collapseInner = false;
            break;
    }

    FormattedStringBuilder& string = data.getStringRef();
    int32_t lengthPrefix = 0;
    int32_t length1 = 0;
    int32_t lengthInfix = 0;
    int32_t length2 = 0;
    int32_t lengthSuffix = 0;

    // Use #define so that these are evaluated at the call site.
    #define UPRV_INDEX_0 (lengthPrefix)
    #define UPRV_INDEX_1 (lengthPrefix + length1)
    #define UPRV_INDEX_2 (lengthPrefix + length1 + lengthInfix)
    #define UPRV_INDEX_3 (lengthPrefix + length1 + lengthInfix + length2)
    #define UPRV_INDEX_4 (lengthPrefix + length1 + lengthInfix + length2 + lengthSuffix)

    int32_t lengthRange = SimpleModifier::formatTwoArgPattern(
        fRangeFormatter,
        string,
        0,
        &lengthPrefix,
        &lengthSuffix,
        kUndefinedField,
        status);
    if (U_FAILURE(status)) { return; }
    lengthInfix = lengthRange - lengthPrefix - lengthSuffix;
    U_ASSERT(lengthInfix > 0);

    // SPACING HEURISTIC
    // Add spacing unless all modifiers are collapsed.
    // TODO: add API to control this?
    // TODO: Use a data-driven heuristic like currency spacing?
    // TODO: Use Unicode [:whitespace:] instead of PatternProps whitespace? (consider speed implications)
    {
        bool repeatInner = !collapseInner && micros1.modInner->getCodePointCount() > 0;
        bool repeatMiddle = !collapseMiddle && micros1.modMiddle->getCodePointCount() > 0;
        bool repeatOuter = !collapseOuter && micros1.modOuter->getCodePointCount() > 0;
        if (repeatInner || repeatMiddle || repeatOuter) {
            // Add spacing if there is not already spacing
            if (!PatternProps::isWhiteSpace(string.charAt(UPRV_INDEX_1))) {
                lengthInfix += string.insertCodePoint(UPRV_INDEX_1, u'\u0020', kUndefinedField, status);
            }
            if (!PatternProps::isWhiteSpace(string.charAt(UPRV_INDEX_2 - 1))) {
                lengthInfix += string.insertCodePoint(UPRV_INDEX_2, u'\u0020', kUndefinedField, status);
            }
        }
    }

    length1 += NumberFormatterImpl::writeNumber(micros1.simple, data.quantity1, string, UPRV_INDEX_0, status);
    // ICU-21684: Write the second number to a temp string to avoid repeated insert operations
    FormattedStringBuilder tempString;
    NumberFormatterImpl::writeNumber(micros2.simple, data.quantity2, tempString, 0, status);
    length2 += string.insert(UPRV_INDEX_2, tempString, status);

    // TODO: Support padding?

    if (collapseInner) {
        const Modifier& mod = resolveModifierPlurals(*micros1.modInner, *micros2.modInner);
        lengthSuffix += mod.apply(string, UPRV_INDEX_0, UPRV_INDEX_4, status);
        lengthPrefix += mod.getPrefixLength();
        lengthSuffix -= mod.getPrefixLength();
    } else {
        length1 += micros1.modInner->apply(string, UPRV_INDEX_0, UPRV_INDEX_1, status);
        length2 += micros2.modInner->apply(string, UPRV_INDEX_2, UPRV_INDEX_4, status);
    }

    if (collapseMiddle) {
        const Modifier& mod = resolveModifierPlurals(*micros1.modMiddle, *micros2.modMiddle);
        lengthSuffix += mod.apply(string, UPRV_INDEX_0, UPRV_INDEX_4, status);
        lengthPrefix += mod.getPrefixLength();
        lengthSuffix -= mod.getPrefixLength();
    } else {
        length1 += micros1.modMiddle->apply(string, UPRV_INDEX_0, UPRV_INDEX_1, status);
        length2 += micros2.modMiddle->apply(string, UPRV_INDEX_2, UPRV_INDEX_4, status);
    }

    if (collapseOuter) {
        const Modifier& mod = resolveModifierPlurals(*micros1.modOuter, *micros2.modOuter);
        lengthSuffix += mod.apply(string, UPRV_INDEX_0, UPRV_INDEX_4, status);
        lengthPrefix += mod.getPrefixLength();
        lengthSuffix -= mod.getPrefixLength();
    } else {
        length1 += micros1.modOuter->apply(string, UPRV_INDEX_0, UPRV_INDEX_1, status);
        length2 += micros2.modOuter->apply(string, UPRV_INDEX_2, UPRV_INDEX_4, status);
    }

    // Now that all pieces are added, save the span info.
    data.appendSpanInfo(UFIELD_CATEGORY_NUMBER_RANGE_SPAN, 0, UPRV_INDEX_0, length1, status);
    data.appendSpanInfo(UFIELD_CATEGORY_NUMBER_RANGE_SPAN, 1, UPRV_INDEX_2, length2, status);
}


const Modifier&
NumberRangeFormatterImpl::resolveModifierPlurals(const Modifier& first, const Modifier& second) const {
    Modifier::Parameters parameters;
    first.getParameters(parameters);
    if (parameters.obj == nullptr) {
        // No plural form; return a fallback (e.g., the first)
        return first;
    }
    StandardPlural::Form firstPlural = parameters.plural;

    second.getParameters(parameters);
    if (parameters.obj == nullptr) {
        // No plural form; return a fallback (e.g., the first)
        return first;
    }
    StandardPlural::Form secondPlural = parameters.plural;

    // Get the required plural form from data
    StandardPlural::Form resultPlural = fPluralRanges.resolve(firstPlural, secondPlural);

    // Get and return the new Modifier
    const Modifier* mod = parameters.obj->getModifier(parameters.signum, resultPlural);
    U_ASSERT(mod != nullptr);
    return *mod;
}



#endif /* #if !UCONFIG_NO_FORMATTING */