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1 // © 2017 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 
4 #include "unicode/utypes.h"
5 
6 #if !UCONFIG_NO_FORMATTING
7 
8 #include "unicode/numberformatter.h"
9 #include "number_patternstring.h"
10 #include "uresimp.h"
11 
12 using namespace icu;
13 using namespace icu::number;
14 using namespace icu::number::impl;
15 
16 namespace {
17 
getMinGroupingForLocale(const Locale & locale)18 int16_t getMinGroupingForLocale(const Locale& locale) {
19     // TODO: Cache this?
20     UErrorCode localStatus = U_ZERO_ERROR;
21     LocalUResourceBundlePointer bundle(ures_open(NULL, locale.getName(), &localStatus));
22     int32_t resultLen = 0;
23     const char16_t* result = ures_getStringByKeyWithFallback(
24         bundle.getAlias(),
25         "NumberElements/minimumGroupingDigits",
26         &resultLen,
27         &localStatus);
28     // TODO: Is it safe to assume resultLen == 1? Would locales set minGrouping >= 10?
29     if (U_FAILURE(localStatus) || resultLen != 1) {
30         return 1;
31     }
32     return result[0] - u'0';
33 }
34 
35 }
36 
forStrategy(UGroupingStrategy grouping)37 Grouper Grouper::forStrategy(UGroupingStrategy grouping) {
38     switch (grouping) {
39     case UNUM_GROUPING_OFF:
40         return {-1, -1, -2, grouping};
41     case UNUM_GROUPING_AUTO:
42         return {-2, -2, -2, grouping};
43     case UNUM_GROUPING_MIN2:
44         return {-2, -2, -3, grouping};
45     case UNUM_GROUPING_ON_ALIGNED:
46         return {-4, -4, 1, grouping};
47     case UNUM_GROUPING_THOUSANDS:
48         return {3, 3, 1, grouping};
49     default:
50         U_ASSERT(FALSE);
51         return {}; // return a value: silence compiler warning
52     }
53 }
54 
forProperties(const DecimalFormatProperties & properties)55 Grouper Grouper::forProperties(const DecimalFormatProperties& properties) {
56     if (!properties.groupingUsed) {
57         return forStrategy(UNUM_GROUPING_OFF);
58     }
59     auto grouping1 = static_cast<int16_t>(properties.groupingSize);
60     auto grouping2 = static_cast<int16_t>(properties.secondaryGroupingSize);
61     auto minGrouping = static_cast<int16_t>(properties.minimumGroupingDigits);
62     grouping1 = grouping1 > 0 ? grouping1 : grouping2 > 0 ? grouping2 : grouping1;
63     grouping2 = grouping2 > 0 ? grouping2 : grouping1;
64     return {grouping1, grouping2, minGrouping, UNUM_GROUPING_COUNT};
65 }
66 
setLocaleData(const impl::ParsedPatternInfo & patternInfo,const Locale & locale)67 void Grouper::setLocaleData(const impl::ParsedPatternInfo &patternInfo, const Locale& locale) {
68     if (fGrouping1 != -2 && fGrouping2 != -4) {
69         return;
70     }
71     auto grouping1 = static_cast<int16_t> (patternInfo.positive.groupingSizes & 0xffff);
72     auto grouping2 = static_cast<int16_t> ((patternInfo.positive.groupingSizes >> 16) & 0xffff);
73     auto grouping3 = static_cast<int16_t> ((patternInfo.positive.groupingSizes >> 32) & 0xffff);
74     if (grouping2 == -1) {
75         grouping1 = fGrouping1 == -4 ? (short) 3 : (short) -1;
76     }
77     if (grouping3 == -1) {
78         grouping2 = grouping1;
79     }
80     if (fMinGrouping == -2) {
81         fMinGrouping = getMinGroupingForLocale(locale);
82     } else if (fMinGrouping == -3) {
83         fMinGrouping = static_cast<int16_t>(uprv_max(2, getMinGroupingForLocale(locale)));
84     } else {
85         // leave fMinGrouping alone
86     }
87     fGrouping1 = grouping1;
88     fGrouping2 = grouping2;
89 }
90 
groupAtPosition(int32_t position,const impl::DecimalQuantity & value) const91 bool Grouper::groupAtPosition(int32_t position, const impl::DecimalQuantity &value) const {
92     U_ASSERT(fGrouping1 > -2);
93     if (fGrouping1 == -1 || fGrouping1 == 0) {
94         // Either -1 or 0 means "no grouping"
95         return false;
96     }
97     position -= fGrouping1;
98     return position >= 0 && (position % fGrouping2) == 0
99            && value.getUpperDisplayMagnitude() - fGrouping1 + 1 >= fMinGrouping;
100 }
101 
getPrimary() const102 int16_t Grouper::getPrimary() const {
103     return fGrouping1;
104 }
105 
getSecondary() const106 int16_t Grouper::getSecondary() const {
107     return fGrouping2;
108 }
109 
110 #endif /* #if !UCONFIG_NO_FORMATTING */
111