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