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(UNumberGroupingStrategy grouping)37 Grouper Grouper::forStrategy(UNumberGroupingStrategy 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 UPRV_UNREACHABLE;
51 }
52 }
53
forProperties(const DecimalFormatProperties & properties)54 Grouper Grouper::forProperties(const DecimalFormatProperties& properties) {
55 if (!properties.groupingUsed) {
56 return forStrategy(UNUM_GROUPING_OFF);
57 }
58 auto grouping1 = static_cast<int16_t>(properties.groupingSize);
59 auto grouping2 = static_cast<int16_t>(properties.secondaryGroupingSize);
60 auto minGrouping = static_cast<int16_t>(properties.minimumGroupingDigits);
61 grouping1 = grouping1 > 0 ? grouping1 : grouping2 > 0 ? grouping2 : grouping1;
62 grouping2 = grouping2 > 0 ? grouping2 : grouping1;
63 return {grouping1, grouping2, minGrouping, UNUM_GROUPING_COUNT};
64 }
65
setLocaleData(const impl::ParsedPatternInfo & patternInfo,const Locale & locale)66 void Grouper::setLocaleData(const impl::ParsedPatternInfo &patternInfo, const Locale& locale) {
67 if (fMinGrouping == -2) {
68 fMinGrouping = getMinGroupingForLocale(locale);
69 } else if (fMinGrouping == -3) {
70 fMinGrouping = static_cast<int16_t>(uprv_max(2, getMinGroupingForLocale(locale)));
71 } else {
72 // leave fMinGrouping alone
73 }
74 if (fGrouping1 != -2 && fGrouping2 != -4) {
75 return;
76 }
77 auto grouping1 = static_cast<int16_t> (patternInfo.positive.groupingSizes & 0xffff);
78 auto grouping2 = static_cast<int16_t> ((patternInfo.positive.groupingSizes >> 16) & 0xffff);
79 auto grouping3 = static_cast<int16_t> ((patternInfo.positive.groupingSizes >> 32) & 0xffff);
80 if (grouping2 == -1) {
81 grouping1 = fGrouping1 == -4 ? (short) 3 : (short) -1;
82 }
83 if (grouping3 == -1) {
84 grouping2 = grouping1;
85 }
86 fGrouping1 = grouping1;
87 fGrouping2 = grouping2;
88 }
89
groupAtPosition(int32_t position,const impl::DecimalQuantity & value) const90 bool Grouper::groupAtPosition(int32_t position, const impl::DecimalQuantity &value) const {
91 U_ASSERT(fGrouping1 > -2);
92 if (fGrouping1 == -1 || fGrouping1 == 0) {
93 // Either -1 or 0 means "no grouping"
94 return false;
95 }
96 position -= fGrouping1;
97 return position >= 0 && (position % fGrouping2) == 0
98 && value.getUpperDisplayMagnitude() - fGrouping1 + 1 >= fMinGrouping;
99 }
100
getPrimary() const101 int16_t Grouper::getPrimary() const {
102 return fGrouping1;
103 }
104
getSecondary() const105 int16_t Grouper::getSecondary() const {
106 return fGrouping2;
107 }
108
109 #endif /* #if !UCONFIG_NO_FORMATTING */
110