1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 *****************************************************************************************
5 * Copyright (C) 2010-2012, International Business Machines
6 * Corporation and others. All Rights Reserved.
7 *****************************************************************************************
8 */
9
10 #include "unicode/utypes.h"
11
12 #if !UCONFIG_NO_FORMATTING
13
14 #include "unicode/upluralrules.h"
15 #include "unicode/plurrule.h"
16 #include "unicode/locid.h"
17 #include "unicode/unistr.h"
18 #include "unicode/unum.h"
19 #include "unicode/numfmt.h"
20 #include "number_decimalquantity.h"
21
22 U_NAMESPACE_USE
23
24 namespace {
25
26 /**
27 * Given a number and a format, returns the keyword of the first applicable
28 * rule for the PluralRules object.
29 * @param rules The plural rules.
30 * @param obj The numeric object for which the rule should be determined.
31 * @param fmt The NumberFormat specifying how the number will be formatted
32 * (this can affect the plural form, e.g. "1 dollar" vs "1.0 dollars").
33 * @param status Input/output parameter. If at entry this indicates a
34 * failure status, the method returns immediately; otherwise
35 * this is set to indicate the outcome of the call.
36 * @return The keyword of the selected rule. Undefined in the case of an error.
37 */
select(const PluralRules & rules,const Formattable & obj,const NumberFormat & fmt,UErrorCode & status)38 UnicodeString select(const PluralRules &rules, const Formattable& obj, const NumberFormat& fmt, UErrorCode& status) {
39 if (U_SUCCESS(status)) {
40 const DecimalFormat *decFmt = dynamic_cast<const DecimalFormat *>(&fmt);
41 if (decFmt != NULL) {
42 number::impl::DecimalQuantity dq;
43 decFmt->formatToDecimalQuantity(obj, dq, status);
44 if (U_SUCCESS(status)) {
45 return rules.select(dq);
46 }
47 } else {
48 double number = obj.getDouble(status);
49 if (U_SUCCESS(status)) {
50 return rules.select(number);
51 }
52 }
53 }
54 return UnicodeString();
55 }
56
57 } // namespace
58
59 U_CAPI UPluralRules* U_EXPORT2
uplrules_open(const char * locale,UErrorCode * status)60 uplrules_open(const char *locale, UErrorCode *status)
61 {
62 return uplrules_openForType(locale, UPLURAL_TYPE_CARDINAL, status);
63 }
64
65 U_CAPI UPluralRules* U_EXPORT2
uplrules_openForType(const char * locale,UPluralType type,UErrorCode * status)66 uplrules_openForType(const char *locale, UPluralType type, UErrorCode *status)
67 {
68 return (UPluralRules*)PluralRules::forLocale(Locale(locale), type, *status);
69 }
70
71 U_CAPI void U_EXPORT2
uplrules_close(UPluralRules * uplrules)72 uplrules_close(UPluralRules *uplrules)
73 {
74 delete (PluralRules*)uplrules;
75 }
76
77 U_CAPI int32_t U_EXPORT2
uplrules_select(const UPluralRules * uplrules,double number,UChar * keyword,int32_t capacity,UErrorCode * status)78 uplrules_select(const UPluralRules *uplrules,
79 double number,
80 UChar *keyword, int32_t capacity,
81 UErrorCode *status)
82 {
83 if (U_FAILURE(*status)) {
84 return 0;
85 }
86 if (keyword == NULL ? capacity != 0 : capacity < 0) {
87 *status = U_ILLEGAL_ARGUMENT_ERROR;
88 return 0;
89 }
90 UnicodeString result = ((PluralRules*)uplrules)->select(number);
91 return result.extract(keyword, capacity, *status);
92 }
93
94 U_CAPI int32_t U_EXPORT2
uplrules_selectWithFormat(const UPluralRules * uplrules,double number,const UNumberFormat * fmt,UChar * keyword,int32_t capacity,UErrorCode * status)95 uplrules_selectWithFormat(const UPluralRules *uplrules,
96 double number,
97 const UNumberFormat *fmt,
98 UChar *keyword, int32_t capacity,
99 UErrorCode *status)
100 {
101 if (U_FAILURE(*status)) {
102 return 0;
103 }
104 const PluralRules* plrules = reinterpret_cast<const PluralRules*>(uplrules);
105 const NumberFormat* nf = reinterpret_cast<const NumberFormat*>(fmt);
106 if (plrules == NULL || nf == NULL || ((keyword == NULL)? capacity != 0 : capacity < 0)) {
107 *status = U_ILLEGAL_ARGUMENT_ERROR;
108 return 0;
109 }
110 Formattable obj(number);
111 UnicodeString result = select(*plrules, obj, *nf, *status);
112 return result.extract(keyword, capacity, *status);
113 }
114
115 U_CAPI UEnumeration* U_EXPORT2
uplrules_getKeywords(const UPluralRules * uplrules,UErrorCode * status)116 uplrules_getKeywords(const UPluralRules *uplrules,
117 UErrorCode *status)
118 {
119 if (U_FAILURE(*status)) {
120 return NULL;
121 }
122 const PluralRules* plrules = reinterpret_cast<const PluralRules*>(uplrules);
123 if (plrules == NULL) {
124 *status = U_ILLEGAL_ARGUMENT_ERROR;
125 return NULL;
126 }
127 StringEnumeration *senum = plrules->getKeywords(*status);
128 if (U_FAILURE(*status)) {
129 return NULL;
130 }
131 if (senum == NULL) {
132 *status = U_MEMORY_ALLOCATION_ERROR;
133 return NULL;
134 }
135 return uenum_openFromStringEnumeration(senum, status);
136 }
137
138 #endif /* #if !UCONFIG_NO_FORMATTING */
139