/src/mozilla-central/intl/icu/source/i18n/upluralrules.cpp
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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 | | */ |
38 | 0 | UnicodeString select(const PluralRules &rules, const Formattable& obj, const NumberFormat& fmt, UErrorCode& status) { |
39 | 0 | if (U_SUCCESS(status)) { |
40 | 0 | const DecimalFormat *decFmt = dynamic_cast<const DecimalFormat *>(&fmt); |
41 | 0 | if (decFmt != NULL) { |
42 | 0 | number::impl::DecimalQuantity dq; |
43 | 0 | decFmt->formatToDecimalQuantity(obj, dq, status); |
44 | 0 | if (U_SUCCESS(status)) { |
45 | 0 | return rules.select(dq); |
46 | 0 | } |
47 | 0 | } else { |
48 | 0 | double number = obj.getDouble(status); |
49 | 0 | if (U_SUCCESS(status)) { |
50 | 0 | return rules.select(number); |
51 | 0 | } |
52 | 0 | } |
53 | 0 | } |
54 | 0 | return UnicodeString(); |
55 | 0 | } |
56 | | |
57 | | } // namespace |
58 | | |
59 | | U_CAPI UPluralRules* U_EXPORT2 |
60 | | uplrules_open(const char *locale, UErrorCode *status) |
61 | 0 | { |
62 | 0 | return uplrules_openForType(locale, UPLURAL_TYPE_CARDINAL, status); |
63 | 0 | } |
64 | | |
65 | | U_CAPI UPluralRules* U_EXPORT2 |
66 | | uplrules_openForType(const char *locale, UPluralType type, UErrorCode *status) |
67 | 0 | { |
68 | 0 | return (UPluralRules*)PluralRules::forLocale(Locale(locale), type, *status); |
69 | 0 | } |
70 | | |
71 | | U_CAPI void U_EXPORT2 |
72 | | uplrules_close(UPluralRules *uplrules) |
73 | 0 | { |
74 | 0 | delete (PluralRules*)uplrules; |
75 | 0 | } |
76 | | |
77 | | U_CAPI int32_t U_EXPORT2 |
78 | | uplrules_select(const UPluralRules *uplrules, |
79 | | double number, |
80 | | UChar *keyword, int32_t capacity, |
81 | | UErrorCode *status) |
82 | 0 | { |
83 | 0 | if (U_FAILURE(*status)) { |
84 | 0 | return 0; |
85 | 0 | } |
86 | 0 | if (keyword == NULL ? capacity != 0 : capacity < 0) { |
87 | 0 | *status = U_ILLEGAL_ARGUMENT_ERROR; |
88 | 0 | return 0; |
89 | 0 | } |
90 | 0 | UnicodeString result = ((PluralRules*)uplrules)->select(number); |
91 | 0 | return result.extract(keyword, capacity, *status); |
92 | 0 | } |
93 | | |
94 | | U_CAPI int32_t U_EXPORT2 |
95 | | uplrules_selectWithFormat(const UPluralRules *uplrules, |
96 | | double number, |
97 | | const UNumberFormat *fmt, |
98 | | UChar *keyword, int32_t capacity, |
99 | | UErrorCode *status) |
100 | 0 | { |
101 | 0 | if (U_FAILURE(*status)) { |
102 | 0 | return 0; |
103 | 0 | } |
104 | 0 | const PluralRules* plrules = reinterpret_cast<const PluralRules*>(uplrules); |
105 | 0 | const NumberFormat* nf = reinterpret_cast<const NumberFormat*>(fmt); |
106 | 0 | if (plrules == NULL || nf == NULL || ((keyword == NULL)? capacity != 0 : capacity < 0)) { |
107 | 0 | *status = U_ILLEGAL_ARGUMENT_ERROR; |
108 | 0 | return 0; |
109 | 0 | } |
110 | 0 | Formattable obj(number); |
111 | 0 | UnicodeString result = select(*plrules, obj, *nf, *status); |
112 | 0 | return result.extract(keyword, capacity, *status); |
113 | 0 | } |
114 | | |
115 | | U_CAPI UEnumeration* U_EXPORT2 |
116 | | uplrules_getKeywords(const UPluralRules *uplrules, |
117 | | UErrorCode *status) |
118 | 0 | { |
119 | 0 | if (U_FAILURE(*status)) { |
120 | 0 | return NULL; |
121 | 0 | } |
122 | 0 | const PluralRules* plrules = reinterpret_cast<const PluralRules*>(uplrules); |
123 | 0 | if (plrules == NULL) { |
124 | 0 | *status = U_ILLEGAL_ARGUMENT_ERROR; |
125 | 0 | return NULL; |
126 | 0 | } |
127 | 0 | StringEnumeration *senum = plrules->getKeywords(*status); |
128 | 0 | if (U_FAILURE(*status)) { |
129 | 0 | return NULL; |
130 | 0 | } |
131 | 0 | if (senum == NULL) { |
132 | 0 | *status = U_MEMORY_ALLOCATION_ERROR; |
133 | 0 | return NULL; |
134 | 0 | } |
135 | 0 | return uenum_openFromStringEnumeration(senum, status); |
136 | 0 | } |
137 | | |
138 | | #endif /* #if !UCONFIG_NO_FORMATTING */ |