1 files changed, 182 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/upluralrules.cpp b/intl/icu/source/i18n/upluralrules.cpp
new file mode 100644
index 0000000000..9c47312811
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+++ b/intl/icu/source/i18n/upluralrules.cpp
@@ -0,0 +1,182 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*****************************************************************************************
+* Copyright (C) 2010-2012, International Business Machines
+* Corporation and others. All Rights Reserved.
+*****************************************************************************************
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/upluralrules.h"
+#include "unicode/plurrule.h"
+#include "unicode/locid.h"
+#include "unicode/unistr.h"
+#include "unicode/unum.h"
+#include "unicode/numfmt.h"
+#include "unicode/unumberformatter.h"
+#include "number_decimalquantity.h"
+#include "number_utypes.h"
+#include "numrange_impl.h"
+
+U_NAMESPACE_USE
+
+namespace {
+
+/**
+ * Given a number and a format, returns the keyword of the first applicable
+ * rule for the PluralRules object.
+ * @param rules The plural rules.
+ * @param obj The numeric object for which the rule should be determined.
+ * @param fmt The NumberFormat specifying how the number will be formatted
+ *        (this can affect the plural form, e.g. "1 dollar" vs "1.0 dollars").
+ * @param status  Input/output parameter. If at entry this indicates a
+ *                failure status, the method returns immediately; otherwise
+ *                this is set to indicate the outcome of the call.
+ * @return The keyword of the selected rule. Undefined in the case of an error.
+ */
+UnicodeString select(const PluralRules &rules, const Formattable& obj, const NumberFormat& fmt, UErrorCode& status) {
+    if (U_SUCCESS(status)) {
+        const DecimalFormat *decFmt = dynamic_cast<const DecimalFormat *>(&fmt);
+        if (decFmt != nullptr) {
+            number::impl::DecimalQuantity dq;
+            decFmt->formatToDecimalQuantity(obj, dq, status);
+            if (U_SUCCESS(status)) {
+                return rules.select(dq);
+            }
+        } else {
+            double number = obj.getDouble(status);
+            if (U_SUCCESS(status)) {
+                return rules.select(number);
+            }
+        }
+    }
+    return UnicodeString();
+}
+
+}  // namespace
+
+U_CAPI UPluralRules* U_EXPORT2
+uplrules_open(const char *locale, UErrorCode *status)
+{
+    return uplrules_openForType(locale, UPLURAL_TYPE_CARDINAL, status);
+}
+
+U_CAPI UPluralRules* U_EXPORT2
+uplrules_openForType(const char *locale, UPluralType type, UErrorCode *status)
+{
+    return (UPluralRules*)PluralRules::forLocale(Locale(locale), type, *status);
+}
+
+U_CAPI void U_EXPORT2
+uplrules_close(UPluralRules *uplrules)
+{
+    delete (PluralRules*)uplrules;
+}
+
+U_CAPI int32_t U_EXPORT2
+uplrules_select(const UPluralRules *uplrules,
+                double number,
+                char16_t *keyword, int32_t capacity,
+                UErrorCode *status)
+{
+    if (U_FAILURE(*status)) {
+        return 0;
+    }
+    if (keyword == nullptr ? capacity != 0 : capacity < 0) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return 0;
+    }
+    UnicodeString result = ((PluralRules*)uplrules)->select(number);
+    return result.extract(keyword, capacity, *status);
+}
+
+U_CAPI int32_t U_EXPORT2
+uplrules_selectFormatted(const UPluralRules *uplrules,
+                const UFormattedNumber* number,
+                char16_t *keyword, int32_t capacity,
+                UErrorCode *status)
+{
+    if (U_FAILURE(*status)) {
+        return 0;
+    }
+    if (keyword == nullptr ? capacity != 0 : capacity < 0) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return 0;
+    }
+    const number::impl::DecimalQuantity* dq =
+        number::impl::validateUFormattedNumberToDecimalQuantity(number, *status);
+    if (U_FAILURE(*status)) {
+        return 0;
+    }
+    UnicodeString result = ((PluralRules*)uplrules)->select(*dq);
+    return result.extract(keyword, capacity, *status);
+}
+
+U_CAPI int32_t U_EXPORT2
+uplrules_selectForRange(const UPluralRules *uplrules,
+                const UFormattedNumberRange* urange,
+                char16_t *keyword, int32_t capacity,
+                UErrorCode *status)
+{
+    if (U_FAILURE(*status)) {
+        return 0;
+    }
+    if (keyword == nullptr ? capacity != 0 : capacity < 0) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return 0;
+    }
+    const number::impl::UFormattedNumberRangeData* impl =
+        number::impl::validateUFormattedNumberRange(urange, *status);
+    UnicodeString result = ((PluralRules*)uplrules)->select(impl, *status);
+    return result.extract(keyword, capacity, *status);
+}
+
+U_CAPI int32_t U_EXPORT2
+uplrules_selectWithFormat(const UPluralRules *uplrules,
+                          double number,
+                          const UNumberFormat *fmt,
+                          char16_t *keyword, int32_t capacity,
+                          UErrorCode *status)
+{
+    if (U_FAILURE(*status)) {
+        return 0;
+    }
+    const PluralRules* plrules = reinterpret_cast<const PluralRules*>(uplrules);
+    const NumberFormat* nf = reinterpret_cast<const NumberFormat*>(fmt);
+    if (plrules == nullptr || nf == nullptr || ((keyword == nullptr)? capacity != 0 : capacity < 0)) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return 0;
+    }
+    Formattable obj(number);
+    UnicodeString result = select(*plrules, obj, *nf, *status);
+    return result.extract(keyword, capacity, *status);
+}
+
+U_CAPI UEnumeration* U_EXPORT2
+uplrules_getKeywords(const UPluralRules *uplrules,
+                     UErrorCode *status)
+{
+    if (U_FAILURE(*status)) {
+        return nullptr;
+    }
+    const PluralRules* plrules = reinterpret_cast<const PluralRules*>(uplrules);
+    if (plrules == nullptr) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return nullptr;
+    }
+    StringEnumeration *senum = plrules->getKeywords(*status);
+    if (U_FAILURE(*status)) {
+        return nullptr;
+    }
+    if (senum == nullptr) {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        return nullptr;
+    }
+    return uenum_openFromStringEnumeration(senum, status);
+}
+
+#endif /* #if !UCONFIG_NO_FORMATTING */