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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*****************************************************************************************
+* Copyright (C) 2010-2013, International Business Machines
+* Corporation and others. All Rights Reserved.
+*****************************************************************************************
+*/
+
+#ifndef UPLURALRULES_H
+#define UPLURALRULES_H
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/localpointer.h"
+
+/**
+ * \file
+ * \brief C API: Plural rules, select plural keywords for numeric values.
+ *
+ * A UPluralRules object defines rules for mapping non-negative numeric
+ * values onto a small set of keywords. Rules are constructed from a text
+ * description, consisting of a series of keywords and conditions.
+ * The uplrules_select function examines each condition in order and
+ * returns the keyword for the first condition that matches the number.
+ * If none match, the default rule(other) is returned.
+ *
+ * For more information, see the LDML spec, C.11 Language Plural Rules:
+ * http://www.unicode.org/reports/tr35/#Language_Plural_Rules
+ *
+ * Keywords: ICU locale data has 6 predefined values -
+ * 'zero', 'one', 'two', 'few', 'many' and 'other'. Callers need to check
+ * the value of keyword returned by the uplrules_select function.
+ *
+ * These are based on CLDR <i>Language Plural Rules</i>. For these
+ * predefined rules, see the CLDR page at
+ * http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
+ */
+
+/**
+ * Type of plurals and PluralRules.
+ * @stable ICU 50
+ */
+enum UPluralType {
+    /**
+     * Plural rules for cardinal numbers: 1 file vs. 2 files.
+     * @stable ICU 50
+     */
+    UPLURAL_TYPE_CARDINAL,
+    /**
+     * Plural rules for ordinal numbers: 1st file, 2nd file, 3rd file, 4th file, etc.
+     * @stable ICU 50
+     */
+    UPLURAL_TYPE_ORDINAL,
+#ifndef U_HIDE_DEPRECATED_API
+    /**
+     * One more than the highest normal UPluralType value.
+     * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
+     */
+    UPLURAL_TYPE_COUNT
+#endif  // U_HIDE_DEPRECATED_API
+};
+/**
+ * @stable ICU 50
+ */
+typedef enum UPluralType UPluralType;
+
+/**
+ * Opaque UPluralRules object for use in C programs.
+ * @stable ICU 4.8
+ */
+struct UPluralRules;
+typedef struct UPluralRules UPluralRules;  /**< C typedef for struct UPluralRules. @stable ICU 4.8 */
+
+/**
+ * Opens a new UPluralRules object using the predefined cardinal-number plural rules for a
+ * given locale.
+ * Same as uplrules_openForType(locale, UPLURAL_TYPE_CARDINAL, status).
+ * @param locale The locale for which the rules are desired.
+ * @param status A pointer to a UErrorCode to receive any errors.
+ * @return A UPluralRules for the specified locale, or NULL if an error occurred.
+ * @stable ICU 4.8
+ */
+U_STABLE UPluralRules* U_EXPORT2
+uplrules_open(const char *locale, UErrorCode *status);
+
+/**
+ * Opens a new UPluralRules object using the predefined plural rules for a
+ * given locale and the plural type.
+ * @param locale The locale for which the rules are desired.
+ * @param type The plural type (e.g., cardinal or ordinal).
+ * @param status A pointer to a UErrorCode to receive any errors.
+ * @return A UPluralRules for the specified locale, or NULL if an error occurred.
+ * @stable ICU 50
+ */
+U_DRAFT UPluralRules* U_EXPORT2
+uplrules_openForType(const char *locale, UPluralType type, UErrorCode *status);
+
+/**
+ * Closes a UPluralRules object. Once closed it may no longer be used.
+ * @param uplrules The UPluralRules object to close.
+ * @stable ICU 4.8
+ */
+U_STABLE void U_EXPORT2
+uplrules_close(UPluralRules *uplrules);
+
+
+#if U_SHOW_CPLUSPLUS_API
+
+U_NAMESPACE_BEGIN
+
+/**
+ * \class LocalUPluralRulesPointer
+ * "Smart pointer" class, closes a UPluralRules via uplrules_close().
+ * For most methods see the LocalPointerBase base class.
+ *
+ * @see LocalPointerBase
+ * @see LocalPointer
+ * @stable ICU 4.8
+ */
+U_DEFINE_LOCAL_OPEN_POINTER(LocalUPluralRulesPointer, UPluralRules, uplrules_close);
+
+U_NAMESPACE_END
+
+#endif
+
+
+/**
+ * Given a number, returns the keyword of the first rule that
+ * applies to the number, according to the supplied UPluralRules object.
+ * @param uplrules The UPluralRules object specifying the rules.
+ * @param number The number for which the rule has to be determined.
+ * @param keyword The keyword of the rule that applies to number.
+ * @param capacity The capacity of keyword.
+ * @param status A pointer to a UErrorCode to receive any errors.
+ * @return The length of keyword.
+ * @stable ICU 4.8
+ */
+U_STABLE int32_t U_EXPORT2
+uplrules_select(const UPluralRules *uplrules,
+               double number,
+               UChar *keyword, int32_t capacity,
+               UErrorCode *status);
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+#endif