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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2015, International Business Machines Corporation
* and others. All Rights Reserved.
*******************************************************************************
* standardplural.h
*
* created on: 2015dec14
* created by: Markus W. Scherer
*/
#ifndef __STANDARDPLURAL_H__
#define __STANDARDPLURAL_H__
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
U_NAMESPACE_BEGIN
class UnicodeString;
/**
* Standard CLDR plural form/category constants.
* See http://www.unicode.org/reports/tr35/tr35-numbers.html#Language_Plural_Rules
*/
class U_I18N_API StandardPlural {
public:
enum Form {
ZERO,
ONE,
TWO,
FEW,
MANY,
OTHER,
EQ_0,
EQ_1,
COUNT
};
/**
* @return the lowercase CLDR keyword string for the plural form
*/
static const char *getKeyword(Form p);
/**
* @param keyword for example "few" or "other"
* @return the plural form corresponding to the keyword, or OTHER
*/
static Form orOtherFromString(const char *keyword) {
return static_cast<Form>(indexOrOtherIndexFromString(keyword));
}
/**
* @param keyword for example "few" or "other"
* @return the plural form corresponding to the keyword, or OTHER
*/
static Form orOtherFromString(const UnicodeString &keyword) {
return static_cast<Form>(indexOrOtherIndexFromString(keyword));
}
/**
* Sets U_ILLEGAL_ARGUMENT_ERROR if the keyword is not a plural form.
*
* @param keyword for example "few" or "other"
* @return the plural form corresponding to the keyword
*/
static Form fromString(const char *keyword, UErrorCode &errorCode) {
return static_cast<Form>(indexFromString(keyword, errorCode));
}
/**
* Sets U_ILLEGAL_ARGUMENT_ERROR if the keyword is not a plural form.
*
* @param keyword for example "few" or "other"
* @return the plural form corresponding to the keyword
*/
static Form fromString(const UnicodeString &keyword, UErrorCode &errorCode) {
return static_cast<Form>(indexFromString(keyword, errorCode));
}
/**
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword, or a negative value
*/
static int32_t indexOrNegativeFromString(const char *keyword);
/**
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword, or a negative value
*/
static int32_t indexOrNegativeFromString(const UnicodeString &keyword);
/**
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword, or OTHER
*/
static int32_t indexOrOtherIndexFromString(const char *keyword) {
int32_t i = indexOrNegativeFromString(keyword);
return i >= 0 ? i : OTHER;
}
/**
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword, or OTHER
*/
static int32_t indexOrOtherIndexFromString(const UnicodeString &keyword) {
int32_t i = indexOrNegativeFromString(keyword);
return i >= 0 ? i : OTHER;
}
/**
* Sets U_ILLEGAL_ARGUMENT_ERROR if the keyword is not a plural form.
*
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword
*/
static int32_t indexFromString(const char *keyword, UErrorCode &errorCode);
/**
* Sets U_ILLEGAL_ARGUMENT_ERROR if the keyword is not a plural form.
*
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword
*/
static int32_t indexFromString(const UnicodeString &keyword, UErrorCode &errorCode);
};
U_NAMESPACE_END
#endif // !UCONFIG_NO_FORMATTING
#endif // __STANDARDPLURAL_H__
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