146 lines
4.5 KiB
C
146 lines
4.5 KiB
C
/*
|
|
*****************************************************************************************
|
|
* Copyright (C) 2010-2012, 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.
|
|
* @draft ICU 50
|
|
*/
|
|
enum UPluralType {
|
|
/**
|
|
* Plural rules for cardinal numbers: 1 file vs. 2 files.
|
|
* @draft ICU 50
|
|
*/
|
|
UPLURAL_TYPE_CARDINAL,
|
|
/**
|
|
* Plural rules for ordinal numbers: 1st file, 2nd file, 3rd file, 4th file, etc.
|
|
* @draft ICU 50
|
|
*/
|
|
UPLURAL_TYPE_ORDINAL,
|
|
/**
|
|
* Number of Plural rules types.
|
|
* @draft ICU 50
|
|
*/
|
|
UPLURAL_TYPE_COUNT
|
|
};
|
|
/**
|
|
* @draft 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.
|
|
* @draft 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
|