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-rw-r--r-- | intl/icu/source/i18n/standardplural.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/standardplural.h b/intl/icu/source/i18n/standardplural.h new file mode 100644 index 0000000000..16593065c8 --- /dev/null +++ b/intl/icu/source/i18n/standardplural.h @@ -0,0 +1,134 @@ +// © 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__ |