mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
172 lines
7.1 KiB
172 lines
7.1 KiB
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
*****************************************************************************************
|
|
* Copyright (C) 2013-2014, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
*****************************************************************************************
|
|
*/
|
|
|
|
#ifndef UNUMSYS_H
|
|
#define UNUMSYS_H
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
#if !UCONFIG_NO_FORMATTING
|
|
|
|
#include "unicode/uenum.h"
|
|
#include "unicode/localpointer.h"
|
|
|
|
/**
|
|
* \file
|
|
* \brief C API: UNumberingSystem, information about numbering systems
|
|
*
|
|
* Defines numbering systems. A numbering system describes the scheme by which
|
|
* numbers are to be presented to the end user. In its simplest form, a numbering
|
|
* system describes the set of digit characters that are to be used to display
|
|
* numbers, such as Western digits, Thai digits, Arabic-Indic digits, etc., in a
|
|
* positional numbering system with a specified radix (typically 10).
|
|
* More complicated numbering systems are algorithmic in nature, and require use
|
|
* of an RBNF formatter (rule based number formatter), in order to calculate
|
|
* the characters to be displayed for a given number. Examples of algorithmic
|
|
* numbering systems include Roman numerals, Chinese numerals, and Hebrew numerals.
|
|
* Formatting rules for many commonly used numbering systems are included in
|
|
* the ICU package, based on the numbering system rules defined in CLDR.
|
|
* Alternate numbering systems can be specified to a locale by using the
|
|
* numbers locale keyword.
|
|
*/
|
|
|
|
/**
|
|
* Opaque UNumberingSystem object for use in C programs.
|
|
* @stable ICU 52
|
|
*/
|
|
struct UNumberingSystem;
|
|
typedef struct UNumberingSystem UNumberingSystem; /**< C typedef for struct UNumberingSystem. @stable ICU 52 */
|
|
|
|
/**
|
|
* Opens a UNumberingSystem object using the default numbering system for the specified
|
|
* locale.
|
|
* @param locale The locale for which the default numbering system should be opened.
|
|
* @param status A pointer to a UErrorCode to receive any errors. For example, this
|
|
* may be U_UNSUPPORTED_ERROR for a locale such as "en@numbers=xyz" that
|
|
* specifies a numbering system unknown to ICU.
|
|
* @return A UNumberingSystem for the specified locale, or NULL if an error
|
|
* occurred.
|
|
* @stable ICU 52
|
|
*/
|
|
U_STABLE UNumberingSystem * U_EXPORT2
|
|
unumsys_open(const char *locale, UErrorCode *status);
|
|
|
|
/**
|
|
* Opens a UNumberingSystem object using the name of one of the predefined numbering
|
|
* systems specified by CLDR and known to ICU, such as "latn", "arabext", or "hanidec";
|
|
* the full list is returned by unumsys_openAvailableNames. Note that some of the names
|
|
* listed at http://unicode.org/repos/cldr/tags/latest/common/bcp47/number.xml - e.g.
|
|
* default, native, traditional, finance - do not identify specific numbering systems,
|
|
* but rather key values that may only be used as part of a locale, which in turn
|
|
* defines how they are mapped to a specific numbering system such as "latn" or "hant".
|
|
*
|
|
* @param name The name of the numbering system for which a UNumberingSystem object
|
|
* should be opened.
|
|
* @param status A pointer to a UErrorCode to receive any errors. For example, this
|
|
* may be U_UNSUPPORTED_ERROR for a numbering system such as "xyz" that
|
|
* is unknown to ICU.
|
|
* @return A UNumberingSystem for the specified name, or NULL if an error
|
|
* occurred.
|
|
* @stable ICU 52
|
|
*/
|
|
U_STABLE UNumberingSystem * U_EXPORT2
|
|
unumsys_openByName(const char *name, UErrorCode *status);
|
|
|
|
/**
|
|
* Close a UNumberingSystem object. Once closed it may no longer be used.
|
|
* @param unumsys The UNumberingSystem object to close.
|
|
* @stable ICU 52
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
unumsys_close(UNumberingSystem *unumsys);
|
|
|
|
#if U_SHOW_CPLUSPLUS_API
|
|
U_NAMESPACE_BEGIN
|
|
|
|
/**
|
|
* \class LocalUNumberingSystemPointer
|
|
* "Smart pointer" class, closes a UNumberingSystem via unumsys_close().
|
|
* For most methods see the LocalPointerBase base class.
|
|
* @see LocalPointerBase
|
|
* @see LocalPointer
|
|
* @stable ICU 52
|
|
*/
|
|
U_DEFINE_LOCAL_OPEN_POINTER(LocalUNumberingSystemPointer, UNumberingSystem, unumsys_close);
|
|
|
|
U_NAMESPACE_END
|
|
#endif
|
|
|
|
/**
|
|
* Returns an enumeration over the names of all of the predefined numbering systems known
|
|
* to ICU.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @return A pointer to a UEnumeration that must be closed with uenum_close(),
|
|
* or NULL if an error occurred.
|
|
* @stable ICU 52
|
|
*/
|
|
U_STABLE UEnumeration * U_EXPORT2
|
|
unumsys_openAvailableNames(UErrorCode *status);
|
|
|
|
/**
|
|
* Returns the name of the specified UNumberingSystem object (if it is one of the
|
|
* predefined names known to ICU).
|
|
* @param unumsys The UNumberingSystem whose name is desired.
|
|
* @return A pointer to the name of the specified UNumberingSystem object, or
|
|
* NULL if the name is not one of the ICU predefined names. The pointer
|
|
* is only valid for the lifetime of the UNumberingSystem object.
|
|
* @stable ICU 52
|
|
*/
|
|
U_STABLE const char * U_EXPORT2
|
|
unumsys_getName(const UNumberingSystem *unumsys);
|
|
|
|
/**
|
|
* Returns whether the given UNumberingSystem object is for an algorithmic (not purely
|
|
* positional) system.
|
|
* @param unumsys The UNumberingSystem whose algorithmic status is desired.
|
|
* @return TRUE if the specified UNumberingSystem object is for an algorithmic
|
|
* system.
|
|
* @stable ICU 52
|
|
*/
|
|
U_STABLE UBool U_EXPORT2
|
|
unumsys_isAlgorithmic(const UNumberingSystem *unumsys);
|
|
|
|
/**
|
|
* Returns the radix of the specified UNumberingSystem object. Simple positional
|
|
* numbering systems typically have radix 10, but might have a radix of e.g. 16 for
|
|
* hexadecimal. The radix is less well-defined for non-positional algorithmic systems.
|
|
* @param unumsys The UNumberingSystem whose radix is desired.
|
|
* @return The radix of the specified UNumberingSystem object.
|
|
* @stable ICU 52
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
unumsys_getRadix(const UNumberingSystem *unumsys);
|
|
|
|
/**
|
|
* Get the description string of the specified UNumberingSystem object. For simple
|
|
* positional systems this is the ordered string of digits (with length matching
|
|
* the radix), e.g. "\u3007\u4E00\u4E8C\u4E09\u56DB\u4E94\u516D\u4E03\u516B\u4E5D"
|
|
* for "hanidec"; it would be "0123456789ABCDEF" for hexadecimal. For
|
|
* algorithmic systems this is the name of the RBNF ruleset used for formatting,
|
|
* e.g. "zh/SpelloutRules/%spellout-cardinal" for "hans" or "%greek-upper" for
|
|
* "grek".
|
|
* @param unumsys The UNumberingSystem whose description string is desired.
|
|
* @param result A pointer to a buffer to receive the description string.
|
|
* @param resultLength The maximum size of result.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @return The total buffer size needed; if greater than resultLength, the
|
|
* output was truncated.
|
|
* @stable ICU 52
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
unumsys_getDescription(const UNumberingSystem *unumsys, UChar *result,
|
|
int32_t resultLength, UErrorCode *status);
|
|
|
|
#endif /* #if !UCONFIG_NO_FORMATTING */
|
|
|
|
#endif
|
|
|