Tizen Native API  7.0

C API: UNumberingSystem, information about numbering systems.

Required Header

#include <utils_i18n.h>

Overview

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. Formatting numbers is done using the Unumber API.

Functions

int i18n_unumsys_create (const char *locale, i18n_unumsys_h *unumsys)
 Creates an i18n_unumsys_h using the numbering system for the specified locale.
int i18n_unumsys_create_by_name (const char *name, i18n_unumsys_h *unumsys)
 Creates an i18n_unumsys_h 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 i18n_unumsys_get_available_names.
void i18n_unumsys_destroy (i18n_unumsys_h unumsys)
 Destroys an i18n_unumsys_h.
int i18n_unumsys_get_available_names (i18n_uenumeration_h *uenum)
 Returns an enumeration over the names of all of the predefined numbering systems known to ICU.
int i18n_unumsys_get_name (i18n_unumsys_h unumsys, const char **name)
 Returns the name of the specified i18n_unumsys_h.
int i18n_unumsys_is_algorithmic (i18n_unumsys_h unumsys, i18n_ubool *is_algorithmic)
 Returns whether the given i18n_unumsys_h is for an algorithmic (not purely positional) system.
int i18n_unumsys_get_radix (i18n_unumsys_h unumsys, int32_t *radix)
 Returns the radix of the specified i18n_unumsys_h.
int i18n_unumsys_get_description (i18n_unumsys_h unumsys, i18n_uchar *result, int32_t result_max_len, int32_t *ulen)
 Gets the description string of the specified i18n_unumsys_h.

Typedefs

typedef void * i18n_unumsys_h
 An i18n_unumsys_h handle.

Typedef Documentation

typedef void* i18n_unumsys_h

An i18n_unumsys_h handle.

Since :
6.0

Function Documentation

int i18n_unumsys_create ( const char *  locale,
i18n_unumsys_h unumsys 
)

Creates an i18n_unumsys_h using the numbering system for the specified locale.

Since :
6.0
Parameters:
[in]localeThe locale for which the default numbering system should be created.
[out]unumsysAn i18n_unumsys_h handle for the specified locale, or NULL if an error occurred.
Remarks:
The unumsys should be released using i18n_unumsys_destroy().
Returns:
0 on success, otherwise a negative error value
Return values:
I18N_ERROR_NONESuccessful
I18N_ERROR_NOT_SUPPORTEDA locale such as "en@numbers=xyz" that specifies a numbering system unknown to ICU.
I18N_ERROR_INVALID_PARAMETERInvalid function parameter
int i18n_unumsys_create_by_name ( const char *  name,
i18n_unumsys_h unumsys 
)

Creates an i18n_unumsys_h 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 i18n_unumsys_get_available_names.

Since :
6.0
Parameters:
[in]nameThe name of the numbering system for which an i18n_unumsys_h should be created.
[out]unumsysAn i18n_unumsys_h handle for the specified name, or NULL if an error occurred.
Returns:
0 on success, otherwise a negative error value
Return values:
I18N_ERROR_NONESuccessful
I18N_ERROR_NOT_SUPPORTEDA numbering system unknown to ICU.
I18N_ERROR_INVALID_PARAMETERInvalid function parameter

Destroys an i18n_unumsys_h.

Once closed it may no longer be used.

Since :
6.0
Parameters:
[in]unumsysThe i18n_unumsys_h to destroy.

Returns an enumeration over the names of all of the predefined numbering systems known to ICU.

The numbering system names will be in alphabetical (invariant) order.

Since :
6.0
Parameters:
[out]uenumA pointer to a i18n_uenumeration_h that must be closed with i18n_uenumeration_destroy(), or NULL if an error occurred.
Returns:
0 on success, otherwise a negative error value
Return values:
I18N_ERROR_NONESuccessful
I18N_ERROR_INVALID_PARAMETERInvalid function parameter
I18N_ERROR_OUT_OF_MEMORYOut of memory
int i18n_unumsys_get_description ( i18n_unumsys_h  unumsys,
i18n_uchar result,
int32_t  result_max_len,
int32_t *  ulen 
)

Gets the description string of the specified i18n_unumsys_h.

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".

Since :
6.0
Parameters:
[in]unumsysThe i18n_unumsys_h whose description string is desired.
[in]resultA pointer to a buffer to receive the description string.
[in]result_max_lenThe maximum size of result.
[out]ulenThe total buffer size needed; if greater than result_length, the output was truncated.
Returns:
0 on success, otherwise a negative error value
Return values:
I18N_ERROR_NONESuccessful
I18N_ERROR_INVALID_PARAMETERInvalid function parameter
I18N_ERROR_OUT_OF_MEMORYOut of memory
int i18n_unumsys_get_name ( i18n_unumsys_h  unumsys,
const char **  name 
)

Returns the name of the specified i18n_unumsys_h.

Since :
6.0
Parameters:
[in]unumsysThe i18n_unumsys_h whose name is desired.
[out]nameA pointer to the name of the specified i18n_unumsys_h, or NULL if the name is not one of the ICU predefined names. The pointer is only valid for the lifetime of the i18n_unumsys_h.
Returns:
0 on success, otherwise a negative error value
Return values:
I18N_ERROR_NONESuccessful
I18N_ERROR_INVALID_PARAMETERInvalid function parameter
I18N_ERROR_OUT_OF_MEMORYOut of memory
int i18n_unumsys_get_radix ( i18n_unumsys_h  unumsys,
int32_t *  radix 
)

Returns the radix of the specified i18n_unumsys_h.

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.

Since :
6.0
Parameters:
[in]unumsysThe i18n_unumsys_h whose radix is desired.
[out]radixThe radix of the specified i18n_unumsys_h.
Returns:
0 on success, otherwise a negative error value
Return values:
I18N_ERROR_NONESuccessful
I18N_ERROR_INVALID_PARAMETERInvalid function parameter
I18N_ERROR_OUT_OF_MEMORYOut of memory
int i18n_unumsys_is_algorithmic ( i18n_unumsys_h  unumsys,
i18n_ubool is_algorithmic 
)

Returns whether the given i18n_unumsys_h is for an algorithmic (not purely positional) system.

Since :
6.0
Parameters:
[in]unumsysThe i18n_unumsys_h whose algorithmic status is desired.
[out]is_algorithmicTRUE if the specified i18n_unumsys_h is for an algorithmic system.
Returns:
0 on success, otherwise a negative error value
Return values:
I18N_ERROR_NONESuccessful
I18N_ERROR_INVALID_PARAMETERInvalid function parameter
I18N_ERROR_OUT_OF_MEMORYOut of memory