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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
* Copyright (c) 2002-2016, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
*/
#ifndef _UCURR_H_
#define _UCURR_H_
#include "unicode/utypes.h"
#include "unicode/uenum.h"
/**
* \file
* \brief C API: Encapsulates information about a currency.
*
* The ucurr API encapsulates information about a currency, as defined by
* ISO 4217. A currency is represented by a 3-character string
* containing its ISO 4217 code. This API can return various data
* necessary the proper display of a currency:
*
* <ul><li>A display symbol, for a specific locale
* <li>The number of fraction digits to display
* <li>A rounding increment
* </ul>
*
* The <tt>DecimalFormat</tt> class uses these data to display
* currencies.
* @author Alan Liu
* @since ICU 2.2
*/
#if !UCONFIG_NO_FORMATTING
/**
* Currency Usage used for Decimal Format
* @stable ICU 54
*/
enum UCurrencyUsage {
/**
* a setting to specify currency usage which determines currency digit
* and rounding for standard usage, for example: "50.00 NT$"
* used as DEFAULT value
* @stable ICU 54
*/
UCURR_USAGE_STANDARD=0,
/**
* a setting to specify currency usage which determines currency digit
* and rounding for cash usage, for example: "50 NT$"
* @stable ICU 54
*/
UCURR_USAGE_CASH=1,
#ifndef U_HIDE_DEPRECATED_API
/**
* One higher than the last enum UCurrencyUsage constant.
* @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
*/
UCURR_USAGE_COUNT=2
#endif // U_HIDE_DEPRECATED_API
};
/** Currency Usage used for Decimal Format */
typedef enum UCurrencyUsage UCurrencyUsage;
/**
* Finds a currency code for the given locale.
* @param locale the locale for which to retrieve a currency code.
* Currency can be specified by the "currency" keyword
* in which case it overrides the default currency code
* @param buff fill in buffer. Can be NULL for preflighting.
* @param buffCapacity capacity of the fill in buffer. Can be 0 for
* preflighting. If it is non-zero, the buff parameter
* must not be NULL.
* @param ec error code
* @return length of the currency string. It should always be 3. If 0,
* currency couldn't be found or the input values are
* invalid.
* @stable ICU 2.8
*/
U_CAPI int32_t U_EXPORT2
ucurr_forLocale(const char* locale,
UChar* buff,
int32_t buffCapacity,
UErrorCode* ec);
/**
* Selector constants for ucurr_getName().
*
* @see ucurr_getName
* @stable ICU 2.6
*/
typedef enum UCurrNameStyle {
/**
* Selector for ucurr_getName indicating a symbolic name for a
* currency, such as "$" for USD.
* @stable ICU 2.6
*/
UCURR_SYMBOL_NAME,
/**
* Selector for ucurr_getName indicating the long name for a
* currency, such as "US Dollar" for USD.
* @stable ICU 2.6
*/
UCURR_LONG_NAME,
/**
* Selector for getName() indicating the narrow currency symbol.
* The narrow currency symbol is similar to the regular currency
* symbol, but it always takes the shortest form: for example,
* "$" instead of "US$" for USD in en-CA.
*
* @stable ICU 61
*/
UCURR_NARROW_SYMBOL_NAME,
/**
* Selector for getName() indicating the formal currency symbol.
* The formal currency symbol is similar to the regular currency
* symbol, but it always takes the form used in formal settings
* such as banking; for example, "NT$" instead of "$" for TWD in zh-TW.
*
* @stable ICU 68
*/
UCURR_FORMAL_SYMBOL_NAME,
/**
* Selector for getName() indicating the variant currency symbol.
* The variant symbol for a currency is an alternative symbol
* that is not necessarily as widely used as the regular symbol.
*
* @stable ICU 68
*/
UCURR_VARIANT_SYMBOL_NAME
} UCurrNameStyle;
#if !UCONFIG_NO_SERVICE
/**
* @stable ICU 2.6
*/
typedef const void* UCurrRegistryKey;
/**
* Register an (existing) ISO 4217 currency code for the given locale.
* Only the country code and the two variants EURO and PRE_EURO are
* recognized.
* @param isoCode the three-letter ISO 4217 currency code
* @param locale the locale for which to register this currency code
* @param status the in/out status code
* @return a registry key that can be used to unregister this currency code, or NULL
* if there was an error.
* @stable ICU 2.6
*/
U_CAPI UCurrRegistryKey U_EXPORT2
ucurr_register(const UChar* isoCode,
const char* locale,
UErrorCode* status);
/**
* Unregister the previously-registered currency definitions using the
* URegistryKey returned from ucurr_register. Key becomes invalid after
* a successful call and should not be used again. Any currency
* that might have been hidden by the original ucurr_register call is
* restored.
* @param key the registry key returned by a previous call to ucurr_register
* @param status the in/out status code, no special meanings are assigned
* @return true if the currency for this key was successfully unregistered
* @stable ICU 2.6
*/
U_CAPI UBool U_EXPORT2
ucurr_unregister(UCurrRegistryKey key, UErrorCode* status);
#endif /* UCONFIG_NO_SERVICE */
/**
* Returns the display name for the given currency in the
* given locale. For example, the display name for the USD
* currency object in the en_US locale is "$".
* @param currency null-terminated 3-letter ISO 4217 code
* @param locale locale in which to display currency
* @param nameStyle selector for which kind of name to return
* @param isChoiceFormat always set to false, or can be NULL;
* display names are static strings;
* since ICU 4.4, ChoiceFormat patterns are no longer supported
* @param len fill-in parameter to receive length of result
* @param ec error code
* @return pointer to display string of 'len' UChars. If the resource
* data contains no entry for 'currency', then 'currency' itself is
* returned.
* @stable ICU 2.6
*/
U_CAPI const UChar* U_EXPORT2
ucurr_getName(const UChar* currency,
const char* locale,
UCurrNameStyle nameStyle,
UBool* isChoiceFormat,
int32_t* len,
UErrorCode* ec);
/**
* Returns the plural name for the given currency in the
* given locale. For example, the plural name for the USD
* currency object in the en_US locale is "US dollar" or "US dollars".
* @param currency null-terminated 3-letter ISO 4217 code
* @param locale locale in which to display currency
* @param isChoiceFormat always set to false, or can be NULL;
* display names are static strings;
* since ICU 4.4, ChoiceFormat patterns are no longer supported
* @param pluralCount plural count
* @param len fill-in parameter to receive length of result
* @param ec error code
* @return pointer to display string of 'len' UChars. If the resource
* data contains no entry for 'currency', then 'currency' itself is
* returned.
* @stable ICU 4.2
*/
U_CAPI const UChar* U_EXPORT2
ucurr_getPluralName(const UChar* currency,
const char* locale,
UBool* isChoiceFormat,
const char* pluralCount,
int32_t* len,
UErrorCode* ec);
/**
* Returns the number of the number of fraction digits that should
* be displayed for the given currency.
* This is equivalent to ucurr_getDefaultFractionDigitsForUsage(currency,UCURR_USAGE_STANDARD,ec);
*
* Important: The number of fraction digits for a given currency is NOT
* guaranteed to be constant across versions of ICU or CLDR. For example,
* do NOT use this value as a mechanism for deciding the magnitude used
* to store currency values in a database. You should use this value for
* display purposes only.
*
* @param currency null-terminated 3-letter ISO 4217 code
* @param ec input-output error code
* @return a non-negative number of fraction digits to be
* displayed, or 0 if there is an error
* @stable ICU 3.0
*/
U_CAPI int32_t U_EXPORT2
ucurr_getDefaultFractionDigits(const UChar* currency,
UErrorCode* ec);
/**
* Returns the number of the number of fraction digits that should
* be displayed for the given currency with usage.
*
* Important: The number of fraction digits for a given currency is NOT
* guaranteed to be constant across versions of ICU or CLDR. For example,
* do NOT use this value as a mechanism for deciding the magnitude used
* to store currency values in a database. You should use this value for
* display purposes only.
*
* @param currency null-terminated 3-letter ISO 4217 code
* @param usage enum usage for the currency
* @param ec input-output error code
* @return a non-negative number of fraction digits to be
* displayed, or 0 if there is an error
* @stable ICU 54
*/
U_CAPI int32_t U_EXPORT2
ucurr_getDefaultFractionDigitsForUsage(const UChar* currency,
const UCurrencyUsage usage,
UErrorCode* ec);
/**
* Returns the rounding increment for the given currency, or 0.0 if no
* rounding is done by the currency.
* This is equivalent to ucurr_getRoundingIncrementForUsage(currency,UCURR_USAGE_STANDARD,ec);
* @param currency null-terminated 3-letter ISO 4217 code
* @param ec input-output error code
* @return the non-negative rounding increment, or 0.0 if none,
* or 0.0 if there is an error
* @stable ICU 3.0
*/
U_CAPI double U_EXPORT2
ucurr_getRoundingIncrement(const UChar* currency,
UErrorCode* ec);
/**
* Returns the rounding increment for the given currency, or 0.0 if no
* rounding is done by the currency given usage.
* @param currency null-terminated 3-letter ISO 4217 code
* @param usage enum usage for the currency
* @param ec input-output error code
* @return the non-negative rounding increment, or 0.0 if none,
* or 0.0 if there is an error
* @stable ICU 54
*/
U_CAPI double U_EXPORT2
ucurr_getRoundingIncrementForUsage(const UChar* currency,
const UCurrencyUsage usage,
UErrorCode* ec);
/**
* Selector constants for ucurr_openCurrencies().
*
* @see ucurr_openCurrencies
* @stable ICU 3.2
*/
typedef enum UCurrCurrencyType {
/**
* Select all ISO-4217 currency codes.
* @stable ICU 3.2
*/
UCURR_ALL = INT32_MAX,
/**
* Select only ISO-4217 commonly used currency codes.
* These currencies can be found in common use, and they usually have
* bank notes or coins associated with the currency code.
* This does not include fund codes, precious metals and other
* various ISO-4217 codes limited to special financial products.
* @stable ICU 3.2
*/
UCURR_COMMON = 1,
/**
* Select ISO-4217 uncommon currency codes.
* These codes respresent fund codes, precious metals and other
* various ISO-4217 codes limited to special financial products.
* A fund code is a monetary resource associated with a currency.
* @stable ICU 3.2
*/
UCURR_UNCOMMON = 2,
/**
* Select only deprecated ISO-4217 codes.
* These codes are no longer in general public use.
* @stable ICU 3.2
*/
UCURR_DEPRECATED = 4,
/**
* Select only non-deprecated ISO-4217 codes.
* These codes are in general public use.
* @stable ICU 3.2
*/
UCURR_NON_DEPRECATED = 8
} UCurrCurrencyType;
/**
* Provides a UEnumeration object for listing ISO-4217 codes.
* @param currType You can use one of several UCurrCurrencyType values for this
* variable. You can also | (or) them together to get a specific list of
* currencies. Most people will want to use the (UCURR_COMMON|UCURR_NON_DEPRECATED) value to
* get a list of current currencies.
* @param pErrorCode Error code
* @stable ICU 3.2
*/
U_CAPI UEnumeration * U_EXPORT2
ucurr_openISOCurrencies(uint32_t currType, UErrorCode *pErrorCode);
/**
* Queries if the given ISO 4217 3-letter code is available on the specified date range.
*
* Note: For checking availability of a currency on a specific date, specify the date on both 'from' and 'to'
*
* When 'from' is U_DATE_MIN and 'to' is U_DATE_MAX, this method checks if the specified currency is available any time.
* If 'from' and 'to' are same UDate value, this method checks if the specified currency is available on that date.
*
* @param isoCode
* The ISO 4217 3-letter code.
*
* @param from
* The lower bound of the date range, inclusive. When 'from' is U_DATE_MIN, check the availability
* of the currency any date before 'to'
*
* @param to
* The upper bound of the date range, inclusive. When 'to' is U_DATE_MAX, check the availability of
* the currency any date after 'from'
*
* @param errorCode
* ICU error code
*
* @return true if the given ISO 4217 3-letter code is supported on the specified date range.
*
* @stable ICU 4.8
*/
U_CAPI UBool U_EXPORT2
ucurr_isAvailable(const UChar* isoCode,
UDate from,
UDate to,
UErrorCode* errorCode);
/**
* Finds the number of valid currency codes for the
* given locale and date.
* @param locale the locale for which to retrieve the
* currency count.
* @param date the date for which to retrieve the
* currency count for the given locale.
* @param ec error code
* @return the number of currency codes for the
* given locale and date. If 0, currency
* codes couldn't be found for the input
* values are invalid.
* @stable ICU 4.0
*/
U_CAPI int32_t U_EXPORT2
ucurr_countCurrencies(const char* locale,
UDate date,
UErrorCode* ec);
/**
* Finds a currency code for the given locale and date
* @param locale the locale for which to retrieve a currency code.
* Currency can be specified by the "currency" keyword
* in which case it overrides the default currency code
* @param date the date for which to retrieve a currency code for
* the given locale.
* @param index the index within the available list of currency codes
* for the given locale on the given date.
* @param buff fill in buffer. Can be NULL for preflighting.
* @param buffCapacity capacity of the fill in buffer. Can be 0 for
* preflighting. If it is non-zero, the buff parameter
* must not be NULL.
* @param ec error code
* @return length of the currency string. It should always be 3.
* If 0, currency couldn't be found or the input values are
* invalid.
* @stable ICU 4.0
*/
U_CAPI int32_t U_EXPORT2
ucurr_forLocaleAndDate(const char* locale,
UDate date,
int32_t index,
UChar* buff,
int32_t buffCapacity,
UErrorCode* ec);
/**
* Given a key and a locale, returns an array of string values in a preferred
* order that would make a difference. These are all and only those values where
* the open (creation) of the service with the locale formed from the input locale
* plus input keyword and that value has different behavior than creation with the
* input locale alone.
* @param key one of the keys supported by this service. For now, only
* "currency" is supported.
* @param locale the locale
* @param commonlyUsed if set to true it will return only commonly used values
* with the given locale in preferred order. Otherwise,
* it will return all the available values for the locale.
* @param status error status
* @return a string enumeration over keyword values for the given key and the locale.
* @stable ICU 4.2
*/
U_CAPI UEnumeration* U_EXPORT2
ucurr_getKeywordValuesForLocale(const char* key,
const char* locale,
UBool commonlyUsed,
UErrorCode* status);
/**
* Returns the ISO 4217 numeric code for the currency.
* <p>Note: If the ISO 4217 numeric code is not assigned for the currency or
* the currency is unknown, this function returns 0.
*
* @param currency null-terminated 3-letter ISO 4217 code
* @return The ISO 4217 numeric code of the currency
* @stable ICU 49
*/
U_CAPI int32_t U_EXPORT2
ucurr_getNumericCode(const UChar* currency);
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif