198 lines
6.6 KiB
C
198 lines
6.6 KiB
C
/*
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**********************************************************************
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* Copyright (c) 2002-2004, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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*/
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#ifndef _UCURR_H_
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#define _UCURR_H_
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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/**
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* The ucurr API encapsulates information about a currency, as defined by
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* ISO 4217. A currency is represented by a 3-character string
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* containing its ISO 4217 code. This API can return various data
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* necessary the proper display of a currency:
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*
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* <ul><li>A display symbol, for a specific locale
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* <li>The number of fraction digits to display
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* <li>A rounding increment
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* </ul>
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*
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* The <tt>DecimalFormat</tt> class uses these data to display
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* currencies.
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* @author Alan Liu
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* @since ICU 2.2
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*/
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/**
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* Finds a currency code for the given locale.
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* @param locale the locale for which to retrieve a currency code.
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* Currency can be specified by the "currency" keyword
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* in which case it overrides the default currency code
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* @param buff fill in buffer. Can be NULL for preflighting.
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* @param buffCapacity capacity of the fill in buffer. Can be 0 for
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* preflighting. If it is non-zero, the buff parameter
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* must not be NULL.
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* @param ec error code
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* @return length of the currency string. It should always be 3. If 0,
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* currency couldn't be found or the input values are
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* invalid.
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* @draft ICU 2.8
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*/
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U_DRAFT int32_t U_EXPORT2
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ucurr_forLocale(const char* locale,
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UChar* buff,
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int32_t buffCapacity,
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UErrorCode* ec);
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/**
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* Selector constants for ucurr_getName().
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*
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* @see ucurr_getName
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* @stable ICU 2.6
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*/
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typedef enum UCurrNameStyle {
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/**
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* Selector for ucurr_getName indicating a symbolic name for a
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* currency, such as "$" for USD.
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* @stable ICU 2.6
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*/
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UCURR_SYMBOL_NAME,
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/**
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* Selector for ucurr_getName indicating the long name for a
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* currency, such as "US Dollar" for USD.
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* @stable ICU 2.6
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*/
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UCURR_LONG_NAME
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} UCurrNameStyle;
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#if !UCONFIG_NO_SERVICE
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/**
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* @internal
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*/
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typedef const void* UCurrRegistryKey;
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/**
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* Register an (existing) ISO 4217 currency code for the given locale.
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* Only the country code and the two variants EURO and PRE_EURO are
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* recognized.
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* @param isoCode the three-letter ISO 4217 currency code
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* @param locale the locale for which to register this currency code
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* @param status the in/out status code
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* @return a registry key that can be used to unregister this currency code, or NULL
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* if there was an error.
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* @stable ICU 2.6
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*/
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U_STABLE UCurrRegistryKey U_EXPORT2
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ucurr_register(const UChar* isoCode,
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const char* locale,
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UErrorCode* status);
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/**
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* Unregister the previously-registered currency definitions using the
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* URegistryKey returned from ucurr_register. Key becomes invalid after
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* a successful call and should not be used again. Any currency
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* that might have been hidden by the original ucurr_register call is
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* restored.
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* @param key the registry key returned by a previous call to ucurr_register
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* @param status the in/out status code, no special meanings are assigned
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* @return TRUE if the currency for this key was successfully unregistered
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* @stable ICU 2.6
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*/
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U_STABLE UBool U_EXPORT2
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ucurr_unregister(UCurrRegistryKey key, UErrorCode* status);
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#endif /* UCONFIG_NO_SERVICE */
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/**
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* Returns the display name for the given currency in the
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* given locale. For example, the display name for the USD
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* currency object in the en_US locale is "$".
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* @param currency null-terminated 3-letter ISO 4217 code
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* @param locale locale in which to display currency
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* @param nameStyle selector for which kind of name to return
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* @param isChoiceFormat fill-in set to TRUE if the returned value
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* is a ChoiceFormat pattern; otherwise it is a static string
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* @param len fill-in parameter to receive length of result
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* @param ec error code
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* @return pointer to display string of 'len' UChars. If the resource
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* data contains no entry for 'currency', then 'currency' itself is
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* returned. If *isChoiceFormat is TRUE, then the result is a
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* ChoiceFormat pattern. Otherwise it is a static string.
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* @stable ICU 2.6
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*/
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U_STABLE const UChar* U_EXPORT2
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ucurr_getName(const UChar* currency,
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const char* locale,
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UCurrNameStyle nameStyle,
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UBool* isChoiceFormat,
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int32_t* len,
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UErrorCode* ec);
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/**
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* Returns the number of the number of fraction digits that should
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* be displayed for the given currency.
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* @param currency null-terminated 3-letter ISO 4217 code
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* @param ec input-output error code
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* @return a non-negative number of fraction digits to be
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* displayed, or 0 if there is an error
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* @draft ICU 3.0
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*/
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U_DRAFT int32_t U_EXPORT2
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ucurr_getDefaultFractionDigits(const UChar* currency,
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UErrorCode* ec);
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/**
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* Returns the rounding increment for the given currency, or 0.0 if no
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* rounding is done by the currency.
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* @param currency null-terminated 3-letter ISO 4217 code
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* @param ec input-output error code
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* @return the non-negative rounding increment, or 0.0 if none,
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* or 0.0 if there is an error
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* @draft ICU 3.0
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*/
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U_DRAFT double U_EXPORT2
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ucurr_getRoundingIncrement(const UChar* currency,
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UErrorCode* ec);
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#ifdef XP_CPLUSPLUS
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#include "unicode/unistr.h"
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#include "unicode/parsepos.h"
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U_NAMESPACE_BEGIN
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/**
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* Attempt to parse the given string as a currency, either as a
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* display name in the given locale, or as a 3-letter ISO 4217
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* code. If multiple display names match, then the longest one is
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* selected. If both a display name and a 3-letter ISO code
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* match, then the display name is preferred, unless it's length
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* is less than 3.
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*
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* @param locale the locale of the display names to match
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* @param text the text to parse
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* @param pos input-output position; on input, the position within
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* text to match; must have 0 <= pos.getIndex() < text.length();
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* on output, the position after the last matched character. If
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* the parse fails, the position in unchanged upon output.
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* @return the ISO 4217 code, as a string, of the best match, or
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* null if there is no match
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*
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* @internal
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*/
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void
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uprv_parseCurrency(const char* locale,
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const UnicodeString& text,
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ParsePosition& pos,
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UChar* result,
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UErrorCode& ec);
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U_NAMESPACE_END
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#endif
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#endif /* #if !UCONFIG_NO_FORMATTING */
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#endif
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