1// © 2016 and later: Unicode, Inc. and others.
2// License & terms of use: http://www.unicode.org/copyright.html
3/*
4**********************************************************************
5* Copyright (c) 2002-2016, International Business Machines
6* Corporation and others. All Rights Reserved.
7**********************************************************************
8*/
9#ifndef _UCURR_H_
10#define _UCURR_H_
11
12#include "unicode/utypes.h"
13#include "unicode/uenum.h"
14
15/**
16 * \file
17 * \brief C API: Encapsulates information about a currency.
18 *
19 * The ucurr API encapsulates information about a currency, as defined by
20 * ISO 4217. A currency is represented by a 3-character string
21 * containing its ISO 4217 code. This API can return various data
22 * necessary the proper display of a currency:
23 *
24 * <ul><li>A display symbol, for a specific locale
25 * <li>The number of fraction digits to display
26 * <li>A rounding increment
27 * </ul>
28 *
29 * The <tt>DecimalFormat</tt> class uses these data to display
30 * currencies.
31 * @author Alan Liu
32 * @since ICU 2.2
33 */
34
35#if !UCONFIG_NO_FORMATTING
36
37/**
38 * Currency Usage used for Decimal Format
39 * @stable ICU 54
40 */
41enum UCurrencyUsage {
42 /**
43 * a setting to specify currency usage which determines currency digit
44 * and rounding for standard usage, for example: "50.00 NT$"
45 * used as DEFAULT value
46 * @stable ICU 54
47 */
48 UCURR_USAGE_STANDARD=0,
49 /**
50 * a setting to specify currency usage which determines currency digit
51 * and rounding for cash usage, for example: "50 NT$"
52 * @stable ICU 54
53 */
54 UCURR_USAGE_CASH=1,
55#ifndef U_HIDE_DEPRECATED_API
56 /**
57 * One higher than the last enum UCurrencyUsage constant.
58 * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
59 */
60 UCURR_USAGE_COUNT=2
61#endif // U_HIDE_DEPRECATED_API
62};
63/** Currency Usage used for Decimal Format */
64typedef enum UCurrencyUsage UCurrencyUsage;
65
66/**
67 * Finds a currency code for the given locale.
68 * @param locale the locale for which to retrieve a currency code.
69 * Currency can be specified by the "currency" keyword
70 * in which case it overrides the default currency code
71 * @param buff fill in buffer. Can be NULL for preflighting.
72 * @param buffCapacity capacity of the fill in buffer. Can be 0 for
73 * preflighting. If it is non-zero, the buff parameter
74 * must not be NULL.
75 * @param ec error code
76 * @return length of the currency string. It should always be 3. If 0,
77 * currency couldn't be found or the input values are
78 * invalid.
79 * @stable ICU 2.8
80 */
81U_STABLE int32_t U_EXPORT2
82ucurr_forLocale(const char* locale,
83 UChar* buff,
84 int32_t buffCapacity,
85 UErrorCode* ec);
86
87/**
88 * Selector constants for ucurr_getName().
89 *
90 * @see ucurr_getName
91 * @stable ICU 2.6
92 */
93typedef enum UCurrNameStyle {
94 /**
95 * Selector for ucurr_getName indicating a symbolic name for a
96 * currency, such as "$" for USD.
97 * @stable ICU 2.6
98 */
99 UCURR_SYMBOL_NAME,
100
101 /**
102 * Selector for ucurr_getName indicating the long name for a
103 * currency, such as "US Dollar" for USD.
104 * @stable ICU 2.6
105 */
106 UCURR_LONG_NAME,
107
108 /**
109 * Selector for getName() indicating the narrow currency symbol.
110 * The narrow currency symbol is similar to the regular currency
111 * symbol, but it always takes the shortest form: for example,
112 * "$" instead of "US$" for USD in en-CA.
113 *
114 * @stable ICU 61
115 */
116 UCURR_NARROW_SYMBOL_NAME
117} UCurrNameStyle;
118
119#if !UCONFIG_NO_SERVICE
120/**
121 * @stable ICU 2.6
122 */
123typedef const void* UCurrRegistryKey;
124
125/**
126 * Register an (existing) ISO 4217 currency code for the given locale.
127 * Only the country code and the two variants EURO and PRE_EURO are
128 * recognized.
129 * @param isoCode the three-letter ISO 4217 currency code
130 * @param locale the locale for which to register this currency code
131 * @param status the in/out status code
132 * @return a registry key that can be used to unregister this currency code, or NULL
133 * if there was an error.
134 * @stable ICU 2.6
135 */
136U_STABLE UCurrRegistryKey U_EXPORT2
137ucurr_register(const UChar* isoCode,
138 const char* locale,
139 UErrorCode* status);
140/**
141 * Unregister the previously-registered currency definitions using the
142 * URegistryKey returned from ucurr_register. Key becomes invalid after
143 * a successful call and should not be used again. Any currency
144 * that might have been hidden by the original ucurr_register call is
145 * restored.
146 * @param key the registry key returned by a previous call to ucurr_register
147 * @param status the in/out status code, no special meanings are assigned
148 * @return TRUE if the currency for this key was successfully unregistered
149 * @stable ICU 2.6
150 */
151U_STABLE UBool U_EXPORT2
152ucurr_unregister(UCurrRegistryKey key, UErrorCode* status);
153#endif /* UCONFIG_NO_SERVICE */
154
155/**
156 * Returns the display name for the given currency in the
157 * given locale. For example, the display name for the USD
158 * currency object in the en_US locale is "$".
159 * @param currency null-terminated 3-letter ISO 4217 code
160 * @param locale locale in which to display currency
161 * @param nameStyle selector for which kind of name to return
162 * @param isChoiceFormat fill-in set to TRUE if the returned value
163 * is a ChoiceFormat pattern; otherwise it is a static string
164 * @param len fill-in parameter to receive length of result
165 * @param ec error code
166 * @return pointer to display string of 'len' UChars. If the resource
167 * data contains no entry for 'currency', then 'currency' itself is
168 * returned. If *isChoiceFormat is TRUE, then the result is a
169 * ChoiceFormat pattern. Otherwise it is a static string.
170 * @stable ICU 2.6
171 */
172U_STABLE const UChar* U_EXPORT2
173ucurr_getName(const UChar* currency,
174 const char* locale,
175 UCurrNameStyle nameStyle,
176 UBool* isChoiceFormat,
177 int32_t* len,
178 UErrorCode* ec);
179
180/**
181 * Returns the plural name for the given currency in the
182 * given locale. For example, the plural name for the USD
183 * currency object in the en_US locale is "US dollar" or "US dollars".
184 * @param currency null-terminated 3-letter ISO 4217 code
185 * @param locale locale in which to display currency
186 * @param isChoiceFormat fill-in set to TRUE if the returned value
187 * is a ChoiceFormat pattern; otherwise it is a static string
188 * @param pluralCount plural count
189 * @param len fill-in parameter to receive length of result
190 * @param ec error code
191 * @return pointer to display string of 'len' UChars. If the resource
192 * data contains no entry for 'currency', then 'currency' itself is
193 * returned.
194 * @stable ICU 4.2
195 */
196U_STABLE const UChar* U_EXPORT2
197ucurr_getPluralName(const UChar* currency,
198 const char* locale,
199 UBool* isChoiceFormat,
200 const char* pluralCount,
201 int32_t* len,
202 UErrorCode* ec);
203
204/**
205 * Returns the number of the number of fraction digits that should
206 * be displayed for the given currency.
207 * This is equivalent to ucurr_getDefaultFractionDigitsForUsage(currency,UCURR_USAGE_STANDARD,ec);
208 *
209 * Important: The number of fraction digits for a given currency is NOT
210 * guaranteed to be constant across versions of ICU or CLDR. For example,
211 * do NOT use this value as a mechanism for deciding the magnitude used
212 * to store currency values in a database. You should use this value for
213 * display purposes only.
214 *
215 * @param currency null-terminated 3-letter ISO 4217 code
216 * @param ec input-output error code
217 * @return a non-negative number of fraction digits to be
218 * displayed, or 0 if there is an error
219 * @stable ICU 3.0
220 */
221U_STABLE int32_t U_EXPORT2
222ucurr_getDefaultFractionDigits(const UChar* currency,
223 UErrorCode* ec);
224
225/**
226 * Returns the number of the number of fraction digits that should
227 * be displayed for the given currency with usage.
228 *
229 * Important: The number of fraction digits for a given currency is NOT
230 * guaranteed to be constant across versions of ICU or CLDR. For example,
231 * do NOT use this value as a mechanism for deciding the magnitude used
232 * to store currency values in a database. You should use this value for
233 * display purposes only.
234 *
235 * @param currency null-terminated 3-letter ISO 4217 code
236 * @param usage enum usage for the currency
237 * @param ec input-output error code
238 * @return a non-negative number of fraction digits to be
239 * displayed, or 0 if there is an error
240 * @stable ICU 54
241 */
242U_STABLE int32_t U_EXPORT2
243ucurr_getDefaultFractionDigitsForUsage(const UChar* currency,
244 const UCurrencyUsage usage,
245 UErrorCode* ec);
246
247/**
248 * Returns the rounding increment for the given currency, or 0.0 if no
249 * rounding is done by the currency.
250 * This is equivalent to ucurr_getRoundingIncrementForUsage(currency,UCURR_USAGE_STANDARD,ec);
251 * @param currency null-terminated 3-letter ISO 4217 code
252 * @param ec input-output error code
253 * @return the non-negative rounding increment, or 0.0 if none,
254 * or 0.0 if there is an error
255 * @stable ICU 3.0
256 */
257U_STABLE double U_EXPORT2
258ucurr_getRoundingIncrement(const UChar* currency,
259 UErrorCode* ec);
260
261/**
262 * Returns the rounding increment for the given currency, or 0.0 if no
263 * rounding is done by the currency given usage.
264 * @param currency null-terminated 3-letter ISO 4217 code
265 * @param usage enum usage for the currency
266 * @param ec input-output error code
267 * @return the non-negative rounding increment, or 0.0 if none,
268 * or 0.0 if there is an error
269 * @stable ICU 54
270 */
271U_STABLE double U_EXPORT2
272ucurr_getRoundingIncrementForUsage(const UChar* currency,
273 const UCurrencyUsage usage,
274 UErrorCode* ec);
275
276/**
277 * Selector constants for ucurr_openCurrencies().
278 *
279 * @see ucurr_openCurrencies
280 * @stable ICU 3.2
281 */
282typedef enum UCurrCurrencyType {
283 /**
284 * Select all ISO-4217 currency codes.
285 * @stable ICU 3.2
286 */
287 UCURR_ALL = INT32_MAX,
288 /**
289 * Select only ISO-4217 commonly used currency codes.
290 * These currencies can be found in common use, and they usually have
291 * bank notes or coins associated with the currency code.
292 * This does not include fund codes, precious metals and other
293 * various ISO-4217 codes limited to special financial products.
294 * @stable ICU 3.2
295 */
296 UCURR_COMMON = 1,
297 /**
298 * Select ISO-4217 uncommon currency codes.
299 * These codes respresent fund codes, precious metals and other
300 * various ISO-4217 codes limited to special financial products.
301 * A fund code is a monetary resource associated with a currency.
302 * @stable ICU 3.2
303 */
304 UCURR_UNCOMMON = 2,
305 /**
306 * Select only deprecated ISO-4217 codes.
307 * These codes are no longer in general public use.
308 * @stable ICU 3.2
309 */
310 UCURR_DEPRECATED = 4,
311 /**
312 * Select only non-deprecated ISO-4217 codes.
313 * These codes are in general public use.
314 * @stable ICU 3.2
315 */
316 UCURR_NON_DEPRECATED = 8
317} UCurrCurrencyType;
318
319/**
320 * Provides a UEnumeration object for listing ISO-4217 codes.
321 * @param currType You can use one of several UCurrCurrencyType values for this
322 * variable. You can also | (or) them together to get a specific list of
323 * currencies. Most people will want to use the (UCURR_CURRENCY|UCURR_NON_DEPRECATED) value to
324 * get a list of current currencies.
325 * @param pErrorCode Error code
326 * @stable ICU 3.2
327 */
328U_STABLE UEnumeration * U_EXPORT2
329ucurr_openISOCurrencies(uint32_t currType, UErrorCode *pErrorCode);
330
331/**
332 * Queries if the given ISO 4217 3-letter code is available on the specified date range.
333 *
334 * Note: For checking availability of a currency on a specific date, specify the date on both 'from' and 'to'
335 *
336 * When 'from' is U_DATE_MIN and 'to' is U_DATE_MAX, this method checks if the specified currency is available any time.
337 * If 'from' and 'to' are same UDate value, this method checks if the specified currency is available on that date.
338 *
339 * @param isoCode
340 * The ISO 4217 3-letter code.
341 *
342 * @param from
343 * The lower bound of the date range, inclusive. When 'from' is U_DATE_MIN, check the availability
344 * of the currency any date before 'to'
345 *
346 * @param to
347 * The upper bound of the date range, inclusive. When 'to' is U_DATE_MAX, check the availability of
348 * the currency any date after 'from'
349 *
350 * @param errorCode
351 * ICU error code
352 *
353 * @return TRUE if the given ISO 4217 3-letter code is supported on the specified date range.
354 *
355 * @stable ICU 4.8
356 */
357U_STABLE UBool U_EXPORT2
358ucurr_isAvailable(const UChar* isoCode,
359 UDate from,
360 UDate to,
361 UErrorCode* errorCode);
362
363/**
364 * Finds the number of valid currency codes for the
365 * given locale and date.
366 * @param locale the locale for which to retrieve the
367 * currency count.
368 * @param date the date for which to retrieve the
369 * currency count for the given locale.
370 * @param ec error code
371 * @return the number of currency codes for the
372 * given locale and date. If 0, currency
373 * codes couldn't be found for the input
374 * values are invalid.
375 * @stable ICU 4.0
376 */
377U_STABLE int32_t U_EXPORT2
378ucurr_countCurrencies(const char* locale,
379 UDate date,
380 UErrorCode* ec);
381
382/**
383 * Finds a currency code for the given locale and date
384 * @param locale the locale for which to retrieve a currency code.
385 * Currency can be specified by the "currency" keyword
386 * in which case it overrides the default currency code
387 * @param date the date for which to retrieve a currency code for
388 * the given locale.
389 * @param index the index within the available list of currency codes
390 * for the given locale on the given date.
391 * @param buff fill in buffer. Can be NULL for preflighting.
392 * @param buffCapacity capacity of the fill in buffer. Can be 0 for
393 * preflighting. If it is non-zero, the buff parameter
394 * must not be NULL.
395 * @param ec error code
396 * @return length of the currency string. It should always be 3.
397 * If 0, currency couldn't be found or the input values are
398 * invalid.
399 * @stable ICU 4.0
400 */
401U_STABLE int32_t U_EXPORT2
402ucurr_forLocaleAndDate(const char* locale,
403 UDate date,
404 int32_t index,
405 UChar* buff,
406 int32_t buffCapacity,
407 UErrorCode* ec);
408
409/**
410 * Given a key and a locale, returns an array of string values in a preferred
411 * order that would make a difference. These are all and only those values where
412 * the open (creation) of the service with the locale formed from the input locale
413 * plus input keyword and that value has different behavior than creation with the
414 * input locale alone.
415 * @param key one of the keys supported by this service. For now, only
416 * "currency" is supported.
417 * @param locale the locale
418 * @param commonlyUsed if set to true it will return only commonly used values
419 * with the given locale in preferred order. Otherwise,
420 * it will return all the available values for the locale.
421 * @param status error status
422 * @return a string enumeration over keyword values for the given key and the locale.
423 * @stable ICU 4.2
424 */
425U_STABLE UEnumeration* U_EXPORT2
426ucurr_getKeywordValuesForLocale(const char* key,
427 const char* locale,
428 UBool commonlyUsed,
429 UErrorCode* status);
430
431/**
432 * Returns the ISO 4217 numeric code for the currency.
433 * <p>Note: If the ISO 4217 numeric code is not assigned for the currency or
434 * the currency is unknown, this function returns 0.
435 *
436 * @param currency null-terminated 3-letter ISO 4217 code
437 * @return The ISO 4217 numeric code of the currency
438 * @stable ICU 49
439 */
440U_STABLE int32_t U_EXPORT2
441ucurr_getNumericCode(const UChar* currency);
442
443#endif /* #if !UCONFIG_NO_FORMATTING */
444
445#endif
446