5005d6e0ec
X-SVN-Rev: 13569
538 lines
16 KiB
C++
538 lines
16 KiB
C++
/*
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**********************************************************************
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* Copyright (c) 2002-2003, 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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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/ucurr.h"
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#include "unicode/locid.h"
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#include "unicode/resbund.h"
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#include "unicode/ustring.h"
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#include "unicode/choicfmt.h"
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#include "cmemory.h"
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#include "cstring.h"
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#include "uassert.h"
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#include "iculserv.h"
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#include "ucln_in.h"
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//------------------------------------------------------------
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// Constants
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// Default currency meta data of last resort. We try to use the
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// defaults encoded in the meta data resource bundle. If there is a
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// configuration/build error and these are not available, we use these
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// hard-coded defaults (which should be identical).
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static const int32_t LAST_RESORT_DATA[] = { 2, 0 };
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// POW10[i] = 10^i, i=0..MAX_POW10
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static const int32_t POW10[] = { 1, 10, 100, 1000, 10000, 100000,
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1000000, 10000000, 100000000, 1000000000 };
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static const int32_t MAX_POW10 = (sizeof(POW10)/sizeof(POW10[0])) - 1;
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#define ISO_COUNTRY_CODE_LENGTH 3
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//------------------------------------------------------------
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// Resource tags
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// Tag for meta-data, in root.
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static const char CURRENCY_META[] = "CurrencyMeta";
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// Tag for map from countries to currencies, in root.
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static const char CURRENCY_MAP[] = "CurrencyMap";
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// Tag for default meta-data, in CURRENCY_META
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static const char DEFAULT_META[] = "DEFAULT";
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// Variant for legacy pre-euro mapping in CurrencyMap
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static const char VAR_PRE_EURO[] = "PREEURO";
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// Variant for legacy euro mapping in CurrencyMap
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static const char VAR_EURO[] = "EURO";
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// Variant delimiter
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static const char VAR_DELIM[] = "_";
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// Variant for legacy euro mapping in CurrencyMap
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static const char VAR_DELIM_EURO[] = "_EURO";
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#define VARIANT_IS_EMPTY 0
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#define VARIANT_IS_EURO 0x1
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#define VARIANT_IS_PREEURO 0x2
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// Tag for localized display names (symbols) of currencies
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static const char CURRENCIES[] = "Currencies";
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// Marker character indicating that a display name is a ChoiceFormat
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// pattern. Strings that start with one mark are ChoiceFormat
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// patterns. Strings that start with 2 marks are static strings, and
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// the first mark is deleted.
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static const UChar CHOICE_FORMAT_MARK = 0x003D; // Equals sign
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//------------------------------------------------------------
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// Code
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/**
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* Unfortunately, we have to convert the UChar* currency code to char*
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* to use it as a resource key.
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*/
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static inline char*
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myUCharsToChars(char* resultOfLen4, const UChar* currency) {
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u_UCharsToChars(currency, resultOfLen4, ISO_COUNTRY_CODE_LENGTH);
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resultOfLen4[ISO_COUNTRY_CODE_LENGTH] = 0;
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return resultOfLen4;
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}
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/**
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* Internal function to look up currency data. Result is an array of
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* two integers. The first is the fraction digits. The second is the
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* rounding increment, or 0 if none. The rounding increment is in
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* units of 10^(-fraction_digits).
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*/
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static const int32_t*
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_findMetaData(const UChar* currency) {
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// Get CurrencyMeta resource out of root locale file. [This may
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// move out of the root locale file later; if it does, update this
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// code.]
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UErrorCode ec = U_ZERO_ERROR;
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ResourceBundle currencyMeta =
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ResourceBundle((char*)0, Locale(""), ec).get(CURRENCY_META, ec);
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if (U_FAILURE(ec)) {
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// Config/build error; return hard-coded defaults
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return LAST_RESORT_DATA;
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}
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// Look up our currency, or if that's not available, then DEFAULT
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char buf[ISO_COUNTRY_CODE_LENGTH+1];
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ResourceBundle rb = currencyMeta.get(myUCharsToChars(buf, currency), ec);
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if (U_FAILURE(ec)) {
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rb = currencyMeta.get(DEFAULT_META, ec);
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if (U_FAILURE(ec)) {
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// Config/build error; return hard-coded defaults
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return LAST_RESORT_DATA;
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}
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}
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int32_t len;
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const int32_t *data = rb.getIntVector(len, ec);
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if (U_FAILURE(ec) || len < 2) {
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// Config/build error; return hard-coded defaults
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return LAST_RESORT_DATA;
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}
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return data;
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}
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// ------------------------------------------
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//
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// Registration
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//
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//-------------------------------------------
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// don't use ICUService since we don't need fallback
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struct CReg;
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/* Remember to call umtx_init(&gCRegLock) before using it! */
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static UMTX gCRegLock = 0;
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static CReg* gCRegHead = 0;
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struct CReg : public UMemory {
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CReg *next;
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UChar iso[ISO_COUNTRY_CODE_LENGTH+1];
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char id[ULOC_FULLNAME_CAPACITY];
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CReg(const UChar* _iso, const char* _id)
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: next(0)
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{
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int32_t len = uprv_strlen(_id);
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if (len > (int32_t)(sizeof(id)-1)) {
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len = (sizeof(id)-1);
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}
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uprv_strncpy(id, _id, len);
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id[len] = 0;
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uprv_memcpy(iso, _iso, ISO_COUNTRY_CODE_LENGTH * sizeof(const UChar));
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iso[ISO_COUNTRY_CODE_LENGTH] = 0;
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}
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static UCurrRegistryKey reg(const UChar* _iso, const char* _id, UErrorCode* status)
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{
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if (status && U_SUCCESS(*status) && _iso && _id) {
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CReg* n = new CReg(_iso, _id);
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if (n) {
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umtx_init(&gCRegLock);
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Mutex mutex(&gCRegLock);
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if (!gCRegHead) {
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ucln_i18n_registerCleanup();
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}
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n->next = gCRegHead;
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gCRegHead = n;
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return n;
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}
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*status = U_MEMORY_ALLOCATION_ERROR;
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}
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return 0;
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}
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static UBool unreg(UCurrRegistryKey key) {
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umtx_init(&gCRegLock);
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Mutex mutex(&gCRegLock);
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if (gCRegHead == key) {
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gCRegHead = gCRegHead->next;
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delete (CReg*)key;
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return TRUE;
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}
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CReg* p = gCRegHead;
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while (p) {
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if (p->next == key) {
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p->next = ((CReg*)key)->next;
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delete (CReg*)key;
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return TRUE;
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}
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p = p->next;
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}
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return FALSE;
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}
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static const UChar* get(const char* id) {
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umtx_init(&gCRegLock);
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Mutex mutex(&gCRegLock);
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CReg* p = gCRegHead;
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while (p) {
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if (uprv_strcmp(id, p->id) == 0) {
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return p->iso;
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}
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p = p->next;
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}
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return NULL;
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}
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/* This doesn't need to be thread safe. It's for u_cleanup only. */
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static void cleanup(void) {
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while (gCRegHead) {
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CReg* n = gCRegHead;
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gCRegHead = gCRegHead->next;
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delete n;
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}
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umtx_destroy(&gCRegLock);
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}
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};
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// -------------------------------------
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/**
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* @see VARIANT_IS_EURO
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* @see VARIANT_IS_PREEURO
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*/
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static uint32_t
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idForLocale(const char* locale, char* buffer, int capacity, UErrorCode* ec)
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{
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uint32_t variantType = 0;
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// !!! this is internal only, assumes buffer is not null and capacity is sufficient
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// Extract the country name and variant name. We only
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// recognize two variant names, EURO and PREEURO.
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char variant[ULOC_FULLNAME_CAPACITY];
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uloc_getCountry(locale, buffer, capacity, ec);
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uloc_getVariant(locale, variant, sizeof(variant), ec);
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if (variant[0] != 0) {
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variantType = (0 == uprv_strcmp(variant, VAR_EURO))
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| ((0 == uprv_strcmp(variant, VAR_PRE_EURO)) << 1);
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if (variantType)
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{
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uprv_strcat(buffer, VAR_DELIM);
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uprv_strcat(buffer, variant);
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}
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}
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return variantType;
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}
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// -------------------------------------
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U_CAPI UCurrRegistryKey U_EXPORT2
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ucurr_register(const UChar* isoCode, const char* locale, UErrorCode *status)
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{
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if (status && U_SUCCESS(*status)) {
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char id[ULOC_FULLNAME_CAPACITY];
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idForLocale(locale, id, sizeof(id), status);
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return CReg::reg(isoCode, id, status);
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}
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return NULL;
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}
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// -------------------------------------
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U_CAPI UBool U_EXPORT2
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ucurr_unregister(UCurrRegistryKey key, UErrorCode* status)
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{
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if (status && U_SUCCESS(*status)) {
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return CReg::unreg(key);
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}
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return FALSE;
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}
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// -------------------------------------
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U_CAPI const UChar* U_EXPORT2
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ucurr_forLocale(const char* locale, UErrorCode* ec) {
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if (ec != NULL && U_SUCCESS(*ec)) {
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UErrorCode localStatus = U_ZERO_ERROR;
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UResourceBundle *rb = NULL;
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UResourceBundle *cm = NULL;
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const UChar* s = NULL;
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char id[ULOC_FULLNAME_CAPACITY];
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int32_t currLen = 0;
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if(currLen = uloc_getKeywordValue(locale, "currency", id, ULOC_FULLNAME_CAPACITY, &localStatus)) {
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// there is a currency keyword. Try to see if it's valid
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if(currLen == 3) {
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rb = ures_open(NULL, "", &localStatus);
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cm = ures_getByKey(rb, "CurrencyCodes", NULL, &localStatus);
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s = ures_getStringByKey(cm, id, NULL, &localStatus);
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if(U_FAILURE(localStatus)) {
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s = NULL;
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*ec = localStatus;
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}
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}
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} else {
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uint32_t variantType = idForLocale(locale, id, sizeof(id), ec);
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if (U_FAILURE(*ec)) {
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return NULL;
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}
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const UChar* result = CReg::get(id);
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if (result) {
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return result;
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}
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// Look up the CurrencyMap element in the root bundle.
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rb = ures_open(NULL, "", &localStatus);
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cm = ures_getByKey(rb, CURRENCY_MAP, NULL, &localStatus);
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s = ures_getStringByKey(cm, id, NULL, &localStatus);
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if ((s == NULL || U_FAILURE(localStatus)) && variantType != VARIANT_IS_EMPTY
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&& (id[0] != 0))
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{
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// We don't know about it. Check to see if we support the variant.
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if (variantType & VARIANT_IS_EURO) {
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s = ures_getStringByKey(cm, VAR_DELIM_EURO, NULL, ec);
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}
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else {
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uloc_getParent(locale, id, sizeof(id), ec);
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*ec = U_USING_FALLBACK_WARNING;
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s = ucurr_forLocale(id, ec);
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}
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}
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else if (*ec == U_ZERO_ERROR || localStatus != U_ZERO_ERROR) {
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// There is nothing to fallback to. Report the failure/warning if possible.
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*ec = localStatus;
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}
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}
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ures_close(cm);
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ures_close(rb);
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if (U_SUCCESS(*ec)) {
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return s;
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}
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}
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return NULL;
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}
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// end registration
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/**
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* Modify the given locale name by removing the rightmost _-delimited
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* element. If there is none, empty the string ("" == root).
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* NOTE: The string "root" is not recognized; do not use it.
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* @return TRUE if the fallback happened; FALSE if locale is already
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* root ("").
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*/
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static UBool fallback(char *loc) {
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if (!*loc) {
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return FALSE;
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}
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UErrorCode status = U_ZERO_ERROR;
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uloc_getParent(loc, loc, uprv_strlen(loc), &status);
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/*
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char *i = uprv_strrchr(loc, '_');
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if (i == NULL) {
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i = loc;
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}
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*i = 0;
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*/
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return TRUE;
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}
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U_CAPI 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, // fillin
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int32_t* len, // fillin
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UErrorCode* ec) {
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// Look up the Currencies resource for the given locale. The
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// Currencies locale data looks like this:
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//|en {
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//| Currencies {
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//| USD { "US$", "US Dollar" }
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//| CHF { "Sw F", "Swiss Franc" }
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//| INR { "=0#Rs|1#Re|1<Rs", "=0#Rupees|1#Rupee|1<Rupees" }
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//| //...
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//| }
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//|}
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if (ec == NULL || U_FAILURE(*ec)) {
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return 0;
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}
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int32_t choice = (int32_t) nameStyle;
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if (choice < 0 || choice > 1) {
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*ec = U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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// In the future, resource bundles may implement multi-level
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// fallback. That is, if a currency is not found in the en_US
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// Currencies data, then the en Currencies data will be searched.
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// Currently, if a Currencies datum exists in en_US and en, the
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// en_US entry hides that in en.
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// We want multi-level fallback for this resource, so we implement
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// it manually.
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// Use a separate UErrorCode here that does not propagate out of
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// this function.
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UErrorCode ec2 = U_ZERO_ERROR;
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char loc[ULOC_FULLNAME_CAPACITY];
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uloc_getName(locale, loc, sizeof(loc), &ec2);
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if (U_FAILURE(ec2) || ec2 == U_STRING_NOT_TERMINATED_WARNING) {
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*ec = U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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char buf[ISO_COUNTRY_CODE_LENGTH+1];
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myUCharsToChars(buf, currency);
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const UChar* s = NULL;
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// Multi-level resource inheritance fallback loop
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for (;;) {
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ec2 = U_ZERO_ERROR;
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UResourceBundle* rb = ures_open(NULL, loc, &ec2);
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UResourceBundle* curr = ures_getByKey(rb, CURRENCIES, NULL, &ec2);
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UResourceBundle* names = ures_getByKey(curr, buf, NULL, &ec2);
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s = ures_getStringByIndex(names, choice, len, &ec2);
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ures_close(names);
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ures_close(curr);
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ures_close(rb);
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// If we've succeeded we're done. Otherwise, try to fallback.
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// If that fails (because we are already at root) then exit.
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if (U_SUCCESS(ec2) || !fallback(loc)) {
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break;
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}
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}
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// Determine if this is a ChoiceFormat pattern. One leading mark
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// indicates a ChoiceFormat. Two indicates a static string that
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// starts with a mark. In either case, the first mark is ignored,
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// if present. Marks in the rest of the string have no special
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// meaning.
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*isChoiceFormat = FALSE;
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if (U_SUCCESS(ec2)) {
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U_ASSERT(s != NULL);
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int32_t i=0;
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while (i < *len && s[i] == CHOICE_FORMAT_MARK && i < 2) {
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++i;
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}
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*isChoiceFormat = (i == 1);
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if (i != 0) ++s; // Skip over first mark
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return s;
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}
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// If we fail to find a match, use the ISO 4217 code
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*len = u_strlen(currency); // Should == ISO_COUNTRY_CODE_LENGTH, but maybe not...?
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return currency;
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}
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/**
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* Internal method. Given a currency ISO code and a locale, return
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* the "static" currency name. This is usually the same as the
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* UCURR_SYMBOL_NAME, but if the latter is a choice format, then the
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* format is applied to the number 2.0 (to yield the more common
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* plural) to return a static name.
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*
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* This is used for backward compatibility with old currency logic in
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* DecimalFormat and DecimalFormatSymbols.
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*/
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U_CAPI void
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uprv_getStaticCurrencyName(const UChar* iso, const char* loc,
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UnicodeString& result, UErrorCode& ec)
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{
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UBool isChoiceFormat;
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int32_t len;
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const UChar* currname = ucurr_getName(iso, loc, UCURR_SYMBOL_NAME,
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&isChoiceFormat, &len, &ec);
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if (U_SUCCESS(ec)) {
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// If this is a ChoiceFormat currency, then format an
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// arbitrary value; pick something != 1; more common.
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result.truncate(0);
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if (isChoiceFormat) {
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ChoiceFormat f(currname, ec);
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if (U_SUCCESS(ec)) {
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f.format(2.0, result);
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} else {
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result = iso;
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}
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} else {
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result = currname;
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}
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}
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}
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U_CAPI int32_t U_EXPORT2
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ucurr_getDefaultFractionDigits(const UChar* currency) {
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return (_findMetaData(currency))[0];
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}
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U_CAPI double U_EXPORT2
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ucurr_getRoundingIncrement(const UChar* currency) {
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const int32_t *data = _findMetaData(currency);
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// If there is no rounding, or if the meta data is invalid,
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// return 0.0 to indicate no rounding. A rounding value
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// (data[1]) of 0 or 1 indicates no rounding.
|
|
if (data[1] < 2 || data[0] < 0 || data[0] > MAX_POW10) {
|
|
return 0.0;
|
|
}
|
|
|
|
// Return data[1] / 10^(data[0]). The only actual rounding data,
|
|
// as of this writing, is CHF { 2, 5 }.
|
|
return double(data[1]) / POW10[data[0]];
|
|
}
|
|
|
|
/**
|
|
* Release all static memory held by currency.
|
|
*/
|
|
U_CFUNC UBool currency_cleanup(void) {
|
|
CReg::cleanup();
|
|
return TRUE;
|
|
}
|
|
|
|
#endif /* #if !UCONFIG_NO_FORMATTING */
|
|
|
|
//eof
|