AuroraMiddleware/scuffed-code
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
30a6c4cc9c
scuffed-code/icu4c/source/i18n/ucurr.cpp
Ram Viswanadha 15bd863941 ICU-3925 various fixes 
X-SVN-Rev: 16159
2004-08-13 20:34:31 +00:00

710 lines
22 KiB
C++
Raw Blame History

/*
**********************************************************************
* Copyright (c) 2002-2004, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/ucurr.h"
#include "unicode/locid.h"
#include "unicode/resbund.h"
#include "unicode/ustring.h"
#include "unicode/choicfmt.h"
#include "unicode/parsepos.h"
#include "ustr_imp.h"
#include "cmemory.h"
#include "cstring.h"
#include "uassert.h"
#include "mutex.h"
#include "ucln_in.h"
//------------------------------------------------------------
// Constants
// Default currency meta data of last resort. We try to use the
// defaults encoded in the meta data resource bundle. If there is a
// configuration/build error and these are not available, we use these
// hard-coded defaults (which should be identical).
static const int32_t LAST_RESORT_DATA[] = { 2, 0 };
// POW10[i] = 10^i, i=0..MAX_POW10
static const int32_t POW10[] = { 1, 10, 100, 1000, 10000, 100000,
1000000, 10000000, 100000000, 1000000000 };
static const int32_t MAX_POW10 = (sizeof(POW10)/sizeof(POW10[0])) - 1;
#define ISO_COUNTRY_CODE_LENGTH 3
//------------------------------------------------------------
// Resource tags
//
static const char CURRENCY_DATA[] = "CurrencyData";
// Tag for meta-data, in root.
static const char CURRENCY_META[] = "CurrencyMeta";
// Tag for map from countries to currencies, in root.
static const char CURRENCY_MAP[] = "CurrencyMap";
// Tag for default meta-data, in CURRENCY_META
static const char DEFAULT_META[] = "DEFAULT";
// Variant for legacy pre-euro mapping in CurrencyMap
static const char VAR_PRE_EURO[] = "PREEURO";
// Variant for legacy euro mapping in CurrencyMap
static const char VAR_EURO[] = "EURO";
// Variant delimiter
static const char VAR_DELIM[] = "_";
// Variant for legacy euro mapping in CurrencyMap
static const char VAR_DELIM_EURO[] = "_EURO";
#define VARIANT_IS_EMPTY 0
#define VARIANT_IS_EURO 0x1
#define VARIANT_IS_PREEURO 0x2
// Tag for localized display names (symbols) of currencies
static const char CURRENCIES[] = "Currencies";
// Marker character indicating that a display name is a ChoiceFormat
// pattern. Strings that start with one mark are ChoiceFormat
// patterns. Strings that start with 2 marks are static strings, and
// the first mark is deleted.
static const UChar CHOICE_FORMAT_MARK = 0x003D; // Equals sign
//------------------------------------------------------------
// Code
/**
* Unfortunately, we have to convert the UChar* currency code to char*
* to use it as a resource key.
*/
static inline char*
myUCharsToChars(char* resultOfLen4, const UChar* currency) {
u_UCharsToChars(currency, resultOfLen4, ISO_COUNTRY_CODE_LENGTH);
resultOfLen4[ISO_COUNTRY_CODE_LENGTH] = 0;
return resultOfLen4;
}
/**
* Internal function to look up currency data. Result is an array of
* two integers. The first is the fraction digits. The second is the
* rounding increment, or 0 if none. The rounding increment is in
* units of 10^(-fraction_digits).
*/
static const int32_t*
_findMetaData(const UChar* currency, UErrorCode& ec) {
if (currency == 0 || *currency == 0) {
if (U_SUCCESS(ec)) {
ec = U_ILLEGAL_ARGUMENT_ERROR;
}
return LAST_RESORT_DATA;
}
// Get CurrencyMeta resource out of root locale file. [This may
// move out of the root locale file later; if it does, update this
// code.]
UResourceBundle* currencyData = ures_openDirect(NULL, CURRENCY_DATA, &ec);
UResourceBundle* currencyMeta = ures_getByKey(currencyData, CURRENCY_META, currencyData, &ec);
if (U_FAILURE(ec)) {
ures_close(currencyMeta);
// Config/build error; return hard-coded defaults
return LAST_RESORT_DATA;
}
// Look up our currency, or if that's not available, then DEFAULT
char buf[ISO_COUNTRY_CODE_LENGTH+1];
UErrorCode ec2 = U_ZERO_ERROR; // local error code: soft failure
UResourceBundle* rb = ures_getByKey(currencyMeta, myUCharsToChars(buf, currency), NULL, &ec2);
if (U_FAILURE(ec2)) {
ures_close(rb);
rb = ures_getByKey(currencyMeta,DEFAULT_META, NULL, &ec);
if (U_FAILURE(ec)) {
ures_close(currencyMeta);
ures_close(rb);
// Config/build error; return hard-coded defaults
return LAST_RESORT_DATA;
}
}
int32_t len;
const int32_t *data = ures_getIntVector(rb, &len, &ec);
if (U_FAILURE(ec) || len != 2) {
// Config/build error; return hard-coded defaults
if (U_SUCCESS(ec)) {
ec = U_INVALID_FORMAT_ERROR;
}
ures_close(currencyMeta);
ures_close(rb);
return LAST_RESORT_DATA;
}
ures_close(currencyMeta);
ures_close(rb);
return data;
}
// -------------------------------------
/**
* @see VARIANT_IS_EURO
* @see VARIANT_IS_PREEURO
*/
static uint32_t
idForLocale(const char* locale, char* countryAndVariant, int capacity, UErrorCode* ec)
{
uint32_t variantType = 0;
// !!! this is internal only, assumes buffer is not null and capacity is sufficient
// Extract the country name and variant name. We only
// recognize two variant names, EURO and PREEURO.
char variant[ULOC_FULLNAME_CAPACITY];
uloc_getCountry(locale, countryAndVariant, capacity, ec);
uloc_getVariant(locale, variant, sizeof(variant), ec);
if (variant[0] != 0) {
variantType = (0 == uprv_strcmp(variant, VAR_EURO))
| ((0 == uprv_strcmp(variant, VAR_PRE_EURO)) << 1);
if (variantType)
{
uprv_strcat(countryAndVariant, VAR_DELIM);
uprv_strcat(countryAndVariant, variant);
}
}
return variantType;
}
// ------------------------------------------
//
// Registration
//
//-------------------------------------------
// don't use ICUService since we don't need fallback
#if !UCONFIG_NO_SERVICE
struct CReg;
/* Remember to call umtx_init(&gCRegLock) before using it! */
static UMTX gCRegLock = 0;
static CReg* gCRegHead = 0;
struct CReg : public UMemory {
CReg *next;
UChar iso[ISO_COUNTRY_CODE_LENGTH+1];
char id[ULOC_FULLNAME_CAPACITY];
CReg(const UChar* _iso, const char* _id)
: next(0)
{
int32_t len = uprv_strlen(_id);
if (len > (int32_t)(sizeof(id)-1)) {
len = (sizeof(id)-1);
}
uprv_strncpy(id, _id, len);
id[len] = 0;
uprv_memcpy(iso, _iso, ISO_COUNTRY_CODE_LENGTH * sizeof(const UChar));
iso[ISO_COUNTRY_CODE_LENGTH] = 0;
}
static UCurrRegistryKey reg(const UChar* _iso, const char* _id, UErrorCode* status)
{
if (status && U_SUCCESS(*status) && _iso && _id) {
CReg* n = new CReg(_iso, _id);
if (n) {
umtx_init(&gCRegLock);
Mutex mutex(&gCRegLock);
if (!gCRegHead) {
/* register for the first time */
ucln_i18n_registerCleanup();
}
n->next = gCRegHead;
gCRegHead = n;
return n;
}
*status = U_MEMORY_ALLOCATION_ERROR;
}
return 0;
}
static UBool unreg(UCurrRegistryKey key) {
umtx_init(&gCRegLock);
Mutex mutex(&gCRegLock);
if (gCRegHead == key) {
gCRegHead = gCRegHead->next;
delete (CReg*)key;
return TRUE;
}
CReg* p = gCRegHead;
while (p) {
if (p->next == key) {
p->next = ((CReg*)key)->next;
delete (CReg*)key;
return TRUE;
}
p = p->next;
}
return FALSE;
}
static const UChar* get(const char* id) {
umtx_init(&gCRegLock);
Mutex mutex(&gCRegLock);
CReg* p = gCRegHead;
ucln_i18n_registerCleanup(); /* register cleanup of the mutex */
while (p) {
if (uprv_strcmp(id, p->id) == 0) {
return p->iso;
}
p = p->next;
}
return NULL;
}
/* This doesn't need to be thread safe. It's for u_cleanup only. */
static void cleanup(void) {
while (gCRegHead) {
CReg* n = gCRegHead;
gCRegHead = gCRegHead->next;
delete n;
}
umtx_destroy(&gCRegLock);
}
};
// -------------------------------------
U_CAPI UCurrRegistryKey U_EXPORT2
ucurr_register(const UChar* isoCode, const char* locale, UErrorCode *status)
{
if (status && U_SUCCESS(*status)) {
char id[ULOC_FULLNAME_CAPACITY];
idForLocale(locale, id, sizeof(id), status);
return CReg::reg(isoCode, id, status);
}
return NULL;
}
// -------------------------------------
U_CAPI UBool U_EXPORT2
ucurr_unregister(UCurrRegistryKey key, UErrorCode* status)
{
if (status && U_SUCCESS(*status)) {
return CReg::unreg(key);
}
return FALSE;
}
#endif /* UCONFIG_NO_SERVICE */
// -------------------------------------
U_CAPI int32_t U_EXPORT2
ucurr_forLocale(const char* locale,
UChar* buff,
int32_t buffCapacity,
UErrorCode* ec)
{
int32_t resLen = 0;
const UChar* s = NULL;
if (ec != NULL && U_SUCCESS(*ec)) {
if ((buff && buffCapacity) || !buffCapacity) {
UErrorCode localStatus = U_ZERO_ERROR;
char id[ULOC_FULLNAME_CAPACITY];
if ((resLen = uloc_getKeywordValue(locale, "currency", id, ULOC_FULLNAME_CAPACITY, &localStatus))) {
// there is a currency keyword. Try to see if it's valid
if(buffCapacity > resLen) {
u_charsToUChars(id, buff, resLen);
}
} else {
// get country or country_variant in `id'
uint32_t variantType = idForLocale(locale, id, sizeof(id), ec);
if (U_FAILURE(*ec)) {
return 0;
}
#if !UCONFIG_NO_SERVICE
const UChar* result = CReg::get(id);
if (result) {
if(buffCapacity > u_strlen(result)) {
u_strcpy(buff, result);
}
return u_strlen(result);
}
#endif
// Look up the CurrencyMap element in the root bundle.
UResourceBundle *rb = ures_openDirect(NULL, CURRENCY_DATA, &localStatus);
UResourceBundle *cm = ures_getByKey(rb, CURRENCY_MAP, rb, &localStatus);
s = ures_getStringByKey(cm, id, &resLen, &localStatus);
if ((s == NULL || U_FAILURE(localStatus)) && variantType != VARIANT_IS_EMPTY
&& (id[0] != 0))
{
// We don't know about it. Check to see if we support the variant.
if (variantType & VARIANT_IS_EURO) {
s = ures_getStringByKey(cm, VAR_DELIM_EURO, &resLen, ec);
}
else {
uloc_getParent(locale, id, sizeof(id), ec);
*ec = U_USING_FALLBACK_WARNING;
ures_close(cm);
return ucurr_forLocale(id, buff, buffCapacity, ec);
}
}
else if (*ec == U_ZERO_ERROR || localStatus != U_ZERO_ERROR) {
// There is nothing to fallback to. Report the failure/warning if possible.
*ec = localStatus;
}
if (U_SUCCESS(*ec)) {
if(buffCapacity > resLen) {
u_strcpy(buff, s);
}
}
ures_close(cm);
}
return u_terminateUChars(buff, buffCapacity, resLen, ec);
} else {
*ec = U_ILLEGAL_ARGUMENT_ERROR;
}
}
return resLen;
}
// end registration
/**
* Modify the given locale name by removing the rightmost _-delimited
* element. If there is none, empty the string ("" == root).
* NOTE: The string "root" is not recognized; do not use it.
* @return TRUE if the fallback happened; FALSE if locale is already
* root ("").
*/
static UBool fallback(char *loc) {
if (!*loc) {
return FALSE;
}
UErrorCode status = U_ZERO_ERROR;
uloc_getParent(loc, loc, uprv_strlen(loc), &status);
/*
char *i = uprv_strrchr(loc, '_');
if (i == NULL) {
i = loc;
}
*i = 0;
*/
return TRUE;
}
U_CAPI const UChar* U_EXPORT2
ucurr_getName(const UChar* currency,
const char* locale,
UCurrNameStyle nameStyle,
UBool* isChoiceFormat, // fillin
int32_t* len, // fillin
UErrorCode* ec) {
// Look up the Currencies resource for the given locale. The
// Currencies locale data looks like this:
//|en {
//| Currencies {
//| USD { "US$", "US Dollar" }
//| CHF { "Sw F", "Swiss Franc" }
//| INR { "=0#Rs|1#Re|1<Rs", "=0#Rupees|1#Rupee|1<Rupees" }
//| //...
//| }
//|}
if (U_FAILURE(*ec)) {
return 0;
}
int32_t choice = (int32_t) nameStyle;
if (choice < 0 || choice > 1) {
*ec = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
// In the future, resource bundles may implement multi-level
// fallback. That is, if a currency is not found in the en_US
// Currencies data, then the en Currencies data will be searched.
// Currently, if a Currencies datum exists in en_US and en, the
// en_US entry hides that in en.
// We want multi-level fallback for this resource, so we implement
// it manually.
// Use a separate UErrorCode here that does not propagate out of
// this function.
UErrorCode ec2 = U_ZERO_ERROR;
char loc[ULOC_FULLNAME_CAPACITY];
uloc_getName(locale, loc, sizeof(loc), &ec2);
if (U_FAILURE(ec2) || ec2 == U_STRING_NOT_TERMINATED_WARNING) {
*ec = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
char buf[ISO_COUNTRY_CODE_LENGTH+1];
myUCharsToChars(buf, currency);
const UChar* s = NULL;
// Multi-level resource inheritance fallback loop
for (;;) {
ec2 = U_ZERO_ERROR;
UResourceBundle* rb = ures_open(NULL, loc, &ec2);
rb = ures_getByKey(rb, CURRENCIES, rb, &ec2);
rb = ures_getByKey(rb, buf, rb, &ec2);
s = ures_getStringByIndex(rb, choice, len, &ec2);
ures_close(rb);
// If we've succeeded we're done. Otherwise, try to fallback.
// If that fails (because we are already at root) then exit.
if (U_SUCCESS(ec2) || !fallback(loc)) {
break;
}
}
// Determine if this is a ChoiceFormat pattern. One leading mark
// indicates a ChoiceFormat. Two indicates a static string that
// starts with a mark. In either case, the first mark is ignored,
// if present. Marks in the rest of the string have no special
// meaning.
*isChoiceFormat = FALSE;
if (U_SUCCESS(ec2)) {
U_ASSERT(s != NULL);
int32_t i=0;
while (i < *len && s[i] == CHOICE_FORMAT_MARK && i < 2) {
++i;
}
*isChoiceFormat = (i == 1);
if (i != 0) ++s; // Skip over first mark
return s;
}
// If we fail to find a match, use the ISO 4217 code
*len = u_strlen(currency); // Should == ISO_COUNTRY_CODE_LENGTH, but maybe not...?
return currency;
}
U_NAMESPACE_BEGIN
void
uprv_parseCurrency(const char* locale,
const UnicodeString& text,
ParsePosition& pos,
UChar* result,
UErrorCode& ec) {
// TODO: There is a slight problem with the pseudo-multi-level
// fallback implemented here. More-specific locales don't
// properly shield duplicate entries in less-specific locales.
// This problem will go away when real multi-level fallback is
// implemented. We could also fix this by recording (in a
// hash) which codes are used at each level of fallback, but
// this doesn't seem warranted.
if (U_FAILURE(ec)) {
return;
}
// Look up the Currencies resource for the given locale. The
// Currencies locale data looks like this:
//|en {
//| Currencies {
//| USD { "US$", "US Dollar" }
//| CHF { "Sw F", "Swiss Franc" }
//| INR { "=0#Rs|1#Re|1<Rs", "=0#Rupees|1#Rupee|1<Rupees" }
//| //...
//| }
//|}
// In the future, resource bundles may implement multi-level
// fallback. That is, if a currency is not found in the en_US
// Currencies data, then the en Currencies data will be searched.
// Currently, if a Currencies datum exists in en_US and en, the
// en_US entry hides that in en.
// We want multi-level fallback for this resource, so we implement
// it manually.
// Use a separate UErrorCode here that does not propagate out of
// this function.
UErrorCode ec2 = U_ZERO_ERROR;
char loc[ULOC_FULLNAME_CAPACITY];
uloc_getName(locale, loc, sizeof(loc), &ec2);
if (U_FAILURE(ec2) || ec2 == U_STRING_NOT_TERMINATED_WARNING) {
ec = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
int32_t start = pos.getIndex();
const UChar* s = NULL;
const char* iso = NULL;
int32_t max = 0;
// Multi-level resource inheritance fallback loop
for (;;) {
ec2 = U_ZERO_ERROR;
UResourceBundle* rb = ures_open(NULL, loc, &ec2);
UResourceBundle* curr = ures_getByKey(rb, CURRENCIES, NULL, &ec2);
int32_t n = ures_getSize(curr);
for (int32_t i=0; i<n; ++i) {
UResourceBundle* names = ures_getByIndex(curr, i, NULL, &ec2);
int32_t len;
s = ures_getStringByIndex(names, UCURR_SYMBOL_NAME, &len, &ec2);
UBool isChoice = FALSE;
if (len > 0 && s[0] == CHOICE_FORMAT_MARK) {
++s;
--len;
if (len > 0 && s[0] != CHOICE_FORMAT_MARK) {
isChoice = TRUE;
}
}
if (isChoice) {
Formattable temp;
ChoiceFormat fmt(s, ec2);
fmt.parse(text, temp, pos);
len = pos.getIndex() - start;
pos.setIndex(start);
} else if (len > max &&
text.compare(pos.getIndex(), len, s) != 0) {
len = 0;
}
if (len > max) {
iso = ures_getKey(names);
max = len;
}
ures_close(names);
}
ures_close(curr);
ures_close(rb);
// Try to fallback. If that fails (because we are already at
// root) then exit.
if (!fallback(loc)) {
break;
}
}
if (iso != NULL) {
u_charsToUChars(iso, result, 4);
}
// If display name parse fails or if it matches fewer than 3
// characters, try to parse 3-letter ISO. Do this after the
// display name processing so 3-letter display names are
// preferred. Consider /[A-Z]{3}/ to be valid ISO, and parse
// it manually--UnicodeSet/regex are too slow and heavy.
if (max < 3 && (text.length() - start) >= 3) {
UBool valid = TRUE;
for (int32_t k=0; k<3; ++k) {
UChar ch = text.charAt(start + k); // 16-bit ok
if (ch < 0x41/*'A'*/ || ch > 0x5A/*'Z'*/) {
valid = FALSE;
break;
}
}
if (valid) {
text.extract(start, 3, result);
result[3] = 0;
max = 3;
}
}
pos.setIndex(start + max);
}
U_NAMESPACE_END
/**
* Internal method. Given a currency ISO code and a locale, return
* the "static" currency name. This is usually the same as the
* UCURR_SYMBOL_NAME, but if the latter is a choice format, then the
* format is applied to the number 2.0 (to yield the more common
* plural) to return a static name.
*
* This is used for backward compatibility with old currency logic in
* DecimalFormat and DecimalFormatSymbols.
*/
U_CAPI void
uprv_getStaticCurrencyName(const UChar* iso, const char* loc,
UnicodeString& result, UErrorCode& ec)
{
UBool isChoiceFormat;
int32_t len;
const UChar* currname = ucurr_getName(iso, loc, UCURR_SYMBOL_NAME,
&isChoiceFormat, &len, &ec);
if (U_SUCCESS(ec)) {
// If this is a ChoiceFormat currency, then format an
// arbitrary value; pick something != 1; more common.
result.truncate(0);
if (isChoiceFormat) {
ChoiceFormat f(currname, ec);
if (U_SUCCESS(ec)) {
f.format(2.0, result);
} else {
result = iso;
}
} else {
result = currname;
}
}
}
U_CAPI int32_t U_EXPORT2
ucurr_getDefaultFractionDigits(const UChar* currency, UErrorCode* ec) {
return (_findMetaData(currency, *ec))[0];
}
U_CAPI double U_EXPORT2
ucurr_getRoundingIncrement(const UChar* currency, UErrorCode* ec) {
const int32_t *data = _findMetaData(currency, *ec);
// If the meta data is invalid, return 0.0.
if (data[0] < 0 || data[0] > MAX_POW10) {
if (U_SUCCESS(*ec)) {
*ec = U_INVALID_FORMAT_ERROR;
}
return 0.0;
}
// If there is no rounding, return 0.0 to indicate no rounding. A
// rounding value (data[1]) of 0 or 1 indicates no rounding.
if (data[1] < 2) {
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) {
#if !UCONFIG_NO_SERVICE
CReg::cleanup();
#endif
return TRUE;
}
#endif /* #if !UCONFIG_NO_FORMATTING */
//eof
Reference in New Issue View Git Blame Copy Permalink