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/*
*******************************************************************************
* Copyright (C) 2011, International Business Machines
* Corporation and others. All Rights Reserved.
*******************************************************************************
* file name: ustrcase_locale.cpp
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* created on: 2011may31
* created by: Markus W. Scherer
*
* Locale-sensitive case mapping functions (ones that call uloc_getDefault())
* were moved here to break dependency cycles among parts of the common library.
*/
#include "unicode/utypes.h"
#include "unicode/ucasemap.h"
#include "unicode/uloc.h"
#include "unicode/ustring.h"
#include "ucase.h"
#include "ustr_imp.h"
U_CFUNC void
ustrcase_setTempCaseMapLocale(UCaseMap *csm, const char *locale) {
/*
* We could call ucasemap_setLocale(), but here we really only care about
* the initial language subtag, we need not return the real string via
* ucasemap_getLocale(), and we don't care about only getting "x" from
* "x-some-thing" etc.
*
* We ignore locales with a longer-than-3 initial subtag.
*
* We also do not fill in the locCache because it is rarely used,
* and not worth setting unless we reuse it for many case mapping operations.
* (That's why UCaseMap was created.)
*/
int i;
char c;
/* the internal functions require locale!=NULL */
if(locale==NULL) {
// Do not call uprv_getDefaultLocaleID() because that does not see
// changes to the default locale via uloc_setDefault().
// It would also be inefficient if used frequently because uprv_getDefaultLocaleID()
// does not cache the locale ID.
//
// Unfortunately, uloc_getDefault() has many dependencies.
// We only care about a small set of language subtags,
// and we do not need the locale ID to be canonicalized.
//
// Best is to not call case mapping functions with a NULL locale ID.
locale=uloc_getDefault();
}
for(i=0; i<4 && (c=locale[i])!=0 && c!='-' && c!='_'; ++i) {
csm->locale[i]=c;
}
if(i<=3) {
csm->locale[i]=0; /* Up to 3 non-separator characters. */
} else {
csm->locale[0]=0; /* Longer-than-3 initial subtag: Ignore. */
}
}
/*
* Set parameters on an empty UCaseMap, for UCaseMap-less API functions.
* Do this fast because it is called with every function call.
*/
static inline void
setTempCaseMap(UCaseMap *csm, const char *locale) {
if(csm->csp==NULL) {
csm->csp=ucase_getSingleton();
}
if(locale!=NULL && locale[0]==0) {
csm->locale[0]=0;
} else {
ustrcase_setTempCaseMapLocale(csm, locale);
}
}
/* public API functions */
U_CAPI int32_t U_EXPORT2
u_strToLower(UChar *dest, int32_t destCapacity,
const UChar *src, int32_t srcLength,
const char *locale,
UErrorCode *pErrorCode) {
UCaseMap csm=UCASEMAP_INITIALIZER;
setTempCaseMap(&csm, locale);
return ustrcase_map(
&csm,
dest, destCapacity,
src, srcLength,
ustrcase_internalToLower, pErrorCode);
}
U_CAPI int32_t U_EXPORT2
u_strToUpper(UChar *dest, int32_t destCapacity,
const UChar *src, int32_t srcLength,
const char *locale,
UErrorCode *pErrorCode) {
UCaseMap csm=UCASEMAP_INITIALIZER;
setTempCaseMap(&csm, locale);
return ustrcase_map(
&csm,
dest, destCapacity,
src, srcLength,
ustrcase_internalToUpper, pErrorCode);
}
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