1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/intl/icu/source/common/ustrcase_locale.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,110 @@
1.4 +/*
1.5 +*******************************************************************************
1.6 +* Copyright (C) 2011, International Business Machines
1.7 +* Corporation and others. All Rights Reserved.
1.8 +*******************************************************************************
1.9 +* file name: ustrcase_locale.cpp
1.10 +* encoding: US-ASCII
1.11 +* tab size: 8 (not used)
1.12 +* indentation:4
1.13 +*
1.14 +* created on: 2011may31
1.15 +* created by: Markus W. Scherer
1.16 +*
1.17 +* Locale-sensitive case mapping functions (ones that call uloc_getDefault())
1.18 +* were moved here to break dependency cycles among parts of the common library.
1.19 +*/
1.20 +
1.21 +#include "unicode/utypes.h"
1.22 +#include "unicode/ucasemap.h"
1.23 +#include "unicode/uloc.h"
1.24 +#include "unicode/ustring.h"
1.25 +#include "ucase.h"
1.26 +#include "ustr_imp.h"
1.27 +
1.28 +U_CFUNC void
1.29 +ustrcase_setTempCaseMapLocale(UCaseMap *csm, const char *locale) {
1.30 + /*
1.31 + * We could call ucasemap_setLocale(), but here we really only care about
1.32 + * the initial language subtag, we need not return the real string via
1.33 + * ucasemap_getLocale(), and we don't care about only getting "x" from
1.34 + * "x-some-thing" etc.
1.35 + *
1.36 + * We ignore locales with a longer-than-3 initial subtag.
1.37 + *
1.38 + * We also do not fill in the locCache because it is rarely used,
1.39 + * and not worth setting unless we reuse it for many case mapping operations.
1.40 + * (That's why UCaseMap was created.)
1.41 + */
1.42 + int i;
1.43 + char c;
1.44 +
1.45 + /* the internal functions require locale!=NULL */
1.46 + if(locale==NULL) {
1.47 + // Do not call uprv_getDefaultLocaleID() because that does not see
1.48 + // changes to the default locale via uloc_setDefault().
1.49 + // It would also be inefficient if used frequently because uprv_getDefaultLocaleID()
1.50 + // does not cache the locale ID.
1.51 + //
1.52 + // Unfortunately, uloc_getDefault() has many dependencies.
1.53 + // We only care about a small set of language subtags,
1.54 + // and we do not need the locale ID to be canonicalized.
1.55 + //
1.56 + // Best is to not call case mapping functions with a NULL locale ID.
1.57 + locale=uloc_getDefault();
1.58 + }
1.59 + for(i=0; i<4 && (c=locale[i])!=0 && c!='-' && c!='_'; ++i) {
1.60 + csm->locale[i]=c;
1.61 + }
1.62 + if(i<=3) {
1.63 + csm->locale[i]=0; /* Up to 3 non-separator characters. */
1.64 + } else {
1.65 + csm->locale[0]=0; /* Longer-than-3 initial subtag: Ignore. */
1.66 + }
1.67 +}
1.68 +
1.69 +/*
1.70 + * Set parameters on an empty UCaseMap, for UCaseMap-less API functions.
1.71 + * Do this fast because it is called with every function call.
1.72 + */
1.73 +static inline void
1.74 +setTempCaseMap(UCaseMap *csm, const char *locale) {
1.75 + if(csm->csp==NULL) {
1.76 + csm->csp=ucase_getSingleton();
1.77 + }
1.78 + if(locale!=NULL && locale[0]==0) {
1.79 + csm->locale[0]=0;
1.80 + } else {
1.81 + ustrcase_setTempCaseMapLocale(csm, locale);
1.82 + }
1.83 +}
1.84 +
1.85 +/* public API functions */
1.86 +
1.87 +U_CAPI int32_t U_EXPORT2
1.88 +u_strToLower(UChar *dest, int32_t destCapacity,
1.89 + const UChar *src, int32_t srcLength,
1.90 + const char *locale,
1.91 + UErrorCode *pErrorCode) {
1.92 + UCaseMap csm=UCASEMAP_INITIALIZER;
1.93 + setTempCaseMap(&csm, locale);
1.94 + return ustrcase_map(
1.95 + &csm,
1.96 + dest, destCapacity,
1.97 + src, srcLength,
1.98 + ustrcase_internalToLower, pErrorCode);
1.99 +}
1.100 +
1.101 +U_CAPI int32_t U_EXPORT2
1.102 +u_strToUpper(UChar *dest, int32_t destCapacity,
1.103 + const UChar *src, int32_t srcLength,
1.104 + const char *locale,
1.105 + UErrorCode *pErrorCode) {
1.106 + UCaseMap csm=UCASEMAP_INITIALIZER;
1.107 + setTempCaseMap(&csm, locale);
1.108 + return ustrcase_map(
1.109 + &csm,
1.110 + dest, destCapacity,
1.111 + src, srcLength,
1.112 + ustrcase_internalToUpper, pErrorCode);
1.113 +}
