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comparison: intl/icu/source/common/ustrcase_locale.cpp
intl/icu/source/common/ustrcase_locale.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:7c856f673853 |
|---|---|
| 1 /* | |
| 2 ******************************************************************************* | |
| 3 * Copyright (C) 2011, International Business Machines | |
| 4 * Corporation and others. All Rights Reserved. | |
| 5 ******************************************************************************* | |
| 6 * file name: ustrcase_locale.cpp | |
| 7 * encoding: US-ASCII | |
| 8 * tab size: 8 (not used) | |
| 9 * indentation:4 | |
| 10 * | |
| 11 * created on: 2011may31 | |
| 12 * created by: Markus W. Scherer | |
| 13 * | |
| 14 * Locale-sensitive case mapping functions (ones that call uloc_getDefault()) | |
| 15 * were moved here to break dependency cycles among parts of the common library. | |
| 16 */ | |
| 17 | |
| 18 #include "unicode/utypes.h" | |
| 19 #include "unicode/ucasemap.h" | |
| 20 #include "unicode/uloc.h" | |
| 21 #include "unicode/ustring.h" | |
| 22 #include "ucase.h" | |
| 23 #include "ustr_imp.h" | |
| 24 | |
| 25 U_CFUNC void | |
| 26 ustrcase_setTempCaseMapLocale(UCaseMap *csm, const char *locale) { | |
| 27 /* | |
| 28 * We could call ucasemap_setLocale(), but here we really only care about | |
| 29 * the initial language subtag, we need not return the real string via | |
| 30 * ucasemap_getLocale(), and we don't care about only getting "x" from | |
| 31 * "x-some-thing" etc. | |
| 32 * | |
| 33 * We ignore locales with a longer-than-3 initial subtag. | |
| 34 * | |
| 35 * We also do not fill in the locCache because it is rarely used, | |
| 36 * and not worth setting unless we reuse it for many case mapping operations. | |
| 37 * (That's why UCaseMap was created.) | |
| 38 */ | |
| 39 int i; | |
| 40 char c; | |
| 41 | |
| 42 /* the internal functions require locale!=NULL */ | |
| 43 if(locale==NULL) { | |
| 44 // Do not call uprv_getDefaultLocaleID() because that does not see | |
| 45 // changes to the default locale via uloc_setDefault(). | |
| 46 // It would also be inefficient if used frequently because uprv_getDefaultLocaleID() | |
| 47 // does not cache the locale ID. | |
| 48 // | |
| 49 // Unfortunately, uloc_getDefault() has many dependencies. | |
| 50 // We only care about a small set of language subtags, | |
| 51 // and we do not need the locale ID to be canonicalized. | |
| 52 // | |
| 53 // Best is to not call case mapping functions with a NULL locale ID. | |
| 54 locale=uloc_getDefault(); | |
| 55 } | |
| 56 for(i=0; i<4 && (c=locale[i])!=0 && c!='-' && c!='_'; ++i) { | |
| 57 csm->locale[i]=c; | |
| 58 } | |
| 59 if(i<=3) { | |
| 60 csm->locale[i]=0; /* Up to 3 non-separator characters. */ | |
| 61 } else { | |
| 62 csm->locale[0]=0; /* Longer-than-3 initial subtag: Ignore. */ | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 /* | |
| 67 * Set parameters on an empty UCaseMap, for UCaseMap-less API functions. | |
| 68 * Do this fast because it is called with every function call. | |
| 69 */ | |
| 70 static inline void | |
| 71 setTempCaseMap(UCaseMap *csm, const char *locale) { | |
| 72 if(csm->csp==NULL) { | |
| 73 csm->csp=ucase_getSingleton(); | |
| 74 } | |
| 75 if(locale!=NULL && locale[0]==0) { | |
| 76 csm->locale[0]=0; | |
| 77 } else { | |
| 78 ustrcase_setTempCaseMapLocale(csm, locale); | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 /* public API functions */ | |
| 83 | |
| 84 U_CAPI int32_t U_EXPORT2 | |
| 85 u_strToLower(UChar *dest, int32_t destCapacity, | |
| 86 const UChar *src, int32_t srcLength, | |
| 87 const char *locale, | |
| 88 UErrorCode *pErrorCode) { | |
| 89 UCaseMap csm=UCASEMAP_INITIALIZER; | |
| 90 setTempCaseMap(&csm, locale); | |
| 91 return ustrcase_map( | |
| 92 &csm, | |
| 93 dest, destCapacity, | |
| 94 src, srcLength, | |
| 95 ustrcase_internalToLower, pErrorCode); | |
| 96 } | |
| 97 | |
| 98 U_CAPI int32_t U_EXPORT2 | |
| 99 u_strToUpper(UChar *dest, int32_t destCapacity, | |
| 100 const UChar *src, int32_t srcLength, | |
| 101 const char *locale, | |
| 102 UErrorCode *pErrorCode) { | |
| 103 UCaseMap csm=UCASEMAP_INITIALIZER; | |
| 104 setTempCaseMap(&csm, locale); | |
| 105 return ustrcase_map( | |
| 106 &csm, | |
| 107 dest, destCapacity, | |
| 108 src, srcLength, | |
| 109 ustrcase_internalToUpper, pErrorCode); | |
| 110 } |
