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      1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
      2 // License & terms of use: http://www.unicode.org/copyright.html
      3 /*
      4 *******************************************************************************
      5 *   Copyright (C) 2011, International Business Machines
      6 *   Corporation and others.  All Rights Reserved.
      7 *******************************************************************************
      8 *   file name:  ustr_titlecase_brkiter.cpp
      9 *   encoding:   US-ASCII
     10 *   tab size:   8 (not used)
     11 *   indentation:4
     12 *
     13 *   created on: 2011may30
     14 *   created by: Markus W. Scherer
     15 *
     16 *   Titlecasing functions that are based on BreakIterator
     17 *   were moved here to break dependency cycles among parts of the common library.
     18 */
     19 
     20 #include "unicode/utypes.h"
     21 
     22 #if !UCONFIG_NO_BREAK_ITERATION
     23 
     24 #include "unicode/brkiter.h"
     25 #include "unicode/ubrk.h"
     26 #include "unicode/ucasemap.h"
     27 #include "cmemory.h"
     28 #include "ucase.h"
     29 #include "ustr_imp.h"
     30 
     31 /* functions available in the common library (for unistr_case.cpp) */
     32 
     33 /*
     34  * Set parameters on an empty UCaseMap, for UCaseMap-less API functions.
     35  * Do this fast because it is called with every function call.
     36  * Duplicate of the same function in ustrcase.cpp, to keep it inline.
     37  */
     38 static inline void
     39 setTempCaseMap(UCaseMap *csm, const char *locale) {
     40     if(csm->csp==NULL) {
     41         csm->csp=ucase_getSingleton();
     42     }
     43     if(locale!=NULL && locale[0]==0) {
     44         csm->locale[0]=0;
     45     } else {
     46         ustrcase_setTempCaseMapLocale(csm, locale);
     47     }
     48 }
     49 
     50 /* public API functions */
     51 
     52 U_CAPI int32_t U_EXPORT2
     53 u_strToTitle(UChar *dest, int32_t destCapacity,
     54              const UChar *src, int32_t srcLength,
     55              UBreakIterator *titleIter,
     56              const char *locale,
     57              UErrorCode *pErrorCode) {
     58     UCaseMap csm=UCASEMAP_INITIALIZER;
     59     setTempCaseMap(&csm, locale);
     60     if(titleIter!=NULL) {
     61         ubrk_setText(csm.iter=titleIter, src, srcLength, pErrorCode);
     62     } else {
     63         csm.iter=ubrk_open(UBRK_WORD, csm.locale, src, srcLength, pErrorCode);
     64     }
     65     int32_t length=ustrcase_map(
     66         &csm,
     67         dest, destCapacity,
     68         src, srcLength,
     69         ustrcase_internalToTitle, pErrorCode);
     70     if(titleIter==NULL && csm.iter!=NULL) {
     71         ubrk_close(csm.iter);
     72     }
     73     return length;
     74 }
     75 
     76 U_CAPI int32_t U_EXPORT2
     77 ucasemap_toTitle(UCaseMap *csm,
     78                  UChar *dest, int32_t destCapacity,
     79                  const UChar *src, int32_t srcLength,
     80                  UErrorCode *pErrorCode) {
     81     if(csm->iter!=NULL) {
     82         ubrk_setText(csm->iter, src, srcLength, pErrorCode);
     83     } else {
     84         csm->iter=ubrk_open(UBRK_WORD, csm->locale, src, srcLength, pErrorCode);
     85     }
     86     return ustrcase_map(
     87         csm,
     88         dest, destCapacity,
     89         src, srcLength,
     90         ustrcase_internalToTitle, pErrorCode);
     91 }
     92 
     93 #endif  // !UCONFIG_NO_BREAK_ITERATION
     94