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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:  unistr_titlecase_brkiter.cpp
      9 *   encoding:   US-ASCII
     10 *   tab size:   8 (not used)
     11 *   indentation:2
     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/unistr.h"
     27 #include "unicode/ustring.h"
     28 #include "cmemory.h"
     29 #include "ustr_imp.h"
     30 
     31 static int32_t U_CALLCONV
     32 unistr_case_internalToTitle(const UCaseMap *csm,
     33                             UChar *dest, int32_t destCapacity,
     34                             const UChar *src, int32_t srcLength,
     35                             UErrorCode *pErrorCode) {
     36   ubrk_setText(csm->iter, src, srcLength, pErrorCode);
     37   return ustrcase_internalToTitle(csm, dest, destCapacity, src, srcLength, pErrorCode);
     38 }
     39 
     40 /*
     41  * Set parameters on an empty UCaseMap, for UCaseMap-less API functions.
     42  * Do this fast because it is called with every function call.
     43  */
     44 static inline void
     45 setTempCaseMap(UCaseMap *csm, const char *locale) {
     46     if(csm->csp==NULL) {
     47         csm->csp=ucase_getSingleton();
     48     }
     49     if(locale!=NULL && locale[0]==0) {
     50         csm->locale[0]=0;
     51     } else {
     52         ustrcase_setTempCaseMapLocale(csm, locale);
     53     }
     54 }
     55 
     56 U_NAMESPACE_BEGIN
     57 
     58 UnicodeString &
     59 UnicodeString::toTitle(BreakIterator *titleIter) {
     60   return toTitle(titleIter, Locale::getDefault(), 0);
     61 }
     62 
     63 UnicodeString &
     64 UnicodeString::toTitle(BreakIterator *titleIter, const Locale &locale) {
     65   return toTitle(titleIter, locale, 0);
     66 }
     67 
     68 UnicodeString &
     69 UnicodeString::toTitle(BreakIterator *titleIter, const Locale &locale, uint32_t options) {
     70   UCaseMap csm=UCASEMAP_INITIALIZER;
     71   csm.options=options;
     72   setTempCaseMap(&csm, locale.getName());
     73   BreakIterator *bi=titleIter;
     74   if(bi==NULL) {
     75     UErrorCode errorCode=U_ZERO_ERROR;
     76     bi=BreakIterator::createWordInstance(locale, errorCode);
     77     if(U_FAILURE(errorCode)) {
     78       setToBogus();
     79       return *this;
     80     }
     81   }
     82   csm.iter=reinterpret_cast<UBreakIterator *>(bi);
     83   caseMap(&csm, unistr_case_internalToTitle);
     84   if(titleIter==NULL) {
     85     delete bi;
     86   }
     87   return *this;
     88 }
     89 
     90 U_NAMESPACE_END
     91 
     92 #endif  // !UCONFIG_NO_BREAK_ITERATION
     93