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      1 //  2016 and later: Unicode, Inc. and others.
      2 // License & terms of use: http://www.unicode.org/copyright.html
      3 /*
      4 *******************************************************************************
      5 * Copyright (C) 2009-2013, International Business Machines Corporation and    *
      6 * others. All Rights Reserved.                                                *
      7 *******************************************************************************
      8 *
      9 * This file contains the class SimpleDateFormatStaticSets
     10 *
     11 * SimpleDateFormatStaticSets holds the UnicodeSets that are needed for lenient
     12 * parsing of literal characters in date/time strings.
     13 ********************************************************************************
     14 */
     15 
     16 #include "unicode/utypes.h"
     17 
     18 #if !UCONFIG_NO_FORMATTING
     19 
     20 #include "unicode/uniset.h"
     21 #include "unicode/udat.h"
     22 #include "cmemory.h"
     23 #include "uassert.h"
     24 #include "ucln_in.h"
     25 #include "umutex.h"
     26 
     27 
     28 #include "smpdtfst.h"
     29 
     30 U_NAMESPACE_BEGIN
     31 
     32 SimpleDateFormatStaticSets *gStaticSets = NULL;
     33 UInitOnce gSimpleDateFormatStaticSetsInitOnce = U_INITONCE_INITIALIZER;
     34 
     35 SimpleDateFormatStaticSets::SimpleDateFormatStaticSets(UErrorCode &status)
     36 : fDateIgnorables(NULL),
     37   fTimeIgnorables(NULL),
     38   fOtherIgnorables(NULL)
     39 {
     40     fDateIgnorables  = new UnicodeSet(UNICODE_STRING("[-,./[:whitespace:]]", 20), status);
     41     fTimeIgnorables  = new UnicodeSet(UNICODE_STRING("[-.:[:whitespace:]]", 19),  status);
     42     fOtherIgnorables = new UnicodeSet(UNICODE_STRING("[:whitespace:]", 14),       status);
     43 
     44     // Check for null pointers
     45     if (fDateIgnorables == NULL || fTimeIgnorables == NULL || fOtherIgnorables == NULL) {
     46         goto ExitConstrDeleteAll;
     47     }
     48 
     49     // Freeze all the sets
     50     fDateIgnorables->freeze();
     51     fTimeIgnorables->freeze();
     52     fOtherIgnorables->freeze();
     53 
     54     return; // If we reached this point, everything is fine so just exit
     55 
     56 ExitConstrDeleteAll: // Remove all sets and return error
     57     delete fDateIgnorables;  fDateIgnorables = NULL;
     58     delete fTimeIgnorables;  fTimeIgnorables = NULL;
     59     delete fOtherIgnorables; fOtherIgnorables = NULL;
     60 
     61     status = U_MEMORY_ALLOCATION_ERROR;
     62 }
     63 
     64 
     65 SimpleDateFormatStaticSets::~SimpleDateFormatStaticSets() {
     66     delete fDateIgnorables;  fDateIgnorables = NULL;
     67     delete fTimeIgnorables;  fTimeIgnorables = NULL;
     68     delete fOtherIgnorables; fOtherIgnorables = NULL;
     69 }
     70 
     71 
     72 //------------------------------------------------------------------------------
     73 //
     74 //   smpdtfmt_cleanup     Memory cleanup function, free/delete all
     75 //                      cached memory.  Called by ICU's u_cleanup() function.
     76 //
     77 //------------------------------------------------------------------------------
     78 UBool
     79 SimpleDateFormatStaticSets::cleanup(void)
     80 {
     81     delete gStaticSets;
     82     gStaticSets = NULL;
     83     gSimpleDateFormatStaticSetsInitOnce.reset();
     84     return TRUE;
     85 }
     86 
     87 U_CDECL_BEGIN
     88 static UBool U_CALLCONV
     89 smpdtfmt_cleanup(void)
     90 {
     91     return SimpleDateFormatStaticSets::cleanup();
     92 }
     93 
     94 static void U_CALLCONV smpdtfmt_initSets(UErrorCode &status) {
     95     ucln_i18n_registerCleanup(UCLN_I18N_SMPDTFMT, smpdtfmt_cleanup);
     96     U_ASSERT(gStaticSets == NULL);
     97     gStaticSets = new SimpleDateFormatStaticSets(status);
     98     if (gStaticSets == NULL) {
     99         status = U_MEMORY_ALLOCATION_ERROR;
    100         return;
    101     }
    102 }
    103 
    104 U_CDECL_END
    105 
    106 UnicodeSet *SimpleDateFormatStaticSets::getIgnorables(UDateFormatField fieldIndex)
    107 {
    108     UErrorCode status = U_ZERO_ERROR;
    109     umtx_initOnce(gSimpleDateFormatStaticSetsInitOnce, &smpdtfmt_initSets, status);
    110     if (U_FAILURE(status)) {
    111         return NULL;
    112     }
    113 
    114     switch (fieldIndex) {
    115         case UDAT_YEAR_FIELD:
    116         case UDAT_MONTH_FIELD:
    117         case UDAT_DATE_FIELD:
    118         case UDAT_STANDALONE_DAY_FIELD:
    119         case UDAT_STANDALONE_MONTH_FIELD:
    120             return gStaticSets->fDateIgnorables;
    121 
    122         case UDAT_HOUR_OF_DAY1_FIELD:
    123         case UDAT_HOUR_OF_DAY0_FIELD:
    124         case UDAT_MINUTE_FIELD:
    125         case UDAT_SECOND_FIELD:
    126         case UDAT_HOUR1_FIELD:
    127         case UDAT_HOUR0_FIELD:
    128             return gStaticSets->fTimeIgnorables;
    129 
    130         default:
    131             return gStaticSets->fOtherIgnorables;
    132     }
    133 }
    134 
    135 U_NAMESPACE_END
    136 
    137 #endif // #if !UCONFIG_NO_FORMATTING
    138