icuSources/i18n/smpdtfst.cpp

   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