icuSources/i18n/smpdtfst.cpp

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