icuSources/i18n/smpdtfst.cpp

   1 /*
   2 *******************************************************************************
   3 * Copyright (C) 2009-2011, 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 "ucln_in.h"
  22 #include "umutex.h"
  23
  24
  25 #include "smpdtfst.h"
  26
  27 U_NAMESPACE_BEGIN
  28
  29 SimpleDateFormatStaticSets *SimpleDateFormatStaticSets::gStaticSets = NULL;
  30
  31 SimpleDateFormatStaticSets::SimpleDateFormatStaticSets(UErrorCode *status)
  32 : fDateIgnorables(NULL),
  33   fTimeIgnorables(NULL),
  34   fOtherIgnorables(NULL)
  35 {
  36     fDateIgnorables  = new UnicodeSet(UNICODE_STRING("[-,./[:whitespace:]]", 20), *status);
  37     fTimeIgnorables  = new UnicodeSet(UNICODE_STRING("[-.:[:whitespace:]]", 19),  *status);
  38     fOtherIgnorables = new UnicodeSet(UNICODE_STRING("[:whitespace:]", 14),       *status);
  39
  40     // Check for null pointers
  41     if (fDateIgnorables == NULL || fTimeIgnorables == NULL || fOtherIgnorables == NULL) {
  42         goto ExitConstrDeleteAll;
  43     }
  44
  45     // Freeze all the sets
  46     fDateIgnorables->freeze();
  47     fTimeIgnorables->freeze();
  48     fOtherIgnorables->freeze();
  49
  50     return; // If we reached this point, everything is fine so just exit
  51
  52 ExitConstrDeleteAll: // Remove all sets and return error
  53     delete fDateIgnorables;  fDateIgnorables = NULL;
  54     delete fTimeIgnorables;  fTimeIgnorables = NULL;
  55     delete fOtherIgnorables; fOtherIgnorables = NULL;
  56
  57     *status = U_MEMORY_ALLOCATION_ERROR;
  58 }
  59
  60
  61 SimpleDateFormatStaticSets::~SimpleDateFormatStaticSets() {
  62     delete fDateIgnorables;  fDateIgnorables = NULL;
  63     delete fTimeIgnorables;  fTimeIgnorables = NULL;
  64     delete fOtherIgnorables; fOtherIgnorables = NULL;
  65 }
  66
  67
  68 //------------------------------------------------------------------------------
  69 //
  70 //   smpdtfmt_cleanup     Memory cleanup function, free/delete all
  71 //                      cached memory.  Called by ICU's u_cleanup() function.
  72 //
  73 //------------------------------------------------------------------------------
  74 UBool
  75 SimpleDateFormatStaticSets::cleanup(void)
  76 {
  77     delete SimpleDateFormatStaticSets::gStaticSets;
  78     SimpleDateFormatStaticSets::gStaticSets = NULL;
  79
  80     return TRUE;
  81 }
  82
  83 U_CDECL_BEGIN
  84 static UBool U_CALLCONV
  85 smpdtfmt_cleanup(void)
  86 {
  87     return SimpleDateFormatStaticSets::cleanup();
  88 }
  89 U_CDECL_END
  90
  91 void SimpleDateFormatStaticSets::initSets(UErrorCode *status)
  92 {
  93         SimpleDateFormatStaticSets *p;
  94
  95     UMTX_CHECK(NULL, gStaticSets, p);
  96     if (p == NULL) {
  97         p = new SimpleDateFormatStaticSets(status);
  98
  99         if (p == NULL) {
 100                 *status = U_MEMORY_ALLOCATION_ERROR;
 101                 return;
 102         }
 103
 104         if (U_FAILURE(*status)) {
 105             delete p;
 106             return;
 107         }
 108
 109         umtx_lock(NULL);
 110         if (gStaticSets == NULL) {
 111             gStaticSets = p;
 112             p = NULL;
 113         }
 114
 115         umtx_unlock(NULL);
 116         if (p != NULL) {
 117             delete p;
 118         }
 119
 120         ucln_i18n_registerCleanup(UCLN_I18N_SMPDTFMT, smpdtfmt_cleanup);
 121     }
 122 }
 123
 124 UnicodeSet *SimpleDateFormatStaticSets::getIgnorables(UDateFormatField fieldIndex)
 125 {
 126         UErrorCode status = U_ZERO_ERROR;
 127
 128         initSets(&status);
 129
 130         if (U_FAILURE(status)) {
 131                 return NULL;
 132         }
 133
 134     switch (fieldIndex) {
 135         case UDAT_YEAR_FIELD:
 136         case UDAT_MONTH_FIELD:
 137         case UDAT_DATE_FIELD:
 138         case UDAT_STANDALONE_DAY_FIELD:
 139         case UDAT_STANDALONE_MONTH_FIELD:
 140             return gStaticSets->fDateIgnorables;
 141
 142         case UDAT_HOUR_OF_DAY1_FIELD:
 143         case UDAT_HOUR_OF_DAY0_FIELD:
 144         case UDAT_MINUTE_FIELD:
 145         case UDAT_SECOND_FIELD:
 146         case UDAT_HOUR1_FIELD:
 147         case UDAT_HOUR0_FIELD:
 148             return gStaticSets->fTimeIgnorables;
 149
 150         default:
 151             return gStaticSets->fOtherIgnorables;
 152     }
 153 }
 154
 155
 156 U_NAMESPACE_END
 157
 158 #endif // #if !UCONFIG_NO_FORMATTING