icuSources/i18n/smpdtfst.cpp

   1 //
   2 //  smpdtfst.h
   3 //
   4 //  Copyright (C) 2009, International Business Machines Corporation and others.
   5 //  All Rights Reserved.
   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 #include "unicode/utypes.h"
  14
  15 #if !UCONFIG_NO_FORMATTING
  16
  17 #include "unicode/uniset.h"
  18 #include "unicode/udat.h"
  19 #include "cmemory.h"
  20 #include "ucln_in.h"
  21 #include "umutex.h"
  22
  23
  24 #include "smpdtfst.h"
  25
  26 U_NAMESPACE_BEGIN
  27
  28 SimpleDateFormatStaticSets *SimpleDateFormatStaticSets::gStaticSets = NULL;
  29
  30 SimpleDateFormatStaticSets::SimpleDateFormatStaticSets(UErrorCode *status)
  31 : fDateIgnorables(NULL),
  32   fTimeIgnorables(NULL),
  33   fOtherIgnorables(NULL)
  34 {
  35     fDateIgnorables  = new UnicodeSet("[-,./[:whitespace:]]", *status);
  36     fTimeIgnorables  = new UnicodeSet("[-.:[:whitespace:]]",  *status);
  37     fOtherIgnorables = new UnicodeSet("[:whitespace:]",       *status);
  38
  39     // Check for null pointers
  40     if (fDateIgnorables == NULL || fTimeIgnorables == NULL || fOtherIgnorables == NULL) {
  41         goto ExitConstrDeleteAll;
  42     }
  43
  44     // Freeze all the sets
  45     fDateIgnorables->freeze();
  46     fTimeIgnorables->freeze();
  47     fOtherIgnorables->freeze();
  48
  49     return; // If we reached this point, everything is fine so just exit
  50
  51 ExitConstrDeleteAll: // Remove all sets and return error
  52     delete fDateIgnorables;  fDateIgnorables = NULL;
  53     delete fTimeIgnorables;  fTimeIgnorables = NULL;
  54     delete fOtherIgnorables; fOtherIgnorables = NULL;
  55
  56     *status = U_MEMORY_ALLOCATION_ERROR;
  57 }
  58
  59
  60 SimpleDateFormatStaticSets::~SimpleDateFormatStaticSets() {
  61     delete fDateIgnorables;  fDateIgnorables = NULL;
  62     delete fTimeIgnorables;  fTimeIgnorables = NULL;
  63     delete fOtherIgnorables; fOtherIgnorables = NULL;
  64 }
  65
  66
  67 //------------------------------------------------------------------------------
  68 //
  69 //   smpdtfmt_cleanup     Memory cleanup function, free/delete all
  70 //                      cached memory.  Called by ICU's u_cleanup() function.
  71 //
  72 //------------------------------------------------------------------------------
  73 UBool
  74 SimpleDateFormatStaticSets::cleanup(void)
  75 {
  76     delete SimpleDateFormatStaticSets::gStaticSets;
  77     SimpleDateFormatStaticSets::gStaticSets = NULL;
  78
  79     return TRUE;
  80 }
  81
  82 U_CDECL_BEGIN
  83 static UBool U_CALLCONV
  84 smpdtfmt_cleanup(void)
  85 {
  86     return SimpleDateFormatStaticSets::cleanup();
  87 }
  88 U_CDECL_END
  89
  90 void SimpleDateFormatStaticSets::initSets(UErrorCode *status)
  91 {
  92         SimpleDateFormatStaticSets *p;
  93
  94     UMTX_CHECK(NULL, gStaticSets, p);
  95     if (p == NULL) {
  96         p = new SimpleDateFormatStaticSets(status);
  97
  98         if (p == NULL) {
  99                 *status = U_MEMORY_ALLOCATION_ERROR;
 100                 return;
 101         }
 102
 103         if (U_FAILURE(*status)) {
 104             delete p;
 105             return;
 106         }
 107
 108         umtx_lock(NULL);
 109         if (gStaticSets == NULL) {
 110             gStaticSets = p;
 111             p = NULL;
 112         }
 113
 114         umtx_unlock(NULL);
 115         if (p != NULL) {
 116             delete p;
 117         }
 118
 119         ucln_i18n_registerCleanup(UCLN_I18N_SMPDTFMT, smpdtfmt_cleanup);
 120     }
 121 }
 122
 123 UnicodeSet *SimpleDateFormatStaticSets::getIgnorables(UDateFormatField fieldIndex)
 124 {
 125         UErrorCode status = U_ZERO_ERROR;
 126
 127         initSets(&status);
 128
 129         if (U_FAILURE(status)) {
 130                 return NULL;
 131         }
 132
 133     switch (fieldIndex) {
 134         case UDAT_YEAR_FIELD:
 135         case UDAT_MONTH_FIELD:
 136         case UDAT_DATE_FIELD:
 137         case UDAT_STANDALONE_DAY_FIELD:
 138         case UDAT_STANDALONE_MONTH_FIELD:
 139             return gStaticSets->fDateIgnorables;
 140
 141         case UDAT_HOUR_OF_DAY1_FIELD:
 142         case UDAT_HOUR_OF_DAY0_FIELD:
 143         case UDAT_MINUTE_FIELD:
 144         case UDAT_SECOND_FIELD:
 145         case UDAT_HOUR1_FIELD:
 146         case UDAT_HOUR0_FIELD:
 147             return gStaticSets->fTimeIgnorables;
 148
 149         default:
 150             return gStaticSets->fOtherIgnorables;
 151     }
 152 }
 153
 154
 155 U_NAMESPACE_END
 156
 157 #endif // #if !UCONFIG_NO_FORMATTING