Home | History | Annotate | Download | only in i18n 
      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
    159