// © 2016 and later: Unicode, Inc. and others.

// License & terms of use: http://www.unicode.org/copyright.html

/*

*******************************************************************************

* Copyright (C) 2009-2013, International Business Machines Corporation and    *

* others. All Rights Reserved.                                                *

*******************************************************************************

*

* This file contains the class SimpleDateFormatStaticSets

*

* SimpleDateFormatStaticSets holds the UnicodeSets that are needed for lenient

* parsing of literal characters in date/time strings.

********************************************************************************

*/

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

#include "unicode/uniset.h"

#include "unicode/udat.h"

#include "cmemory.h"

#include "uassert.h"

#include "ucln_in.h"

#include "umutex.h"

#include "smpdtfst.h"

U_NAMESPACE_BEGIN

SimpleDateFormatStaticSets *gStaticSets = NULL;

UInitOnce gSimpleDateFormatStaticSetsInitOnce = U_INITONCE_INITIALIZER;

SimpleDateFormatStaticSets::SimpleDateFormatStaticSets(UErrorCode &status)

: fDateIgnorables(NULL),

  fTimeIgnorables(NULL),

  fOtherIgnorables(NULL)

{

    fDateIgnorables  = new UnicodeSet(UNICODE_STRING("[-,./[:whitespace:]]", 20), status);

    fTimeIgnorables  = new UnicodeSet(UNICODE_STRING("[-.:[:whitespace:]]", 19),  status);

    fOtherIgnorables = new UnicodeSet(UNICODE_STRING("[:whitespace:]", 14),       status);

    // Check for null pointers

    if (fDateIgnorables == NULL || fTimeIgnorables == NULL || fOtherIgnorables == NULL) {

        goto ExitConstrDeleteAll;

    }

    // Freeze all the sets

    fDateIgnorables->freeze();

    fTimeIgnorables->freeze();

    fOtherIgnorables->freeze();

    return; // If we reached this point, everything is fine so just exit

ExitConstrDeleteAll: // Remove all sets and return error

    delete fDateIgnorables;  fDateIgnorables = NULL;

    delete fTimeIgnorables;  fTimeIgnorables = NULL;

    delete fOtherIgnorables; fOtherIgnorables = NULL;

    status = U_MEMORY_ALLOCATION_ERROR;

}

SimpleDateFormatStaticSets::~SimpleDateFormatStaticSets() {

    delete fDateIgnorables;  fDateIgnorables = NULL;

    delete fTimeIgnorables;  fTimeIgnorables = NULL;

    delete fOtherIgnorables; fOtherIgnorables = NULL;

}

//------------------------------------------------------------------------------

//

//   smpdtfmt_cleanup     Memory cleanup function, free/delete all

//                      cached memory.  Called by ICU's u_cleanup() function.

//

//------------------------------------------------------------------------------

UBool

SimpleDateFormatStaticSets::cleanup(void)

{

    delete gStaticSets;

    gStaticSets = NULL;

    gSimpleDateFormatStaticSetsInitOnce.reset();

    return TRUE;

}

U_CDECL_BEGIN

static UBool U_CALLCONV

smpdtfmt_cleanup(void)

{

    return SimpleDateFormatStaticSets::cleanup();

}

static void U_CALLCONV smpdtfmt_initSets(UErrorCode &status) {

    ucln_i18n_registerCleanup(UCLN_I18N_SMPDTFMT, smpdtfmt_cleanup);

    U_ASSERT(gStaticSets == NULL);

    gStaticSets = new SimpleDateFormatStaticSets(status);

    if (gStaticSets == NULL) {

        status = U_MEMORY_ALLOCATION_ERROR;

        return;

    }

}

U_CDECL_END

UnicodeSet *SimpleDateFormatStaticSets::getIgnorables(UDateFormatField fieldIndex)

{

    UErrorCode status = U_ZERO_ERROR;

    umtx_initOnce(gSimpleDateFormatStaticSetsInitOnce, &smpdtfmt_initSets, status);

    if (U_FAILURE(status)) {

        return NULL;

    }

    switch (fieldIndex) {

        case UDAT_YEAR_FIELD:

        case UDAT_MONTH_FIELD:

        case UDAT_DATE_FIELD:

        case UDAT_STANDALONE_DAY_FIELD:

        case UDAT_STANDALONE_MONTH_FIELD:

            return gStaticSets->fDateIgnorables;

        case UDAT_HOUR_OF_DAY1_FIELD:

        case UDAT_HOUR_OF_DAY0_FIELD:

        case UDAT_MINUTE_FIELD:

        case UDAT_SECOND_FIELD:

        case UDAT_HOUR1_FIELD:

        case UDAT_HOUR0_FIELD:

            return gStaticSets->fTimeIgnorables;

        default:

            return gStaticSets->fOtherIgnorables;

    }

}

U_NAMESPACE_END

#endif // #if !UCONFIG_NO_FORMATTING