forked from KolibriOS/kolibrios
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/****************************************************************************
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*
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* Open Watcom Project
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*
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* ========================================================================
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*
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* This file contains Original Code and/or Modifications of Original
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* Code as defined in and that are subject to the Sybase Open Watcom
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* Public License version 1.0 (the 'License'). You may not use this file
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* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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* provided with the Original Code and Modifications, and is also
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* available at www.sybase.com/developer/opensource.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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* NON-INFRINGEMENT. Please see the License for the specific language
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* governing rights and limitations under the License.
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*
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* ========================================================================
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*
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* Description: Implementation of rand() and srand().
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*
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****************************************************************************/
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#include "variety.h"
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#include <stdlib.h>
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#include "randnext.h"
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#include "rtdata.h"
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static unsigned long *initrandnext( void )
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{
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_INITRANDNEXT( RETURN_ARG( unsigned long *, NULL ) );
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return( (unsigned long *)&_RWD_randnext );
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}
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_WCRTLINK int rand( void )
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/************************/
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{
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unsigned long *randptr;
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randptr = initrandnext();
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if( randptr == NULL ) {
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return( 0 );
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}
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*randptr = *randptr * 1103515245 + 12345;
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return( (int)( (*randptr >> 16) & 0x7FFF ) );
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}
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_WCRTLINK void srand( unsigned int seed )
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/***************************************/
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{
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unsigned long *randptr;
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randptr = initrandnext();
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if( randptr != NULL ) {
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*randptr = seed;
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}
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}
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