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1 /* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/c_datd/esrg_int_def.c,v 1.2 2002/07/29 16:53:10 dtashley Exp $
2 **
3 ** A description of the functionality of this module and the public interface
4 ** definition is contained in the associated .H file.
5 */
7 //--------------------------------------------------------------------------------
8 //Copyright 2001 David T. Ashley
9 //-------------------------------------------------------------------------------------------------
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12 //-------------------------------------------------------------------------------------------------
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685 //Public License instead of this License. But first, please read
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687 //-------------------------------------------------------------------------------------------------
688 //--------------------------------------------------------------------------------
691 #include <assert.h>
692 #include <string.h>
694 #include "esrg_int_def.h"
697 void ESRG_INT_DEF_Create( ESRG_INT_DEF_INT *arg, int is_signed )
698 {
699 assert(arg != NULL);
701 memset(arg, 0, sizeof(ESRG_INT_DEF_INT));
703 if (is_signed)
704 {
705 arg->flags = ESRG_INT_DEF_FLAG_IS_SIGNED;
706 }
707 }
710 void ESRG_INT_DEF_AssignU( ESRG_INT_DEF_INT *arg, unsigned int aval)
711 {
712 assert(arg != NULL);
714 //Reset any pending error flags. An assignment starts fresh.
717 arg->limbs[0] = aval;
718 memset(&(arg->limbs[1]), 0, sizeof(arg->limbs[0]) * (ESRG_INT_DEF_NLIMBS-1));
720 //The only circumstance under which there is an overflow
721 //is if the value is inherently signed and if the limbs per
722 //int is 1 and the MSB is set.
723 if (arg->flags & ESRG_INT_DEF_FLAG_IS_SIGNED)
724 {
725 if (ESRG_INT_DEF_NLIMBS == 1)
726 {
727 if (aval & (1 << (ESRG_INT_DEF_NATIVE_BITSIZE-1)))
728 {
729 arg->flags |= ESRG_INT_DEF_FLAG_POS_ROLL;
730 }
731 }
732 }
733 }
736 void ESRG_INT_DEF_AssignS( ESRG_INT_DEF_INT *arg, int aval)
737 {
738 assert(arg != NULL);
740 //Reset any pending error flags. An assignment starts fresh.
743 arg->limbs[0] = aval;
744 //Assign the base limb.
746 //Deal with the sign extension. If the number is not signed,
747 //don't extend at all. If the number is signed, extend.
748 if (arg->flags & ESRG_INT_DEF_FLAG_IS_SIGNED)
749 {
750 if (aval < 0)
751 memset(&(arg->limbs[1]), -1, sizeof(arg->limbs[0]) * (ESRG_INT_DEF_NLIMBS-1));
752 else
753 memset(&(arg->limbs[1]), 0, sizeof(arg->limbs[0]) * (ESRG_INT_DEF_NLIMBS-1));
754 }
755 else
756 {
757 memset(&(arg->limbs[1]), 0, sizeof(arg->limbs[0]) * (ESRG_INT_DEF_NLIMBS-1));
758 }
760 //The only circumstance under which there is an overflow
761 //is if the value is inherently unsigned and if the limbs per
762 //int is 1 and the MSB is set.
763 if (!(arg->flags & ESRG_INT_DEF_FLAG_IS_SIGNED))
764 {
765 if (ESRG_INT_DEF_NLIMBS == 1)
766 {
767 if (aval & (1 << (ESRG_INT_DEF_NATIVE_BITSIZE-1)))
768 {
769 arg->flags |= ESRG_INT_DEF_FLAG_POS_ROLL;
770 }
771 }
772 }
773 }
777 {
778 assert(a != NULL);
779 assert(b != NULL);
781 return(0);
782 }
785 /******************************************************************************
786 ** $Log: esrg_int_def.c,v $
787 ** Revision 1.2 2002/07/29 16:53:10 dtashley
788 ** Safety checkins before being moved to WSU server Kalman.
789 **
790 ** Revision 1.1 2002/07/08 10:47:29 dtashley
791 ** Initial checkin.
792 *******************************************************************************
793 ** End of ESRG_INT_DEF.C. */

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