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/* flonum_copy.c - copy a flonum
Copyright (C) 1987, 1990, 1991, 1992 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef lint
static char rcsid[] = "$Id: flo-copy.c,v 1.1 1995/10/18 08:38:58 deraadt Exp $";
#endif
#include "as.h"
void
flonum_copy(in, out)
FLONUM_TYPE *in;
FLONUM_TYPE *out;
{
int in_length; /* 0 origin */
int out_length; /* 0 origin */
out->sign = in->sign;
in_length = in->leader - in->low;
if (in_length < 0) {
out->leader = out->low - 1; /* 0.0 case */
} else {
out_length = out->high - out->low;
/*
* Assume no GAPS in packing of littlenums.
* I.e. sizeof(array) == sizeof(element) * number_of_elements.
*/
if (in_length <= out_length) {
{
/*
* For defensive programming, zero any high-order littlenums we don't need.
* This is destroying evidence and wasting time, so why bother???
*/
if (in_length < out_length) {
memset((char *)(out->low + in_length + 1), '\0', out_length - in_length);
}
}
memcpy((void *)(out->low), (void *)(in->low), (int)((in_length + 1) * sizeof(LITTLENUM_TYPE)));
out->exponent = in->exponent;
out->leader = in->leader - in->low + out->low;
} else {
int shorten; /* 1-origin. Number of littlenums we drop. */
shorten = in_length - out_length;
/* Assume out_length >= 0 ! */
memcpy((void *)( out->low), (void *)(in->low + shorten), (int)((out_length + 1) * sizeof(LITTLENUM_TYPE)));
out->leader = out->high;
out->exponent = in->exponent + shorten;
}
} /* if any significant bits */
} /* flonum_copy() */
/* end of flonum_copy.c */
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