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-rw-r--r--gas/bignum-copy.c80
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diff --git a/gas/bignum-copy.c b/gas/bignum-copy.c
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-/* bignum_copy.c - copy a bignum
- 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#include "as.h"
-
-/*
- * bignum_copy ()
- *
- * Copy a bignum from in to out.
- * If the output is shorter than the input, copy lower-order littlenums.
- * Return 0 or the number of significant littlenums dropped.
- * Assumes littlenum arrays are densely packed: no unused chars between
- * the littlenums. Uses memcpy() to move littlenums, and wants to
- * know length (in chars) of the input bignum.
- */
-
-/* void */
-int
-bignum_copy (in, in_length, out, out_length)
- register LITTLENUM_TYPE *in;
- register int in_length; /* in sizeof(littlenum)s */
- register LITTLENUM_TYPE *out;
- register int out_length; /* in sizeof(littlenum)s */
-{
- int significant_littlenums_dropped;
-
- if (out_length < in_length)
- {
- LITTLENUM_TYPE *p; /* -> most significant (non-zero) input
- littlenum. */
-
- memcpy ((void *) out, (void *) in,
- (unsigned int) out_length << LITTLENUM_SHIFT);
- for (p = in + in_length - 1; p >= in; --p)
- {
- if (*p)
- break;
- }
- significant_littlenums_dropped = p - in - in_length + 1;
-
- if (significant_littlenums_dropped < 0)
- {
- significant_littlenums_dropped = 0;
- }
- }
- else
- {
- memcpy ((char *) out, (char *) in,
- (unsigned int) in_length << LITTLENUM_SHIFT);
-
- if (out_length > in_length)
- {
- memset ((char *) (out + in_length),
- '\0',
- (unsigned int) (out_length - in_length) << LITTLENUM_SHIFT);
- }
-
- significant_littlenums_dropped = 0;
- }
-
- return (significant_littlenums_dropped);
-} /* bignum_copy() */
-
-/* end of bignum-copy.c */