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Fix subract of short value form long one.

This commit is contained in:
steve 2000-06-12 03:56:51 +00:00
parent 6329549938
commit 8b03550a1e
1 changed files with 19 additions and 10 deletions
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29
verinum.cc
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@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: verinum.cc,v 1.16 2000/02/23 04:43:43 steve Exp $"
#ident "$Id: verinum.cc,v 1.17 2000/06/12 03:56:51 steve Exp $"
#endif
# include "verinum.h"
@ -445,9 +445,18 @@ verinum operator + (const verinum&left, const verinum&right)
verinum operator - (const verinum&left, const verinum&r)
{
verinum right = v_not(r);
verinum right;
unsigned min = left.len();
if (right.len() < min) min = right.len();
if (r.len() < min) {
right = verinum(verinum::V0, min);
for (unsigned idx = 0 ; idx < r.len() ; idx += 1)
right.set(idx, r[idx]);
} else {
right = r;
}
right = v_not(right);
unsigned max = left.len();
if (right.len() > max) max = right.len();
@ -458,19 +467,19 @@ verinum operator - (const verinum&left, const verinum&r)
for (unsigned idx = 0 ; idx < min ; idx += 1)
val.set(idx, add_with_carry(left[idx], right[idx], carry));
if (left.len() > right.len()) {
for (unsigned idx = min ; idx < max ; idx += 1)
val.set(idx,add_with_carry(left[idx], verinum::V0, carry));
} else {
for (unsigned idx = min ; idx < max ; idx += 1)
val.set(idx, add_with_carry(verinum::V0, right[idx], carry));
}
assert(left.len() <= right.len());
for (unsigned idx = min ; idx < max ; idx += 1)
val.set(idx, add_with_carry(verinum::V0, right[idx], carry));
return val;
}
/*
* $Log: verinum.cc,v $
* Revision 1.17 2000/06/12 03:56:51 steve
* Fix subract of short value form long one.
*
* Revision 1.16 2000/02/23 04:43:43 steve
* Some compilers do not accept the not symbol.
*