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{ Source provided for Free Pascal Bug Report 2109 }
{ Submitted by "Layton Davis" on 2002-09-05 }
{ e-mail: layton@brandom.com }
unit tw2109;
{$mode fpc}
interface
{ warning!!! -- pascal re-generates every result in an operator statement }
{ attributes of the results have to be carried forward from the old value }
{ as a work arround we have to ask the user to assign the original destination variable to OldBCD }
{ or OldZoned before doing any assignments or arithmetic }
{ fixme!!! -- assignment statements are used automatically to provide data }
{ type conversion. I need to provide a safety net so that this doesn't create bad behavior }
{ from this library }
type
flint = record
data : longint;
dec : byte;
end;
bcddata = array[1..18] of char;
bcd = record
data : ^bcddata;
bcdlen : byte;
bcddec : byte;
end;
zoneddata = array[1..9] of char;
zoned = record
data : ^zoneddata;
zonelen : byte;
zonedec : byte;
end;
operator := (a:bcd) b:Integer;
operator := (a:bcd) b:Longint;
operator := (a:bcd) b:FLInt;
function initbcd(blen, bdec:byte; bcdptr:pointer):bcd;
operator := (a:integer) b:bcd;
operator := (a:longint) b:bcd;
operator := (a:FLInt) b:bcd;
function initzoned(zlen, zdec:byte; zptr:pointer):zoned;
var
OldBCD : bcd;
implementation
operator := (a:bcd) b:Integer;
var
knt : integer;
begin
b := 0;
for knt := 1 to a.bcdlen - a.bcddec do
begin
b := b * 10;
b := b + ord(a.data^[knt]) - ord('0');
end;
end;
operator := (a:bcd) b: LongInt;
var
test : FLInt;
knt : byte;
begin
test := a;
b := test.data;
knt := test.dec;
while knt > 0 do
begin
b := b div 10;
knt := knt - 1;
end;
end;
operator := (a:bcd) b:FLInt;
var
knt : byte;
begin
b.data := 0;
for knt := 1 to a.bcdlen do
b.data := (b.data * 10) + ord(a.data^[knt]) - ord('0');
b.dec := a.bcddec;
end;
operator := (a:FLInt) b:bcd;
var
tmp : FLInt;
knt : byte;
tmpl : longint;
begin
b := oldbcd;
tmp := a;
while tmp.dec < b.bcddec do
begin
tmp.data := tmp.data * 10;
tmp.dec := tmp.dec + 1;
end;
while tmp.dec > b.bcddec do
begin
tmp.data := tmp.data div 10;
tmp.dec := tmp.dec - 1;
end;
for knt := 1 to b.bcdlen do
b.data^[knt] := '0';
knt := b.bcdlen;
while (knt > 0) and (tmp.data > 0) do
begin
tmpl := tmp.data div 10;
tmpl := tmp.data - (tmpl * 10);
b.data^[knt] := char(ord('0') + tmpl);
tmp.data := tmp.data div 10;
knt := knt - 1;
end;
end;
function initbcd(blen, bdec:byte; bcdptr:pointer):bcd;
var
temp : bcd;
knt : integer;
begin
if bcdptr <> NIL then
temp.data := bcdptr
else
new(temp.data);
temp.bcdlen := blen;
temp.bcddec := bdec;
for knt := 1 to blen do {only fill out the space allocated to us -- as we may be part of a data structure}
temp.data^[knt] := '0';
initbcd := temp;
end;
operator := (a:integer) b:bcd;
var
knt : integer;
temp : integer;
temp2 : integer;
begin
b := oldbcd;
for knt := 1 to b.bcdlen do
b.data^[knt] := '0';
knt := b.bcdlen-b.bcddec;
temp := a;
while (knt > 0 ) and (temp > 0) do
begin
temp2 := temp div 10;
temp2 := temp - (temp2 * 10);
temp := temp div 10;
b.data^[knt] := char(ord('0') + temp2);
knt := knt - 1;
end;
end;
operator := (a:longint) b:bcd;
var
knt : integer;
temp : longint;
temp2 : longint;
begin
b := oldbcd;
for knt := 1 to b.bcdlen do
b.data^[knt] := '0';
knt := b.bcdlen-b.bcddec;
temp := a;
while (knt > 0 ) and (temp > 0) do
begin
temp2 := temp div 10;
temp2 := temp - (temp2 * 10);
temp := temp div 10;
b.data^[knt] := char(ord('0') + temp2);
knt := knt - 1;
end;
end;
function initzoned(zlen, zdec:byte; zptr:pointer):zoned;
begin
end;
end.
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