Contributor: PETER BEEFTINK
{> Yeah ! Please post your UU(EN/DE)CODE here ! I am interested, as well !
and the decode as well.
}
program uudecode;
CONST defaultSuffix = '.uue';
offset = 32;
TYPE string80 = string[80];
VAR infile: text;
fi : file of byte;
outfile: file of byte;
lineNum: integer;
line: string80;
size,remaining :real;
procedure Abort(message: string80);
begin {abort}
writeln;
if lineNum> 0 then write('Line ', lineNum, ': ');
writeln(message);
halt
end; {Abort}
procedure NextLine(var s: string80);
begin {NextLine}
LineNum := succ(LineNum);
{write('.');}
readln(infile, s);
remaining:=remaining-length(s)-2; {-2 is for CR/LF}
write('bytes remaining: ',remaining:7:0,' (',
remaining/size*100.0:3:0,'%)',chr(13));
end; {NextLine}
procedure Init;
procedure GetInFile;
VAR infilename: string80;
begin {GetInFile}
if ParamCount = 0 then abort ('Usage: uudecode ');
infilename := ParamStr(1);
if pos('.', infilename) = 0
then infilename := concat(infilename, defaultSuffix);
assign(infile, infilename);
{$i-}
reset(infile);
{$i+}
if IOresult> 0 then abort (concat('Can''t open ', infilename));
writeln ('Decoding ', infilename);
assign(fi,infilename); reset(fi);
size:=FileSize(fi); close(fi);
if size < 0 then size:=size+65536.0; remaining:=size; end; {GetInFile} procedure GetOutFile; var header, mode, outfilename: string80; ch: char; procedure ParseHeader; VAR index: integer; Procedure NextWord(var word:string80; var index: integer); begin {nextword} word := ''; while header[index] = ' ' do begin index := succ(index); if index> length(header) then abort ('Incomplete header')
end;
while header[index] ' ' do
begin
word := concat(word, header[index]);
index := succ(index)
end
end; {NextWord}
begin {ParseHeader}
header := concat(header, ' ');
index := 7;
NextWord(mode, index);
NextWord(outfilename, index)
end; {ParseHeader}
begin {GetOutFile}
if eof(infile) then abort('Nothing to decode.');
NextLine (header);
while not ((copy(header, 1, 6) = 'begin ') or eof(infile)) do
NextLine(header);
writeln;
if eof(infile) then abort('Nothing to decode.');
ParseHeader;
assign(outfile, outfilename);
writeln ('Destination is ', outfilename);
{$i-}
reset(outfile);
{$i+}
if IOresult = 0 then
begin
{ write ('Overwrite current ', outfilename, '? [Y/N] ');
repeat
read (kbd, ch);
ch := UpCase(ch)
until ch in ['Y', 'N'];
writeln(ch);
if ch = 'N' then abort ('Overwrite cancelled.')}
end;
rewrite (outfile);
end; {GetOutFile}
begin {init}
lineNum := 0;
GetInFile;
GetOutFile;
end; { init}
Function CheckLine: boolean;
begin {CheckLine}
if line = '' then abort ('Blank line in file');
CheckLine := not (line[1] in [' ', '`'])
end; {CheckLine}
procedure DecodeLine;
VAR lineIndex, byteNum, count, i: integer;
chars: array [0..3] of byte;
hunk: array [0..2] of byte;
{ procedure debug;
var i: integer;
procedure writebin(x: byte);
var i: integer;
begin
for i := 1 to 8 do
begin
write ((x and 80ドル) shr 7);
x := x shl 1
end;
write (' ')
end;
begin
writeln;
for i := 0 to 3 do writebin(chars[i]);
writeln;
for i := 0 to 2 do writebin(hunk[i]);
writeln
end; }
function nextch: char;
begin {nextch}
lineIndex := succ(lineIndex);
if lineIndex> length(line) then abort('Line too short.');
if not (line[lineindex] in [' '..'`'])
then abort('Illegal character in line.');
{ write(line[lineindex]:2);}
if line[lineindex] = '`' then nextch := ' '
else nextch := line[lineIndex]
end; {nextch}
procedure DecodeByte;
procedure GetNextHunk;
VAR i: integer;
begin {GetNextHunk}
for i := 0 to 3 do chars[i] := ord(nextch) - offset;
hunk[0] := (chars[0] shl 2) + (chars[1] shr 4);
hunk[1] := (chars[1] shl 4) + (chars[2] shr 2);
hunk[2] := (chars[2] shl 6) + chars[3];
byteNum := 0 {;
debug }
end; {GetNextHunk}
begin {DecodeByte}
if byteNum = 3 then GetNextHunk;
write (outfile, hunk[byteNum]);
{writeln(bytenum, ' ', hunk[byteNum]);}
byteNum := succ(byteNum)
end; {DecodeByte}
begin {DecodeLine}
lineIndex := 0;
byteNum := 3;
count := (ord(nextch) - offset);
for i := 1 to count do DecodeByte
end; {DecodeLine}
procedure terminate;
var trailer: string80;
begin {terminate}
if eof(infile) then abort ('Abnormal end.');
NextLine (trailer);
if length (trailer) < 3 then abort ('Abnormal end.'); if copy (trailer, 1, 3) 'end' then abort ('Abnormal end.');
close (infile);
close (outfile)
end;
begin {uudecode}
init;
NextLine(line);
while CheckLine do
begin
DecodeLine;
NextLine(line)
end;
terminate
end.