usr/src/usr.bin/pascal/libpc/unixio.i

(* Copyright (c) 1979 Regents of the University of California *)

const
sccsid = '@(#)unixio.i 1.1 %G%';

type
fileptr = record
        cnt :integer
        end;

function TELL(
var     fptr :text)
{returns} :fileptr;

var
filesize, headsize, tailsize :integer;
result :fileptr;

begin
tailsize := 0;
while not eof(fptr) do begin
        get(fptr);
        tailsize := tailsize + 1
        end;
filesize := 0;
reset(fptr);
while not eof(fptr) do begin
        get(fptr);
        filesize := filesize + 1
        end;
reset(fptr);
for headsize := 1 to filesize - tailsize do
        get(fptr);
result.cnt := headsize;
TELL := result
end;

procedure SEEK(
 var    fptr :text;
 var    cnt :fileptr);

var
i :integer;

begin
reset(fptr);
for i := 1 to cnt.cnt do
        get(fptr)
end;

procedure APPEND(
 var    fptr :text);

var
tmp :text;

begin
rewrite(tmp);
reset(fptr);
while not eof(fptr) do begin
        if eoln(fptr) then
                writeln(tmp)
        else
                write(tmp, fptr^);
        get(fptr)
        end;
reset(tmp);
rewrite(fptr);
while not eof(tmp) do begin
        if eoln(tmp) then
                writeln(fptr)
        else
                write(fptr, tmp^);
        get(tmp)
        end
end;