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write function and writeLn print cryptic characters into the console
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Topic: write function and writeLn print cryptic characters into the console (Read 3164 times)
dankmarius
Newbie
Posts: 2
write function and writeLn print cryptic characters into the console
«
on:
August 20, 2018, 07:50:17 pm »
So when ever I print something to the console the first line (and only the first) starts with some cryptic characters and I don't know how to fix the issue. I am on Ubuntu and installed the latest lazarus-ide version (1.8.4). The issue only surfaces when I use the CRT package, if it isn't included no problems arise. What can I do to solve this problem?
Logged
Handoko
Hero Member
Posts: 5131
My goal: build my own game engine using Lazarus
Re: write function and writeLn print cryptic characters into the console
«
Reply #1 on:
August 20, 2018, 08:18:52 pm »
Hello dankmarius,
Welcome to the forum.
The binary created using Lazarus/FPC works perfectly. Just don't run it using Lazarus Terminal Output (Ctrl+Alt+O), you should run it using the Terminal provided by your Ubuntu.
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engkin
Hero Member
Posts: 3112
Re: write function and writeLn print cryptic characters into the console
«
Reply #2 on:
August 20, 2018, 10:19:09 pm »
Just curious, what was the correct text in the first line?
Logged
Handoko
Hero Member
Posts: 5131
My goal: build my own game engine using Lazarus
Re: write function and writeLn print cryptic characters into the console
«
Reply #3 on:
August 21, 2018, 03:25:44 am »
Below is the code and the console output using Lazarus Terminal Output.
The bug already existed since first time I used Lazarus on Ubuntu. But because I think it wasn't critical and I do not write console program, I just ignore it. The result binaries will show correctly if I run them using the Terminal provided by Ubuntu.
Code: Pascal
[Select]
[+]
[-]
program
Project1
;
uses
Crt
;
begin
WriteLn
(
'Hello'
)
;
WriteLn
(
'World.'
)
;
ReadLn
;
end
.
«
Last Edit: August 21, 2018, 03:29:14 am by Handoko
»
Logged
engkin
Hero Member
Posts: 3112
Re: write function and writeLn print cryptic characters into the console
«
Reply #4 on:
August 21, 2018, 04:53:04 am »
Thank you!
Code: Pascal
[Select]
[+]
[-]
//Laz\fpc\3.0.4\source\packages\rtl-console\src\unix\crt.pp
Initialization
...
{ Get current X,Y if not set already }
GetXY
(
CurrX
,
CurrY
)
;
if
(
CurrX
=
0
)
then
begin
CurrX
:
=
1
;
CurrY
:
=
1
;
ttySendStr
(
#27
'[H'
)
;
end
;
{Reset Attribute (TextAttr=7 at startup)}
ttySendStr
(
#27
'[m'
)
;
..
Code: Pascal
[Select]
[+]
[-]
//Laz\fpc\3.0.4\source\packages\rtl-console\src\unix\crt.pp
procedure
GetXY
(
var
x
,
y
:
byte
)
;
...
s
:
=
#27
'[6n'
;
fpWrite
(
0
,
s
[
1
]
,
length
(
s
)
)
;
..
Edit:
ESC 0 J: clear from cursor to end of the screen.
ESC 1 J: clear from cursor to beginning of the screen.
ESC 2 J: clear entire screen.
Source
.
«
Last Edit: August 21, 2018, 05:11:47 am by engkin
»
Logged
dankmarius
Newbie
Posts: 2
Re: write function and writeLn print cryptic characters into the console
«
Reply #5 on:
August 21, 2018, 09:09:36 am »
Thank you very much Handoko, this fiexd my issue.
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