Terminal control/Dimensions

Terminal control/Dimensions is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Determine the height and width of the terminal, and store this information into variables for subsequent use.

Forth

Works with: GNU Forth

<lang forth>variable term-width variable term-height

form ( width height ) term-height ! term-width !</lang>

PureBasic

PureBasic does not have native functions for reading the size of this window, but supports API-functions that allows this.

This code is for Windows only. <lang PureBasic>Macro ConsoleHandle()

 GetStdHandle_( #STD_OUTPUT_HANDLE )

EndMacro

Procedure ConsoleWidth()

 Protected CBI.CONSOLE_SCREEN_BUFFER_INFO
 Protected hConsole = ConsoleHandle()
 GetConsoleScreenBufferInfo_( hConsole, @CBI )
 ProcedureReturn CBI\srWindow\right - CBI\srWindow\left + 1

EndProcedure

Procedure ConsoleHeight()

 Protected CBI.CONSOLE_SCREEN_BUFFER_INFO
 Protected hConsole = ConsoleHandle()
 GetConsoleScreenBufferInfo_( hConsole, @CBI )
 ProcedureReturn CBI\srWindow\bottom - CBI\srWindow\top + 1

EndProcedure

If OpenConsole()

 x$=Str(ConsoleWidth())
 y$=Str(ConsoleHeight())
 PrintN("This window is "+x$+"x"+y$+ " chars.")
 ;
 Print(#CRLF$+"Press ENTER to exit"):Input()

EndIf</lang>

Retro

This information is provided by Retro in the fh (height) and fw (width) variables. You can manually obtain it using the io ports.

<lang Retro>-3 5 out wait 5 in !fw -4 5 out wait 5 in !fh</lang>

REXX

Works with: brexx

Works with: regina

Works with: rexximc

Rexx does not provide basic terminal control as part of the language. However, it is possible to determine the size of the terminal window by using external system commands:

<lang rexx> width = 'tput'( 'cols' ) height = 'tput'( 'lines' )

say 'The terminal is' width 'characters wide' say 'and has' height 'lines' </lang>

UNIX Shell

Works with: Bourne Shell

Works with: bash

<lang sh>#!/bin/sh WIDTH=`tput cols` HEIGHT=`tput lines` echo "The terminal is $WIDTH characters wide and has $HEIGHT lines"</lang>