- 1 year ago
Making STDIN unbuffered under Windows in Perl
To make STDIN unbuffered in Perl on Windows, you can use the Win32::Console
module. Here's an example code snippet that demonstrates how to achieve this:
perluse strict;
use warnings;
use Win32::Console;
# Create a Win32::Console object
my $console = Win32::Console->new(STD_INPUT_HANDLE);
# Set the mode to enable unbuffered input
$console->Mode(ENABLE_MOUSE_INPUT | ENABLE_EXTENDED_FLAGS)
or die "Failed to set console mode: $^E";
# Read input character by character
while (1) {
my $char;
$console->Read($char, 1);
last if $char eq 'q'; # Exit loop if 'q' is entered
print "Received input: $char\n";
}
# Restore the original console mode
$console->Mode(ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT)
or die "Failed to restore console mode: $^E";
In this example, we first create a Win32::Console
object by calling the new
method with STD_INPUT_HANDLE
as the argument. We then set the console mode using the Mode
method, specifying the flags for unbuffered input (ENABLE_MOUSE_INPUT
and ENABLE_EXTENDED_FLAGS
).
Inside the loop, we use the Read
method to read input character by character from STDIN. The loop continues until the user enters 'q', at which point the loop is exited.
After the loop, we restore the original console mode using the Mode
method with the flags for line input and echo input (ENABLE_LINE_INPUT
and ENABLE_ECHO_INPUT
).
Note that the Win32::Console
module is specific to Windows and may not be available on other platforms. Make sure you have it installed before running the code.
By using the Win32::Console
module and setting the appropriate console mode, you can achieve unbuffered input from STDIN in Perl on Windows.