OpenEuphoria

Re: Standard Input Max Length Limitation

• Posted by Robert Craig <rds at RapidEuphoria.com> Jun 28, 2007
• 770 views

Fernando Bauer wrote:
> If you run for DOS (ex.exe) it results 128 in my system (WinXP).
> If I am right, the result obtained (79) in case of Windows is related to the
> position, not to the quantity of characters.
> Try this:
> position(1,70)
> ? length( gets(0) & 0 ) - 1
> 
> In file be_runtime.c we can read in the function key_gets() (from line 4529
> of version 3.0.2):
> 	    if (column < 79) {
> 		len = strlen(input_string);
> 		one_char[0] = c;
> 		...
> This function is called by wingetch() which is called by EGets().
> If the exw.exe is compiled with BORLAND or LCC, probably the result will be
> different, because key_gets() isn't called.
> Maybe Rob could better explain that limit for Windows?

Thanks for pointing out that code.
I thought I was using key_gets() just for input during
the interactive trace, but see now I'm also using it more generally
when WATCOM for Windows is the C compiler used, i.e. in exw.exe
and exwc.exe. key_gets() also handles backspaces, left-arrow etc.

If anyone wants to experiment with increasing the 79 limit,
feel free. I'm not sure it will work though in an 
80-character wide Windows console.

Regards,
   Rob Craig
   Rapid Deployment Software
   http://www.RapidEuphoria.com