pads limitation of 32767 rows

[Phil Dibowitz]

ncurses folks,

I seem to have found a limitation with ncurses' pad feature - pads can't be
larger than 32767 lines. At 32768, ncurses fails to allocate the window.
It's not clear why.

Here's a small test program that illustrates the problem:

-------------------------------------------------
#include <ncurses.h>
#include <signal.h>
#include <stdlib.h>

#define SIZE 32768

void kill_handler(int sig)
{
        curs_set(1);
        nocbreak();
        endwin();
        exit(0);
}

int main(int argc, char *argv[])
{
        int x;
        int y;
        initscr();
        cbreak();
        noecho();
        halfdelay(1);
        getmaxyx(stdscr,y,x);
        WINDOW* pad = newpad(SIZE,x);
        prefresh(pad,0,0,0,0,y-1,x-1);
        signal(2,kill_handler);
        signal(15,kill_handler);
        while(1) {

        }
}
-------------------------------------------------

Setting SIZE to 32767 will work, but setting it to 32768 fails. I can
reproduce this with ncurses 5.4 and 5.5.

-- 
Phil Dibowitz                             address@hidden
Open Source software and tech docs        Insanity Palace of Metallica
http://www.phildev.net/                   http://www.ipom.com/

"Never write it in C if you can do it in 'awk';
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