usr/src/lib/libplot/dumb/open.c

/*-
 * Copyright (c) 1980, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This module is believed to contain source code proprietary to AT&T.
 * Use and redistribution is subject to the Berkeley Software License
 * Agreement and your Software Agreement with AT&T (Western Electric).
 */

#ifndef lint
static char sccsid[] = "@(#)open.c      8.1 (Berkeley) 6/4/93";
#endif /* not lint */

/*
 * This accepts plot file formats and produces the appropriate plots
 * for dumb terminals.  It can also be used for printing terminals and
 * lineprinter listings, although there is no way to specify number of
 * lines and columns different from your terminal.  This would be easy
 * to change, and is left as an exercise for the reader.
 */

#include <signal.h>
#include "dumb.h"

int minX, rangeX;       /* min and range of x */
int minY, rangeY;       /* min and range of y */
int currentx,currenty;
int COLS,LINES;

/* A very large screen! (probably should use malloc) */
char screenmat[MAXCOLS][MAXLINES];

openpl()
{
        void closepl();
        int i, j;
        char *term, *getenv();
        char bp[1024];

        term = getenv("TERM");
        tgetent(bp, term);

        COLS = tgetnum("co");
        if (COLS > MAXCOLS)
                COLS = MAXCOLS;
        if (COLS < 0)
                COLS = 48;      /* lower bound on # of cols? */
        COLS--;                         /* prevent auto wrap */

        LINES = tgetnum("li");
        if (LINES > MAXLINES)
                LINES = MAXLINES;
        if (LINES < 0)
                LINES = 20;     /* lower bound on # of lines? */

        for(i=0; i<COLS; i++)
                for(j=0; j<LINES; j++)
                        screenmat[i][j] = ' ';

        signal(SIGINT, closepl);
        currentx = currenty = 0;
}