[unix-history] / usr / src / games / backgammon / common_source / fancy.c

static char sccsid[] = "	fancy.c	4.2	82/11/22	";

#include "back.h"

char	PC;			/* padding character */
char	*BC;			/* backspace sequence */
char	*CD;			/* clear to end of screen sequence */
char	*CE;			/* clear to end of line sequence */
char	*CL;			/* clear screen sequence */
char	*CM;			/* cursor movement instructions */
char	*HO;			/* home cursor sequence */
char	*MC;			/* column cursor movement map */
char	*ML;			/* row cursor movement map */
char	*ND;			/* forward cursor sequence */
char	*UP;			/* up cursor sequence */

int	lHO;			/* length of HO */
int	lBC;			/* length of BC */
int	lND;			/* length of ND */
int	lUP;			/* length of UP */
int	CO;			/* number of columns */
int	LI;			/* number of lines */
int	*linect;		/* array of lengths of lines on screen
				   (the actual screen is not stored) */

				/* two letter codes */
char	tcap[] = "bccdceclcmhomcmlndup";
				/* corresponding strings */
char	**tstr[] = { &BC, &CD, &CE, &CL, &CM, &HO, &MC, &ML, &ND, &UP };

int	buffnum;		/* pointer to output buffer */

char	tbuf[1024];		/* buffer for decoded termcap entries */

int	oldb[] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

int	oldr;
int	oldw;
						/* "real" cursor positions, so
						 * it knows when to reposition.
						 * These are -1 if curr and curc
						 * are accurate */
int	realr;
int	realc;

fboard ()  {
	register int	i, j, l;

	curmove (0,0);				/* do top line */
	for (i = 0; i < 53; i++)
		fancyc ('_');

	curmove (15,0);				/* do botttom line */
	for (i = 0; i < 53; i++)
		fancyc ('_');

	l = 1;					/* do vertical lines */
	for (i = 52; i > -1; i -= 28)  {
		curmove ( (l == 1? 1: 15) ,i);
		fancyc ('|');
		for (j = 0; j < 14; j++)  {
			curmove (curr+l,curc-1);
			fancyc ('|');
		}
		if (i == 24)
			i += 32;
		l = -l;				/* alternate directions */
	}

	curmove (2,1);				/* label positions 13-18 */
	for (i = 13; i < 18; i++)  {
		fancyc ('1');
		fancyc ((i % 10)+'0');
		curmove (curr,curc+2);
	}
	fancyc ('1');
	fancyc ('8');

	curmove (2,29);				/* label positions 19-24 */
	fancyc ('1');
	fancyc ('9');
	for (i = 20; i < 25; i++)  {
		curmove (curr,curc+2);
		fancyc ('2');
		fancyc ((i % 10)+'0');
	}

	curmove (14,1);				/* label positions 12-7 */
	fancyc ('1');
	fancyc ('2');
	for (i = 11; i > 6; i--)  {
		curmove (curr,curc+2);
		fancyc (i > 9? '1': ' ');
		fancyc ((i % 10)+'0');
	}

	curmove (14,30);			/* label positions 6-1 */
	fancyc ('6');
	for (i = 5; i > 0; i--) {
		curmove (curr,curc+3);
		fancyc (i+'0');
	}

	for (i = 12; i > 6; i--)		/* print positions 12-7 */
		if (board[i])
			bsect (board[i],13,1+4*(12-i),-1);

	if (board[0])				/* print red men on bar */
		bsect (board[0],13,25,-1);

	for (i = 6; i > 0; i--)			/* print positions 6-1 */
		if (board[i])
			bsect (board[i],13,29+4*(6-i),-1);

	l = (off[1] < 0? off[1]+15: off[1]);	/* print white's home */
	bsect (l,3,54,1);

	curmove (8,25);				/* print the word BAR */
	fancyc ('B');
	fancyc ('A');
	fancyc ('R');

	for (i = 13; i < 19; i++)		/* print positions 13-18 */
		if (board[i])
			bsect (board[i],3,1+4*(i-13),1);

	if (board[25])				/* print white's men on bar */
		bsect (board[25],3,25,1);

	for (i = 19; i < 25; i++)		/* print positions 19-24 */
		if (board[i])
			bsect (board[i],3,29+4*(i-19),1);

	l = (off[0] < 0? off[0]+15: off[0]);	/* print red's home */
	bsect (-l,13,54,-1);

	for (i = 0; i < 26; i++)		/* save board position
						 * for refresh later */
		oldb[i] = board[i];
	oldr = (off[1] < 0? off[1]+15: off[1]);
	oldw = -(off[0] < 0? off[0]+15: off[0]);
}
\f
/*
 * bsect (b,rpos,cpos,cnext)
 *	Print the contents of a board position.  "b" has the value of the
 * position, "rpos" is the row to start printing, "cpos" is the column to
 * start printing, and "cnext" is positive if the position starts at the top
 * and negative if it starts at the bottom.  The value of "cpos" is checked
 * to see if the position is a player's home, since those are printed
 * differently.
 */

bsect (b,rpos,cpos,cnext)
int	b;					/* contents of position */
int	rpos;					/* row of position */
int	cpos;					/* column of position */
int	cnext;					/* direction of position */

{
	register int	j;			/* index */
	register int	n;			/* number of men on position */
	register int	bct;			/* counter */
	int		k;			/* index */
	char		pc;			/* color of men on position */

	n = abs(b);				/* initialize n and pc */
	pc = (b > 0? 'r': 'w');

	if (n < 6 && cpos < 54)			/* position cursor at start */
		curmove (rpos,cpos+1);
	else
		curmove (rpos,cpos);

	for (j = 0; j < 5; j++)  {		/* print position row by row */

		for (k = 0; k < 15; k += 5)		/* print men */
			if (n > j+k)
				fancyc (pc);

		if (j < 4)  {				/* figure how far to
							 * back up for next
							 * row */
			if (n < 6)  {			/* stop if none left */
				if (j+1 == n)
					break;
				bct = 1;		/* single column */
			} else  {
				if (n < 11)  {		/* two columns */
					if (cpos == 54)  {	/* home pos */
						if (j+5 >= n)
							bct = 1;
						else
							bct = 2;
					}
					if (cpos < 54)  {	/* not home */
						if (j+6 >= n)
							bct = 1;
						else
							bct = 2;
					}
				} else  {		/* three columns */
					if (j+10 >= n)
						bct = 2;
					else
						bct = 3;
				}
			}
			curmove (curr+cnext,curc-bct);	/* reposition cursor */
		}
	}
}
\f
refresh()  {
	register int	i, r, c;

	r = curr;				/* save current position */
	c = curc;

	for (i = 12; i > 6; i--)		/* fix positions 12-7 */
		if (board[i] != oldb[i])  {
			fixpos (oldb[i],board[i],13,1+(12-i)*4,-1);
			oldb[i] = board[i];
		}

	if (board[0] != oldb[0])  {		/* fix red men on bar */
		fixpos (oldb[0],board[0],13,25,-1);
		oldb[0] = board[0];
	}

	for (i = 6; i > 0; i--)			/* fix positions 6-1 */
		if (board[i] != oldb[i])  {
			fixpos (oldb[i],board[i],13,29+(6-i)*4,-1);
			oldb[i] = board[i];
		}

	i = -(off[0] < 0? off[0]+15: off[0]);	/* fix white's home */
	if (oldw != i)  {
		fixpos (oldw,i,13,54,-1);
		oldw = i;
	}

	for (i = 13; i < 19; i++)		/* fix positions 13-18 */
		if (board[i] != oldb[i])  {
			fixpos (oldb[i],board[i],3,1+(i-13)*4,1);
			oldb[i] = board[i];
		}

	if (board[25] != oldb[25])  {		/* fix white men on bar */
		fixpos (oldb[25],board[25],3,25,1);
		oldb[25] = board[25];
	}

	for (i = 19; i < 25; i++)		/* fix positions 19-24 */
		if (board[i] != oldb[i])  {
			fixpos (oldb[i],board[i],3,29+(i-19)*4,1);
			oldb[i] = board[i];
		}

	i = (off[1] < 0? off[1]+15: off[1]);	/* fix red's home */
	if (oldr != i)  {
		fixpos (oldr,i,3,54,1);
		oldr = i;
	}

	curmove (r,c);				/* return to saved position */
	newpos();
	buflush();
}
\f
fixpos (old,new,r,c,inc)
int	old, new, r, c, inc;

{
	register int	o, n, nv;
	int		ov, nc;
	char		col;

	if (old*new >= 0)  {
		ov = abs(old);
		nv = abs(new);
		col = (old+new > 0? 'r': 'w');
		o = (ov-1)/5;
		n = (nv-1)/5;
		if (o == n)  {
			if (o == 2)
				nc = c+2;
			if (o == 1)
				nc = c < 54? c: c+1;
			if (o == 0)
				nc = c < 54? c+1: c;
			if (ov > nv)
				fixcol (r+inc*(nv-n*5),nc,abs(ov-nv),' ',inc);
			else
				fixcol (r+inc*(ov-o*5),nc,abs(ov-nv),col,inc);
			return;
		} else  {
			if (c < 54)  {
				if (o+n == 1)  {
					if (n)  {
						fixcol (r,c,abs(nv-5),col,inc);
						if (ov != 5)
							fixcol (r+inc*ov,c+1,abs(ov-5),col,inc);
					} else  {
						fixcol (r,c,abs(ov-5),' ',inc);
						if (nv != 5)
							fixcol (r+inc*nv,c+1,abs(nv-5),' ',inc);
					}
					return;
				}
				if (n == 2)  {
					if (ov != 10)
						fixcol (r+inc*(ov-5),c,abs(ov-10),col,inc);
					fixcol (r,c+2,abs(nv-10),col,inc);
				} else  {
					if (nv != 10)
						fixcol (r+inc*(nv-5),c,abs(nv-10),' ',inc);
					fixcol (r,c+2,abs(ov-10),' ',inc);
				}
				return;
			}
			if (n > o)  {
				fixcol (r+inc*(ov%5),c+o,abs(5*n-ov),col,inc);
				if (nv != 5*n)
					fixcol (r,c+n,abs(5*n-nv),col,inc);
			} else  {
				fixcol (r+inc*(nv%5),c+n,abs(5*n-nv),' ',inc);
				if (ov != 5*o)
					fixcol (r,c+o,abs(5*o-ov),' ',inc);
			}
			return;
		}
	}
	nv = abs(new);
	fixcol (r,c+1,nv,new > 0? 'r': 'w',inc);
	if (abs(old) <= abs(new))
		return;
	fixcol (r+inc*new,c+1,abs(old+new),' ',inc);
}

fixcol (r,c,l,ch,inc)
register int	l, ch;
int		r, c, inc;

{
	register int	i;

	curmove (r,c);
	fancyc (ch);
	for (i = 1; i < l; i++)  {
		curmove (curr+inc,curc-1);
		fancyc (ch);
	}
}
\f
curmove (r,c)
register int	r, c;

{
	if (curr == r && curc == c)
		return;
	if (realr == -1)  {
		realr = curr;
		realc = curc;
	}
	curr = r;
	curc = c;
}

newpos ()  {
	register int	r;		/* destination row */
	register int	c;		/* destination column */
	register int	mode = -1;	/* mode of movement */

	int	count = 1000;		/* character count */
	int	i;			/* index */
	int	j;			/* index */
	int	n;			/* temporary variable */
	char	*m;			/* string containing CM movement */
	int	addbuf();		/* add a char to the output buffer */


	if (realr == -1)		/* see if already there */
		return;

	r = curr;			/* set current and dest. positions */
	c = curc;
	curr = realr;
	curc = realc;

					/* double check position */
	if (curr == r && curc == c)  {
		realr = realc = -1;
		return;
	}

	if (CM)  {			/* try CM to get there */
		mode = 0;
		m = tgoto (CM,c,r);
		count = strlen (m);
	}

					/* try HO and local movement */
	if (HO && (n = r+c*lND+lHO) < count)  {
		mode = 1;
		count = n;
	}

					/* try various LF combinations */
	if (r >= curr)  {
						/* CR, LF, and ND */
		if ((n = (r-curr)+c*lND+1) < count)  {
			mode = 2;
			count = n;
		}
						/* LF, ND */
		if (c >= curc && (n = (r-curr)+(c-curc)*lND) < count)  {
			mode = 3;
			count = n;
		}
						/* LF, BS */
		if (c < curc && (n = (r-curr)+(curc-c)*lBC) < count)  {
			mode = 4;
			count = n;
		}
	}

					/* try corresponding UP combinations */
	if (r < curr)  {
						/* CR, UP, and ND */
		if ((n = (curr-r)*lUP+c*lND+1) < count)  {
			mode = 5;
			count = n;
		}
						/* UP and ND */
		if (c >= curc && (n = (curr-r)*lUP+(c-curc)*lND) < count)  {
			mode = 6;
			count = n;
		}
						/* UP and BS */
		if (c < curc && (n = (curr-r)*lUP+(curc-c)*lBC) < count)  {
			mode = 7;
			count = n;
		}
	}

						/* space over */
	if (curr == r && c > curc && linect[r] < curc && c-curc < count)
		mode = 8;

	switch (mode)  {

	case -1:				/* error! */
		write (2,"\r\nInternal cursor error.\r\n",26);
		getout();

						/* direct cursor motion */
	case  0:
		tputs (m,abs(curr-r),addbuf);
		break;

						/* relative to "home" */
	case  1:
		tputs (HO,r,addbuf);
		for (i = 0; i < r; i++)
			addbuf ('\012');
		for (i = 0; i < c; i++)
			tputs (ND,1,addbuf);
		break;

						/* CR and down and over */
	case  2:
		addbuf ('\015');
		for (i = 0; i < r-curr; i++)
			addbuf ('\012');
		for (i = 0; i < c; i++)
			tputs (ND,1,addbuf);
		break;
	
						/* down and over */
	case  3:
		for (i = 0; i < r-curr; i++)
			addbuf ('\012');
		for (i = 0; i < c-curc; i++)
			tputs (ND,1,addbuf);
		break;
	
						/* down and back */
	case  4:
		for (i = 0; i < r-curr; i++)
			addbuf ('\012');
		for (i = 0; i < curc-c; i++)
			addbuf ('\010');
		break;
	
						/* CR and up and over */
	case  5:
		addbuf ('\015');
		for (i = 0; i < curr-r; i++)
			tputs (UP,1,addbuf);
		for (i = 0; i < c; i++)
			tputs (ND,1,addbuf);
		break;
	
						/* up and over */
	case  6:
		for (i = 0; i < curr-r; i++)
			tputs (UP,1,addbuf);
		for (i = 0; i < c-curc; i++)
			tputs (ND,1,addbuf);
		break;
	
						/* up and back */
	case  7:
		for (i = 0; i < curr-r; i++)
			tputs (UP,1,addbuf);
		for (i = 0; i < curc-c; i++)  {
			if (BC)
				tputs (BC,1,addbuf);
			else
				addbuf ('\010');
		}
		break;

						/* safe space */
	case  8:
		for (i = 0; i < c-curc; i++)
			addbuf (' ');
	}

						/* fix positions */
	curr = r;
	curc = c;
	realr = -1;
	realc = -1;
}
\f
clear ()  {
	register int	i;
	int		addbuff();

					/* double space if can't clear */
	if (CL == 0)  {
		writel ("\n\n");
		return;
	}

	curr = curc = 0;		/* fix position markers */
	realr = realc = -1;
	for (i = 0; i < 24; i++)	/* clear line counts */
		linect[i] = -1;
	buffnum = -1;			/* ignore leftover buffer contents */
	tputs (CL,CO,addbuf);		/* put CL in buffer */
}

tos ()  {				/* home cursor */
	curmove (0,0);
}
\f
fancyc (c)
register char	c;			/* character to output */
{
	register int	sp;		/* counts spaces in a tab */

	if (c == '\007')  {		/* bells go in blindly */
		addbuf (c);
		return;
	}

					/* process tabs, use spaces if the
					 * the tab should be erasing things,
					 * otherwise use cursor movement
					 * routines.  Note this does not use
					 * hardware tabs at all. */
	if (c == '\t')  {
		sp = (curc+8) & (~ 7);		/* compute spaces */
						/* check line length */
		if (linect[curr] >= curc || sp < 4)  {
			for (; sp > curc; sp--)
				addbuf (' ');
			curc = sp;		/* fix curc */
		} else
			curmove (curr,sp);
		return;
	}

					/* do newline be calling newline */
	if (c == '\n')  {
		newline();
		return;
	}

					/* ignore any other control chars */
	if (c < ' ')
		return;

					/* if an erasing space or non-space,
					 * just add it to buffer.  Otherwise
					 * use cursor movement routine, so that
					 * multiple spaces will be grouped
					 * together */
	if (c > ' ' || linect[curr] >= curc)  {
		newpos ();			/* make sure position correct */
		addbuf (c);			/* add character to buffer */
						/* fix line length */
		if (c == ' ' && linect[curr] == curc)
			linect[curr]--;
		else if (linect[curr] < curc)
			linect[curr] = curc;
		curc++;				/* fix curc */
	} else
					/* use cursor movement routine */
		curmove (curr,curc+1);
}
\f
clend()  {
	register int	i;
	register char	*s;
	int		addbuf();


	if (CD)  {
		tputs (CD,CO-curr,addbuf);
		for (i = curr; i < LI; i++)
			linect[i] = -1;
		return;
	}

	curmove (i = curr,0);
	cline();
	while (curr < LI-1)  {
		curmove (curr+1,0);
		if (linect[curr] > -1)
			cline ();
	}
	curmove (i,0);
}

cline ()  {
	register int	i;
	register int	c;
	register char	*s;
	int		addbuf();

	if (curc > linect[curr])
		return;
	newpos ();
	if (CE)  {
		tputs (CE,1,addbuf);
		linect[curr] = curc-1;
	} else  {
		c = curc-1;
		while (linect[curr] > c)  {
			addbuf (' ');
			curc++;
			linect[curr]--;
		}
		curmove (curr,c+1);
	}
}

newline ()  {
	cline();
	if (curr == LI-1)
		curmove (begscr,0);
	else
		curmove (curr+1,0);
}
\f
getcaps (s)
register char	*s;

{
	register char	*code;		/* two letter code */
	register char	***cap;		/* pointer to cap string */
	char		*bufp;		/* pointer to cap buffer */
	char		tentry[1024];	/* temporary uncoded caps buffer */

	tgetent (tentry,s);		/* get uncoded termcap entry */

	LI = tgetnum ("li");		/* get number of lines */
	if (LI == -1)
		LI = 12;
	CO = tgetnum ("co");		/* get number of columns */
	if (CO == -1)
		CO = 65;

	bufp = tbuf;			/* get padding character */
	tgetstr ("pc",&bufp);
	if (bufp != tbuf)
		PC = *tbuf;
	else
		PC = 0;

	bufp = tbuf;			/* get string entries */
	cap = tstr;
	for (code = tcap; *code; code += 2)
		**cap++ = tgetstr (code,&bufp);

					/* get pertinent lengths */
	if (HO)
		lHO = strlen (HO);
	if (BC)
		lBC = strlen (BC);
	else
		lBC = 1;
	if (UP)
		lUP = strlen (UP);
	if (ND)
		lND = strlen (ND);
	if (LI < 24 || CO < 72 || !(CL && UP && ND))
		return (0);
	linect = calloc (LI+1,sizeof(int));
	return (1);
}
Commit	Line	Data
0d3577ce	1	static char sccsid[] = " fancy.c 4.2 82/11/22 ";
a95eadb9 RH	2
	3	#include "back.h"
	4
	5	char PC; /* padding character */
	6	char BC; / backspace sequence */
	7	char CD; / clear to end of screen sequence */
	8	char CE; / clear to end of line sequence */
	9	char CL; / clear screen sequence */
	10	char CM; / cursor movement instructions */
	11	char HO; / home cursor sequence */
	12	char MC; / column cursor movement map */
	13	char ML; / row cursor movement map */
	14	char ND; / forward cursor sequence */
	15	char UP; / up cursor sequence */
	16
	17	int lHO; /* length of HO */
	18	int lBC; /* length of BC */
	19	int lND; /* length of ND */
	20	int lUP; /* length of UP */
	21	int CO; /* number of columns */
	22	int LI; /* number of lines */
	23	int linect; / array of lengths of lines on screen
	24	(the actual screen is not stored) */
	25
	26	/* two letter codes */
	27	char tcap[] = "bccdceclcmhomcmlndup";
	28	/* corresponding strings */
	29	char **tstr[] = { &BC, &CD, &CE, &CL, &CM, &HO, &MC, &ML, &ND, &UP };
	30
	31	int buffnum; /* pointer to output buffer */
	32
	33	char tbuf[1024]; /* buffer for decoded termcap entries */
	34
	35	int oldb[] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
	36
	37	int oldr;
	38	int oldw;
	39	/* "real" cursor positions, so
	40	* it knows when to reposition.
	41	* These are -1 if curr and curc
	42	* are accurate */
	43	int realr;
	44	int realc;
	45
	46	fboard () {
	47	register int i, j, l;
	48
	49	curmove (0,0); /* do top line */
	50	for (i = 0; i < 53; i++)
	51	fancyc ('_');
	52
	53	curmove (15,0); /* do botttom line */
	54	for (i = 0; i < 53; i++)
	55	fancyc ('_');
	56
	57	l = 1; /* do vertical lines */
	58	for (i = 52; i > -1; i -= 28) {
	59	curmove ( (l == 1? 1: 15) ,i);
	60	fancyc ('\|');
	61	for (j = 0; j < 14; j++) {
	62	curmove (curr+l,curc-1);
	63	fancyc ('\|');
	64	}
	65	if (i == 24)
66	i += 32;
67	l = -l; /* alternate directions */
68	}
69
70	curmove (2,1); /* label positions 13-18 */
71	for (i = 13; i < 18; i++) {
72	fancyc ('1');
73	fancyc ((i % 10)+'0');
74	curmove (curr,curc+2);
75	}
76	fancyc ('1');
77	fancyc ('8');
78
79	curmove (2,29); /* label positions 19-24 */
80	fancyc ('1');
81	fancyc ('9');
82	for (i = 20; i < 25; i++) {
83	curmove (curr,curc+2);
84	fancyc ('2');
85	fancyc ((i % 10)+'0');
86	}
87
88	curmove (14,1); /* label positions 12-7 */
89	fancyc ('1');
90	fancyc ('2');
91	for (i = 11; i > 6; i--) {
92	curmove (curr,curc+2);
93	fancyc (i > 9? '1': ' ');
94	fancyc ((i % 10)+'0');
95	}
96
97	curmove (14,30); /* label positions 6-1 */
98	fancyc ('6');
99	for (i = 5; i > 0; i--) {
100	curmove (curr,curc+3);
101	fancyc (i+'0');
102	}
103
104	for (i = 12; i > 6; i--) /* print positions 12-7 */
105	if (board[i])
106	bsect (board[i],13,1+4*(12-i),-1);
107
108	if (board[0]) /* print red men on bar */
109	bsect (board[0],13,25,-1);
110
111	for (i = 6; i > 0; i--) /* print positions 6-1 */
112	if (board[i])
113	bsect (board[i],13,29+4*(6-i),-1);
114
115	l = (off[1] < 0? off[1]+15: off[1]); /* print white's home */
116	bsect (l,3,54,1);
117
118	curmove (8,25); /* print the word BAR */
119	fancyc ('B');
120	fancyc ('A');
121	fancyc ('R');
122
123	for (i = 13; i < 19; i++) /* print positions 13-18 */
124	if (board[i])
125	bsect (board[i],3,1+4*(i-13),1);
126
127	if (board[25]) /* print white's men on bar */
128	bsect (board[25],3,25,1);
129
130	for (i = 19; i < 25; i++) /* print positions 19-24 */
131	if (board[i])
132	bsect (board[i],3,29+4*(i-19),1);
133
134	l = (off[0] < 0? off[0]+15: off[0]); /* print red's home */
135	bsect (-l,13,54,-1);
136
137	for (i = 0; i < 26; i++) /* save board position
138	* for refresh later */
139	oldb[i] = board[i];
140	oldr = (off[1] < 0? off[1]+15: off[1]);
141	oldw = -(off[0] < 0? off[0]+15: off[0]);
142	}
143	\f
144	/*
145	* bsect (b,rpos,cpos,cnext)
146	* Print the contents of a board position. "b" has the value of the
147	* position, "rpos" is the row to start printing, "cpos" is the column to
148	* start printing, and "cnext" is positive if the position starts at the top
149	* and negative if it starts at the bottom. The value of "cpos" is checked
150	* to see if the position is a player's home, since those are printed
151	* differently.
152	*/
153
154	bsect (b,rpos,cpos,cnext)
155	int b; /* contents of position */
156	int rpos; /* row of position */
157	int cpos; /* column of position */
158	int cnext; /* direction of position */
159
160	{
161	register int j; /* index */
162	register int n; /* number of men on position */
163	register int bct; /* counter */
164	int k; /* index */
165	char pc; /* color of men on position */
166
167	n = abs(b); /* initialize n and pc */
168	pc = (b > 0? 'r': 'w');
169
170	if (n < 6 && cpos < 54) /* position cursor at start */
171	curmove (rpos,cpos+1);
172	else
173	curmove (rpos,cpos);
174
175	for (j = 0; j < 5; j++) { /* print position row by row */
176
177	for (k = 0; k < 15; k += 5) /* print men */
178	if (n > j+k)
179	fancyc (pc);
180
181	if (j < 4) { /* figure how far to
182	* back up for next
183	* row */
184	if (n < 6) { /* stop if none left */
185	if (j+1 == n)
186	break;
187	bct = 1; /* single column */
188	} else {
189	if (n < 11) { /* two columns */
190	if (cpos == 54) { /* home pos */
191	if (j+5 >= n)
192	bct = 1;
193	else
194	bct = 2;
195	}
196	if (cpos < 54) { /* not home */
197	if (j+6 >= n)
198	bct = 1;
199	else
200	bct = 2;
201	}
202	} else { /* three columns */
203	if (j+10 >= n)
204	bct = 2;
205	else
206	bct = 3;
207	}
208	}
209	curmove (curr+cnext,curc-bct); /* reposition cursor */
210	}
211	}
212	}
213	\f
214	refresh() {
215	register int i, r, c;
216
217	r = curr; /* save current position */
218	c = curc;
219
220	for (i = 12; i > 6; i--) /* fix positions 12-7 */
221	if (board[i] != oldb[i]) {
222	fixpos (oldb[i],board[i],13,1+(12-i)*4,-1);
223	oldb[i] = board[i];
224	}
225
226	if (board[0] != oldb[0]) { /* fix red men on bar */
227	fixpos (oldb[0],board[0],13,25,-1);
228	oldb[0] = board[0];
229	}
230
231	for (i = 6; i > 0; i--) /* fix positions 6-1 */
232	if (board[i] != oldb[i]) {
233	fixpos (oldb[i],board[i],13,29+(6-i)*4,-1);
234	oldb[i] = board[i];
235	}
236
237	i = -(off[0] < 0? off[0]+15: off[0]); /* fix white's home */
238	if (oldw != i) {
239	fixpos (oldw,i,13,54,-1);
240	oldw = i;
241	}
242
243	for (i = 13; i < 19; i++) /* fix positions 13-18 */
244	if (board[i] != oldb[i]) {
245	fixpos (oldb[i],board[i],3,1+(i-13)*4,1);
246	oldb[i] = board[i];
247	}
248
249	if (board[25] != oldb[25]) { /* fix white men on bar */
250	fixpos (oldb[25],board[25],3,25,1);
251	oldb[25] = board[25];
252	}
253
254	for (i = 19; i < 25; i++) /* fix positions 19-24 */
255	if (board[i] != oldb[i]) {
256	fixpos (oldb[i],board[i],3,29+(i-19)*4,1);
257	oldb[i] = board[i];
258	}
259
260	i = (off[1] < 0? off[1]+15: off[1]); /* fix red's home */
261	if (oldr != i) {
262	fixpos (oldr,i,3,54,1);
263	oldr = i;
264	}
265
266	curmove (r,c); /* return to saved position */
267	newpos();
268	buflush();
269	}
270	\f
271	fixpos (old,new,r,c,inc)
272	int old, new, r, c, inc;
273
274	{
275	register int o, n, nv;
276	int ov, nc;
277	char col;
278
279	if (old*new >= 0) {
280	ov = abs(old);
281	nv = abs(new);
282	col = (old+new > 0? 'r': 'w');
283	o = (ov-1)/5;
284	n = (nv-1)/5;
285	if (o == n) {
286	if (o == 2)
287	nc = c+2;
288	if (o == 1)
289	nc = c < 54? c: c+1;
290	if (o == 0)
291	nc = c < 54? c+1: c;
292	if (ov > nv)
293	fixcol (r+inc(nv-n5),nc,abs(ov-nv),' ',inc);
294	else
295	fixcol (r+inc(ov-o5),nc,abs(ov-nv),col,inc);
296	return;
297	} else {
298	if (c < 54) {
299	if (o+n == 1) {
300	if (n) {
301	fixcol (r,c,abs(nv-5),col,inc);
302	if (ov != 5)
303	fixcol (r+inc*ov,c+1,abs(ov-5),col,inc);
304	} else {
305	fixcol (r,c,abs(ov-5),' ',inc);
306	if (nv != 5)
307	fixcol (r+inc*nv,c+1,abs(nv-5),' ',inc);
308	}
309	return;
310	}
311	if (n == 2) {
312	if (ov != 10)
313	fixcol (r+inc*(ov-5),c,abs(ov-10),col,inc);
314	fixcol (r,c+2,abs(nv-10),col,inc);
315	} else {
316	if (nv != 10)
317	fixcol (r+inc*(nv-5),c,abs(nv-10),' ',inc);
318	fixcol (r,c+2,abs(ov-10),' ',inc);
319	}
320	return;
321	}
322	if (n > o) {
323	fixcol (r+inc(ov%5),c+o,abs(5n-ov),col,inc);
324	if (nv != 5*n)
325	fixcol (r,c+n,abs(5*n-nv),col,inc);
326	} else {
327	fixcol (r+inc(nv%5),c+n,abs(5n-nv),' ',inc);
328	if (ov != 5*o)
329	fixcol (r,c+o,abs(5*o-ov),' ',inc);
330	}
331	return;
332	}
333	}
334	nv = abs(new);
335	fixcol (r,c+1,nv,new > 0? 'r': 'w',inc);
336	if (abs(old) <= abs(new))
337	return;
338	fixcol (r+inc*new,c+1,abs(old+new),' ',inc);
339	}
340
341	fixcol (r,c,l,ch,inc)
342	register int l, ch;
343	int r, c, inc;
344
345	{
346	register int i;
347
348	curmove (r,c);
349	fancyc (ch);
350	for (i = 1; i < l; i++) {
351	curmove (curr+inc,curc-1);
352	fancyc (ch);
353	}
354	}
355	\f
356	curmove (r,c)
357	register int r, c;
358
359	{
360	if (curr == r && curc == c)
361	return;
362	if (realr == -1) {
363	realr = curr;
364	realc = curc;
365	}
366	curr = r;
367	curc = c;
368	}
369
370	newpos () {
371	register int r; /* destination row */
372	register int c; /* destination column */
373	register int mode = -1; /* mode of movement */
374
375	int count = 1000; /* character count */
376	int i; /* index */
377	int j; /* index */
378	int n; /* temporary variable */
379	char m; / string containing CM movement */
380	int addbuf(); /* add a char to the output buffer */
381
382
383	if (realr == -1) /* see if already there */
384	return;
385
386	r = curr; /* set current and dest. positions */
387	c = curc;
388	curr = realr;
389	curc = realc;
390
391	/* double check position */
392	if (curr == r && curc == c) {
393	realr = realc = -1;
394	return;
395	}
396
397	if (CM) { /* try CM to get there */
398	mode = 0;
399	m = tgoto (CM,c,r);
400	count = strlen (m);
401	}
402
403	/* try HO and local movement */
404	if (HO && (n = r+c*lND+lHO) < count) {
405	mode = 1;
406	count = n;
407	}
408
409	/* try various LF combinations */
410	if (r >= curr) {
411	/* CR, LF, and ND */
412	if ((n = (r-curr)+c*lND+1) < count) {
413	mode = 2;
414	count = n;
415	}
416	/* LF, ND */
417	if (c >= curc && (n = (r-curr)+(c-curc)*lND) < count) {
418	mode = 3;
419	count = n;
420	}
421	/* LF, BS */
422	if (c < curc && (n = (r-curr)+(curc-c)*lBC) < count) {
423	mode = 4;
424	count = n;
425	}
426	}
427
428	/* try corresponding UP combinations */
429	if (r < curr) {
430	/* CR, UP, and ND */
431	if ((n = (curr-r)lUP+clND+1) < count) {
432	mode = 5;
433	count = n;
434	}
435	/* UP and ND */
436	if (c >= curc && (n = (curr-r)lUP+(c-curc)lND) < count) {
437	mode = 6;
438	count = n;
439	}
440	/* UP and BS */
441	if (c < curc && (n = (curr-r)lUP+(curc-c)lBC) < count) {
442	mode = 7;
443	count = n;
444	}
445	}
446
447	/* space over */
448	if (curr == r && c > curc && linect[r] < curc && c-curc < count)
449	mode = 8;
450
451	switch (mode) {
452
453	case -1: /* error! */
454	write (2,"\r\nInternal cursor error.\r\n",26);
455	getout();
456
457	/* direct cursor motion */
458	case 0:
459	tputs (m,abs(curr-r),addbuf);
460	break;
461
462	/* relative to "home" */
463	case 1:
464	tputs (HO,r,addbuf);
465	for (i = 0; i < r; i++)
466	addbuf ('\012');
467	for (i = 0; i < c; i++)
468	tputs (ND,1,addbuf);
469	break;
470
471	/* CR and down and over */
472	case 2:
473	addbuf ('\015');
474	for (i = 0; i < r-curr; i++)
475	addbuf ('\012');
476	for (i = 0; i < c; i++)
477	tputs (ND,1,addbuf);
478	break;
479
480	/* down and over */
481	case 3:
482	for (i = 0; i < r-curr; i++)
483	addbuf ('\012');
484	for (i = 0; i < c-curc; i++)
485	tputs (ND,1,addbuf);
486	break;
487
488	/* down and back */
489	case 4:
490	for (i = 0; i < r-curr; i++)
491	addbuf ('\012');
492	for (i = 0; i < curc-c; i++)
493	addbuf ('\010');
494	break;
495
496	/* CR and up and over */
497	case 5:
498	addbuf ('\015');
499	for (i = 0; i < curr-r; i++)
500	tputs (UP,1,addbuf);
501	for (i = 0; i < c; i++)
502	tputs (ND,1,addbuf);
503	break;
504
505	/* up and over */
506	case 6:
507	for (i = 0; i < curr-r; i++)
508	tputs (UP,1,addbuf);
509	for (i = 0; i < c-curc; i++)
510	tputs (ND,1,addbuf);
511	break;
512
513	/* up and back */
514	case 7:
515	for (i = 0; i < curr-r; i++)
516	tputs (UP,1,addbuf);
517	for (i = 0; i < curc-c; i++) {
518	if (BC)
519	tputs (BC,1,addbuf);
520	else
521	addbuf ('\010');
522	}
523	break;
524
525	/* safe space */
526	case 8:
527	for (i = 0; i < c-curc; i++)
528	addbuf (' ');
529	}
530
531	/* fix positions */
532	curr = r;
533	curc = c;
534	realr = -1;
535	realc = -1;
536	}
537	\f
538	clear () {
539	register int i;
540	int addbuff();
541
542	/* double space if can't clear */
543	if (CL == 0) {
544	writel ("\n\n");
545	return;
546	}
547
548	curr = curc = 0; /* fix position markers */
549	realr = realc = -1;
550	for (i = 0; i < 24; i++) /* clear line counts */
551	linect[i] = -1;
552	buffnum = -1; /* ignore leftover buffer contents */
553	tputs (CL,CO,addbuf); /* put CL in buffer */
554	}
555
556	tos () { /* home cursor */
557	curmove (0,0);
558	}
559	\f
560	fancyc (c)
561	register char c; /* character to output */
562	{
563	register int sp; /* counts spaces in a tab */
564
565	if (c == '\007') { /* bells go in blindly */
566	addbuf (c);
567	return;
568	}
569
570	/* process tabs, use spaces if the
571	* the tab should be erasing things,
572	* otherwise use cursor movement
573	* routines. Note this does not use
574	* hardware tabs at all. */
575	if (c == '\t') {
576	sp = (curc+8) & (~ 7); /* compute spaces */
577	/* check line length */
578	if (linect[curr] >= curc \|\| sp < 4) {
579	for (; sp > curc; sp--)
580	addbuf (' ');
581	curc = sp; /* fix curc */
582	} else
583	curmove (curr,sp);
584	return;
585	}
586
587	/* do newline be calling newline */
588	if (c == '\n') {
589	newline();
590	return;
591	}
592
593	/* ignore any other control chars */
594	if (c < ' ')
595	return;
596
597	/* if an erasing space or non-space,
598	* just add it to buffer. Otherwise
599	* use cursor movement routine, so that
600	* multiple spaces will be grouped
601	* together */
602	if (c > ' ' \|\| linect[curr] >= curc) {
603	newpos (); /* make sure position correct */
604	addbuf (c); /* add character to buffer */
605	/* fix line length */
606	if (c == ' ' && linect[curr] == curc)
607	linect[curr]--;
608	else if (linect[curr] < curc)
609	linect[curr] = curc;
610	curc++; /* fix curc */
611	} else
612	/* use cursor movement routine */
613	curmove (curr,curc+1);
614	}
615	\f
616	clend() {
617	register int i;
618	register char *s;
619	int addbuf();
620
621
622	if (CD) {
623	tputs (CD,CO-curr,addbuf);
624	for (i = curr; i < LI; i++)
625	linect[i] = -1;
626	return;
627	}
628
629	curmove (i = curr,0);
630	cline();
631	while (curr < LI-1) {
632	curmove (curr+1,0);
633	if (linect[curr] > -1)
634	cline ();
635	}
636	curmove (i,0);
637	}
638
639	cline () {
640	register int i;
641	register int c;
642	register char *s;
643	int addbuf();
644
645	if (curc > linect[curr])
646	return;
647	newpos ();
648	if (CE) {
649	tputs (CE,1,addbuf);
650	linect[curr] = curc-1;
651	} else {
652	c = curc-1;
653	while (linect[curr] > c) {
654	addbuf (' ');
655	curc++;
656	linect[curr]--;
657	}
658	curmove (curr,c+1);
659	}
660	}
661
662	newline () {
663	cline();
664	if (curr == LI-1)
665	curmove (begscr,0);
666	else
667	curmove (curr+1,0);
668	}
669	\f
670	getcaps (s)
671	register char *s;
672
673	{
674	register char code; / two letter code */
675	register char **cap; / pointer to cap string */
676	char bufp; / pointer to cap buffer */
677	char tentry[1024]; /* temporary uncoded caps buffer */
678
679	tgetent (tentry,s); /* get uncoded termcap entry */
680
681	LI = tgetnum ("li"); /* get number of lines */
682	if (LI == -1)
683	LI = 12;
684	CO = tgetnum ("co"); /* get number of columns */
685	if (CO == -1)
686	CO = 65;
687
688	bufp = tbuf; /* get padding character */
689	tgetstr ("pc",&bufp);
690	if (bufp != tbuf)
691	PC = *tbuf;
692	else
693	PC = 0;
694
695	bufp = tbuf; /* get string entries */
696	cap = tstr;
697	for (code = tcap; *code; code += 2)
698	**cap++ = tgetstr (code,&bufp);
699
700	/* get pertinent lengths */
701	if (HO)
702	lHO = strlen (HO);
703	if (BC)
704	lBC = strlen (BC);
705	else
706	lBC = 1;
707	if (UP)
708	lUP = strlen (UP);
709	if (ND)
710	lND = strlen (ND);
711	if (LI < 24 \|\| CO < 72 \|\| !(CL && UP && ND))
712	return (0);
0d3577ce	713	linect = calloc (LI+1,sizeof(int));
a95eadb9 RH	714	return (1);
a95eadb9 RH	715	}