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BSD 4_1c_2 development
[unix-history] / usr / src / games / backgammon / 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);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.