static void prompt(char *filename)
{
if (clreol)
cleareol();
else if (promptlen > 0)
kill_line();
if (!hard) {
promptlen = 0;
if (Senter && Sexit) {
putstring(Senter);
promptlen += (2 * soglitch);
}
if (clreol)
cleareol();
promptlen += printf(_("--More--"));
if (filename != NULL) {
promptlen += printf(_("(Next file: %s)"), filename);
} else if (!no_intty) {
promptlen +=
printf("(%d%%)",
(int)((file_pos * 100) / file_size));
}
if (dum_opt) {
promptlen +=
printf(_("[Press space to continue, 'q' to quit.]"));
}
if (Senter && Sexit)
putstring(Sexit);
if (clreol)
clreos();
fflush(stdout);
} else
ringbell();
inwait++;
}
int pre_op(int keynum)
{
if (keynum==-1) return(0);
errno = 0; /* for non-IEEE machines */
if ( (entered==3) && !(keynum==kCLR || keynum==kOFF)) {
if (rpn) {
clrdisp++;
} else {
ringbell();
return(1); /* the intent was probably not to do the operation */
}
}
if (keynum != kCLR) CLR=0;
return(0);
}
void
emulate(void)
{
char buf[BUFS+1];
int i;
int n;
int c;
int operand[10];
int noperand;
int savex, savey, saveattr, saveisgraphics;
int isgraphics;
int g0set, g1set;
int dch;
isgraphics = 0;
g0set = 'B'; /* US ASCII */
g1set = 'B'; /* US ASCII */
savex = savey = 0;
yscrmin = 0;
yscrmax = ymax;
saveattr = 0;
saveisgraphics = 0;
/* set initial tab stops to DEC-standard 8-column spacing */
for(c=0; (c+=8)<nelem(tabcol);)
tabcol[c] = 1;
for (;;) {
if (y > ymax) {
x = 0;
newline();
}
buf[0] = get_next_char();
buf[1] = '\0';
switch(buf[0]) {
case '\000':
case '\001':
case '\002':
case '\003':
case '\004':
case '\005':
case '\006':
goto Default;
case '\007': /* bell */
ringbell();
break;
case '\010': /* backspace */
if (x > 0)
--x;
break;
case '\011': /* tab to next tab stop; if none, to right margin */
for(c=x+1; c<nelem(tabcol) && !tabcol[c]; c++)
;
if(c < nelem(tabcol))
x = c;
else
x = xmax;
break;
case '\012': /* linefeed */
case '\013':
case '\014':
newline();
if (ttystate[cs->raw].nlcr)
x = 0;
break;
case '\015': /* carriage return */
x = 0;
if (ttystate[cs->raw].crnl)
newline();
break;
case '\016': /* SO: invoke G1 char set */
isgraphics = (isdigit(g1set));
break;
case '\017': /* SI: invoke G0 char set */
isgraphics = (isdigit(g0set));
break;
case '\020': /* DLE */
case '\021': /* DC1 */
case '\022': /* XON */
case '\023': /* DC3 */
case '\024': /* XOFF */
case '\025': /* NAK */
case '\026': /* SYN */
case '\027': /* ETB */
case '\030': /* CAN: cancel escape sequence, display checkerboard (not implemented) */
case '\031': /* EM */
case '\032': /* SUB: same as CAN */
goto Default;
;
/* ESC, \033, is handled below */
case '\034': /* FS */
case '\035': /* GS */
case '\036': /* RS */
case '\037': /* US */
break;
case '\177': /* delete: ignored */
break;
case '\033':
switch(dch = get_next_char()){
/*
* 1 - graphic processor option on (no-op; not installed)
*/
case '1':
break;
/*
* 2 - graphic processor option off (no-op; not installed)
*/
case '2':
break;
/*
* 7 - save cursor position.
*/
case '7':
//print("save\n");
savex = x;
savey = y;
saveattr = attr;
saveisgraphics = isgraphics;
break;
/*
* 8 - restore cursor position.
*/
case '8':
//print("restore\n");
x = savex;
y = savey;
attr = saveattr;
isgraphics = saveisgraphics;
break;
/*
* c - Reset terminal.
*/
case 'c':
print("resetterminal\n");
cursoron = 1;
ttystate[cs->raw].nlcr = 0;
break;
/*
* D - active position down a line, scroll if at bottom margin.
* (Original VT100 had a bug: tracked new-line/line-feed mode.)
*/
case 'D':
if(++y > yscrmax) {
y = yscrmax;
scroll(yscrmin+1, yscrmax+1, yscrmin, yscrmax);
}
break;
/*
* E - active position to start of next line, scroll if at bottom margin.
*/
case 'E':
x = 0;
if(++y > yscrmax) {
y = yscrmax;
scroll(yscrmin+1, yscrmax+1, yscrmin, yscrmax);
}
break;
/*
* H - set tab stop at current column.
* (This is cursor home in VT52 mode (not implemented).)
*/
case 'H':
if(x < nelem(tabcol))
tabcol[x] = 1;
break;
/*
* M - active position up a line, scroll if at top margin..
*/
case 'M':
if(--y < yscrmin) {
y = yscrmin;
scroll(yscrmin, yscrmax, yscrmin+1, yscrmin);
}
break;
/*
* Z - identification. the terminal
* emulator will return the response
* code for a generic VT100.
*/
case 'Z':
Ident:
sendnchars2(7, "\033[?1;2c"); /* VT100 with AVO option */
// sendnchars2(5, "\033[?6c"); /* VT102 (insert/delete-char, etc.) */
break;
/*
* < - enter ANSI mode
*/
case '<':
break;
/*
* > - set numeric keypad mode on (not implemented)
*/
case '>':
break;
/*
* = - set numeric keypad mode off (not implemented)
*/
case '=':
break;
/*
* # - Takes a one-digit argument
*/
case '#':
switch(get_next_char()){
case '3': /* Top half of double-height line */
case '4': /* Bottom half of double-height line */
case '5': /* Single-width single-height line */
case '6': /* Double-width line */
case '7': /* Screen print */
case '8': /* Fill screen with E's */
break;
}
break;
/*
* ( - switch G0 character set
*/
case '(':
g0set = get_next_char();
break;
/*
* - switch G1 character set
*/
case ')':
g1set = get_next_char();
break;
/*
* Received left bracket.
*/
case '[':
/*
* A semi-colon or ? delimits arguments.
*/
memset(operand, 0, sizeof(operand));
operand[0] = number(buf, &i);
noperand = 1;
while(buf[0] == ';' || buf[0] == '?'){
if(noperand < nelem(operand)){
noperand++;
operand[noperand-1] = number(buf, nil);
} else
number(buf, nil);
}
/*
* do escape2 stuff
*/
switch(dch = buf[0]){
/*
* c - same as ESC Z: what are you?
*/
case 'c':
goto Ident;
/*
* g - various tabstop manipulation
*/
case 'g':
switch(operand[0]){
case 0: /* clear tab at current column */
if(x < nelem(tabcol))
tabcol[x] = 0;
break;
case 3: /* clear all tabs */
memset(tabcol, 0, sizeof tabcol);
break;
}
break;
/*
* l - clear various options.
*/
case 'l':
if(noperand == 1){
switch(operand[0]){
case 20: /* set line feed mode */
ttystate[cs->raw].nlcr = 1;
break;
case 30: /* screen invisible (? not supported through VT220) */
break;
}
}else while(--noperand > 0){
switch(operand[noperand]){
case 1: /* set cursor keys to send ANSI functions: ESC [ A..D */
break;
case 2: /* set VT52 mode (not implemented) */
break;
case 3: /* set 80 columns */
setdim(-1, 80);
break;
case 4: /* set jump scrolling */
break;
case 5: /* set normal video on screen */
break;
case 6: /* set origin to absolute */
originrelative = 0;
x = y = 0;
break;
case 7: /* reset auto-wrap mode */
wraparound = 0;
break;
case 8: /* reset auto-repeat mode */
break;
case 9: /* reset interlacing mode */
break;
case 25: /* text cursor off (VT220) */
cursoron = 0;
break;
}
}
break;
/*
* s - some dec private stuff. actually [ ? num s, but we can't detect it.
*/
case 's':
break;
/*
* h - set various options.
*/
case 'h':
if(noperand == 1){
switch(operand[0]){
default:
break;
case 20: /* set newline mode */
ttystate[cs->raw].nlcr = 0;
break;
case 30: /* screen visible (? not supported through VT220) */
break;
}
}else while(--noperand > 0){
switch(operand[noperand]){
default:
break;
case 1: /* set cursor keys to send application function: ESC O A..D */
break;
case 2: /* set ANSI */
break;
case 3: /* set 132 columns */
setdim(-1, 132);
break;
case 4: /* set smooth scrolling */
break;
case 5: /* set screen to reverse video (not implemented) */
break;
case 6: /* set origin to relative */
originrelative = 1;
x = 0;
y = yscrmin;
break;
case 7: /* set auto-wrap mode */
wraparound = 1;
break;
case 8: /* set auto-repeat mode */
break;
case 9: /* set interlacing mode */
break;
case 25: /* text cursor on (VT220) */
cursoron = 1;
break;
}
}
break;
/*
* m - change character attrs.
*/
case 'm':
setattr(noperand, operand);
break;
/*
* n - request various reports
*/
case 'n':
switch(operand[0]){
case 5: /* status */
sendnchars2(4, "\033[0n"); /* terminal ok */
break;
case 6: /* cursor position */
sendnchars2(sprint(buf, "\033[%d;%dR",
originrelative ? y+1 - yscrmin : y+1, x+1), buf);
break;
}
break;
/*
* q - turn on list of LEDs; turn off others.
*/
case 'q':
break;
/*
* r - change scrolling region. operand[0] is
* min scrolling region and operand[1] is max
* scrolling region.
*/
case 'r':
yscrmin = 0;
yscrmax = ymax;
switch(noperand){
case 2:
yscrmax = operand[1]-1;
if(yscrmax > ymax)
yscrmax = ymax;
case 1:
yscrmin = operand[0]-1;
if(yscrmin < 0)
yscrmin = 0;
}
x = 0;
y = yscrmin;
break;
/*
* x - report terminal parameters
*/
case 'x':
sendnchars2(20, "\033[3;1;1;120;120;1;0x");
break;
/*
* y - invoke confidence test
*/
case 'y':
break;
/*
* A - cursor up.
*/
case 'e':
case 'A':
fixops(operand);
y -= operand[0];
if(y < yscrmin)
y = yscrmin;
olines -= operand[0];
if(olines < 0)
olines = 0;
break;
/*
* B - cursor down
*/
case 'B':
fixops(operand);
y += operand[0];
if(y > yscrmax)
y=yscrmax;
break;
/*
* C - cursor right
*/
case 'a':
case 'C':
fixops(operand);
x += operand[0];
/*
* VT-100-UG says not to go past the
* right margin.
*/
if(x > xmax)
x = xmax;
break;
/*
* D - cursor left
*/
case 'D':
fixops(operand);
x -= operand[0];
if(x < 0)
x = 0;
break;
/*
* G - cursor to column
*/
case '\'':
case 'G':
fixops(operand);
x = operand[0] - 1;
if(x > xmax)
x = xmax;
break;
/*
* H and f - cursor motion. operand[0] is row and
* operand[1] is column, origin 1.
*/
case 'H':
case 'f':
fixops(operand+1);
x = operand[1] - 1;
if(x > xmax)
x = xmax;
/* fallthrough */
/*
* d - cursor to line n (xterm)
*/
case 'd':
fixops(operand);
y = operand[0] - 1;
if(originrelative){
y += yscrmin;
if(y > yscrmax)
y = yscrmax;
}else{
if(y > ymax)
y = ymax;
}
break;
/*
* J - clear some or all of the display.
*/
case 'J':
switch (operand[0]) {
/*
* operand 2: whole screen.
*/
case 2:
clear(Rpt(pt(0, 0), pt(xmax+1, ymax+1)));
break;
/*
* operand 1: start of screen to active position, inclusive.
*/
case 1:
clear(Rpt(pt(0, 0), pt(xmax+1, y)));
clear(Rpt(pt(0, y), pt(x+1, y+1)));
break;
/*
* Default: active position to end of screen, inclusive.
*/
default:
clear(Rpt(pt(x, y), pt(xmax+1, y+1)));
clear(Rpt(pt(0, y+1), pt(xmax+1, ymax+1)));
break;
}
break;
/*
* K - clear some or all of the line.
*/
case 'K':
switch (operand[0]) {
/*
* operand 2: whole line.
*/
case 2:
clear(Rpt(pt(0, y), pt(xmax+1, y+1)));
break;
/*
* operand 1: start of line to active position, inclusive.
*/
case 1:
clear(Rpt(pt(0, y), pt(x+1, y+1)));
break;
/*
* Default: active position to end of line, inclusive.
*/
default:
clear(Rpt(pt(x, y), pt(xmax+1, y+1)));
break;
}
break;
/*
* P - delete character(s) from right of cursor (xterm)
*/
case 'P':
fixops(operand);
i = x + operand[0];
draw(screen, Rpt(pt(x, y), pt(xmax+1, y+1)), screen, nil, pt(i, y));
clear(Rpt(pt(xmax-operand[0], y), pt(xmax+1, y+1)));
break;
/*
* @ - insert blank(s) to right of cursor (xterm)
*/
case '@':
fixops(operand);
i = x + operand[0];
draw(screen, Rpt(pt(i, y), pt(xmax+1, y+1)), screen, nil, pt(x, y));
clear(Rpt(pt(x, y), pt(i, y+1)));
break;
/*
* X - erase character(s) at cursor and to the right (xterm)
*/
case 'X':
fixops(operand);
i = x + operand[0];
clear(Rpt(pt(x, y), pt(i, y+1)));
break;
/*
* L - insert a line at cursor position (VT102 and later)
*/
case 'L':
fixops(operand);
for(i = 0; i < operand[0]; ++i)
scroll(y, yscrmax, y+1, y);
break;
/*
* M - delete a line at cursor position (VT102 and later)
*/
case 'M':
fixops(operand);
for(i = 0; i < operand[0]; ++i)
scroll(y+1, yscrmax+1, y, yscrmax);
break;
/*
* S,T - scroll up/down (xterm)
*/
case 'T':
fixops(operand);
for(i = 0; i < operand[0]; ++i)
scroll(yscrmin, yscrmax, yscrmin+1, yscrmin);
break;
case 'S':
fixops(operand);
for(i = 0; i < operand[0]; ++i)
scroll(yscrmin+1, yscrmax+1, yscrmin, yscrmin);
break;
case '=': /* ? not supported through VT220 */
number(buf, nil);
switch(buf[0]) {
case 'h':
case 'l':
break;
}
break;
/*
* Anything else we ignore for now...
*/
default:
print("unknown escape2 '%c' (0x%x)\n", dch, dch);
break;
}
break;
/*
* Collapse multiple '\033' to one.
*/
case '\033':
peekc = '\033';
break;
/* set title */
case ']': /* it's actually <esc> ] num ; title <bel> */
{
int ch, fd;
number(buf, nil);
i = 0;
while((ch = get_next_char()) != '\a')
if(i < sizeof buf)
buf[i++] = ch;
fd = open("/dev/label", OWRITE);
write(fd, buf, i);
close(fd);
}
break;
/*
* Ignore other commands.
*/
default:
print("unknown command '%c' (0x%x)\n", dch, dch);
break;
}
break;
default: /* ordinary char */
Default:
if(isgraphics && gmap[(uint8_t) buf[0]])
buf[0] = gmap[(uint8_t) buf[0]];
/* line wrap */
if (x > xmax){
if(wraparound){
x = 0;
newline();
}else{
continue;
}
}
n = 1;
c = 0;
while (!cs->raw && host_avail() && x+n<=xmax && n<BUFS
&& (c = get_next_char())>=' ' && c<'\177') {
buf[n++] = c;
c = 0;
}
buf[n] = 0;
// clear(Rpt(pt(x,y), pt(x+n, y+1)));
drawstring(pt(x, y), buf, attr);
x += n;
peekc = c;
break;
}
}
}
void
emulate(void)
{
char buf[BUFS+1];
int n;
int c;
int standout = 0;
int insmode = 0;
for (;;) {
if (x > xmax || y > ymax) {
x = 0;
newline();
}
buf[0] = get_next_char();
buf[1] = '\0';
switch(buf[0]) {
case '\000': /* nulls, just ignore 'em */
break;
case '\007': /* bell */
ringbell();
break;
case '\t': /* tab modulo 8 */
x = (x|7)+1;
break;
case '\033':
switch(get_next_char()) {
case 'j':
get_next_char();
break;
case '&': /* position cursor &c */
switch(get_next_char()) {
case 'a':
for (;;) {
n = number(buf, nil);
switch(buf[0]) {
case 'r':
case 'y':
y = n;
continue;
case 'c':
x = n;
continue;
case 'R':
case 'Y':
y = n;
break;
case 'C':
x = n;
break;
}
break;
}
break;
case 'd': /* underline stuff */
if ((n=get_next_char())>='A' && n <= 'O')
standout++;
else if (n == '@')
standout = 0;
break;
default:
get_next_char();
break;
}
break;
case 'i': /* back tab */
if (x>0)
x = (x-1) & ~07;
break;
case 'H': /* home cursor */
case 'h':
x = 0;
y = 0;
break;
case 'L': /* insert blank line */
scroll(y, ymax, y+1, y);
break;
case 'M': /* delete line */
scroll(y+1, ymax+1, y, ymax);
break;
case 'J': /* clear to end of display */
xtipple(Rpt(pt(0, y+1),
pt(xmax+1, ymax+1)));
/* flow */
case 'K': /* clear to EOL */
xtipple(Rpt(pt(x, y),
pt(xmax+1, y+1)));
break;
case 'P': /* delete char */
bitblt(&screen, pt(x, y),
&screen, Rpt(pt(x+1, y),
pt(xmax+1, y+1)),
S);
xtipple(Rpt(pt(xmax, y),
pt(xmax+1, y+1)));
break;
case 'Q': /* enter insert mode */
insmode++;
break;
case 'R': /* leave insert mode */
insmode = 0;
break;
case 'S': /* roll up */
scroll(1, ymax+1, 0, ymax);
break;
case 'T':
scroll(0, ymax, 1, 0);
break;
case 'A': /* upline */
case 't':
if (y>0)
y--;
if (olines > 0)
olines--;
break;
case 'B':
case 'w':
y++; /* downline */
break;
case 'C': /* right */
case 'v':
x++;
break;
case 'D': /* left */
case 'u':
x--;
}
break;
case '\b': /* backspace */
if(x > 0)
--x;
break;
case '\n': /* linefeed */
newline();
standout = 0;
if( ttystate[cs->raw].nlcr )
x = 0;
break;
case '\r': /* carriage return */
x = 0;
standout = 0;
if( ttystate[cs->raw].crnl )
newline();
break;
default: /* ordinary char */
n = 1;
c = 0;
while (!cs->raw && host_avail() && x+n<=xmax && n<BUFS
&& (c = get_next_char())>=' ' && c<'\177') {
buf[n++] = c;
c = 0;
}
buf[n] = 0;
if (insmode) {
bitblt(&screen, pt(x+n, y), &screen,
Rpt(pt(x, y), pt(xmax-n+1, y+1)), S);
}
xtipple(Rpt(pt(x,y), pt(x+n, y+1)));
string(&screen, pt(x, y), font, buf, DxorS);
if (standout)
rectf(&screen,
Rpt(pt(x,y),pt(x+n,y+1)),
DxorS);
x += n;
peekc = c;
break;
}
}
}
main()
{
float ship[XY];
long org[XY];
long size[XY];
Device dev;
short val;
Device mdev[XY];
short mval[XY];
long nhits;
short buffer[BUFSIZE];
Boolean run;
prefsize(400, 400);
winopen("select1");
getorigin(&org[X], &org[Y]);
getsize(&size[X], &size[Y]);
mmode(MVIEWING);
ortho2(-0.5, size[X] - 0.5, -0.5, size[Y] - 0.5);
qdevice(LEFTMOUSE);
qdevice(ESCKEY);
color(BLACK);
clear();
mdev[X] = MOUSEX;
mdev[Y] = MOUSEY;
drawplanet();
run = TRUE;
while (run) {
dev = qread(&val);
if (val == 0) { /* on upstroke */
switch (dev) {
case LEFTMOUSE:
getdev(XY, mdev, mval);
ship[X] = mval[X] - org[X];
ship[Y] = mval[Y] - org[Y];
color(BLUE);
sbox(ship[X], ship[Y],
ship[X] + SHIPWIDTH, ship[Y] + SHIPHEIGHT);
/*
* specify the selecting region to be a box surrounding the
* rocket ship
*/
ortho2(ship[X], ship[X] + SHIPWIDTH,
ship[Y], ship[Y] + SHIPHEIGHT);
initnames();
gselect(buffer, BUFSIZE);
loadname(PLANET);
/* no actual drawing takes place */
drawplanet();
nhits = endselect(buffer);
/*
* restore the Projection matrix; NB. can't use push/popmatrix
* since they only work for the ModelView matrix stack
* when in MVIEWING mode
*/
ortho2(-0.5, size[X] - 0.5, -0.5, size[Y] - 0.5);
/*
* check to see if PLANET was selected; NB. nhits is NOT the
* number of buffer elements written
*/
if (nhits < 0) {
fprintf(stderr, "gselect buffer overflow\n");
run = FALSE;
}
else if (nhits >= 1 && buffer[0] == 1 && buffer[1] == PLANET)
ringbell();
break;
case ESCKEY:
run = FALSE;
break;
}
}
}
gexit();
return 0;
}
