4.4BSD/usr/src/usr.bin/ex/ex_put.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[] = "@(#)ex_put.c 8.1 (Berkeley) 6/9/93";
#endif /* not lint */
#include "ex.h"
#include "ex_tty.h"
#include "ex_vis.h"
/*
* Terminal driving and line formatting routines.
* Basic motion optimizations are done here as well
* as formatting of lines (printing of control characters,
* line numbering and the like).
*/
/*
* The routines outchar, putchar and pline are actually
* variables, and these variables point at the current definitions
* of the routines. See the routine setflav.
* We sometimes make outchar be routines which catch the characters
* to be printed, e.g. if we want to see how long a line is.
* During open/visual, outchar and putchar will be set to
* routines in the file ex_vput.c (vputchar, vinschar, etc.).
*/
int (*Outchar)() = termchar;
int (*Put_char)() = normchar;
int (*Pline)() = normline;
int (*
setlist(t))()
bool t;
{
register int (*P)();
listf = t;
P = Put_char;
Put_char = t ? listchar : normchar;
return (P);
}
int (*
setnumb(t))()
bool t;
{
register int (*P)();
numberf = t;
P = Pline;
Pline = t ? numbline : normline;
return (P);
}
/*
* Format c for list mode; leave things in common
* with normal print mode to be done by normchar.
*/
listchar(c)
register short c;
{
c &= (TRIM|QUOTE);
switch (c) {
case '\t':
case '\b':
outchar('^');
c = ctlof(c);
break;
case '\n':
break;
case '\n' | QUOTE:
outchar('$');
break;
default:
if (c & QUOTE)
break;
if (c < ' ' && c != '\n' || c == DELETE)
outchar('^'), c = ctlof(c);
break;
}
normchar(c);
}
/*
* Format c for printing. Handle funnies of upper case terminals
* and crocky hazeltines which don't have ~.
*/
normchar(c)
register short c;
{
register char *colp;
c &= (TRIM|QUOTE);
if (c == '~' && HZ) {
normchar('\\');
c = '^';
}
if (c & QUOTE)
switch (c) {
case ' ' | QUOTE:
case '\b' | QUOTE:
break;
case QUOTE:
return;
default:
c &= TRIM;
}
else if (c < ' ' && (c != '\b' || !OS) && c != '\n' && c != '\t' || c == DELETE)
ex_putchar('^'), c = ctlof(c);
else if (UPPERCASE)
if (isupper(c)) {
outchar('\\');
c = tolower(c);
} else {
colp = "({)}!|^~'`";
while (*colp++)
if (c == *colp++) {
outchar('\\');
c = colp[-2];
break;
}
}
outchar(c);
}
/*
* Print a line with a number.
*/
numbline(i)
int i;
{
if (shudclob)
slobber(' ');
ex_printf("%6d ", i);
normline();
}
/*
* Normal line output, no numbering.
*/
normline()
{
register char *cp;
if (shudclob)
slobber(linebuf[0]);
/* pdp-11 doprnt is not reentrant so can't use "printf" here
in case we are tracing */
for (cp = linebuf; *cp;)
ex_putchar(*cp++);
if (!inopen)
ex_putchar('\n' | QUOTE);
}
/*
* Given c at the beginning of a line, determine whether
* the printing of the line will erase or otherwise obliterate
* the prompt which was printed before. If it won't, do it now.
*/
slobber(c)
int c;
{
shudclob = 0;
switch (c) {
case '\t':
if (Put_char == listchar)
return;
break;
default:
return;
case ' ':
case 0:
break;
}
if (OS)
return;
flush();
putch(' ');
if (BC)
tputs(BC, 0, putch);
else
putch('\b');
}
/*
* The output buffer is initialized with a useful error
* message so we don't have to keep it in data space.
*/
static char linb[66];
char *linp = linb;
/*
* Phadnl records when we have already had a complete line ending with \n.
* If another line starts without a flush, and the terminal suggests it,
* we switch into -nl mode so that we can send lineffeeds to avoid
* a lot of spacing.
*/
static bool phadnl;
/*
* Indirect to current definition of putchar.
*/
ex_putchar(c)
int c;
{
(*Put_char)(c);
}
/*
* Termchar routine for command mode.
* Watch for possible switching to -nl mode.
* Otherwise flush into next level of buffering when
* small buffer fills or at a newline.
*/
termchar(c)
int c;
{
if (pfast == 0 && phadnl)
pstart();
if (c == '\n')
phadnl = 1;
else if (linp >= &linb[63])
flush1();
*linp++ = c;
if (linp >= &linb[63]) {
fgoto();
flush1();
}
}
flush()
{
flush1();
flush2();
}
/*
* Flush from small line buffer into output buffer.
* Work here is destroying motion into positions, and then
* letting fgoto do the optimized motion.
*/
flush1()
{
register char *lp;
register short c;
*linp = 0;
lp = linb;
while (*lp)
switch (c = *lp++) {
case '\r':
destline += destcol / COLUMNS;
destcol = 0;
continue;
case '\b':
if (destcol)
destcol--;
continue;
case ' ':
destcol++;
continue;
case '\t':
destcol += value(TABSTOP) - destcol % value(TABSTOP);
continue;
case '\n':
destline += destcol / COLUMNS + 1;
if (destcol != 0 && destcol % COLUMNS == 0)
destline--;
destcol = 0;
continue;
default:
fgoto();
for (;;) {
if (AM == 0 && outcol == COLUMNS)
fgoto();
c &= TRIM;
putch(c);
if (c == '\b') {
outcol--;
destcol--;
} else if (c >= ' ' && c != DELETE) {
outcol++;
destcol++;
if (XN && outcol % COLUMNS == 0)
putch('\r'), putch('\n');
}
c = *lp++;
if (c <= ' ')
break;
}
--lp;
continue;
}
linp = linb;
}
flush2()
{
fgoto();
flusho();
pstop();
}
/*
* Sync the position of the output cursor.
* Most work here is rounding for terminal boundaries getting the
* column position implied by wraparound or the lack thereof and
* rolling up the screen to get destline on the screen.
*/
fgoto()
{
register int l, c;
if (destcol > COLUMNS - 1) {
destline += destcol / COLUMNS;
destcol %= COLUMNS;
}
if (outcol > COLUMNS - 1) {
l = (outcol + 1) / COLUMNS;
outline += l;
outcol %= COLUMNS;
if (AM == 0) {
while (l > 0) {
if (pfast)
if (xCR)
tputs(xCR, 0, putch);
else
putch('\r');
if (xNL)
tputs(xNL, 0, putch);
else
putch('\n');
l--;
}
outcol = 0;
}
if (outline > LINES - 1) {
destline -= outline - (LINES - 1);
outline = LINES - 1;
}
}
if (destline > LINES - 1) {
l = destline;
destline = LINES - 1;
if (outline < LINES - 1) {
c = destcol;
if (pfast == 0 && (!CA || holdcm))
destcol = 0;
fgoto();
destcol = c;
}
while (l > LINES - 1) {
/*
* The following linefeed (or simulation thereof)
* is supposed to scroll up the screen, since we
* are on the bottom line. We make the assumption
* that linefeed will scroll. If ns is in the
* capability list this won't work. We should
* probably have an sc capability but sf will
* generally take the place if it works.
*
* Superbee glitch: in the middle of the screen we
* have to use esc B (down) because linefeed screws up
* in "Efficient Paging" (what a joke) mode (which is
* essential in some SB's because CRLF mode puts garbage
* in at end of memory), but you must use linefeed to
* scroll since down arrow won't go past memory end.
* I turned this off after recieving Paul Eggert's
* Superbee description which wins better.
*/
if (xNL /* && !XB */ && pfast)
tputs(xNL, 0, putch);
else
putch('\n');
l--;
if (pfast == 0)
outcol = 0;
}
}
if (destline < outline && !(CA && !holdcm || UP != NOSTR))
destline = outline;
if (CA && !holdcm)
if (plod(costCM) > 0)
plod(0);
else
tputs(tgoto(CM, destcol, destline), 0, putch);
else
plod(0);
outline = destline;
outcol = destcol;
}
/*
* Tab to column col by flushing and then setting destcol.
* Used by "set all".
*/
tab(col)
int col;
{
flush1();
destcol = col;
}
/*
* Move (slowly) to destination.
* Hard thing here is using home cursor on really deficient terminals.
* Otherwise just use cursor motions, hacking use of tabs and overtabbing
* and backspace.
*/
static int plodcnt, plodflg;
plodput(c)
{
if (plodflg)
plodcnt--;
else
putch(c);
}
plod(cnt)
{
register int i, j, k;
register int soutcol, soutline;
plodcnt = plodflg = cnt;
soutcol = outcol;
soutline = outline;
/*
* Consider homing and moving down/right from there, vs moving
* directly with local motions to the right spot.
*/
if (HO) {
/*
* i is the cost to home and tab/space to the right to
* get to the proper column. This assumes ND space costs
* 1 char. So i+destcol is cost of motion with home.
*/
if (GT)
i = (destcol / value(HARDTABS)) + (destcol % value(HARDTABS));
else
i = destcol;
/*
* j is cost to move locally without homing
*/
if (destcol >= outcol) { /* if motion is to the right */
j = destcol / value(HARDTABS) - outcol / value(HARDTABS);
if (GT && j)
j += destcol % value(HARDTABS);
else
j = destcol - outcol;
} else
/* leftward motion only works if we can backspace. */
if (outcol - destcol <= i && (BS || BC))
i = j = outcol - destcol; /* cheaper to backspace */
else
j = i + 1; /* impossibly expensive */
/* k is the absolute value of vertical distance */
k = outline - destline;
if (k < 0)
k = -k;
j += k;
/*
* Decision. We may not have a choice if no UP.
*/
if (i + destline < j || (!UP && destline < outline)) {
/*
* Cheaper to home. Do it now and pretend it's a
* regular local motion.
*/
tputs(HO, 0, plodput);
outcol = outline = 0;
} else if (LL) {
/*
* Quickly consider homing down and moving from there.
* Assume cost of LL is 2.
*/
k = (LINES - 1) - destline;
if (i + k + 2 < j && (k<=0 || UP)) {
tputs(LL, 0, plodput);
outcol = 0;
outline = LINES - 1;
}
}
} else
/*
* No home and no up means it's impossible, so we return an
* incredibly big number to make cursor motion win out.
*/
if (!UP && destline < outline)
return (500);
if (GT)
i = destcol % value(HARDTABS)
+ destcol / value(HARDTABS);
else
i = destcol;
/*
if (BT && outcol > destcol && (j = (((outcol+7) & ~7) - destcol - 1) >> 3)) {
j *= (k = strlen(BT));
if ((k += (destcol&7)) > 4)
j += 8 - (destcol&7);
else
j += k;
} else
*/
j = outcol - destcol;
/*
* If we will later need a \n which will turn into a \r\n by
* the system or the terminal, then don't bother to try to \r.
*/
if ((NONL || !pfast) && outline < destline)
goto dontcr;
/*
* If the terminal will do a \r\n and there isn't room for it,
* then we can't afford a \r.
*/
if (NC && outline >= destline)
goto dontcr;
/*
* If it will be cheaper, or if we can't back up, then send
* a return preliminarily.
*/
if (j > i + 1 || outcol > destcol && !BS && !BC) {
/*
* BUG: this doesn't take the (possibly long) length
* of xCR into account.
*/
if (xCR)
tputs(xCR, 0, plodput);
else
plodput('\r');
if (NC) {
if (xNL)
tputs(xNL, 0, plodput);
else
plodput('\n');
outline++;
}
outcol = 0;
}
dontcr:
/* Move down, if necessary, until we are at the desired line */
while (outline < destline) {
j = destline - outline;
if (j > costDP && DOWN_PARM) {
/* Win big on Tek 4025 */
tputs(tgoto(DOWN_PARM, 0, j), j, plodput);
outline += j;
}
else {
outline++;
if (xNL && pfast)
tputs(xNL, 0, plodput);
else
plodput('\n');
}
if (plodcnt < 0)
goto out;
if (NONL || pfast == 0)
outcol = 0;
}
if (BT)
k = strlen(BT); /* should probably be cost(BT) and moved out */
/* Move left, if necessary, to desired column */
while (outcol > destcol) {
if (plodcnt < 0)
goto out;
if (BT && !insmode && outcol - destcol > 4+k) {
tputs(BT, 0, plodput);
outcol--;
outcol -= outcol % value(HARDTABS); /* outcol &= ~7; */
continue;
}
j = outcol - destcol;
if (j > costLP && LEFT_PARM) {
tputs(tgoto(LEFT_PARM, 0, j), j, plodput);
outcol -= j;
}
else {
outcol--;
if (BC)
tputs(BC, 0, plodput);
else
plodput('\b');
}
}
/* Move up, if necessary, to desired row */
while (outline > destline) {
j = outline - destline;
if (UP_PARM && j > 1) {
/* Win big on Tek 4025 */
tputs(tgoto(UP_PARM, 0, j), j, plodput);
outline -= j;
}
else {
outline--;
tputs(UP, 0, plodput);
}
if (plodcnt < 0)
goto out;
}
/*
* Now move to the right, if necessary. We first tab to
* as close as we can get.
*/
if (GT && !insmode && destcol - outcol > 1) {
/* tab to right as far as possible without passing col */
for (;;) {
i = tabcol(outcol, value(HARDTABS));
if (i > destcol)
break;
if (TA)
tputs(TA, 0, plodput);
else
plodput('\t');
outcol = i;
}
/* consider another tab and then some backspaces */
if (destcol - outcol > 4 && i < COLUMNS && (BC || BS)) {
if (TA)
tputs(TA, 0, plodput);
else
plodput('\t');
outcol = i;
/*
* Back up. Don't worry about LEFT_PARM because
* it's never more than 4 spaces anyway.
*/
while (outcol > destcol) {
outcol--;
if (BC)
tputs(BC, 0, plodput);
else
plodput('\b');
}
}
}
/*
* We've tabbed as much as possible. If we still need to go
* further (not exact or can't tab) space over. This is a
* very common case when moving to the right with space.
*/
while (outcol < destcol) {
j = destcol - outcol;
if (j > costRP && RIGHT_PARM) {
/*
* This probably happens rarely, if at all.
* It seems mainly useful for ANSI terminals
* with no hardware tabs, and I don't know
* of any such terminal at the moment.
*/
tputs(tgoto(RIGHT_PARM, 0, j), j, plodput);
outcol += j;
}
else {
/*
* move one char to the right. We don't use ND space
* because it's better to just print the char we are
* moving over. There are various exceptions, however.
* If !inopen, vtube contains garbage. If the char is
* a null or a tab we want to print a space. Other
* random chars we use space for instead, too.
*/
if (!inopen || vtube[outline]==NULL ||
(i=vtube[outline][outcol]) < ' ')
i = ' ';
if(i & QUOTE) /* mjm: no sign extension on 3B */
i = ' ';
if (insmode && ND)
tputs(ND, 0, plodput);
else
plodput(i);
outcol++;
}
if (plodcnt < 0)
goto out;
}
out:
if (plodflg) {
outcol = soutcol;
outline = soutline;
}
return(plodcnt);
}
/*
* An input line arrived.
* Calculate new (approximate) screen line position.
* Approximate because kill character echoes newline with
* no feedback and also because of long input lines.
*/
noteinp()
{
outline++;
if (outline > LINES - 1)
outline = LINES - 1;
destline = outline;
destcol = outcol = 0;
}
/*
* Something weird just happened and we
* lost track of whats happening out there.
* Since we cant, in general, read where we are
* we just reset to some known state.
* On cursor addressible terminals setting to unknown
* will force a cursor address soon.
*/
termreset()
{
endim();
if (TI) /* otherwise it flushes anyway, and 'set tty=dumb' vomits */
putpad(TI); /*adb change -- emit terminal initial sequence */
destcol = 0;
destline = LINES - 1;
if (CA) {
outcol = UKCOL;
outline = UKCOL;
} else {
outcol = destcol;
outline = destline;
}
}
/*
* Low level buffering, with the ability to drain
* buffered output without printing it.
*/
char *obp = obuf;
draino()
{
obp = obuf;
}
flusho()
{
if (obp != obuf) {
#ifndef vms
write(1, obuf, obp - obuf);
#else
vms_write(1, obuf, obp - obuf);
#endif
obp = obuf;
}
}
putnl()
{
ex_putchar('\n');
}
ex_putS(cp)
char *cp;
{
if (cp == NULL)
return;
while (*cp)
putch(*cp++);
}
putch(c)
int c;
{
#ifdef OLD3BTTY /* mjm */
if(c == '\n') /* mjm: Fake "\n\r" for '\n' til fix in 3B firmware */
putch('\r'); /* mjm: vi does "stty -icanon" => -onlcr !! */
#endif
*obp++ = c & 0177;
if (obp >= &obuf[sizeof obuf])
flusho();
}
/*
* Miscellaneous routines related to output.
*/
/*
* Put with padding
*/
putpad(cp)
char *cp;
{
flush();
tputs(cp, 0, putch);
}
/*
* Set output through normal command mode routine.
*/
setoutt()
{
Outchar = termchar;
}
/*
* Printf (temporarily) in list mode.
*/
/*VARARGS1*/
lprintf(cp, dp)
char *cp, *dp;
{
register int (*P)();
P = setlist(1);
ex_printf(cp, dp);
Put_char = P;
}
/*
* Newline + flush.
*/
putNFL()
{
putnl();
flush();
}
/*
* Try to start -nl mode.
*/
pstart()
{
if (NONL)
return;
if (!value(OPTIMIZE))
return;
if (ruptible == 0 || pfast)
return;
fgoto();
flusho();
pfast = 1;
normtty++;
#ifndef USG3TTY
tty.sg_flags = normf & ~(ECHO|XTABS|CRMOD);
#else
tty = normf;
tty.c_oflag &= ~(ONLCR|TAB3);
tty.c_lflag &= ~ECHO;
#endif
ex_sTTY(1);
}
/*
* Stop -nl mode.
*/
pstop()
{
if (inopen)
return;
phadnl = 0;
linp = linb;
draino();
normal(normf);
pfast &= ~1;
}
/*
* Prep tty for open mode.
*/
ttymode
ostart()
{
ttymode f;
if (!intty)
error("Open and visual must be used interactively");
ex_gTTY(1);
normtty++;
#ifndef USG3TTY
f = tty.sg_flags;
tty.sg_flags = (normf &~ (ECHO|XTABS|CRMOD)) |
# ifdef CBREAK
CBREAK;
# else
RAW;
# endif
# ifdef TIOCGETC
ttcharoff();
# endif
#else
f = tty;
tty = normf;
tty.c_iflag &= ~ICRNL;
tty.c_lflag &= ~(ECHO|ICANON);
tty.c_oflag &= ~(TAB3|ONLCR);
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 1;
ttcharoff();
#endif
ex_sTTY(1);
tostart();
pfast |= 2;
return (f);
}
/* actions associated with putting the terminal in open mode */
tostart()
{
putpad(VS);
putpad(KS);
if (!value(MESG)) {
if (ttynbuf[0] == 0) {
register char *tn;
if ((tn=ttyname(2)) == NULL &&
(tn=ttyname(1)) == NULL &&
(tn=ttyname(0)) == NULL)
ttynbuf[0] = 1;
else
strcpy(ttynbuf, tn);
}
if (ttynbuf[0] != 1) {
struct stat sbuf;
stat(ttynbuf, &sbuf);
ttymesg = sbuf.st_mode & 0777;
chmod(ttynbuf,
#ifdef UCBV7
/*
* This applies to the UCB V7 Pdp-11 system with the
* -u write option only.
*/
0611 /* 11 = urgent only allowed */
#else
0600
#endif
);
}
}
}
/*
* Turn off start/stop chars if they aren't the default ^S/^Q.
* This is so idiots who make esc their start/stop don't lose.
* We always turn off quit since datamedias send ^\ for their
* right arrow key.
*/
#ifdef TIOCGETC
ttcharoff()
{
nttyc.t_quitc = '\377';
if (nttyc.t_startc != CTRL('q'))
nttyc.t_startc = '\377';
if (nttyc.t_stopc != CTRL('s'))
nttyc.t_stopc = '\377';
# ifdef TIOCLGET
nlttyc.t_suspc = '\377'; /* ^Z */
nlttyc.t_dsuspc = '\377'; /* ^Y */
nlttyc.t_flushc = '\377'; /* ^O */
nlttyc.t_lnextc = '\377'; /* ^V */
# endif
}
#endif
#ifdef USG3TTY
ttcharoff()
{
tty.c_cc[VQUIT] = '\377';
# ifdef VSTART
/*
* The following is sample code if USG ever lets people change
* their start/stop chars. As long as they can't we can't get
* into trouble so we just leave them alone.
*/
if (tty.c_cc[VSTART] != CTRL('q'))
tty.c_cc[VSTART] = '\377';
if (tty.c_cc[VSTOP] != CTRL('s'))
tty.c_cc[VSTOP] = '\377';
# endif
}
#endif
/*
* Stop open, restoring tty modes.
*/
ostop(f)
ttymode f;
{
#ifndef USG3TTY
pfast = (f & CRMOD) == 0;
#else
pfast = (f.c_oflag & ONLCR) == 0;
#endif
termreset(), fgoto(), flusho();
normal(f);
tostop();
}
/* Actions associated with putting the terminal in the right mode. */
tostop()
{
putpad(VE);
putpad(KE);
if (!value(MESG) && ttynbuf[0]>1)
chmod(ttynbuf, ttymesg);
}
#ifndef CBREAK
/*
* Into cooked mode for interruptibility.
*/
vcook()
{
tty.sg_flags &= ~RAW;
ex_sTTY(1);
}
/*
* Back into raw mode.
*/
vraw()
{
tty.sg_flags |= RAW;
ex_sTTY(1);
}
#endif
/*
* Restore flags to normal state f.
*/
normal(f)
ttymode f;
{
if (normtty > 0) {
ignore(setty(f));
normtty--;
}
}
/*
* Straight set of flags to state f.
*/
ttymode
setty(f)
ttymode f;
{
#ifndef USG3TTY
register int ot = tty.sg_flags;
#else
ttymode ot;
ot = tty;
#endif
#ifndef USG3TTY
# ifdef TIOCGETC
if (f == normf) {
nttyc = ottyc;
# ifdef TIOCLGET
nlttyc = olttyc;
# endif
} else
ttcharoff();
# endif
tty.sg_flags = f;
#else
if (tty.c_lflag & ICANON)
ttcharoff();
tty = f;
#endif
ex_sTTY(1);
return (ot);
}
ex_gTTY(i)
int i;
{
#ifndef USG3TTY
ignore(ioctl(i, TIOCGETP, &tty));
# ifdef TIOCGETC
ioctl(i, TIOCGETC, (char *) &ottyc);
nttyc = ottyc;
# endif
# ifdef TIOCGLTC
ioctl(i, TIOCGLTC, (char *) &olttyc);
nlttyc = olttyc;
# endif
#else
ioctl(i, TCGETA, (char *) &tty);
#endif
}
/*
* ex_sTTY: set the tty modes on file descriptor i to be what's
* currently in global "tty". (Also use nttyc if needed.)
*/
ex_sTTY(i)
int i;
{
#ifndef USG3TTY
# ifdef USG
/* Bug in USG tty driver, put out a DEL as a patch. */
if (tty.sg_ospeed >= B1200)
write(1, "\377", 1);
# endif
# ifdef TIOCSETN
/* Don't flush typeahead if we don't have to */
ioctl(i, TIOCSETN, (char *) &tty);
# else
/* We have to. Too bad. */
stty(i, &tty);
# endif
# ifdef TIOCGETC
/* Update the other random chars while we're at it. */
ioctl(i, TIOCSETC, (char *) &nttyc);
# endif
# ifdef TIOCSLTC
ioctl(i, TIOCSLTC, (char *) &nlttyc);
# endif
#else
/* USG 3 very simple: just set everything */
ioctl(i, TCSETAW, (char *) &tty);
#endif
}
/*
* Print newline, or blank if in open/visual
*/
noonl()
{
ex_putchar(Outchar != termchar ? ' ' : '\n');
}