2BSD/src/ex/ex_put.c
/* Copyright (c) 1979 Regents of the University of California */
#include "ex.h"
#include "ex_tty.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 (*Putchar)() = normchar;
int (*Pline)() = normline;
int (*
setlist(t))()
bool t;
{
register int (*P)();
listf = t;
P = Putchar;
Putchar = 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)
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(' ');
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;)
putchar(*cp++);
if (!inopen)
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 (Putchar == 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] = {
'E', 'r', 'r', 'o', 'r', ' ', 'm', 'e', 's', 's', 'a', 'g', 'e', ' ',
'f', 'i', 'l', 'e', ' ', 'n', 'o', 't', ' ',
'a', 'v', 'a', 'i', 'l', 'a', 'b', 'l', 'e', '\n', 0
};
static char *linp = linb + 33;
/*
* 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.
*/
putchar(c)
int c;
{
(*Putchar)(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('\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)
putch('\r');
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) {
putch('\n');
l--;
if (pfast == 0)
outcol = 0;
}
}
if (destline < outline && !(CA && !holdcm || UP != NOSTR))
destline = outline;
if (motion())
return;
if (CA && !holdcm) {
tputs(cgoto(), 0, putch);
outline = destline;
outcol = destcol;
} else
plod();
}
/*
* Tab to column col by flushing and then setting destcol.
* Used by "set all".
*/
tab(col)
int col;
{
flush1();
destcol = col;
}
/*
* Routine to decide how to do a basic motion,
* choosing between local motions and cursor addressing.
*/
motion()
{
register int v, h;
/*
* V is vertical distance, then cost with cr.
* H is horizontal distance, then direct move cost.
*/
if (!BS)
return (0);
v = destline - outline;
if (v < 0)
if (CA && !holdcm || UP) {
if (!UP)
return (0);
v = -v;
} else
destline = outline;
h = destcol;
if (!v || pfast) {
h -= outcol;
if (h < 0)
h = -h;
}
h += v;
if (pfast || !NONL) {
if (outcol)
v++;
v += destcol;
} else
v = 5;
if (v >= 4 && h >= 4)
return (0);
plod();
return (1);
}
/*
* 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.
*/
plod()
{
register int i, j, k;
if (HO && (!CA || holdcm)) {
if (GT)
i = (destcol >> 3) + (destcol & 07);
else
i = destcol;
if (destcol >= outcol)
if (GT && (j = ((destcol - (outcol &~ 07)) >> 3)))
j += destcol & 07;
else
j = destcol - outcol;
else
if (outcol - destcol <= i && (BS || BC))
i = j = outcol - destcol;
else
j = i + 1;
k = outline - destline;
if (k < 0)
k = -k;
j += k;
if (i + destline < j) {
tputs(HO, 0, putch);
outcol = outline = 0;
} else if (LL) {
k = (LINES - 1) - destline;
if (i + k + 2 < j) {
tputs(LL, 0, putch);
outcol = 0;
outline = LINES - 1;
}
}
}
if (GT && (!CA || holdcm))
i = (destcol >> 3) + (destcol & 07);
else
i = destcol;
if ((!NONL || outline >= destline) && (!NC || outline < destline) &&
(outcol - destcol > i + 1 || outcol > destcol && !BS && !BC)) {
putch('\r');
if (NC) {
putch('\n');
outline++;
}
outcol = 0;
}
while (outline < destline) {
outline++;
putch('\n');
if (NONL || pfast == 0)
outcol = 0;
}
while (outcol > destcol) {
outcol--;
if (BC)
tputs(BC, 0, putch);
else
putch('\b');
}
while (outline > destline) {
outline--;
putS(UP);
}
if (GT && destcol - outcol > 1) {
while ((i = ((outcol + 8) &~ 7)) <= destcol) {
if (TA)
tputs(TA, 0, putch);
else
putch('\t');
outcol = i;
}
if (destcol - outcol > 4 && (BC || BS)) {
if (TA)
tputs(TA, 0, putch);
else
putch('\t');
outcol = i;
while (outcol > destcol) {
outcol--;
if (BC)
tputs(BC, 0, putch);
else
putch('\b');
}
}
}
while (outcol < destcol) {
if (inopen && ND)
putS(ND);
else
putch(' ');
outcol++;
}
}
/*
* 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();
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) {
write(1, obuf, obp - obuf);
obp = obuf;
}
}
putnl()
{
putchar('\n');
}
putS(cp)
char *cp;
{
if (cp == NULL)
return;
while (*cp)
putch(*cp++);
}
putch(c)
int c;
{
*obp++ = c;
if (obp >= &obuf[sizeof obuf])
flusho();
}
/*
* Miscellaneous routines related to output.
*/
/*
* Cursor motion.
*/
char *
cgoto()
{
return (tgoto(CM, destcol, destline));
}
/*
* 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.
*/
/*VARARGS2*/
lprintf(cp, dp)
char *cp, *dp;
{
register int (*P)();
P = setlist(1);
printf(cp, dp);
Putchar = 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++;
tty.sg_flags = normf & ~(ECHO|CRMOD);
sTTY(1);
}
/*
* Stop -nl mode.
*/
pstop()
{
if (inopen)
return;
phadnl = 0;
linp = linb;
draino();
normal(normf);
pfast &= ~1;
}
/*
* Prep tty for open mode.
*/
ostart()
{
int f;
if (!intty)
error("Open and visual must be used interactively");
gTTY(1);
normtty++;
f = tty.sg_flags;
#ifdef V6
tty.sg_flags = (normf &~ (ECHO|CRMOD)) | RAW;
#else
tty.sg_flags = (normf &~ (ECHO|CRMOD)) | CBREAK;
#endif
sTTY(1);
putpad(VS);
pfast |= 2;
return (f);
}
/*
* Stop open, restoring tty modes.
*/
ostop(f)
int f;
{
pfast = (f & CRMOD) == 0;
termreset(), fgoto(), flusho();
normal(f);
putpad(VE);
}
#ifdef V6
/*
* Into cooked mode for interruptibility.
*/
vcook()
{
tty.sg_flags &= ~RAW;
sTTY(1);
}
/*
* Back into raw mode.
*/
vraw()
{
tty.sg_flags |= RAW;
sTTY(1);
}
#endif
/*
* Restore flags to normal state f.
*/
normal(f)
int f;
{
if (normtty > 0) {
setty(f);
normtty--;
}
}
/*
* Straight set of flags to state f.
*/
setty(f)
int f;
{
register int ot = tty.sg_flags;
tty.sg_flags = f;
sTTY(1);
return (ot);
}
gTTY(i)
int i;
{
ignore(gtty(i, &tty));
}
sTTY(i)
int i;
{
#ifdef V6
stty(i, &tty);
#else
ioctl(i, TIOCSETN, &tty);
#endif
}
/*
* Print newline, or blank if in open/visual
*/
noonl()
{
putchar(Outchar != termchar ? ' ' : '\n');
}