// Gather data up to next start-of-tag or end-of-buffer.
// Translate entity references (&).
// Ignore non-whitespace control characters and get rid of \r's.
// If find non-empty token, fill in a[*pai], bump *pai, and return Data.
// Otherwise return -1;
static int
getdata(TokenSource* ts, int firstc, int starti, Token* a, int* pai)
{
Rune* s;
int j;
int c;
Token* tok;
Rune buf[SMALLBUFSIZE];
s = nil;
j = 0;
for(c = firstc; c >= 0; c = getchar(ts)){
if(c == '&') {
c = ampersand(ts);
if(c < 0)
break;
}
else if(c < ' ') {
if(isspace(c)) {
if(c == '\r') {
// ignore it unless no following '\n',
// in which case treat it like '\n'
c = getchar(ts);
if(c != '\n') {
if(c >= 0)
ungetchar(ts, c);
c = '\n';
}
}
}
else {
if(warn)
fprint(2, "warning: non-whitespace control character %d ignored\n", c);
c = 0;
}
}
else if(c == '<') {
ungetchar(ts, c);
break;
}
if(c != 0) {
buf[j++] = c;
if(j == nelem(buf)-1) {
s = buftostr(s, buf, j);
j = 0;
}
}
}
s = buftostr(s, buf, j);
if(s == nil)
return -1;
tok = &a[(*pai)++];
tok->tag = Data;
tok->text = s;
tok->attr = nil;
tok->starti = starti;
return Data;
}
static void
comprhs(int seof)
{
register char *rp, *orp;
register int c;
char orhsbuf[RHSSIZE];
rp = rhsbuf;
CP(orhsbuf, rp);
for (;;) {
c = ex_getchar();
if (c == seof)
break;
switch (c) {
case '\\':
c = ex_getchar();
if (c == EOF) {
ungetchar(c);
break;
}
if (value(MAGIC)) {
/*
* When "magic", \& turns into a plain &,
* and all other chars work fine quoted.
*/
if (c != '&')
c |= RE_QUOTE;
break;
}
magic:
if (c == '~') {
for (orp = orhsbuf; *orp; *rp++ = *orp++)
if (rp >= &rhsbuf[RHSSIZE - 1])
goto toobig;
continue;
}
c |= RE_QUOTE;
break;
case '\n':
case EOF:
ungetchar(c);
goto endrhs;
case '~':
case '&':
if (value(MAGIC))
goto magic;
break;
}
if (rp >= &rhsbuf[RHSSIZE - 1])
toobig:
error("Replacement pattern too long@- limit 256 characters");
*rp++ = c;
}
endrhs:
*rp++ = 0;
}
int readline() {
SIGNAL in1, in2, out;
OPTYPE op;
int ch;
ch = getchar();
if(ch == EOF) {
return 0;
} else if(ch <= 'z' && ch >= 'a') {
ungetchar(ch);
in1 = wire();
} else if(ch <= '9' && ch >= '0') {
ungetchar(ch);
in1 = number();
} else if(ch == 'N') {
ungetchar(ch);
in1.type = NONE;
}
ch = getchar();
switch(ch) {
case '-': op = ASSIGN; break;
case 'A': op = AND; break;
case 'O': op = OR; break;
case 'N': op = NOT; break;
case 'L': op = LSHIFT; break;
case 'R': op = RSHIFT;
}
while((ch = getchar()) != ' ');
if(op == ASSIGN)
out = wire();
else {
ch = getchar();
if(ch <= 'z' && ch >= 'a') {
ungetchar(ch);
in2 = wire();
} else if(ch <= '9' && ch >= '0') {
ungetchar(ch);
in2 = number();
}
while((ch = getchar()) != ' ');
out = wire();
}
printfunction(op, in1, in2, out);
return 1;
}
/*******************************************
* Parsing functions *
******************************************/
void deal_with_function_args() {
char c;
while((c = getchar()) != ')')
putchar(c);
ungetchar(c);
printf("is a function returning ");
}
/*
Read the next token into this.string
if it is alphanumeric, classify_string
else it must be a single character token
this.type = the token itself; terminate this.string
with a nul.
*/
void get_token() {
char c = 'a';
while((c = getchar()) != EOF) {
if(isspace(c)) continue;
else break;
}
if(c == EOF) {
curr_token.type = END;
return;
}
if(isalnum(c) || c == '_') {
int i = 0;
while(isalnum(c) || c == '_') {
curr_token.string[i++] = c;
c = getchar();
}
curr_token.string[i] = 0;
ungetchar(c);
curr_token.type = classify_string();
return;
}
curr_token.type = c;
if(c == '*') {
strcpy(curr_token.string, "pointer to ");
}
else {
curr_token.string[0] = c;
curr_token.string[1] = 0;
}
}
void deal_with_arrays() {
char c;
printf("an array[");
while((c = getchar()) != ']')
putchar(c);
ungetchar(c);
printf("] of ");
}
static int peekchar(void)
{
int c;
c = getchar();
if (c != EOF)
ungetchar(c);
return c;
}
/*
* Ignore a comment to the end of the line.
* This routine eats the trailing newline so don't call donewline().
*/
void
comment(void)
{
int c;
do {
c = getchar();
} while (c != '\n' && c != EOF);
if (c == EOF)
ungetchar(c);
}
void
zop(char hadpr)
{
register int c, lines, op;
zhadpr = hadpr;
notempty();
znoclear = 0;
zweight = 0;
switch(c = op = ex_getchar()) {
case '^':
zweight = 1;
case '-':
case '+':
while (peekchar() == op) {
ex_getchar();
zweight++;
}
case '=':
case '.':
c = ex_getchar();
break;
case EOF:
znoclear++;
break;
default:
op = 0;
break;
}
if (digit(c)) {
lines = c - '0';
for(;;) {
c = ex_getchar();
if (!digit(c))
break;
lines *= 10;
lines += c - '0';
}
if (lines < value(WINDOW))
znoclear++;
if (op == '=')
lines += 2;
} else
lines = op == EOF ? value(SCROLL) : value(WINDOW);
if (c != EOF) {
ungetchar(c);
ex_newline();
}
addr1 = addr2;
setdot();
zop2(lines, op);
}
static int
compsub(int ch)
{
register int seof, c;
int gsubf;
gsubf = 0;
xflag = 0;
switch (ch) {
case 's':
ignore(skipwh());
seof = ex_getchar();
if (endcmd(seof))
error("Substitute needs re|Missing regular expression for substitute");
seof = compile(seof, 1);
savere(subre);
comprhs(seof);
break;
case '&':
if (subre.Expbuf[0] == 0)
error("No previous substitute re|No previous substitute to repeat");
resre(subre);
break;
case '~':
if (re.Expbuf[0] == 0)
error("No previous re|No previous regular expression");
savere(subre);
break;
}
for (;;) {
c = ex_getchar();
switch (c) {
case 'g':
gsubf++;
continue;
case 'c':
xflag++;
continue;
default:
ungetchar(c);
setcount();
ex_newline();
return (gsubf);
}
}
}
// For case where source isn't HTML.
// Just make data tokens, one per line (or partial line,
// at end of buffer), ignoring non-whitespace control
// characters and dumping \r's.
// If find non-empty token, fill in a[*pai], bump *pai, and return Data.
// Otherwise return -1;
static int
getplaindata(TokenSource* ts, Token* a, int* pai)
{
Rune* s;
int j;
int starti;
int c;
Token* tok;
Rune buf[BIGBUFSIZE];
s = nil;
j = 0;
starti = ts->i;
for(c = getchar(ts); c >= 0; c = getchar(ts)) {
if(c < ' ') {
if(isspace(c)) {
if(c == '\r') {
// ignore it unless no following '\n',
// in which case treat it like '\n'
c = getchar(ts);
if(c != '\n') {
if(c >= 0)
ungetchar(ts, c);
c = '\n';
}
}
}
else
c = 0;
}
if(c != 0) {
buf[j++] = c;
if(j == nelem(buf)-1) {
s = buftostr(s, buf, j);
j = 0;
}
}
if(c == '\n')
break;
}
s = buftostr(s, buf, j);
if(s == nil)
return -1;
tok = &a[(*pai)++];
tok->tag = Data;
tok->text = s;
tok->attr = nil;
tok->starti = starti;
return Data;
}
int getopt(char s[]) {
int c, i = 0;
while((s[0] = c = getch()) == SPACE || c == TAB);
s[1] = EOL;
if(!isdigit(c))
return c;
while(isdigit(c = getch()))
s[++i] = c;
ungetchar(c);
s[++i] = EOL;
return NUMBER_TYPE;
}
static int
match(char *ocp)
{
char *cp;
int c;
for (cp = ocp + 1; *cp; cp++) {
c = getchar();
if (c != *cp) {
while (ocp < cp)
(void) putchar(*ocp++);
(void) ungetchar(c);
return (0);
}
}
return (1);
}
int
match(const char *ocp)
{
const char *cp;
int c;
for (cp = ocp + 1; *cp; cp++) {
c = getchar();
if (c != *cp) {
while (ocp < cp)
putchar(*ocp++);
ungetchar(c);
return (0);
}
}
return (1);
}
int Next() {
ungetchar();
switch (sstate) {
case 1: sstate = 6; break;
case 6: sstate = 9; break;
case 9:
printf("line %d: unrecognized token\n", line);
sstate = 1;
str_ptr--;
break;
default:
printf("internal parser error: Next() in rc.c\n");
exit(-1);
}
return sstate;
}
int getword(char *word, int lim) {
char c;
while(isspace(c = getch()))
;
if (c != EOF)
*word++ = c;
if (!isalpha(c)) {
*word = '\0';
return c;
}
for (; --lim > 0; word++) {
if (!isalnum(*word = getch())) {
ungetchar(*word);
break;
}
}
word[0] = '\0';
return word[0];
}
/*
* Parse file name for command encoded by comm.
* If comm is E then command is doomed and we are
* parsing just so user won't have to retype the name.
*/
void
filename(int comm)
{
int c = comm, d;
int i;
d = getchar();
if (endcmd(d)) {
if (savedfile[0] == 0 && comm != 'f')
error(value(vi_TERSE) ? gettext("No file") :
gettext("No current filename"));
CP(file, savedfile);
wasalt = (isalt > 0) ? isalt-1 : 0;
isalt = 0;
oldadot = altdot;
if (c == 'e' || c == 'E')
altdot = lineDOT();
if (d == EOF)
ungetchar(d);
} else {
ungetchar(d);
getone();
eol();
if (savedfile[0] == 0 && c != 'E' && c != 'e') {
c = 'e';
edited = 0;
}
wasalt = strcmp(file, altfile) == 0;
oldadot = altdot;
switch (c) {
case 'f':
edited = 0;
/* FALLTHROUGH */
case 'e':
if (savedfile[0]) {
altdot = lineDOT();
CP(altfile, savedfile);
}
CP(savedfile, file);
break;
default:
if (file[0]) {
if (c != 'E')
altdot = lineDOT();
CP(altfile, file);
}
break;
}
}
if (hush && comm != 'f' || comm == 'E')
return;
if (file[0] != 0) {
lprintf("\"%s\"", file);
if (comm == 'f') {
if (value(vi_READONLY))
viprintf(gettext(" [Read only]"));
if (!edited)
viprintf(gettext(" [Not edited]"));
if (tchng)
viprintf(gettext(" [Modified]"));
}
flush();
} else
viprintf(gettext("No file "));
if (comm == 'f') {
if (!(i = lineDOL()))
i++;
/*
* TRANSLATION_NOTE
* Reference order of arguments must not
* be changed using '%digit$', since vi's
* viprintf() does not support it.
*/
viprintf(gettext(" line %d of %d --%ld%%--"), lineDOT(),
lineDOL(), (long)(100 * lineDOT() / i));
}
}
/*
* Parse file name for command encoded by comm.
* If comm is E then command is doomed and we are
* parsing just so user won't have to retype the name.
*/
void
filename(int comm)
{
register int c = comm, d;
register int i;
d = ex_getchar();
if (endcmd(d)) {
if (savedfile[0] == 0 && comm != 'f')
error("No file|No current filename");
CP(file, savedfile);
wasalt = (isalt > 0) ? isalt-1 : 0;
isalt = 0;
oldadot = altdot;
if (c == 'e' || c == 'E')
altdot = lineDOT();
if (d == EOF)
ungetchar(d);
} else {
ungetchar(d);
getone();
eol();
if (savedfile[0] == 0 && c != 'E' && c != 'e') {
c = 'e';
edited = 0;
}
wasalt = strcmp(file, altfile) == 0;
oldadot = altdot;
switch (c) {
case 'f':
edited = 0;
/* fall into ... */
case 'e':
if (savedfile[0]) {
altdot = lineDOT();
CP(altfile, savedfile);
}
CP(savedfile, file);
break;
default:
if (file[0]) {
if (c != 'E')
altdot = lineDOT();
CP(altfile, file);
}
break;
}
}
if ((hush && comm != 'f') || comm == 'E')
return;
if (file[0] != 0) {
lprintf("\"%s\"", file);
if (comm == 'f') {
if (value(READONLY))
ex_printf(" [Read only]");
if (!edited)
ex_printf(" [Not edited]");
if (tchng)
ex_printf(" [Modified]");
}
flush();
} else
ex_printf("No file ");
if (comm == 'f') {
if (!(i = lineDOL()))
i++;
ex_printf(" line %d of %d --%ld%%--", lineDOT(), lineDOL(),
(long) 100 * lineDOT() / i);
}
}
/*
* Get the argument words for a command into genbuf
* expanding # and %.
*/
int
getargs(void)
{
register int c;
register char *cp, *fp;
static char fpatbuf[32]; /* hence limit on :next +/pat */
pastwh();
if (peekchar() == '+') {
for (cp = fpatbuf;;) {
c = *cp++ = ex_getchar();
if (cp >= &fpatbuf[sizeof(fpatbuf)])
error("Pattern too long");
if (c == '\\' && isspace(peekchar()))
c = ex_getchar();
if (c == EOF || isspace(c)) {
ungetchar(c);
*--cp = 0;
firstpat = &fpatbuf[1];
break;
}
}
}
if (skipend())
return (0);
CP(genbuf, "echo "); cp = &genbuf[5];
for (;;) {
c = ex_getchar();
if (endcmd(c)) {
ungetchar(c);
break;
}
switch (c) {
case '\\':
if (any(peekchar(), "#%|"))
c = ex_getchar();
/* fall into... */
default:
if (cp > &genbuf[LBSIZE - 2])
flong:
error("Argument buffer overflow");
*cp++ = c;
break;
case '#':
fp = altfile;
if (*fp == 0)
error("No alternate filename@to substitute for #");
goto filexp;
case '%':
fp = savedfile;
if (*fp == 0)
error("No current filename@to substitute for %%");
filexp:
while (*fp) {
if (cp > &genbuf[LBSIZE - 2])
goto flong;
*cp++ = *fp++;
}
break;
}
}
*cp = 0;
return (1);
}
vmain()
{
register int c, cnt, i;
char esave[TUBECOLS];
char *oglobp;
char d;
line *addr;
int ind, nlput;
int shouldpo = 0;
int onumber, olist, (*OPline)(), (*OPutchar)();
vch_mac = VC_NOTINMAC;
/*
* If we started as a vi command (on the command line)
* then go process initial commands (recover, next or tag).
*/
if (initev) {
oglobp = globp;
globp = initev;
hadcnt = cnt = 0;
i = tchng;
addr = dot;
goto doinit;
}
/*
* NB:
*
* The current line is always in the line buffer linebuf,
* and the cursor at the position cursor. You should do
* a vsave() before moving off the line to make sure the disk
* copy is updated if it has changed, and a getDOT() to get
* the line back if you mung linebuf. The motion
* routines in ex_vwind.c handle most of this.
*/
for (;;) {
/*
* Decode a visual command.
* First sync the temp file if there has been a reasonable
* amount of change. Clear state for decoding of next
* command.
*/
TSYNC();
vglobp = 0;
vreg = 0;
hold = 0;
seenprompt = 1;
wcursor = 0;
Xhadcnt = hadcnt = 0;
Xcnt = cnt = 1;
splitw = 0;
if (i = holdupd) {
if (state == VISUAL)
ignore(peekkey());
holdupd = 0;
/*
if (LINE(0) < ZERO) {
vclear();
vcnt = 0;
i = 3;
}
*/
if (state != VISUAL) {
vcnt = 0;
vsave();
vrepaint(cursor);
} else if (i == 3)
vredraw(WTOP);
else
vsync(WTOP);
vfixcurs();
}
/*
* Gobble up counts and named buffer specifications.
*/
for (;;) {
looptop:
#ifdef MDEBUG
if (trace)
fprintf(trace, "pc=%c",peekkey());
#endif
if (isdigit(peekkey()) && peekkey() != '0') {
hadcnt = 1;
cnt = vgetcnt();
forbid (cnt <= 0);
}
if (peekkey() != '"')
break;
ignore(getkey()), c = getkey();
/*
* Buffer names be letters or digits.
* But not '0' as that is the source of
* an 'empty' named buffer spec in the routine
* kshift (see ex_temp.c).
*/
forbid (c == '0' || !isalpha(c) && !isdigit(c));
vreg = c;
}
reread:
/*
* Come to reread from below after some macro expansions.
* The call to map allows use of function key pads
* by performing a terminal dependent mapping of inputs.
*/
#ifdef MDEBUG
if (trace)
fprintf(trace,"pcb=%c,",peekkey());
#endif
op = getkey();
maphopcnt = 0;
do {
/*
* Keep mapping the char as long as it changes.
* This allows for double mappings, e.g., q to #,
* #1 to something else.
*/
c = op;
op = map(c,arrows);
#ifdef MDEBUG
if (trace)
fprintf(trace,"pca=%c,",c);
#endif
/*
* Maybe the mapped to char is a count. If so, we have
* to go back to the "for" to interpret it. Likewise
* for a buffer name.
*/
if ((isdigit(c) && c!='0') || c == '"') {
ungetkey(c);
goto looptop;
}
if (!value(REMAP)) {
c = op;
break;
}
if (++maphopcnt > 256)
error("Infinite macro loop");
} while (c != op);
/*
* Begin to build an image of this command for possible
* later repeat in the buffer workcmd. It will be copied
* to lastcmd by the routine setLAST
* if/when completely specified.
*/
lastcp = workcmd;
if (!vglobp)
*lastcp++ = c;
/*
* First level command decode.
*/
switch (c) {
/*
* ^L Clear screen e.g. after transmission error.
*/
/*
* ^R Retype screen, getting rid of @ lines.
* If in open, equivalent to ^L.
* On terminals where the right arrow key sends
* ^L we make ^R act like ^L, since there is no
* way to get ^L. These terminals (adm31, tvi)
* are intelligent so ^R is useless. Soroc
* will probably foul this up, but nobody has
* one of them.
*/
case CTRL(l):
case CTRL(r):
if (c == CTRL(l) || (KR && *KR==CTRL(l))) {
vclear();
vdirty(0, vcnt);
}
if (state != VISUAL) {
/*
* Get a clean line, throw away the
* memory of what is displayed now,
* and move back onto the current line.
*/
vclean();
vcnt = 0;
vmoveto(dot, cursor, 0);
continue;
}
vredraw(WTOP);
/*
* Weird glitch -- when we enter visual
* in a very small window we may end up with
* no lines on the screen because the line
* at the top is too long. This forces the screen
* to be expanded to make room for it (after
* we have printed @'s ick showing we goofed).
*/
if (vcnt == 0)
vrepaint(cursor);
vfixcurs();
continue;
/*
* $ Escape just cancels the current command
* with a little feedback.
*/
case ESCAPE:
beep();
continue;
/*
* @ Macros. Bring in the macro and put it
* in vmacbuf, point vglobp there and punt.
*/
case '@':
c = getesc();
if (c == 0)
continue;
if (c == '@')
c = lastmac;
if (isupper(c))
c = tolower(c);
forbid(!islower(c));
lastmac = c;
vsave();
CATCH
char tmpbuf[BUFSIZ];
regbuf(c,tmpbuf,sizeof(vmacbuf));
macpush(tmpbuf, 1);
ONERR
lastmac = 0;
splitw = 0;
getDOT();
vrepaint(cursor);
continue;
ENDCATCH
vmacp = vmacbuf;
goto reread;
/*
* . Repeat the last (modifying) open/visual command.
*/
case '.':
/*
* Check that there was a last command, and
* take its count and named buffer unless they
* were given anew. Special case if last command
* referenced a numeric named buffer -- increment
* the number and go to a named buffer again.
* This allows a sequence like "1pu.u.u...
* to successively look for stuff in the kill chain
* much as one does in EMACS with C-Y and M-Y.
*/
forbid (lastcmd[0] == 0);
if (hadcnt)
lastcnt = cnt;
if (vreg)
lastreg = vreg;
else if (isdigit(lastreg) && lastreg < '9')
lastreg++;
vreg = lastreg;
cnt = lastcnt;
hadcnt = lasthad;
vglobp = lastcmd;
goto reread;
/*
* ^U Scroll up. A count sticks around for
* future scrolls as the scroll amount.
* Attempt to hold the indentation from the
* top of the screen (in logical lines).
*
* BUG: A ^U near the bottom of the screen
* on a dumb terminal (which can't roll back)
* causes the screen to be cleared and then
* redrawn almost as it was. In this case
* one should simply move the cursor.
*/
case CTRL(u):
if (hadcnt)
vSCROLL = cnt;
cnt = vSCROLL;
if (state == VISUAL)
ind = vcline, cnt += ind;
else
ind = 0;
vmoving = 0;
vup(cnt, ind, 1);
vnline(NOSTR);
continue;
/*
* ^D Scroll down. Like scroll up.
*/
case CTRL(d):
#ifdef TRACE
if (trace)
fprintf(trace, "before vdown in ^D, dot=%d, wdot=%d, dol=%d\n", lineno(dot), lineno(wdot), lineno(dol));
#endif
if (hadcnt)
vSCROLL = cnt;
cnt = vSCROLL;
if (state == VISUAL)
ind = vcnt - vcline - 1, cnt += ind;
else
ind = 0;
vmoving = 0;
vdown(cnt, ind, 1);
#ifdef TRACE
if (trace)
fprintf(trace, "before vnline in ^D, dot=%d, wdot=%d, dol=%d\n", lineno(dot), lineno(wdot), lineno(dol));
#endif
vnline(NOSTR);
#ifdef TRACE
if (trace)
fprintf(trace, "after vnline in ^D, dot=%d, wdot=%d, dol=%d\n", lineno(dot), lineno(wdot), lineno(dol));
#endif
continue;
/*
* ^E Glitch the screen down (one) line.
* Cursor left on same line in file.
*/
case CTRL(e):
if (state != VISUAL)
continue;
if (!hadcnt)
cnt = 1;
/* Bottom line of file already on screen */
forbid(lineDOL()-lineDOT() <= vcnt-1-vcline);
ind = vcnt - vcline - 1 + cnt;
vdown(ind, ind, 1);
vnline(cursor);
continue;
/*
* ^Y Like ^E but up
*/
case CTRL(y):
if (state != VISUAL)
continue;
if (!hadcnt)
cnt = 1;
forbid(lineDOT()-1<=vcline); /* line 1 already there */
ind = vcline + cnt;
vup(ind, ind, 1);
vnline(cursor);
continue;
/*
* m Mark position in mark register given
* by following letter. Return is
* accomplished via ' or `; former
* to beginning of line where mark
* was set, latter to column where marked.
*/
case 'm':
/*
* Getesc is generally used when a character
* is read as a latter part of a command
* to allow one to hit rubout/escape to cancel
* what you have typed so far. These characters
* are mapped to 0 by the subroutine.
*/
c = getesc();
if (c == 0)
continue;
/*
* Markreg checks that argument is a letter
* and also maps ' and ` to the end of the range
* to allow '' or `` to reference the previous
* context mark.
*/
c = markreg(c);
forbid (c == 0);
vsave();
names[c - 'a'] = (*dot &~ 01);
ncols[c - 'a'] = cursor;
anymarks = 1;
continue;
/*
* ^F Window forwards, with 2 lines of continuity.
* Count repeats.
*/
case CTRL(f):
vsave();
if (vcnt > 2) {
addr = dot + (vcnt - vcline) - 2 + (cnt-1)*basWLINES;
forbid(addr > dol);
dot = addr;
vcnt = vcline = 0;
}
vzop(0, 0, '+');
continue;
/*
* ^B Window backwards, with 2 lines of continuity.
* Inverse of ^F.
*/
case CTRL(b):
vsave();
if (one + vcline != dot && vcnt > 2) {
addr = dot - vcline - 2 + (cnt-1)*basWLINES;
forbid (addr <= zero);
dot = addr;
vcnt = vcline = 0;
}
vzop(0, 0, '^');
continue;
/*
* z Screen adjustment, taking a following character:
* z<CR> current line to top
* z<NL> like z<CR>
* z- current line to bottom
* also z+, z^ like ^F and ^B.
* A preceding count is line to use rather
* than current line. A count between z and
* specifier character changes the screen size
* for the redraw.
*
*/
case 'z':
if (state == VISUAL) {
i = vgetcnt();
if (i > 0)
vsetsiz(i);
c = getesc();
if (c == 0)
continue;
}
vsave();
vzop(hadcnt, cnt, c);
continue;
/*
* Y Yank lines, abbreviation for y_ or yy.
* Yanked lines can be put later if no
* changes intervene, or can be put in named
* buffers and put anytime in this session.
*/
case 'Y':
ungetkey('_');
c = 'y';
break;
/*
* J Join lines, 2 by default. Count is number
* of lines to join (no join operator sorry.)
*/
case 'J':
forbid (dot == dol);
if (cnt == 1)
cnt = 2;
if (cnt > (i = dol - dot + 1))
cnt = i;
vsave();
vmacchng(1);
setLAST();
cursor = strend(linebuf);
vremote(cnt, join, 0);
notenam = "join";
vmoving = 0;
killU();
vreplace(vcline, cnt, 1);
if (!*cursor && cursor > linebuf)
cursor--;
if (notecnt == 2)
notecnt = 0;
vrepaint(cursor);
continue;
/*
* S Substitute text for whole lines, abbrev for c_.
* Count is number of lines to change.
*/
case 'S':
ungetkey('_');
c = 'c';
break;
/*
* O Create a new line above current and accept new
* input text, to an escape, there.
* A count specifies, for dumb terminals when
* slowopen is not set, the number of physical
* line space to open on the screen.
*
* o Like O, but opens lines below.
*/
case 'O':
case 'o':
vmacchng(1);
voOpen(c, cnt);
continue;
/*
* C Change text to end of line, short for c$.
*/
case 'C':
if (*cursor) {
ungetkey('$'), c = 'c';
break;
}
goto appnd;
/*
* ~ Switch case of letter under cursor
*/
case '~':
{
char mbuf[4];
setLAST();
mbuf[0] = 'r';
mbuf[1] = *cursor;
mbuf[2] = cursor[1]==0 ? 0 : ' ';
mbuf[3] = 0;
if (isalpha(mbuf[1]))
mbuf[1] ^= ' '; /* toggle the case */
macpush(mbuf, 1);
}
continue;
/*
* A Append at end of line, short for $a.
*/
case 'A':
operate('$', 1);
appnd:
c = 'a';
/* fall into ... */
/*
* a Appends text after cursor. Text can continue
* through arbitrary number of lines.
*/
case 'a':
if (*cursor) {
if (state == HARDOPEN)
putchar(*cursor);
cursor++;
}
goto insrt;
/*
* I Insert at beginning of whitespace of line,
* short for ^i.
*/
case 'I':
operate('^', 1);
c = 'i';
/* fall into ... */
/*
* R Replace characters, one for one, by input
* (logically), like repeated r commands.
*
* BUG: This is like the typeover mode of many other
* editors, and is only rarely useful. Its
* implementation is a hack in a low level
* routine and it doesn't work very well, e.g.
* you can't move around within a R, etc.
*/
case 'R':
/* fall into... */
/*
* i Insert text to an escape in the buffer.
* Text is arbitrary. This command reminds of
* the i command in bare teco.
*/
case 'i':
insrt:
/*
* Common code for all the insertion commands.
* Save for redo, position cursor, prepare for append
* at command and in visual undo. Note that nothing
* is doomed, unless R when all is, and save the
* current line in a the undo temporary buffer.
*/
vmacchng(1);
setLAST();
vcursat(cursor);
prepapp();
vnoapp();
doomed = c == 'R' ? 10000 : 0;
if(FIXUNDO)
vundkind = VCHNG;
vmoving = 0;
CP(vutmp, linebuf);
/*
* If this is a repeated command, then suppress
* fake insert mode on dumb terminals which looks
* ridiculous and wastes lots of time even at 9600B.
*/
if (vglobp)
hold = HOLDQIK;
vappend(c, cnt, 0);
continue;
/*
* ^? An attention, normally a ^?, just beeps.
* If you are a vi command within ex, then
* two ATTN's will drop you back to command mode.
*/
case ATTN:
beep();
if (initev || peekkey() != ATTN)
continue;
/* fall into... */
/*
* ^\ A quit always gets command mode.
*/
case QUIT:
/*
* Have to be careful if we were called
* g/xxx/vi
* since a return will just start up again.
* So we simulate an interrupt.
*/
if (inglobal)
onintr();
/* fall into... */
#ifdef notdef
/*
* q Quit back to command mode, unless called as
* vi on command line in which case dont do it
*/
case 'q': /* quit */
if (initev) {
vsave();
CATCH
error("Q gets ex command mode, :q leaves vi");
ENDCATCH
splitw = 0;
getDOT();
vrepaint(cursor);
continue;
}
#endif
/* fall into... */
/*
* Q Is like q, but always gets to command mode
* even if command line invocation was as vi.
*/
case 'Q':
vsave();
/*
* If we are in the middle of a macro, throw away
* the rest and fix up undo.
* This code copied from getbr().
*/
if (vmacp) {
vmacp = 0;
if (inopen == -1) /* don't screw up undo for esc esc */
vundkind = VMANY;
inopen = 1; /* restore old setting now that macro done */
}
return;
/*
* ZZ Like :x
*/
case 'Z':
forbid(getkey() != 'Z');
oglobp = globp;
globp = "x";
vclrech(0);
goto gogo;
/*
* P Put back text before cursor or before current
* line. If text was whole lines goes back
* as whole lines. If part of a single line
* or parts of whole lines splits up current
* line to form many new lines.
* May specify a named buffer, or the delete
* saving buffers 1-9.
*
* p Like P but after rather than before.
*/
case 'P':
case 'p':
vmoving = 0;
#ifdef notdef
forbid (!vreg && value(UNDOMACRO) && inopen < 0);
#endif
/*
* If previous delete was partial line, use an
* append or insert to put it back so as to
* use insert mode on intelligent terminals.
*/
if (!vreg && DEL[0]) {
forbid ((DEL[0] & (QUOTE|TRIM)) == OVERBUF);
vglobp = DEL;
ungetkey(c == 'p' ? 'a' : 'i');
goto reread;
}
/*
* If a register wasn't specified, then make
* sure there is something to put back.
*/
forbid (!vreg && unddol == dol);
/*
* If we just did a macro the whole buffer is in
* the undo save area. We don't want to put THAT.
*/
forbid (vundkind == VMANY && undkind==UNDALL);
vsave();
vmacchng(1);
setLAST();
i = 0;
if (vreg && partreg(vreg) || !vreg && pkill[0]) {
/*
* Restoring multiple lines which were partial
* lines; will leave cursor in middle
* of line after shoving restored text in to
* split the current line.
*/
i++;
if (c == 'p' && *cursor)
cursor++;
} else {
/*
* In whole line case, have to back up dot
* for P; also want to clear cursor so
* cursor will eventually be positioned
* at the beginning of the first put line.
*/
cursor = 0;
if (c == 'P') {
dot--, vcline--;
c = 'p';
}
}
killU();
/*
* The call to putreg can potentially
* bomb since there may be nothing in a named buffer.
* We thus put a catch in here. If we didn't and
* there was an error we would end up in command mode.
*/
addr = dol; /* old dol */
CATCH
vremote(1, vreg ? putreg : put, vreg);
ONERR
if (vreg == -1) {
splitw = 0;
if (op == 'P')
dot++, vcline++;
goto pfixup;
}
ENDCATCH
splitw = 0;
nlput = dol - addr + 1;
if (!i) {
/*
* Increment undap1, undap2 to make up
* for their incorrect initialization in the
* routine vremote before calling put/putreg.
*/
if (FIXUNDO)
undap1++, undap2++;
vcline++;
nlput--;
/*
* After a put want current line first line,
* and dot was made the last line put in code
* run so far. This is why we increment vcline
* above and decrease dot here.
*/
dot -= nlput - 1;
}
#ifdef TRACE
if (trace)
fprintf(trace, "vreplace(%d, %d, %d), undap1=%d, undap2=%d, dot=%d\n", vcline, i, nlput, lineno(undap1), lineno(undap2), lineno(dot));
#endif
vreplace(vcline, i, nlput);
if (state != VISUAL) {
/*
* Special case in open mode.
* Force action on the screen when a single
* line is put even if it is identical to
* the current line, e.g. on YP; otherwise
* you can't tell anything happened.
*/
vjumpto(dot, cursor, '.');
continue;
}
pfixup:
vrepaint(cursor);
vfixcurs();
continue;
/*
* ^^ Return to previous file.
* Like a :e #, and thus can be used after a
* "No Write" diagnostic.
*/
case CTRL(^):
forbid (hadcnt);
vsave();
ckaw();
oglobp = globp;
if (value(AUTOWRITE))
globp = "e! #";
else
globp = "e #";
goto gogo;
/*
* ^] Takes word after cursor as tag, and then does
* tag command. Read ``go right to''.
*/
case CTRL(]):
grabtag();
oglobp = globp;
globp = "tag";
goto gogo;
/*
* & Like :&
*/
case '&':
oglobp = globp;
globp = "&";
goto gogo;
/*
* ^G Bring up a status line at the bottom of
* the screen, like a :file command.
*
* BUG: Was ^S but doesn't work in cbreak mode
*/
case CTRL(g):
oglobp = globp;
globp = "file";
gogo:
addr = dot;
vsave();
goto doinit;
#ifdef SIGTSTP
/*
* ^Z: suspend editor session and temporarily return
* to shell. Only works with Berkeley/IIASA process
* control in kernel.
*/
case CTRL(z):
forbid(dosusp == 0 || !ldisc);
vsave();
oglobp = globp;
globp = "stop";
goto gogo;
#endif
/*
* : Read a command from the echo area and
* execute it in command mode.
*/
case ':':
forbid (hadcnt);
vsave();
i = tchng;
addr = dot;
if (readecho(c)) {
esave[0] = 0;
goto fixup;
}
getDOT();
/*
* Use the visual undo buffer to store the global
* string for command mode, since it is idle right now.
*/
oglobp = globp; strcpy(vutmp, genbuf+1); globp = vutmp;
doinit:
esave[0] = 0;
fixech();
/*
* Have to finagle around not to lose last
* character after this command (when run from ex
* command mode). This is clumsy.
*/
d = peekc; ungetchar(0);
if (shouldpo) {
/*
* So after a "Hit return..." ":", we do
* another "Hit return..." the next time
*/
pofix();
shouldpo = 0;
}
CATCH
/*
* Save old values of options so we can
* notice when they change; switch into
* cooked mode so we are interruptible.
*/
onumber = value(NUMBER);
olist = value(LIST);
OPline = Pline;
OPutchar = Putchar;
#ifndef CBREAK
vcook();
#endif
commands(1, 1);
if (dot == zero && dol > zero)
dot = one;
#ifndef CBREAK
vraw();
#endif
ONERR
#ifndef CBREAK
vraw();
#endif
copy(esave, vtube[WECHO], TUBECOLS);
ENDCATCH
fixol();
Pline = OPline;
Putchar = OPutchar;
ungetchar(d);
globp = oglobp;
/*
* If we ended up with no lines in the buffer, make
* a line, and don't consider the buffer changed.
*/
if (dot == zero) {
fixzero();
sync();
}
splitw = 0;
/*
* Special case: did list/number options change?
*/
if (onumber != value(NUMBER))
setnumb(value(NUMBER));
if (olist != value(LIST))
setlist(value(LIST));
fixup:
/*
* If a change occurred, other than
* a write which clears changes, then
* we should allow an undo even if .
* didn't move.
*
* BUG: You can make this wrong by
* tricking around with multiple commands
* on one line of : escape, and including
* a write command there, but its not
* worth worrying about.
*/
if (FIXUNDO && tchng && tchng != i)
vundkind = VMANY, cursor = 0;
/*
* If we are about to do another :, hold off
* updating of screen.
*/
if (vcnt < 0 && Peekkey == ':') {
getDOT();
shouldpo = 1;
continue;
}
shouldpo = 0;
/*
* In the case where the file being edited is
* new; e.g. if the initial state hasn't been
* saved yet, then do so now.
*/
if (unddol == truedol) {
vundkind = VNONE;
Vlines = lineDOL();
if (!inglobal)
savevis();
addr = zero;
vcnt = 0;
if (esave[0] == 0)
copy(esave, vtube[WECHO], TUBECOLS);
}
/*
* If the current line moved reset the cursor position.
*/
if (dot != addr) {
vmoving = 0;
cursor = 0;
}
/*
* If current line is not on screen or if we are
* in open mode and . moved, then redraw.
*/
i = vcline + (dot - addr);
if (i < 0 || i >= vcnt && i >= -vcnt || state != VISUAL && dot != addr) {
if (state == CRTOPEN)
vup1();
if (vcnt > 0)
vcnt = 0;
vjumpto(dot, (char *) 0, '.');
} else {
/*
* Current line IS on screen.
* If we did a [Hit return...] then
* restore vcnt and clear screen if in visual
*/
vcline = i;
if (vcnt < 0) {
vcnt = -vcnt;
if (state == VISUAL)
vclear();
else if (state == CRTOPEN) {
vcnt = 0;
}
}
/*
* Limit max value of vcnt based on $
*/
i = vcline + lineDOL() - lineDOT() + 1;
if (i < vcnt)
vcnt = i;
/*
* Dirty and repaint.
*/
vdirty(0, LINES);
vrepaint(cursor);
}
/*
* If in visual, put back the echo area
* if it was clobberred.
*/
if (state == VISUAL) {
int sdc = destcol, sdl = destline;
splitw++;
vigoto(WECHO, 0);
for (i = 0; i < TUBECOLS - 1; i++) {
if (esave[i] == 0)
break;
vputchar(esave[i]);
}
splitw = 0;
vgoto(sdl, sdc);
}
continue;
/*
* u undo the last changing command.
*/
case 'u':
vundo(1);
continue;
/*
* U restore current line to initial state.
*/
case 'U':
vUndo();
continue;
fonfon:
beep();
vmacp = 0;
inopen = 1; /* might have been -1 */
continue;
}
/*
* Rest of commands are decoded by the operate
* routine.
*/
operate(c, cnt);
}
}
void
global(bool k)
{
register char *gp;
register int c;
register line *a1;
char globuf[GBSIZE], *Cwas;
int lines = lineDOL();
char *oglobp = globp;
Cwas = Command;
if (inglobal)
error("Global within global@not allowed");
markDOT();
setall();
nonzero();
if (skipend())
error("Global needs re|Missing regular expression for global");
c = ex_getchar();
ignore(compile(c, 0));
savere(scanre);
gp = globuf;
while ((c = ex_getchar()) != '\n') {
switch (c) {
case EOF:
c = '\n';
goto brkwh;
case '\\':
c = ex_getchar();
switch (c) {
case '\\':
ungetchar(c);
break;
case '\n':
break;
default:
*gp++ = '\\';
break;
}
break;
}
*gp++ = c;
if (gp >= &globuf[GBSIZE - 2])
error("Global command too long");
}
brkwh:
ungetchar(c);
ex_newline();
*gp++ = c;
*gp++ = 0;
inglobal = 1;
for (a1 = one; a1 <= dol; a1++) {
*a1 &= ~01;
if (a1 >= addr1 && a1 <= addr2 && execute(0, a1) == k)
*a1 |= 01;
}
/* should use gdelete from ed to avoid n**2 here on g/.../d */
saveall();
if (inopen)
inopen = -1;
for (a1 = one; a1 <= dol; a1++) {
if (*a1 & 01) {
*a1 &= ~01;
dot = a1;
globp = globuf;
commands(1, 1);
a1 = zero;
}
}
globp = oglobp;
inglobal = 0;
endline = 1;
Command = Cwas;
netchHAD(lines);
setlastchar(EOF);
if (inopen) {
ungetchar(EOF);
inopen = 1;
}
}
void
operate(int c, int cnt)
{
register int i;
void (*moveop)(), (*deleteop)();
void (*opf)();
bool subop = 0;
char *oglobp, *ocurs;
register line *addr;
static char lastFKND, lastFCHR;
char d;
moveop = vmove, deleteop = vdelete;
wcursor = cursor;
wdot = NOLINE;
notecnt = 0;
dir = 1;
switch (c) {
/*
* d delete operator.
*/
case 'd':
moveop = vdelete;
deleteop = beep;
break;
/*
* s substitute characters, like c\040, i.e. change space.
*/
case 's':
ungetkey(' ');
subop++;
/* fall into ... */
/*
* c Change operator.
*/
case 'c':
if ((c == 'c' && workcmd[0] == 'C') || workcmd[0] == 'S')
subop++;
moveop = vchange;
deleteop = beep;
break;
/*
* ! Filter through a UNIX command.
*/
case '!':
moveop = vfilter;
deleteop = beep;
break;
/*
* y Yank operator. Place specified text so that it
* can be put back with p/P. Also yanks to named buffers.
*/
case 'y':
moveop = vyankit;
deleteop = beep;
break;
/*
* = Reformat operator (for LISP).
*/
#ifdef LISP
case '=':
forbid(!value(LISP));
/* fall into ... */
#endif
/*
* > Right shift operator.
* < Left shift operator.
*/
case '<':
case '>':
moveop = vshftop;
deleteop = beep;
break;
/*
* r Replace character under cursor with single following
* character.
*/
case 'r':
vrep(cnt);
return;
default:
goto nocount;
}
/*
* Had an operator, so accept another count.
* Multiply counts together.
*/
if (isdigit(peekkey()) && peekkey() != '0') {
cnt *= vgetcnt();
Xcnt = cnt;
forbid (cnt <= 0);
}
/*
* Get next character, mapping it and saving as
* part of command for repeat.
*/
c = map(getesc());
if (c == 0)
return;
if (!subop)
*lastcp++ = c;
nocount:
opf = moveop;
switch (c) {
/*
* b Back up a word.
* B Back up a word, liberal definition.
*/
case 'b':
case 'B':
dir = -1;
/* fall into ... */
/*
* w Forward a word.
* W Forward a word, liberal definition.
*/
case 'W':
case 'w':
wdkind = c & ' ';
if (edge()) {
forbid (opf == vmove);
wcursor = dir == -1 ? linebuf : strend(linebuf);
} else
while (cnt > 0 && !edge())
word(opf, cnt), cnt--;
vmoving = 0;
break;
/*
* E to end of following blank/nonblank word
*/
case 'E':
wdkind = 0;
goto ein;
/*
* e To end of following word.
*/
case 'e':
wdkind = 1;
ein:
if (edge()) {
forbid(opf == vmove);
wcursor = dir == -1 ? linebuf : strend(linebuf);
} else {
while (cnt > 1 && !edge()) {
word(opf, cnt);
cnt--;
}
eend(opf, cnt);
}
vmoving = 0;
break;
/*
* ( Back an s-expression.
*/
case '(':
dir = -1;
/* fall into... */
/*
* ) Forward an s-expression.
*/
case ')':
forbid(lfind(0, cnt, opf, (line *) 0) < 0);
if (wdot)
markpr(wdot);
break;
/*
* { Back an s-expression, but don't stop on atoms.
* In text mode, a paragraph. For C, a balanced set
* of {}'s.
*/
case '{':
dir = -1;
/* fall into... */
/*
* } Forward an s-expression, but don't stop on atoms.
* In text mode, back paragraph. For C, back a balanced
* set of {}'s.
*/
case '}':
forbid(lfind(1, cnt, opf, (line *) 0) < 0);
if (wdot)
markpr(wdot);
break;
/*
* % To matching () or {}. If not at ( or { scan for
* first such after cursor on this line.
*/
case '%':
vsave();
i = lmatchp((line *) 0);
getDOT();
forbid(!i);
if (opf != vmove)
if (dir > 0)
wcursor++;
else
cursor++;
else
if (wdot)
markpr(wdot);
break;
/*
* [ Back to beginning of defun, i.e. an ( in column 1.
* For text, back to a section macro.
* For C, back to a { in column 1 (~~ beg of function.)
*/
case '[':
dir = -1;
/* fall into ... */
/*
* ] Forward to next defun, i.e. a ( in column 1.
* For text, forward section.
* For C, forward to a } in column 1 (if delete or such)
* or if a move to a { in column 1.
*/
case ']':
if (!vglobp)
forbid(getkey() != c);
if (Xhadcnt)
vsetsiz(Xcnt);
vsave();
i = lbrack(c, opf);
getDOT();
forbid(!i);
if (wdot)
markpr(wdot);
if (ex_ospeed > B300)
hold |= HOLDWIG;
break;
/*
* , Invert last find with f F t or T, like inverse
* of ;.
*/
case ',':
forbid (lastFKND == 0);
c = isupper((int)lastFKND) ? tolower((int)lastFKND) : toupper((int)lastFKND);
ungetkey(lastFCHR);
if (vglobp == 0)
vglobp = "";
subop++;
goto nocount;
/*
* 0 To beginning of real line.
*/
case '0':
wcursor = linebuf;
vmoving = 0;
break;
/*
* ; Repeat last find with f F t or T.
*/
case ';':
forbid (lastFKND == 0);
c = lastFKND;
ungetkey(lastFCHR);
subop++;
goto nocount;
/*
* F Find single character before cursor in current line.
* T Like F, but stops before character.
*/
case 'F': /* inverted find */
case 'T':
dir = -1;
/* fall into ... */
/*
* f Find single character following cursor in current line.
* t Like f, but stope before character.
*/
case 'f': /* find */
case 't':
i = getesc();
if (i == 0)
return;
if (!subop)
*lastcp++ = i;
if (vglobp == 0)
lastFKND = c, lastFCHR = i;
for (; cnt > 0; cnt--)
forbid (find(i) == 0);
switch (c) {
case 'T':
wcursor++;
break;
case 't':
wcursor--;
case 'f':
fixup:
if (moveop != vmove)
wcursor++;
break;
}
vmoving = 0;
break;
/*
* | Find specified print column in current line.
*/
case '|':
if (Pline == numbline)
cnt += 8;
vmovcol = cnt;
vmoving = 1;
wcursor = vfindcol(cnt);
break;
/*
* ^ To beginning of non-white space on line.
*/
case '^':
wcursor = vskipwh(linebuf);
vmoving = 0;
break;
/*
* $ To end of line.
*/
case '$':
if (cnt > 1) {
if (opf == vmove) {
wcursor = 0;
vmoving = 1;
vmovcol = 20000;
cnt--;
} else
wcursor = linebuf;
wdot = dot + cnt;
break;
}
if (linebuf[0]) {
wcursor = strend(linebuf) - 1;
goto fixup;
}
wcursor = linebuf;
vmoving = 0;
break;
/*
* h Back a character.
* ^H Back a character.
*/
case 'h':
case CTRL('h'):
dir = -1;
/* fall into ... */
/*
* space Forward a character.
*/
case ' ':
forbid (margin() || (opf == vmove && edge()));
while (cnt > 0 && !margin())
wcursor += dir, cnt--;
if ((margin() && opf == vmove) || wcursor < linebuf)
wcursor -= dir;
vmoving = 0;
break;
/*
* D Delete to end of line, short for d$.
*/
case 'D':
cnt = INF;
goto deleteit;
/*
* X Delete character before cursor.
*/
case 'X':
dir = -1;
/* fall into ... */
deleteit:
/*
* x Delete character at cursor, leaving cursor where it is.
*/
case 'x':
if (margin())
goto errlab;
while (cnt > 0 && !margin())
wcursor += dir, cnt--;
opf = deleteop;
vmoving = 0;
break;
default:
/*
* Stuttered operators are equivalent to the operator on
* a line, thus turn dd into d_.
*/
if (opf == vmove || c != workcmd[0]) {
errlab:
beep();
return;
}
/* fall into ... */
/*
* _ Target for a line or group of lines.
* Stuttering is more convenient; this is mostly
* for aesthetics.
*/
case '_':
wdot = dot + cnt - 1;
vmoving = 0;
wcursor = 0;
break;
/*
* H To first, home line on screen.
* Count is for count'th line rather than first.
*/
case 'H':
wdot = (dot - vcline) + cnt - 1;
if (opf == vmove)
markit(wdot);
vmoving = 0;
wcursor = 0;
break;
/*
* - Backwards lines, to first non-white character.
*/
case '-':
wdot = dot - cnt;
vmoving = 0;
wcursor = 0;
break;
/*
* ^P To previous line same column. Ridiculous on the
* console of the VAX since it puts console in LSI mode.
*/
case CTRL('p'):
wdot = dot - cnt;
if (vmoving == 0)
vmoving = 1, vmovcol = column(cursor);
wcursor = 0;
break;
/*
* L To last line on screen, or count'th line from the
* bottom.
*/
case 'L':
wdot = dot + vcnt - vcline - cnt;
if (opf == vmove)
markit(wdot);
vmoving = 0;
wcursor = 0;
break;
/*
* M To the middle of the screen.
*/
case 'M':
wdot = dot + ((vcnt + 1) / 2) - vcline - 1;
if (opf == vmove)
markit(wdot);
vmoving = 0;
wcursor = 0;
break;
/*
* + Forward line, to first non-white.
*
* CR Convenient synonym for +.
*/
case '+':
case CR:
wdot = dot + cnt;
vmoving = 0;
wcursor = 0;
break;
/*
* ^N To next line, same column if possible.
*
* LF Linefeed is a convenient synonym for ^N.
*/
case CTRL('n'):
case NL:
wdot = dot + cnt;
if (vmoving == 0)
vmoving = 1, vmovcol = column(cursor);
wcursor = 0;
break;
/*
* n Search to next match of current pattern.
*/
case 'n':
vglobp = vscandir;
c = *vglobp++;
goto nocount;
/*
* N Like n but in reverse direction.
*/
case 'N':
vglobp = vscandir[0] == '/' ? "?" : "/";
c = *vglobp++;
goto nocount;
/*
* ' Return to line specified by following mark,
* first white position on line.
*
* ` Return to marked line at remembered column.
*/
case '\'':
case '`':
d = c;
c = getesc();
if (c == 0)
return;
c = markreg(c);
forbid (c == 0);
wdot = getmark(c);
forbid (wdot == NOLINE);
if (Xhadcnt)
vsetsiz(Xcnt);
if (opf == vmove)
markit(wdot);
vmoving = 0;
wcursor = d == '`' ? ncols[c - 'a'] : 0;
if (wcursor) {
vsave();
ex_getline(*wdot);
if (wcursor > strend(linebuf))
wcursor = 0;
getDOT();
}
if (ex_ospeed > B300)
hold |= HOLDWIG;
break;
/*
* G Goto count'th line, or last line if no count
* given.
*/
case 'G':
if (!Xhadcnt)
cnt = lineDOL();
wdot = zero + cnt;
forbid (wdot < one || wdot > dol);
if (opf == vmove)
markit(wdot);
vmoving = 0;
wcursor = 0;
break;
/*
* / Scan forward for following re.
* ? Scan backward for following re.
*/
case '/':
case '?':
if (Xhadcnt)
vsetsiz(Xcnt);
vsave();
ocurs = cursor;
wcursor = 0;
if (readecho(c))
return;
if (!vglobp)
vscandir[0] = genbuf[0];
oglobp = globp; CP(vutmp, genbuf); globp = vutmp;
d = peekc; ungetchar(0); fixech();
CATCH
#ifdef V6
/*
* Lose typeahead (ick).
*/
vcook();
#endif
addr = address();
#ifdef V6
vraw();
#endif
ONERR
#ifdef V6
vraw();
#endif
globp = oglobp;
ungetchar(d);
splitw = 0;
vclean();
vjumpto(dot, ocurs, 0);
return;
ENDCATCH
if (globp == 0)
globp = "";
else if (peekc)
--globp;
ungetchar(d);
c = 0;
if (*globp == 'z')
globp++, c = '\n';
if (any(*globp, "^+-."))
c = *globp++;
i = 0;
while (isdigit((int)*globp))
i = i * 10 + *globp++ - '0';
if (*globp)
c = *globp++;
globp = oglobp;
splitw = 0;
vmoving = 0;
if (i != 0)
vsetsiz(i);
if (opf == vmove) {
if (state == ONEOPEN || state == HARDOPEN)
outline = destline = WBOT;
markit(addr);
if (loc1 > linebuf && *loc1 == 0)
loc1--;
if (c)
vjumpto(addr, loc1, c);
else {
vmoving = 0;
if (loc1) {
vmoving++;
vmovcol = column(loc1);
}
getDOT();
if (state == CRTOPEN && addr != dot)
vup1();
vupdown(addr - dot, NOSTR);
}
return;
}
lastcp[-1] = 'n';
getDOT();
wdot = addr;
break;
}
/*
* Apply.
*/
if (vreg && wdot == 0)
wdot = dot;
(*opf)(c);
wdot = NOLINE;
}
// We've just seen a '<'. Gather up stuff to closing '>' (if buffer
// ends before then, return -1).
// If it's a tag, look up the name, gather the attributes, and return
// the appropriate token.
// Else it's either just plain data or some kind of ignorable stuff:
// return Data or Comment as appropriate.
// If it's not a Comment, put it in a[*pai] and bump *pai.
static int
gettag(TokenSource* ts, int starti, Token* a, int* pai)
{
int rbra;
int ans;
Attr* al;
int nexti;
int c;
int ti;
int afnd;
int attid;
int quote;
Rune* val;
int nv;
int i;
int tag;
Token* tok;
Rune buf[BIGBUFSIZE];
rbra = 0;
nexti = ts->i;
tok = &a[*pai];
tok->tag = Notfound;
tok->text = nil;
tok->attr = nil;
tok->starti = starti;
c = getchar(ts);
if(c == '/') {
rbra = RBRA;
c = getchar(ts);
}
if(c < 0)
goto eob_done;
if(c >= 256 || !isalpha(c)) {
// not a tag
if(c == '!') {
ans = comment(ts);
if(ans != -1)
return ans;
goto eob_done;
}
else {
backup(ts, nexti);
tok->tag = Data;
tok->text = _Strdup(L"<");
(*pai)++;
return Data;
}
}
// c starts a tagname
buf[0] = c;
i = 1;
while(1) {
c = getchar(ts);
if(c < 0)
goto eob_done;
if(!ISNAMCHAR(c))
break;
// if name is bigger than buf it won't be found anyway...
if(i < BIGBUFSIZE)
buf[i++] = c;
}
if(_lookup(tagtable, Numtags, buf, i, &tag))
tok->tag = tag + rbra;
else
tok->text = _Strndup(buf, i); // for warning print, in build
// attribute gathering loop
al = nil;
while(1) {
// look for "ws name" or "ws name ws = ws val" (ws=whitespace)
// skip whitespace
attrloop_continue:
while(c < 256 && isspace(c)) {
c = getchar(ts);
if(c < 0)
goto eob_done;
}
if(c == '>')
goto attrloop_done;
if(c == '<') {
if(warn)
fprint(2, "warning: unclosed tag\n");
ungetchar(ts, c);
goto attrloop_done;
}
if(c >= 256 || !isalpha(c)) {
if(warn)
fprint(2, "warning: expected attribute name\n");
// skipt to next attribute name
while(1) {
c = getchar(ts);
if(c < 0)
goto eob_done;
if(c < 256 && isalpha(c))
goto attrloop_continue;
if(c == '<') {
if(warn)
fprint(2, "warning: unclosed tag\n");
ungetchar(ts, 60);
goto attrloop_done;
}
if(c == '>')
goto attrloop_done;
}
}
// gather attribute name
buf[0] = c;
i = 1;
while(1) {
c = getchar(ts);
if(c < 0)
goto eob_done;
if(!ISNAMCHAR(c))
break;
if(i < BIGBUFSIZE-1)
buf[i++] = c;
}
afnd = _lookup(attrtable, Numattrs, buf, i, &attid);
if(warn && !afnd) {
buf[i] = 0;
fprint(2, "warning: unknown attribute name %S\n", buf);
}
// skip whitespace
while(c < 256 && isspace(c)) {
c = getchar(ts);
if(c < 0)
goto eob_done;
}
if(c != '=') {
if(afnd)
al = newattr(attid, nil, al);
goto attrloop_continue;
}
//# c is '=' here; skip whitespace
while(1) {
c = getchar(ts);
if(c < 0)
goto eob_done;
if(c >= 256 || !isspace(c))
break;
}
quote = 0;
if(c == '\'' || c == '"') {
quote = c;
c = getchar(ts);
if(c < 0)
goto eob_done;
}
val = nil;
nv = 0;
while(1) {
valloop_continue:
if(c < 0)
goto eob_done;
if(c == '>') {
if(quote) {
// c might be part of string (though not good style)
// but if line ends before close quote, assume
// there was an unmatched quote
ti = ts->i;
while(1) {
c = getchar(ts);
if(c < 0)
goto eob_done;
if(c == quote) {
backup(ts, ti);
buf[nv++] = '>';
if(nv == BIGBUFSIZE-1) {
val = buftostr(val, buf, nv);
nv = 0;
}
c = getchar(ts);
goto valloop_continue;
}
if(c == '\n') {
if(warn)
fprint(2, "warning: apparent unmatched quote\n");
backup(ts, ti);
c = '>';
goto valloop_done;
}
}
}
else
goto valloop_done;
}
if(quote) {
if(c == quote) {
c = getchar(ts);
if(c < 0)
goto eob_done;
goto valloop_done;
}
if(c == '\r') {
c = getchar(ts);
goto valloop_continue;
}
if(c == '\t' || c == '\n')
c = ' ';
}
else {
if(c < 256 && isspace(c))
goto valloop_done;
}
if(c == '&') {
c = ampersand(ts);
if(c == -1)
goto eob_done;
}
buf[nv++] = c;
if(nv == BIGBUFSIZE-1) {
val = buftostr(val, buf, nv);
nv = 0;
}
c = getchar(ts);
}
valloop_done:
if(afnd) {
val = buftostr(val, buf, nv);
al = newattr(attid, val, al);
}
}
attrloop_done:
tok->attr = al;
(*pai)++;
return tok->tag;
eob_done:
if(warn)
fprint(2, "warning: incomplete tag at end of page\n");
backup(ts, nexti);
tok->tag = Data;
tok->text = _Strdup(L"<");
return Data;
}
/*
* Main loop for command mode command decoding.
* A few commands are executed here, but main function
* is to strip command addresses, do a little address oriented
* processing and call command routines to do the real work.
*/
void
commands(bool noprompt, bool exitoneof)
{
register line *addr;
register int c;
register int lchng;
int given;
int seensemi;
int cnt;
bool hadpr;
resetflav();
nochng();
for (;;) {
/*
* If dot at last command
* ended up at zero, advance to one if there is a such.
*/
if (dot <= zero) {
dot = zero;
if (dol > zero)
dot = one;
}
shudclob = 0;
/*
* If autoprint or trailing print flags,
* print the line at the specified offset
* before the next command.
*/
if (pflag ||
(lchng != chng && value(AUTOPRINT) && !inglobal && !inopen && endline)) {
pflag = 0;
nochng();
if (dol != zero) {
addr1 = addr2 = dot + poffset;
if (addr1 < one || addr1 > dol)
error("Offset out-of-bounds|Offset after command too large");
setdot1();
goto print;
}
}
nochng();
/*
* Print prompt if appropriate.
* If not in global flush output first to prevent
* going into pfast mode unreasonably.
*/
if (inglobal == 0) {
flush();
if (!hush && value(PROMPT) && !globp && !noprompt && endline) {
ex_putchar(':');
hadpr = 1;
}
TSYNC();
}
/*
* Gobble up the address.
* Degenerate addresses yield ".".
*/
addr2 = 0;
given = seensemi = 0;
do {
addr1 = addr2;
addr = address(0);
c = getcd();
if (addr == 0) {
if (c == ',')
addr = dot;
else if (addr1 != 0) {
addr2 = dot;
break;
} else
break;
}
addr2 = addr;
given++;
if (c == ';') {
c = ',';
dot = addr;
seensemi = 1;
}
} while (c == ',');
if (c == '%') {
/* %: same as 1,$ */
addr1 = one;
addr2 = dol;
given = 2;
c = ex_getchar();
}
if (addr1 == 0)
addr1 = addr2;
if (c == ':')
c = ex_getchar();
/*
* Set command name for special character commands.
*/
tailspec(c);
/*
* If called via : escape from open or visual, limit
* the set of available commands here to save work below.
*/
if (inopen) {
if (c=='\n' || c=='\r' || c==CTRL('d') || c==EOF) {
if (addr2)
dot = addr2;
if (c == EOF)
return;
continue;
}
if (any(c, "o"))
notinvis:
tailprim(Command, 1, 1);
}
switch (c) {
case 'a':
switch(peekchar()) {
case 'b':
/* abbreviate */
tail("abbreviate");
setnoaddr();
mapcmd(0, 1);
anyabbrs = 1;
continue;
case 'r':
/* args */
tail("args");
setnoaddr();
eol();
pargs();
continue;
}
/* append */
if (inopen)
goto notinvis;
tail("append");
setdot();
aiflag = exclam();
ex_newline();
vmacchng(0);
deletenone();
setin(addr2);
inappend = 1;
ignore(append(gettty, addr2));
inappend = 0;
nochng();
continue;
case 'c':
switch (peekchar()) {
/* copy */
case 'o':
tail("copy");
vmacchng(0);
move();
continue;
#ifdef CHDIR
/* cd */
case 'd':
tail("cd");
goto changdir;
/* chdir */
case 'h':
ignchar();
if (peekchar() == 'd') {
register char *p;
tail2of("chdir");
changdir:
if (savedfile[0] == '/' || !value(WARN))
ignore(exclam());
else
ignore(quickly());
if (skipend()) {
p = getenv("HOME");
if (p == NULL)
error("Home directory unknown");
} else
getone(), p = file;
eol();
if (chdir(p) < 0)
filioerr(p);
if (savedfile[0] != '/')
edited = 0;
continue;
}
if (inopen)
tailprim("change", 2, 1);
tail2of("change");
break;
#endif
default:
if (inopen)
goto notinvis;
tail("change");
break;
}
/* change */
aiflag = exclam();
setCNL();
vmacchng(0);
setin(addr1);
delete(0);
inappend = 1;
ignore(append(gettty, addr1 - 1));
inappend = 0;
nochng();
continue;
/* delete */
case 'd':
/*
* Caution: dp and dl have special meaning already.
*/
tail("delete");
c = cmdreg();
setCNL();
vmacchng(0);
if (c)
YANKreg(c);
delete(0);
appendnone();
continue;
/* edit */
/* ex */
case 'e':
tail(peekchar() == 'x' ? "ex" : "edit");
editcmd:
if (!exclam() && chng)
c = 'E';
filename(c);
if (c == 'E') {
ungetchar(lastchar());
ignore(quickly());
}
setnoaddr();
doecmd:
init();
addr2 = zero;
laste++;
ex_sync();
rop(c);
nochng();
continue;
/* file */
case 'f':
tail("file");
setnoaddr();
filename(c);
noonl();
/*
synctmp();
*/
continue;
/* global */
case 'g':
tail("global");
global(!exclam());
nochng();
continue;
/* insert */
case 'i':
if (inopen)
goto notinvis;
tail("insert");
setdot();
nonzero();
aiflag = exclam();
ex_newline();
vmacchng(0);
deletenone();
setin(addr2);
inappend = 1;
ignore(append(gettty, addr2 - 1));
inappend = 0;
if (dot == zero && dol > zero)
dot = one;
nochng();
continue;
/* join */
case 'j':
tail("join");
c = exclam();
setcount();
nonzero();
ex_newline();
vmacchng(0);
if (given < 2 && addr2 != dol)
addr2++;
join(c);
continue;
/* k */
case 'k':
casek:
pastwh();
c = ex_getchar();
if (endcmd(c))
serror("Mark what?|%s requires following letter", Command);
ex_newline();
if (!islower(c))
error("Bad mark|Mark must specify a letter");
setdot();
nonzero();
names[c - 'a'] = *addr2 &~ 01;
anymarks = 1;
continue;
/* list */
case 'l':
tail("list");
setCNL();
ignorf(setlist(1));
pflag = 0;
goto print;
case 'm':
if (peekchar() == 'a') {
ignchar();
if (peekchar() == 'p') {
/* map */
tail2of("map");
setnoaddr();
mapcmd(0, 0);
continue;
}
/* mark */
tail2of("mark");
goto casek;
}
/* move */
tail("move");
vmacchng(0);
move();
continue;
case 'n':
if (peekchar() == 'u') {
tail("number");
goto numberit;
}
/* next */
tail("next");
setnoaddr();
ckaw();
ignore(quickly());
if (getargs())
makargs();
next();
c = 'e';
filename(c);
goto doecmd;
/* open */
case 'o':
tail("open");
oop();
pflag = 0;
nochng();
continue;
case 'p':
case 'P':
switch (peekchar()) {
/* put */
case 'u':
tail("put");
setdot();
c = cmdreg();
eol();
vmacchng(0);
if (c)
putreg(c);
else
put();
continue;
case 'r':
ignchar();
if (peekchar() == 'e') {
/* preserve */
tail2of("preserve");
eol();
if (preserve() == 0)
error("Preserve failed!");
else
error("File preserved.");
}
tail2of("print");
break;
default:
tail("print");
break;
}
/* print */
setCNL();
pflag = 0;
print:
nonzero();
if (CL && span() > EX_LINES) {
flush1();
vclear();
}
plines(addr1, addr2, 1);
continue;
/* quit */
case 'q':
tail("quit");
setnoaddr();
c = quickly();
eol();
if (!c)
quit:
nomore();
if (inopen) {
vgoto(WECHO, 0);
if (!ateopr())
vnfl();
else {
tostop();
}
flush();
setty(normf);
}
cleanup(1);
ex_exit(0);
case 'r':
if (peekchar() == 'e') {
ignchar();
switch (peekchar()) {
/* rewind */
case 'w':
tail2of("rewind");
setnoaddr();
if (!exclam()) {
ckaw();
if (chng && dol > zero)
error("No write@since last chage (:rewind! overrides)");
}
eol();
erewind();
next();
c = 'e';
ungetchar(lastchar());
filename(c);
goto doecmd;
/* recover */
case 'c':
tail2of("recover");
setnoaddr();
c = 'e';
if (!exclam() && chng)
c = 'E';
filename(c);
if (c == 'E') {
ungetchar(lastchar());
ignore(quickly());
}
init();
addr2 = zero;
laste++;
ex_sync();
recover();
rop2();
revocer();
if (status == 0)
rop3(c);
if (dol != zero)
change();
nochng();
continue;
}
tail2of("read");
} else
tail("read");
/* read */
if (savedfile[0] == 0 && dol == zero)
c = 'e';
pastwh();
vmacchng(0);
if (peekchar() == '!') {
setdot();
ignchar();
unix0(0);
filter(0);
continue;
}
filename(c);
rop(c);
nochng();
if (inopen && endline && addr1 > zero && addr1 < dol)
dot = addr1 + 1;
continue;
case 's':
switch (peekchar()) {
/*
* Caution: 2nd char cannot be c, g, or r
* because these have meaning to substitute.
*/
/* set */
case 'e':
tail("set");
setnoaddr();
set();
continue;
/* shell */
case 'h':
tail("shell");
setNAEOL();
vnfl();
putpad(TE);
flush();
unixwt(1, unixex("-i", (char *) 0, 0, 0));
vcontin(0);
continue;
/* source */
case 'o':
#ifdef notdef
if (inopen)
goto notinvis;
#endif
tail("source");
setnoaddr();
getone();
eol();
source(file, 0);
continue;
#ifdef SIGTSTP
/* stop, suspend */
case 't':
tail("stop");
goto suspend;
case 'u':
tail("suspend");
suspend:
if (!dosusp)
error("Old tty driver|Not using new tty driver/shell");
c = exclam();
eol();
if (!c)
ckaw();
onsusp(0);
continue;
#endif
}
/* fall into ... */
/* & */
/* ~ */
/* substitute */
case '&':
case '~':
Command = "substitute";
if (c == 's')
tail(Command);
vmacchng(0);
if (!substitute(c))
pflag = 0;
continue;
/* t */
case 't':
if (peekchar() == 'a') {
tail("tag");
tagfind(exclam());
if (!inopen)
lchng = chng - 1;
else
nochng();
continue;
}
tail("t");
vmacchng(0);
move();
continue;
case 'u':
if (peekchar() == 'n') {
ignchar();
switch(peekchar()) {
/* unmap */
case 'm':
tail2of("unmap");
setnoaddr();
mapcmd(1, 0);
continue;
/* unabbreviate */
case 'a':
tail2of("unabbreviate");
setnoaddr();
mapcmd(1, 1);
anyabbrs = 1;
continue;
}
/* undo */
tail2of("undo");
} else
tail("undo");
setnoaddr();
markDOT();
c = exclam();
ex_newline();
undo(c);
continue;
case 'v':
switch (peekchar()) {
case 'e':
/* version */
tail("version");
setNAEOL();
ex_printf("@(#) Version 3.6, 11/3/80"
" (4.0BSD). git "
"160803 14:24"
+5);
noonl();
continue;
/* visual */
case 'i':
tail("visual");
if (inopen) {
c = 'e';
goto editcmd;
}
vop();
pflag = 0;
nochng();
continue;
}
/* v */
tail("v");
global(0);
nochng();
continue;
/* write */
case 'w':
c = peekchar();
tail(c == 'q' ? "wq" : "write");
wq:
if (skipwh() && peekchar() == '!') {
pofix();
ignchar();
setall();
unix0(0);
filter(1);
} else {
setall();
wop(1);
nochng();
}
if (c == 'q')
goto quit;
continue;
/* xit */
case 'x':
tail("xit");
if (!chng)
goto quit;
c = 'q';
goto wq;
/* yank */
case 'y':
tail("yank");
c = cmdreg();
setcount();
eol();
vmacchng(0);
if (c)
YANKreg(c);
else
yank();
continue;
/* z */
case 'z':
zop(0);
pflag = 0;
continue;
/* * */
/* @ */
case '*':
case '@':
c = ex_getchar();
if (c=='\n' || c=='\r')
ungetchar(c);
if (any(c, "@*\n\r"))
c = lastmac;
if (isupper(c))
c = tolower(c);
if (!islower(c))
error("Bad register");
ex_newline();
setdot();
cmdmac(c);
continue;
/* | */
case '|':
endline = 0;
goto caseline;
/* \n */
case '\n':
endline = 1;
caseline:
notempty();
if (addr2 == 0) {
if (UP != NOSTR && c == '\n' && !inglobal)
c = CTRL('k');
if (inglobal)
addr1 = addr2 = dot;
else {
if (dot == dol)
error("At EOF|At end-of-file");
addr1 = addr2 = dot + 1;
}
}
setdot();
nonzero();
if (seensemi)
addr1 = addr2;
ex_getline(*addr1);
if (c == CTRL('k')) {
flush1();
destline--;
if (hadpr)
shudclob = 1;
}
plines(addr1, addr2, 1);
continue;
/* " */
case '"':
comment();
continue;
/* # */
case '#':
numberit:
setCNL();
ignorf(setnumb(1));
pflag = 0;
goto print;
/* = */
case '=':
ex_newline();
setall();
if (inglobal == 2)
pofix();
ex_printf("%d", lineno(addr2));
noonl();
continue;
/* ! */
case '!':
if (addr2 != 0) {
vmacchng(0);
unix0(0);
setdot();
filter(2);
} else {
unix0(1);
pofix();
putpad(TE);
flush();
unixwt(1, unixex("-c", uxb, 0, 0));
vclrech(1); /* vcontin(0); */
nochng();
}
continue;
/* < */
/* > */
case '<':
case '>':
for (cnt = 1; peekchar() == c; cnt++)
ignchar();
setCNL();
vmacchng(0);
shift(c, cnt);
continue;
/* ^D */
/* EOF */
case CTRL('d'):
case EOF:
if (exitoneof) {
if (addr2 != 0)
dot = addr2;
return;
}
if (!isatty(0)) {
if (intty)
/*
* Chtty sys call at UCB may cause a
* input which was a tty to suddenly be
* turned into /dev/null.
*/
onhup(0);
return;
}
if (addr2 != 0) {
setlastchar('\n');
putnl();
}
if (dol == zero) {
if (addr2 == 0)
putnl();
notempty();
}
ungetchar(EOF);
zop(hadpr);
continue;
default:
if (!isalpha(c))
break;
ungetchar(c);
tailprim("", 0, 0);
}
ierror("What?|Unknown command character '%c'", c);
}
}
int main()
{
// FLAGS
int startF = 1;
int pcstart = 0;
int pcend = 0;
int blockF = 0;
int lineF = 0;
int stringF = 0;
int charF = 0;
int whiteF = 0;
int newlineF = 0;
int c;
while ((c = getchar()) != EOF) {
// REMOVE LINE SPLICES
if (c == '\\') {
int d = getchar();
// ESCAPE CHARACTER CONSIDERATIONS
if (d == '"' && stringF) {
putchar(c);
putchar(d);
continue;
}
if (d == '\'' && charF) {
putchar(c);
putchar(d);
continue;
}
else if (d == '\\' && (stringF || charF)) {
putchar(c);
putchar(d);
continue;
}
else if (d != '\n') {
ungetchar(d);
}
else {
continue;
}
}
// INSIDE BLOCK COMMENT
if (blockF) {
if (c == '*') {
pcend = 1;
}
else if (c == '/' && pcend) {
blockF = 0;
whiteF = 1;
}
else {
pcend = 0;
}
}
// INSIDE LINE COMMENT
else if (lineF) {
if (c == '\n') {
lineF = 0;
whiteF = 1;
newlineF = 1;
}
}
// INSIDE STRING
else if (stringF) {
if (c == '"') {
stringF = 0;
}
putchar(c);
}
// INSIDE CHAR CONSTANT
else if (charF) {
if (c == '\'') {
charF = 0;
}
putchar(c);
}
// DETECT WHITESPACES
else if (c == ' ') {
whiteF = 1;
}
// DETECT NEWLINES
else if (c == '\n') {
newlineF = 1;
}
// DETECT BLOCK COMMENT
else if (c == '*' && pcstart) {
blockF = 1;
pcstart = 0;
}
// DETECT LINE COMMENT
else if (c == '/' && pcstart) {
lineF = 1;
pcstart = 0;
}
// DETECT POSSIBLE COMMENT
else if (c == '/') {
pcstart = 1;
}
// OTHER CASES
else {
// START OF FILE CONSIDERATION
if (startF) {
whiteF = 0;
newlineF = 0;
startF = 0;
}
else if (newlineF) {
int d = '\n';
putchar(d);
whiteF = 0;
newlineF = 0;
}
else if (whiteF) {
int d = ' ';
putchar(d);
whiteF = 0;
}
// DETECT STRING
if (c == '"') {
stringF = 1;
}
// DETECT CHAR CONSTANT
if (c == '\'') {
charF = 1;
}
// TURN OFF PCSTART
if (pcstart) {
pcstart = 0;
int d = '/';
putchar(d);
}
putchar(c);
}
}
// END OF FILE CONSIDERATIONS
if (pcstart) {
int d = '/';
putchar(d);
}
if (startF) {
// EMPTY FILE CONSIDERATION
}
else if (newlineF) {
int d = '\n';
putchar(d);
}
else if (whiteF) {
int d = ' ';
putchar(d);
}
else if (blockF || lineF) {
int d = '\n';
putchar(d);
}
else {
}
}
/*ARGSUSED*/
void
vfilter(int unused)
{
register line *addr;
register int cnt;
char *oglobp;
short d;
#ifdef BIT8
cell cuxb[UXBSIZE + 2];
#endif
if ((cnt = xdw()) < 0)
return;
if (vglobp)
#ifdef BIT8
vglobp = cuxb;
#else
vglobp = uxb;
#endif
if (readecho('!'))
return;
oglobp = globp; globp = genbuf + 1;
d = peekc; ungetchar(0);
CATCH
fixech();
unix0(0);
#ifdef BIT8
str2cell(cuxb, uxb);
#endif
ONERR
splitw = 0;
ungetchar(d);
vrepaint(cursor);
globp = oglobp;
return;
ENDCATCH
ungetchar(d); globp = oglobp;
addr = dot;
CATCH
vgoto(WECHO, 0); flusho();
vremote(cnt, filter, 2);
ONERR
vdirty(0, TLINES);
ENDCATCH
if (dot == zero && dol > zero)
dot = one;
splitw = 0;
notenam = "";
/*
* BUG: we shouldn't be depending on what undap2 and undap1 are,
* since we may be inside a macro. What's really wanted is the
* number of lines we read from the filter. However, the mistake
* will be an overestimate so it only results in extra work,
* it shouldn't cause any real screwups.
*/
vreplace(vcline, cnt, undap2 - undap1);
dot = addr;
if (dot > dol) {
dot--;
vcline--;
}
vrepaint(NOSTR);
}
int
compile(int eof, int oknl)
{
register int c;
register char *ep;
char *lastep;
char bracket[NBRA], *bracketp, *rhsp;
int cclcnt;
if (isalpha(eof) || isdigit(eof))
error("Re delimiter must not be letter or digit|Regular expressions cannot be delimited by letters or digits");
lastep = ep = expbuf;
c = ex_getchar();
if (eof == '\\')
switch (c) {
case '/':
case '?':
if (scanre.Expbuf[0] == 0)
error("No previous scan re|No previous scanning regular expression");
resre(scanre);
return (c);
case '&':
if (subre.Expbuf[0] == 0)
error("No previous substitute re|No previous substitute regular expression");
resre(subre);
return (c);
default:
error("Badly formed re|Regular expression \\ must be followed by / or ?");
}
if (c == eof || c == '\n' || c == EOF) {
if (*ep == 0)
error("No previous re|No previous regular expression");
if (c == '\n' && oknl == 0)
error("Missing closing delimiter@for regular expression");
if (c != eof)
ungetchar(c);
return (eof);
}
bracketp = bracket;
nbra = 0;
circfl = 0;
if (c == '^') {
c = ex_getchar();
circfl++;
}
ungetchar(c);
for (;;) {
if (ep >= &expbuf[ESIZE - 2])
complex:
cerror("Re too complex|Regular expression too complicated");
c = ex_getchar();
if (c == eof || c == EOF) {
if (bracketp != bracket)
cerror("Unmatched \\(|More \\('s than \\)'s in regular expression");
*ep++ = EX_CEOF;
if (c == EOF)
ungetchar(c);
return (eof);
}
if (value(MAGIC)) {
if (c != '*' || ep == expbuf)
lastep = ep;
} else
if (c != '\\' || peekchar() != '*' || ep == expbuf)
lastep = ep;
switch (c) {
case '\\':
if (!intag)
c = ex_getchar();
switch (c) {
case '(':
if (nbra >= NBRA)
cerror("Awash in \\('s!|Too many \\('d subexressions in a regular expression");
*bracketp++ = nbra;
*ep++ = CBRA;
*ep++ = nbra++;
continue;
case ')':
if (bracketp <= bracket)
cerror("Extra \\)|More \\)'s than \\('s in regular expression");
*ep++ = CKET;
*ep++ = *--bracketp;
continue;
case '<':
*ep++ = CBRC;
continue;
case '>':
*ep++ = CLET;
continue;
}
if (value(MAGIC) == 0 && !intag)
magic:
switch (c) {
case '.':
*ep++ = CDOT;
continue;
case '~':
rhsp = rhsbuf;
while (*rhsp) {
if (*rhsp & RE_QUOTE) {
c = *rhsp & TRIM;
if (c == '&')
error("Replacement pattern contains &@- cannot use in re");
if (c >= '1' && c <= '9')
error("Replacement pattern contains \\d@- cannot use in re");
}
if (ep >= &expbuf[ESIZE-2])
goto complex;
*ep++ = CCHR;
*ep++ = *rhsp++ & TRIM;
}
continue;
case '*':
if (ep == expbuf)
break;
if (*lastep == CBRA || *lastep == CKET)
cerror("Illegal *|Can't * a \\( ... \\) in regular expression");
if (*lastep == CCHR && (lastep[1] & RE_QUOTE))
cerror("Illegal *|Can't * a \\n in regular expression");
*lastep |= STAR;
continue;
case '[':
*ep++ = CCL;
*ep++ = 0;
cclcnt = 1;
c = ex_getchar();
if (c == '^') {
c = ex_getchar();
ep[-2] = NCCL;
}
if (c == ']')
cerror("Bad character class|Empty character class '[]' or '[^]' cannot match");
while (c != ']') {
if (c == '\\' && any(peekchar(), "]-^\\"))
c = ex_getchar() | RE_QUOTE;
if (c == '\n' || c == EOF)
cerror("Missing ]");
*ep++ = c;
cclcnt++;
if (ep >= &expbuf[ESIZE])
goto complex;
c = ex_getchar();
}
lastep[1] = cclcnt;
continue;
}
if (c == EOF) {
ungetchar(EOF);
c = '\\';
goto defchar;
}
*ep++ = CCHR;
if (c == '\n')
cerror("No newlines in re's|Can't escape newlines into regular expressions");
/*
if (c < '1' || c > NBRA + '1') {
*/
*ep++ = c;
continue;
/*
}
c -= '1';
if (c >= nbra)
cerror("Bad \\n|\\n in regular expression with n greater than the number of \\('s");
*ep++ = c | RE_QUOTE;
continue;
*/
case '\n':
if (oknl) {
ungetchar(c);
*ep++ = EX_CEOF;
return (eof);
}
cerror("Badly formed re|Missing closing delimiter for regular expression");
case '$':
if (peekchar() == eof || peekchar() == EOF || (oknl && peekchar() == '\n')) {
*ep++ = CDOL;
continue;
}
goto defchar;
case '.':
case '~':
case '*':
case '[':
if (value(MAGIC) && !intag)
goto magic;
defchar:
default:
*ep++ = CCHR;
*ep++ = c;
continue;
}
}
}
// We've just read an '&'; look for an entity reference
// name, and if found, return translated char.
// if there is a complete entity name but it isn't known,
// back up to just past the '&' and return '&'.
// If the entity can't be completed in the current buffer, back up
// to the '&' and return -1.
static int
ampersand(TokenSource* ts)
{
int savei;
int c;
int fnd;
int ans;
int v;
int k;
Rune buf[25];
savei = ts->i;
c = getchar(ts);
fnd = 0;
ans = -1;
if(c == '#') {
c = getchar(ts);
v = 0;
if(c == 'X' || c == 'x')
for(c = getchar(ts); c < 256; c = getchar(ts))
if(c >= '0' && c <= '9')
v = v*16+c-'0';
else if(c >= 'A' && c<= 'F')
v = v*16+c-'A'+10;
else if(c >= 'a' && c <= 'f')
v = v*16+c-'a'+10;
else
break;
else
while(c >= 0) {
if(!(c < 256 && isdigit(c)))
break;
v = v*10 + c - 48;
c = getchar(ts);
}
if(c >= 0) {
if(!(c == ';' || c == '\n' || c == '\r'))
ungetchar(ts, c);
c = v;
if(c == 160)
c = 160;
if(c >= Winstart && c <= Winend) {
c = winchars[c - Winstart];
}
ans = c;
fnd = 1;
}
}
else if(c < 256 && isalpha(c)) {
buf[0] = c;
k = 1;
while(1) {
c = getchar(ts);
if(c < 0)
break;
if(c < 256 && (isalpha(c) || isdigit(c))) {
if(k < nelem(buf)-1)
buf[k++] = c;
}
else {
if(!(c == ';' || c == '\n' || c == '\r'))
ungetchar(ts, c);
break;
}
}
if(c >= 256 || c != '=' && !(isalpha(c) || isdigit(c)))
fnd = _lookup(chartab, NCHARTAB, buf, k, &ans);
}
if(!fnd) {
backup(ts, savei);
ans = '&';
}
return ans;
}
/*
* Main procedure. Process arguments and then
* transfer control to the main command processing loop
* in the routine commands. We are entered as either "ex", "edit" or "vi"
* and the distinction is made here. Actually, we are "vi" if
* there is a 'v' in our name, and "edit" if there is a 'd' in our
* name. For edit we just diddle options; for vi we actually
* force an early visual command, setting the external initev so
* the q command in visual doesn't give command mode.
*/
int
main(int ac, char **av)
{
#if 0
char *erpath = EXSTRINGS;
#endif
register char *cp;
register int c;
bool recov = 0;
bool ivis = any('v', av[0]);
bool itag = 0;
bool fast = 0;
#ifdef TRACE
register char *tracef;
#endif
/*
* Immediately grab the tty modes so that we wont
* get messed up if an interrupt comes in quickly.
*/
gTTY(1);
normf = tty;
#if 0
/*
* For debugging take files out of . if name is a.out.
* If a 'd' in our name, then set options for edit.
*/
if (av[0][0] == 'a')
erpath += 9;
#endif
if (ivis) {
options[MAGIC].odefault = value(MAGIC) = 0;
options[BEAUTIFY].odefault = value(BEAUTIFY) = 1;
} else if (any('d', av[0])) {
value(OPEN) = 0;
value(REPORT) = 1;
value(MAGIC) = 0;
}
/*
* Open the error message file.
*/
draino();
#if 0
erfile = open(erpath, 0);
if (erfile < 0) {
flush();
exit(1);
}
#endif
pstop();
/*
* Initialize interrupt handling.
*/
oldhup = signal(SIGHUP, SIG_IGN);
if (oldhup == SIG_DFL)
signal(SIGHUP, onhup);
oldquit = signal(SIGQUIT, SIG_IGN);
ruptible = signal(SIGINT, SIG_IGN) == SIG_DFL;
if (signal(SIGTERM, SIG_IGN) == SIG_DFL)
signal(SIGTERM, onhup);
/*
* Initialize end of core pointers.
* Normally we avoid breaking back to fendcore after each
* file since this can be expensive (much core-core copying).
* If your system can scatter load processes you could do
* this as ed does, saving a little core, but it will probably
* not often make much difference.
*/
#ifdef UNIX_SBRK
fendcore = (line *) sbrk(0);
endcore = fendcore - 2;
#else
# define LINELIMIT 0x8000
fendcore = malloc(LINELIMIT * sizeof(line *));
endcore = fendcore + LINELIMIT - 1;
#endif
/*
* Process flag arguments.
*/
ac--, av++;
while (ac && av[0][0] == '-') {
c = av[0][1];
if (c == 0) {
hush = 1;
value(AUTOPRINT) = 0;
fast++;
} else switch (c) {
#ifdef TRACE
case 'T':
if (av[0][2] == 0)
tracef = "trace";
else {
tracef = tttrace;
tracef[8] = av[0][2];
if (tracef[8])
tracef[9] = av[0][3];
else
tracef[9] = 0;
}
trace = fopen(tracef, "w");
if (trace == NULL)
ex_printf("Trace create error\n");
setbuf(trace, tracbuf);
break;
#endif
#ifdef LISP
case 'l':
value(LISP) = 1;
value(SHOWMATCH) = 1;
break;
#endif
case 'r':
recov++;
break;
case 't':
if (ac > 1 && av[1][0] != '-') {
ac--, av++;
itag = 1;
/* BUG: should check for too long tag. */
CP(lasttag, av[0]);
}
break;
case 'v':
globp = "";
ivis = 1;
break;
default:
smerror("Unknown option %s\n", av[0]);
break;
}
ac--, av++;
}
if (ac && av[0][0] == '+') {
firstln = getn(av[0] + 1);
if (firstln == 0)
firstln = 20000;
ac--, av++;
}
/*
* If we are doing a recover and no filename
* was given, then execute an exrecover command with
* the -r option to type out the list of saved file names.
* Otherwise set the remembered file name to the first argument
* file name so the "recover" initial command will find it.
*/
if (recov) {
if (ac == 0) {
die++;
setrupt();
execl(EXRECOVER, "exrecover", "-r", NULL);
filioerr(EXRECOVER);
exit(1);
}
CP(savedfile, *av);
av++, ac--;
}
/*
* Initialize the argument list.
*/
argv0 = av;
argc0 = ac;
args0 = av[0];
erewind();
/*
* Initialize a temporary file (buffer) and
* set up terminal environment. Read user startup commands.
*/
init();
if (setexit() == 0) {
setrupt();
intty = isatty(0);
if (fast || !intty)
setterm("dumb");
else {
gettmode();
if ((cp = getenv("TERM")) != 0)
setterm(cp);
if ((cp = getenv("HOME")) != 0)
source(strcat(strcpy(genbuf, cp), "/.exrc"), 1);
}
}
/*
* Initial processing. Handle tag, recover, and file argument
* implied next commands. If going in as 'vi', then don't do
* anything, just set initev so we will do it later (from within
* visual).
*/
if (setexit() == 0) {
if (recov)
globp = "recover";
else if (itag)
globp = ivis ? "tag" : "tag|p";
else if (argc)
globp = "next";
if (ivis)
initev = globp;
else if (globp) {
inglobal = 1;
commands(1, 1);
inglobal = 0;
}
}
/*
* Vi command... go into visual.
* Strange... everything in vi usually happens
* before we ever "start".
*/
if (ivis) {
/*
* Don't have to be upward compatible with stupidity
* of starting editing at line $.
*/
if (dol > zero)
dot = one;
globp = "visual";
if (setexit() == 0)
commands(1, 1);
}
/*
* Clear out trash in state accumulated by startup,
* and then do the main command loop for a normal edit.
* If you quit out of a 'vi' command by doing Q or ^\,
* you also fall through to here.
*/
ungetchar(0);
globp = 0;
initev = 0;
setlastchar('\n');
setexit();
commands(0, 0);
cleanup(1);
return 0;
}
/*
* Parse an address.
* Just about any sequence of address characters is legal.
*
* If you are tricky you can use this routine and the = command
* to do simple addition and subtraction of cardinals less
* than the number of lines in the file.
*/
line *
address(char *inputline)
{
register line *addr;
register int offset, c;
short lastsign;
bigmove = 0;
lastsign = 0;
offset = 0;
addr = 0;
for (;;) {
if (isdigit(peekcd())) {
if (addr == 0) {
addr = zero;
bigmove = 1;
}
loc1 = 0;
addr += offset;
offset = getnum();
if (lastsign >= 0)
addr += offset;
else
addr -= offset;
lastsign = 0;
offset = 0;
}
switch (c = getcd()) {
case '?':
case '/':
case '$':
case '\'':
case '\\':
bigmove++;
case '.':
if (addr || offset)
error("Badly formed address");
}
offset += lastsign;
lastsign = 0;
switch (c) {
case ' ':
case '\t':
continue;
case '+':
lastsign = 1;
if (addr == 0)
addr = dot;
continue;
case '^':
case '-':
lastsign = -1;
if (addr == 0)
addr = dot;
continue;
case '\\':
case '?':
case '/':
c = compile(c, 1);
notempty();
savere(scanre);
addr = dot;
if (inputline && execute(0, dot)) {
if (c == '/') {
while (loc1 <= inputline) {
if (loc1 == loc2)
loc2++;
if (!execute(1, NULL))
goto nope;
}
break;
} else if (loc1 < inputline) {
char *last;
doques:
do {
last = loc1;
if (loc1 == loc2)
loc2++;
if (!execute(1, NULL))
break;
} while (loc1 < inputline);
loc1 = last;
break;
}
}
nope:
for (;;) {
if (c == '/') {
addr++;
if (addr > dol) {
if (value(WRAPSCAN) == 0)
error("No match to BOTTOM|Address search hit BOTTOM without matching pattern");
addr = zero;
}
} else {
addr--;
if (addr < zero) {
if (value(WRAPSCAN) == 0)
error("No match to TOP|Address search hit TOP without matching pattern");
addr = dol;
}
}
if (execute(0, addr)) {
if (inputline && c == '?') {
inputline = &linebuf[LBSIZE];
goto doques;
}
break;
}
if (addr == dot)
error("Fail|Pattern not found");
}
continue;
case '$':
addr = dol;
continue;
case '.':
addr = dot;
continue;
case '\'':
c = markreg(ex_getchar());
if (c == 0)
error("Marks are ' and a-z");
addr = getmark(c);
if (addr == 0)
error("Undefined mark@referenced");
break;
default:
ungetchar(c);
if (offset) {
if (addr == 0)
addr = dot;
addr += offset;
loc1 = 0;
}
if (addr == 0) {
bigmove = 0;
return (0);
}
if (addr != zero)
notempty();
addr += lastsign;
if (addr < zero)
error("Negative address@- first buffer line is 1");
if (addr > dol)
error("Not that many lines@in buffer");
return (addr);
}
}
}
