/*
* v_key --
* Return the next event.
*/
static gcret_t
v_key(
SCR *sp,
int command_events,
EVENT *evp,
u_int32_t ec_flags)
{
u_int32_t quote;
for (quote = 0;;) {
if (v_event_get(sp, evp, 0, ec_flags | quote))
return (GC_FATAL);
quote = 0;
switch (evp->e_event) {
case E_CHARACTER:
/*
* !!!
* Historically, ^V was ignored in the command stream,
* although it had a useful side-effect of interrupting
* mappings. Adding a quoting bit to the call probably
* extends historic practice, but it feels right.
*/
if (evp->e_value == K_VLNEXT) {
quote = EC_QUOTED;
break;
}
return (GC_OK);
case E_ERR:
case E_EOF:
return (GC_FATAL);
case E_INTERRUPT:
/*
* !!!
* Historically, vi beeped on command level interrupts.
*
* Historically, vi exited to ex mode if no file was
* named on the command line, and two interrupts were
* generated in a row. (Just figured you might want
* to know that.)
*/
(void)sp->gp->scr_bell(sp);
return (GC_INTERRUPT);
case E_REPAINT:
if (vs_repaint(sp, evp))
return (GC_FATAL);
break;
case E_WRESIZE:
return (GC_ERR);
/* FALLTHROUGH */
default:
v_event_err(sp, evp);
return (GC_ERR);
}
}
/* NOTREACHED */
}
/*
* ex_txt --
* Get lines from the terminal for ex.
*
* PUBLIC: int ex_txt(SCR *, TEXTH *, ARG_CHAR_T, u_int32_t);
*/
int
ex_txt(SCR *sp, TEXTH *tiqh, ARG_CHAR_T prompt, u_int32_t flags)
{
EVENT ev;
GS *gp;
TEXT ait, *ntp, *tp;
carat_t carat_st;
size_t cnt;
int rval;
int nochange;
rval = 0;
/*
* Get a TEXT structure with some initial buffer space, reusing the
* last one if it's big enough. (All TEXT bookkeeping fields default
* to 0 -- text_init() handles this.)
*/
if (!TAILQ_EMPTY(tiqh)) {
tp = TAILQ_FIRST(tiqh);
if (TAILQ_NEXT(tp, q) != NULL || tp->lb_len < 32) {
text_lfree(tiqh);
goto newtp;
}
tp->len = 0;
} else {
newtp: if ((tp = text_init(sp, NULL, 0, 32)) == NULL)
goto err;
TAILQ_INSERT_HEAD(tiqh, tp, q);
}
/* Set the starting line number. */
tp->lno = sp->lno + 1;
/*
* If it's a terminal, set up autoindent, put out the prompt, and
* set it up so we know we were suspended. Otherwise, turn off
* the autoindent flag, as that requires less special casing below.
*
* XXX
* Historic practice is that ^Z suspended command mode (but, because
* it ran in cooked mode, it was unaffected by the autowrite option.)
* On restart, any "current" input was discarded, whether in insert
* mode or not, and ex was in command mode. This code matches historic
* practice, but not 'cause it's easier.
*/
gp = sp->gp;
if (F_ISSET(gp, G_SCRIPTED))
LF_CLR(TXT_AUTOINDENT);
else {
if (LF_ISSET(TXT_AUTOINDENT)) {
LF_SET(TXT_EOFCHAR);
if (v_txt_auto(sp, sp->lno, NULL, 0, tp))
goto err;
}
txt_prompt(sp, tp, prompt, flags);
}
for (carat_st = C_NOTSET, nochange = 0;;) {
if (v_event_get(sp, &ev, 0, 0))
goto err;
/* Deal with all non-character events. */
switch (ev.e_event) {
case E_CHARACTER:
break;
case E_ERR:
goto err;
case E_REPAINT:
case E_WRESIZE:
continue;
case E_EOF:
rval = 1;
/* FALLTHROUGH */
case E_INTERRUPT:
/*
* Handle EOF/SIGINT events by discarding partially
* entered text and returning. EOF returns failure,
* E_INTERRUPT returns success.
*/
goto notlast;
default:
v_event_err(sp, &ev);
goto notlast;
}
/*
* Deal with character events.
*
* Check to see if the character fits into the input buffer.
* (Use tp->len, ignore overwrite and non-printable chars.)
*/
BINC_GOTOW(sp, tp->lb, tp->lb_len, tp->len + 1);
switch (ev.e_value) {
case K_CR:
/*
* !!!
* Historically, <carriage-return>'s in the command
* weren't special, so the ex parser would return an
* unknown command error message. However, if they
* terminated the command if they were in a map. I'm
* pretty sure this still isn't right, but it handles
* what I've seen so far.
*/
if (!F_ISSET(&ev.e_ch, CH_MAPPED))
goto ins_ch;
/* FALLTHROUGH */
case K_NL:
/*
* '\' can escape <carriage-return>/<newline>. We
* don't discard the backslash because we need it
* to get the <newline> through the ex parser.
*/
if (LF_ISSET(TXT_BACKSLASH) &&
tp->len != 0 && tp->lb[tp->len - 1] == '\\')
goto ins_ch;
/*
* CR returns from the ex command line.
*
* XXX
* Terminate with a nul, needed by filter.
*/
if (LF_ISSET(TXT_CR)) {
tp->lb[tp->len] = '\0';
goto done;
}
/*
* '.' may terminate text input mode; free the current
* TEXT.
*/
if (LF_ISSET(TXT_DOTTERM) && tp->len == tp->ai + 1 &&
tp->lb[tp->len - 1] == '.') {
notlast: TAILQ_REMOVE(tiqh, tp, q);
text_free(tp);
goto done;
}
/* Set up bookkeeping for the new line. */
if ((ntp = text_init(sp, NULL, 0, 32)) == NULL)
goto err;
ntp->lno = tp->lno + 1;
/*
* Reset the autoindent line value. 0^D keeps the ai
* line from changing, ^D changes the level, even if
* there were no characters in the old line. Note, if
* using the current tp structure, use the cursor as
* the length, the autoindent characters may have been
* erased.
*/
if (LF_ISSET(TXT_AUTOINDENT)) {
if (nochange) {
nochange = 0;
if (v_txt_auto(sp,
OOBLNO, &ait, ait.ai, ntp))
goto err;
free(ait.lb);
} else
if (v_txt_auto(sp,
OOBLNO, tp, tp->len, ntp))
goto err;
carat_st = C_NOTSET;
}
txt_prompt(sp, ntp, prompt, flags);
/*
* Swap old and new TEXT's, and insert the new TEXT
* into the queue.
*/
tp = ntp;
TAILQ_INSERT_TAIL(tiqh, tp, q);
break;
case K_CARAT: /* Delete autoindent chars. */
if (tp->len <= tp->ai && LF_ISSET(TXT_AUTOINDENT))
carat_st = C_CARATSET;
goto ins_ch;
case K_ZERO: /* Delete autoindent chars. */
if (tp->len <= tp->ai && LF_ISSET(TXT_AUTOINDENT))
carat_st = C_ZEROSET;
goto ins_ch;
case K_CNTRLD: /* Delete autoindent char. */
/*
* !!!
* Historically, the ^D command took (but then ignored)
* a count. For simplicity, we don't return it unless
* it's the first character entered. The check for len
* equal to 0 is okay, TXT_AUTOINDENT won't be set.
*/
if (LF_ISSET(TXT_CNTRLD)) {
for (cnt = 0; cnt < tp->len; ++cnt)
if (!isblank(tp->lb[cnt]))
break;
if (cnt == tp->len) {
tp->len = 1;
tp->lb[0] = ev.e_c;
tp->lb[1] = '\0';
/*
* Put out a line separator, in case
* the command fails.
*/
(void)putchar('\n');
goto done;
}
}
/*
* POSIX 1003.1b-1993, paragraph 7.1.1.9, states that
* the EOF characters are discarded if there are other
* characters to process in the line, i.e. if the EOF
* is not the first character in the line. For this
* reason, historic ex discarded the EOF characters,
* even if occurring in the middle of the input line.
* We match that historic practice.
*
* !!!
* The test for discarding in the middle of the line is
* done in the switch, because the CARAT forms are N+1,
* not N.
*
* !!!
* There's considerable magic to make the terminal code
* return the EOF character at all. See that code for
* details.
*/
if (!LF_ISSET(TXT_AUTOINDENT) || tp->len == 0)
continue;
switch (carat_st) {
case C_CARATSET: /* ^^D */
if (tp->len > tp->ai + 1)
continue;
/* Save the ai string for later. */
ait.lb = NULL;
ait.lb_len = 0;
BINC_GOTOW(sp, ait.lb, ait.lb_len, tp->ai);
MEMCPY(ait.lb, tp->lb, tp->ai);
ait.ai = ait.len = tp->ai;
carat_st = C_NOTSET;
nochange = 1;
goto leftmargin;
case C_ZEROSET: /* 0^D */
if (tp->len > tp->ai + 1)
continue;
carat_st = C_NOTSET;
leftmargin: (void)gp->scr_ex_adjust(sp, EX_TERM_CE);
tp->ai = tp->len = 0;
break;
case C_NOTSET: /* ^D */
if (tp->len > tp->ai)
continue;
if (txt_dent(sp, tp))
goto err;
break;
default:
abort();
}
/* Clear and redisplay the line. */
(void)gp->scr_ex_adjust(sp, EX_TERM_CE);
txt_prompt(sp, tp, prompt, flags);
break;
default:
/*
* See the TXT_BEAUTIFY comment in vi/v_txt_ev.c.
*
* Silently eliminate any iscntrl() character that was
* not already handled specially, except for <tab> and
* <ff>.
*/
ins_ch: if (LF_ISSET(TXT_BEAUTIFY) && ISCNTRL(ev.e_c) &&
ev.e_value != K_FORMFEED && ev.e_value != K_TAB)
break;
tp->lb[tp->len++] = ev.e_c;
break;
}
}
/* NOTREACHED */
done: return (rval);
err:
alloc_err:
return (1);
}
/*
* v_replace -- [count]r<char>
*
* !!!
* The r command in historic vi was almost beautiful in its badness. For
* example, "r<erase>" and "r<word erase>" beeped the terminal and deleted
* a single character. "Nr<carriage return>", where N was greater than 1,
* inserted a single carriage return. "r<escape>" did cancel the command,
* but "r<literal><escape>" erased a single character. To enter a literal
* <literal> character, it required three <literal> characters after the
* command. This may not be right, but at least it's not insane.
*
* PUBLIC: int v_replace __P((SCR *, VICMD *));
*/
int
v_replace(SCR *sp, VICMD *vp)
{
EVENT ev;
VI_PRIVATE *vip;
TEXT *tp;
size_t blen, len;
u_long cnt;
int quote, rval;
CHAR_T *bp;
CHAR_T *p;
vip = VIP(sp);
/*
* If the line doesn't exist, or it's empty, replacement isn't
* allowed. It's not hard to implement, but:
*
* 1: It's historic practice (vi beeped before the replacement
* character was even entered).
* 2: For consistency, this change would require that the more
* general case, "Nr", when the user is < N characters from
* the end of the line, also work, which would be a bit odd.
* 3: Replacing with a <newline> has somewhat odd semantics.
*/
if (db_get(sp, vp->m_start.lno, DBG_FATAL, &p, &len))
return (1);
if (len == 0) {
msgq(sp, M_BERR, "186|No characters to replace");
return (1);
}
/*
* Figure out how many characters to be replace. For no particular
* reason (other than that the semantics of replacing the newline
* are confusing) only permit the replacement of the characters in
* the current line. I suppose we could append replacement characters
* to the line, but I see no compelling reason to do so. Check this
* before we get the character to match historic practice, where Nr
* failed immediately if there were less than N characters from the
* cursor to the end of the line.
*/
cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
vp->m_stop.lno = vp->m_start.lno;
vp->m_stop.cno = vp->m_start.cno + cnt - 1;
if (vp->m_stop.cno > len - 1) {
v_eol(sp, &vp->m_start);
return (1);
}
/*
* If it's not a repeat, reset the current mode and get a replacement
* character.
*/
quote = 0;
if (!F_ISSET(vp, VC_ISDOT)) {
sp->showmode = SM_REPLACE;
if (vs_refresh(sp, 0))
return (1);
next: if (v_event_get(sp, &ev, 0, 0))
return (1);
switch (ev.e_event) {
case E_CHARACTER:
/*
* <literal_next> means escape the next character.
* <escape> means they changed their minds.
*/
if (!quote) {
if (ev.e_value == K_VLNEXT) {
quote = 1;
goto next;
}
if (ev.e_value == K_ESCAPE)
return (0);
}
vip->rlast = ev.e_c;
vip->rvalue = ev.e_value;
break;
case E_ERR:
case E_EOF:
F_SET(sp, SC_EXIT_FORCE);
return (1);
case E_INTERRUPT:
/* <interrupt> means they changed their minds. */
return (0);
case E_WRESIZE:
/* <resize> interrupts the input mode. */
v_emsg(sp, NULL, VIM_WRESIZE);
return (0);
case E_REPAINT:
if (vs_repaint(sp, &ev))
return (1);
goto next;
default:
v_event_err(sp, &ev);
return (0);
}
}
/* Copy the line. */
GET_SPACE_RETW(sp, bp, blen, len);
MEMMOVE(bp, p, len);
p = bp;
/*
* Versions of nvi before 1.57 created N new lines when they replaced
* N characters with <carriage-return> or <newline> characters. This
* is different from the historic vi, which replaced N characters with
* a single new line. Users complained, so we match historic practice.
*/
if ((!quote && vip->rvalue == K_CR) || vip->rvalue == K_NL) {
/* Set return line. */
vp->m_stop.lno = vp->m_start.lno + 1;
vp->m_stop.cno = 0;
/* The first part of the current line. */
if (db_set(sp, vp->m_start.lno, p, vp->m_start.cno))
goto err_ret;
/*
* The rest of the current line. And, of course, now it gets
* tricky. If there are characters left in the line and if
* the autoindent edit option is set, white space after the
* replaced character is discarded, autoindent is applied, and
* the cursor moves to the last indent character.
*/
p += vp->m_start.cno + cnt;
len -= vp->m_start.cno + cnt;
if (len != 0 && O_ISSET(sp, O_AUTOINDENT))
for (; len && isblank(*p); --len, ++p);
if ((tp = text_init(sp, p, len, len)) == NULL)
goto err_ret;
if (len != 0 && O_ISSET(sp, O_AUTOINDENT)) {
if (v_txt_auto(sp, vp->m_start.lno, NULL, 0, tp))
goto err_ret;
vp->m_stop.cno = tp->ai ? tp->ai - 1 : 0;
} else
vp->m_stop.cno = 0;
vp->m_stop.cno = tp->ai ? tp->ai - 1 : 0;
if (db_append(sp, 1, vp->m_start.lno, tp->lb, tp->len))
err_ret: rval = 1;
else {
text_free(tp);
rval = 0;
}
} else {
STRSET(bp + vp->m_start.cno, vip->rlast, cnt);
rval = db_set(sp, vp->m_start.lno, bp, len);
}
FREE_SPACEW(sp, bp, blen);
vp->m_final = vp->m_stop;
return (rval);
}
static int
s(SCR *sp, EXCMD *cmdp, char *s, regex_t *re, u_int flags)
{
EVENT ev;
MARK from, to;
TEXTH tiq;
recno_t elno, lno, slno;
regmatch_t match[10];
size_t blen, cnt, last, lbclen, lblen, len, llen;
size_t offset, saved_offset, scno;
int lflag, nflag, pflag, rflag;
int didsub, do_eol_match, eflags, empty_ok, eval;
int linechanged, matched, quit, rval;
unsigned long ul;
char *bp, *lb;
NEEDFILE(sp, cmdp);
slno = sp->lno;
scno = sp->cno;
/*
* !!!
* Historically, the 'g' and 'c' suffices were always toggled as flags,
* so ":s/A/B/" was the same as ":s/A/B/ccgg". If O_EDCOMPATIBLE was
* not set, they were initialized to 0 for all substitute commands. If
* O_EDCOMPATIBLE was set, they were initialized to 0 only if the user
* specified substitute/replacement patterns (see ex_s()).
*/
if (!O_ISSET(sp, O_EDCOMPATIBLE))
sp->c_suffix = sp->g_suffix = 0;
/*
* Historic vi permitted the '#', 'l' and 'p' options in vi mode, but
* it only displayed the last change. I'd disallow them, but they are
* useful in combination with the [v]global commands. In the current
* model the problem is combining them with the 'c' flag -- the screen
* would have to flip back and forth between the confirm screen and the
* ex print screen, which would be pretty awful. We do display all
* changes, though, for what that's worth.
*
* !!!
* Historic vi was fairly strict about the order of "options", the
* count, and "flags". I'm somewhat fuzzy on the difference between
* options and flags, anyway, so this is a simpler approach, and we
* just take it them in whatever order the user gives them. (The ex
* usage statement doesn't reflect this.)
*/
lflag = nflag = pflag = rflag = 0;
if (s == NULL)
goto noargs;
for (lno = OOBLNO; *s != '\0'; ++s)
switch (*s) {
case ' ':
case '\t':
continue;
case '+':
++cmdp->flagoff;
break;
case '-':
--cmdp->flagoff;
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
if (lno != OOBLNO)
goto usage;
errno = 0;
if ((ul = strtoul(s, &s, 10)) >= UINT_MAX)
errno = ERANGE;
if (*s == '\0') /* Loop increment correction. */
--s;
if (errno == ERANGE) {
if (ul >= UINT_MAX)
msgq(sp, M_ERR, "Count overflow");
else
msgq(sp, M_SYSERR, NULL);
return (1);
}
lno = (recno_t)ul;
/*
* In historic vi, the count was inclusive from the
* second address.
*/
cmdp->addr1.lno = cmdp->addr2.lno;
cmdp->addr2.lno += lno - 1;
if (!db_exist(sp, cmdp->addr2.lno) &&
db_last(sp, &cmdp->addr2.lno))
return (1);
break;
case '#':
nflag = 1;
break;
case 'c':
sp->c_suffix = !sp->c_suffix;
/* Ex text structure initialization. */
if (F_ISSET(sp, SC_EX)) {
memset(&tiq, 0, sizeof(TEXTH));
TAILQ_INIT(&tiq);
}
break;
case 'g':
sp->g_suffix = !sp->g_suffix;
break;
case 'l':
lflag = 1;
break;
case 'p':
pflag = 1;
break;
case 'r':
if (LF_ISSET(SUB_FIRST)) {
msgq(sp, M_ERR,
"Regular expression specified; r flag meaningless");
return (1);
}
if (!F_ISSET(sp, SC_RE_SEARCH)) {
ex_emsg(sp, NULL, EXM_NOPREVRE);
return (1);
}
rflag = 1;
re = &sp->re_c;
break;
default:
goto usage;
}
if (*s != '\0' || (!rflag && LF_ISSET(SUB_MUSTSETR))) {
usage: ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
return (1);
}
noargs: if (F_ISSET(sp, SC_VI) && sp->c_suffix && (lflag || nflag || pflag)) {
msgq(sp, M_ERR,
"The #, l and p flags may not be combined with the c flag in vi mode");
return (1);
}
/*
* bp: if interactive, line cache
* blen: if interactive, line cache length
* lb: build buffer pointer.
* lbclen: current length of built buffer.
* lblen; length of build buffer.
*/
bp = lb = NULL;
blen = lbclen = lblen = 0;
/* For each line... */
for (matched = quit = 0, lno = cmdp->addr1.lno,
elno = cmdp->addr2.lno; !quit && lno <= elno; ++lno) {
/* Someone's unhappy, time to stop. */
if (INTERRUPTED(sp))
break;
/* Get the line. */
if (db_get(sp, lno, DBG_FATAL, &s, &llen))
goto err;
/*
* Make a local copy if doing confirmation -- when calling
* the confirm routine we're likely to lose the cached copy.
*/
if (sp->c_suffix) {
if (bp == NULL) {
GET_SPACE_RET(sp, bp, blen, llen);
} else
ADD_SPACE_RET(sp, bp, blen, llen);
memcpy(bp, s, llen);
s = bp;
}
/* Start searching from the beginning. */
offset = 0;
len = llen;
/* Reset the build buffer offset. */
lbclen = 0;
/* Reset empty match flag. */
empty_ok = 1;
/*
* We don't want to have to do a setline if the line didn't
* change -- keep track of whether or not this line changed.
* If doing confirmations, don't want to keep setting the
* line if change is refused -- keep track of substitutions.
*/
didsub = linechanged = 0;
/* New line, do an EOL match. */
do_eol_match = 1;
/* It's not nul terminated, but we pretend it is. */
eflags = REG_STARTEND;
/*
* The search area is from s + offset to the EOL.
*
* Generally, match[0].rm_so is the offset of the start
* of the match from the start of the search, and offset
* is the offset of the start of the last search.
*/
nextmatch: match[0].rm_so = 0;
match[0].rm_eo = len;
/* Get the next match. */
eval = regexec(re, (char *)s + offset, 10, match, eflags);
/*
* There wasn't a match or if there was an error, deal with
* it. If there was a previous match in this line, resolve
* the changes into the database. Otherwise, just move on.
*/
if (eval == REG_NOMATCH)
goto endmatch;
if (eval != 0) {
re_error(sp, eval, re);
goto err;
}
matched = 1;
/* Only the first search can match an anchored expression. */
eflags |= REG_NOTBOL;
/*
* !!!
* It's possible to match 0-length strings -- for example, the
* command s;a*;X;, when matched against the string "aabb" will
* result in "XbXbX", i.e. the matches are "aa", the space
* between the b's and the space between the b's and the end of
* the string. There is a similar space between the beginning
* of the string and the a's. The rule that we use (because vi
* historically used it) is that any 0-length match, occurring
* immediately after a match, is ignored. Otherwise, the above
* example would have resulted in "XXbXbX". Another example is
* incorrectly using " *" to replace groups of spaces with one
* space.
*
* The way we do this is that if we just had a successful match,
* the starting offset does not skip characters, and the match
* is empty, ignore the match and move forward. If there's no
* more characters in the string, we were attempting to match
* after the last character, so quit.
*/
if (!empty_ok && match[0].rm_so == 0 && match[0].rm_eo == 0) {
empty_ok = 1;
if (len == 0)
goto endmatch;
BUILD(sp, s + offset, 1)
++offset;
--len;
goto nextmatch;
}
/* Confirm change. */
if (sp->c_suffix) {
/*
* Set the cursor position for confirmation. Note,
* if we matched on a '$', the cursor may be past
* the end of line.
*/
from.lno = to.lno = lno;
from.cno = match[0].rm_so + offset;
to.cno = match[0].rm_eo + offset;
/*
* Both ex and vi have to correct for a change before
* the first character in the line.
*/
if (llen == 0)
from.cno = to.cno = 0;
if (F_ISSET(sp, SC_VI)) {
/*
* Only vi has to correct for a change after
* the last character in the line.
*
* XXX
* It would be nice to change the vi code so
* that we could display a cursor past EOL.
*/
if (to.cno >= llen)
to.cno = llen - 1;
if (from.cno >= llen)
from.cno = llen - 1;
sp->lno = from.lno;
sp->cno = from.cno;
if (vs_refresh(sp, 1))
goto err;
vs_update(sp, "Confirm change? [n]", NULL);
if (v_event_get(sp, &ev, 0, 0))
goto err;
switch (ev.e_event) {
case E_CHARACTER:
break;
case E_EOF:
case E_ERR:
case E_INTERRUPT:
goto lquit;
default:
v_event_err(sp, &ev);
goto lquit;
}
} else {
if (ex_print(sp, cmdp, &from, &to, 0) ||
ex_scprint(sp, &from, &to))
goto lquit;
if (ex_txt(sp, &tiq, 0, TXT_CR))
goto err;
ev.e_c = TAILQ_FIRST(&tiq)->lb[0];
}
switch (ev.e_c) {
case CH_YES:
break;
default:
case CH_NO:
didsub = 0;
BUILD(sp, s +offset, match[0].rm_eo);
goto skip;
case CH_QUIT:
/* Set the quit/interrupted flags. */
lquit: quit = 1;
F_SET(sp->gp, G_INTERRUPTED);
/*
* Resolve any changes, then return to (and
* exit from) the main loop.
*/
goto endmatch;
}
}
/*
* Set the cursor to the last position changed, converting
* from 1-based to 0-based.
*/
sp->lno = lno;
sp->cno = match[0].rm_so;
/* Copy the bytes before the match into the build buffer. */
BUILD(sp, s + offset, match[0].rm_so);
/* Substitute the matching bytes. */
didsub = 1;
if (re_sub(sp, s + offset, &lb, &lbclen, &lblen, match))
goto err;
/* Set the change flag so we know this line was modified. */
linechanged = 1;
/* Move past the matched bytes. */
skip: offset += match[0].rm_eo;
len -= match[0].rm_eo;
/* A match cannot be followed by an empty pattern. */
empty_ok = 0;
/*
* If doing a global change with confirmation, we have to
* update the screen. The basic idea is to store the line
* so the screen update routines can find it, and restart.
*/
if (didsub && sp->c_suffix && sp->g_suffix) {
/*
* The new search offset will be the end of the
* modified line.
*/
saved_offset = lbclen;
/* Copy the rest of the line. */
if (len)
BUILD(sp, s + offset, len)
/* Set the new offset. */
offset = saved_offset;
/* Store inserted lines, adjusting the build buffer. */
last = 0;
if (sp->newl_cnt) {
for (cnt = 0;
cnt < sp->newl_cnt; ++cnt, ++lno, ++elno) {
if (db_insert(sp, lno,
lb + last, sp->newl[cnt] - last))
goto err;
last = sp->newl[cnt] + 1;
++sp->rptlines[L_ADDED];
}
lbclen -= last;
offset -= last;
sp->newl_cnt = 0;
}
/* Store and retrieve the line. */
if (db_set(sp, lno, lb + last, lbclen))
goto err;
if (db_get(sp, lno, DBG_FATAL, &s, &llen))
goto err;
ADD_SPACE_RET(sp, bp, blen, llen)
memcpy(bp, s, llen);
s = bp;
len = llen - offset;
/* Restart the build. */
lbclen = 0;
BUILD(sp, s, offset);
/*
* If we haven't already done the after-the-string
* match, do one. Set REG_NOTEOL so the '$' pattern
* only matches once.
*/
if (!do_eol_match)
goto endmatch;
if (offset == len) {
do_eol_match = 0;
eflags |= REG_NOTEOL;
}
goto nextmatch;
}
/*
* If it's a global:
*
* If at the end of the string, do a test for the after
* the string match. Set REG_NOTEOL so the '$' pattern
* only matches once.
*/
if (sp->g_suffix && do_eol_match) {
if (len == 0) {
do_eol_match = 0;
eflags |= REG_NOTEOL;
}
goto nextmatch;
}
endmatch: if (!linechanged)
continue;
/* Copy any remaining bytes into the build buffer. */
if (len)
BUILD(sp, s + offset, len)
/* Store inserted lines, adjusting the build buffer. */
last = 0;
if (sp->newl_cnt) {
for (cnt = 0;
cnt < sp->newl_cnt; ++cnt, ++lno, ++elno) {
if (db_insert(sp,
lno, lb + last, sp->newl[cnt] - last))
goto err;
last = sp->newl[cnt] + 1;
++sp->rptlines[L_ADDED];
}
lbclen -= last;
sp->newl_cnt = 0;
}
/* Store the changed line. */
if (db_set(sp, lno, lb + last, lbclen))
goto err;
/* Update changed line counter. */
if (sp->rptlchange != lno) {
sp->rptlchange = lno;
++sp->rptlines[L_CHANGED];
}
/*
* !!!
* Display as necessary. Historic practice is to only
* display the last line of a line split into multiple
* lines.
*/
if (lflag || nflag || pflag) {
from.lno = to.lno = lno;
from.cno = to.cno = 0;
if (lflag)
(void)ex_print(sp, cmdp, &from, &to, E_C_LIST);
if (nflag)
(void)ex_print(sp, cmdp, &from, &to, E_C_HASH);
if (pflag)
(void)ex_print(sp, cmdp, &from, &to, E_C_PRINT);
}
}
/*
* !!!
* Historically, vi attempted to leave the cursor at the same place if
* the substitution was done at the current cursor position. Otherwise
* it moved it to the first non-blank of the last line changed. There
* were some problems: for example, :s/$/foo/ with the cursor on the
* last character of the line left the cursor on the last character, or
* the & command with multiple occurrences of the matching string in the
* line usually left the cursor in a fairly random position.
*
* We try to do the same thing, with the exception that if the user is
* doing substitution with confirmation, we move to the last line about
* which the user was consulted, as opposed to the last line that they
* actually changed. This prevents a screen flash if the user doesn't
* change many of the possible lines.
*/
if (!sp->c_suffix && (sp->lno != slno || sp->cno != scno)) {
sp->cno = 0;
(void)nonblank(sp, sp->lno, &sp->cno);
}
/*
* If not in a global command, and nothing matched, say so.
* Else, if none of the lines displayed, put something up.
*/
rval = 0;
if (!matched) {
if (!F_ISSET(sp, SC_EX_GLOBAL)) {
msgq(sp, M_ERR, "No match found");
goto err;
}
} else if (!lflag && !nflag && !pflag)
F_SET(cmdp, E_AUTOPRINT);
if (0) {
err: rval = 1;
}
if (bp != NULL)
FREE_SPACE(sp, bp, blen);
if (lb != NULL)
free(lb);
return (rval);
}
/*
* v_cmd --
* Get a vi command.
*/
static gcret_t
v_cmd(SCR *sp, VICMD *dp, VICMD *vp, VICMD *ismotion, int *comcountp, int *mappedp)
/* Previous key if getting motion component. */
{
enum { COMMANDMODE, ISPARTIAL, NOTPARTIAL } cpart;
ARG_CHAR_T key;
VIKEYS const *kp;
gcret_t gcret;
u_int flags;
const char *s;
/*
* Get an event command or a key. Event commands are simple, and
* don't have any additional information.
*/
cpart = ismotion == NULL ? COMMANDMODE : ISPARTIAL;
gcret = v_key(sp, vp, 1, EC_MAPCOMMAND);
if (gcret != GC_OK) {
if (gcret != GC_EVENT)
return (gcret);
if (v_event(sp, vp))
return (GC_ERR);
if (ismotion != NULL && !F_ISSET(vp->kp, V_MOVE))
v_event_err(sp, &vp->ev);
return (GC_EVENT);
}
/*
* Keys are not simple. (Although vi's command structure less complex
* than ex (and don't think I'm not grateful!) The command syntax is:
*
* [count] [buffer] [count] key [[motion] | [buffer] [character]]
*
* and there are, of course, several special cases. The motion value
* is itself a vi command, with the syntax:
*
* [count] key [character]
*
* <escape> cancels partial commands, i.e. a command where at least
* one non-numeric character has been entered. Otherwise, it beeps
* the terminal.
*
* !!!
* POSIX 1003.2-1992 explicitly disallows cancelling commands where
* all that's been entered is a number, requiring that the terminal
* be alerted.
*/
if (vp->ev.e_value == K_ESCAPE)
goto esc;
/*
* Commands that are mapped are treated differently (e.g., they
* don't set the dot command. Pass that information back.
*/
if (FL_ISSET(vp->ev.e_flags, CH_MAPPED))
*mappedp = 1;
key = vp->ev.e_c;
if (ismotion == NULL)
cpart = NOTPARTIAL;
/* Pick up an optional buffer. */
if (key == '"') {
cpart = ISPARTIAL;
if (ismotion != NULL) {
v_emsg(sp, NULL, VIM_COMBUF);
return (GC_ERR);
}
KEY(vp->buffer, 0);
F_SET(vp, VC_BUFFER);
KEY(key, EC_MAPCOMMAND);
}
/*
* Pick up an optional count, where a leading 0 isn't a count, it's
* a command. When a count is specified, the dot command behaves
* differently, pass the information back.
*/
if (ISDIGIT(key) && key != '0') {
if (v_count(sp, vp, key, &vp->count))
return (GC_ERR);
F_SET(vp, VC_C1SET);
*comcountp = 1;
KEY(key, EC_MAPCOMMAND);
} else
*comcountp = 0;
/* Pick up optional buffer. */
if (key == '"') {
cpart = ISPARTIAL;
if (F_ISSET(vp, VC_BUFFER)) {
msgq(sp, M_ERR, "234|Only one buffer may be specified");
return (GC_ERR);
}
if (ismotion != NULL) {
v_emsg(sp, NULL, VIM_COMBUF);
return (GC_ERR);
}
KEY(vp->buffer, 0);
F_SET(vp, VC_BUFFER);
KEY(key, EC_MAPCOMMAND);
}
/* Check for an OOB command key. */
cpart = ISPARTIAL;
if (key > MAXVIKEY) {
v_emsg(sp, (const char *)KEY_NAME(sp, key), VIM_NOCOM);
return (GC_ERR);
}
kp = &vikeys[vp->key = key];
/*
* !!!
* Historically, D accepted and then ignored a count. Match it.
*/
if (vp->key == 'D' && F_ISSET(vp, VC_C1SET)) {
*comcountp = 0;
vp->count = 0;
F_CLR(vp, VC_C1SET);
}
/*
* There are several commands that we implement as aliases, both
* to match historic practice and to ensure consistency. Check
* for command aliases.
*/
if (kp->func == NULL && (kp = v_alias(sp, vp, kp)) == NULL)
return (GC_ERR);
/* The tildeop option makes the ~ command take a motion. */
if (key == '~' && O_ISSET(sp, O_TILDEOP))
kp = &tmotion;
vp->kp = kp;
/*
* Find the command. The only legal command with no underlying
* function is dot. It's historic practice that <escape> doesn't
* just erase the preceding number, it beeps the terminal as well.
* It's a common problem, so just beep the terminal unless verbose
* was set.
*/
if (kp->func == NULL) {
if (key != '.') {
v_emsg(sp, (const char *)KEY_NAME(sp, key),
vp->ev.e_value == K_ESCAPE ?
VIM_NOCOM_B : VIM_NOCOM);
return (GC_ERR);
}
/* If called for a motion command, stop now. */
if (dp == NULL)
goto usage;
/*
* !!!
* If a '.' is immediately entered after an undo command, we
* replay the log instead of redoing the last command. This
* is necessary because 'u' can't set the dot command -- see
* vi/v_undo.c:v_undo for details.
*/
if (VIP(sp)->u_ccnt == sp->ccnt) {
vp->kp = &vikeys['u'];
F_SET(vp, VC_ISDOT);
return (GC_OK);
}
/* Otherwise, a repeatable command must have been executed. */
if (!F_ISSET(dp, VC_ISDOT)) {
msgq(sp, M_ERR, "208|No command to repeat");
return (GC_ERR);
}
/* Set new count/buffer, if any, and return. */
if (F_ISSET(vp, VC_C1SET)) {
F_SET(dp, VC_C1SET);
dp->count = vp->count;
}
if (F_ISSET(vp, VC_BUFFER))
dp->buffer = vp->buffer;
*vp = *dp;
return (GC_OK);
}
/* Set the flags based on the command flags. */
flags = kp->flags;
/* Check for illegal count. */
if (F_ISSET(vp, VC_C1SET) && !LF_ISSET(V_CNT))
goto usage;
/* Illegal motion command. */
if (ismotion == NULL) {
/* Illegal buffer. */
if (!LF_ISSET(V_OBUF) && F_ISSET(vp, VC_BUFFER))
goto usage;
/* Required buffer. */
if (LF_ISSET(V_RBUF)) {
KEY(vp->buffer, 0);
F_SET(vp, VC_BUFFER);
}
}
/*
* Special case: '[', ']' and 'Z' commands. Doesn't the fact that
* the *single* characters don't mean anything but the *doubled*
* characters do, just frost your shorts?
*/
if (vp->key == '[' || vp->key == ']' || vp->key == 'Z') {
/*
* Historically, half entered [[, ]] or Z commands weren't
* cancelled by <escape>, the terminal was beeped instead.
* POSIX.2-1992 probably didn't notice, and requires that
* they be cancelled instead of beeping. Seems fine to me.
*
* Don't set the EC_MAPCOMMAND flag, apparently ] is a popular
* vi meta-character, and we don't want the user to wait while
* we time out a possible mapping. This *appears* to match
* historic vi practice, but with mapping characters, You Just
* Never Know.
*/
KEY(key, 0);
if (vp->key != key) {
usage: if (ismotion == NULL)
s = kp->usage;
else if (ismotion->key == '~' && O_ISSET(sp, O_TILDEOP))
s = tmotion.usage;
else
s = vikeys[ismotion->key].usage;
v_emsg(sp, s, VIM_USAGE);
return (GC_ERR);
}
}
/* Special case: 'z' command. */
if (vp->key == 'z') {
KEY(vp->character, 0);
if (ISDIGIT(vp->character)) {
if (v_count(sp, vp, vp->character, &vp->count2))
return (GC_ERR);
F_SET(vp, VC_C2SET);
KEY(vp->character, 0);
}
}
/*
* Commands that have motion components can be doubled to imply the
* current line.
*/
if (ismotion != NULL && ismotion->key != key && !LF_ISSET(V_MOVE)) {
msgq(sp, M_ERR, "210|%s may not be used as a motion command",
KEY_NAME(sp, key));
return (GC_ERR);
}
/* Pick up required trailing character. */
if (LF_ISSET(V_CHAR))
KEY(vp->character, 0);
/* Get any associated cursor word. */
if (F_ISSET(kp, V_KEYW) && v_curword(sp))
return (GC_ERR);
return (GC_OK);
esc: switch (cpart) {
case COMMANDMODE:
msgq(sp, M_BERR, "211|Already in command mode");
return (GC_ERR_NOFLUSH);
case ISPARTIAL:
break;
case NOTPARTIAL:
(void)sp->gp->scr_bell(sp);
break;
}
return (GC_ERR);
}
/*
* v_key --
* Return the next event.
*/
static gcret_t
v_key(SCR *sp, VICMD *vp, int events_ok, u_int32_t ec_flags)
{
EVENT *evp;
u_int32_t quote;
for (evp = &vp->ev, quote = 0;;) {
if (v_event_get(sp, evp, 0, ec_flags | quote))
return (GC_FATAL);
quote = 0;
switch (evp->e_event) {
case E_CHARACTER:
/*
* !!!
* Historically, ^V was ignored in the command stream,
* although it had a useful side-effect of interrupting
* mappings. Adding a quoting bit to the call probably
* extends historic practice, but it feels right.
*/
if (evp->e_value == K_VLNEXT) {
quote = EC_QUOTED;
break;
}
return (GC_OK);
case E_ERR:
case E_EOF:
return (GC_FATAL);
case E_INTERRUPT:
/*
* !!!
* Historically, vi beeped on command level interrupts.
*
* Historically, vi exited to ex mode if no file was
* named on the command line, and two interrupts were
* generated in a row. (I figured you might want to
* know that, just in case there's a quiz later.)
*/
(void)sp->gp->scr_bell(sp);
return (GC_INTERRUPT);
case E_REPAINT:
if (v_erepaint(sp, evp))
return (GC_FATAL);
break;
case E_WRESIZE:
/*
* !!!
* We don't do anything here, just return an error.
* The vi loop will return because of this, and then
* the main loop will realize that we had to restart
* the world and will call the vi loop again.
*/
return (GC_ERR);
case E_IPCOMMAND:
if (events_ok)
return (GC_EVENT);
/* FALLTHROUGH */
default:
v_event_err(sp, evp);
return (GC_ERR);
}
}
/* NOTREACHED */
}