| Current Path : /usr/src/contrib/nvi/common/ |
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| Current File : //usr/src/contrib/nvi/common/key.c |
/*-
* Copyright (c) 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1991, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)key.c 10.33 (Berkeley) 9/24/96";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "../vi/vi.h"
static int v_event_append __P((SCR *, EVENT *));
static int v_event_grow __P((SCR *, int));
static int v_key_cmp __P((const void *, const void *));
static void v_keyval __P((SCR *, int, scr_keyval_t));
static void v_sync __P((SCR *, int));
/*
* !!!
* Historic vi always used:
*
* ^D: autoindent deletion
* ^H: last character deletion
* ^W: last word deletion
* ^Q: quote the next character (if not used in flow control).
* ^V: quote the next character
*
* regardless of the user's choices for these characters. The user's erase
* and kill characters worked in addition to these characters. Nvi wires
* down the above characters, but in addition permits the VEOF, VERASE, VKILL
* and VWERASE characters described by the user's termios structure.
*
* Ex was not consistent with this scheme, as it historically ran in tty
* cooked mode. This meant that the scroll command and autoindent erase
* characters were mapped to the user's EOF character, and the character
* and word deletion characters were the user's tty character and word
* deletion characters. This implementation makes it all consistent, as
* described above for vi.
*
* !!!
* This means that all screens share a special key set.
*/
KEYLIST keylist[] = {
{K_BACKSLASH, '\\'}, /* \ */
{K_CARAT, '^'}, /* ^ */
{K_CNTRLD, '\004'}, /* ^D */
{K_CNTRLR, '\022'}, /* ^R */
{K_CNTRLT, '\024'}, /* ^T */
{K_CNTRLZ, '\032'}, /* ^Z */
{K_COLON, ':'}, /* : */
{K_CR, '\r'}, /* \r */
{K_ESCAPE, '\033'}, /* ^[ */
{K_FORMFEED, '\f'}, /* \f */
{K_HEXCHAR, '\030'}, /* ^X */
{K_NL, '\n'}, /* \n */
{K_RIGHTBRACE, '}'}, /* } */
{K_RIGHTPAREN, ')'}, /* ) */
{K_TAB, '\t'}, /* \t */
{K_VERASE, '\b'}, /* \b */
{K_VKILL, '\025'}, /* ^U */
{K_VLNEXT, '\021'}, /* ^Q */
{K_VLNEXT, '\026'}, /* ^V */
{K_VWERASE, '\027'}, /* ^W */
{K_ZERO, '0'}, /* 0 */
#define ADDITIONAL_CHARACTERS 4
{K_NOTUSED, 0}, /* VEOF, VERASE, VKILL, VWERASE */
{K_NOTUSED, 0},
{K_NOTUSED, 0},
{K_NOTUSED, 0},
};
static int nkeylist =
(sizeof(keylist) / sizeof(keylist[0])) - ADDITIONAL_CHARACTERS;
/*
* v_key_init --
* Initialize the special key lookup table.
*
* PUBLIC: int v_key_init __P((SCR *));
*/
int
v_key_init(sp)
SCR *sp;
{
CHAR_T ch;
GS *gp;
KEYLIST *kp;
int cnt;
gp = sp->gp;
/*
* XXX
* 8-bit only, for now. Recompilation should get you any 8-bit
* character set, as long as nul isn't a character.
*/
(void)setlocale(LC_ALL, "");
#if __linux__
/*
* In libc 4.5.26, setlocale(LC_ALL, ""), doesn't setup the table
* for ctype(3c) correctly. This bug is fixed in libc 4.6.x.
*
* This code works around this problem for libc 4.5.x users.
* Note that this code is harmless if you're using libc 4.6.x.
*/
(void)setlocale(LC_CTYPE, "");
#endif
v_key_ilookup(sp);
v_keyval(sp, K_CNTRLD, KEY_VEOF);
v_keyval(sp, K_VERASE, KEY_VERASE);
v_keyval(sp, K_VKILL, KEY_VKILL);
v_keyval(sp, K_VWERASE, KEY_VWERASE);
/* Sort the special key list. */
qsort(keylist, nkeylist, sizeof(keylist[0]), v_key_cmp);
/* Initialize the fast lookup table. */
for (gp->max_special = 0, kp = keylist, cnt = nkeylist; cnt--; ++kp) {
if (gp->max_special < kp->value)
gp->max_special = kp->value;
if (kp->ch <= MAX_FAST_KEY)
gp->special_key[kp->ch] = kp->value;
}
/* Find a non-printable character to use as a message separator. */
for (ch = 1; ch <= MAX_CHAR_T; ++ch)
if (!isprint(ch)) {
gp->noprint = ch;
break;
}
if (ch != gp->noprint) {
msgq(sp, M_ERR, "079|No non-printable character found");
return (1);
}
return (0);
}
/*
* v_keyval --
* Set key values.
*
* We've left some open slots in the keylist table, and if these values exist,
* we put them into place. Note, they may reset (or duplicate) values already
* in the table, so we check for that first.
*/
static void
v_keyval(sp, val, name)
SCR *sp;
int val;
scr_keyval_t name;
{
KEYLIST *kp;
CHAR_T ch;
int dne;
/* Get the key's value from the screen. */
if (sp->gp->scr_keyval(sp, name, &ch, &dne))
return;
if (dne)
return;
/* Check for duplication. */
for (kp = keylist; kp->value != K_NOTUSED; ++kp)
if (kp->ch == ch) {
kp->value = val;
return;
}
/* Add a new entry. */
if (kp->value == K_NOTUSED) {
keylist[nkeylist].ch = ch;
keylist[nkeylist].value = val;
++nkeylist;
}
}
/*
* v_key_ilookup --
* Build the fast-lookup key display array.
*
* PUBLIC: void v_key_ilookup __P((SCR *));
*/
void
v_key_ilookup(sp)
SCR *sp;
{
CHAR_T ch, *p, *t;
GS *gp;
size_t len;
for (gp = sp->gp, ch = 0; ch <= MAX_FAST_KEY; ++ch)
for (p = gp->cname[ch].name, t = v_key_name(sp, ch),
len = gp->cname[ch].len = sp->clen; len--;)
*p++ = *t++;
}
/*
* v_key_len --
* Return the length of the string that will display the key.
* This routine is the backup for the KEY_LEN() macro.
*
* PUBLIC: size_t v_key_len __P((SCR *, ARG_CHAR_T));
*/
size_t
v_key_len(sp, ch)
SCR *sp;
ARG_CHAR_T ch;
{
(void)v_key_name(sp, ch);
return (sp->clen);
}
/*
* v_key_name --
* Return the string that will display the key. This routine
* is the backup for the KEY_NAME() macro.
*
* PUBLIC: CHAR_T *v_key_name __P((SCR *, ARG_CHAR_T));
*/
CHAR_T *
v_key_name(sp, ach)
SCR *sp;
ARG_CHAR_T ach;
{
static const CHAR_T hexdigit[] = "0123456789abcdef";
static const CHAR_T octdigit[] = "01234567";
CHAR_T ch, *chp, mask;
size_t len;
int cnt, shift;
ch = ach;
/* See if the character was explicitly declared printable or not. */
if ((chp = O_STR(sp, O_PRINT)) != NULL)
for (; *chp != '\0'; ++chp)
if (*chp == ch)
goto pr;
if ((chp = O_STR(sp, O_NOPRINT)) != NULL)
for (; *chp != '\0'; ++chp)
if (*chp == ch)
goto nopr;
/*
* Historical (ARPA standard) mappings. Printable characters are left
* alone. Control characters less than 0x20 are represented as '^'
* followed by the character offset from the '@' character in the ASCII
* character set. Del (0x7f) is represented as '^' followed by '?'.
*
* XXX
* The following code depends on the current locale being identical to
* the ASCII map from 0x40 to 0x5f (since 0x1f + 0x40 == 0x5f). I'm
* told that this is a reasonable assumption...
*
* XXX
* This code will only work with CHAR_T's that are multiples of 8-bit
* bytes.
*
* XXX
* NB: There's an assumption here that all printable characters take
* up a single column on the screen. This is not always correct.
*/
if (isprint(ch)) {
pr: sp->cname[0] = ch;
len = 1;
goto done;
}
nopr: if (iscntrl(ch) && (ch < 0x20 || ch == 0x7f)) {
sp->cname[0] = '^';
sp->cname[1] = ch == 0x7f ? '?' : '@' + ch;
len = 2;
} else if (O_ISSET(sp, O_OCTAL)) {
#define BITS (sizeof(CHAR_T) * 8)
#define SHIFT (BITS - BITS % 3)
#define TOPMASK (BITS % 3 == 2 ? 3 : 1) << (BITS - BITS % 3)
sp->cname[0] = '\\';
sp->cname[1] = octdigit[(ch & TOPMASK) >> SHIFT];
shift = SHIFT - 3;
for (len = 2, mask = 7 << (SHIFT - 3),
cnt = BITS / 3; cnt-- > 0; mask >>= 3, shift -= 3)
sp->cname[len++] = octdigit[(ch & mask) >> shift];
} else {
sp->cname[0] = '\\';
sp->cname[1] = 'x';
for (len = 2, chp = (u_int8_t *)&ch,
cnt = sizeof(CHAR_T); cnt-- > 0; ++chp) {
sp->cname[len++] = hexdigit[(*chp & 0xf0) >> 4];
sp->cname[len++] = hexdigit[*chp & 0x0f];
}
}
done: sp->cname[sp->clen = len] = '\0';
return (sp->cname);
}
/*
* v_key_val --
* Fill in the value for a key. This routine is the backup
* for the KEY_VAL() macro.
*
* PUBLIC: int v_key_val __P((SCR *, ARG_CHAR_T));
*/
int
v_key_val(sp, ch)
SCR *sp;
ARG_CHAR_T ch;
{
KEYLIST k, *kp;
k.ch = ch;
kp = bsearch(&k, keylist, nkeylist, sizeof(keylist[0]), v_key_cmp);
return (kp == NULL ? K_NOTUSED : kp->value);
}
/*
* v_event_push --
* Push events/keys onto the front of the buffer.
*
* There is a single input buffer in ex/vi. Characters are put onto the
* end of the buffer by the terminal input routines, and pushed onto the
* front of the buffer by various other functions in ex/vi. Each key has
* an associated flag value, which indicates if it has already been quoted,
* and if it is the result of a mapping or an abbreviation.
*
* PUBLIC: int v_event_push __P((SCR *, EVENT *, CHAR_T *, size_t, u_int));
*/
int
v_event_push(sp, p_evp, p_s, nitems, flags)
SCR *sp;
EVENT *p_evp; /* Push event. */
CHAR_T *p_s; /* Push characters. */
size_t nitems; /* Number of items to push. */
u_int flags; /* CH_* flags. */
{
EVENT *evp;
GS *gp;
size_t total;
/* If we have room, stuff the items into the buffer. */
gp = sp->gp;
if (nitems <= gp->i_next ||
(gp->i_event != NULL && gp->i_cnt == 0 && nitems <= gp->i_nelem)) {
if (gp->i_cnt != 0)
gp->i_next -= nitems;
goto copy;
}
/*
* If there are currently items in the queue, shift them up,
* leaving some extra room. Get enough space plus a little
* extra.
*/
#define TERM_PUSH_SHIFT 30
total = gp->i_cnt + gp->i_next + nitems + TERM_PUSH_SHIFT;
if (total >= gp->i_nelem && v_event_grow(sp, MAX(total, 64)))
return (1);
if (gp->i_cnt)
MEMMOVE(gp->i_event + TERM_PUSH_SHIFT + nitems,
gp->i_event + gp->i_next, gp->i_cnt);
gp->i_next = TERM_PUSH_SHIFT;
/* Put the new items into the queue. */
copy: gp->i_cnt += nitems;
for (evp = gp->i_event + gp->i_next; nitems--; ++evp) {
if (p_evp != NULL)
*evp = *p_evp++;
else {
evp->e_event = E_CHARACTER;
evp->e_c = *p_s++;
evp->e_value = KEY_VAL(sp, evp->e_c);
F_INIT(&evp->e_ch, flags);
}
}
return (0);
}
/*
* v_event_append --
* Append events onto the tail of the buffer.
*/
static int
v_event_append(sp, argp)
SCR *sp;
EVENT *argp;
{
CHAR_T *s; /* Characters. */
EVENT *evp;
GS *gp;
size_t nevents; /* Number of events. */
/* Grow the buffer as necessary. */
nevents = argp->e_event == E_STRING ? argp->e_len : 1;
gp = sp->gp;
if (gp->i_event == NULL ||
nevents > gp->i_nelem - (gp->i_next + gp->i_cnt))
v_event_grow(sp, MAX(nevents, 64));
evp = gp->i_event + gp->i_next + gp->i_cnt;
gp->i_cnt += nevents;
/* Transform strings of characters into single events. */
if (argp->e_event == E_STRING)
for (s = argp->e_csp; nevents--; ++evp) {
evp->e_event = E_CHARACTER;
evp->e_c = *s++;
evp->e_value = KEY_VAL(sp, evp->e_c);
evp->e_flags = 0;
}
else
*evp = *argp;
return (0);
}
/* Remove events from the queue. */
#define QREM(len) { \
if ((gp->i_cnt -= len) == 0) \
gp->i_next = 0; \
else \
gp->i_next += len; \
}
/*
* v_event_get --
* Return the next event.
*
* !!!
* The flag EC_NODIGIT probably needs some explanation. First, the idea of
* mapping keys is that one or more keystrokes act like a function key.
* What's going on is that vi is reading a number, and the character following
* the number may or may not be mapped (EC_MAPCOMMAND). For example, if the
* user is entering the z command, a valid command is "z40+", and we don't want
* to map the '+', i.e. if '+' is mapped to "xxx", we don't want to change it
* into "z40xxx". However, if the user enters "35x", we want to put all of the
* characters through the mapping code.
*
* Historical practice is a bit muddled here. (Surprise!) It always permitted
* mapping digits as long as they weren't the first character of the map, e.g.
* ":map ^A1 xxx" was okay. It also permitted the mapping of the digits 1-9
* (the digit 0 was a special case as it doesn't indicate the start of a count)
* as the first character of the map, but then ignored those mappings. While
* it's probably stupid to map digits, vi isn't your mother.
*
* The way this works is that the EC_MAPNODIGIT causes term_key to return the
* end-of-digit without "looking" at the next character, i.e. leaving it as the
* user entered it. Presumably, the next term_key call will tell us how the
* user wants it handled.
*
* There is one more complication. Users might map keys to digits, and, as
* it's described above, the commands:
*
* :map g 1G
* d2g
*
* would return the keys "d2<end-of-digits>1G", when the user probably wanted
* "d21<end-of-digits>G". So, if a map starts off with a digit we continue as
* before, otherwise, we pretend we haven't mapped the character, and return
* <end-of-digits>.
*
* Now that that's out of the way, let's talk about Energizer Bunny macros.
* It's easy to create macros that expand to a loop, e.g. map x 3x. It's
* fairly easy to detect this example, because it's all internal to term_key.
* If we're expanding a macro and it gets big enough, at some point we can
* assume it's looping and kill it. The examples that are tough are the ones
* where the parser is involved, e.g. map x "ayyx"byy. We do an expansion
* on 'x', and get "ayyx"byy. We then return the first 4 characters, and then
* find the looping macro again. There is no way that we can detect this
* without doing a full parse of the command, because the character that might
* cause the loop (in this case 'x') may be a literal character, e.g. the map
* map x "ayy"xyy"byy is perfectly legal and won't cause a loop.
*
* Historic vi tried to detect looping macros by disallowing obvious cases in
* the map command, maps that that ended with the same letter as they started
* (which wrongly disallowed "map x 'x"), and detecting macros that expanded
* too many times before keys were returned to the command parser. It didn't
* get many (most?) of the tricky cases right, however, and it was certainly
* possible to create macros that ran forever. And, even if it did figure out
* what was going on, the user was usually tossed into ex mode. Finally, any
* changes made before vi realized that the macro was recursing were left in
* place. We recover gracefully, but the only recourse the user has in an
* infinite macro loop is to interrupt.
*
* !!!
* It is historic practice that mapping characters to themselves as the first
* part of the mapped string was legal, and did not cause infinite loops, i.e.
* ":map! { {^M^T" and ":map n nz." were known to work. The initial, matching
* characters were returned instead of being remapped.
*
* !!!
* It is also historic practice that the macro "map ] ]]^" caused a single ]
* keypress to behave as the command ]] (the ^ got the map past the vi check
* for "tail recursion"). Conversely, the mapping "map n nn^" went recursive.
* What happened was that, in the historic vi, maps were expanded as the keys
* were retrieved, but not all at once and not centrally. So, the keypress ]
* pushed ]]^ on the stack, and then the first ] from the stack was passed to
* the ]] command code. The ]] command then retrieved a key without entering
* the mapping code. This could bite us anytime a user has a map that depends
* on secondary keys NOT being mapped. I can't see any possible way to make
* this work in here without the complete abandonment of Rationality Itself.
*
* XXX
* The final issue is recovery. It would be possible to undo all of the work
* that was done by the macro if we entered a record into the log so that we
* knew when the macro started, and, in fact, this might be worth doing at some
* point. Given that this might make the log grow unacceptably (consider that
* cursor keys are done with maps), for now we leave any changes made in place.
*
* PUBLIC: int v_event_get __P((SCR *, EVENT *, int, u_int32_t));
*/
int
v_event_get(sp, argp, timeout, flags)
SCR *sp;
EVENT *argp;
int timeout;
u_int32_t flags;
{
EVENT *evp, ev;
GS *gp;
SEQ *qp;
int init_nomap, ispartial, istimeout, remap_cnt;
gp = sp->gp;
/* If simply checking for interrupts, argp may be NULL. */
if (argp == NULL)
argp = &ev;
retry: istimeout = remap_cnt = 0;
/*
* If the queue isn't empty and we're timing out for characters,
* return immediately.
*/
if (gp->i_cnt != 0 && LF_ISSET(EC_TIMEOUT))
return (0);
/*
* If the queue is empty, we're checking for interrupts, or we're
* timing out for characters, get more events.
*/
if (gp->i_cnt == 0 || LF_ISSET(EC_INTERRUPT | EC_TIMEOUT)) {
/*
* If we're reading new characters, check any scripting
* windows for input.
*/
if (F_ISSET(gp, G_SCRWIN) && sscr_input(sp))
return (1);
loop: if (gp->scr_event(sp, argp,
LF_ISSET(EC_INTERRUPT | EC_QUOTED | EC_RAW), timeout))
return (1);
switch (argp->e_event) {
case E_ERR:
case E_SIGHUP:
case E_SIGTERM:
/*
* Fatal conditions cause the file to be synced to
* disk immediately.
*/
v_sync(sp, RCV_ENDSESSION | RCV_PRESERVE |
(argp->e_event == E_SIGTERM ? 0: RCV_EMAIL));
return (1);
case E_TIMEOUT:
istimeout = 1;
break;
case E_INTERRUPT:
/* Set the global interrupt flag. */
F_SET(sp->gp, G_INTERRUPTED);
/*
* If the caller was interested in interrupts, return
* immediately.
*/
if (LF_ISSET(EC_INTERRUPT))
return (0);
goto append;
default:
append: if (v_event_append(sp, argp))
return (1);
break;
}
}
/*
* If the caller was only interested in interrupts or timeouts, return
* immediately. (We may have gotten characters, and that's okay, they
* were queued up for later use.)
*/
if (LF_ISSET(EC_INTERRUPT | EC_TIMEOUT))
return (0);
newmap: evp = &gp->i_event[gp->i_next];
/*
* If the next event in the queue isn't a character event, return
* it, we're done.
*/
if (evp->e_event != E_CHARACTER) {
*argp = *evp;
QREM(1);
return (0);
}
/*
* If the key isn't mappable because:
*
* + ... the timeout has expired
* + ... it's not a mappable key
* + ... neither the command or input map flags are set
* + ... there are no maps that can apply to it
*
* return it forthwith.
*/
if (istimeout || F_ISSET(&evp->e_ch, CH_NOMAP) ||
!LF_ISSET(EC_MAPCOMMAND | EC_MAPINPUT) ||
evp->e_c < MAX_BIT_SEQ && !bit_test(gp->seqb, evp->e_c))
goto nomap;
/* Search the map. */
qp = seq_find(sp, NULL, evp, NULL, gp->i_cnt,
LF_ISSET(EC_MAPCOMMAND) ? SEQ_COMMAND : SEQ_INPUT, &ispartial);
/*
* If get a partial match, get more characters and retry the map.
* If time out without further characters, return the characters
* unmapped.
*
* !!!
* <escape> characters are a problem. Cursor keys start with <escape>
* characters, so there's almost always a map in place that begins with
* an <escape> character. If we timeout <escape> keys in the same way
* that we timeout other keys, the user will get a noticeable pause as
* they enter <escape> to terminate input mode. If key timeout is set
* for a slow link, users will get an even longer pause. Nvi used to
* simply timeout <escape> characters at 1/10th of a second, but this
* loses over PPP links where the latency is greater than 100Ms.
*/
if (ispartial) {
if (O_ISSET(sp, O_TIMEOUT))
timeout = (evp->e_value == K_ESCAPE ?
O_VAL(sp, O_ESCAPETIME) :
O_VAL(sp, O_KEYTIME)) * 100;
else
timeout = 0;
goto loop;
}
/* If no map, return the character. */
if (qp == NULL) {
nomap: if (!isdigit(evp->e_c) && LF_ISSET(EC_MAPNODIGIT))
goto not_digit;
*argp = *evp;
QREM(1);
return (0);
}
/*
* If looking for the end of a digit string, and the first character
* of the map is it, pretend we haven't seen the character.
*/
if (LF_ISSET(EC_MAPNODIGIT) &&
qp->output != NULL && !isdigit(qp->output[0])) {
not_digit: argp->e_c = CH_NOT_DIGIT;
argp->e_value = K_NOTUSED;
argp->e_event = E_CHARACTER;
F_INIT(&argp->e_ch, 0);
return (0);
}
/* Find out if the initial segments are identical. */
init_nomap = !e_memcmp(qp->output, &gp->i_event[gp->i_next], qp->ilen);
/* Delete the mapped characters from the queue. */
QREM(qp->ilen);
/* If keys mapped to nothing, go get more. */
if (qp->output == NULL)
goto retry;
/* If remapping characters... */
if (O_ISSET(sp, O_REMAP)) {
/*
* Periodically check for interrupts. Always check the first
* time through, because it's possible to set up a map that
* will return a character every time, but will expand to more,
* e.g. "map! a aaaa" will always return a 'a', but we'll never
* get anywhere useful.
*/
if ((++remap_cnt == 1 || remap_cnt % 10 == 0) &&
(gp->scr_event(sp, &ev,
EC_INTERRUPT, 0) || ev.e_event == E_INTERRUPT)) {
F_SET(sp->gp, G_INTERRUPTED);
argp->e_event = E_INTERRUPT;
return (0);
}
/*
* If an initial part of the characters mapped, they are not
* further remapped -- return the first one. Push the rest
* of the characters, or all of the characters if no initial
* part mapped, back on the queue.
*/
if (init_nomap) {
if (v_event_push(sp, NULL, qp->output + qp->ilen,
qp->olen - qp->ilen, CH_MAPPED))
return (1);
if (v_event_push(sp, NULL,
qp->output, qp->ilen, CH_NOMAP | CH_MAPPED))
return (1);
evp = &gp->i_event[gp->i_next];
goto nomap;
}
if (v_event_push(sp, NULL, qp->output, qp->olen, CH_MAPPED))
return (1);
goto newmap;
}
/* Else, push the characters on the queue and return one. */
if (v_event_push(sp, NULL, qp->output, qp->olen, CH_MAPPED | CH_NOMAP))
return (1);
goto nomap;
}
/*
* v_sync --
* Walk the screen lists, sync'ing files to their backup copies.
*/
static void
v_sync(sp, flags)
SCR *sp;
int flags;
{
GS *gp;
gp = sp->gp;
for (sp = gp->dq.cqh_first; sp != (void *)&gp->dq; sp = sp->q.cqe_next)
rcv_sync(sp, flags);
for (sp = gp->hq.cqh_first; sp != (void *)&gp->hq; sp = sp->q.cqe_next)
rcv_sync(sp, flags);
}
/*
* v_event_err --
* Unexpected event.
*
* PUBLIC: void v_event_err __P((SCR *, EVENT *));
*/
void
v_event_err(sp, evp)
SCR *sp;
EVENT *evp;
{
switch (evp->e_event) {
case E_CHARACTER:
msgq(sp, M_ERR, "276|Unexpected character event");
break;
case E_EOF:
msgq(sp, M_ERR, "277|Unexpected end-of-file event");
break;
case E_INTERRUPT:
msgq(sp, M_ERR, "279|Unexpected interrupt event");
break;
case E_QUIT:
msgq(sp, M_ERR, "280|Unexpected quit event");
break;
case E_REPAINT:
msgq(sp, M_ERR, "281|Unexpected repaint event");
break;
case E_STRING:
msgq(sp, M_ERR, "285|Unexpected string event");
break;
case E_TIMEOUT:
msgq(sp, M_ERR, "286|Unexpected timeout event");
break;
case E_WRESIZE:
msgq(sp, M_ERR, "316|Unexpected resize event");
break;
case E_WRITE:
msgq(sp, M_ERR, "287|Unexpected write event");
break;
/*
* Theoretically, none of these can occur, as they're handled at the
* top editor level.
*/
case E_ERR:
case E_SIGHUP:
case E_SIGTERM:
default:
abort();
}
/* Free any allocated memory. */
if (evp->e_asp != NULL)
free(evp->e_asp);
}
/*
* v_event_flush --
* Flush any flagged keys, returning if any keys were flushed.
*
* PUBLIC: int v_event_flush __P((SCR *, u_int));
*/
int
v_event_flush(sp, flags)
SCR *sp;
u_int flags;
{
GS *gp;
int rval;
for (rval = 0, gp = sp->gp; gp->i_cnt != 0 &&
F_ISSET(&gp->i_event[gp->i_next].e_ch, flags); rval = 1)
QREM(1);
return (rval);
}
/*
* v_event_grow --
* Grow the terminal queue.
*/
static int
v_event_grow(sp, add)
SCR *sp;
int add;
{
GS *gp;
size_t new_nelem, olen;
gp = sp->gp;
new_nelem = gp->i_nelem + add;
olen = gp->i_nelem * sizeof(gp->i_event[0]);
BINC_RET(sp, gp->i_event, olen, new_nelem * sizeof(gp->i_event[0]));
gp->i_nelem = olen / sizeof(gp->i_event[0]);
return (0);
}
/*
* v_key_cmp --
* Compare two keys for sorting.
*/
static int
v_key_cmp(ap, bp)
const void *ap, *bp;
{
return (((KEYLIST *)ap)->ch - ((KEYLIST *)bp)->ch);
}