/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../common/common.h"
#include "vi.h"
typedef enum {
SCROLL_W, /* User wait. */
SCROLL_W_EX, /* User wait, or enter : to continue. */
SCROLL_W_QUIT /* User wait, or enter q to quit. */
/*
* SCROLL_W_QUIT has another semantic
* -- only wait if the screen is full
*/
} sw_t;
static void vs_divider(SCR *);
static void vs_msgsave(SCR *, mtype_t, char *, size_t);
static void vs_output(SCR *, mtype_t, const char *, int);
static void vs_scroll(SCR *, int *, sw_t);
static void vs_wait(SCR *, int *, sw_t);
/*
* vs_busy --
* Display, update or clear a busy message.
*
* This routine is the default editor interface for vi busy messages. It
* implements a standard strategy of stealing lines from the bottom of the
* vi text screen. Screens using an alternate method of displaying busy
* messages, e.g. X11 clock icons, should set their scr_busy function to the
* correct function before calling the main editor routine.
*
* PUBLIC: void vs_busy(SCR *, const char *, busy_t);
*/
void
vs_busy(SCR *sp, const char *msg, busy_t btype)
{
GS *gp;
VI_PRIVATE *vip;
static const char flagc[] = "|/-\\";
struct timespec ts, ts_diff;
const struct timespec ts_min = { 0, 125000000 };
size_t len, notused;
const char *p;
/* Ex doesn't display busy messages. */
if (F_ISSET(sp, SC_EX | SC_SCR_EXWROTE))
return;
gp = sp->gp;
vip = VIP(sp);
/*
* Most of this routine is to deal with the screen sharing real estate
* between the normal edit messages and the busy messages. Logically,
* all that's needed is something that puts up a message, periodically
* updates it, and then goes away.
*/
switch (btype) {
case BUSY_ON:
++vip->busy_ref;
if (vip->totalcount != 0 || vip->busy_ref != 1)
break;
/* Initialize state for updates. */
vip->busy_ch = 0;
timepoint_steady(&vip->busy_ts);
/* Save the current cursor. */
(void)gp->scr_cursor(sp, &vip->busy_oldy, &vip->busy_oldx);
/* Display the busy message. */
p = msg_cat(sp, msg, &len);
(void)gp->scr_move(sp, LASTLINE(sp), 0);
(void)gp->scr_addstr(sp, p, len);
(void)gp->scr_cursor(sp, ¬used, &vip->busy_fx);
(void)gp->scr_clrtoeol(sp);
(void)gp->scr_move(sp, LASTLINE(sp), vip->busy_fx);
break;
case BUSY_OFF:
if (vip->busy_ref == 0)
break;
--vip->busy_ref;
/*
* If the line isn't in use for another purpose, clear it.
* Always return to the original position.
*/
if (vip->totalcount == 0 && vip->busy_ref == 0) {
(void)gp->scr_move(sp, LASTLINE(sp), 0);
(void)gp->scr_clrtoeol(sp);
}
(void)gp->scr_move(sp, vip->busy_oldy, vip->busy_oldx);
break;
case BUSY_UPDATE:
if (vip->totalcount != 0 || vip->busy_ref == 0)
break;
/* Update no more than every 1/8 of a second. */
timepoint_steady(&ts);
ts_diff = ts;
timespecsub(&ts_diff, &vip->busy_ts);
if (timespeccmp(&ts_diff, &ts_min, <))
return;
vip->busy_ts = ts;
/* Display the update. */
if (vip->busy_ch == sizeof(flagc) - 1)
vip->busy_ch = 0;
(void)gp->scr_move(sp, LASTLINE(sp), vip->busy_fx);
(void)gp->scr_addstr(sp, flagc + vip->busy_ch++, 1);
(void)gp->scr_move(sp, LASTLINE(sp), vip->busy_fx);
break;
}
(void)gp->scr_refresh(sp, 0);
}
/*
* vs_home --
* Home the cursor to the bottom row, left-most column.
*
* PUBLIC: void vs_home(SCR *);
*/
void
vs_home(SCR *sp)
{
(void)sp->gp->scr_move(sp, LASTLINE(sp), 0);
(void)sp->gp->scr_refresh(sp, 0);
}
/*
* vs_update --
* Update a command.
*
* PUBLIC: void vs_update(SCR *, const char *, const CHAR_T *);
*/
void
vs_update(SCR *sp, const char *m1, const CHAR_T *m2)
{
GS *gp;
size_t len, mlen, oldx, oldy;
CONST char *np;
size_t nlen;
gp = sp->gp;
/*
* This routine displays a message on the bottom line of the screen,
* without updating any of the command structures that would keep it
* there for any period of time, i.e. it is overwritten immediately.
*
* It's used by the ex read and ! commands when the user's command is
* expanded, and by the ex substitution confirmation prompt.
*/
if (F_ISSET(sp, SC_SCR_EXWROTE)) {
if (m2 != NULL)
INT2CHAR(sp, m2, STRLEN(m2) + 1, np, nlen);
(void)ex_printf(sp,
"%s\n", m1 == NULL? "" : m1, m2 == NULL ? "" : np);
(void)ex_fflush(sp);
}
/*
* Save the cursor position, the substitute-with-confirmation code
* will have already set it correctly.
*/
(void)gp->scr_cursor(sp, &oldy, &oldx);
/* Clear the bottom line. */
(void)gp->scr_move(sp, LASTLINE(sp), 0);
(void)gp->scr_clrtoeol(sp);
/*
* XXX
* Don't let long file names screw up the screen.
*/
if (m1 != NULL) {
mlen = len = strlen(m1);
if (len > sp->cols - 2)
mlen = len = sp->cols - 2;
(void)gp->scr_addstr(sp, m1, mlen);
} else
len = 0;
if (m2 != NULL) {
mlen = STRLEN(m2);
if (len + mlen > sp->cols - 2)
mlen = (sp->cols - 2) - len;
(void)gp->scr_waddstr(sp, m2, mlen);
}
(void)gp->scr_move(sp, oldy, oldx);
(void)gp->scr_refresh(sp, 0);
}
/*
* vs_msg --
* Display ex output or error messages for the screen.
*
* This routine is the default editor interface for all ex output, and all ex
* and vi error/informational messages. It implements the standard strategy
* of stealing lines from the bottom of the vi text screen. Screens using an
* alternate method of displaying messages, e.g. dialog boxes, should set their
* scr_msg function to the correct function before calling the editor.
*
* PUBLIC: void vs_msg(SCR *, mtype_t, char *, size_t);
*/
void
vs_msg(SCR *sp, mtype_t mtype, char *line, size_t len)
{
GS *gp;
VI_PRIVATE *vip;
size_t maxcols, oldx, oldy, padding;
const char *e, *s, *t;
gp = sp->gp;
vip = VIP(sp);
/*
* Ring the bell if it's scheduled.
*
* XXX
* Shouldn't we save this, too?
*/
if (F_ISSET(sp, SC_TINPUT_INFO) || F_ISSET(gp, G_BELLSCHED)) {
if (F_ISSET(sp, SC_SCR_VI)) {
F_CLR(gp, G_BELLSCHED);
(void)gp->scr_bell(sp);
} else
F_SET(gp, G_BELLSCHED);
}
/*
* If vi is using the error line for text input, there's no screen
* real-estate for the error message. Nothing to do without some
* information as to how important the error message is.
*/
if (F_ISSET(sp, SC_TINPUT_INFO))
return;
/*
* Ex or ex controlled screen output.
*
* If output happens during startup, e.g., a .exrc file, we may be
* in ex mode but haven't initialized the screen. Initialize here,
* and in this case, stay in ex mode.
*
* If the SC_SCR_EXWROTE bit is set, then we're switching back and
* forth between ex and vi, but the screen is trashed and we have
* to respect that. Switch to ex mode long enough to put out the
* message.
*
* If the SC_EX_WAIT_NO bit is set, turn it off -- we're writing to
* the screen, so previous opinions are ignored.
*/
if (F_ISSET(sp, SC_EX | SC_SCR_EXWROTE)) {
if (!F_ISSET(sp, SC_SCR_EX)) {
if (F_ISSET(sp, SC_SCR_EXWROTE)) {
if (sp->gp->scr_screen(sp, SC_EX))
return;
} else
if (ex_init(sp))
return;
}
if (mtype == M_ERR)
(void)gp->scr_attr(sp, SA_INVERSE, 1);
(void)printf("%.*s", (int)len, line);
if (mtype == M_ERR)
(void)gp->scr_attr(sp, SA_INVERSE, 0);
(void)fflush(stdout);
F_CLR(sp, SC_EX_WAIT_NO);
if (!F_ISSET(sp, SC_SCR_EX))
(void)sp->gp->scr_screen(sp, SC_VI);
return;
}
/* If the vi screen isn't ready, save the message. */
if (!F_ISSET(sp, SC_SCR_VI)) {
(void)vs_msgsave(sp, mtype, line, len);
return;
}
/* Save the cursor position. */
(void)gp->scr_cursor(sp, &oldy, &oldx);
/* If it's an ex output message, just write it out. */
if (mtype == M_NONE) {
vs_output(sp, mtype, line, len);
goto ret;
}
/*
* If it's a vi message, strip the trailing <newline> so we can
* try and paste messages together.
*/
if (line[len - 1] == '\n')
--len;
/*
* If a message won't fit on a single line, try to split on a <blank>.
* If a subsequent message fits on the same line, write a separator
* and output it. Otherwise, put out a newline.
*
* Need up to two padding characters normally; a semi-colon and a
* separating space. If only a single line on the screen, add some
* more for the trailing continuation message.
*
* XXX
* Assume that periods and semi-colons take up a single column on the
* screen.
*
* XXX
* There are almost certainly pathological cases that will break this
* code.
*/
if (IS_ONELINE(sp))
(void)msg_cmsg(sp, CMSG_CONT_S, &padding);
else
padding = 0;
padding += 2;
maxcols = sp->cols - 1;
if (vip->lcontinue != 0) {
if (len + vip->lcontinue + padding > maxcols)
vs_output(sp, vip->mtype, ".\n", 2);
else {
vs_output(sp, vip->mtype, ";", 1);
vs_output(sp, M_NONE, " ", 1);
}
}
vip->mtype = mtype;
for (s = line;; s = t) {
for (; len > 0 && isblank((u_char)*s); --len, ++s);
if (len == 0)
break;
if (len + vip->lcontinue > maxcols) {
for (e = s + (maxcols - vip->lcontinue);
e > s && !isblank((u_char)*e); --e);
if (e == s)
e = t = s + (maxcols - vip->lcontinue);
else
for (t = e; isblank((u_char)e[-1]); --e);
} else
e = t = s + len;
/*
* If the message ends in a period, discard it, we want to
* gang messages where possible.
*/
len -= t - s;
if (len == 0 && (e - s) > 1 && s[(e - s) - 1] == '.')
--e;
vs_output(sp, mtype, s, e - s);
if (len != 0)
vs_output(sp, M_NONE, "\n", 1);
if (INTERRUPTED(sp))
break;
}
ret: (void)gp->scr_move(sp, oldy, oldx);
(void)gp->scr_refresh(sp, 0);
}
/*
* vs_output --
* Output the text to the screen.
*/
static void
vs_output(SCR *sp, mtype_t mtype, const char *line, int llen)
{
GS *gp;
VI_PRIVATE *vip;
size_t notused;
int len, rlen, tlen;
const char *p, *t;
char *cbp, *ecbp, cbuf[128];
gp = sp->gp;
vip = VIP(sp);
for (p = line, rlen = llen; llen > 0;) {
/* Get the next physical line. */
if ((p = memchr(line, '\n', llen)) == NULL)
len = llen;
else
len = p - line;
/*
* The max is sp->cols characters, and we may have already
* written part of the line.
*/
if (len + vip->lcontinue > sp->cols)
len = sp->cols - vip->lcontinue;
/*
* If the first line output, do nothing. If the second line
* output, draw the divider line. If drew a full screen, we
* remove the divider line. If it's a continuation line, move
* to the continuation point, else, move the screen up.
*/
if (vip->lcontinue == 0) {
if (!IS_ONELINE(sp)) {
if (vip->totalcount == 1) {
(void)gp->scr_move(sp,
LASTLINE(sp) - 1, 0);
(void)gp->scr_clrtoeol(sp);
(void)vs_divider(sp);
F_SET(vip, VIP_DIVIDER);
++vip->totalcount;
++vip->linecount;
}
if (vip->totalcount == sp->t_maxrows &&
F_ISSET(vip, VIP_DIVIDER)) {
--vip->totalcount;
--vip->linecount;
F_CLR(vip, VIP_DIVIDER);
}
}
if (vip->totalcount != 0)
vs_scroll(sp, NULL, SCROLL_W_QUIT);
(void)gp->scr_move(sp, LASTLINE(sp), 0);
++vip->totalcount;
++vip->linecount;
if (INTERRUPTED(sp))
break;
} else
(void)gp->scr_move(sp, LASTLINE(sp), vip->lcontinue);
/* Error messages are in inverse video. */
if (mtype == M_ERR)
(void)gp->scr_attr(sp, SA_INVERSE, 1);
/* Display the line, doing character translation. */
#define FLUSH do { \
*cbp = '\0'; \
(void)gp->scr_addstr(sp, cbuf, cbp - cbuf); \
cbp = cbuf; \
} while (0)
ecbp = (cbp = cbuf) + sizeof(cbuf) - 1;
for (t = line, tlen = len; tlen--; ++t) {
/*
* Replace tabs with spaces, there are places in
* ex that do column calculations without looking
* at <tabs> -- and all routines that care about
* <tabs> do their own expansions. This catches
* <tabs> in things like tag search strings.
*/
if (cbp + 1 >= ecbp)
FLUSH;
*cbp++ = *t == '\t' ? ' ' : *t;
}
if (cbp > cbuf)
FLUSH;
if (mtype == M_ERR)
(void)gp->scr_attr(sp, SA_INVERSE, 0);
/* Clear the rest of the line. */
(void)gp->scr_clrtoeol(sp);
/* If we loop, it's a new line. */
vip->lcontinue = 0;
/* Reset for the next line. */
line += len;
llen -= len;
if (p != NULL) {
++line;
--llen;
}
}
/* Set up next continuation line. */
if (p == NULL)
gp->scr_cursor(sp, ¬used, &vip->lcontinue);
}
/*
* vs_ex_resolve --
* Deal with ex message output.
*
* This routine is called when exiting a colon command to resolve any ex
* output that may have occurred.
*
* PUBLIC: int vs_ex_resolve(SCR *, int *);
*/
int
vs_ex_resolve(SCR *sp, int *continuep)
{
EVENT ev;
GS *gp;
VI_PRIVATE *vip;
sw_t wtype;
gp = sp->gp;
vip = VIP(sp);
*continuep = 0;
/* If we ran any ex command, we can't trust the cursor position. */
F_SET(vip, VIP_CUR_INVALID);
/* Terminate any partially written message. */
if (vip->lcontinue != 0) {
vs_output(sp, vip->mtype, ".", 1);
vip->lcontinue = 0;
vip->mtype = M_NONE;
}
/*
* If we switched out of the vi screen into ex, switch back while we
* figure out what to do with the screen and potentially get another
* command to execute.
*
* If we didn't switch into ex, we're not required to wait, and less
* than 2 lines of output, we can continue without waiting for the
* wait.
*
* Note, all other code paths require waiting, so we leave the report
* of modified lines until later, so that we won't wait for no other
* reason than a threshold number of lines were modified. This means
* we display cumulative line modification reports for groups of ex
* commands. That seems right to me (well, at least not wrong).
*/
if (F_ISSET(sp, SC_SCR_EXWROTE)) {
if (sp->gp->scr_screen(sp, SC_VI))
return (1);
} else
if (!F_ISSET(sp, SC_EX_WAIT_YES) && vip->totalcount < 2) {
F_CLR(sp, SC_EX_WAIT_NO);
return (0);
}
/* Clear the required wait flag, it's no longer needed. */
F_CLR(sp, SC_EX_WAIT_YES);
/*
* Wait, unless explicitly told not to wait or the user interrupted
* the command. If the user is leaving the screen, for any reason,
* they can't continue with further ex commands.
*/
if (!F_ISSET(sp, SC_EX_WAIT_NO) && !INTERRUPTED(sp)) {
wtype = F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE |
SC_FSWITCH | SC_SSWITCH) ? SCROLL_W : SCROLL_W_EX;
if (F_ISSET(sp, SC_SCR_EXWROTE))
vs_wait(sp, continuep, wtype);
else
vs_scroll(sp, continuep, wtype);
if (*continuep)
return (0);
}
/* If ex wrote on the screen, refresh the screen image. */
if (F_ISSET(sp, SC_SCR_EXWROTE))
F_SET(vip, VIP_N_EX_PAINT);
/*
* If we're not the bottom of the split screen stack, the screen
* image itself is wrong, so redraw everything.
*/
if (TAILQ_NEXT(sp, q) != NULL)
F_SET(sp, SC_SCR_REDRAW);
/* If ex changed the underlying file, the map itself is wrong. */
if (F_ISSET(vip, VIP_N_EX_REDRAW))
F_SET(sp, SC_SCR_REFORMAT);
/* Ex may have switched out of the alternate screen, return. */
(void)gp->scr_attr(sp, SA_ALTERNATE, 1);
/*
* Whew. We're finally back home, after what feels like years.
* Kiss the ground.
*/
F_CLR(sp, SC_SCR_EXWROTE | SC_EX_WAIT_NO);
/*
* We may need to repaint some of the screen, e.g.:
*
* :set
* :!ls
*
* gives us a combination of some lines that are "wrong", and a need
* for a full refresh.
*/
if (vip->totalcount > 1) {
/* Set up the redraw of the overwritten lines. */
ev.e_event = E_REPAINT;
ev.e_flno = vip->totalcount >=
sp->rows ? 1 : sp->rows - vip->totalcount;
ev.e_tlno = sp->rows;
/* Reset the count of overwriting lines. */
vip->linecount = vip->lcontinue = vip->totalcount = 0;
/* Redraw. */
(void)vs_repaint(sp, &ev);
} else
/* Reset the count of overwriting lines. */
vip->linecount = vip->lcontinue = vip->totalcount = 0;
return (0);
}
/*
* vs_resolve --
* Deal with message output.
*
* PUBLIC: int vs_resolve(SCR *, SCR *, int);
*/
int
vs_resolve(SCR *sp, SCR *csp, int forcewait)
{
EVENT ev;
GS *gp;
MSGS *mp;
VI_PRIVATE *vip;
size_t oldy, oldx;
int redraw;
/*
* Vs_resolve is called from the main vi loop and the refresh function
* to periodically ensure that the user has seen any messages that have
* been displayed and that any status lines are correct. The sp screen
* is the screen we're checking, usually the current screen. When it's
* not, csp is the current screen, used for final cursor positioning.
*/
gp = sp->gp;
vip = VIP(sp);
if (csp == NULL)
csp = sp;
/* Save the cursor position. */
(void)gp->scr_cursor(csp, &oldy, &oldx);
/* Ring the bell if it's scheduled. */
if (F_ISSET(gp, G_BELLSCHED)) {
F_CLR(gp, G_BELLSCHED);
(void)gp->scr_bell(sp);
}
/* Display new file status line. */
if (F_ISSET(sp, SC_STATUS)) {
F_CLR(sp, SC_STATUS);
msgq_status(sp, sp->lno, MSTAT_TRUNCATE);
}
/* Report on line modifications. */
mod_rpt(sp);
/*
* Flush any saved messages. If the screen isn't ready, refresh
* it. (A side-effect of screen refresh is that we can display
* messages.) Once this is done, don't trust the cursor. That
* extra refresh screwed the pooch.
*/
if (!SLIST_EMPTY(gp->msgq)) {
if (!F_ISSET(sp, SC_SCR_VI) && vs_refresh(sp, 1))
return (1);
while ((mp = SLIST_FIRST(gp->msgq)) != NULL) {
gp->scr_msg(sp, mp->mtype, mp->buf, mp->len);
SLIST_REMOVE_HEAD(gp->msgq, q);
free(mp->buf);
free(mp);
}
F_SET(vip, VIP_CUR_INVALID);
}
switch (vip->totalcount) {
case 0:
redraw = 0;
break;
case 1:
/*
* If we're switching screens, we have to wait for messages,
* regardless. If we don't wait, skip updating the modeline.
*/
if (forcewait)
vs_scroll(sp, NULL, SCROLL_W);
else
F_SET(vip, VIP_S_MODELINE);
redraw = 0;
break;
default:
/*
* If >1 message line in use, prompt the user to continue and
* repaint overwritten lines.
*/
vs_scroll(sp, NULL, SCROLL_W);
ev.e_event = E_REPAINT;
ev.e_flno = vip->totalcount >=
sp->rows ? 1 : sp->rows - vip->totalcount;
ev.e_tlno = sp->rows;
redraw = 1;
break;
}
/* Reset the count of overwriting lines. */
vip->linecount = vip->lcontinue = vip->totalcount = 0;
/* Redraw. */
if (redraw)
(void)vs_repaint(sp, &ev);
/* Restore the cursor position. */
(void)gp->scr_move(csp, oldy, oldx);
return (0);
}
/*
* vs_scroll --
* Scroll the screen for output.
*/
static void
vs_scroll(SCR *sp, int *continuep, sw_t wtype)
{
GS *gp;
VI_PRIVATE *vip;
gp = sp->gp;
vip = VIP(sp);
if (!IS_ONELINE(sp)) {
/*
* Scroll the screen. Instead of scrolling the entire screen,
* delete the line above the first line output so preserve the
* maximum amount of the screen.
*/
(void)gp->scr_move(sp, vip->totalcount <
sp->rows ? LASTLINE(sp) - vip->totalcount : 0, 0);
(void)gp->scr_deleteln(sp);
/* If there are screens below us, push them back into place. */
if (TAILQ_NEXT(sp, q) != NULL) {
(void)gp->scr_move(sp, LASTLINE(sp), 0);
(void)gp->scr_insertln(sp);
}
}
if (wtype == SCROLL_W_QUIT && vip->linecount < sp->t_maxrows)
return;
vs_wait(sp, continuep, wtype);
}
/*
* vs_wait --
* Prompt the user to continue.
*/
static void
vs_wait(SCR *sp, int *continuep, sw_t wtype)
{
EVENT ev;
VI_PRIVATE *vip;
const char *p;
GS *gp;
size_t len;
gp = sp->gp;
vip = VIP(sp);
(void)gp->scr_move(sp, LASTLINE(sp), 0);
if (IS_ONELINE(sp))
p = msg_cmsg(sp, CMSG_CONT_S, &len);
else
switch (wtype) {
case SCROLL_W_QUIT:
p = msg_cmsg(sp, CMSG_CONT_Q, &len);
break;
case SCROLL_W_EX:
p = msg_cmsg(sp, CMSG_CONT_EX, &len);
break;
case SCROLL_W:
p = msg_cmsg(sp, CMSG_CONT, &len);
break;
default:
abort();
/* NOTREACHED */
}
(void)gp->scr_addstr(sp, p, len);
++vip->totalcount;
vip->linecount = 0;
(void)gp->scr_clrtoeol(sp);
(void)gp->scr_refresh(sp, 0);
/* Get a single character from the terminal. */
if (continuep != NULL)
*continuep = 0;
for (;;) {
if (v_event_get(sp, &ev, 0, 0))
return;
if (ev.e_event == E_CHARACTER)
break;
if (ev.e_event == E_INTERRUPT) {
ev.e_c = CH_QUIT;
F_SET(gp, G_INTERRUPTED);
break;
}
(void)gp->scr_bell(sp);
}
switch (wtype) {
case SCROLL_W_QUIT:
if (ev.e_c == CH_QUIT)
F_SET(gp, G_INTERRUPTED);
break;
case SCROLL_W_EX:
if (ev.e_c == ':' && continuep != NULL)
*continuep = 1;
break;
case SCROLL_W:
break;
}
}
/*
* vs_divider --
* Draw a dividing line between the screen and the output.
*/
static void
vs_divider(SCR *sp)
{
GS *gp;
size_t len;
#define DIVIDESTR "+=+=+=+=+=+=+=+"
len =
sizeof(DIVIDESTR) - 1 > sp->cols ? sp->cols : sizeof(DIVIDESTR) - 1;
gp = sp->gp;
(void)gp->scr_attr(sp, SA_INVERSE, 1);
(void)gp->scr_addstr(sp, DIVIDESTR, len);
(void)gp->scr_attr(sp, SA_INVERSE, 0);
}
/*
* vs_msgsave --
* Save a message for later display.
*/
static void
vs_msgsave(SCR *sp, mtype_t mt, char *p, size_t len)
{
GS *gp;
MSGS *mp_c, *mp_n;
/*
* We have to handle messages before we have any place to put them.
* If there's no screen support yet, allocate a msg structure, copy
* in the message, and queue it on the global structure. If we can't
* allocate memory here, we're genuinely screwed, dump the message
* to stderr in the (probably) vain hope that someone will see it.
*/
CALLOC_GOTO(sp, mp_n, 1, sizeof(MSGS));
MALLOC_GOTO(sp, mp_n->buf, len);
memmove(mp_n->buf, p, len);
mp_n->len = len;
mp_n->mtype = mt;
gp = sp->gp;
if (SLIST_EMPTY(gp->msgq)) {
SLIST_INSERT_HEAD(gp->msgq, mp_n, q);
} else {
SLIST_FOREACH(mp_c, gp->msgq, q)
if (SLIST_NEXT(mp_c, q) == NULL)
break;
SLIST_INSERT_AFTER(mp_c, mp_n, q);
}
return;
alloc_err:
free(mp_n);
(void)fprintf(stderr, "%.*s\n", (int)len, p);
}