ref: cce5422e79699bc71e6525d77dfc3d8a9f5b1b9d
dir: /acme/bin/source/adict/win.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <thread.h>
#include "win.h"
void*
erealloc(void *p, uint n)
{
p = realloc(p, n);
if(p == nil)
fprint(2, "realloc failed: %r");
return p;
}
void
wnew(Win *w)
{
char buf[12];
w->ctl = open("/mnt/acme/new/ctl", ORDWR);
if(w->ctl<0 || read(w->ctl, buf, 12)!=12)
fprint (2, "can't open window ctl file: %r");
ctlwrite(w, "noscroll\n");
w->winid = atoi(buf);
w->event = openfile(w, "event");
w->addr = -1; /* will be opened when needed */
w->body = nil;
w->data = -1;
}
int
openfile(Win *w, char *f)
{
char buf[64];
int fd;
sprint(buf, "/mnt/acme/%d/%s", w->winid, f);
fd = open(buf, ORDWR|OCEXEC);
if(fd < 0)
fprint (2,"can't open window %s file: %r", f);
return fd;
}
void
openbody(Win *w, int mode)
{
char buf[64];
sprint(buf, "/mnt/acme/%d/body", w->winid);
w->body = Bopen(buf, mode|OCEXEC);
if(w->body == nil)
fprint(2,"can't open window body file: %r");
}
void
wwritebody(Win *w, char *s, int n)
{
if(w->body == nil)
openbody(w, OWRITE);
if(Bwrite(w->body, s, n) != n)
fprint(2,"write error to window: %r");
Bflush(w->body);
}
void
wreplace(Win *w, char *addr, char *repl, int nrepl)
{
if(w->addr < 0)
w->addr = openfile(w, "addr");
if(w->data < 0)
w->data = openfile(w, "data");
if(write(w->addr, addr, strlen(addr)) < 0){
fprint(2, "mail: warning: badd address %s:%r\n", addr);
return;
}
if(write(w->data, repl, nrepl) != nrepl)
fprint(2, "writing data: %r");
}
static int
nrunes(char *s, int nb)
{
int i, n;
Rune r;
n = 0;
for(i=0; i<nb; n++)
i += chartorune(&r, s+i);
return n;
}
void
wread(Win *w, uint q0, uint q1, char *data)
{
int m, n, nr;
char buf[256];
if(w->addr < 0)
w->addr = openfile(w, "addr");
if(w->data < 0)
w->data = openfile(w, "data");
m = q0;
while(m < q1){
n = sprint(buf, "#%d", m);
if(write(w->addr, buf, n) != n)
fprint(2,"writing addr: %r");
n = read(w->data, buf, sizeof buf);
if(n <= 0)
fprint(2,"reading data: %r");
nr = nrunes(buf, n);
while(m+nr >q1){
do; while(n>0 && (buf[--n]&0xC0)==0x80);
--nr;
}
if(n == 0)
break;
memmove(data, buf, n);
data += n;
*data = 0;
m += nr;
}
}
void
wselect(Win *w, char *addr)
{
if(w->addr < 0)
w->addr = openfile(w, "addr");
if(write(w->addr, addr, strlen(addr)) < 0)
fprint(2,"writing addr");
ctlwrite(w, "dot=addr\n");
}
void
wtagwrite(Win *w, char *s, int n)
{
int fd;
fd = openfile(w, "tag");
if(write(fd, s, n) != n)
fprint(2,"tag write: %r");
close(fd);
}
void
ctlwrite(Win *w, char *s)
{
int n;
n = strlen(s);
if(write(w->ctl, s, n) != n)
fprint(2,"write error to ctl file: %r");
}
int
wdel(Win *w)
{
if(write(w->ctl, "del\n", 4) != 4)
return False;
wdormant(w);
close(w->ctl);
w->ctl = -1;
close(w->event);
w->event = -1;
return True;
}
void
wname(Win *w, char *s)
{
char buf[128];
sprint(buf, "name %s\n", s);
ctlwrite(w, buf);
}
void
wclean(Win *w)
{
if(w->body)
Bflush(w->body);
ctlwrite(w, "clean\n");
}
void
wdormant(Win *w)
{
if(w->addr >= 0){
close(w->addr);
w->addr = -1;
}
if(w->body != nil){
Bterm(w->body);
w->body = nil;
}
if(w->data >= 0){
close(w->data);
w->data = -1;
}
}
int
getec(Win *w)
{
if(w->nbuf == 0){
w->nbuf = read(w->event, w->buf, sizeof w->buf);
if(w->nbuf <= 0)
fprint(2,"event read error: %r");
w->bufp = w->buf;
}
w->nbuf--;
return *w->bufp++;
}
int
geten(Win *w)
{
int n, c;
n = 0;
while('0'<=(c=getec(w)) && c<='9')
n = n*10+(c-'0');
if(c != ' ')
fprint(2, "event number syntax");
return n;
}
int
geter(Win *w, char *buf, int *nb)
{
Rune r;
int n;
r = getec(w);
buf[0] = r;
n = 1;
if(r < Runeself)
goto Return;
while(!fullrune(buf, n))
buf[n++] = getec(w);
chartorune(&r, buf);
Return:
*nb = n;
return r;
}
void
wevent(Win *w, Event *e)
{
int i, nb;
e->c1 = getec(w);
e->c2 = getec(w);
e->q0 = geten(w);
e->q1 = geten(w);
e->flag = geten(w);
e->nr = geten(w);
if(e->nr > EVENTSIZE)
fprint(2, "wevent: event string too long");
e->nb = 0;
for(i=0; i<e->nr; i++){
e->r[i] = geter(w, e->b+e->nb, &nb);
e->nb += nb;
}
e->r[e->nr] = 0;
e->b[e->nb] = 0;
if(getec(w) != '\n')
fprint(2, "wevent: event syntax 2");
}
void
wslave(Win *w, Channel *ce)
{
Event e;
while(recv(ce, &e) >= 0)
wevent(w, &e);
}
void
wwriteevent(Win *w, Event *e)
{
fprint(w->event, "%c%c%d %d\n", e->c1, e->c2, e->q0, e->q1);
}
int
wreadall(Win *w, char **sp)
{
char *s;
int m, na, n;
if(w->body != nil)
Bterm(w->body);
openbody(w, OREAD);
s = nil;
na = 0;
n = 0;
for(;;){
if(na < n+512){
na += 1024;
s = erealloc(s, na+1);
}
m = Bread(w->body, s+n, na-n);
if(m <= 0)
break;
n += m;
}
s[n] = 0;
Bterm(w->body);
w->body = nil;
*sp = s;
return n;
}