Subversion Repositories planix.SVN

#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;

}