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;
}