ref: 52cacba37c6f3a125ef931afa4b9c2cdb7438fef
dir: /sys/src/cmd/sam/mesg.c/
#include "sam.h"
Header h;
uchar indata[DATASIZE];
uchar outdata[2*DATASIZE+3]; /* room for overflow message */
uchar *inp;
uchar *outp;
uchar *outmsg = outdata;
Posn cmdpt;
Posn cmdptadv;
Buffer snarfbuf;
int waitack;
int outbuffered;
int tversion;
int inshort(void);
long inlong(void);
vlong invlong(void);
int inmesg(Tmesg);
void outshort(int);
void outlong(long);
void outvlong(vlong);
void outcopy(int, void*);
void outsend(void);
void outstart(Hmesg);
void setgenstr(File*, Posn, Posn);
#ifdef DEBUG
char *hname[] = {
[Hversion] "Hversion",
[Hbindname] "Hbindname",
[Hcurrent] "Hcurrent",
[Hnewname] "Hnewname",
[Hmovname] "Hmovname",
[Hgrow] "Hgrow",
[Hcheck0] "Hcheck0",
[Hcheck] "Hcheck",
[Hunlock] "Hunlock",
[Hdata] "Hdata",
[Horigin] "Horigin",
[Hunlockfile] "Hunlockfile",
[Hsetdot] "Hsetdot",
[Hgrowdata] "Hgrowdata",
[Hmoveto] "Hmoveto",
[Hclean] "Hclean",
[Hdirty] "Hdirty",
[Hcut] "Hcut",
[Hsetpat] "Hsetpat",
[Hdelname] "Hdelname",
[Hclose] "Hclose",
[Hsetsnarf] "Hsetsnarf",
[Hsnarflen] "Hsnarflen",
[Hack] "Hack",
[Hexit] "Hexit",
[Hplumb] "Hplumb",
};
char *tname[] = {
[Tversion] "Tversion",
[Tstartcmdfile] "Tstartcmdfile",
[Tcheck] "Tcheck",
[Trequest] "Trequest",
[Torigin] "Torigin",
[Tstartfile] "Tstartfile",
[Tworkfile] "Tworkfile",
[Ttype] "Ttype",
[Tcut] "Tcut",
[Tpaste] "Tpaste",
[Tsnarf] "Tsnarf",
[Tstartnewfile] "Tstartnewfile",
[Twrite] "Twrite",
[Tclose] "Tclose",
[Tlook] "Tlook",
[Tsearch] "Tsearch",
[Tsend] "Tsend",
[Tdclick] "Tdclick",
[Tstartsnarf] "Tstartsnarf",
[Tsetsnarf] "Tsetsnarf",
[Tack] "Tack",
[Texit] "Texit",
[Tplumb] "Tplumb",
};
void
journal(int out, char *s)
{
static int fd = -1;
if(fd < 0)
fd = create("/tmp/sam.out", 1, 0666L);
if(fd >= 0)
fprint(fd, "%s%s\n", out? "out: " : "in: ", s);
}
void
journaln(int out, long n)
{
char buf[32];
snprint(buf, sizeof(buf), "%ld", n);
journal(out, buf);
}
void
journalv(int out, vlong v)
{
char buf[32];
sprint(buf, sizeof(buf), "%lld", v);
journal(out, buf);
}
#else
#define journal(a, b)
#define journaln(a, b)
#define journalv(a, b)
#endif
int
rcvchar(void){
static uchar buf[64];
static i, nleft = 0;
if(nleft <= 0){
nleft = read(0, (char *)buf, sizeof buf);
if(nleft <= 0)
return -1;
i = 0;
}
--nleft;
return buf[i++];
}
int
rcv(void){
int c;
static state = 0;
static count = 0;
static i = 0;
while((c=rcvchar()) != -1)
switch(state){
case 0:
h.type = c;
state++;
break;
case 1:
h.count0 = c;
state++;
break;
case 2:
h.count1 = c;
count = h.count0|(h.count1<<8);
i = 0;
if(count > DATASIZE)
panic("count>DATASIZE");
if(count == 0)
goto zerocount;
state++;
break;
case 3:
indata[i++] = c;
if(i == count){
zerocount:
indata[i] = 0;
state = count = 0;
return inmesg(h.type);
}
break;
}
return 0;
}
File *
whichfile(int tag)
{
int i;
for(i = 0; i<file.nused; i++)
if(file.filepptr[i]->tag==tag)
return file.filepptr[i];
hiccough((char *)0);
return 0;
}
int
inmesg(Tmesg type)
{
Rune buf[1025];
char cbuf[64];
int i, m;
short s;
long l, l1;
vlong v;
File *f;
Posn p0, p1, p;
Range r;
String *str;
char *c, *wdir;
Rune *rp;
Plumbmsg *pm;
if(type > TMAX)
panic("inmesg");
journal(0, tname[type]);
inp = indata;
switch(type){
case -1:
panic("rcv error");
default:
fprint(2, "unknown type %d\n", type);
panic("rcv unknown");
case Tversion:
tversion = inshort();
journaln(0, tversion);
break;
case Tstartcmdfile:
v = invlong(); /* for 64-bit pointers */
journalv(0, v);
Strdupl(&genstr, samname);
cmd = newfile();
cmd->unread = 0;
outTsv(Hbindname, cmd->tag, v);
outTs(Hcurrent, cmd->tag);
logsetname(cmd, &genstr);
cmd->rasp = listalloc('P');
cmd->mod = 0;
if(cmdstr.n){
loginsert(cmd, 0L, cmdstr.s, cmdstr.n);
Strdelete(&cmdstr, 0L, (Posn)cmdstr.n);
}
fileupdate(cmd, FALSE, TRUE);
outT0(Hunlock);
break;
case Tcheck:
/* go through whichfile to check the tag */
outTs(Hcheck, whichfile(inshort())->tag);
break;
case Trequest:
f = whichfile(inshort());
p0 = inlong();
p1 = p0+inshort();
journaln(0, p0);
journaln(0, p1-p0);
if(f->unread)
panic("Trequest: unread");
if(p1>f->nc)
p1 = f->nc;
if(p0>f->nc) /* can happen e.g. scrolling during command */
p0 = f->nc;
if(p0 == p1){
i = 0;
r.p1 = r.p2 = p0;
}else{
r = rdata(f->rasp, p0, p1-p0);
i = r.p2-r.p1;
bufread(f, r.p1, buf, i);
}
buf[i]=0;
outTslS(Hdata, f->tag, r.p1, tmprstr(buf, i+1));
break;
case Torigin:
s = inshort();
l = inlong();
l1 = inlong();
journaln(0, l1);
lookorigin(whichfile(s), l, l1);
break;
case Tstartfile:
termlocked++;
f = whichfile(inshort());
if(!f->rasp) /* this might be a duplicate message */
f->rasp = listalloc('P');
current(f);
outTsv(Hbindname, f->tag, invlong()); /* for 64-bit pointers */
outTs(Hcurrent, f->tag);
journaln(0, f->tag);
if(f->unread)
load(f);
else{
if(f->nc>0){
rgrow(f->rasp, 0L, f->nc);
outTsll(Hgrow, f->tag, 0L, f->nc);
}
outTs(Hcheck0, f->tag);
moveto(f, f->dot.r);
}
break;
case Tworkfile:
i = inshort();
f = whichfile(i);
current(f);
f->dot.r.p1 = inlong();
f->dot.r.p2 = inlong();
f->tdot = f->dot.r;
journaln(0, i);
journaln(0, f->dot.r.p1);
journaln(0, f->dot.r.p2);
break;
case Ttype:
f = whichfile(inshort());
p0 = inlong();
journaln(0, p0);
journal(0, (char*)inp);
str = tmpcstr((char*)inp);
i = str->n;
loginsert(f, p0, str->s, str->n);
if(fileupdate(f, FALSE, FALSE))
seq++;
if(f==cmd && p0==f->nc-i && i>0 && str->s[i-1]=='\n'){
freetmpstr(str);
termlocked++;
termcommand();
}else
freetmpstr(str);
f->dot.r.p1 = f->dot.r.p2 = p0+i; /* terminal knows this already */
f->tdot = f->dot.r;
break;
case Tcut:
f = whichfile(inshort());
p0 = inlong();
p1 = inlong();
journaln(0, p0);
journaln(0, p1);
logdelete(f, p0, p1);
if(fileupdate(f, FALSE, FALSE))
seq++;
f->dot.r.p1 = f->dot.r.p2 = p0;
f->tdot = f->dot.r; /* terminal knows the value of dot already */
break;
case Tpaste:
f = whichfile(inshort());
p0 = inlong();
journaln(0, p0);
for(l=0; l<snarfbuf.nc; l+=m){
m = snarfbuf.nc-l;
if(m>BLOCKSIZE)
m = BLOCKSIZE;
bufread(&snarfbuf, l, genbuf, m);
loginsert(f, p0, tmprstr(genbuf, m)->s, m);
}
if(fileupdate(f, FALSE, TRUE))
seq++;
f->dot.r.p1 = p0;
f->dot.r.p2 = p0+snarfbuf.nc;
f->tdot.p1 = -1; /* force telldot to tell (arguably a BUG) */
telldot(f);
outTs(Hunlockfile, f->tag);
break;
case Tsnarf:
i = inshort();
p0 = inlong();
p1 = inlong();
snarf(whichfile(i), p0, p1, &snarfbuf, 0);
break;
case Tstartnewfile:
v = invlong();
Strdupl(&genstr, empty);
f = newfile();
f->rasp = listalloc('P');
outTsv(Hbindname, f->tag, v);
logsetname(f, &genstr);
outTs(Hcurrent, f->tag);
current(f);
load(f);
break;
case Twrite:
termlocked++;
i = inshort();
journaln(0, i);
f = whichfile(i);
addr.r.p1 = 0;
addr.r.p2 = f->nc;
if(f->name.s[0] == 0)
error(Enoname);
Strduplstr(&genstr, &f->name);
writef(f);
break;
case Tclose:
termlocked++;
i = inshort();
journaln(0, i);
f = whichfile(i);
current(f);
trytoclose(f);
/* if trytoclose fails, will error out */
delete(f);
break;
case Tlook:
f = whichfile(inshort());
termlocked++;
p0 = inlong();
p1 = inlong();
journaln(0, p0);
journaln(0, p1);
setgenstr(f, p0, p1);
for(l = 0; l<genstr.n; l++){
i = genstr.s[l];
if(utfrune(".*+?(|)\\[]^$", i)){
str = tmpcstr("\\");
Strinsert(&genstr, str, l++);
freetmpstr(str);
}
}
Straddc(&genstr, '\0');
nextmatch(f, &genstr, p1, 1);
moveto(f, sel.p[0]);
break;
case Tsearch:
termlocked++;
if(curfile == 0)
error(Enofile);
if(lastpat.s[0] == 0)
panic("Tsearch");
nextmatch(curfile, &lastpat, curfile->dot.r.p2, 1);
moveto(curfile, sel.p[0]);
break;
case Tsend:
termlocked++;
inshort(); /* ignored */
p0 = inlong();
p1 = inlong();
setgenstr(cmd, p0, p1);
bufreset(&snarfbuf);
bufinsert(&snarfbuf, (Posn)0, genstr.s, genstr.n);
outTl(Hsnarflen, genstr.n);
if(genstr.s[genstr.n-1] != '\n')
Straddc(&genstr, '\n');
loginsert(cmd, cmd->nc, genstr.s, genstr.n);
fileupdate(cmd, FALSE, TRUE);
cmd->dot.r.p1 = cmd->dot.r.p2 = cmd->nc;
telldot(cmd);
termcommand();
break;
case Tdclick:
f = whichfile(inshort());
p1 = inlong();
doubleclick(f, p1);
f->tdot.p1 = f->tdot.p2 = p1;
telldot(f);
outTs(Hunlockfile, f->tag);
break;
case Tstartsnarf:
if (snarfbuf.nc <= 0) { /* nothing to export */
outTs(Hsetsnarf, 0);
break;
}
c = 0;
i = 0;
m = snarfbuf.nc;
if(m > SNARFSIZE) {
m = SNARFSIZE;
dprint("?warning: snarf buffer truncated\n");
}
rp = malloc(m*sizeof(Rune));
if(rp){
bufread(&snarfbuf, 0, rp, m);
c = Strtoc(tmprstr(rp, m));
free(rp);
i = strlen(c);
}
outTs(Hsetsnarf, i);
if(c){
Write(1, c, i);
free(c);
} else
dprint("snarf buffer too long\n");
break;
case Tsetsnarf:
m = inshort();
if(m > SNARFSIZE)
error(Etoolong);
c = malloc(m+1);
if(c){
for(i=0; i<m; i++)
c[i] = rcvchar();
c[m] = 0;
str = tmpcstr(c);
free(c);
bufreset(&snarfbuf);
bufinsert(&snarfbuf, (Posn)0, str->s, str->n);
freetmpstr(str);
outT0(Hunlock);
}
break;
case Tack:
waitack = 0;
break;
case Tplumb:
f = whichfile(inshort());
p0 = inlong();
p1 = inlong();
pm = emalloc(sizeof(Plumbmsg));
pm->src = strdup("sam");
pm->dst = 0;
/* construct current directory */
c = Strtoc(&f->name);
if(c[0] == '/')
pm->wdir = c;
else{
wdir = emalloc(1024);
getwd(wdir, 1024);
pm->wdir = emalloc(1024);
snprint(pm->wdir, 1024, "%s/%s", wdir, c);
cleanname(pm->wdir);
free(wdir);
free(c);
}
c = strrchr(pm->wdir, '/');
if(c)
*c = '\0';
pm->type = strdup("text");
if(p1 > p0)
pm->attr = nil;
else{
p = p0;
while(p0>0 && (i=filereadc(f, p0 - 1))!=' ' && i!='\t' && i!='\n')
p0--;
while(p1<f->nc && (i=filereadc(f, p1))!=' ' && i!='\t' && i!='\n')
p1++;
sprint(cbuf, "click=%ld", p-p0);
pm->attr = plumbunpackattr(cbuf);
}
if(p0==p1 || p1-p0>=BLOCKSIZE){
plumbfree(pm);
break;
}
setgenstr(f, p0, p1);
pm->data = Strtoc(&genstr);
pm->ndata = strlen(pm->data);
c = plumbpack(pm, &i);
if(c != 0){
outTs(Hplumb, i);
Write(1, c, i);
free(c);
}
plumbfree(pm);
break;
case Texit:
exits(0);
}
return TRUE;
}
void
snarf(File *f, Posn p1, Posn p2, Buffer *buf, int emptyok)
{
Posn l;
int i;
if(!emptyok && p1==p2)
return;
bufreset(buf);
/* Stage through genbuf to avoid compaction problems (vestigial) */
if(p2 > f->nc){
fprint(2, "bad snarf addr p1=%ld p2=%ld f->nc=%d\n", p1, p2, f->nc); /*ZZZ should never happen, can remove */
p2 = f->nc;
}
for(l=p1; l<p2; l+=i){
i = p2-l>BLOCKSIZE? BLOCKSIZE : p2-l;
bufread(f, l, genbuf, i);
bufinsert(buf, buf->nc, tmprstr(genbuf, i)->s, i);
}
}
int
inshort(void)
{
ushort n;
n = inp[0] | (inp[1]<<8);
inp += 2;
return n;
}
long
inlong(void)
{
ulong n;
n = inp[0] | (inp[1]<<8) | (inp[2]<<16) | (inp[3]<<24);
inp += 4;
return n;
}
vlong
invlong(void)
{
vlong v;
v = (inp[7]<<24) | (inp[6]<<16) | (inp[5]<<8) | inp[4];
v = (v<<16) | (inp[3]<<8) | inp[2];
v = (v<<16) | (inp[1]<<8) | inp[0];
inp += 8;
return v;
}
void
setgenstr(File *f, Posn p0, Posn p1)
{
if(p0 != p1){
if(p1-p0 >= TBLOCKSIZE)
error(Etoolong);
Strinsure(&genstr, p1-p0);
bufread(f, p0, genbuf, p1-p0);
memmove(genstr.s, genbuf, RUNESIZE*(p1-p0));
genstr.n = p1-p0;
}else{
if(snarfbuf.nc == 0)
error(Eempty);
if(snarfbuf.nc > TBLOCKSIZE)
error(Etoolong);
bufread(&snarfbuf, (Posn)0, genbuf, snarfbuf.nc);
Strinsure(&genstr, snarfbuf.nc);
memmove(genstr.s, genbuf, RUNESIZE*snarfbuf.nc);
genstr.n = snarfbuf.nc;
}
}
void
outT0(Hmesg type)
{
outstart(type);
outsend();
}
void
outTl(Hmesg type, long l)
{
outstart(type);
outlong(l);
outsend();
}
void
outTs(Hmesg type, int s)
{
outstart(type);
journaln(1, s);
outshort(s);
outsend();
}
void
outS(String *s)
{
char *c;
int i;
c = Strtoc(s);
i = strlen(c);
outcopy(i, c);
if(i > 99)
c[99] = 0;
journaln(1, i);
journal(1, c);
free(c);
}
void
outTsS(Hmesg type, int s1, String *s)
{
outstart(type);
outshort(s1);
outS(s);
outsend();
}
void
outTslS(Hmesg type, int s1, Posn l1, String *s)
{
outstart(type);
outshort(s1);
journaln(1, s1);
outlong(l1);
journaln(1, l1);
outS(s);
outsend();
}
void
outTS(Hmesg type, String *s)
{
outstart(type);
outS(s);
outsend();
}
void
outTsllS(Hmesg type, int s1, Posn l1, Posn l2, String *s)
{
outstart(type);
outshort(s1);
outlong(l1);
outlong(l2);
journaln(1, l1);
journaln(1, l2);
outS(s);
outsend();
}
void
outTsll(Hmesg type, int s, Posn l1, Posn l2)
{
outstart(type);
outshort(s);
outlong(l1);
outlong(l2);
journaln(1, l1);
journaln(1, l2);
outsend();
}
void
outTsl(Hmesg type, int s, Posn l)
{
outstart(type);
outshort(s);
outlong(l);
journaln(1, l);
outsend();
}
void
outTsv(Hmesg type, int s, vlong v)
{
outstart(type);
outshort(s);
outvlong(v);
journalv(1, v);
outsend();
}
void
outstart(Hmesg type)
{
journal(1, hname[type]);
outmsg[0] = type;
outp = outmsg+3;
}
void
outcopy(int count, void *data)
{
memmove(outp, data, count);
outp += count;
}
void
outshort(int s)
{
*outp++ = s;
*outp++ = s>>8;
}
void
outlong(long l)
{
*outp++ = l;
*outp++ = l>>8;
*outp++ = l>>16;
*outp++ = l>>24;
}
void
outvlong(vlong v)
{
int i;
for(i = 0; i < 8; i++){
*outp++ = v;
v >>= 8;
}
}
void
outsend(void)
{
int outcount;
if(outp >= outdata+nelem(outdata))
panic("outsend");
outcount = outp-outmsg;
outcount -= 3;
outmsg[1] = outcount;
outmsg[2] = outcount>>8;
outmsg = outp;
if(!outbuffered){
outcount = outmsg-outdata;
if (write(1, (char*) outdata, outcount) != outcount)
rescue();
outmsg = outdata;
return;
}
}
int
needoutflush(void)
{
return outmsg >= outdata+DATASIZE;
}
void
outflush(void)
{
if(outmsg == outdata)
return;
outbuffered = 0;
/* flow control */
outT0(Hack);
waitack = 1;
do
if(rcv() == 0){
rescue();
exits("eof");
}
while(waitack);
outmsg = outdata;
outbuffered = 1;
}