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#include <u.h>
#include <libc.h>
#include <bio.h>
#include "modem.h"
static long wd[5] = {
1728, 2048, 2432, 1216, 864
};
void
setpageid(char *pageid, char *spool, long time, int pid, int pageno)
{
sprint(pageid, "%s/%lud.%d.%3.3d", spool, time, pid, pageno);
}
int
createfaxfile(Modem *m, char *spool)
{
setpageid(m->pageid, spool, m->time, m->pid, m->pageno);
verbose("openfaxfile: %s", m->pageid);
if((m->pagefd = create(m->pageid, OTRUNC|OWRITE, 0666)) < 0)
return seterror(m, Esys);
fprint(m->pagefd, "TYPE=ccitt-g31\n");
fprint(m->pagefd, "WINDOW=0 0 %ld -1\n", wd[m->fdcs[2]]);
if(m->valid & Vftsi)
fprint(m->pagefd, "FTSI=%s\n", m->ftsi);
fprint(m->pagefd, "FDCS=%lud,%lud,%lud,%lud,%lud,%lud,%lud,%lud\n",
m->fdcs[0], m->fdcs[1], m->fdcs[2], m->fdcs[3],
m->fdcs[4], m->fdcs[5], m->fdcs[6], m->fdcs[7]);
fprint(m->pagefd, "\n");
return Eok;
}
enum
{
Gshdrsize= 0x40,
};
int
gsopen(Modem *m)
{
int n;
char bytes[Gshdrsize];
/*
* Is this gs output
*/
n = Bread(m->bp, bytes, Gshdrsize);
if(n != Gshdrsize)
return seterror(m, Esys);
if(bytes[0]!='\0' || strcmp(bytes+1, "PC Research, Inc")!=0){
Bseek(m->bp, 0, 0);
return seterror(m, Esys);
}
m->valid |= Vtype;
if(bytes[0x1d])
m->vr = 1;
else
m->vr = 0;
m->wd = 0;
m->ln = 2;
m->df = 0;
return Eok;
}
int
picopen(Modem *m)
{
char *p, *q;
int i, x;
/*
* Look at the header. Every page should have a valid type.
* The first page should have WINDOW.
*/
while(p = Brdline(m->bp, '\n')){
if(Blinelen(m->bp) == 1)
break;
p[Blinelen(m->bp)-1] = 0;
verbose("openfaxfile: %s", p);
if(strcmp("TYPE=ccitt-g31", p) == 0)
m->valid |= Vtype;
/*
else if(m->pageno == 1 && strncmp("PHONE=", p, 6) == 0){
strcpy(m->number, p+6);
m->valid |= Vphone;
}
*/
else if(m->pageno == 1 && strncmp("WINDOW=", p, 7) == 0){
p += 7;
verbose("openfaxfile: WINDOW: %s", p);
for(i = 0; i < 4; i++){
x = strtol(p, &q, 10);
if(i == 2)
m->wd = x;
if((p = q) == 0){
Bterm(m->bp);
return seterror(m, Eproto);
}
}
for(i = 0; i < 5; i++){
if(m->wd == wd[i]){
m->wd = i;
m->valid |= Vwd;
break;
}
}
if((m->valid & Vwd) == 0){
Bterm(m->bp);
return seterror(m, Eproto);
}
}
else if(m->pageno == 1 && strncmp("FDCS=", p, 5) == 0){
p += 5;
m->df = m->vr = m->wd = 0;
m->ln = 2;
for(i = 0; i < 5; i++){
x = strtol(p, &q, 10);
switch(i){
case 0:
m->vr = x;
break;
case 3:
m->ln = x;
break;
case 4:
m->df = x;
break;
}
if((p = q) == 0){
Bterm(m->bp);
return seterror(m, Eproto);
}
if(*p++ != ',')
break;
}
}
}
verbose("openfaxfile: valid #%4.4ux", m->valid);
if((m->valid & (Vtype|Vwd)) != (Vtype|Vwd)){
Bterm(m->bp);
return seterror(m, Eproto);
}
return Eok;
}
int
openfaxfile(Modem *m, char *file)
{
if((m->bp = Bopen(file, OREAD)) == 0)
return seterror(m, Esys);
m->valid &= ~(Vtype);
if(gsopen(m) == Eok)
return Eok;
return picopen(m);
}
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