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#include "std.h"
#include "dat.h"
void
lbkick(Logbuf *lb)
{
char *s;
int n;
Req *r;
while(lb->wait && lb->rp != lb->wp){
r = lb->wait;
lb->wait = r->aux;
if(lb->wait == nil)
lb->waitlast = &lb->wait;
r->aux = nil;
if(r->ifcall.count < 5){
respond(r, "factotum: read request count too short");
continue;
}
s = lb->msg[lb->rp];
lb->msg[lb->rp] = nil;
if(++lb->rp == nelem(lb->msg))
lb->rp = 0;
n = r->ifcall.count;
if(n < strlen(s)+1+1){
memmove(r->ofcall.data, s, n-5);
n -= 5;
r->ofcall.data[n] = '\0';
/* look for first byte of UTF-8 sequence by skipping continuation bytes */
while(n>0 && (r->ofcall.data[--n]&0xC0)==0x80)
;
strcpy(r->ofcall.data+n, "...\n");
}else{
strcpy(r->ofcall.data, s);
strcat(r->ofcall.data, "\n");
}
r->ofcall.count = strlen(r->ofcall.data);
free(s);
respond(r, nil);
}
}
void
lbread(Logbuf *lb, Req *r)
{
if(lb->waitlast == nil)
lb->waitlast = &lb->wait;
*lb->waitlast = r;
lb->waitlast = (Req**)(void*)&r->aux;
r->aux = nil;
lbkick(lb);
}
void
lbflush(Logbuf *lb, Req *r)
{
Req **l;
for(l=&lb->wait; *l; l=(Req**)(void*)&(*l)->aux){
if(*l == r){
*l = r->aux;
r->aux = nil;
if(*l == nil)
lb->waitlast = l;
closereq(r);
break;
}
}
}
void
lbappend(Logbuf *lb, char *fmt, ...)
{
va_list arg;
va_start(arg, fmt);
lbvappend(lb, fmt, arg);
va_end(arg);
}
void
lbvappend(Logbuf *lb, char *fmt, va_list arg)
{
char *s;
s = vsmprint(fmt, arg);
if(s == nil)
sysfatal("out of memory");
if(lb->msg[lb->wp])
free(lb->msg[lb->wp]);
lb->msg[lb->wp] = s;
if(++lb->wp == nelem(lb->msg))
lb->wp = 0;
lbkick(lb);
}
Logbuf logbuf;
void
logread(Req *r)
{
lbread(&logbuf, r);
}
void
logflush(Req *r)
{
lbflush(&logbuf, r);
}
void
flog(char *fmt, ...)
{
va_list arg;
va_start(arg, fmt);
lbvappend(&logbuf, fmt, arg);
va_end(arg);
}
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