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/* ISC license. */
#include <sys/types.h>
#include <sys/uio.h>
#include <stdint.h>
#include <errno.h>
#include <skalibs/gccattributes.h>
#include <skalibs/uint16.h>
#include <skalibs/genalloc.h>
#include <skalibs/gensetdyn.h>
#include <skalibs/textclient.h>
#include <s6/ftrigr.h>
#include <skalibs/posixishard.h>
static inline int appears (uint16_t, uint16_t const *, size_t) gccattr_pure ;
static inline int appears (uint16_t id, uint16_t const *list, size_t len)
{
while (len) if (id == list[--len]) return 1 ;
return 0 ;
}
static int msghandler (struct iovec const *v, void *context)
{
ftrigr_t *a = (ftrigr_t *)context ;
ftrigr1_t *p ;
int addit = 1 ;
char const *s = v->iov_base ;
uint16_t id ;
if (v->iov_len != 4) return (errno = EPROTO, 0) ;
uint16_unpack_big(s, &id) ;
p = GENSETDYN_P(ftrigr1_t, &a->data, id) ;
if (!p) return 1 ;
if (p->state != FR1STATE_LISTENING) return (errno = EINVAL, 0) ;
if (!genalloc_readyplus(uint16_t, &a->list, 1)) return 0 ;
switch (s[2])
{
case 'd' :
if (!stralloc_catb(&p->what, s + 3, 1)) return 0 ;
p->state = FR1STATE_WAITACK ;
break ;
case '!' :
if (!stralloc_catb(&p->what, s + 3, 1)) return 0 ;
if (p->options & FTRIGR_REPEAT)
{
if (p->what.len > 1
&& appears(id+1, genalloc_s(uint16_t, &a->list), genalloc_len(uint16_t, &a->list)))
addit = 0 ;
}
else p->state = FR1STATE_WAITACKDATA ;
break ;
default : return (errno = EPROTO, 0) ;
}
if (addit)
{
id++ ; genalloc_append(uint16_t, &a->list, &id) ;
}
return 1 ;
}
int ftrigr_updateb (ftrigr_t *a)
{
size_t curlen = genalloc_len(uint16_t, &a->list) ;
int r = textclient_update(&a->connection, &msghandler, a) ;
return r < 0 ? r : (int)(genalloc_len(uint16_t, &a->list) - curlen) ;
}
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