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/* ISC license. */
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <skalibs/alloc.h>
#include <skalibs/genalloc.h>
#include <skalibs/buffer.h>
#include <skalibs/djbunix.h>
#include <s6-rc/db.h>
#include "state.h"
void state_free (state_t *st, uint32_t const *dbn)
{
for (s6rc_stype_t type = S6RC_STYPE_LONGRUN ; type < S6RC_STYPE_PHAIL ; type++)
{
alloc_free(st->sta[type]) ;
for (size_t i = 0 ; i < dbn[S6RC_STYPE_PHAIL + type] ; i++)
genalloc_free(instance_t, st->dyn[type] + i) ;
alloc_free(st->dyn[type]) ;
}
}
int state_ready (state_t *st, uint32_t const *dbn)
{
s6rc_stype_t type = 0 ;
for (; type < S6RC_STYPE_PHAIL ; type++)
{
genalloc *q ;
stateatom_t *p = alloc(sizeof(stateatom_t) * dbn[type]) ;
if (!p) goto err ;
q = alloc(sizeof(genalloc) * dbn[S6RC_STYPE_PHAIL + type]) ;
if (!q) { alloc_free(p) ; goto err ; }
st->sta[type] = p ;
for (size_t i = 0 ; i < dbn[S6RC_STYPE_PHAIL + type] ; i++) q[i] = genalloc_zero ;
st->dyn[type] = q ;
}
return 1 ;
err:
while (type--)
{
alloc_free(st->dyn[type]) ;
alloc_free(st->sta[type]) ;
}
return 0 ;
}
stateatom_t *state_atom (state_t const *st, s6rc_sid_t const *id)
{
if (id->param)
{
size_t n = genalloc_len(instance_t, st->dyn[id->stype] + id->i) ;
instance_t *instances = genalloc_s(instance_t, st->dyn[id->stype] + id->i) ;
for (size_t i = 0 ; i < n ; i++)
if (!strcmp(id->param, instances[i].param)) return &instances[i].state ;
return 0 ;
}
else return st->sta[id->stype] + id->i ;
}
static int atom_write (buffer *b, stateatom_t const *state)
{
char c = state->wanted | (state->current << 1) | (state->transitioning << 2) ;
return buffer_put(b, &c, 1) == 1 ;
}
int state_write (char const *file, state_t const *st, uint32_t const *dbn)
{
size_t filelen = strlen(file) ;
int fd ;
buffer b ;
char buf[1024] ;
char fn[filelen + 12] ;
memcpy(fn, file, filelen) ;
memcpy(fn + filelen, ":tmp:XXXXXX", 12) ;
fd = mkstemp(fn) ;
if (fd == -1) return 0 ;
buffer_init(&b, &buffer_write, fd, buf, 1024) ;
for (s6rc_stype_t type = 0 ; type < S6RC_STYPE_PHAIL ; type++)
{
char pack[4] ;
uint32_pack_big(pack, dbn[type]) ;
if (buffer_put(&b, pack, 4) < 4) goto err ;
}
for (s6rc_stype_t type = 0 ; type < S6RC_STYPE_PHAIL ; type++)
{
for (uint32_t i = 0 ; i < dbn[type] ; i++)
if (!atom_write(&b, st->sta[type] + i)) goto err ;
for (uint32_t i = 0 ; i < dbn[S6RC_STYPE_PHAIL + type] ; i++)
{
uint32_t n = genalloc_len(instance_t, st->dyn[type] + i) ;
instance_t const *p = genalloc_s(instance_t, st->dyn[type] + i) ;
char pack[4] ;
uint32_pack_big(pack, n) ;
if (buffer_put(&b, pack, 4) < 4) goto err ;
for (uint32_t j = 0 ; j < n ; j++)
{
uint32_t len = strlen(p[j].param) ;
uint32_pack_big(pack, len) ;
if (!atom_write(&p[j].state)) goto err ;
if (buffer_put(&b, pack, 4) < 4) goto err ;
if (buffer_put(&b, p[j].param, len+1) < len+1) goto err ;
}
}
}
if (!buffer_flush(&b)) goto err ;
fd_close(fd) ;
if (rename(fn, file) == -1) goto err0 ;
return 1 ;
err:
fd_close(fd) ;
err0:
unlink_void(fn) ;
return 0 ;
}
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