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/* ISC license. */
#include <stdint.h>
#include <skalibs/bitarray.h>
#include <s6-rc/s6rc-db.h>
#include <s6-rc/s6rc-utils.h>
typedef struct recinfo_s recinfo_t, *recinfo_t_ref ;
struct recinfo_s
{
s6rc_db_t const *db ;
unsigned char *bits ;
unsigned char statemask ;
unsigned char volmask ;
unsigned char resmask ;
} ;
static void s6rc_graph_clean_rec (recinfo_t *info, uint32_t i)
{
if (!(info->bits[i] & info->volmask))
{
uint32_t j = 0 ;
for (; j < info->db->services[i].ndeps[0] ; j++)
{
uint32_t k = info->db->deps[info->db->services[i].deps[0] + j] ;
if (info->bits[k] & info->statemask && !(info->bits[k] & info->resmask)) break ;
}
if (j >= info->db->services[i].ndeps[0])
{
info->bits[i] |= info->resmask ;
for (j = 0 ; j < info->db->services[i].ndeps[1] ; j++)
s6rc_graph_clean_rec(info, info->db->deps[info->db->ndeps + info->db->services[i].deps[1] + j]) ;
}
}
}
void s6rc_graph_clean (s6rc_db_t const *db, unsigned char *bits, unsigned int statebit, unsigned int volbit, unsigned int resbit)
{
uint32_t n = db->nshort + db->nlong ;
recinfo_t info = { .db = db, .bits = bits, .statemask = 1 << statebit, .volmask = 1 << volbit, .resmask = 1 << resbit } ;
for (uint32_t i = 0 ; i < n ; i++) bits[i] &= ~info.resmask ;
for (uint32_t i = 0 ; i < n ; i++) if (bits[i] & info.statemask) s6rc_graph_clean_rec(&info, i) ;
}
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