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/* ISC license. */
#include <sys/types.h>
#include <stdint.h>
#include <errno.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/buffer.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-transactional.h>
#include <s6-rc/s6rc-db.h>
static inline int s6rc_db_read_sizes_buffer (buffer *b, s6rc_db_t *db)
{
uint32_t x ;
if (!s6rc_db_read_uint32(b, &x)) return 0 ;
db->nshort = x ;
if (!s6rc_db_read_uint32(b, &x)) return 0 ;
db->nlong = x ;
if (!s6rc_db_read_uint32(b, &x)) return 0 ;
db->stringlen = x ;
if (!s6rc_db_read_uint32(b, &x)) return 0 ;
db->nargvs = x ;
if (!s6rc_db_read_uint32(b, &x)) return 0 ;
db->ndeps = x ;
return 1 ;
}
int s6rc_db_read_sizes (int fdcompiled, s6rc_db_t *db)
{
char buf[64] ;
buffer b ;
int fd = open_readatb(fdcompiled, "n") ;
if (fd < 0) return 0 ;
buffer_init(&b, &buffer_read, fd, buf, 64) ;
if (!s6rc_db_read_sizes_buffer(&b, db))
{
fd_close(fd) ;
return 0 ;
}
{
char c ;
ssize_t r = buffer_get(&b, &c, 1) ;
if (r < 0)
{
r = errno ;
fd_close(fd) ;
errno = r ;
return 0 ;
}
fd_close(fd) ;
if (r) return 0 ;
}
return 1 ;
}
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