int
_citrus_db_open(struct _citrus_db **rdb, struct _region *r, const char *magic,
_citrus_db_hash_func_t hashfunc, void *hashfunc_closure)
{
struct _citrus_db *db;
struct _citrus_db_header_x *dhx;
struct _memstream ms;
_memstream_bind(&ms, r);
/* sanity check */
dhx = _memstream_getregion(&ms, NULL, sizeof(*dhx));
if (dhx == NULL)
return (EFTYPE);
if (strncmp(dhx->dhx_magic, magic, _CITRUS_DB_MAGIC_SIZE) != 0)
return (EFTYPE);
if (_memstream_seek(&ms, be32toh(dhx->dhx_entry_offset), SEEK_SET))
return (EFTYPE);
if (be32toh(dhx->dhx_num_entries)*_CITRUS_DB_ENTRY_SIZE >
_memstream_remainder(&ms))
return (EFTYPE);
db = malloc(sizeof(*db));
if (db == NULL)
return (errno);
db->db_region = *r;
db->db_hashfunc = hashfunc;
db->db_hashfunc_closure = hashfunc_closure;
*rdb = db;
return (0);
}
static int
parse_var(struct _citrus_mapper_646 *m6, struct _memstream *ms,
const char *dir)
{
struct _region r;
char path[PATH_MAX];
m6->m6_forward = 1;
_memstream_skip_ws(ms);
/* whether backward */
if (_memstream_peek(ms) == '!') {
_memstream_getc(ms);
m6->m6_forward = 0;
}
/* get description file path */
_memstream_getregion(ms, &r, _memstream_remainder(ms));
snprintf(path, sizeof(path), "%s/%.*s",
dir, (int)_region_size(&r), (char *)_region_head(&r));
/* remove trailing white spaces */
path[_bcs_skip_nonws(path)-path] = '\0';
return (parse_file(m6, path));
}
