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/*
media-filesystem object parse code
tridge@samba.org, January 2001
released under the Gnu GPL v2
*/
#include "mfs.h"
static int parse_attr(char *p, int obj_type, int fsid,
struct mfs_subobj_header *obj, object_fn fn)
{
struct mfs_attr_header *attr;
int ret;
attr = (struct mfs_attr_header *)p;
attr->len = ntohs(attr->len);
p += sizeof(*attr);
fn(fsid, obj, attr, p);
ret = (attr->len+3)&~3;
attr->len = htons(attr->len);
return ret;
}
static void parse_subobj(void *p, u16 type, int len, int fsid,
struct mfs_subobj_header *obj, object_fn fn)
{
int ofs=0;
while (ofs < len) {
ofs += parse_attr(p+ofs, type, fsid, obj, fn);
}
}
/* this is the low-level interface to parsing an object. It will call fn() on
all elements in all subobjects */
void vstream_parse_object(int fsid, void *buf, object_fn fn)
{
char *p;
u32 ofs;
struct mfs_obj_header *obj = buf;
int i=0;
vstream_byte_swap(obj, "i2");
p = buf;
ofs = sizeof(*obj);
/* now the subobjects */
while (ofs < obj->size) {
struct mfs_subobj_header *subobj = buf+ofs;
vstream_byte_swap(subobj, "s6 i1");
fn(fsid, subobj, NULL, NULL);
parse_subobj(buf+ofs+sizeof(*subobj),
subobj->obj_type,
subobj->len-sizeof(*subobj), fsid, subobj, fn);
ofs += subobj->len;
i++;
vstream_byte_swap(subobj, "s6 i1");
}
vstream_byte_swap(obj, "i2");
}
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