1 056fe1ba 2003-11-23 devnull #include <u.h>
 2 056fe1ba 2003-11-23 devnull #include <libc.h>
 3 056fe1ba 2003-11-23 devnull #include <venti.h>
 4 056fe1ba 2003-11-23 devnull #include "cvt.h"
 5 056fe1ba 2003-11-23 devnull 
 6 056fe1ba 2003-11-23 devnull static int
 7 056fe1ba 2003-11-23 devnull checksize(int n)
 8 056fe1ba 2003-11-23 devnull {
 9 056fe1ba 2003-11-23 devnull 	if(n < 256 || n > VtMaxLumpSize) {
10 056fe1ba 2003-11-23 devnull 		werrstr("bad block size");
11 056fe1ba 2003-11-23 devnull 		return -1;
12 056fe1ba 2003-11-23 devnull 	}
13 056fe1ba 2003-11-23 devnull 	return 0;
14 056fe1ba 2003-11-23 devnull }
15 056fe1ba 2003-11-23 devnull 
16 056fe1ba 2003-11-23 devnull void
17 056fe1ba 2003-11-23 devnull vtrootpack(VtRoot *r, uchar *p)
18 056fe1ba 2003-11-23 devnull {
19 056fe1ba 2003-11-23 devnull 	uchar *op = p;
20 056fe1ba 2003-11-23 devnull 
21 056fe1ba 2003-11-23 devnull 	U16PUT(p, VtRootVersion);
22 056fe1ba 2003-11-23 devnull 	p += 2;
23 056fe1ba 2003-11-23 devnull 	memmove(p, r->name, sizeof(r->name));
24 056fe1ba 2003-11-23 devnull 	p += sizeof(r->name);
25 056fe1ba 2003-11-23 devnull 	memmove(p, r->type, sizeof(r->type));
26 056fe1ba 2003-11-23 devnull 	p += sizeof(r->type);
27 056fe1ba 2003-11-23 devnull 	memmove(p, r->score, VtScoreSize);
28 056fe1ba 2003-11-23 devnull 	p +=  VtScoreSize;
29 056fe1ba 2003-11-23 devnull 	U16PUT(p, r->blocksize);
30 056fe1ba 2003-11-23 devnull 	p += 2;
31 056fe1ba 2003-11-23 devnull 	memmove(p, r->prev, VtScoreSize);
32 056fe1ba 2003-11-23 devnull 	p += VtScoreSize;
33 056fe1ba 2003-11-23 devnull 
34 056fe1ba 2003-11-23 devnull 	assert(p-op == VtRootSize);
35 056fe1ba 2003-11-23 devnull }
36 056fe1ba 2003-11-23 devnull 
37 056fe1ba 2003-11-23 devnull int
38 056fe1ba 2003-11-23 devnull vtrootunpack(VtRoot *r, uchar *p)
39 056fe1ba 2003-11-23 devnull {
40 056fe1ba 2003-11-23 devnull 	uchar *op = p;
41 056fe1ba 2003-11-23 devnull 	uint vers;
42 056fe1ba 2003-11-23 devnull 	memset(r, 0, sizeof(*r));
43 056fe1ba 2003-11-23 devnull 
44 056fe1ba 2003-11-23 devnull 	vers = U16GET(p);
45 056fe1ba 2003-11-23 devnull 	if(vers != VtRootVersion) {
46 056fe1ba 2003-11-23 devnull 		werrstr("unknown root version");
47 0c148046 2004-06-16 devnull 		return -1;
48 056fe1ba 2003-11-23 devnull 	}
49 056fe1ba 2003-11-23 devnull 	p += 2;
50 056fe1ba 2003-11-23 devnull 	memmove(r->name, p, sizeof(r->name));
51 056fe1ba 2003-11-23 devnull 	r->name[sizeof(r->name)-1] = 0;
52 056fe1ba 2003-11-23 devnull 	p += sizeof(r->name);
53 056fe1ba 2003-11-23 devnull 	memmove(r->type, p, sizeof(r->type));
54 056fe1ba 2003-11-23 devnull 	r->type[sizeof(r->type)-1] = 0;
55 056fe1ba 2003-11-23 devnull 	p += sizeof(r->type);
56 056fe1ba 2003-11-23 devnull 	memmove(r->score, p, VtScoreSize);
57 056fe1ba 2003-11-23 devnull 	p +=  VtScoreSize;
58 056fe1ba 2003-11-23 devnull 	r->blocksize = U16GET(p);
59 056fe1ba 2003-11-23 devnull 	if(checksize(r->blocksize) < 0)
60 056fe1ba 2003-11-23 devnull 		return -1;
61 056fe1ba 2003-11-23 devnull 	p += 2;
62 056fe1ba 2003-11-23 devnull 	memmove(r->prev, p, VtScoreSize);
63 056fe1ba 2003-11-23 devnull 	p += VtScoreSize;
64 056fe1ba 2003-11-23 devnull 
65 056fe1ba 2003-11-23 devnull 	assert(p-op == VtRootSize);
66 056fe1ba 2003-11-23 devnull 	return 0;
67 056fe1ba 2003-11-23 devnull }