1 a0d146ed 2005-07-12 devnull #include "stdinc.h"
 2 a0d146ed 2005-07-12 devnull #include "dat.h"
 3 a0d146ed 2005-07-12 devnull #include "fns.h"
 4 a0d146ed 2005-07-12 devnull 
 5 a0d146ed 2005-07-12 devnull void
 6 a0d146ed 2005-07-12 devnull fmtzbinit(Fmt *f, ZBlock *b)
 7 a0d146ed 2005-07-12 devnull {
 8 a0d146ed 2005-07-12 devnull 	f->runes = 0;
 9 a0d146ed 2005-07-12 devnull 	f->start = b->data;
10 a0d146ed 2005-07-12 devnull 	f->to = f->start;
11 a0d146ed 2005-07-12 devnull 	f->stop = (char*)f->start + b->len;
12 a0d146ed 2005-07-12 devnull 	f->flush = nil;
13 a0d146ed 2005-07-12 devnull 	f->farg = nil;
14 a0d146ed 2005-07-12 devnull 	f->nfmt = 0;
15 a0d146ed 2005-07-12 devnull }
16 a0d146ed 2005-07-12 devnull 
17 d67cd5c3 2005-07-19 devnull #define ROUNDUP(p, n) ((void*)(((uintptr)(p)+(n)-1)&~(uintptr)((n)-1)))
18 a0d146ed 2005-07-12 devnull 
19 a0d146ed 2005-07-12 devnull static char zmagic[] = "1234567890abcdefghijkl";
20 a0d146ed 2005-07-12 devnull 
21 a0d146ed 2005-07-12 devnull ZBlock *
22 a0d146ed 2005-07-12 devnull alloczblock(u32int size, int zeroed, uint blocksize)
23 a0d146ed 2005-07-12 devnull {
24 a0d146ed 2005-07-12 devnull 	uchar *p, *data;
25 a0d146ed 2005-07-12 devnull 	ZBlock *b;
26 a0d146ed 2005-07-12 devnull 	static ZBlock z;
27 a0d146ed 2005-07-12 devnull 	int n;
28 a0d146ed 2005-07-12 devnull 
29 a0d146ed 2005-07-12 devnull 	if(blocksize == 0)
30 a0d146ed 2005-07-12 devnull 		blocksize = 32;	/* try for cache line alignment */
31 a0d146ed 2005-07-12 devnull 
32 a0d146ed 2005-07-12 devnull 	n = size+32/*XXX*/+sizeof(ZBlock)+blocksize+8;
33 a0d146ed 2005-07-12 devnull 	p = malloc(n);
34 a0d146ed 2005-07-12 devnull 	if(p == nil){
35 a0d146ed 2005-07-12 devnull 		seterr(EOk, "out of memory");
36 a0d146ed 2005-07-12 devnull 		return nil;
37 a0d146ed 2005-07-12 devnull 	}
38 a0d146ed 2005-07-12 devnull 
39 a0d146ed 2005-07-12 devnull 	data = ROUNDUP(p, blocksize);
40 a0d146ed 2005-07-12 devnull 	b = ROUNDUP(data+size+32/*XXX*/, 8);
41 a0d146ed 2005-07-12 devnull 	if(0) fprint(2, "alloc %p-%p data %p-%p b %p-%p\n",
42 a0d146ed 2005-07-12 devnull 		p, p+n, data, data+size, b, b+1);
43 a0d146ed 2005-07-12 devnull 	*b = z;
44 a0d146ed 2005-07-12 devnull 	b->data = data;
45 a0d146ed 2005-07-12 devnull 	b->free = p;
46 a0d146ed 2005-07-12 devnull 	b->len = size;
47 a0d146ed 2005-07-12 devnull 	b->_size = size;
48 a0d146ed 2005-07-12 devnull 	if(zeroed)
49 a0d146ed 2005-07-12 devnull 		memset(b->data, 0, size);
50 a0d146ed 2005-07-12 devnull 	memmove(b->data+size, zmagic, 32/*XXX*/);
51 a0d146ed 2005-07-12 devnull 	return b;
52 a0d146ed 2005-07-12 devnull }
53 a0d146ed 2005-07-12 devnull 
54 a0d146ed 2005-07-12 devnull void
55 a0d146ed 2005-07-12 devnull freezblock(ZBlock *b)
56 a0d146ed 2005-07-12 devnull {
57 a0d146ed 2005-07-12 devnull 	if(b){
58 a0d146ed 2005-07-12 devnull 		if(memcmp(b->data+b->_size, zmagic, 32) != 0)
59 a0d146ed 2005-07-12 devnull 			abort();
60 a0d146ed 2005-07-12 devnull 		memset(b->data+b->_size, 0, 32);
61 a0d146ed 2005-07-12 devnull 		free(b->free);
62 a0d146ed 2005-07-12 devnull 	}
63 a0d146ed 2005-07-12 devnull }
64 a0d146ed 2005-07-12 devnull 
65 a0d146ed 2005-07-12 devnull ZBlock*
66 a0d146ed 2005-07-12 devnull packet2zblock(Packet *p, u32int size)
67 a0d146ed 2005-07-12 devnull {
68 a0d146ed 2005-07-12 devnull 	ZBlock *b;
69 a0d146ed 2005-07-12 devnull 
70 a0d146ed 2005-07-12 devnull 	if(p == nil)
71 a0d146ed 2005-07-12 devnull 		return nil;
72 a0d146ed 2005-07-12 devnull 	b = alloczblock(size, 0, 0);
73 a0d146ed 2005-07-12 devnull 	if(b == nil)
74 a0d146ed 2005-07-12 devnull 		return nil;
75 a0d146ed 2005-07-12 devnull 	if(packetcopy(p, b->data, 0, size) < 0){
76 a0d146ed 2005-07-12 devnull 		freezblock(b);
77 a0d146ed 2005-07-12 devnull 		return nil;
78 a0d146ed 2005-07-12 devnull 	}
79 a0d146ed 2005-07-12 devnull 	return b;
80 a0d146ed 2005-07-12 devnull }
81 a0d146ed 2005-07-12 devnull 
82 a0d146ed 2005-07-12 devnull Packet*
83 a0d146ed 2005-07-12 devnull zblock2packet(ZBlock *zb, u32int size)
84 a0d146ed 2005-07-12 devnull {
85 a0d146ed 2005-07-12 devnull 	Packet *p;
86 a0d146ed 2005-07-12 devnull 
87 a0d146ed 2005-07-12 devnull 	if(zb == nil)
88 a0d146ed 2005-07-12 devnull 		return nil;
89 a0d146ed 2005-07-12 devnull 	p = packetalloc();
90 a0d146ed 2005-07-12 devnull 	packetappend(p, zb->data, size);
91 a0d146ed 2005-07-12 devnull 	return p;
92 a0d146ed 2005-07-12 devnull }
93 a0d146ed 2005-07-12 devnull