1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
#include "readwrite.h"
#include "seek.h"
#include "alloc.h"
#include "cdbmss.h"
int cdbmss_start(c,fd)
struct cdbmss *c;
int fd;
{
cdbmake_init(&c->cdbm);
c->fd = fd;
c->pos = sizeof(c->cdbm.final);
substdio_fdbuf(&c->ss,write,fd,c->ssbuf,sizeof(c->ssbuf));
return seek_set(fd,(seek_pos) c->pos);
}
int cdbmss_add(c,key,keylen,data,datalen)
struct cdbmss *c;
unsigned char *key;
unsigned int keylen;
unsigned char *data;
unsigned int datalen;
{
uint32 h;
int i;
cdbmake_pack(c->packbuf,(uint32) keylen);
cdbmake_pack(c->packbuf + 4,(uint32) datalen);
if (substdio_put(&c->ss,c->packbuf,8) == -1) return -1;
if (substdio_put(&c->ss,key,keylen) == -1) return -1;
if (substdio_put(&c->ss,data,datalen) == -1) return -1;
h = CDBMAKE_HASHSTART;
for (i = 0;i < keylen;++i)
h = cdbmake_hashadd(h,(unsigned int) key[i]);
if (!cdbmake_add(&c->cdbm,h,c->pos,alloc)) return -1;
c->pos += 8 + keylen + datalen; /* XXX: overflow? */
return 0;
}
int cdbmss_finish(c)
struct cdbmss *c;
{
int i;
uint32 len;
uint32 u;
if (!cdbmake_split(&c->cdbm,alloc)) return -1;
for (i = 0;i < 256;++i) {
len = cdbmake_throw(&c->cdbm,c->pos,i);
for (u = 0;u < len;++u) {
cdbmake_pack(c->packbuf,c->cdbm.hash[u].h);
cdbmake_pack(c->packbuf + 4,c->cdbm.hash[u].p);
if (substdio_put(&c->ss,c->packbuf,8) == -1) return -1;
c->pos += 8; /* XXX: overflow? */
}
}
if (substdio_flush(&c->ss) == -1) return -1;
if (seek_begin(c->fd) == -1) return -1;
return substdio_putflush(&c->ss,c->cdbm.final,sizeof(c->cdbm.final));
}
|
