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Member "slirp-1.0.16/src/ppp/bsd-comp.h" of archive slirp-1.0.16.tar.gz:
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1 /*
2 * A dictionary for doing BSD compress.
3 */
4 struct bsd_db {
5 int totlen; /* length of this structure */
6 u_int hsize; /* size of the hash table */
7 u_char hshift; /* used in hash function */
8 u_char n_bits; /* current bits/code */
9 u_char maxbits;
10 u_char debug;
11 u_char unit;
12 u_int16_t seqno; /* sequence # of next packet */
13 u_int hdrlen; /* header length to preallocate */
14 u_int mru;
15 u_int maxmaxcode; /* largest valid code */
16 u_int max_ent; /* largest code in use */
17 u_int in_count; /* uncompressed bytes, aged */
18 u_int bytes_out; /* compressed bytes, aged */
19 u_int ratio; /* recent compression ratio */
20 u_int checkpoint; /* when to next check the ratio */
21 u_int clear_count; /* times dictionary cleared */
22 u_int incomp_count; /* incompressible packets */
23 u_int incomp_bytes; /* incompressible bytes */
24 u_int uncomp_count; /* uncompressed packets */
25 u_int uncomp_bytes; /* uncompressed bytes */
26 u_int comp_count; /* compressed packets */
27 u_int comp_bytes; /* compressed bytes */
28 u_int16_t *lens; /* array of lengths of codes */
29 struct bsd_dict {
30 union {
31 /* hash value */
32 u_int32_t fcode;
33 struct {
34 #ifdef WORDS_BIGENDIAN
35 u_char pad;
36 u_char suffix; /* last character of new code */
37 u_int16_t prefix; /* preceding code */
38 #else
39 u_int16_t prefix; /* preceding code */
40 u_char suffix; /* last character of new code */
41 u_char pad;
42 #endif
43 } hs;
44 } f;
45 u_int16_t codem1; /* output of hash table -1 */
46 u_int16_t cptr; /* map code to hash table entry */
47 } dict[1];
48 };
49