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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/* Copyright (c) 2014, Daniel Martí
* Copyright (c) 2014-2019, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#ifndef TOR_CONSDIFF_H
#define TOR_CONSDIFF_H
#include "core/or/or.h"
char *consensus_diff_generate(const char *cons1,
const char *cons2);
char *consensus_diff_apply(const char *consensus,
const char *diff);
int looks_like_a_consensus_diff(const char *document, size_t len);
#ifdef CONSDIFF_PRIVATE
#include "lib/container/bitarray.h"
struct memarea_t;
/** Line type used for constructing consensus diffs. Each of these lines
* refers to a chunk of memory allocated elsewhere, and is not necessarily
* NUL-terminated: this helps us avoid copies and save memory. */
typedef struct cdline_t {
const char *s;
uint32_t len;
} cdline_t;
typedef struct consensus_digest_t {
uint8_t sha3_256[DIGEST256_LEN];
} consensus_digest_t;
STATIC smartlist_t *consdiff_gen_diff(const smartlist_t *cons1,
const smartlist_t *cons2,
const consensus_digest_t *digests1,
const consensus_digest_t *digests2,
struct memarea_t *area);
STATIC char *consdiff_apply_diff(const smartlist_t *cons1,
const smartlist_t *diff,
const consensus_digest_t *digests1);
STATIC int consdiff_get_digests(const smartlist_t *diff,
char *digest1_out,
char *digest2_out);
/** Data structure to define a slice of a smarltist. */
typedef struct smartlist_slice_t {
/**
* Smartlist that this slice is made from.
* References the whole original smartlist that the slice was made out of.
* */
const smartlist_t *list;
/** Starting position of the slice in the smartlist. */
int offset;
/** Length of the slice, i.e. the number of elements it holds. */
int len;
} smartlist_slice_t;
STATIC smartlist_t *gen_ed_diff(const smartlist_t *cons1,
const smartlist_t *cons2,
struct memarea_t *area);
STATIC smartlist_t *apply_ed_diff(const smartlist_t *cons1,
const smartlist_t *diff,
int start_line);
STATIC void calc_changes(smartlist_slice_t *slice1, smartlist_slice_t *slice2,
bitarray_t *changed1, bitarray_t *changed2);
STATIC smartlist_slice_t *smartlist_slice(const smartlist_t *list,
int start, int end);
STATIC int next_router(const smartlist_t *cons, int cur);
STATIC int *lcs_lengths(const smartlist_slice_t *slice1,
const smartlist_slice_t *slice2,
int direction);
STATIC void trim_slices(smartlist_slice_t *slice1, smartlist_slice_t *slice2);
STATIC int base64cmp(const cdline_t *hash1, const cdline_t *hash2);
STATIC int get_id_hash(const cdline_t *line, cdline_t *hash_out);
STATIC int is_valid_router_entry(const cdline_t *line);
STATIC int smartlist_slice_string_pos(const smartlist_slice_t *slice,
const cdline_t *string);
STATIC void set_changed(bitarray_t *changed1, bitarray_t *changed2,
const smartlist_slice_t *slice1,
const smartlist_slice_t *slice2);
STATIC int consensus_split_lines(smartlist_t *out, const char *s,
struct memarea_t *area);
STATIC void smartlist_add_linecpy(smartlist_t *lst, struct memarea_t *area,
const char *s);
STATIC int lines_eq(const cdline_t *a, const cdline_t *b);
STATIC int line_str_eq(const cdline_t *a, const char *b);
MOCK_DECL(STATIC int,
consensus_compute_digest,(const char *cons,
consensus_digest_t *digest_out));
MOCK_DECL(STATIC int,
consensus_compute_digest_as_signed,(const char *cons,
consensus_digest_t *digest_out));
MOCK_DECL(STATIC int,
consensus_digest_eq,(const uint8_t *d1,
const uint8_t *d2));
#endif /* defined(CONSDIFF_PRIVATE) */
#endif /* !defined(TOR_CONSDIFF_H) */
|
