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/* Copyright (c) 2014, Daniel Martí
* Copyright (c) 2014, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#ifndef TOR_CONSDIFF_H
#define TOR_CONSDIFF_H
#include "or.h"
typedef struct consensus_digest_t {
uint8_t sha3_256[DIGEST256_LEN];
} consensus_digest_t;
smartlist_t *consdiff_gen_diff(smartlist_t *cons1, smartlist_t *cons2,
consensus_digest_t *digests1, consensus_digest_t *digests2);
char *consdiff_apply_diff(smartlist_t *cons1, smartlist_t *diff,
consensus_digest_t *digests1);
int consdiff_get_digests(smartlist_t *diff,
char *digest1_out,
char *digest2_out);
#ifdef CONSDIFF_PRIVATE
/** 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.
* */
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(smartlist_t *cons1, smartlist_t *cons2);
STATIC smartlist_t *apply_ed_diff(smartlist_t *cons1, smartlist_t *diff);
STATIC void calc_changes(smartlist_slice_t *slice1, smartlist_slice_t *slice2,
bitarray_t *changed1, bitarray_t *changed2);
STATIC smartlist_slice_t *smartlist_slice(smartlist_t *list,
int start, int end);
STATIC int next_router(smartlist_t *cons, int cur);
STATIC int *lcs_lengths(smartlist_slice_t *slice1, smartlist_slice_t *slice2,
int direction);
STATIC void trim_slices(smartlist_slice_t *slice1, smartlist_slice_t *slice2);
STATIC int base64cmp(const char *hash1, const char *hash2);
STATIC const char *get_id_hash(const char *r_line);
STATIC int is_valid_router_entry(const char *line);
STATIC int smartlist_slice_string_pos(smartlist_slice_t *slice,
const char *string);
STATIC void set_changed(bitarray_t *changed1, bitarray_t *changed2,
smartlist_slice_t *slice1, smartlist_slice_t *slice2);
STATIC int consensus_compute_digest(const char *cons,
consensus_digest_t *digest_out);
#endif
#endif
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