libdiff.h (1878B)
/*
* Copyright (c) 2013 Tatsuhiko Kubo <cubicdaiya@gmail.com>
* Copyright (c) 2018 Kristaps Dzonsons <kristaps@bsd.lv>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef DIFF_H
#define DIFF_H
typedef int (*diff_cmp)(const void *, const void *);
enum difft {
DIFF_ADD,
DIFF_DELETE,
DIFF_COMMON
};
struct diff_ses {
size_t originIdx; /* if >0, index+1 in origin array */
size_t targetIdx; /* if >0, index+1 in target array */
enum difft type; /* type of edit */
const void *e; /* pointer to object */
};
struct diff {
const void **lcs; /* longest common subsequence */
size_t lcssz;
struct diff_ses *ses; /* shortest edit script */
size_t sessz;
size_t editdist; /* edit distance */
};
int diff(struct diff *, diff_cmp, size_t,
const void *, size_t, const void *, size_t);
#endif /* ! DIFF_H */