1 /* 2 * Copyright (c) 2013 Tatsuhiko Kubo <cubicdaiya@gmail.com> 3 * Copyright (c) 2018 Kristaps Dzonsons <kristaps@bsd.lv> 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 */ 25 #ifndef DIFF_H 26 #define DIFF_H 27 28 typedef int (*diff_cmp)(const void *, const void *); 29 30 enum difft { 31 DIFF_ADD, 32 DIFF_DELETE, 33 DIFF_COMMON 34 }; 35 36 struct diff_ses { 37 size_t originIdx; /* if >0, index+1 in origin array */ 38 size_t targetIdx; /* if >0, index+1 in target array */ 39 enum difft type; /* type of edit */ 40 const void *e; /* pointer to object */ 41 }; 42 43 struct diff { 44 const void **lcs; /* longest common subsequence */ 45 size_t lcssz; 46 struct diff_ses *ses; /* shortest edit script */ 47 size_t sessz; 48 size_t editdist; /* edit distance */ 49 }; 50 51 int diff(struct diff *, diff_cmp, size_t, 52 const void *, size_t, const void *, size_t); 53 54 #endif /* ! DIFF_H */ 55