Mercurial > vim

annotate src/xdiff/xhistogram.c @ 17506:74b6674b99fd v8.1.1751

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
patch 8.1.1751: when redrawing popups plines_win() may be called often commit https://github.com/vim/vim/commit/9d5ffceb3fea247a88d4d3936e97b7f488aab6ff Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jul 26 21:01:29 2019 +0200 patch 8.1.1751: when redrawing popups plines_win() may be called often Problem: When redrawing popups plines_win() may be called often. Solution: Pass a cache to mouse_comp_pos().
author Bram Moolenaar <Bram@vim.org>
date Fri, 26 Jul 2019 21:15:06 +0200
parents 195e8b1fcbbf
children 3be01cf0a632
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
14696
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
1 /*
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
2 * Copyright (C) 2010, Google Inc.
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
3 * and other copyright owners as documented in JGit's IP log.
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
4 *
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
5 * This program and the accompanying materials are made available
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
6 * under the terms of the Eclipse Distribution License v1.0 which
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
7 * accompanies this distribution, is reproduced below, and is
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
9 *
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
10 * All rights reserved.
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
11 *
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
12 * Redistribution and use in source and binary forms, with or
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
13 * without modification, are permitted provided that the following
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
14 * conditions are met:
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
15 *
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
16 * - Redistributions of source code must retain the above copyright
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
17 * notice, this list of conditions and the following disclaimer.
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
18 *
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
19 * - Redistributions in binary form must reproduce the above
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
20 * copyright notice, this list of conditions and the following
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
21 * disclaimer in the documentation and/or other materials provided
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
22 * with the distribution.
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
23 *
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
25 * names of its contributors may be used to endorse or promote
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
26 * products derived from this software without specific prior
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
27 * written permission.
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
28 *
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
42 */
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
43
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
44 #include "xinclude.h"
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
45 #include "xtypes.h"
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
46 #include "xdiff.h"
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
47
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
48 #define MAX_PTR INT_MAX
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
49 #define MAX_CNT INT_MAX
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
50
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
51 #define LINE_END(n) (line##n + count##n - 1)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
52 #define LINE_END_PTR(n) (*line##n + *count##n - 1)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
53
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
54 struct histindex {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
55 struct record {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
56 unsigned int ptr, cnt;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
57 struct record *next;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
58 } **records, /* an occurrence */
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
59 **line_map; /* map of line to record chain */
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
60 chastore_t rcha;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
61 unsigned int *next_ptrs;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
62 unsigned int table_bits,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
63 records_size,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
64 line_map_size;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
65
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
66 unsigned int max_chain_length,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
67 key_shift,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
68 ptr_shift;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
69
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
70 unsigned int cnt,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
71 has_common;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
72
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
73 xdfenv_t *env;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
74 xpparam_t const *xpp;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
75 };
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
76
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
77 struct region {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
78 unsigned int begin1, end1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
79 unsigned int begin2, end2;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
80 };
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
81
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
82 #define LINE_MAP(i, a) (i->line_map[(a) - i->ptr_shift])
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
83
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
84 #define NEXT_PTR(index, ptr) \
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
85 (index->next_ptrs[(ptr) - index->ptr_shift])
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
86
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
87 #define CNT(index, ptr) \
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
88 ((LINE_MAP(index, ptr))->cnt)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
89
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
90 #define REC(env, s, l) \
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
91 (env->xdf##s.recs[l - 1])
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
92
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
93 static int cmp_recs(xpparam_t const *xpp,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
94 xrecord_t *r1, xrecord_t *r2)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
95 {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
96 return r1->ha == r2->ha &&
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
97 xdl_recmatch(r1->ptr, r1->size, r2->ptr, r2->size,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
98 xpp->flags);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
99 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
100
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
101 #define CMP_ENV(xpp, env, s1, l1, s2, l2) \
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
102 (cmp_recs(xpp, REC(env, s1, l1), REC(env, s2, l2)))
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
103
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
104 #define CMP(i, s1, l1, s2, l2) \
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
105 (cmp_recs(i->xpp, REC(i->env, s1, l1), REC(i->env, s2, l2)))
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
106
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
107 #define TABLE_HASH(index, side, line) \
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
108 XDL_HASHLONG((REC(index->env, side, line))->ha, index->table_bits)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
109
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
110 static int scanA(struct histindex *index, int line1, int count1)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
111 {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
112 int ptr, tbl_idx;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
113 unsigned int chain_len;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
114 struct record **rec_chain, *rec;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
115
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
116 for (ptr = LINE_END(1); line1 <= ptr; ptr--) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
117 tbl_idx = TABLE_HASH(index, 1, ptr);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
118 rec_chain = index->records + tbl_idx;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
119 rec = *rec_chain;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
120
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
121 chain_len = 0;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
122 while (rec) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
123 if (CMP(index, 1, rec->ptr, 1, ptr)) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
124 /*
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
125 * ptr is identical to another element. Insert
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
126 * it onto the front of the existing element
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
127 * chain.
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
128 */
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
129 NEXT_PTR(index, ptr) = rec->ptr;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
130 rec->ptr = ptr;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
131 /* cap rec->cnt at MAX_CNT */
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
132 rec->cnt = XDL_MIN(MAX_CNT, rec->cnt + 1);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
133 LINE_MAP(index, ptr) = rec;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
134 goto continue_scan;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
135 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
136
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
137 rec = rec->next;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
138 chain_len++;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
139 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
140
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
141 if (chain_len == index->max_chain_length)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
142 return -1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
143
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
144 /*
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
145 * This is the first time we have ever seen this particular
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
146 * element in the sequence. Construct a new chain for it.
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
147 */
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
148 if (!(rec = xdl_cha_alloc(&index->rcha)))
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
149 return -1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
150 rec->ptr = ptr;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
151 rec->cnt = 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
152 rec->next = *rec_chain;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
153 *rec_chain = rec;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
154 LINE_MAP(index, ptr) = rec;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
155
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
156 continue_scan:
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
157 ; /* no op */
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
158 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
159
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
160 return 0;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
161 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
162
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
163 static int try_lcs(struct histindex *index, struct region *lcs, int b_ptr,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
164 int line1, int count1, int line2, int count2)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
165 {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
166 unsigned int b_next = b_ptr + 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
167 struct record *rec = index->records[TABLE_HASH(index, 2, b_ptr)];
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
168 unsigned int as, ae, bs, be, np, rc;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
169 int should_break;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
170
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
171 for (; rec; rec = rec->next) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
172 if (rec->cnt > index->cnt) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
173 if (!index->has_common)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
174 index->has_common = CMP(index, 1, rec->ptr, 2, b_ptr);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
175 continue;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
176 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
177
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
178 as = rec->ptr;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
179 if (!CMP(index, 1, as, 2, b_ptr))
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
180 continue;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
181
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
182 index->has_common = 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
183 for (;;) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
184 should_break = 0;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
185 np = NEXT_PTR(index, as);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
186 bs = b_ptr;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
187 ae = as;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
188 be = bs;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
189 rc = rec->cnt;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
190
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
191 while (line1 < (int)as && line2 < (int)bs
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
192 && CMP(index, 1, as - 1, 2, bs - 1)) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
193 as--;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
194 bs--;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
195 if (1 < rc)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
196 rc = XDL_MIN(rc, CNT(index, as));
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
197 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
198 while ((int)ae < LINE_END(1) && (int)be < LINE_END(2)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
199 && CMP(index, 1, ae + 1, 2, be + 1)) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
200 ae++;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
201 be++;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
202 if (1 < rc)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
203 rc = XDL_MIN(rc, CNT(index, ae));
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
204 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
205
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
206 if (b_next <= be)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
207 b_next = be + 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
208 if (lcs->end1 - lcs->begin1 < ae - as || rc < index->cnt) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
209 lcs->begin1 = as;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
210 lcs->begin2 = bs;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
211 lcs->end1 = ae;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
212 lcs->end2 = be;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
213 index->cnt = rc;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
214 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
215
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
216 if (np == 0)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
217 break;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
218
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
219 while (np <= ae) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
220 np = NEXT_PTR(index, np);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
221 if (np == 0) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
222 should_break = 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
223 break;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
224 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
225 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
226
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
227 if (should_break)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
228 break;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
229
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
230 as = np;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
231 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
232 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
233 return b_next;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
234 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
235
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
236 static int fall_back_to_classic_diff(xpparam_t const *xpp, xdfenv_t *env,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
237 int line1, int count1, int line2, int count2)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
238 {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
239 xpparam_t xpparam;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
240 xpparam.flags = xpp->flags & ~XDF_DIFF_ALGORITHM_MASK;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
241
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
242 return xdl_fall_back_diff(env, &xpparam,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
243 line1, count1, line2, count2);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
244 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
245
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
246 static inline void free_index(struct histindex *index)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
247 {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
248 xdl_free(index->records);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
249 xdl_free(index->line_map);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
250 xdl_free(index->next_ptrs);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
251 xdl_cha_free(&index->rcha);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
252 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
253
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
254 static int find_lcs(xpparam_t const *xpp, xdfenv_t *env,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
255 struct region *lcs,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
256 int line1, int count1, int line2, int count2)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
257 {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
258 int b_ptr;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
259 int sz, ret = -1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
260 struct histindex index;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
261
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
262 memset(&index, 0, sizeof(index));
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
263
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
264 index.env = env;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
265 index.xpp = xpp;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
266
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
267 index.records = NULL;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
268 index.line_map = NULL;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
269 /* in case of early xdl_cha_free() */
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
270 index.rcha.head = NULL;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
271
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
272 index.table_bits = xdl_hashbits(count1);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
273 sz = index.records_size = 1 << index.table_bits;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
274 sz *= sizeof(struct record *);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
275 if (!(index.records = (struct record **) xdl_malloc(sz)))
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
276 goto cleanup;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
277 memset(index.records, 0, sz);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
278
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
279 sz = index.line_map_size = count1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
280 sz *= sizeof(struct record *);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
281 if (!(index.line_map = (struct record **) xdl_malloc(sz)))
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
282 goto cleanup;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
283 memset(index.line_map, 0, sz);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
284
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
285 sz = index.line_map_size;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
286 sz *= sizeof(unsigned int);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
287 if (!(index.next_ptrs = (unsigned int *) xdl_malloc(sz)))
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
288 goto cleanup;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
289 memset(index.next_ptrs, 0, sz);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
290
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
291 /* lines / 4 + 1 comes from xprepare.c:xdl_prepare_ctx() */
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
292 if (xdl_cha_init(&index.rcha, sizeof(struct record), count1 / 4 + 1) < 0)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
293 goto cleanup;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
294
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
295 index.ptr_shift = line1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
296 index.max_chain_length = 64;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
297
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
298 if (scanA(&index, line1, count1))
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
299 goto cleanup;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
300
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
301 index.cnt = index.max_chain_length + 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
302
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
303 for (b_ptr = line2; b_ptr <= LINE_END(2); )
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
304 b_ptr = try_lcs(&index, lcs, b_ptr, line1, count1, line2, count2);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
305
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
306 if (index.has_common && index.max_chain_length < index.cnt)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
307 ret = 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
308 else
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
309 ret = 0;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
310
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
311 cleanup:
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
312 free_index(&index);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
313 return ret;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
314 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
315
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
316 static int histogram_diff(xpparam_t const *xpp, xdfenv_t *env,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
317 int line1, int count1, int line2, int count2)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
318 {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
319 struct region lcs;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
320 int lcs_found;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
321 int result;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
322 redo:
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
323 result = -1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
324
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
325 if (count1 <= 0 && count2 <= 0)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
326 return 0;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
327
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
328 if (LINE_END(1) >= MAX_PTR)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
329 return -1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
330
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
331 if (!count1) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
332 while(count2--)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
333 env->xdf2.rchg[line2++ - 1] = 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
334 return 0;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
335 } else if (!count2) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
336 while(count1--)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
337 env->xdf1.rchg[line1++ - 1] = 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
338 return 0;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
339 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
340
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
341 memset(&lcs, 0, sizeof(lcs));
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
342 lcs_found = find_lcs(xpp, env, &lcs, line1, count1, line2, count2);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
343 if (lcs_found < 0)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
344 goto out;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
345 else if (lcs_found)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
346 result = fall_back_to_classic_diff(xpp, env, line1, count1, line2, count2);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
347 else {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
348 if (lcs.begin1 == 0 && lcs.begin2 == 0) {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
349 while (count1--)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
350 env->xdf1.rchg[line1++ - 1] = 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
351 while (count2--)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
352 env->xdf2.rchg[line2++ - 1] = 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
353 result = 0;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
354 } else {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
355 result = histogram_diff(xpp, env,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
356 line1, lcs.begin1 - line1,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
357 line2, lcs.begin2 - line2);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
358 if (result)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
359 goto out;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
360 /*
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
361 * result = histogram_diff(xpp, env,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
362 * lcs.end1 + 1, LINE_END(1) - lcs.end1,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
363 * lcs.end2 + 1, LINE_END(2) - lcs.end2);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
364 * but let's optimize tail recursion ourself:
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
365 */
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
366 count1 = LINE_END(1) - lcs.end1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
367 line1 = lcs.end1 + 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
368 count2 = LINE_END(2) - lcs.end2;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
369 line2 = lcs.end2 + 1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
370 goto redo;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
371 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
372 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
373 out:
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
374 return result;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
375 }
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
376
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
377 int xdl_do_histogram_diff(mmfile_t *file1, mmfile_t *file2,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
378 xpparam_t const *xpp, xdfenv_t *env)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
379 {
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
380 if (xdl_prepare_env(file1, file2, xpp, env) < 0)
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
381 return -1;
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
382
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
383 return histogram_diff(xpp, env,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
384 env->xdf1.dstart + 1, env->xdf1.dend - env->xdf1.dstart + 1,
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
385 env->xdf2.dstart + 1, env->xdf2.dend - env->xdf2.dstart + 1);
195e8b1fcbbf patch 8.1.0360: using an external diff program is slow and inflexible
Christian Brabandt <cb@256bit.org>
parents:
diff changeset
386 }