xdiff: factor out get_func_line()
[git/git.git] / xdiff / xdiff.h
1 /*
2 * LibXDiff by Davide Libenzi ( File Differential Library )
3 * Copyright (C) 2003 Davide Libenzi
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 * Davide Libenzi <davidel@xmailserver.org>
20 *
21 */
22
23 #if !defined(XDIFF_H)
24 #define XDIFF_H
25
26 #ifdef __cplusplus
27 extern "C" {
28 #endif /* #ifdef __cplusplus */
29
30
31 #define XDF_NEED_MINIMAL (1 << 1)
32 #define XDF_IGNORE_WHITESPACE (1 << 2)
33 #define XDF_IGNORE_WHITESPACE_CHANGE (1 << 3)
34 #define XDF_IGNORE_WHITESPACE_AT_EOL (1 << 4)
35 #define XDF_PATIENCE_DIFF (1 << 5)
36 #define XDF_HISTOGRAM_DIFF (1 << 6)
37 #define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE | XDF_IGNORE_WHITESPACE_AT_EOL)
38
39 #define XDL_PATCH_NORMAL '-'
40 #define XDL_PATCH_REVERSE '+'
41 #define XDL_PATCH_MODEMASK ((1 << 8) - 1)
42 #define XDL_PATCH_IGNOREBSPACE (1 << 8)
43
44 #define XDL_EMIT_FUNCNAMES (1 << 0)
45 #define XDL_EMIT_COMMON (1 << 1)
46
47 #define XDL_MMB_READONLY (1 << 0)
48
49 #define XDL_MMF_ATOMIC (1 << 0)
50
51 #define XDL_BDOP_INS 1
52 #define XDL_BDOP_CPY 2
53 #define XDL_BDOP_INSB 3
54
55 /* merge simplification levels */
56 #define XDL_MERGE_MINIMAL 0
57 #define XDL_MERGE_EAGER 1
58 #define XDL_MERGE_ZEALOUS 2
59 #define XDL_MERGE_ZEALOUS_ALNUM 3
60
61 /* merge favor modes */
62 #define XDL_MERGE_FAVOR_OURS 1
63 #define XDL_MERGE_FAVOR_THEIRS 2
64 #define XDL_MERGE_FAVOR_UNION 3
65
66 /* merge output styles */
67 #define XDL_MERGE_DIFF3 1
68
69 typedef struct s_mmfile {
70 char *ptr;
71 long size;
72 } mmfile_t;
73
74 typedef struct s_mmbuffer {
75 char *ptr;
76 long size;
77 } mmbuffer_t;
78
79 typedef struct s_xpparam {
80 unsigned long flags;
81 } xpparam_t;
82
83 typedef struct s_xdemitcb {
84 void *priv;
85 int (*outf)(void *, mmbuffer_t *, int);
86 } xdemitcb_t;
87
88 typedef long (*find_func_t)(const char *line, long line_len, char *buffer, long buffer_size, void *priv);
89
90 typedef struct s_xdemitconf {
91 long ctxlen;
92 long interhunkctxlen;
93 unsigned long flags;
94 find_func_t find_func;
95 void *find_func_priv;
96 void (*emit_func)();
97 } xdemitconf_t;
98
99 typedef struct s_bdiffparam {
100 long bsize;
101 } bdiffparam_t;
102
103
104 #define xdl_malloc(x) malloc(x)
105 #define xdl_free(ptr) free(ptr)
106 #define xdl_realloc(ptr,x) realloc(ptr,x)
107
108 void *xdl_mmfile_first(mmfile_t *mmf, long *size);
109 long xdl_mmfile_size(mmfile_t *mmf);
110
111 int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
112 xdemitconf_t const *xecfg, xdemitcb_t *ecb);
113
114 typedef struct s_xmparam {
115 xpparam_t xpp;
116 int marker_size;
117 int level;
118 int favor;
119 int style;
120 const char *ancestor; /* label for orig */
121 const char *file1; /* label for mf1 */
122 const char *file2; /* label for mf2 */
123 } xmparam_t;
124
125 #define DEFAULT_CONFLICT_MARKER_SIZE 7
126
127 int xdl_merge(mmfile_t *orig, mmfile_t *mf1, mmfile_t *mf2,
128 xmparam_t const *xmp, mmbuffer_t *result);
129
130 #ifdef __cplusplus
131 }
132 #endif /* #ifdef __cplusplus */
133
134 #endif /* #if !defined(XDIFF_H) */