1 /* Diff output generators and invocation shims. */
3 * Copyright (c) 2020 Neels Hofmeyr <neels@hofmeyr.de>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 struct diff_input_info
{
19 const char *left_path
;
20 const char *right_path
;
22 /* Set by caller of diff_output_* functions. */
24 #define DIFF_INPUT_LEFT_NONEXISTENT 0x00000001
25 #define DIFF_INPUT_RIGHT_NONEXISTENT 0x00000002
28 struct diff_output_info
{
30 * Byte offset to each line in the generated output file.
31 * The total number of lines in the file is line_offsets.len - 1.
32 * The last offset in this array corresponds to end-of-file.
34 ARRAYLIST(off_t
) line_offsets
;
37 void diff_output_info_free(struct diff_output_info
*output_info
);
39 struct diff_chunk_context
{
40 struct diff_range chunk
;
41 struct diff_range left
, right
;
44 int diff_output_plain(struct diff_output_info
**output_info
, FILE *dest
,
45 const struct diff_input_info
*info
,
46 const struct diff_result
*result
);
47 int diff_output_unidiff(struct diff_output_info
**output_info
,
48 FILE *dest
, const struct diff_input_info
*info
,
49 const struct diff_result
*result
,
50 unsigned int context_lines
);
51 int diff_output_edscript(struct diff_output_info
**output_info
,
52 FILE *dest
, const struct diff_input_info
*info
,
53 const struct diff_result
*result
);
54 int diff_chunk_get_left_start(const struct diff_chunk
*c
,
55 const struct diff_result
*r
,
57 int diff_chunk_get_left_end(const struct diff_chunk
*c
,
58 const struct diff_result
*r
,
60 int diff_chunk_get_right_start(const struct diff_chunk
*c
,
61 const struct diff_result
*r
,
63 int diff_chunk_get_right_end(const struct diff_chunk
*c
,
64 const struct diff_result
*r
,
66 struct diff_chunk
*diff_chunk_get(const struct diff_result
*r
, int chunk_idx
);
67 int diff_chunk_get_left_count(struct diff_chunk
*c
);
68 int diff_chunk_get_right_count(struct diff_chunk
*c
);
69 void diff_chunk_context_get(struct diff_chunk_context
*cc
,
70 const struct diff_result
*r
,
71 int chunk_idx
, int context_lines
);
72 void diff_chunk_context_load_change(struct diff_chunk_context
*cc
,
74 struct diff_result
*result
,
78 struct diff_output_unidiff_state
;
79 struct diff_output_unidiff_state
*diff_output_unidiff_state_alloc(void);
80 void diff_output_unidiff_state_reset(struct diff_output_unidiff_state
*state
);
81 void diff_output_unidiff_state_free(struct diff_output_unidiff_state
*state
);
82 int diff_output_unidiff_chunk(struct diff_output_info
**output_info
, FILE *dest
,
83 struct diff_output_unidiff_state
*state
,
84 const struct diff_input_info
*info
,
85 const struct diff_result
*result
,
86 const struct diff_chunk_context
*cc
);
87 int diff_output_chunk_left_version(struct diff_output_info
**output_info
,
89 const struct diff_input_info
*info
,
90 const struct diff_result
*result
,
91 const struct diff_chunk_context
*cc
);
92 int diff_output_chunk_right_version(struct diff_output_info
**output_info
,
94 const struct diff_input_info
*info
,
95 const struct diff_result
*result
,
96 const struct diff_chunk_context
*cc
);
98 const char *diff_output_get_label_left(const struct diff_input_info
*info
);
99 const char *diff_output_get_label_right(const struct diff_input_info
*info
);