1 /* Common parts for printing diff output */
2 /*
3  * Copyright (c) 2020 Neels Hofmeyr <neels@hofmeyr.de>
4  *
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.
8  *
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.
16  */
17 
18 #include <diff/diff_output.h>
19 
20 void diff_output_lines(FILE *dest, const char *prefix, struct diff_atom *start_atom, unsigned int count)
21 {
22 	struct diff_atom *atom;
23 	foreach_diff_atom(atom, start_atom, count) {
24 		fprintf(dest, "%s", prefix);
25 		int i;
26 		unsigned int len = atom->len;
27 		if (len && atom->at[len - 1] == '\n') {
28 			len--;
29 			if (len && atom->at[len - 1] == '\r')
30 				len--;
31 		}
32 
33 		for (i = 0; i < len; i++) {
34 			char c = atom->at[i];
35 			if ((c < 0x20 || c >= 0x7f) && c != '\t')
36 				fprintf(dest, "\\x%02x", (unsigned char)c);
37 			else
38 				fprintf(dest, "%c", c);
39 		}
40 		fprintf(dest, "\n");
41 	}
42 }
43 
44 enum diff_rc diff_output_info(FILE *dest, const struct diff_input_info *info)
45 {
46 	if (info->arbitrary_info && *info->arbitrary_info)
47 		fprintf(dest, "%s", info->arbitrary_info);
48 	fprintf(dest, "--- %s\n+++ %s\n",
49 		info->left_path ? : "a",
50 		info->right_path ? : "b");
51         return DIFF_RC_OK;
52 }