1 /* Common parts for printing diff output */
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.
24 #include <diff/arraylist.h>
25 #include <diff/diff_main.h>
26 #include <diff/diff_output.h>
29 get_atom_byte(struct diff_atom *atom, off_t off)
37 cur = lseek(atom->d->root->fd, 0, SEEK_CUR);
39 abort(); /* XXX cannot return error */
41 if (cur != atom->pos + off &&
42 lseek(atom->d->root->fd, atom->pos + off, SEEK_SET) == -1)
43 abort(); /* XXX cannot return error */
45 if (read(atom->d->root->fd, &ch, sizeof(ch)) == -1)
46 abort(); /* XXX cannot return error */
52 diff_output_lines(FILE *dest, const char *prefix, struct diff_atom *start_atom,
55 struct diff_atom *atom;
56 foreach_diff_atom(atom, start_atom, count) {
57 fprintf(dest, "%s", prefix);
59 unsigned int len = atom->len;
62 ch = get_atom_byte(atom, len - 1);
66 ch = get_atom_byte(atom, len - 1);
72 for (i = 0; i < len; i++) {
73 char c = get_atom_byte(atom, i);
74 if ((c < 0x20 || c >= 0x7f) && c != '\t')
75 fprintf(dest, "\\x%02x", (unsigned char)c);
77 fprintf(dest, "%c", c);