1 /* Normal-format output routines for GNU DIFF.
2 Copyright (C) 1988, 1989 Free Software Foundation, Inc.
3
4 This file is part of GNU DIFF.
5
6 GNU DIFF is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU DIFF is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU DIFF; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20
21 #include "diff.h"
22
23 int change_letter ();
24 void print_normal_hunk ();
25 void print_number_range ();
26 struct change *find_change ();
27
28 /* Print the edit-script SCRIPT as a normal diff.
29 INF points to an array of descriptions of the two files. */
30
31 void
print_normal_script(script)32 print_normal_script (script)
33 struct change *script;
34 {
35 print_script (script, find_change, print_normal_hunk);
36 }
37
38 /* Print a hunk of a normal diff.
39 This is a contiguous portion of a complete edit script,
40 describing changes in consecutive lines. */
41
42 void
print_normal_hunk(hunk)43 print_normal_hunk (hunk)
44 struct change *hunk;
45 {
46 int first0, last0, first1, last1, deletes, inserts;
47 register int i;
48
49 /* Determine range of line numbers involved in each file. */
50 analyze_hunk (hunk, &first0, &last0, &first1, &last1, &deletes, &inserts);
51 if (!deletes && !inserts)
52 return;
53
54 begin_output ();
55
56 /* Print out the line number header for this hunk */
57 print_number_range (',', &files[0], first0, last0);
58 fprintf (outfile, "%c", change_letter (inserts, deletes));
59 print_number_range (',', &files[1], first1, last1);
60 fprintf (outfile, "\n");
61
62 /* Print the lines that the first file has. */
63 if (deletes)
64 for (i = first0; i <= last0; i++)
65 print_1_line ("<", &files[0].linbuf[i]);
66
67 if (inserts && deletes)
68 fprintf (outfile, "---\n");
69
70 /* Print the lines that the second file has. */
71 if (inserts)
72 for (i = first1; i <= last1; i++)
73 print_1_line (">", &files[1].linbuf[i]);
74 }
75