1 /* Normal-format output routines for GNU DIFF.
2 Copyright (C) 1988, 1989, 1993 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 static void print_normal_hunk PARAMS((struct change *));
24
25 /* Print the edit-script SCRIPT as a normal diff.
26 INF points to an array of descriptions of the two files. */
27
28 void
print_normal_script(script)29 print_normal_script (script)
30 struct change *script;
31 {
32 print_script (script, find_change, print_normal_hunk);
33 }
34
35 /* Print a hunk of a normal diff.
36 This is a contiguous portion of a complete edit script,
37 describing changes in consecutive lines. */
38
39 static void
print_normal_hunk(hunk)40 print_normal_hunk (hunk)
41 struct change *hunk;
42 {
43 int first0, last0, first1, last1, deletes, inserts;
44 register int i;
45
46 /* Determine range of line numbers involved in each file. */
47 analyze_hunk (hunk, &first0, &last0, &first1, &last1, &deletes, &inserts);
48 if (!deletes && !inserts)
49 return;
50
51 begin_output ();
52
53 /* Print out the line number header for this hunk */
54 print_number_range (',', &files[0], first0, last0);
55 fprintf (outfile, "%c", change_letter (inserts, deletes));
56 print_number_range (',', &files[1], first1, last1);
57 fprintf (outfile, "\n");
58
59 /* Print the lines that the first file has. */
60 if (deletes)
61 for (i = first0; i <= last0; i++)
62 print_1_line ("<", &files[0].linbuf[i]);
63
64 if (inserts && deletes)
65 fprintf (outfile, "---\n");
66
67 /* Print the lines that the second file has. */
68 if (inserts)
69 for (i = first1; i <= last1; i++)
70 print_1_line (">", &files[1].linbuf[i]);
71 }
72