1/* Normal-format output routines for GNU DIFF.
2
3   Copyright (C) 1988, 1989, 1993, 1995, 1998, 2001 Free Software
4   Foundation, Inc.
5
6   This file is part of GNU DIFF.
7
8   GNU DIFF is free software; you can redistribute it and/or modify
9   it under the terms of the GNU General Public License as published by
10   the Free Software Foundation; either version 2, or (at your option)
11   any later version.
12
13   GNU DIFF is distributed in the hope that it will be useful,
14   but WITHOUT ANY WARRANTY; without even the implied warranty of
15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16   GNU General Public License for more details.
17
18   You should have received a copy of the GNU General Public License
19   along with this program; see the file COPYING.
20   If not, write to the Free Software Foundation,
21   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
22
23#include "diff.h"
24
25static void print_normal_hunk (struct change *);
26
27/* Print the edit-script SCRIPT as a normal diff.
28   INF points to an array of descriptions of the two files.  */
29
30void
31print_normal_script (struct change *script)
32{
33  print_script (script, find_change, print_normal_hunk);
34}
35
36/* Print a hunk of a normal diff.
37   This is a contiguous portion of a complete edit script,
38   describing changes in consecutive lines.  */
39
40static void
41print_normal_hunk (struct change *hunk)
42{
43  lin first0, last0, first1, last1;
44  register lin i;
45
46  /* Determine range of line numbers involved in each file.  */
47  enum changes changes = analyze_hunk (hunk, &first0, &last0, &first1, &last1);
48  if (!changes)
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[changes]);
56  print_number_range (',', &files[1], first1, last1);
57  fprintf (outfile, "\n");
58
59  /* Print the lines that the first file has.  */
60  if (changes & OLD)
61    for (i = first0; i <= last0; i++)
62      print_1_line ("<", &files[0].linbuf[i]);
63
64  if (changes == CHANGED)
65    fprintf (outfile, "---\n");
66
67  /* Print the lines that the second file has.  */
68  if (changes & NEW)
69    for (i = first1; i <= last1; i++)
70      print_1_line (">", &files[1].linbuf[i]);
71}
72