normal.c revision 1.1.1.1 
1/*	$NetBSD: normal.c,v 1.1.1.1 2016/01/13 03:15:30 christos Exp $	*/
2
3/* Normal-format output routines for GNU DIFF.
4
5   Copyright (C) 1988, 1989, 1993, 1995, 1998, 2001 Free Software
6   Foundation, Inc.
7
8   This file is part of GNU DIFF.
9
10   GNU DIFF is free software; you can redistribute it and/or modify
11   it under the terms of the GNU General Public License as published by
12   the Free Software Foundation; either version 2, or (at your option)
13   any later version.
14
15   GNU DIFF is distributed in the hope that it will be useful,
16   but WITHOUT ANY WARRANTY; without even the implied warranty of
17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18   GNU General Public License for more details.
19
20   You should have received a copy of the GNU General Public License
21   along with this program; see the file COPYING.
22   If not, write to the Free Software Foundation,
23   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
24
25#include "diff.h"
26
27static void print_normal_hunk (struct change *);
28
29/* Print the edit-script SCRIPT as a normal diff.
30   INF points to an array of descriptions of the two files.  */
31
32void
33print_normal_script (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
42static void
43print_normal_hunk (struct change *hunk)
44{
45  lin first0, last0, first1, last1;
46  register lin i;
47
48  /* Determine range of line numbers involved in each file.  */
49  enum changes changes = analyze_hunk (hunk, &first0, &last0, &first1, &last1);
50  if (!changes)
51    return;
52
53  begin_output ();
54
55  /* Print out the line number header for this hunk */
56  print_number_range (',', &files[0], first0, last0);
57  fprintf (outfile, "%c", change_letter[changes]);
58  print_number_range (',', &files[1], first1, last1);
59  fprintf (outfile, "\n");
60
61  /* Print the lines that the first file has.  */
62  if (changes & OLD)
63    for (i = first0; i <= last0; i++)
64      print_1_line ("<", &files[0].linbuf[i]);
65
66  if (changes == CHANGED)
67    fprintf (outfile, "---\n");
68
69  /* Print the lines that the second file has.  */
70  if (changes & NEW)
71    for (i = first1; i <= last1; i++)
72      print_1_line (">", &files[1].linbuf[i]);
73}
74