1/* Normal-format output routines for GNU DIFF.
2   Copyright (C) 1988, 1989, 1993, 1998 Free Software Foundation, Inc.
3
4This file is part of GNU DIFF.
5
6GNU DIFF is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2, or (at your option)
9any later version.
10
11GNU DIFF is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details.
15
16*/
17
18
19#include "diff.h"
20
21static void print_normal_hunk PARAMS((struct change *));
22
23/* Print the edit-script SCRIPT as a normal diff.
24   INF points to an array of descriptions of the two files.  */
25
26void
27print_normal_script (script)
28     struct change *script;
29{
30  print_script (script, find_change, print_normal_hunk);
31}
32
33/* Print a hunk of a normal diff.
34   This is a contiguous portion of a complete edit script,
35   describing changes in consecutive lines.  */
36
37static void
38print_normal_hunk (hunk)
39     struct change *hunk;
40{
41  int first0, last0, first1, last1, deletes, inserts;
42  register int i;
43
44  /* Determine range of line numbers involved in each file.  */
45  analyze_hunk (hunk, &first0, &last0, &first1, &last1, &deletes, &inserts);
46  if (!deletes && !inserts)
47    return;
48
49  begin_output ();
50
51  /* Print out the line number header for this hunk */
52  print_number_range (',', &files[0], first0, last0);
53  printf_output ("%c", change_letter (inserts, deletes));
54  print_number_range (',', &files[1], first1, last1);
55  printf_output ("\n");
56
57  /* Print the lines that the first file has.  */
58  if (deletes)
59    for (i = first0; i <= last0; i++)
60      print_1_line ("<", &files[0].linbuf[i]);
61
62  if (inserts && deletes)
63    printf_output ("---\n");
64
65  /* Print the lines that the second file has.  */
66  if (inserts)
67    for (i = first1; i <= last1; i++)
68      print_1_line (">", &files[1].linbuf[i]);
69}
70