1 files changed, 71 insertions, 0 deletions

diff --git a/contrib/diff/src/normal.c b/contrib/diff/src/normal.c
new file mode 100644
index 000000000000..4a015965444b
--- /dev/null
+++ b/contrib/diff/src/normal.c
@@ -0,0 +1,71 @@
+/* Normal-format output routines for GNU DIFF.
+
+   Copyright (C) 1988, 1989, 1993, 1995, 1998, 2001 Free Software
+   Foundation, Inc.
+
+   This file is part of GNU DIFF.
+
+   GNU DIFF is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   GNU DIFF is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING.
+   If not, write to the Free Software Foundation,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "diff.h"
+
+static void print_normal_hunk (struct change *);
+
+/* Print the edit-script SCRIPT as a normal diff.
+   INF points to an array of descriptions of the two files.  */
+
+void
+print_normal_script (struct change *script)
+{
+  print_script (script, find_change, print_normal_hunk);
+}
+
+/* Print a hunk of a normal diff.
+   This is a contiguous portion of a complete edit script,
+   describing changes in consecutive lines.  */
+
+static void
+print_normal_hunk (struct change *hunk)
+{
+  lin first0, last0, first1, last1;
+  register lin i;
+
+  /* Determine range of line numbers involved in each file.  */
+  enum changes changes = analyze_hunk (hunk, &first0, &last0, &first1, &last1);
+  if (!changes)
+    return;
+
+  begin_output ();
+
+  /* Print out the line number header for this hunk */
+  print_number_range (',', &files[0], first0, last0);
+  fprintf (outfile, "%c", change_letter[changes]);
+  print_number_range (',', &files[1], first1, last1);
+  fprintf (outfile, "\n");
+
+  /* Print the lines that the first file has.  */
+  if (changes & OLD)
+    for (i = first0; i <= last0; i++)
+      print_1_line ("<", &files[0].linbuf[i]);
+
+  if (changes == CHANGED)
+    fprintf (outfile, "---\n");
+
+  /* Print the lines that the second file has.  */
+  if (changes & NEW)
+    for (i = first1; i <= last1; i++)
+      print_1_line (">", &files[1].linbuf[i]);
+}