Remove files that were taken off vendor branch. Difference

against vendor branch is now maintained in patchsets.

6 files changed, 0 insertions, 3438 deletions

diff --git a/contrib/diff/diff.c b/contrib/diff/diff.c
deleted file mode 100644
index 1f5f842d2e93..000000000000
--- a/contrib/diff/diff.c
+++ /dev/null
@@ -1,1121 +0,0 @@
-/* GNU DIFF main routine.
-   Copyright (C) 1988, 1989, 1992, 1993, 1994 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 GNU DIFF; see the file COPYING.  If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
-
-/* GNU DIFF was written by Mike Haertel, David Hayes,
-   Richard Stallman, Len Tower, and Paul Eggert.  */
-
-/* $FreeBSD$ */
-
-#define GDIFF_MAIN
-#include "diff.h"
-#include <signal.h>
-#include "getopt.h"
-#ifdef __FreeBSD__
-#include <locale.h>
-#include <fnmatch.h>
-#else
-#include "fnmatch.h"
-#endif
-#include "prepend_args.h"
-
-#ifndef DEFAULT_WIDTH
-#define DEFAULT_WIDTH 130
-#endif
-
-#ifndef GUTTER_WIDTH_MINIMUM
-#define GUTTER_WIDTH_MINIMUM 3
-#endif
-
-static char const *filetype PARAMS((struct stat const *));
-static char *option_list PARAMS((char **, int));
-static int add_exclude_file PARAMS((char const *));
-static int ck_atoi PARAMS((char const *, int *));
-static int compare_files PARAMS((char const *, char const *, char const *, char const *, int));
-static int specify_format PARAMS((char **, char *));
-static void add_exclude PARAMS((char const *));
-static void add_regexp PARAMS((struct regexp_list **, char const *));
-static void specify_style PARAMS((enum output_style));
-static void try_help PARAMS((char const *));
-static void check_stdout PARAMS((void));
-static void usage PARAMS((void));
-
-/* Nonzero for -r: if comparing two directories,
-   compare their common subdirectories recursively.  */
-
-static int recursive;
-
-/* For debugging: don't do discard_confusing_lines.  */
-
-int no_discards;
-
-#if HAVE_SETMODE
-/* I/O mode: nonzero only if using binary input/output.  */
-static int binary_I_O;
-#endif
-
-/* Return a string containing the command options with which diff was invoked.
-   Spaces appear between what were separate ARGV-elements.
-   There is a space at the beginning but none at the end.
-   If there were no options, the result is an empty string.
-
-   Arguments: OPTIONVEC, a vector containing separate ARGV-elements, and COUNT,
-   the length of that vector.  */
-
-static char *
-option_list (optionvec, count)
-     char **optionvec;  /* Was `vector', but that collides on Alliant.  */
-     int count;
-{
-  int i;
-  size_t length = 0;
-  char *result;
-
-  for (i = 0; i < count; i++)
-    length += strlen (optionvec[i]) + 1;
-
-  result = xmalloc (length + 1);
-  result[0] = 0;
-
-  for (i = 0; i < count; i++)
-    {
-      strcat (result, " ");
-      strcat (result, optionvec[i]);
-    }
-
-  return result;
-}
-
-/* Convert STR to a positive integer, storing the result in *OUT.
-   If STR is not a valid integer, return -1 (otherwise 0). */
-static int
-ck_atoi (str, out)
-     char const *str;
-     int *out;
-{
-  char const *p;
-  for (p = str; *p; p++)
-    if (*p < '0' || *p > '9')
-      return -1;
-
-  *out = atoi (optarg);
-  return 0;
-}
-
-/* Keep track of excluded file name patterns.  */
-
-static char const **exclude;
-static int exclude_alloc, exclude_count;
-
-int
-excluded_filename (f)
-     char const *f;
-{
-  int i;
-  for (i = 0;  i < exclude_count;  i++)
-    if (fnmatch (exclude[i], f, 0) == 0)
-      return 1;
-  return 0;
-}
-
-static void
-add_exclude (pattern)
-     char const *pattern;
-{
-  if (exclude_alloc <= exclude_count)
-    exclude = (char const **)
-	      (exclude_alloc == 0
-	       ? xmalloc ((exclude_alloc = 64) * sizeof (*exclude))
-	       : xrealloc (exclude, (exclude_alloc *= 2) * sizeof (*exclude)));
-
-  exclude[exclude_count++] = pattern;
-}
-
-static int
-add_exclude_file (name)
-     char const *name;
-{
-  struct file_data f;
-  char *p, *q, *lim;
-
-  f.name = optarg;
-  f.desc = (strcmp (optarg, "-") == 0
-	    ? STDIN_FILENO
-	    : open (optarg, O_RDONLY, 0));
-  if (f.desc < 0 || fstat (f.desc, &f.stat) != 0)
-    return -1;
-
-  sip (&f, 1);
-  slurp (&f);
-
-  for (p = f.buffer, lim = p + f.buffered_chars;  p < lim;  p = q)
-    {
-      q = (char *) memchr (p, '\n', lim - p);
-      if (!q)
-	q = lim;
-      *q++ = 0;
-      add_exclude (p);
-    }
-
-  return close (f.desc);
-}
-
-/* The numbers 129- that appear in the fourth element of some entries
-   tell the big switch in `main' how to process those options.  */
-
-static struct option const longopts[] =
-{
-  {"ignore-blank-lines", 0, 0, 'B'},
-  {"context", 2, 0, 'C'},
-  {"ifdef", 1, 0, 'D'},
-  {"show-function-line", 1, 0, 'F'},
-  {"speed-large-files", 0, 0, 'H'},
-  {"ignore-matching-lines", 1, 0, 'I'},
-  {"label", 1, 0, 'L'},
-  {"file-label", 1, 0, 'L'},	/* An alias, no longer recommended */
-  {"new-file", 0, 0, 'N'},
-  {"entire-new-file", 0, 0, 'N'},	/* An alias, no longer recommended */
-  {"unidirectional-new-file", 0, 0, 'P'},
-  {"starting-file", 1, 0, 'S'},
-  {"initial-tab", 0, 0, 'T'},
-  {"width", 1, 0, 'W'},
-  {"text", 0, 0, 'a'},
-  {"ascii", 0, 0, 'a'},		/* An alias, no longer recommended */
-  {"ignore-space-change", 0, 0, 'b'},
-  {"minimal", 0, 0, 'd'},
-  {"ed", 0, 0, 'e'},
-  {"forward-ed", 0, 0, 'f'},
-  {"ignore-case", 0, 0, 'i'},
-  {"paginate", 0, 0, 'l'},
-  {"print", 0, 0, 'l'},		/* An alias, no longer recommended */
-  {"rcs", 0, 0, 'n'},
-  {"show-c-function", 0, 0, 'p'},
-  {"brief", 0, 0, 'q'},
-  {"recursive", 0, 0, 'r'},
-  {"report-identical-files", 0, 0, 's'},
-  {"expand-tabs", 0, 0, 't'},
-  {"version", 0, 0, 'v'},
-  {"ignore-all-space", 0, 0, 'w'},
-  {"exclude", 1, 0, 'x'},
-  {"exclude-from", 1, 0, 'X'},
-  {"side-by-side", 0, 0, 'y'},
-  {"unified", 2, 0, 'U'},
-  {"left-column", 0, 0, 129},
-  {"suppress-common-lines", 0, 0, 130},
-  {"sdiff-merge-assist", 0, 0, 131},
-  {"old-line-format", 1, 0, 132},
-  {"new-line-format", 1, 0, 133},
-  {"unchanged-line-format", 1, 0, 134},
-  {"line-format", 1, 0, 135},
-  {"old-group-format", 1, 0, 136},
-  {"new-group-format", 1, 0, 137},
-  {"unchanged-group-format", 1, 0, 138},
-  {"changed-group-format", 1, 0, 139},
-  {"horizon-lines", 1, 0, 140},
-  {"help", 0, 0, 141},
-  {"binary", 0, 0, 142},
-  {0, 0, 0, 0}
-};
-
-int
-main (argc, argv)
-     int argc;
-     char *argv[];
-{
-  int val;
-  int c;
-  int prev = -1;
-  int width = DEFAULT_WIDTH;
-  int show_c_function = 0;
-
-#ifdef __FreeBSD__
-  setlocale(LC_ALL, "");
-#endif
-  /* Do our initializations.  */
-  initialize_main (&argc, &argv);
-  program_name = argv[0];
-  output_style = OUTPUT_NORMAL;
-  context = -1;
-
-  prepend_default_options (getenv ("DIFF_OPTIONS"), &argc, &argv);
-
-  /* Decode the options.  */
-
-  while ((c = getopt_long (argc, argv,
-			   "0123456789abBcC:dD:efF:hHiI:lL:nNopPqrsS:tTuU:vwW:x:X:y",
-			   longopts, 0)) != EOF)
-    {
-      switch (c)
-	{
-	  /* All digits combine in decimal to specify the context-size.  */
-	case '1':
-	case '2':
-	case '3':
-	case '4':
-	case '5':
-	case '6':
-	case '7':
-	case '8':
-	case '9':
-	case '0':
-	  if (context == -1)
-	    context = 0;
-	  /* If a context length has already been specified,
-	     more digits allowed only if they follow right after the others.
-	     Reject two separate runs of digits, or digits after -C.  */
-	  else if (prev < '0' || prev > '9')
-	    fatal ("context length specified twice");
-
-	  context = context * 10 + c - '0';
-	  break;
-
-	case 'a':
-	  /* Treat all files as text files; never treat as binary.  */
-	  always_text_flag = 1;
-	  break;
-
-	case 'b':
-	  /* Ignore changes in amount of white space.  */
-	  ignore_space_change_flag = 1;
-	  ignore_some_changes = 1;
-	  ignore_some_line_changes = 1;
-	  break;
-
-	case 'B':
-	  /* Ignore changes affecting only blank lines.  */
-	  ignore_blank_lines_flag = 1;
-	  ignore_some_changes = 1;
-	  break;
-
-	case 'C':		/* +context[=lines] */
-	case 'U':		/* +unified[=lines] */
-	  if (optarg)
-	    {
-	      if (context >= 0)
-		fatal ("context length specified twice");
-
-	      if (ck_atoi (optarg, &context))
-		fatal ("invalid context length argument");
-	    }
-
-	  /* Falls through.  */
-	case 'c':
-	  /* Make context-style output.  */
-	  specify_style (c == 'U' ? OUTPUT_UNIFIED : OUTPUT_CONTEXT);
-	  break;
-
-	case 'd':
-	  /* Don't discard lines.  This makes things slower (sometimes much
-	     slower) but will find a guaranteed minimal set of changes.  */
-	  no_discards = 1;
-	  break;
-
-	case 'D':
-	  /* Make merged #ifdef output.  */
-	  specify_style (OUTPUT_IFDEF);
-	  {
-	    int i, err = 0;
-	    static char const C_ifdef_group_formats[] =
-	      "#ifndef %s\n%%<#endif /* not %s */\n%c#ifdef %s\n%%>#endif /* %s */\n%c%%=%c#ifndef %s\n%%<#else /* %s */\n%%>#endif /* %s */\n";
-	    char *b = xmalloc (sizeof (C_ifdef_group_formats)
-			       + 7 * strlen(optarg) - 14 /* 7*"%s" */
-			       - 8 /* 5*"%%" + 3*"%c" */);
-	    sprintf (b, C_ifdef_group_formats,
-		     optarg, optarg, 0,
-		     optarg, optarg, 0, 0,
-		     optarg, optarg, optarg);
-	    for (i = 0; i < 4; i++)
-	      {
-		err |= specify_format (&group_format[i], b);
-		b += strlen (b) + 1;
-	      }
-	    if (err)
-	      error ("conflicting #ifdef formats", 0, 0);
-	  }
-	  break;
-
-	case 'e':
-	  /* Make output that is a valid `ed' script.  */
-	  specify_style (OUTPUT_ED);
-	  break;
-
-	case 'f':
-	  /* Make output that looks vaguely like an `ed' script
-	     but has changes in the order they appear in the file.  */
-	  specify_style (OUTPUT_FORWARD_ED);
-	  break;
-
-	case 'F':
-	  /* Show, for each set of changes, the previous line that
-	     matches the specified regexp.  Currently affects only
-	     context-style output.  */
-	  add_regexp (&function_regexp_list, optarg);
-	  break;
-
-	case 'h':
-	  /* Split the files into chunks of around 1500 lines
-	     for faster processing.  Usually does not change the result.
-
-	     This currently has no effect.  */
-	  break;
-
-	case 'H':
-	  /* Turn on heuristics that speed processing of large files
-	     with a small density of changes.  */
-	  heuristic = 1;
-	  break;
-
-	case 'i':
-	  /* Ignore changes in case.  */
-	  ignore_case_flag = 1;
-	  ignore_some_changes = 1;
-	  ignore_some_line_changes = 1;
-	  break;
-
-	case 'I':
-	  /* Ignore changes affecting only lines that match the
-	     specified regexp.  */
-	  add_regexp (&ignore_regexp_list, optarg);
-	  ignore_some_changes = 1;
-	  break;
-
-	case 'l':
-	  /* Pass the output through `pr' to paginate it.  */
-	  paginate_flag = 1;
-#if !defined(SIGCHLD) && defined(SIGCLD)
-#define SIGCHLD SIGCLD
-#endif
-#ifdef SIGCHLD
-	  /* Pagination requires forking and waiting, and
-	     System V fork+wait does not work if SIGCHLD is ignored.  */
-	  signal (SIGCHLD, SIG_DFL);
-#endif
-	  break;
-
-	case 'L':
-	  /* Specify file labels for `-c' output headers.  */
-	  if (!file_label[0])
-	    file_label[0] = optarg;
-	  else if (!file_label[1])
-	    file_label[1] = optarg;
-	  else
-	    fatal ("too many file label options");
-	  break;
-
-	case 'n':
-	  /* Output RCS-style diffs, like `-f' except that each command
-	     specifies the number of lines affected.  */
-	  specify_style (OUTPUT_RCS);
-	  break;
-
-	case 'N':
-	  /* When comparing directories, if a file appears only in one
-	     directory, treat it as present but empty in the other.  */
-	  entire_new_file_flag = 1;
-	  break;
-
-	case 'o':
-	  /* Output in the old tradition style.  */
-	  specify_style (OUTPUT_NORMAL);
-	  break;
-
-	case 'p':
-	  /* Make context-style output and show name of last C function.  */
-	  show_c_function = 1;
-	  add_regexp (&function_regexp_list, "^[_a-zA-Z$]");
-	  break;
-
-	case 'P':
-	  /* When comparing directories, if a file appears only in
-	     the second directory of the two,
-	     treat it as present but empty in the other.  */
-	  unidirectional_new_file_flag = 1;
-	  break;
-
-	case 'q':
-	  no_details_flag = 1;
-	  break;
-
-	case 'r':
-	  /* When comparing directories,
-	     recursively compare any subdirectories found.  */
-	  recursive = 1;
-	  break;
-
-	case 's':
-	  /* Print a message if the files are the same.  */
-	  print_file_same_flag = 1;
-	  break;
-
-	case 'S':
-	  /* When comparing directories, start with the specified
-	     file name.  This is used for resuming an aborted comparison.  */
-	  dir_start_file = optarg;
-	  break;
-
-	case 't':
-	  /* Expand tabs to spaces in the output so that it preserves
-	     the alignment of the input files.  */
-	  tab_expand_flag = 1;
-	  break;
-
-	case 'T':
-	  /* Use a tab in the output, rather than a space, before the
-	     text of an input line, so as to keep the proper alignment
-	     in the input line without changing the characters in it.  */
-	  tab_align_flag = 1;
-	  break;
-
-	case 'u':
-	  /* Output the context diff in unidiff format.  */
-	  specify_style (OUTPUT_UNIFIED);
-	  break;
-
-	case 'v':
-	  printf ("diff - GNU diffutils version %s\n", version_string);
-	  exit (0);
-
-	case 'w':
-	  /* Ignore horizontal white space when comparing lines.  */
-	  ignore_all_space_flag = 1;
-	  ignore_some_changes = 1;
-	  ignore_some_line_changes = 1;
-	  break;
-
-	case 'x':
-	  add_exclude (optarg);
-	  break;
-
-	case 'X':
-	  if (add_exclude_file (optarg) != 0)
-	    pfatal_with_name (optarg);
-	  break;
-
-	case 'y':
-	  /* Use side-by-side (sdiff-style) columnar output. */
-	  specify_style (OUTPUT_SDIFF);
-	  break;
-
-	case 'W':
-	  /* Set the line width for OUTPUT_SDIFF.  */
-	  if (ck_atoi (optarg, &width) || width <= 0)
-	    fatal ("column width must be a positive integer");
-	  break;
-
-	case 129:
-	  sdiff_left_only = 1;
-	  break;
-
-	case 130:
-	  sdiff_skip_common_lines = 1;
-	  break;
-
-	case 131:
-	  /* sdiff-style columns output. */
-	  specify_style (OUTPUT_SDIFF);
-	  sdiff_help_sdiff = 1;
-	  break;
-
-	case 132:
-	case 133:
-	case 134:
-	  specify_style (OUTPUT_IFDEF);
-	  if (specify_format (&line_format[c - 132], optarg) != 0)
-	    error ("conflicting line format", 0, 0);
-	  break;
-
-	case 135:
-	  specify_style (OUTPUT_IFDEF);
-	  {
-	    int i, err = 0;
-	    for (i = 0; i < sizeof (line_format) / sizeof (*line_format); i++)
-	      err |= specify_format (&line_format[i], optarg);
-	    if (err)
-	      error ("conflicting line format", 0, 0);
-	  }
-	  break;
-
-	case 136:
-	case 137:
-	case 138:
-	case 139:
-	  specify_style (OUTPUT_IFDEF);
-	  if (specify_format (&group_format[c - 136], optarg) != 0)
-	    error ("conflicting group format", 0, 0);
-	  break;
-
-	case 140:
-	  if (ck_atoi (optarg, &horizon_lines) || horizon_lines < 0)
-	    fatal ("horizon must be a nonnegative integer");
-	  break;
-
-	case 141:
-	  usage ();
-	  check_stdout ();
-	  exit (0);
-
-	case 142:
-	  /* Use binary I/O when reading and writing data.
-	     On Posix hosts, this has no effect.  */
-#if HAVE_SETMODE
-	  binary_I_O = 1;
-	  setmode (STDOUT_FILENO, O_BINARY);
-#endif
-	  break;
-
-	default:
-	  try_help (0);
-	}
-      prev = c;
-    }
-
-  if (argc - optind != 2)
-    try_help (argc - optind < 2 ? "missing operand" : "extra operand");
-
-
-  {
-    /*
-     *	We maximize first the half line width, and then the gutter width,
-     *	according to the following constraints:
-     *	1.  Two half lines plus a gutter must fit in a line.
-     *	2.  If the half line width is nonzero:
-     *	    a.  The gutter width is at least GUTTER_WIDTH_MINIMUM.
-     *	    b.  If tabs are not expanded to spaces,
-     *		a half line plus a gutter is an integral number of tabs,
-     *		so that tabs in the right column line up.
-     */
-    int t = tab_expand_flag ? 1 : TAB_WIDTH;
-    int off = (width + t + GUTTER_WIDTH_MINIMUM) / (2*t)  *  t;
-    sdiff_half_width = max (0, min (off - GUTTER_WIDTH_MINIMUM, width - off)),
-    sdiff_column2_offset = sdiff_half_width ? off : width;
-  }
-
-  if (show_c_function && output_style != OUTPUT_UNIFIED)
-    specify_style (OUTPUT_CONTEXT);
-
-  if (output_style != OUTPUT_CONTEXT && output_style != OUTPUT_UNIFIED)
-    context = 0;
-  else if (context == -1)
-    /* Default amount of context for -c.  */
-    context = 3;
-
-  if (output_style == OUTPUT_IFDEF)
-    {
-      /* Format arrays are char *, not char const *,
-	 because integer formats are temporarily modified.
-	 But it is safe to assign a constant like "%=" to a format array,
-	 since "%=" does not format any integers.  */
-      int i;
-      for (i = 0; i < sizeof (line_format) / sizeof (*line_format); i++)
-	if (!line_format[i])
-	  line_format[i] = "%l\n";
-      if (!group_format[OLD])
-	group_format[OLD]
-	  = group_format[UNCHANGED] ? group_format[UNCHANGED] : "%<";
-      if (!group_format[NEW])
-	group_format[NEW]
-	  = group_format[UNCHANGED] ? group_format[UNCHANGED] : "%>";
-      if (!group_format[UNCHANGED])
-	group_format[UNCHANGED] = "%=";
-      if (!group_format[CHANGED])
-	group_format[CHANGED] = concat (group_format[OLD],
-					group_format[NEW], "");
-    }
-
-  no_diff_means_no_output =
-    (output_style == OUTPUT_IFDEF ?
-      (!*group_format[UNCHANGED]
-       || (strcmp (group_format[UNCHANGED], "%=") == 0
-	   && !*line_format[UNCHANGED]))
-     : output_style == OUTPUT_SDIFF ? sdiff_skip_common_lines : 1);
-
-  switch_string = option_list (argv + 1, optind - 1);
-
-  val = compare_files (0, argv[optind], 0, argv[optind + 1], 0);
-
-  /* Print any messages that were saved up for last.  */
-  print_message_queue ();
-
-  check_stdout ();
-  exit (val);
-  return val;
-}
-
-/* Add the compiled form of regexp PATTERN to REGLIST.  */
-
-static void
-add_regexp (reglist, pattern)
-     struct regexp_list **reglist;
-     char const *pattern;
-{
-  struct regexp_list *r;
-  char const *m;
-
-  r = (struct regexp_list *) xmalloc (sizeof (*r));
-  bzero (r, sizeof (*r));
-  r->buf.fastmap = xmalloc (256);
-  m = re_compile_pattern (pattern, strlen (pattern), &r->buf);
-  if (m != 0)
-    error ("%s: %s", pattern, m);
-
-  /* Add to the start of the list, since it's easier than the end.  */
-  r->next = *reglist;
-  *reglist = r;
-}
-
-static void
-try_help (reason)
-     char const *reason;
-{
-  if (reason)
-    error ("%s", reason, 0);
-  error ("Try `%s --help' for more information.", program_name, 0);
-  exit (2);
-}
-
-static void
-check_stdout ()
-{
-  if (ferror (stdout) || fclose (stdout) != 0)
-    fatal ("write error");
-}
-
-static char const * const option_help[] = {
-"-i  --ignore-case  Consider upper- and lower-case to be the same.",
-"-w  --ignore-all-space  Ignore all white space.",
-"-b  --ignore-space-change  Ignore changes in the amount of white space.",
-"-B  --ignore-blank-lines  Ignore changes whose lines are all blank.",
-"-I RE  --ignore-matching-lines=RE  Ignore changes whose lines all match RE.",
-#if HAVE_SETMODE
-"--binary  Read and write data in binary mode.",
-#endif
-"-a  --text  Treat all files as text.\n",
-"-c  -C NUM  --context[=NUM]  Output NUM (default 2) lines of copied context.",
-"-u  -U NUM  --unified[=NUM]  Output NUM (default 2) lines of unified context.",
-"  -NUM  Use NUM context lines.",
-"  -L LABEL  --label LABEL  Use LABEL instead of file name.",
-"  -p  --show-c-function  Show which C function each change is in.",
-"  -F RE  --show-function-line=RE  Show the most recent line matching RE.",
-"-q  --brief  Output only whether files differ.",
-"-e  --ed  Output an ed script.",
-"-n  --rcs  Output an RCS format diff.",
-"-y  --side-by-side  Output in two columns.",
-"  -W NUM  --width=NUM  Output at most NUM (default 130) characters per line.",
-"  --left-column  Output only the left column of common lines.",
-"  --suppress-common-lines  Do not output common lines.",
-"-DNAME  --ifdef=NAME  Output merged file to show `#ifdef NAME' diffs.",
-"--GTYPE-group-format=GFMT  Similar, but format GTYPE input groups with GFMT.",
-"--line-format=LFMT  Similar, but format all input lines with LFMT.",
-"--LTYPE-line-format=LFMT  Similar, but format LTYPE input lines with LFMT.",
-"  LTYPE is `old', `new', or `unchanged'.  GTYPE is LTYPE or `changed'.",
-"  GFMT may contain:",
-"    %<  lines from FILE1",
-"    %>  lines from FILE2",
-"    %=  lines common to FILE1 and FILE2",
-"    %[-][WIDTH][.[PREC]]{doxX}LETTER  printf-style spec for LETTER",
-"      LETTERs are as follows for new group, lower case for old group:",
-"        F  first line number",
-"        L  last line number",
-"        N  number of lines = L-F+1",
-"        E  F-1",
-"        M  L+1",
-"  LFMT may contain:",
-"    %L  contents of line",
-"    %l  contents of line, excluding any trailing newline",
-"    %[-][WIDTH][.[PREC]]{doxX}n  printf-style spec for input line number",
-"  Either GFMT or LFMT may contain:",
-"    %%  %",
-"    %c'C'  the single character C",
-"    %c'\\OOO'  the character with octal code OOO\n",
-"-l  --paginate  Pass the output through `pr' to paginate it.",
-"-t  --expand-tabs  Expand tabs to spaces in output.",
-"-T  --initial-tab  Make tabs line up by prepending a tab.\n",
-"-r  --recursive  Recursively compare any subdirectories found.",
-"-N  --new-file  Treat absent files as empty.",
-"-P  --unidirectional-new-file  Treat absent first files as empty.",
-"-s  --report-identical-files  Report when two files are the same.",
-"-x PAT  --exclude=PAT  Exclude files that match PAT.",
-"-X FILE  --exclude-from=FILE  Exclude files that match any pattern in FILE.",
-"-S FILE  --starting-file=FILE  Start with FILE when comparing directories.\n",
-"--horizon-lines=NUM  Keep NUM lines of the common prefix and suffix.",
-"-d  --minimal  Try hard to find a smaller set of changes.",
-"-H  --speed-large-files  Assume large files and many scattered small changes.\n",
-"-v  --version  Output version info.",
-"--help  Output this help.",
-0
-};
-
-static void
-usage ()
-{
-  char const * const *p;
-
-  printf ("Usage: %s [OPTION]... FILE1 FILE2\n\n", program_name);
-  for (p = option_help;  *p;  p++)
-    printf ("  %s\n", *p);
-  printf ("\nIf FILE1 or FILE2 is `-', read standard input.\n");
-}
-
-static int
-specify_format (var, value)
-     char **var;
-     char *value;
-{
-  int err = *var ? strcmp (*var, value) : 0;
-  *var = value;
-  return err;
-}
-
-static void
-specify_style (style)
-     enum output_style style;
-{
-  output_style = style;
-}
-
-static char const *
-filetype (st)
-     struct stat const *st;
-{
-  /* See Posix.2 section 4.17.6.1.1 and Table 5-1 for these formats.
-     To keep diagnostics grammatical, the returned string must start
-     with a consonant.  */
-
-  if (S_ISREG (st->st_mode))
-    {
-      if (st->st_size == 0)
-	return "regular empty file";
-      /* Posix.2 section 5.14.2 seems to suggest that we must read the file
-	 and guess whether it's C, Fortran, etc., but this is somewhat useless
-	 and doesn't reflect historical practice.  We're allowed to guess
-	 wrong, so we don't bother to read the file.  */
-      return "regular file";
-    }
-  if (S_ISDIR (st->st_mode)) return "directory";
-
-  /* other Posix.1 file types */
-#ifdef S_ISBLK
-  if (S_ISBLK (st->st_mode)) return "block special file";
-#endif
-#ifdef S_ISCHR
-  if (S_ISCHR (st->st_mode)) return "character special file";
-#endif
-#ifdef S_ISFIFO
-  if (S_ISFIFO (st->st_mode)) return "fifo";
-#endif
-
-  /* other Posix.1b file types */
-#ifdef S_TYPEISMQ
-  if (S_TYPEISMQ (st)) return "message queue";
-#endif
-#ifdef S_TYPEISSEM
-  if (S_TYPEISSEM (st)) return "semaphore";
-#endif
-#ifdef S_TYPEISSHM
-  if (S_TYPEISSHM (st)) return "shared memory object";
-#endif
-
-  /* other popular file types */
-  /* S_ISLNK is impossible with `fstat' and `stat'.  */
-#ifdef S_ISSOCK
-  if (S_ISSOCK (st->st_mode)) return "socket";
-#endif
-
-  return "weird file";
-}
-
-/* Compare two files (or dirs) with specified names
-   DIR0/NAME0 and DIR1/NAME1, at level DEPTH in directory recursion.
-   (if DIR0 is 0, then the name is just NAME0, etc.)
-   This is self-contained; it opens the files and closes them.
-
-   Value is 0 if files are the same, 1 if different,
-   2 if there is a problem opening them.  */
-
-static int
-compare_files (dir0, name0, dir1, name1, depth)
-     char const *dir0, *dir1;
-     char const *name0, *name1;
-     int depth;
-{
-  struct file_data inf[2];
-  register int i;
-  int val;
-  int same_files;
-  int failed = 0;
-  char *free0 = 0, *free1 = 0;
-
-  /* If this is directory comparison, perhaps we have a file
-     that exists only in one of the directories.
-     If so, just print a message to that effect.  */
-
-  if (! ((name0 != 0 && name1 != 0)
-	 || (unidirectional_new_file_flag && name1 != 0)
-	 || entire_new_file_flag))
-    {
-      char const *name = name0 == 0 ? name1 : name0;
-      char const *dir = name0 == 0 ? dir1 : dir0;
-      message ("Only in %s: %s\n", dir, name);
-      /* Return 1 so that diff_dirs will return 1 ("some files differ").  */
-      return 1;
-    }
-
-  bzero (inf, sizeof (inf));
-
-  /* Mark any nonexistent file with -1 in the desc field.  */
-  /* Mark unopened files (e.g. directories) with -2. */
-
-  inf[0].desc = name0 == 0 ? -1 : -2;
-  inf[1].desc = name1 == 0 ? -1 : -2;
-
-  /* Now record the full name of each file, including nonexistent ones.  */
-
-  if (name0 == 0)
-    name0 = name1;
-  if (name1 == 0)
-    name1 = name0;
-
-  inf[0].name = dir0 == 0 ? name0 : (free0 = dir_file_pathname (dir0, name0));
-  inf[1].name = dir1 == 0 ? name1 : (free1 = dir_file_pathname (dir1, name1));
-
-  /* Stat the files.  Record whether they are directories.  */
-
-  for (i = 0; i <= 1; i++)
-    {
-      if (inf[i].desc != -1)
-	{
-	  int stat_result;
-
-	  if (i && filename_cmp (inf[i].name, inf[0].name) == 0)
-	    {
-	      inf[i].stat = inf[0].stat;
-	      stat_result = 0;
-	    }
-	  else if (strcmp (inf[i].name, "-") == 0)
-	    {
-	      inf[i].desc = STDIN_FILENO;
-	      stat_result = fstat (STDIN_FILENO, &inf[i].stat);
-	      if (stat_result == 0 && S_ISREG (inf[i].stat.st_mode))
-		{
-		  off_t pos = lseek (STDIN_FILENO, (off_t) 0, SEEK_CUR);
-		  if (pos == -1)
-		    stat_result = -1;
-		  else
-		    {
-		      if (pos <= inf[i].stat.st_size)
-			inf[i].stat.st_size -= pos;
-		      else
-			inf[i].stat.st_size = 0;
-		      /* Posix.2 4.17.6.1.4 requires current time for stdin.  */
-		      time (&inf[i].stat.st_mtime);
-		    }
-		}
-	    }
-	  else
-	    stat_result = stat (inf[i].name, &inf[i].stat);
-
-	  if (stat_result != 0)
-	    {
-	      perror_with_name (inf[i].name);
-	      failed = 1;
-	    }
-	  else
-	    {
-	      inf[i].dir_p = S_ISDIR (inf[i].stat.st_mode) && inf[i].desc != 0;
-	      if (inf[1 - i].desc == -1)
-		{
-		  inf[1 - i].dir_p = inf[i].dir_p;
-		  inf[1 - i].stat.st_mode = inf[i].stat.st_mode;
-		}
-	    }
-	}
-    }
-
-  if (! failed && depth == 0 && inf[0].dir_p != inf[1].dir_p)
-    {
-      /* If one is a directory, and it was specified in the command line,
-	 use the file in that dir with the other file's basename.  */
-
-      int fnm_arg = inf[0].dir_p;
-      int dir_arg = 1 - fnm_arg;
-      char const *fnm = inf[fnm_arg].name;
-      char const *dir = inf[dir_arg].name;
-      char const *p = filename_lastdirchar (fnm);
-      char const *filename = inf[dir_arg].name
-	= dir_file_pathname (dir, p ? p + 1 : fnm);
-
-      if (strcmp (fnm, "-") == 0)
-	fatal ("can't compare - to a directory");
-
-      if (stat (filename, &inf[dir_arg].stat) != 0)
-	{
-	  perror_with_name (filename);
-	  failed = 1;
-	}
-      else
-	inf[dir_arg].dir_p = S_ISDIR (inf[dir_arg].stat.st_mode);
-    }
-
-  if (failed)
-    {
-
-      /* If either file should exist but does not, return 2.  */
-
-      val = 2;
-
-    }
-  else if ((same_files = inf[0].desc != -1 && inf[1].desc != -1
-			 && 0 < same_file (&inf[0].stat, &inf[1].stat))
-	   && no_diff_means_no_output)
-    {
-      /* The two named files are actually the same physical file.
-	 We know they are identical without actually reading them.  */
-
-      val = 0;
-    }
-  else if (inf[0].dir_p & inf[1].dir_p)
-    {
-      if (output_style == OUTPUT_IFDEF)
-	fatal ("-D option not supported with directories");
-
-      /* If both are directories, compare the files in them.  */
-
-      if (depth > 0 && !recursive)
-	{
-	  /* But don't compare dir contents one level down
-	     unless -r was specified.  */
-	  message ("Common subdirectories: %s and %s\n",
-		   inf[0].name, inf[1].name);
-	  val = 0;
-	}
-      else
-	{
-	  val = diff_dirs (inf, compare_files, depth);
-	}
-
-    }
-  else if ((inf[0].dir_p | inf[1].dir_p)
-	   || (depth > 0
-	       && (! S_ISREG (inf[0].stat.st_mode)
-		   || ! S_ISREG (inf[1].stat.st_mode))))
-    {
-      /* Perhaps we have a subdirectory that exists only in one directory.
-	 If so, just print a message to that effect.  */
-
-      if (inf[0].desc == -1 || inf[1].desc == -1)
-	{
-	  if ((inf[0].dir_p | inf[1].dir_p)
-	      && recursive
-	      && (entire_new_file_flag
-		  || (unidirectional_new_file_flag && inf[0].desc == -1)))
-	    val = diff_dirs (inf, compare_files, depth);
-	  else
-	    {
-	      char const *dir = (inf[0].desc == -1) ? dir1 : dir0;
-	      /* See Posix.2 section 4.17.6.1.1 for this format.  */
-	      message ("Only in %s: %s\n", dir, name0);
-	      val = 1;
-	    }
-	}
-      else
-	{
-	  /* We have two files that are not to be compared.  */
-
-	  /* See Posix.2 section 4.17.6.1.1 for this format.  */
-	  message5 ("File %s is a %s while file %s is a %s\n",
-		    inf[0].name, filetype (&inf[0].stat),
-		    inf[1].name, filetype (&inf[1].stat));
-
-	  /* This is a difference.  */
-	  val = 1;
-	}
-    }
-  else if ((no_details_flag & ~ignore_some_changes)
-	   && inf[0].stat.st_size != inf[1].stat.st_size
-	   && (inf[0].desc == -1 || S_ISREG (inf[0].stat.st_mode))
-	   && (inf[1].desc == -1 || S_ISREG (inf[1].stat.st_mode)))
-    {
-      message ("Files %s and %s differ\n", inf[0].name, inf[1].name);
-      val = 1;
-    }
-  else
-    {
-      /* Both exist and neither is a directory.  */
-
-      /* Open the files and record their descriptors.  */
-
-      if (inf[0].desc == -2)
-	if ((inf[0].desc = open (inf[0].name, O_RDONLY, 0)) < 0)
-	  {
-	    perror_with_name (inf[0].name);
-	    failed = 1;
-	  }
-      if (inf[1].desc == -2)
-	if (same_files)
-	  inf[1].desc = inf[0].desc;
-	else if ((inf[1].desc = open (inf[1].name, O_RDONLY, 0)) < 0)
-	  {
-	    perror_with_name (inf[1].name);
-	    failed = 1;
-	  }
-
-#if HAVE_SETMODE
-      if (binary_I_O)
-	for (i = 0; i <= 1; i++)
-	  if (0 <= inf[i].desc)
-	    setmode (inf[i].desc, O_BINARY);
-#endif
-
-      /* Compare the files, if no error was found.  */
-
-      val = failed ? 2 : diff_2_files (inf, depth);
-
-      /* Close the file descriptors.  */
-
-      if (inf[0].desc >= 0 && close (inf[0].desc) != 0)
-	{
-	  perror_with_name (inf[0].name);
-	  val = 2;
-	}
-      if (inf[1].desc >= 0 && inf[0].desc != inf[1].desc
-	  && close (inf[1].desc) != 0)
-	{
-	  perror_with_name (inf[1].name);
-	  val = 2;
-	}
-    }
-
-  /* Now the comparison has been done, if no error prevented it,
-     and VAL is the value this function will return.  */
-
-  if (val == 0 && !inf[0].dir_p)
-    {
-      if (print_file_same_flag)
-	message ("Files %s and %s are identical\n",
-		 inf[0].name, inf[1].name);
-    }
-  else
-    fflush (stdout);
-
-  if (free0)
-    free (free0);
-  if (free1)
-    free (free1);
-
-  return val;
-}
diff --git a/contrib/diff/diff.h b/contrib/diff/diff.h
deleted file mode 100644
index 9a92e0d9f184..000000000000
--- a/contrib/diff/diff.h
+++ /dev/null
@@ -1,341 +0,0 @@
-/* Shared definitions for GNU DIFF
-   Copyright (C) 1988, 89, 91, 92, 93 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 GNU DIFF; see the file COPYING.  If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
-/* $FreeBSD$ */
-
-#include "system.h"
-#include <stdio.h>
-#include "regex.h"
-
-#define TAB_WIDTH 8
-
-/* Variables for command line options */
-
-#ifndef GDIFF_MAIN
-#define EXTERN extern
-#else
-#define EXTERN
-#endif
-
-enum output_style {
-  /* Default output style.  */
-  OUTPUT_NORMAL,
-  /* Output the differences with lines of context before and after (-c).  */
-  OUTPUT_CONTEXT,
-  /* Output the differences in a unified context diff format (-u). */
-  OUTPUT_UNIFIED,
-  /* Output the differences as commands suitable for `ed' (-e).  */
-  OUTPUT_ED,
-  /* Output the diff as a forward ed script (-f).  */
-  OUTPUT_FORWARD_ED,
-  /* Like -f, but output a count of changed lines in each "command" (-n). */
-  OUTPUT_RCS,
-  /* Output merged #ifdef'd file (-D).  */
-  OUTPUT_IFDEF,
-  /* Output sdiff style (-y).  */
-  OUTPUT_SDIFF
-};
-
-/* True for output styles that are robust,
-   i.e. can handle a file that ends in a non-newline.  */
-#define ROBUST_OUTPUT_STYLE(S) ((S) != OUTPUT_ED && (S) != OUTPUT_FORWARD_ED)
-
-EXTERN enum output_style output_style;
-
-/* Nonzero if output cannot be generated for identical files.  */
-EXTERN int no_diff_means_no_output;
-
-/* Number of lines of context to show in each set of diffs.
-   This is zero when context is not to be shown.  */
-EXTERN int      context;
-
-/* Consider all files as text files (-a).
-   Don't interpret codes over 0177 as implying a "binary file".  */
-EXTERN int	always_text_flag;
-
-/* Number of lines to keep in identical prefix and suffix.  */
-EXTERN int      horizon_lines;
-
-/* Ignore changes in horizontal white space (-b).  */
-EXTERN int      ignore_space_change_flag;
-
-/* Ignore all horizontal white space (-w).  */
-EXTERN int      ignore_all_space_flag;
-
-/* Ignore changes that affect only blank lines (-B).  */
-EXTERN int      ignore_blank_lines_flag;
-
-/* 1 if lines may match even if their contents do not match exactly.
-   This depends on various options.  */
-EXTERN int      ignore_some_line_changes;
-
-/* 1 if files may match even if their contents are not byte-for-byte identical.
-   This depends on various options.  */
-EXTERN int      ignore_some_changes;
-
-/* Ignore differences in case of letters (-i).  */
-EXTERN int      ignore_case_flag;
-
-/* File labels for `-c' output headers (-L).  */
-EXTERN char *file_label[2];
-
-struct regexp_list
-{
-  struct re_pattern_buffer buf;
-  struct regexp_list *next;
-};
-
-/* Regexp to identify function-header lines (-F).  */
-EXTERN struct regexp_list *function_regexp_list;
-
-/* Ignore changes that affect only lines matching this regexp (-I).  */
-EXTERN struct regexp_list *ignore_regexp_list;
-
-/* Say only whether files differ, not how (-q).  */
-EXTERN int 	no_details_flag;
-
-/* Report files compared that match (-s).
-   Normally nothing is output when that happens.  */
-EXTERN int      print_file_same_flag;
-
-/* Output the differences with exactly 8 columns added to each line
-   so that any tabs in the text line up properly (-T).  */
-EXTERN int	tab_align_flag;
-
-/* Expand tabs in the output so the text lines up properly
-   despite the characters added to the front of each line (-t).  */
-EXTERN int	tab_expand_flag;
-
-/* In directory comparison, specify file to start with (-S).
-   All file names less than this name are ignored.  */
-EXTERN char	*dir_start_file;
-
-/* If a file is new (appears in only one dir)
-   include its entire contents (-N).
-   Then `patch' would create the file with appropriate contents.  */
-EXTERN int	entire_new_file_flag;
-
-/* If a file is new (appears in only the second dir)
-   include its entire contents (-P).
-   Then `patch' would create the file with appropriate contents.  */
-EXTERN int	unidirectional_new_file_flag;
-
-/* Pipe each file's output through pr (-l).  */
-EXTERN int	paginate_flag;
-
-enum line_class {
-  /* Lines taken from just the first file.  */
-  OLD,
-  /* Lines taken from just the second file.  */
-  NEW,
-  /* Lines common to both files.  */
-  UNCHANGED,
-  /* A hunk containing both old and new lines (line groups only).  */
-  CHANGED
-};
-
-/* Line group formats for old, new, unchanged, and changed groups.  */
-EXTERN char *group_format[CHANGED + 1];
-
-/* Line formats for old, new, and unchanged lines.  */
-EXTERN char *line_format[UNCHANGED + 1];
-
-/* If using OUTPUT_SDIFF print extra information to help the sdiff filter. */
-EXTERN int sdiff_help_sdiff;
-
-/* Tell OUTPUT_SDIFF to show only the left version of common lines. */
-EXTERN int sdiff_left_only;
-
-/* Tell OUTPUT_SDIFF to not show common lines. */
-EXTERN int sdiff_skip_common_lines;
-
-/* The half line width and column 2 offset for OUTPUT_SDIFF.  */
-EXTERN unsigned sdiff_half_width;
-EXTERN unsigned sdiff_column2_offset;
-
-/* String containing all the command options diff received,
-   with spaces between and at the beginning but none at the end.
-   If there were no options given, this string is empty.  */
-EXTERN char *	switch_string;
-
-/* Nonzero means use heuristics for better speed.  */
-EXTERN int	heuristic;
-
-/* Name of program the user invoked (for error messages).  */
-EXTERN char *program_name;
-
-/* The result of comparison is an "edit script": a chain of `struct change'.
-   Each `struct change' represents one place where some lines are deleted
-   and some are inserted.
-
-   LINE0 and LINE1 are the first affected lines in the two files (origin 0).
-   DELETED is the number of lines deleted here from file 0.
-   INSERTED is the number of lines inserted here in file 1.
-
-   If DELETED is 0 then LINE0 is the number of the line before
-   which the insertion was done; vice versa for INSERTED and LINE1.  */
-
-struct change
-{
-  struct change *link;		/* Previous or next edit command  */
-  int inserted;			/* # lines of file 1 changed here.  */
-  int deleted;			/* # lines of file 0 changed here.  */
-  int line0;			/* Line number of 1st deleted line.  */
-  int line1;			/* Line number of 1st inserted line.  */
-  char ignore;			/* Flag used in context.c */
-};
-
-/* Structures that describe the input files.  */
-
-/* Data on one input file being compared.  */
-
-struct file_data {
-    int             desc;	/* File descriptor  */
-    char const      *name;	/* File name  */
-    struct stat     stat;	/* File status from fstat()  */
-    int             dir_p;	/* nonzero if file is a directory  */
-
-    /* Buffer in which text of file is read.  */
-    char *	    buffer;
-    /* Allocated size of buffer.  */
-    size_t	    bufsize;
-    /* Number of valid characters now in the buffer. */
-    size_t	    buffered_chars;
-
-    /* Array of pointers to lines in the file.  */
-    char const **linbuf;
-
-    /* linbuf_base <= buffered_lines <= valid_lines <= alloc_lines.
-       linebuf[linbuf_base ... buffered_lines - 1] are possibly differing.
-       linebuf[linbuf_base ... valid_lines - 1] contain valid data.
-       linebuf[linbuf_base ... alloc_lines - 1] are allocated.  */
-    int linbuf_base, buffered_lines, valid_lines, alloc_lines;
-
-    /* Pointer to end of prefix of this file to ignore when hashing. */
-    char const *prefix_end;
-
-    /* Count of lines in the prefix.
-       There are this many lines in the file before linbuf[0].  */
-    int prefix_lines;
-
-    /* Pointer to start of suffix of this file to ignore when hashing. */
-    char const *suffix_begin;
-
-    /* Vector, indexed by line number, containing an equivalence code for
-       each line.  It is this vector that is actually compared with that
-       of another file to generate differences. */
-    int		   *equivs;
-
-    /* Vector, like the previous one except that
-       the elements for discarded lines have been squeezed out.  */
-    int		   *undiscarded;
-
-    /* Vector mapping virtual line numbers (not counting discarded lines)
-       to real ones (counting those lines).  Both are origin-0.  */
-    int		   *realindexes;
-
-    /* Total number of nondiscarded lines. */
-    int		    nondiscarded_lines;
-
-    /* Vector, indexed by real origin-0 line number,
-       containing 1 for a line that is an insertion or a deletion.
-       The results of comparison are stored here.  */
-    char	   *changed_flag;
-
-    /* 1 if file ends in a line with no final newline. */
-    int		    missing_newline;
-
-    /* 1 more than the maximum equivalence value used for this or its
-       sibling file. */
-    int equiv_max;
-};
-
-/* Describe the two files currently being compared.  */
-
-EXTERN struct file_data files[2];
-
-/* Stdio stream to output diffs to.  */
-
-EXTERN FILE *outfile;
-
-/* Declare various functions.  */
-
-/* analyze.c */
-int diff_2_files PARAMS((struct file_data[], int));
-
-/* context.c */
-void print_context_header PARAMS((struct file_data[], int));
-void print_context_script PARAMS((struct change *, int));
-
-/* diff.c */
-int excluded_filename PARAMS((char const *));
-
-/* dir.c */
-int diff_dirs PARAMS((struct file_data const[], int (*) PARAMS((char const *, char const *, char const *, char const *, int)), int));
-
-/* ed.c */
-void print_ed_script PARAMS((struct change *));
-void pr_forward_ed_script PARAMS((struct change *));
-
-/* ifdef.c */
-void print_ifdef_script PARAMS((struct change *));
-
-/* io.c */
-int read_files PARAMS((struct file_data[], int));
-int sip PARAMS((struct file_data *, int));
-void slurp PARAMS((struct file_data *));
-
-/* normal.c */
-void print_normal_script PARAMS((struct change *));
-
-/* rcs.c */
-void print_rcs_script PARAMS((struct change *));
-
-/* side.c */
-void print_sdiff_script PARAMS((struct change *));
-
-/* util.c */
-VOID *xmalloc PARAMS((size_t));
-VOID *xrealloc PARAMS((VOID *, size_t));
-char *concat PARAMS((char const *, char const *, char const *));
-char *dir_file_pathname PARAMS((char const *, char const *));
-int change_letter PARAMS((int, int));
-int line_cmp PARAMS((char const *, char const *));
-int translate_line_number PARAMS((struct file_data const *, int));
-struct change *find_change PARAMS((struct change *));
-struct change *find_reverse_change PARAMS((struct change *));
-void analyze_hunk PARAMS((struct change *, int *, int *, int *, int *, int *, int *));
-void begin_output PARAMS((void));
-void debug_script PARAMS((struct change *));
-void error PARAMS((char const *, char const *, char const *));
-void fatal PARAMS((char const *));
-void finish_output PARAMS((void));
-void message PARAMS((char const *, char const *, char const *));
-void message5 PARAMS((char const *, char const *, char const *, char const *, char const *));
-void output_1_line PARAMS((char const *, char const *, char const *, char const *));
-void perror_with_name PARAMS((char const *));
-void pfatal_with_name PARAMS((char const *));
-void print_1_line PARAMS((char const *, char const * const *));
-void print_message_queue PARAMS((void));
-void print_number_range PARAMS((int, struct file_data *, int, int));
-void print_script PARAMS((struct change *, struct change * (*) PARAMS((struct change *)), void (*) PARAMS((struct change *))));
-void setup_output PARAMS((char const *, char const *, int));
-void translate_range PARAMS((struct file_data const *, int, int, int *, int *));
-
-/* version.c */
-extern char const version_string[];
diff --git a/contrib/diff/prepend_args.c b/contrib/diff/prepend_args.c
deleted file mode 100644
index 5dee55efccc1..000000000000
--- a/contrib/diff/prepend_args.c
+++ /dev/null
@@ -1,87 +0,0 @@
-/* prepend_args.c - utilility programs for manpiulating argv[]
-   Copyright (C) 1999 Free Software Foundation, Inc.
-
-   This program 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.
-
-   This program 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; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-   02111-1307, USA.  */
-
-/* $FreeBSD$ */
-
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-#include "system.h"
-#include "diff.h"
-#include "prepend_args.h"
-
-
-/* Find the white-space-separated options specified by OPTIONS, and
-   using BUF to store copies of these options, set ARGV[0], ARGV[1],
-   etc. to the option copies.  Return the number N of options found.
-   Do not set ARGV[N] to NULL.  If ARGV is NULL, do not store ARGV[0]
-   etc.  Backslash can be used to escape whitespace (and backslashes).  */
-static int
-prepend_args (options, buf, argv)
-     char const *options;
-     char *buf;
-     char **argv;
-{
-  char const *o = options;
-  char *b = buf;
-  int n = 0;
-
-  for (;;)
-    {
-      while (ISSPACE ((unsigned char) *o))
-	o++;
-      if (!*o)
-	return n;
-      if (argv)
-	argv[n] = b;
-      n++;
-
-      do
-	if ((*b++ = *o++) == '\\' && *o)
-	  b[-1] = *o++;
-      while (*o && ! ISSPACE ((unsigned char) *o));
-
-      *b++ = '\0';
-    }
-}
-
-/* Prepend the whitespace-separated options in OPTIONS to the argument
-   vector of a main program with argument count *PARGC and argument
-   vector *PARGV.  */
-void
-prepend_default_options (options, pargc, pargv)
-     char const *options;
-     int *pargc;
-     char ***pargv;
-{
-  if (options)
-    {
-      char *buf = xmalloc (strlen (options) + 1);
-      int prepended = prepend_args (options, buf, (char **) NULL);
-      int argc = *pargc;
-      char * const *argv = *pargv;
-      char **pp = (char **) xmalloc ((prepended + argc + 1) * sizeof *pp);
-      *pargc = prepended + argc;
-      *pargv = pp;
-      *pp++ = *argv++;
-      pp += prepend_args (options, buf, pp);
-      while ((*pp++ = *argv++))
-	continue;
-    }
-}
diff --git a/contrib/diff/prepend_args.h b/contrib/diff/prepend_args.h
deleted file mode 100644
index 3f72cc2fd112..000000000000
--- a/contrib/diff/prepend_args.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/* prepend_args.h - utilility programs for manpiulating argv[]
-   Copyright (C) 1999 Free Software Foundation, Inc.
-
-   This program 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.
-
-   This program 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; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-   02111-1307, USA.  */
-
-/* $FreeBSD$ */
-
-void prepend_default_options PARAMS ((char const *, int *, char ***));
diff --git a/contrib/diff/sdiff.c b/contrib/diff/sdiff.c
deleted file mode 100644
index 5b5759ededcd..000000000000
--- a/contrib/diff/sdiff.c
+++ /dev/null
@@ -1,1109 +0,0 @@
-/* SDIFF -- interactive merge front end to diff
-   Copyright (C) 1992, 1993, 1994 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 GNU DIFF; see the file COPYING.  If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
-
-/* GNU SDIFF was written by Thomas Lord. */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include "system.h"
-#include <stdio.h>
-#include <signal.h>
-#include "getopt.h"
-
-/* Size of chunks read from files which must be parsed into lines. */
-#define SDIFF_BUFSIZE ((size_t) 65536)
-
-/* Default name of the diff program */
-#ifndef DIFF_PROGRAM
-#define DIFF_PROGRAM "/usr/bin/diff"
-#endif
-
-/* Users' editor of nonchoice */
-#ifndef DEFAULT_EDITOR_PROGRAM
-#define DEFAULT_EDITOR_PROGRAM "ed"
-#endif
-
-extern char version_string[];
-static char const *program_name;
-static char const *diffbin = DIFF_PROGRAM;
-static char const *edbin = DEFAULT_EDITOR_PROGRAM;
-static char const **diffargv;
-
-static char *tmpname;
-static int volatile tmpmade;
-
-#if HAVE_FORK
-static pid_t volatile diffpid;
-#endif
-
-struct line_filter;
-
-static FILE *ck_fopen PARAMS((char const *, char const *));
-static RETSIGTYPE catchsig PARAMS((int));
-static VOID *xmalloc PARAMS((size_t));
-static char const *expand_name PARAMS((char *, int, char const *));
-static int edit PARAMS((struct line_filter *, int, struct line_filter *, int, FILE*));
-static int interact PARAMS((struct line_filter *, struct line_filter *, struct line_filter *, FILE*));
-static int lf_snarf PARAMS((struct line_filter *, char *, size_t));
-static int skip_white PARAMS((void));
-static size_t ck_fread PARAMS((char *, size_t, FILE *));
-static size_t lf_refill PARAMS((struct line_filter *));
-static void checksigs PARAMS((void));
-static void ck_fclose PARAMS((FILE *));
-static void ck_fflush PARAMS((FILE *));
-static void ck_fwrite PARAMS((char const *, size_t, FILE *));
-static void cleanup PARAMS((void));
-static void diffarg PARAMS((char const *));
-static void execdiff PARAMS((void));
-static void exiterr PARAMS((void));
-static void fatal PARAMS((char const *));
-static void flush_line PARAMS((void));
-static void give_help PARAMS((void));
-static void lf_copy PARAMS((struct line_filter *, int, FILE *));
-static void lf_init PARAMS((struct line_filter *, FILE *));
-static void lf_skip PARAMS((struct line_filter *, int));
-static void perror_fatal PARAMS((char const *));
-static void trapsigs PARAMS((void));
-static void try_help PARAMS((char const *));
-static void untrapsig PARAMS((int));
-static void usage PARAMS((void));
-
-static int diraccess PARAMS((char const *));
-
-/* Options: */
-
-/* name of output file if -o spec'd */
-static char *out_file;
-
-/* do not print common lines if true, set by -s option */
-static int suppress_common_flag;
-
-static struct option const longopts[] =
-{
-  {"ignore-blank-lines", 0, 0, 'B'},
-  {"speed-large-files", 0, 0, 'H'},
-  {"ignore-matching-lines", 1, 0, 'I'},
-  {"ignore-all-space", 0, 0, 'W'}, /* swap W and w for historical reasons */
-  {"text", 0, 0, 'a'},
-  {"ignore-space-change", 0, 0, 'b'},
-  {"minimal", 0, 0, 'd'},
-  {"ignore-case", 0, 0, 'i'},
-  {"left-column", 0, 0, 'l'},
-  {"output", 1, 0, 'o'},
-  {"suppress-common-lines", 0, 0, 's'},
-  {"expand-tabs", 0, 0, 't'},
-  {"width", 1, 0, 'w'},
-  {"version", 0, 0, 'v'},
-  {"help", 0, 0, 129},
-  {0, 0, 0, 0}
-};
-
-static void
-try_help (reason)
-     char const *reason;
-{
-  if (reason)
-    fprintf (stderr, "%s: %s\n", program_name, reason);
-  fprintf (stderr, "%s: Try `%s --help' for more information.\n",
-	   program_name, program_name);
-  exit (2);
-}
-
-static void
-usage ()
-{
-  printf ("Usage: %s [OPTIONS]... FILE1 FILE2\n\n", program_name);
-  printf ("%s", "\
-  -o FILE  --output=FILE  Operate interactively, sending output to FILE.\n\n");
-  printf ("%s", "\
-  -i  --ignore-case  Consider upper- and lower-case to be the same.\n\
-  -W  --ignore-all-space  Ignore all white space.\n\
-  -b  --ignore-space-change  Ignore changes in the amount of white space.\n\
-  -B  --ignore-blank-lines  Ignore changes whose lines are all blank.\n\
-  -I RE  --ignore-matching-lines=RE  Ignore changes whose lines all match RE.\n\
-  -a  --text  Treat all files as text.\n\n");
-  printf ("%s", "\
-  -w NUM  --width=NUM  Output at most NUM (default 130) characters per line.\n\
-  -l  --left-column  Output only the left column of common lines.\n\
-  -s  --suppress-common-lines  Do not output common lines.\n\n");
-  printf ("\
-  -t  --expand-tabs  Expand tabs to spaces in output.\n\n");
-  printf ("%s", "\
-  -d  --minimal  Try hard to find a smaller set of changes.\n\
-  -H  --speed-large-files  Assume large files and many scattered small changes.\n\n");
- printf ("%s", "\
-  -v  --version  Output version info.\n\
-  --help  Output this help.\n\n\
-If FILE1 or FILE2 is `-', read standard input.\n");
-}
-
-static void
-cleanup ()
-{
-#if HAVE_FORK
-  if (0 < diffpid)
-    kill (diffpid, SIGPIPE);
-#endif
-  if (tmpmade)
-    unlink (tmpname);
-}
-
-static void
-exiterr ()
-{
-  cleanup ();
-  untrapsig (0);
-  checksigs ();
-  exit (2);
-}
-
-static void
-fatal (msg)
-     char const *msg;
-{
-  fprintf (stderr, "%s: %s\n", program_name, msg);
-  exiterr ();
-}
-
-static void
-perror_fatal (msg)
-     char const *msg;
-{
-  int e = errno;
-  checksigs ();
-  fprintf (stderr, "%s: ", program_name);
-  errno = e;
-  perror (msg);
-  exiterr ();
-}
-
-
-/* malloc freely or DIE! */
-static VOID *
-xmalloc (size)
-     size_t size;
-{
-  VOID *r = (VOID *) malloc (size);
-  if (!r)
-    fatal ("memory exhausted");
-  return r;
-}
-
-static FILE *
-ck_fopen (fname, type)
-     char const *fname, *type;
-{
-  FILE *r = fopen (fname, type);
-  if (!r)
-    perror_fatal (fname);
-  return r;
-}
-
-static void
-ck_fclose (f)
-     FILE *f;
-{
-  if (fclose (f))
-    perror_fatal ("input/output error");
-}
-
-static size_t
-ck_fread (buf, size, f)
-     char *buf;
-     size_t size;
-     FILE *f;
-{
-  size_t r = fread (buf, sizeof (char), size, f);
-  if (r == 0 && ferror (f))
-    perror_fatal ("input error");
-  return r;
-}
-
-static void
-ck_fwrite (buf, size, f)
-     char const *buf;
-     size_t size;
-     FILE *f;
-{
-  if (fwrite (buf, sizeof (char), size, f) != size)
-    perror_fatal ("output error");
-}
-
-static void
-ck_fflush (f)
-     FILE *f;
-{
-  if (fflush (f) != 0)
-    perror_fatal ("output error");
-}
-
-static char const *
-expand_name (name, is_dir, other_name)
-     char *name;
-     int is_dir;
-     char const *other_name;
-{
-  if (strcmp (name, "-") == 0)
-    fatal ("cannot interactively merge standard input");
-  if (!is_dir)
-    return name;
-  else
-    {
-      /* Yield NAME/BASE, where BASE is OTHER_NAME's basename.  */
-      char const *p = filename_lastdirchar (other_name);
-      char const *base = p ? p+1 : other_name;
-      size_t namelen = strlen (name), baselen = strlen (base);
-      char *r = xmalloc (namelen + baselen + 2);
-      memcpy (r, name, namelen);
-      r[namelen] = '/';
-      memcpy (r + namelen + 1, base, baselen + 1);
-      return r;
-    }
-}
-
-
-
-struct line_filter {
-  FILE *infile;
-  char *bufpos;
-  char *buffer;
-  char *buflim;
-};
-
-static void
-lf_init (lf, infile)
-     struct line_filter *lf;
-     FILE *infile;
-{
-  lf->infile = infile;
-  lf->bufpos = lf->buffer = lf->buflim = xmalloc (SDIFF_BUFSIZE + 1);
-  lf->buflim[0] = '\n';
-}
-
-/* Fill an exhausted line_filter buffer from its INFILE */
-static size_t
-lf_refill (lf)
-     struct line_filter *lf;
-{
-  size_t s = ck_fread (lf->buffer, SDIFF_BUFSIZE, lf->infile);
-  lf->bufpos = lf->buffer;
-  lf->buflim = lf->buffer + s;
-  lf->buflim[0] = '\n';
-  checksigs ();
-  return s;
-}
-
-/* Advance LINES on LF's infile, copying lines to OUTFILE */
-static void
-lf_copy (lf, lines, outfile)
-     struct line_filter *lf;
-     int lines;
-     FILE *outfile;
-{
-  char *start = lf->bufpos;
-
-  while (lines)
-    {
-      lf->bufpos = (char *) memchr (lf->bufpos, '\n', lf->buflim - lf->bufpos);
-      if (! lf->bufpos)
-	{
-	  ck_fwrite (start, lf->buflim - start, outfile);
-	  if (! lf_refill (lf))
-	    return;
-	  start = lf->bufpos;
-	}
-      else
-	{
-	  --lines;
-	  ++lf->bufpos;
-	}
-    }
-
-  ck_fwrite (start, lf->bufpos - start, outfile);
-}
-
-/* Advance LINES on LF's infile without doing output */
-static void
-lf_skip (lf, lines)
-     struct line_filter *lf;
-     int lines;
-{
-  while (lines)
-    {
-      lf->bufpos = (char *) memchr (lf->bufpos, '\n', lf->buflim - lf->bufpos);
-      if (! lf->bufpos)
-	{
-	  if (! lf_refill (lf))
-	    break;
-	}
-      else
-	{
-	  --lines;
-	  ++lf->bufpos;
-	}
-    }
-}
-
-/* Snarf a line into a buffer.  Return EOF if EOF, 0 if error, 1 if OK.  */
-static int
-lf_snarf (lf, buffer, bufsize)
-     struct line_filter *lf;
-     char *buffer;
-     size_t bufsize;
-{
-  char *start = lf->bufpos;
-
-  for (;;)
-    {
-      char *next = (char *) memchr (start, '\n', lf->buflim + 1 - start);
-      size_t s = next - start;
-      if (bufsize <= s)
-	return 0;
-      memcpy (buffer, start, s);
-      if (next < lf->buflim)
-	{
-	  buffer[s] = 0;
-	  lf->bufpos = next + 1;
-	  return 1;
-	}
-      if (! lf_refill (lf))
-	return s ? 0 : EOF;
-      buffer += s;
-      bufsize -= s;
-      start = next;
-    }
-}
-
-
-
-int
-main (argc, argv)
-     int argc;
-     char *argv[];
-{
-  int opt;
-  char *editor;
-  char *differ;
-
-  initialize_main (&argc, &argv);
-  program_name = argv[0];
-
-  editor = getenv ("EDITOR");
-  if (editor)
-    edbin = editor;
-  differ = getenv ("DIFF");
-  if (differ)
-    diffbin = differ;
-
-  diffarg ("diff");
-
-  /* parse command line args */
-  while ((opt = getopt_long (argc, argv, "abBdHiI:lo:stvw:W", longopts, 0))
-	 != EOF)
-    {
-      switch (opt)
-	{
-	case 'a':
-	  diffarg ("-a");
-	  break;
-
-	case 'b':
-	  diffarg ("-b");
-	  break;
-
-	case 'B':
-	  diffarg ("-B");
-	  break;
-
-	case 'd':
-	  diffarg ("-d");
-	  break;
-
-	case 'H':
-	  diffarg ("-H");
-	  break;
-
-	case 'i':
-	  diffarg ("-i");
-	  break;
-
-	case 'I':
-	  diffarg ("-I");
-	  diffarg (optarg);
-	  break;
-
-	case 'l':
-	  diffarg ("--left-column");
-	  break;
-
-	case 'o':
-	  out_file = optarg;
-	  break;
-
-	case 's':
-	  suppress_common_flag = 1;
-	  break;
-
-	case 't':
-	  diffarg ("-t");
-	  break;
-
-	case 'v':
-	  printf ("sdiff - GNU diffutils version %s\n", version_string);
-	  exit (0);
-
-	case 'w':
-	  diffarg ("-W");
-	  diffarg (optarg);
-	  break;
-
-	case 'W':
-	  diffarg ("-w");
-	  break;
-
-	case 129:
-	  usage ();
-	  if (ferror (stdout) || fclose (stdout) != 0)
-	    fatal ("write error");
-	  exit (0);
-
-	default:
-	  try_help (0);
-	}
-    }
-
-  if (argc - optind != 2)
-    try_help (argc - optind < 2 ? "missing operand" : "extra operand");
-
-  if (! out_file)
-    {
-      /* easy case: diff does everything for us */
-      if (suppress_common_flag)
-	diffarg ("--suppress-common-lines");
-      diffarg ("-y");
-      diffarg ("--");
-      diffarg (argv[optind]);
-      diffarg (argv[optind + 1]);
-      diffarg (0);
-      execdiff ();
-    }
-  else
-    {
-      FILE *left, *right, *out, *diffout;
-      int interact_ok;
-      struct line_filter lfilt;
-      struct line_filter rfilt;
-      struct line_filter diff_filt;
-      int leftdir = diraccess (argv[optind]);
-      int rightdir = diraccess (argv[optind + 1]);
-
-      if (leftdir && rightdir)
-	fatal ("both files to be compared are directories");
-
-      left = ck_fopen (expand_name (argv[optind], leftdir, argv[optind + 1]), "r");
-      ;
-      right = ck_fopen (expand_name (argv[optind + 1], rightdir, argv[optind]), "r");
-      out = ck_fopen (out_file, "w");
-
-      diffarg ("--sdiff-merge-assist");
-      diffarg ("--");
-      diffarg (argv[optind]);
-      diffarg (argv[optind + 1]);
-      diffarg (0);
-
-      trapsigs ();
-
-#if ! HAVE_FORK
-      {
-	size_t cmdsize = 1;
-	char *p, *command;
-	int i;
-
-	for (i = 0;  diffargv[i];  i++)
-	  cmdsize += 4 * strlen (diffargv[i]) + 3;
-	command = p = xmalloc (cmdsize);
-	for (i = 0;  diffargv[i];  i++)
-	  {
-	    char const *a = diffargv[i];
-	    SYSTEM_QUOTE_ARG (p, a);
-	    *p++ = ' ';
-	  }
-	p[-1] = '\0';
-	diffout = popen (command, "r");
-	if (!diffout)
-	  perror_fatal (command);
-	free (command);
-      }
-#else /* HAVE_FORK */
-      {
-	int diff_fds[2];
-
-	if (pipe (diff_fds) != 0)
-	  perror_fatal ("pipe");
-
-	diffpid = vfork ();
-	if (diffpid < 0)
-	  perror_fatal ("fork failed");
-	if (!diffpid)
-	  {
-	    signal (SIGINT, SIG_IGN);  /* in case user interrupts editor */
-	    signal (SIGPIPE, SIG_DFL);
-
-	    close (diff_fds[0]);
-	    if (diff_fds[1] != STDOUT_FILENO)
-	      {
-		dup2 (diff_fds[1], STDOUT_FILENO);
-		close (diff_fds[1]);
-	      }
-
-	    execdiff ();
-	  }
-
-	close (diff_fds[1]);
-	diffout = fdopen (diff_fds[0], "r");
-	if (!diffout)
-	  perror_fatal ("fdopen");
-      }
-#endif /* HAVE_FORK */
-
-      lf_init (&diff_filt, diffout);
-      lf_init (&lfilt, left);
-      lf_init (&rfilt, right);
-
-      interact_ok = interact (&diff_filt, &lfilt, &rfilt, out);
-
-      ck_fclose (left);
-      ck_fclose (right);
-      ck_fclose (out);
-
-      {
-	int wstatus;
-
-#if ! HAVE_FORK
-	wstatus = pclose (diffout);
-#else
-	ck_fclose (diffout);
-	while (waitpid (diffpid, &wstatus, 0) < 0)
-	  if (errno == EINTR)
-	    checksigs ();
-	  else
-	    perror_fatal ("wait failed");
-	diffpid = 0;
-#endif
-
-	if (tmpmade)
-	  {
-	    unlink (tmpname);
-	    tmpmade = 0;
-	  }
-
-	if (! interact_ok)
-	  exiterr ();
-
-	if (! (WIFEXITED (wstatus) && WEXITSTATUS (wstatus) < 2))
-	  fatal ("Subsidiary diff failed");
-
-	untrapsig (0);
-	checksigs ();
-	exit (WEXITSTATUS (wstatus));
-      }
-    }
-  return 0;			/* Fool -Wall . . . */
-}
-
-static void
-diffarg (a)
-     char const *a;
-{
-  static unsigned diffargs, diffargsmax;
-
-  if (diffargs == diffargsmax)
-    {
-      if (! diffargsmax)
-	{
-	  diffargv = (char const **) xmalloc (sizeof (char));
-	  diffargsmax = 8;
-	}
-      diffargsmax *= 2;
-      diffargv = (char const **) realloc (diffargv,
-					  diffargsmax * sizeof (char const *));
-      if (! diffargv)
-	fatal ("out of memory");
-    }
-  diffargv[diffargs++] = a;
-}
-
-static void
-execdiff ()
-{
-  execvp (diffbin, (char **) diffargv);
-  write (STDERR_FILENO, diffbin, strlen (diffbin));
-  write (STDERR_FILENO, ": not found\n", 12);
-  _exit (2);
-}
-
-
-
-
-/* Signal handling */
-
-#define NUM_SIGS (sizeof (sigs) / sizeof (*sigs))
-static int const sigs[] = {
-#ifdef SIGHUP
-       SIGHUP,
-#endif
-#ifdef SIGQUIT
-       SIGQUIT,
-#endif
-#ifdef SIGTERM
-       SIGTERM,
-#endif
-#ifdef SIGXCPU
-       SIGXCPU,
-#endif
-#ifdef SIGXFSZ
-       SIGXFSZ,
-#endif
-       SIGINT,
-       SIGPIPE
-};
-
-/* Prefer `sigaction' if it is available, since `signal' can lose signals.  */
-#if HAVE_SIGACTION
-static struct sigaction initial_action[NUM_SIGS];
-#define initial_handler(i) (initial_action[i].sa_handler)
-#else
-static RETSIGTYPE (*initial_action[NUM_SIGS]) ();
-#define initial_handler(i) (initial_action[i])
-#endif
-
-static int volatile ignore_SIGINT;
-static int volatile signal_received;
-static int sigs_trapped;
-
-static RETSIGTYPE
-catchsig (s)
-     int s;
-{
-#if ! HAVE_SIGACTION
-  signal (s, SIG_IGN);
-#endif
-  if (! (s == SIGINT && ignore_SIGINT))
-    signal_received = s;
-}
-
-static void
-trapsigs ()
-{
-  int i;
-
-#if HAVE_SIGACTION
-  struct sigaction catchaction;
-  bzero (&catchaction, sizeof (catchaction));
-  catchaction.sa_handler = catchsig;
-#ifdef SA_INTERRUPT
-  /* Non-Posix BSD-style systems like SunOS 4.1.x need this
-     so that `read' calls are interrupted properly.  */
-  catchaction.sa_flags = SA_INTERRUPT;
-#endif
-  sigemptyset (&catchaction.sa_mask);
-  for (i = 0;  i < NUM_SIGS;  i++)
-    sigaddset (&catchaction.sa_mask, sigs[i]);
-  for (i = 0;  i < NUM_SIGS;  i++)
-    {
-      sigaction (sigs[i], 0, &initial_action[i]);
-      if (initial_handler (i) != SIG_IGN
-	  && sigaction (sigs[i], &catchaction, 0) != 0)
-	fatal ("signal error");
-    }
-#else /* ! HAVE_SIGACTION */
-  for (i = 0;  i < NUM_SIGS;  i++)
-    {
-      initial_action[i] = signal (sigs[i], SIG_IGN);
-      if (initial_handler (i) != SIG_IGN
-	  && signal (sigs[i], catchsig) != SIG_IGN)
-	fatal ("signal error");
-    }
-#endif /* ! HAVE_SIGACTION */
-
-#if !defined(SIGCHLD) && defined(SIGCLD)
-#define SIGCHLD SIGCLD
-#endif
-#ifdef SIGCHLD
-  /* System V fork+wait does not work if SIGCHLD is ignored.  */
-  signal (SIGCHLD, SIG_DFL);
-#endif
-
-  sigs_trapped = 1;
-}
-
-/* Untrap signal S, or all trapped signals if S is zero.  */
-static void
-untrapsig (s)
-     int s;
-{
-  int i;
-
-  if (sigs_trapped)
-    for (i = 0;  i < NUM_SIGS;  i++)
-      if ((!s || sigs[i] == s)  &&  initial_handler (i) != SIG_IGN)
-#if HAVE_SIGACTION
-	  sigaction (sigs[i], &initial_action[i], 0);
-#else
-	  signal (sigs[i], initial_action[i]);
-#endif
-}
-
-/* Exit if a signal has been received.  */
-static void
-checksigs ()
-{
-  int s = signal_received;
-  if (s)
-    {
-      cleanup ();
-
-      /* Yield an exit status indicating that a signal was received.  */
-      untrapsig (s);
-      kill (getpid (), s);
-
-      /* That didn't work, so exit with error status.  */
-      exit (2);
-    }
-}
-
-
-
-static void
-give_help ()
-{
-  fprintf (stderr,"l:\tuse the left version\n");
-  fprintf (stderr,"r:\tuse the right version\n");
-  fprintf (stderr,"e l:\tedit then use the left version\n");
-  fprintf (stderr,"e r:\tedit then use the right version\n");
-  fprintf (stderr,"e b:\tedit then use the left and right versions concatenated\n");
-  fprintf (stderr,"e:\tedit a new version\n");
-  fprintf (stderr,"s:\tsilently include common lines\n");
-  fprintf (stderr,"v:\tverbosely include common lines\n");
-  fprintf (stderr,"q:\tquit\n");
-}
-
-static int
-skip_white ()
-{
-  int c;
-  for (;;)
-    {
-      c = getchar ();
-      if (!ISSPACE (c) || c == '\n')
-	break;
-      checksigs ();
-    }
-  if (ferror (stdin))
-    perror_fatal ("input error");
-  return c;
-}
-
-static void
-flush_line ()
-{
-  int c;
-  while ((c = getchar ()) != '\n' && c != EOF)
-    ;
-  if (ferror (stdin))
-    perror_fatal ("input error");
-}
-
-
-/* interpret an edit command */
-static int
-edit (left, lenl, right, lenr, outfile)
-     struct line_filter *left;
-     int lenl;
-     struct line_filter *right;
-     int lenr;
-     FILE *outfile;
-{
-  for (;;)
-    {
-      int cmd0, cmd1;
-      int gotcmd = 0;
-
-      cmd1 = 0; /* Pacify `gcc -W'.  */
-
-      while (!gotcmd)
-	{
-	  if (putchar ('%') != '%')
-	    perror_fatal ("output error");
-	  ck_fflush (stdout);
-
-	  cmd0 = skip_white ();
-	  switch (cmd0)
-	    {
-	    case 'l': case 'r': case 's': case 'v': case 'q':
-	      if (skip_white () != '\n')
-		{
-		  give_help ();
-		  flush_line ();
-		  continue;
-		}
-	      gotcmd = 1;
-	      break;
-
-	    case 'e':
-	      cmd1 = skip_white ();
-	      switch (cmd1)
-		{
-		case 'l': case 'r': case 'b':
-		  if (skip_white () != '\n')
-		    {
-		      give_help ();
-		      flush_line ();
-		      continue;
-		    }
-		  gotcmd = 1;
-		  break;
-		case '\n':
-		  gotcmd = 1;
-		  break;
-		default:
-		  give_help ();
-		  flush_line ();
-		  continue;
-		}
-	      break;
-	    case EOF:
-	      if (feof (stdin))
-		{
-		  gotcmd = 1;
-		  cmd0 = 'q';
-		  break;
-		}
-	      /* falls through */
-	    default:
-	      flush_line ();
-	      /* falls through */
-	    case '\n':
-	      give_help ();
-	      continue;
-	    }
-	}
-
-      switch (cmd0)
-	{
-	case 'l':
-	  lf_copy (left, lenl, outfile);
-	  lf_skip (right, lenr);
-	  return 1;
-	case 'r':
-	  lf_copy (right, lenr, outfile);
-	  lf_skip (left, lenl);
-	  return 1;
-	case 's':
-	  suppress_common_flag = 1;
-	  break;
-	case 'v':
-	  suppress_common_flag = 0;
-	  break;
-	case 'q':
-	  return 0;
-	case 'e':
-	  {
-	    int tfd;
-	    FILE *tmp;
-
-	    if (tmpmade)
-	      {
-	        unlink (tmpname);
-	        tmpmade = 0;
-		free (tmpname);
-	      }
-
-	    asprintf (&tmpname, "%s/sdiff.XXXXXX",
-	      getenv("TMPDIR") ?: P_tmpdir);
-	    if (tmpname == NULL)
-	      perror_fatal ("temporary file name");
-	    tfd = mkstemp(tmpname);
-	    if (tfd == -1)
-	      perror_fatal ("temporary file name");
-	    tmp = fdopen (tfd, "w+");
-	    if (tmp == NULL)
-	      perror_fatal ("temporary file name");
- 
-	    tmpmade = 1;
-
-	    if (cmd1 == 'l' || cmd1 == 'b')
-	      lf_copy (left, lenl, tmp);
-	    else
-	      lf_skip (left, lenl);
-
-	    if (cmd1 == 'r' || cmd1 == 'b')
-	      lf_copy (right, lenr, tmp);
-	    else
-	      lf_skip (right, lenr);
-
-	    ck_fflush (tmp);
-
-	    {
-	      int wstatus;
-#if ! HAVE_FORK
-	      char *command = xmalloc (strlen (edbin) + strlen (tmpname) + 2);
-	      sprintf (command, "%s %s", edbin, tmpname);
-	      wstatus = system (command);
-	      free (command);
-#else /* HAVE_FORK */
-	      pid_t pid;
-
-	      ignore_SIGINT = 1;
-	      checksigs ();
-
-	      pid = vfork ();
-	      if (pid == 0)
-		{
-		  char const *argv[3];
-		  int i = 0;
-
-		  argv[i++] = edbin;
-		  argv[i++] = tmpname;
-		  argv[i++] = 0;
-
-		  execvp (edbin, (char **) argv);
-		  write (STDERR_FILENO, edbin, strlen (edbin));
-		  write (STDERR_FILENO, ": not found\n", 12);
-		  _exit (1);
-		}
-
-	      if (pid < 0)
-		perror_fatal ("fork failed");
-
-	      while (waitpid (pid, &wstatus, 0) < 0)
-		if (errno == EINTR)
-		  checksigs ();
-		else
-		  perror_fatal ("wait failed");
-
-	      ignore_SIGINT = 0;
-#endif /* HAVE_FORK */
-
-	      if (wstatus != 0)
-		fatal ("Subsidiary editor failed");
-	    }
-
-	    if (fseek (tmp, 0L, SEEK_SET) != 0)
-	      perror_fatal ("fseek");
-	    {
-	      /* SDIFF_BUFSIZE is too big for a local var
-		 in some compilers, so we allocate it dynamically.  */
-	      char *buf = xmalloc (SDIFF_BUFSIZE);
-	      size_t size;
-
-	      while ((size = ck_fread (buf, SDIFF_BUFSIZE, tmp)) != 0)
-		{
-		  checksigs ();
-		  ck_fwrite (buf, size, outfile);
-		}
-	      ck_fclose (tmp);
-
-	      free (buf);
-	    }
-	    return 1;
-	  }
-	default:
-	  give_help ();
-	  break;
-	}
-    }
-}
-
-
-
-/* Alternately reveal bursts of diff output and handle user commands.  */
-static int
-interact (diff, left, right, outfile)
-     struct line_filter *diff;
-     struct line_filter *left;
-     struct line_filter *right;
-     FILE *outfile;
-{
-  for (;;)
-    {
-      char diff_help[256];
-      int snarfed = lf_snarf (diff, diff_help, sizeof (diff_help));
-
-      if (snarfed <= 0)
-	return snarfed;
-
-      checksigs ();
-
-      switch (diff_help[0])
-	{
-	case ' ':
-	  puts (diff_help + 1);
-	  break;
-	case 'i':
-	  {
-	    int lenl = atoi (diff_help + 1), lenr, lenmax;
-	    char *p = strchr (diff_help, ',');
-
-	    if (!p)
-	      fatal (diff_help);
-	    lenr = atoi (p + 1);
-	    lenmax = max (lenl, lenr);
-
-	    if (suppress_common_flag)
-	      lf_skip (diff, lenmax);
-	    else
-	      lf_copy (diff, lenmax, stdout);
-
-	    lf_copy (left, lenl, outfile);
-	    lf_skip (right, lenr);
-	    break;
-	  }
-	case 'c':
-	  {
-	    int lenl = atoi (diff_help + 1), lenr;
-	    char *p = strchr (diff_help, ',');
-
-	    if (!p)
-	      fatal (diff_help);
-	    lenr = atoi (p + 1);
-	    lf_copy (diff, max (lenl, lenr), stdout);
-	    if (! edit (left, lenl, right, lenr, outfile))
-	      return 0;
-	    break;
-	  }
-	default:
-	  fatal (diff_help);
-	  break;
-	}
-    }
-}
-
-
-
-/* temporary lossage: this is torn from gnu libc */
-/* Return nonzero if DIR is an existing directory.  */
-static int
-diraccess (dir)
-     char const *dir;
-{
-  struct stat buf;
-  return stat (dir, &buf) == 0 && S_ISDIR (buf.st_mode);
-}
diff --git a/contrib/diff/util.c b/contrib/diff/util.c
deleted file mode 100644
index 35b28eae7f40..000000000000
--- a/contrib/diff/util.c
+++ /dev/null
@@ -1,759 +0,0 @@
-/* Support routines for GNU DIFF.
-   Copyright (C) 1988, 1989, 1992, 1993, 1994 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 GNU DIFF; see the file COPYING.  If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
-
-/* $FreeBSD$ */
-
-#include "diff.h"
-
-#ifndef PR_PROGRAM
-#define PR_PROGRAM "/bin/pr"
-#endif
-
-/* Queue up one-line messages to be printed at the end,
-   when -l is specified.  Each message is recorded with a `struct msg'.  */
-
-struct msg
-{
-  struct msg *next;
-  char const *format;
-  char const *arg1;
-  char const *arg2;
-  char const *arg3;
-  char const *arg4;
-};
-
-/* Head of the chain of queues messages.  */
-
-static struct msg *msg_chain;
-
-/* Tail of the chain of queues messages.  */
-
-static struct msg **msg_chain_end = &msg_chain;
-
-/* Use when a system call returns non-zero status.
-   TEXT should normally be the file name.  */
-
-void
-perror_with_name (text)
-     char const *text;
-{
-  int e = errno;
-  fprintf (stderr, "%s: ", program_name);
-  errno = e;
-  perror (text);
-}
-
-/* Use when a system call returns non-zero status and that is fatal.  */
-
-void
-pfatal_with_name (text)
-     char const *text;
-{
-  int e = errno;
-  print_message_queue ();
-  fprintf (stderr, "%s: ", program_name);
-  errno = e;
-  perror (text);
-  exit (2);
-}
-
-/* Print an error message from the format-string FORMAT
-   with args ARG1 and ARG2.  */
-
-void
-error (format, arg, arg1)
-     char const *format, *arg, *arg1;
-{
-  fprintf (stderr, "%s: ", program_name);
-  fprintf (stderr, format, arg, arg1);
-  fprintf (stderr, "\n");
-}
-
-/* Print an error message containing the string TEXT, then exit.  */
-
-void
-fatal (m)
-     char const *m;
-{
-  print_message_queue ();
-  error ("%s", m, 0);
-  exit (2);
-}
-
-/* Like printf, except if -l in effect then save the message and print later.
-   This is used for things like "binary files differ" and "Only in ...".  */
-
-void
-message (format, arg1, arg2)
-     char const *format, *arg1, *arg2;
-{
-  message5 (format, arg1, arg2, 0, 0);
-}
-
-void
-message5 (format, arg1, arg2, arg3, arg4)
-     char const *format, *arg1, *arg2, *arg3, *arg4;
-{
-  if (paginate_flag)
-    {
-      struct msg *new = (struct msg *) xmalloc (sizeof (struct msg));
-      new->format = format;
-      new->arg1 = concat (arg1, "", "");
-      new->arg2 = concat (arg2, "", "");
-      new->arg3 = arg3 ? concat (arg3, "", "") : 0;
-      new->arg4 = arg4 ? concat (arg4, "", "") : 0;
-      new->next = 0;
-      *msg_chain_end = new;
-      msg_chain_end = &new->next;
-    }
-  else
-    {
-      if (sdiff_help_sdiff)
-	putchar (' ');
-      printf (format, arg1, arg2, arg3, arg4);
-    }
-}
-
-/* Output all the messages that were saved up by calls to `message'.  */
-
-void
-print_message_queue ()
-{
-  struct msg *m;
-
-  for (m = msg_chain; m; m = m->next)
-    printf (m->format, m->arg1, m->arg2, m->arg3, m->arg4);
-}
-
-/* Call before outputting the results of comparing files NAME0 and NAME1
-   to set up OUTFILE, the stdio stream for the output to go to.
-
-   Usually, OUTFILE is just stdout.  But when -l was specified
-   we fork off a `pr' and make OUTFILE a pipe to it.
-   `pr' then outputs to our stdout.  */
-
-static char const *current_name0;
-static char const *current_name1;
-static int current_depth;
-
-void
-setup_output (name0, name1, depth)
-     char const *name0, *name1;
-     int depth;
-{
-  current_name0 = name0;
-  current_name1 = name1;
-  current_depth = depth;
-  outfile = 0;
-}
-
-#if HAVE_FORK
-static pid_t pr_pid;
-#endif
-
-void
-begin_output ()
-{
-  char *name;
-
-  if (outfile != 0)
-    return;
-
-  /* Construct the header of this piece of diff.  */
-  name = xmalloc (strlen (current_name0) + strlen (current_name1)
-		  + strlen (switch_string) + 7);
-  /* Posix.2 section 4.17.6.1.1 specifies this format.  But there is a
-     bug in the first printing (IEEE Std 1003.2-1992 p 251 l 3304):
-     it says that we must print only the last component of the pathnames.
-     This requirement is silly and does not match historical practice.  */
-  sprintf (name, "diff%s %s %s", switch_string, current_name0, current_name1);
-
-  if (paginate_flag)
-    {
-      /* Make OUTFILE a pipe to a subsidiary `pr'.  */
-
-#if HAVE_FORK
-      int pipes[2];
-
-      if (pipe (pipes) != 0)
-	pfatal_with_name ("pipe");
-
-      fflush (stdout);
-
-      pr_pid = vfork ();
-      if (pr_pid < 0)
-	pfatal_with_name ("vfork");
-
-      if (pr_pid == 0)
-	{
-	  close (pipes[1]);
-	  if (pipes[0] != STDIN_FILENO)
-	    {
-	      if (dup2 (pipes[0], STDIN_FILENO) < 0)
-		pfatal_with_name ("dup2");
-	      close (pipes[0]);
-	    }
-#ifdef __FreeBSD__
-	  execl (PR_PROGRAM, PR_PROGRAM, "-F", "-h", name, (char *)NULL);
-#else
-	  execl (PR_PROGRAM, PR_PROGRAM, "-f", "-h", name, (char *)NULL);
-#endif
-	  pfatal_with_name (PR_PROGRAM);
-	}
-      else
-	{
-	  close (pipes[0]);
-	  outfile = fdopen (pipes[1], "w");
-	  if (!outfile)
-	    pfatal_with_name ("fdopen");
-	}
-#else /* ! HAVE_FORK */
-      char *command = xmalloc (4 * strlen (name) + strlen (PR_PROGRAM) + 10);
-      char *p;
-      char const *a = name;
-      sprintf (command, "%s -f -h ", PR_PROGRAM);
-      p = command + strlen (command);
-      SYSTEM_QUOTE_ARG (p, a);
-      *p = 0;
-      outfile = popen (command, "w");
-      if (!outfile)
-	pfatal_with_name (command);
-      free (command);
-#endif /* ! HAVE_FORK */
-    }
-  else
-    {
-
-      /* If -l was not specified, output the diff straight to `stdout'.  */
-
-      outfile = stdout;
-
-      /* If handling multiple files (because scanning a directory),
-	 print which files the following output is about.  */
-      if (current_depth > 0)
-	printf ("%s\n", name);
-    }
-
-  free (name);
-
-  /* A special header is needed at the beginning of context output.  */
-  switch (output_style)
-    {
-    case OUTPUT_CONTEXT:
-      print_context_header (files, 0);
-      break;
-
-    case OUTPUT_UNIFIED:
-      print_context_header (files, 1);
-      break;
-
-    default:
-      break;
-    }
-}
-
-/* Call after the end of output of diffs for one file.
-   Close OUTFILE and get rid of the `pr' subfork.  */
-
-void
-finish_output ()
-{
-  if (outfile != 0 && outfile != stdout)
-    {
-      int wstatus;
-      if (ferror (outfile))
-	fatal ("write error");
-#if ! HAVE_FORK
-      wstatus = pclose (outfile);
-#else /* HAVE_FORK */
-      if (fclose (outfile) != 0)
-	pfatal_with_name ("write error");
-      if (waitpid (pr_pid, &wstatus, 0) < 0)
-	pfatal_with_name ("waitpid");
-#endif /* HAVE_FORK */
-      if (wstatus != 0)
-	fatal ("subsidiary pr failed");
-    }
-
-  outfile = 0;
-}
-
-/* Compare two lines (typically one from each input file)
-   according to the command line options.
-   For efficiency, this is invoked only when the lines do not match exactly
-   but an option like -i might cause us to ignore the difference.
-   Return nonzero if the lines differ.  */
-
-int
-line_cmp (s1, s2)
-     char const *s1, *s2;
-{
-  register unsigned char const *t1 = (unsigned char const *) s1;
-  register unsigned char const *t2 = (unsigned char const *) s2;
-
-  while (1)
-    {
-      register unsigned char c1 = *t1++;
-      register unsigned char c2 = *t2++;
-
-      /* Test for exact char equality first, since it's a common case.  */
-      if (c1 != c2)
-	{
-	  /* Ignore horizontal white space if -b or -w is specified.  */
-
-	  if (ignore_all_space_flag)
-	    {
-	      /* For -w, just skip past any white space.  */
-	      while (ISSPACE (c1) && c1 != '\n') c1 = *t1++;
-	      while (ISSPACE (c2) && c2 != '\n') c2 = *t2++;
-	    }
-	  else if (ignore_space_change_flag)
-	    {
-	      /* For -b, advance past any sequence of white space in line 1
-		 and consider it just one Space, or nothing at all
-		 if it is at the end of the line.  */
-	      if (ISSPACE (c1))
-		{
-		  while (c1 != '\n')
-		    {
-		      c1 = *t1++;
-		      if (! ISSPACE (c1))
-			{
-			  --t1;
-			  c1 = ' ';
-			  break;
-			}
-		    }
-		}
-
-	      /* Likewise for line 2.  */
-	      if (ISSPACE (c2))
-		{
-		  while (c2 != '\n')
-		    {
-		      c2 = *t2++;
-		      if (! ISSPACE (c2))
-			{
-			  --t2;
-			  c2 = ' ';
-			  break;
-			}
-		    }
-		}
-
-	      if (c1 != c2)
-		{
-		  /* If we went too far when doing the simple test
-		     for equality, go back to the first non-white-space
-		     character in both sides and try again.  */
-		  if (c2 == ' ' && c1 != '\n'
-		      && (unsigned char const *) s1 + 1 < t1
-		      && ISSPACE(t1[-2]))
-		    {
-		      --t1;
-		      continue;
-		    }
-		  if (c1 == ' ' && c2 != '\n'
-		      && (unsigned char const *) s2 + 1 < t2
-		      && ISSPACE(t2[-2]))
-		    {
-		      --t2;
-		      continue;
-		    }
-		}
-	    }
-
-	  /* Lowercase all letters if -i is specified.  */
-
-	  if (ignore_case_flag)
-	    {
-	      if (ISUPPER (c1))
-		c1 = tolower (c1);
-	      if (ISUPPER (c2))
-		c2 = tolower (c2);
-	    }
-
-	  if (c1 != c2)
-	    break;
-	}
-      if (c1 == '\n')
-	return 0;
-    }
-
-  return (1);
-}
-
-/* Find the consecutive changes at the start of the script START.
-   Return the last link before the first gap.  */
-
-struct change *
-find_change (start)
-     struct change *start;
-{
-  return start;
-}
-
-struct change *
-find_reverse_change (start)
-     struct change *start;
-{
-  return start;
-}
-
-/* Divide SCRIPT into pieces by calling HUNKFUN and
-   print each piece with PRINTFUN.
-   Both functions take one arg, an edit script.
-
-   HUNKFUN is called with the tail of the script
-   and returns the last link that belongs together with the start
-   of the tail.
-
-   PRINTFUN takes a subscript which belongs together (with a null
-   link at the end) and prints it.  */
-
-void
-print_script (script, hunkfun, printfun)
-     struct change *script;
-     struct change * (*hunkfun) PARAMS((struct change *));
-     void (*printfun) PARAMS((struct change *));
-{
-  struct change *next = script;
-
-  while (next)
-    {
-      struct change *this, *end;
-
-      /* Find a set of changes that belong together.  */
-      this = next;
-      end = (*hunkfun) (next);
-
-      /* Disconnect them from the rest of the changes,
-	 making them a hunk, and remember the rest for next iteration.  */
-      next = end->link;
-      end->link = 0;
-#ifdef DEBUG
-      debug_script (this);
-#endif
-
-      /* Print this hunk.  */
-      (*printfun) (this);
-
-      /* Reconnect the script so it will all be freed properly.  */
-      end->link = next;
-    }
-}
-
-/* Print the text of a single line LINE,
-   flagging it with the characters in LINE_FLAG (which say whether
-   the line is inserted, deleted, changed, etc.).  */
-
-void
-print_1_line (line_flag, line)
-     char const *line_flag;
-     char const * const *line;
-{
-  char const *text = line[0], *limit = line[1]; /* Help the compiler.  */
-  FILE *out = outfile; /* Help the compiler some more.  */
-  char const *flag_format = 0;
-
-  /* If -T was specified, use a Tab between the line-flag and the text.
-     Otherwise use a Space (as Unix diff does).
-     Print neither space nor tab if line-flags are empty.  */
-
-  if (line_flag && *line_flag)
-    {
-      flag_format = tab_align_flag ? "%s\t" : "%s ";
-      fprintf (out, flag_format, line_flag);
-    }
-
-  output_1_line (text, limit, flag_format, line_flag);
-
-  if ((!line_flag || line_flag[0]) && limit[-1] != '\n')
-    fprintf (out, "\n\\ No newline at end of file\n");
-}
-
-/* Output a line from TEXT up to LIMIT.  Without -t, output verbatim.
-   With -t, expand white space characters to spaces, and if FLAG_FORMAT
-   is nonzero, output it with argument LINE_FLAG after every
-   internal carriage return, so that tab stops continue to line up.  */
-
-void
-output_1_line (text, limit, flag_format, line_flag)
-     char const *text, *limit, *flag_format, *line_flag;
-{
-  if (!tab_expand_flag)
-    fwrite (text, sizeof (char), limit - text, outfile);
-  else
-    {
-      register FILE *out = outfile;
-      register unsigned char c;
-      register char const *t = text;
-      register unsigned column = 0;
-
-      while (t < limit)
-	switch ((c = *t++))
-	  {
-	  case '\t':
-	    {
-	      unsigned spaces = TAB_WIDTH - column % TAB_WIDTH;
-	      column += spaces;
-	      do
-		putc (' ', out);
-	      while (--spaces);
-	    }
-	    break;
-
-	  case '\r':
-	    putc (c, out);
-	    if (flag_format && t < limit && *t != '\n')
-	      fprintf (out, flag_format, line_flag);
-	    column = 0;
-	    break;
-
-	  case '\b':
-	    if (column == 0)
-	      continue;
-	    column--;
-	    putc (c, out);
-	    break;
-
-	  default:
-	    if (ISPRINT (c))
-	      column++;
-	    putc (c, out);
-	    break;
-	  }
-    }
-}
-
-int
-change_letter (inserts, deletes)
-     int inserts, deletes;
-{
-  if (!inserts)
-    return 'd';
-  else if (!deletes)
-    return 'a';
-  else
-    return 'c';
-}
-
-/* Translate an internal line number (an index into diff's table of lines)
-   into an actual line number in the input file.
-   The internal line number is LNUM.  FILE points to the data on the file.
-
-   Internal line numbers count from 0 starting after the prefix.
-   Actual line numbers count from 1 within the entire file.  */
-
-int
-translate_line_number (file, lnum)
-     struct file_data const *file;
-     int lnum;
-{
-  return lnum + file->prefix_lines + 1;
-}
-
-void
-translate_range (file, a, b, aptr, bptr)
-     struct file_data const *file;
-     int a, b;
-     int *aptr, *bptr;
-{
-  *aptr = translate_line_number (file, a - 1) + 1;
-  *bptr = translate_line_number (file, b + 1) - 1;
-}
-
-/* Print a pair of line numbers with SEPCHAR, translated for file FILE.
-   If the two numbers are identical, print just one number.
-
-   Args A and B are internal line numbers.
-   We print the translated (real) line numbers.  */
-
-void
-print_number_range (sepchar, file, a, b)
-     int sepchar;
-     struct file_data *file;
-     int a, b;
-{
-  int trans_a, trans_b;
-  translate_range (file, a, b, &trans_a, &trans_b);
-
-  /* Note: we can have B < A in the case of a range of no lines.
-     In this case, we should print the line number before the range,
-     which is B.  */
-  if (trans_b > trans_a)
-    fprintf (outfile, "%d%c%d", trans_a, sepchar, trans_b);
-  else
-    fprintf (outfile, "%d", trans_b);
-}
-
-/* Look at a hunk of edit script and report the range of lines in each file
-   that it applies to.  HUNK is the start of the hunk, which is a chain
-   of `struct change'.  The first and last line numbers of file 0 are stored in
-   *FIRST0 and *LAST0, and likewise for file 1 in *FIRST1 and *LAST1.
-   Note that these are internal line numbers that count from 0.
-
-   If no lines from file 0 are deleted, then FIRST0 is LAST0+1.
-
-   Also set *DELETES nonzero if any lines of file 0 are deleted
-   and set *INSERTS nonzero if any lines of file 1 are inserted.
-   If only ignorable lines are inserted or deleted, both are
-   set to 0.  */
-
-void
-analyze_hunk (hunk, first0, last0, first1, last1, deletes, inserts)
-     struct change *hunk;
-     int *first0, *last0, *first1, *last1;
-     int *deletes, *inserts;
-{
-  int l0, l1, show_from, show_to;
-  int i;
-  int trivial = ignore_blank_lines_flag || ignore_regexp_list;
-  struct change *next;
-
-  show_from = show_to = 0;
-
-  *first0 = hunk->line0;
-  *first1 = hunk->line1;
-
-  next = hunk;
-  do
-    {
-      l0 = next->line0 + next->deleted - 1;
-      l1 = next->line1 + next->inserted - 1;
-      show_from += next->deleted;
-      show_to += next->inserted;
-
-      for (i = next->line0; i <= l0 && trivial; i++)
-	if (!ignore_blank_lines_flag || files[0].linbuf[i][0] != '\n')
-	  {
-	    struct regexp_list *r;
-	    char const *line = files[0].linbuf[i];
-	    int len = files[0].linbuf[i + 1] - line;
-
-	    for (r = ignore_regexp_list; r; r = r->next)
-	      if (0 <= re_search (&r->buf, line, len, 0, len, 0))
-		break;	/* Found a match.  Ignore this line.  */
-	    /* If we got all the way through the regexp list without
-	       finding a match, then it's nontrivial.  */
-	    if (!r)
-	      trivial = 0;
-	  }
-
-      for (i = next->line1; i <= l1 && trivial; i++)
-	if (!ignore_blank_lines_flag || files[1].linbuf[i][0] != '\n')
-	  {
-	    struct regexp_list *r;
-	    char const *line = files[1].linbuf[i];
-	    int len = files[1].linbuf[i + 1] - line;
-
-	    for (r = ignore_regexp_list; r; r = r->next)
-	      if (0 <= re_search (&r->buf, line, len, 0, len, 0))
-		break;	/* Found a match.  Ignore this line.  */
-	    /* If we got all the way through the regexp list without
-	       finding a match, then it's nontrivial.  */
-	    if (!r)
-	      trivial = 0;
-	  }
-    }
-  while ((next = next->link) != 0);
-
-  *last0 = l0;
-  *last1 = l1;
-
-  /* If all inserted or deleted lines are ignorable,
-     tell the caller to ignore this hunk.  */
-
-  if (trivial)
-    show_from = show_to = 0;
-
-  *deletes = show_from;
-  *inserts = show_to;
-}
-
-/* malloc a block of memory, with fatal error message if we can't do it. */
-
-VOID *
-xmalloc (size)
-     size_t size;
-{
-  register VOID *value;
-
-  if (size == 0)
-    size = 1;
-
-  value = (VOID *) malloc (size);
-
-  if (!value)
-    fatal ("memory exhausted");
-  return value;
-}
-
-/* realloc a block of memory, with fatal error message if we can't do it. */
-
-VOID *
-xrealloc (old, size)
-     VOID *old;
-     size_t size;
-{
-  register VOID *value;
-
-  if (size == 0)
-    size = 1;
-
-  value = (VOID *) realloc (old, size);
-
-  if (!value)
-    fatal ("memory exhausted");
-  return value;
-}
-
-/* Concatenate three strings, returning a newly malloc'd string.  */
-
-char *
-concat (s1, s2, s3)
-     char const *s1, *s2, *s3;
-{
-  size_t len = strlen (s1) + strlen (s2) + strlen (s3);
-  char *new = xmalloc (len + 1);
-  sprintf (new, "%s%s%s", s1, s2, s3);
-  return new;
-}
-
-/* Yield the newly malloc'd pathname
-   of the file in DIR whose filename is FILE.  */
-
-char *
-dir_file_pathname (dir, file)
-     char const *dir, *file;
-{
-  char const *p = filename_lastdirchar (dir);
-  return concat (dir, "/" + (p && !p[1]), file);
-}
-
-void
-debug_script (sp)
-     struct change *sp;
-{
-  fflush (stdout);
-  for (; sp; sp = sp->link)
-    fprintf (stderr, "%3d %3d delete %d insert %d\n",
-	     sp->line0, sp->line1, sp->deleted, sp->inserted);
-  fflush (stderr);
-}