Initial revision

1 files changed, 0 insertions, 1002 deletions

diff --git a/gdb/source.c b/gdb/source.c
deleted file mode 100644
index ae3a70d..0000000
--- a/gdb/source.c
+++ /dev/null
@@ -1,1002 +0,0 @@
-/* List lines of source files for GDB, the GNU debugger.
-   Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc.
-
-This file is part of GDB.
-
-GDB 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 1, or (at your option)
-any later version.
-
-GDB 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 GDB; see the file COPYING.  If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
-
-#include <stdio.h>
-#include "defs.h"
-#include "symtab.h"
-#include "param.h"
-
-#ifdef USG
-#include <sys/types.h>
-#include <fcntl.h>
-#endif
-
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/file.h>
-
-/* Path of directories to search for source files.
-   Same format as the PATH environment variable's value.  */
-
-static char *source_path;
-
-/* Symtab of default file for listing lines of.  */
-
-struct symtab *current_source_symtab;
-
-/* Default next line to list.  */
-
-int current_source_line;
-
-/* Line number of last line printed.  Default for various commands.
-   current_source_line is usually, but not always, the same as this.  */
-
-static int last_line_listed;
-
-/* First line number listed by last listing command.  */
-
-static int first_line_listed;
-
-
-struct symtab *psymtab_to_symtab ();
-
-/* Set the source file default for the "list" command, specifying a
-   symtab.  Sigh.  Behaivior specification: If it is called with a
-   non-zero argument, that is the symtab to select.  If it is not,
-   first lookup "main"; if it exists, use the symtab and line it
-   defines.  If not, take the last symtab in the symtab_list (if it
-   exists) or the last symtab in the psytab_list (if *it* exists).  If
-   none of this works, report an error.   */
-
-void
-select_source_symtab (s)
-     register struct symtab *s;
-{
-  struct symtabs_and_lines sals;
-  struct symtab_and_line sal;
-  struct partial_symtab *ps, *cs_pst;
-  
-  if (s)
-    {
-      current_source_symtab = s;
-      current_source_line = 1;
-      return;
-    }
-
-  /* Make the default place to list be the function `main'
-     if one exists.  */
-  if (lookup_symbol ("main", 0, VAR_NAMESPACE, 0))
-    {
-      sals = decode_line_spec ("main", 1);
-      sal = sals.sals[0];
-      free (sals.sals);
-      current_source_symtab = sal.symtab;
-      current_source_line = max (sal.line - 9, 1);
-      return;
-    }
-  
-  /* All right; find the last file in the symtab list (ignoring .h's).  */
-
-  if (s = symtab_list)
-    {
-      do
-	{
-	  char *name = s->filename;
-	  int len = strlen (name);
-	  if (! (len > 2 && !strcmp (&name[len - 2], ".h")))
-	    current_source_symtab = s;
-	  s = s->next;
-	}
-      while (s);
-      current_source_line = 1;
-    }
-  else if (partial_symtab_list)
-    {
-      ps = partial_symtab_list;
-      while (ps)
-	{
-	  char *name = ps->filename;
-	  int len = strlen (name);
-	  if (! (len > 2 && !strcmp (&name[len - 2], ".h")))
-	    cs_pst = ps;
-	  ps = ps->next;
-	}
-      if (cs_pst)
-	if (cs_pst->readin)
-	  fatal ("Internal: select_source_symtab: readin pst found and no symtabs.");
-	else
-	  current_source_symtab = psymtab_to_symtab (cs_pst);
-      else
-	current_source_symtab = 0;
-      current_source_line = 1;
-    }
-}
-
-static void
-directories_info ()
-{
-  printf ("Source directories searched: %s\n", source_path);
-}
-
-void
-init_source_path ()
-{
-  register struct symtab *s;
-
-  source_path = savestring (current_directory, strlen (current_directory));
-
-  /* Forget what we learned about line positions in source files;
-     must check again now since files may be found in
-     a different directory now.  */
-  for (s = symtab_list; s; s = s->next)
-    if (s->line_charpos != 0)
-      {
-	free (s->line_charpos);
-	s->line_charpos = 0;
-      }
-}
-
-void
-directory_command (dirname, from_tty)
-     char *dirname;
-     int from_tty;
-{
-  char *old = source_path;
-
-  dont_repeat ();
-
-  if (dirname == 0)
-    {
-      if (query ("Reinitialize source path to %s? ", current_directory))
-	{
-	  init_source_path ();
-	  free (old);
-	}
-    }
-  else
-    {
-      dirname = tilde_expand (dirname);
-      make_cleanup (free, dirname);
-
-      do
-	{
-	  extern char *index ();
-	  char *name = dirname;
-	  register char *p;
-	  struct stat st;
-
-	  {
-	    char *colon = index (name, ':');
-	    char *space = index (name, ' ');
-	    char *tab = index (name, '\t');
-	    if (colon == 0 && space == 0 && tab ==  0)
-	      p = dirname = name + strlen (name);
-	    else
-	      {
-		p = 0;
-		if (colon != 0 && (p == 0 || colon < p))
-		  p = colon;
-		if (space != 0 && (p == 0 || space < p))
-		  p = space;
-		if (tab != 0 && (p == 0 || tab < p))
-		  p = tab;
-		dirname = p + 1;
-		while (*dirname == ':' || *dirname == ' ' || *dirname == '\t')
-		  ++dirname;
-	      }
-	  }
-
-	  if (p[-1] == '/')
-	    /* Sigh. "foo/" => "foo" */
-	    --p;
-	  *p = '\0';
-
-	  while (p[-1] == '.')
-	    {
-	      if (p - name == 1)
-		{
-		  /* "." => getwd ().  */
-		  name = current_directory;
-		  goto append;
-		}
-	      else if (p[-2] == '/')
-		{
-		  if (p - name == 2)
-		    {
-		      /* "/." => "/".  */
-		      *--p = '\0';
-		      goto append;
-		    }
-		  else
-		    {
-		      /* "...foo/." => "...foo".  */
-		      p -= 2;
-		      *p = '\0';
-		      continue;
-		    }
-		}
-	      else
-		break;
-	    }
-
-	  if (*name != '/')
-	    name = concat (current_directory, "/", name);
-	  else
-	    name = savestring (name, p - name);
-	  make_cleanup (free, name);
-
-	  if (stat (name, &st) < 0)
-	    perror_with_name (name);
-	  if ((st.st_mode & S_IFMT) != S_IFDIR)
-	    error ("%s is not a directory.", name);
-
-	append:
-	  {
-	    register unsigned int len = strlen (name);
-
-	    p = source_path;
-	    while (1)
-	      {
-		if (!strncmp (p, name, len)
-		    && (p[len] == '\0' || p[len] == ':'))
-		  {
-		    if (from_tty)
-		      printf ("\"%s\" is already in the source path.\n", name);
-		    break;
-		  }
-		p = index (p, ':');
-		if (p != 0)
-		  ++p;
-		else
-		  break;
-	      }
-	    if (p == 0)
-	      {
-		source_path = concat (old, ":", name);
-		free (old);
-		old = source_path;
-	      }
-	  }
-	} while (*dirname != '\0');
-      if (from_tty)
-	directories_info ();
-    }
-}
-
-/* Open a file named STRING, searching path PATH (dir names sep by colons)
-   using mode MODE and protection bits PROT in the calls to open.
-   If TRY_CWD_FIRST, try to open ./STRING before searching PATH.
-   (ie pretend the first element of PATH is ".")
-   If FILENAMED_OPENED is non-null, set it to a newly allocated string naming
-   the actual file opened (this string will always start with a "/"
-
-   If a file is found, return the descriptor.
-   Otherwise, return -1, with errno set for the last name we tried to open.  */
-
-/*  >>>> This should only allow files of certain types,
-    >>>>  eg executable, non-directory */
-int
-openp (path, try_cwd_first, string, mode, prot, filename_opened)
-     char *path;
-     int try_cwd_first;
-     char *string;
-     int mode;
-     int prot;
-     char **filename_opened;
-{
-  register int fd;
-  register char *filename;
-  register char *p, *p1;
-  register int len;
-
-  if (!path)
-    path = ".";
-
-  /* ./foo => foo */
-  while (string[0] == '.' && string[1] == '/')
-    string += 2;
-
-  if (try_cwd_first || string[0] == '/')
-    {
-      filename = string;
-      fd = open (filename, mode, prot);
-      if (fd >= 0 || string[0] == '/')
-	goto done;
-    }
-
-  filename = (char *) alloca (strlen (path) + strlen (string) + 2);
-  fd = -1;
-  for (p = path; p; p = p1 ? p1 + 1 : 0)
-    {
-      p1 = (char *) index (p, ':');
-      if (p1)
-	len = p1 - p;
-      else
-	len = strlen (p);
-
-      strncpy (filename, p, len);
-      filename[len] = 0;
-      strcat (filename, "/");
-      strcat (filename, string);
-
-      fd = open (filename, mode, prot);
-      if (fd >= 0) break;
-    }
-
- done:
-  if (filename_opened)
-    if (fd < 0)
-      *filename_opened = (char *) 0;
-    else if (filename[0] == '/')
-      *filename_opened = savestring (filename, strlen (filename));
-    else
-      {
-	*filename_opened = concat (current_directory, "/", filename);
-      }
-
-  return fd;
-}
-
-/* Create and initialize the table S->line_charpos that records
-   the positions of the lines in the source file, which is assumed
-   to be open on descriptor DESC.
-   All set S->nlines to the number of such lines.  */
-
-static void
-find_source_lines (s, desc)
-     struct symtab *s;
-     int desc;
-{
-  struct stat st;
-  register char *data, *p, *end;
-  int nlines = 0;
-  int lines_allocated = 1000;
-  int *line_charpos = (int *) xmalloc (lines_allocated * sizeof (int));
-  extern int exec_mtime;
-
-  if (fstat (desc, &st) < 0)
-    perror_with_name (s->filename);
-  if (get_exec_file (0) != 0 && exec_mtime < st.st_mtime)
-    printf ("Source file is more recent than executable.\n");
-
-  data = (char *) alloca (st.st_size);
-  if (myread (desc, data, st.st_size) < 0)
-    perror_with_name (s->filename);
-  end = data + st.st_size;
-  p = data;
-  line_charpos[0] = 0;
-  nlines = 1;
-  while (p != end)
-    {
-      if (*p++ == '\n'
-	  /* A newline at the end does not start a new line.  */
-	  && p != end)
-	{
-	  if (nlines == lines_allocated)
-	    {
-	      lines_allocated *= 2;
-	      line_charpos = (int *) xrealloc (line_charpos,
-					       sizeof (int) * lines_allocated);
-	    }
-	  line_charpos[nlines++] = p - data;
-	}
-    }
-  s->nlines = nlines;
-  s->line_charpos = (int *) xrealloc (line_charpos, nlines * sizeof (int));
-}
-
-/* Return the character position of a line LINE in symtab S.
-   Return 0 if anything is invalid.  */
-
-int
-source_line_charpos (s, line)
-     struct symtab *s;
-     int line;
-{
-  if (!s) return 0;
-  if (!s->line_charpos || line <= 0) return 0;
-  if (line > s->nlines)
-    line = s->nlines;
-  return s->line_charpos[line - 1];
-}
-
-/* Return the line number of character position POS in symtab S.  */
-
-int
-source_charpos_line (s, chr)
-    register struct symtab *s;
-    register int chr;
-{
-  register int line = 0;
-  register int *lnp;
-    
-  if (s == 0 || s->line_charpos == 0) return 0;
-  lnp = s->line_charpos;
-  /* Files are usually short, so sequential search is Ok */
-  while (line < s->nlines  && *lnp <= chr)
-    {
-      line++;
-      lnp++;
-    }
-  if (line >= s->nlines)
-    line = s->nlines;
-  return line;
-}
-
-/* Get full pathname and line number positions for a symtab.
-   Return nonzero if line numbers may have changed.
-   Set *FULLNAME to actual name of the file as found by `openp',
-   or to 0 if the file is not found.  */
-
-int
-get_filename_and_charpos (s, line, fullname)
-     struct symtab *s;
-     int line;
-     char **fullname;
-{
-  register int desc, linenums_changed = 0;
-  
-  desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname);
-  if (desc < 0)
-    {
-      if (fullname)
-	*fullname = NULL;
-      return 0;
-    }  
-  if (fullname)
-    *fullname = s->fullname;
-  if (s->line_charpos == 0) linenums_changed = 1;
-  if (linenums_changed) find_source_lines (s, desc);
-  close (desc);
-  return linenums_changed;
-}
-
-/* Print text describing the full name of the source file S
-   and the line number LINE and its corresponding character position.
-   The text starts with two Ctrl-z so that the Emacs-GDB interface
-   can easily find it.
-
-   MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
-
-   Return 1 if successful, 0 if could not find the file.  */
-
-int
-identify_source_line (s, line, mid_statement)
-     struct symtab *s;
-     int line;
-     int mid_statement;
-{
-  if (s->line_charpos == 0)
-    get_filename_and_charpos (s, line, 0);
-  if (s->fullname == 0)
-    return 0;
-  printf ("\032\032%s:%d:%d:%s:0x%x\n", s->fullname,
-	  line, s->line_charpos[line - 1],
-	  mid_statement ? "middle" : "beg",
-	  get_frame_pc (get_current_frame()));
-  current_source_line = line;
-  first_line_listed = line;
-  last_line_listed = line;
-  current_source_symtab = s;
-  return 1;
-}
-
-/* Print source lines from the file of symtab S,
-   starting with line number LINE and stopping before line number STOPLINE.  */
-
-void
-print_source_lines (s, line, stopline, noerror)
-     struct symtab *s;
-     int line, stopline;
-     int noerror;
-{
-  register int c;
-  register int desc;
-  register FILE *stream;
-  int nlines = stopline - line;
-
-  desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname);
-  if (desc < 0)
-    {
-      extern int errno;
-      if (! noerror)
-	perror_with_name (s->filename);
-      print_sys_errmsg (s->filename, errno);
-      return;
-    }
-
-  if (s->line_charpos == 0)
-    find_source_lines (s, desc);
-
-  if (line < 1 || line > s->nlines)
-    {
-      close (desc);
-      error ("Line number %d out of range; %s has %d lines.",
-	     line, s->filename, s->nlines);
-    }
-
-  if (lseek (desc, s->line_charpos[line - 1], 0) < 0)
-    {
-      close (desc);
-      perror_with_name (s->filename);
-    }
-
-  current_source_symtab = s;
-  current_source_line = line;
-  first_line_listed = line;
-  
-  stream = fdopen (desc, "r");
-  clearerr (stream);
-
-  while (nlines-- > 0)
-    {
-      c = fgetc (stream);
-      if (c == EOF) break;
-      last_line_listed = current_source_line;
-      printf_filtered ("%d\t", current_source_line++);
-      do
-	{
-	  if (c < 040 && c != '\t' && c != '\n')
-	      printf_filtered ("^%c", c + 0100);
-	  else if (c == 0177)
-	    printf_filtered ("^?");
-	  else
-	    printf_filtered ("%c", c);
-	} while (c != '\n' && (c = fgetc (stream)) >= 0);
-    }
-
-  fclose (stream);
-}
-
-
-
-/* 
-  C++
-  Print a list of files and line numbers which a user may choose from
-  in order to list a function which was specified ambiguously
-  (as with `list classname::overloadedfuncname', for example).
-  The vector in SALS provides the filenames and line numbers.
-  */
-static void
-ambiguous_line_spec (sals)
-     struct symtabs_and_lines *sals;
-{
-  int i;
-
-  for (i = 0; i < sals->nelts; ++i)
-    printf("file: \"%s\", line number: %d\n",
-	   sals->sals[i].symtab->filename, sals->sals[i].line);
-}
-
-
-static void
-list_command (arg, from_tty)
-     char *arg;
-     int from_tty;
-{
-  struct symtabs_and_lines sals, sals_end;
-  struct symtab_and_line sal, sal_end;
-  struct symbol *sym;
-  char *arg1;
-  int no_end = 1;
-  int dummy_end = 0;
-  int dummy_beg = 0;
-  int linenum_beg = 0;
-  char *p;
-
-  if (symtab_list == 0 && partial_symtab_list == 0)
-    error ("No symbol table is loaded.  Use the \"symbol-file\" command.");
-
-  /* Pull in a current source symtab if necessary */
-  if (current_source_symtab == 0 &&
-      (arg == 0 || arg[0] == '+' || arg[0] == '-'))
-    select_source_symtab (0);
-
-  /* "l" or "l +" lists next ten lines.  */
-
-  if (arg == 0 || !strcmp (arg, "+"))
-    {
-      if (current_source_symtab == 0)
-	error ("No default source file yet.  Do \"help list\".");
-      print_source_lines (current_source_symtab, current_source_line,
-			  current_source_line + 10, 0);
-      return;
-    }
-
-  /* "l -" lists previous ten lines, the ones before the ten just listed.  */
-  if (!strcmp (arg, "-"))
-    {
-      if (current_source_symtab == 0)
-	error ("No default source file yet.  Do \"help list\".");
-      print_source_lines (current_source_symtab,
-			  max (first_line_listed - 10, 1),
-			  first_line_listed, 0);
-      return;
-    }
-
-  /* Now if there is only one argument, decode it in SAL
-     and set NO_END.
-     If there are two arguments, decode them in SAL and SAL_END
-     and clear NO_END; however, if one of the arguments is blank,
-     set DUMMY_BEG or DUMMY_END to record that fact.  */
-
-  arg1 = arg;
-  if (*arg1 == ',')
-    dummy_beg = 1;
-  else
-    {
-      sals = decode_line_1 (&arg1, 0, 0, 0);
-
-      if (! sals.nelts) return;  /*  C++  */
-      if (sals.nelts > 1)
-	{
-	  ambiguous_line_spec (&sals);
-	  free (sals.sals);
-	  return;
-	}
-
-      sal = sals.sals[0];
-      free (sals.sals);
-    }
-
-  /* Record whether the BEG arg is all digits.  */
-
-  for (p = arg; p != arg1 && *p >= '0' && *p <= '9'; p++);
-  linenum_beg = (p == arg1);
-
-  while (*arg1 == ' ' || *arg1 == '\t')
-    arg1++;
-  if (*arg1 == ',')
-    {
-      no_end = 0;
-      arg1++;
-      while (*arg1 == ' ' || *arg1 == '\t')
-	arg1++;
-      if (*arg1 == 0)
-	dummy_end = 1;
-      else
-	{
-	  if (dummy_beg)
-	    sals_end = decode_line_1 (&arg1, 0, 0, 0);
-	  else
-	    sals_end = decode_line_1 (&arg1, 0, sal.symtab, sal.line);
-	  if (sals_end.nelts == 0) 
-	    return;
-	  if (sals_end.nelts > 1)
-	    {
-	      ambiguous_line_spec (&sals_end);
-	      free (sals_end.sals);
-	      return;
-	    }
-	  sal_end = sals_end.sals[0];
-	  free (sals_end.sals);
-	}
-    }
-
-  if (*arg1)
-    error ("Junk at end of line specification.");
-
-  if (!no_end && !dummy_beg && !dummy_end
-      && sal.symtab != sal_end.symtab)
-    error ("Specified start and end are in different files.");
-  if (dummy_beg && dummy_end)
-    error ("Two empty args do not say what lines to list.");
- 
-  /* if line was specified by address,
-     first print exactly which line, and which file.
-     In this case, sal.symtab == 0 means address is outside
-     of all known source files, not that user failed to give a filename.  */
-  if (*arg == '*')
-    {
-      if (sal.symtab == 0)
-	error ("No source file for address 0x%x.", sal.pc);
-      sym = find_pc_function (sal.pc);
-      if (sym)
-	printf ("0x%x is in %s (%s, line %d).\n",
-		sal.pc, SYMBOL_NAME (sym), sal.symtab->filename, sal.line);
-      else
-	printf ("0x%x is in %s, line %d.\n",
-		sal.pc, sal.symtab->filename, sal.line);
-    }
-
-  /* If line was not specified by just a line number,
-     and it does not imply a symtab, it must be an undebuggable symbol
-     which means no source code.  */
-
-  if (! linenum_beg && sal.symtab == 0)
-    error ("No line number known for %s.", arg);
-
-  /* If this command is repeated with RET,
-     turn it into the no-arg variant.  */
-
-  if (from_tty)
-    *arg = 0;
-
-  if (dummy_beg && sal_end.symtab == 0)
-    error ("No default source file yet.  Do \"help list\".");
-  if (dummy_beg)
-    print_source_lines (sal_end.symtab, max (sal_end.line - 9, 1),
-			sal_end.line + 1, 0);
-  else if (sal.symtab == 0)
-    error ("No default source file yet.  Do \"help list\".");
-  else if (no_end)
-    print_source_lines (sal.symtab, max (sal.line - 5, 1), sal.line + 5, 0);
-  else
-    print_source_lines (sal.symtab, sal.line,
-			dummy_end ? sal.line + 10 : sal_end.line + 1,
-			0);
-}
-
-/* Print info on range of pc's in a specified line.  */
-
-static void
-line_info (arg, from_tty)
-     char *arg;
-     int from_tty;
-{
-  struct symtabs_and_lines sals;
-  struct symtab_and_line sal;
-  int start_pc, end_pc;
-  int i;
-
-  if (arg == 0)
-    {
-      sal.symtab = current_source_symtab;
-      sal.line = last_line_listed;
-      sals.nelts = 1;
-      sals.sals = (struct symtab_and_line *)
-	xmalloc (sizeof (struct symtab_and_line));
-      sals.sals[0] = sal;
-    }
-  else
-    {
-      sals = decode_line_spec_1 (arg, 0);
-      
-      /* If this command is repeated with RET,
-	 turn it into the no-arg variant.  */
-      if (from_tty)
-	*arg = 0;
-    }
-
-  /* C++  More than one line may have been specified, as when the user
-     specifies an overloaded function name. Print info on them all. */
-  for (i = 0; i < sals.nelts; i++)
-    {
-      sal = sals.sals[i];
-      
-      if (sal.symtab == 0)
-	error ("No source file specified.");
-
-      if (sal.line > 0
-	  && find_line_pc_range (sal.symtab, sal.line, &start_pc, &end_pc))
-	{
-	  if (start_pc == end_pc)
-	    printf ("Line %d of \"%s\" is at pc 0x%x but contains no code.\n",
-		    sal.line, sal.symtab->filename, start_pc);
-	  else
-	    printf ("Line %d of \"%s\" starts at pc 0x%x and ends at 0x%x.\n",
-		    sal.line, sal.symtab->filename, start_pc, end_pc);
-	  /* x/i should display this line's code.  */
-	  set_next_address (start_pc);
-	  /* Repeating "info line" should do the following line.  */
-	  last_line_listed = sal.line + 1;
-	}
-      else
-	printf ("Line number %d is out of range for \"%s\".\n",
-		sal.line, sal.symtab->filename);
-    }
-}
-
-/* Commands to search the source file for a regexp.  */
-
-static void
-forward_search_command (regex, from_tty)
-     char *regex;
-{
-  register int c;
-  register int desc;
-  register FILE *stream;
-  int line = last_line_listed + 1;
-  char *msg;
-
-  msg = (char *) re_comp (regex);
-  if (msg)
-    error (msg);
-
-  if (current_source_symtab == 0)
-    select_source_symtab (0);
-
-  /* Search from last_line_listed+1 in current_source_symtab */
-
-  desc = openp (source_path, 0, current_source_symtab->filename,
-		O_RDONLY, 0, &current_source_symtab->fullname);
-  if (desc < 0)
-    perror_with_name (current_source_symtab->filename);
-
-  if (current_source_symtab->line_charpos == 0)
-    find_source_lines (current_source_symtab, desc);
-
-  if (line < 1 || line > current_source_symtab->nlines)
-    {
-      close (desc);
-      error ("Expression not found");
-    }
-
-  if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
-    {
-      close (desc);
-      perror_with_name (current_source_symtab->filename);
-    }
-
-  stream = fdopen (desc, "r");
-  clearerr (stream);
-  while (1) {
-    char buf[4096];		/* Should be reasonable??? */
-    register char *p = buf;
-
-    c = fgetc (stream);
-    if (c == EOF)
-      break;
-    do {
-      *p++ = c;
-    } while (c != '\n' && (c = fgetc (stream)) >= 0);
-
-    /* we now have a source line in buf, null terminate and match */
-    *p = 0;
-    if (re_exec (buf) > 0)
-      {
-	/* Match! */
-	fclose (stream);
-	print_source_lines (current_source_symtab,
-			   line, line+1, 0);
-	current_source_line = max (line - 5, 1);
-	return;
-      }
-    line++;
-  }
-
-  printf ("Expression not found\n");
-  fclose (stream);
-}
-
-static void
-reverse_search_command (regex, from_tty)
-     char *regex;
-{
-  register int c;
-  register int desc;
-  register FILE *stream;
-  int line = last_line_listed - 1;
-  char *msg;
-
-  msg = (char *) re_comp (regex);
-  if (msg)
-    error (msg);
-
-  if (current_source_symtab == 0)
-    select_source_symtab (0);
-
-  /* Search from last_line_listed-1 in current_source_symtab */
-
-  desc = openp (source_path, 0, current_source_symtab->filename,
-		O_RDONLY, 0, &current_source_symtab->fullname);
-  if (desc < 0)
-    perror_with_name (current_source_symtab->filename);
-
-  if (current_source_symtab->line_charpos == 0)
-    find_source_lines (current_source_symtab, desc);
-
-  if (line < 1 || line > current_source_symtab->nlines)
-    {
-      close (desc);
-      error ("Expression not found");
-    }
-
-  if (lseek (desc, current_source_symtab->line_charpos[line - 1], 0) < 0)
-    {
-      close (desc);
-      perror_with_name (current_source_symtab->filename);
-    }
-
-  stream = fdopen (desc, "r");
-  clearerr (stream);
-  while (1)
-    {
-      char buf[4096];		/* Should be reasonable??? */
-      register char *p = buf;
-
-      c = fgetc (stream);
-      if (c == EOF)
-	break;
-      do {
-	*p++ = c;
-      } while (c != '\n' && (c = fgetc (stream)) >= 0);
-
-      /* We now have a source line in buf; null terminate and match.  */
-      *p = 0;
-      if (re_exec (buf) > 0)
-	{
-	  /* Match! */
-	  fclose (stream);
-	  print_source_lines (current_source_symtab,
-			      line, line+1, 0);
-	  current_source_line = max (line - 5, 1);
-	  return;
-	}
-      line--;
-      if (fseek (stream, current_source_symtab->line_charpos[line - 1], 0) < 0)
-	{
-	  fclose (stream);
-	  perror_with_name (current_source_symtab->filename);
-	}
-    }
-
-  printf ("Expression not found\n");
-  fclose (stream);
-  return;
-}
-
-void
-_initialize_source ()
-{
-  current_source_symtab = 0;
-  init_source_path ();
-
-  add_com ("directory", class_files, directory_command,
-	   "Add directory DIR to end of search path for source files.\n\
-With no argument, reset the search path to just the working directory\n\
-and forget cached info on line positions in source files.");
-
-  add_info ("directories", directories_info,
-	    "Current search path for finding source files.");
-
-  add_info ("line", line_info,
-	    "Core addresses of the code for a source line.\n\
-Line can be specified as\n\
-  LINENUM, to list around that line in current file,\n\
-  FILE:LINENUM, to list around that line in that file,\n\
-  FUNCTION, to list around beginning of that function,\n\
-  FILE:FUNCTION, to distinguish among like-named static functions.\n\
-Default is to describe the last source line that was listed.\n\n\
-This sets the default address for \"x\" to the line's first instruction\n\
-so that \"x/i\" suffices to start examining the machine code.\n\
-The address is also stored as the value of \"$_\".");
-
-  add_com ("forward-search", class_files, forward_search_command,
-	   "Search for regular expression (see regex(3)) from last line listed.");
-  add_com_alias ("search", "forward-search", class_files, 0);
-
-  add_com ("reverse-search", class_files, reverse_search_command,
-	   "Search backward for regular expression (see regex(3)) from last line listed.");
-
-  add_com ("list", class_files, list_command,
-	   "List specified function or line.\n\
-With no argument, lists ten more lines after or around previous listing.\n\
-\"list -\" lists the ten lines before a previous ten-line listing.\n\
-One argument specifies a line, and ten lines are listed around that line.\n\
-Two arguments with comma between specify starting and ending lines to list.\n\
-Lines can be specified in these ways:\n\
-  LINENUM, to list around that line in current file,\n\
-  FILE:LINENUM, to list around that line in that file,\n\
-  FUNCTION, to list around beginning of that function,\n\
-  FILE:FUNCTION, to distinguish among like-named static functions.\n\
-  *ADDRESS, to list around the line containing that address.\n\
-With two args if one is empty it stands for ten lines away from the other arg.");
-}
-