Initial creation of sourceware repository

1 files changed, 0 insertions, 1564 deletions

diff --git a/gdb/command.c b/gdb/command.c
deleted file mode 100644
index 58af567..0000000
--- a/gdb/command.c
+++ /dev/null
@@ -1,1564 +0,0 @@
-/* Handle lists of commands, their decoding and documentation, for GDB.
-   Copyright 1986, 1989, 1990, 1991, 1998 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 of the License, 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.  */
-
-#include "defs.h"
-#include "gdbcmd.h"
-#include "symtab.h"
-#include "value.h"
-#include <ctype.h>
-#include "gdb_string.h"
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#ifdef HAVE_WAIT_H
-# include <wait.h>
-#else
-# ifdef HAVE_SYS_WAIT_H
-#  include <sys/wait.h>
-# endif
-#endif
-
-#include "wait.h"
-
-/* Prototypes for local functions */
-
-static void undef_cmd_error PARAMS ((char *, char *));
-
-static void show_user PARAMS ((char *, int));
-
-static void show_user_1 PARAMS ((struct cmd_list_element *, GDB_FILE *));
-
-static void make_command PARAMS ((char *, int));
-
-static void shell_escape PARAMS ((char *, int));
-
-static int parse_binary_operation PARAMS ((char *));
-
-static void print_doc_line PARAMS ((GDB_FILE *, char *));
-
-void _initialize_command PARAMS ((void));
-
-/* Add element named NAME.
-   CLASS is the top level category into which commands are broken down
-   for "help" purposes.
-   FUN should be the function to execute the command;
-   it will get a character string as argument, with leading
-   and trailing blanks already eliminated.
-
-   DOC is a documentation string for the command.
-   Its first line should be a complete sentence.
-   It should start with ? for a command that is an abbreviation
-   or with * for a command that most users don't need to know about.
-
-   Add this command to command list *LIST.  
-
-   Returns a pointer to the added command (not necessarily the head 
-   of *LIST). */
-
-struct cmd_list_element *
-add_cmd (name, class, fun, doc, list)
-     char *name;
-     enum command_class class;
-     void (*fun) PARAMS ((char *, int));
-     char *doc;
-     struct cmd_list_element **list;
-{
-  register struct cmd_list_element *c
-    = (struct cmd_list_element *) xmalloc (sizeof (struct cmd_list_element));
-  struct cmd_list_element *p;
-
-  delete_cmd (name, list);
-
-  if (*list == NULL || STRCMP ((*list)->name, name) >= 0)
-    {
-      c->next = *list;
-      *list = c;
-    }
-  else
-    {
-      p = *list;
-      while (p->next && STRCMP (p->next->name, name) <= 0)
-        {
-          p = p->next;
-        }
-      c->next = p->next;
-      p->next = c;
-    }
-
-  c->name = name;
-  c->class = class;
-  c->function.cfunc = fun;
-  c->doc = doc;
-  c->hook = NULL;
-  c->prefixlist = NULL;
-  c->prefixname = NULL;
-  c->allow_unknown = 0;
-  c->abbrev_flag = 0;
-  c->completer = make_symbol_completion_list;
-  c->type = not_set_cmd;
-  c->var = NULL;
-  c->var_type = var_boolean;
-  c->enums = NULL;
-  c->user_commands = NULL;
-  c->hookee = NULL;
-  c->cmd_pointer = NULL;
-
-  return c;
-}
-
-/* Same as above, except that the abbrev_flag is set. */
-
-#if 0	/* Currently unused */
-
-struct cmd_list_element *
-add_abbrev_cmd (name, class, fun, doc, list)
-     char *name;
-     enum command_class class;
-     void (*fun) PARAMS ((char *, int));
-     char *doc;
-     struct cmd_list_element **list;
-{
-  register struct cmd_list_element *c
-    = add_cmd (name, class, fun, doc, list);
-
-  c->abbrev_flag = 1;
-  return c;
-}
-
-#endif
-
-struct cmd_list_element *
-add_alias_cmd (name, oldname, class, abbrev_flag, list)
-     char *name;
-     char *oldname;
-     enum command_class class;
-     int abbrev_flag;
-     struct cmd_list_element **list;
-{
-  /* Must do this since lookup_cmd tries to side-effect its first arg */
-  char *copied_name;
-  register struct cmd_list_element *old;
-  register struct cmd_list_element *c;
-  copied_name = (char *) alloca (strlen (oldname) + 1);
-  strcpy (copied_name, oldname);
-  old  = lookup_cmd (&copied_name, *list, "", 1, 1);
-
-  if (old == 0)
-    {
-      delete_cmd (name, list);
-      return 0;
-    }
-
-  c = add_cmd (name, class, old->function.cfunc, old->doc, list);
-  c->prefixlist = old->prefixlist;
-  c->prefixname = old->prefixname;
-  c->allow_unknown = old->allow_unknown;
-  c->abbrev_flag = abbrev_flag;
-  c->cmd_pointer = old;
-  return c;
-}
-
-/* Like add_cmd but adds an element for a command prefix:
-   a name that should be followed by a subcommand to be looked up
-   in another command list.  PREFIXLIST should be the address
-   of the variable containing that list.  */
-
-struct cmd_list_element *
-add_prefix_cmd (name, class, fun, doc, prefixlist, prefixname,
-		allow_unknown, list)
-     char *name;
-     enum command_class class;
-     void (*fun) PARAMS ((char *, int));
-     char *doc;
-     struct cmd_list_element **prefixlist;
-     char *prefixname;
-     int allow_unknown;
-     struct cmd_list_element **list;
-{
-  register struct cmd_list_element *c = add_cmd (name, class, fun, doc, list);
-  c->prefixlist = prefixlist;
-  c->prefixname = prefixname;
-  c->allow_unknown = allow_unknown;
-  return c;
-}
-
-/* Like add_prefix_cmd but sets the abbrev_flag on the new command. */
-   
-struct cmd_list_element *
-add_abbrev_prefix_cmd (name, class, fun, doc, prefixlist, prefixname,
-		       allow_unknown, list)
-     char *name;
-     enum command_class class;
-     void (*fun) PARAMS ((char *, int));
-     char *doc;
-     struct cmd_list_element **prefixlist;
-     char *prefixname;
-     int allow_unknown;
-     struct cmd_list_element **list;
-{
-  register struct cmd_list_element *c = add_cmd (name, class, fun, doc, list);
-  c->prefixlist = prefixlist;
-  c->prefixname = prefixname;
-  c->allow_unknown = allow_unknown;
-  c->abbrev_flag = 1;
-  return c;
-}
-
-/* This is an empty "cfunc".  */
-void
-not_just_help_class_command (args, from_tty)
-     char *args;
-     int from_tty;
-{
-}
-
-/* This is an empty "sfunc".  */
-static void empty_sfunc PARAMS ((char *, int, struct cmd_list_element *));
-
-static void
-empty_sfunc (args, from_tty, c)
-     char *args;
-     int from_tty;
-     struct cmd_list_element *c;
-{
-}
-
-/* Add element named NAME to command list LIST (the list for set
-   or some sublist thereof).
-   CLASS is as in add_cmd.
-   VAR_TYPE is the kind of thing we are setting.
-   VAR is address of the variable being controlled by this command.
-   DOC is the documentation string.  */
-
-struct cmd_list_element *
-add_set_cmd (name, class, var_type, var, doc, list)
-     char *name;
-     enum command_class class;
-     var_types var_type;
-     char *var;
-     char *doc;
-     struct cmd_list_element **list;
-{
-  struct cmd_list_element *c
-    = add_cmd (name, class, NO_FUNCTION, doc, list);
-
-  c->type = set_cmd;
-  c->var_type = var_type;
-  c->var = var;
-  /* This needs to be something besides NO_FUNCTION so that this isn't
-     treated as a help class.  */
-  c->function.sfunc = empty_sfunc;
-  return c;
-}
-
-/* Add element named NAME to command list LIST (the list for set
-   or some sublist thereof).
-   CLASS is as in add_cmd.
-   ENUMLIST is a list of strings which may follow NAME.
-   VAR is address of the variable which will contain the matching string
-     (from ENUMLIST).
-   DOC is the documentation string.  */
-
-struct cmd_list_element *
-add_set_enum_cmd (name, class, enumlist, var, doc, list)
-     char *name;
-     enum command_class class;
-     char *enumlist[];
-     char *var;
-     char *doc;
-     struct cmd_list_element **list;
-{
-  struct cmd_list_element *c
-    = add_set_cmd (name, class, var_enum, var, doc, list);
-  c->enums = enumlist;
-
-  return c;
-}
-
-/* Where SETCMD has already been added, add the corresponding show
-   command to LIST and return a pointer to the added command (not 
-   necessarily the head of LIST).  */
-struct cmd_list_element *
-add_show_from_set (setcmd, list)
-     struct cmd_list_element *setcmd;
-     struct cmd_list_element **list;
-{
-  struct cmd_list_element *showcmd =
-    (struct cmd_list_element *) xmalloc (sizeof (struct cmd_list_element));
-  struct cmd_list_element *p;
-
-  memcpy (showcmd, setcmd, sizeof (struct cmd_list_element));
-  delete_cmd (showcmd->name, list);
-  showcmd->type = show_cmd;
-  
-  /* Replace "set " at start of docstring with "show ".  */
-  if (setcmd->doc[0] == 'S' && setcmd->doc[1] == 'e'
-      && setcmd->doc[2] == 't' && setcmd->doc[3] == ' ')
-    showcmd->doc = concat ("Show ", setcmd->doc + 4, NULL);
-  else
-    fprintf_unfiltered (gdb_stderr, "GDB internal error: Bad docstring for set command\n");
-  
-    if (*list == NULL || STRCMP ((*list)->name, showcmd->name) >= 0)
-    {
-      showcmd->next = *list;
-      *list = showcmd;
-    }
-  else
-    {
-      p = *list;
-      while (p->next && STRCMP (p->next->name, showcmd->name) <= 0)
-        {
-          p = p->next;
-        }
-      showcmd->next = p->next;
-      p->next = showcmd;
-    }
-
-  return showcmd;
-}
-
-/* Remove the command named NAME from the command list.  */
-
-void
-delete_cmd (name, list)
-     char *name;
-     struct cmd_list_element **list;
-{
-  register struct cmd_list_element *c;
-  struct cmd_list_element *p;
-
-  while (*list && STREQ ((*list)->name, name))
-    {
-      if ((*list)->hookee)
-	(*list)->hookee->hook = 0;	/* Hook slips out of its mouth */
-      p = (*list)->next;
-      free ((PTR)*list);
-      *list = p;
-    }
-
-  if (*list)
-    for (c = *list; c->next;)
-      {
-	if (STREQ (c->next->name, name))
-	  {
-	    if (c->next->hookee)
-	      c->next->hookee->hook = 0;  /* hooked cmd gets away.  */
-	    p = c->next->next;
-	    free ((PTR)c->next);
-	    c->next = p;
-	  }
-	else
-	  c = c->next;
-      }
-}
-
-/* This command really has to deal with two things:
- *     1) I want documentation on *this string* (usually called by
- * "help commandname").
- *     2) I want documentation on *this list* (usually called by
- * giving a command that requires subcommands.  Also called by saying
- * just "help".)
- *
- *   I am going to split this into two seperate comamnds, help_cmd and
- * help_list. 
- */
-
-void
-help_cmd (command, stream)
-     char *command;
-     GDB_FILE *stream;
-{
-  struct cmd_list_element *c;
-  extern struct cmd_list_element *cmdlist;
-
-  if (!command)
-    {
-      help_list (cmdlist, "", all_classes, stream);
-      return;
-    }
-
-  c = lookup_cmd (&command, cmdlist, "", 0, 0);
-
-  if (c == 0)
-    return;
-
-  /* There are three cases here.
-     If c->prefixlist is nonzero, we have a prefix command.
-     Print its documentation, then list its subcommands.
-     
-     If c->function is nonzero, we really have a command.
-     Print its documentation and return.
-     
-     If c->function is zero, we have a class name.
-     Print its documentation (as if it were a command)
-     and then set class to the number of this class
-     so that the commands in the class will be listed.  */
-
-  fputs_filtered (c->doc, stream);
-  fputs_filtered ("\n", stream);
-
-  if (c->prefixlist == 0 && c->function.cfunc != NULL)
-    return;
-  fprintf_filtered (stream, "\n");
-
-  /* If this is a prefix command, print it's subcommands */
-  if (c->prefixlist)
-    help_list (*c->prefixlist, c->prefixname, all_commands, stream);
-
-  /* If this is a class name, print all of the commands in the class */
-  if (c->function.cfunc == NULL)
-    help_list (cmdlist, "", c->class, stream);
-
-  if (c->hook)
-    fprintf_filtered (stream, "\nThis command has a hook defined: %s\n",
-		      c->hook->name);
-}
-
-/*
- * Get a specific kind of help on a command list.
- *
- * LIST is the list.
- * CMDTYPE is the prefix to use in the title string.
- * CLASS is the class with which to list the nodes of this list (see
- * documentation for help_cmd_list below),  As usual, ALL_COMMANDS for
- * everything, ALL_CLASSES for just classes, and non-negative for only things
- * in a specific class.
- * and STREAM is the output stream on which to print things.
- * If you call this routine with a class >= 0, it recurses.
- */
-void
-help_list (list, cmdtype, class, stream)
-     struct cmd_list_element *list;
-     char *cmdtype;
-     enum command_class class;
-     GDB_FILE *stream;
-{
-  int len;
-  char *cmdtype1, *cmdtype2;
-  
-  /* If CMDTYPE is "foo ", CMDTYPE1 gets " foo" and CMDTYPE2 gets "foo sub"  */
-  len = strlen (cmdtype);
-  cmdtype1 = (char *) alloca (len + 1);
-  cmdtype1[0] = 0;
-  cmdtype2 = (char *) alloca (len + 4);
-  cmdtype2[0] = 0;
-  if (len)
-    {
-      cmdtype1[0] = ' ';
-      strncpy (cmdtype1 + 1, cmdtype, len - 1);
-      cmdtype1[len] = 0;
-      strncpy (cmdtype2, cmdtype, len - 1);
-      strcpy (cmdtype2 + len - 1, " sub");
-    }
-
-  if (class == all_classes)
-    fprintf_filtered (stream, "List of classes of %scommands:\n\n", cmdtype2);
-  else
-    fprintf_filtered (stream, "List of %scommands:\n\n", cmdtype2);
-
-  help_cmd_list (list, class, cmdtype, (int)class >= 0, stream);
-
-  if (class == all_classes)
-    fprintf_filtered (stream, "\n\
-Type \"help%s\" followed by a class name for a list of commands in that class.",
-	     cmdtype1);
-
-  fprintf_filtered (stream, "\n\
-Type \"help%s\" followed by %scommand name for full documentation.\n\
-Command name abbreviations are allowed if unambiguous.\n",
-	   cmdtype1, cmdtype2);
-}
-     
-/* Print only the first line of STR on STREAM.  */
-static void
-print_doc_line (stream, str)
-     GDB_FILE *stream;
-     char *str;
-{
-  static char *line_buffer = 0;
-  static int line_size;
-  register char *p;
-
-  if (!line_buffer)
-    {
-      line_size = 80;
-      line_buffer = (char *) xmalloc (line_size);
-    }
-
-  p = str;
-  while (*p && *p != '\n' && *p != '.' && *p != ',')
-    p++;
-  if (p - str > line_size - 1)
-    {
-      line_size = p - str + 1;
-      free ((PTR)line_buffer);
-      line_buffer = (char *) xmalloc (line_size);
-    }
-  strncpy (line_buffer, str, p - str);
-  line_buffer[p - str] = '\0';
-  if (islower (line_buffer[0]))
-    line_buffer[0] = toupper (line_buffer[0]);
-  fputs_filtered (line_buffer, stream);
-}
-
-/*
- * Implement a help command on command list LIST.
- * RECURSE should be non-zero if this should be done recursively on
- * all sublists of LIST.
- * PREFIX is the prefix to print before each command name.
- * STREAM is the stream upon which the output should be written.
- * CLASS should be:
- *	A non-negative class number to list only commands in that
- * class.
- *	ALL_COMMANDS to list all commands in list.
- *	ALL_CLASSES  to list all classes in list.
- *
- *   Note that RECURSE will be active on *all* sublists, not just the
- * ones selected by the criteria above (ie. the selection mechanism
- * is at the low level, not the high-level).
- */
-void
-help_cmd_list (list, class, prefix, recurse, stream)
-     struct cmd_list_element *list;
-     enum command_class class;
-     char *prefix;
-     int recurse;
-     GDB_FILE *stream;
-{
-  register struct cmd_list_element *c;
-
-  for (c = list; c; c = c->next)
-    {
-      if (c->abbrev_flag == 0 &&
-	  (class == all_commands
-	  || (class == all_classes && c->function.cfunc == NULL)
-	  || (class == c->class && c->function.cfunc != NULL)))
-	{
-	  fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
-	  print_doc_line (stream, c->doc);
-	  fputs_filtered ("\n", stream);
-	}
-      if (recurse
-	  && c->prefixlist != 0
-	  && c->abbrev_flag == 0)
-	help_cmd_list (*c->prefixlist, class, c->prefixname, 1, stream);
-    }
-}
-
-
-/* Search the input clist for 'command'.  Return the command if
-   found (or NULL if not), and return the number of commands
-   found in nfound */
-
-static struct cmd_list_element *
-find_cmd(command, len, clist, ignore_help_classes, nfound)
-     char *command;
-     struct cmd_list_element *clist;
-     int ignore_help_classes;
-     int *nfound;
-{
-  struct cmd_list_element *found, *c;
-
-  found = (struct cmd_list_element *)NULL;
-  *nfound = 0;
-  for (c = clist; c; c = c->next)
-    if (!strncmp (command, c->name, len)
-        && (!ignore_help_classes || c->function.cfunc))
-      {
-        found = c;
-        (*nfound)++;
-        if (c->name[len] == '\0')
-          {
-            *nfound = 1;
-            break;
-          }
-      }
-  return found;
-}
-
-/* This routine takes a line of TEXT and a CLIST in which to start the
-   lookup.  When it returns it will have incremented the text pointer past
-   the section of text it matched, set *RESULT_LIST to point to the list in
-   which the last word was matched, and will return a pointer to the cmd
-   list element which the text matches.  It will return NULL if no match at
-   all was possible.  It will return -1 (cast appropriately, ick) if ambigous
-   matches are possible; in this case *RESULT_LIST will be set to point to
-   the list in which there are ambiguous choices (and *TEXT will be set to
-   the ambiguous text string).
-
-   If the located command was an abbreviation, this routine returns the base
-   command of the abbreviation.
-
-   It does no error reporting whatsoever; control will always return
-   to the superior routine.
-
-   In the case of an ambiguous return (-1), *RESULT_LIST will be set to point
-   at the prefix_command (ie. the best match) *or* (special case) will be NULL
-   if no prefix command was ever found.  For example, in the case of "info a",
-   "info" matches without ambiguity, but "a" could be "args" or "address", so
-   *RESULT_LIST is set to the cmd_list_element for "info".  So in this case
-   RESULT_LIST should not be interpeted as a pointer to the beginning of a
-   list; it simply points to a specific command.  In the case of an ambiguous
-   return *TEXT is advanced past the last non-ambiguous prefix (e.g.
-   "info t" can be "info types" or "info target"; upon return *TEXT has been
-   advanced past "info ").
-
-   If RESULT_LIST is NULL, don't set *RESULT_LIST (but don't otherwise
-   affect the operation).
-
-   This routine does *not* modify the text pointed to by TEXT.
-   
-   If IGNORE_HELP_CLASSES is nonzero, ignore any command list elements which
-   are actually help classes rather than commands (i.e. the function field of
-   the struct cmd_list_element is NULL).  */
-
-struct cmd_list_element *
-lookup_cmd_1 (text, clist, result_list, ignore_help_classes)
-     char **text;
-     struct cmd_list_element *clist, **result_list;
-     int ignore_help_classes;
-{
-  char *p, *command;
-  int len, tmp, nfound;
-  struct cmd_list_element *found, *c;
-
-  while (**text == ' ' || **text == '\t')
-    (*text)++;
-
-  /* Treating underscores as part of command words is important
-     so that "set args_foo()" doesn't get interpreted as
-     "set args _foo()".  */
-  for (p = *text;
-       *p && (isalnum(*p) || *p == '-' || *p == '_' ||
-	      (tui_version &&
-	       (*p == '+' || *p == '<' || *p == '>' || *p == '$')) ||
-	      (xdb_commands && (*p == '!' || *p == '/' || *p == '?')));
-       p++)
-    ;
-
-  /* If nothing but whitespace, return 0.  */
-  if (p == *text)
-    return 0;
-  
-  len = p - *text;
-
-  /* *text and p now bracket the first command word to lookup (and
-     it's length is len).  We copy this into a local temporary */
-
-
-  command = (char *) alloca (len + 1);
-  for (tmp = 0; tmp < len; tmp++)
-    {
-      char x = (*text)[tmp];
-      command[tmp] = x;
-    }
-  command[len] = '\0';
-
-  /* Look it up.  */
-  found = 0;
-  nfound = 0;
-  found = find_cmd(command, len, clist, ignore_help_classes, &nfound);
-
-  /* 
-  ** We didn't find the command in the entered case, so lower case it
-  ** and search again.
-  */
-  if (!found || nfound == 0)
-    {
-      for (tmp = 0; tmp < len; tmp++)
-        {
-          char x = command[tmp];
-          command[tmp] = isupper(x) ? tolower(x) : x;
-        }
-      found = find_cmd(command, len, clist, ignore_help_classes, &nfound);
-    }
-
-  /* If nothing matches, we have a simple failure.  */
-  if (nfound == 0)
-    return 0;
-
-  if (nfound > 1)
-    {
-      if (result_list != NULL)
-	/* Will be modified in calling routine
-	   if we know what the prefix command is.  */
-	*result_list = 0;		
-      return (struct cmd_list_element *) -1; /* Ambiguous.  */
-    }
-
-  /* We've matched something on this list.  Move text pointer forward. */
-
-  *text = p;
-
-  /* If this was an abbreviation, use the base command instead.  */
-
-  if (found->cmd_pointer)
-    found = found->cmd_pointer;
-
-  /* If we found a prefix command, keep looking.  */
-
-  if (found->prefixlist)
-    {
-      c = lookup_cmd_1 (text, *found->prefixlist, result_list,
-			ignore_help_classes);
-      if (!c)
-	{
-	  /* Didn't find anything; this is as far as we got.  */
-	  if (result_list != NULL)
-	    *result_list = clist;
-	  return found;
-	}
-      else if (c == (struct cmd_list_element *) -1)
-	{
-	  /* We've gotten this far properly, but the next step
-	     is ambiguous.  We need to set the result list to the best
-	     we've found (if an inferior hasn't already set it).  */
-	  if (result_list != NULL)
-	    if (!*result_list)
-	      /* This used to say *result_list = *found->prefixlist
-		 If that was correct, need to modify the documentation
-		 at the top of this function to clarify what is supposed
-		 to be going on.  */
-	      *result_list = found;
-	  return c;
-	}
-      else
-	{
-	  /* We matched!  */
-	  return c;
-	}
-    }
-  else
-    {
-      if (result_list != NULL)
-	*result_list = clist;
-      return found;
-    }
-}
-
-/* All this hair to move the space to the front of cmdtype */
-
-static void
-undef_cmd_error (cmdtype, q)
-     char *cmdtype, *q;
-{
-  error ("Undefined %scommand: \"%s\".  Try \"help%s%.*s\".",
-    cmdtype,
-    q,
-    *cmdtype? " ": "",
-    strlen(cmdtype)-1,
-    cmdtype);
-}
-
-/* Look up the contents of *LINE as a command in the command list LIST.
-   LIST is a chain of struct cmd_list_element's.
-   If it is found, return the struct cmd_list_element for that command
-   and update *LINE to point after the command name, at the first argument.
-   If not found, call error if ALLOW_UNKNOWN is zero
-   otherwise (or if error returns) return zero.
-   Call error if specified command is ambiguous,
-   unless ALLOW_UNKNOWN is negative.
-   CMDTYPE precedes the word "command" in the error message.
-
-   If INGNORE_HELP_CLASSES is nonzero, ignore any command list
-   elements which are actually help classes rather than commands (i.e.
-   the function field of the struct cmd_list_element is 0).  */
-
-struct cmd_list_element *
-lookup_cmd (line, list, cmdtype, allow_unknown, ignore_help_classes)
-     char **line;
-     struct cmd_list_element *list;
-     char *cmdtype;
-     int allow_unknown;
-     int ignore_help_classes;
-{
-  struct cmd_list_element *last_list = 0;
-  struct cmd_list_element *c =
-    lookup_cmd_1 (line, list, &last_list, ignore_help_classes);
-#if 0
-  /* This is wrong for complete_command.  */
-  char *ptr = (*line) + strlen (*line) - 1;
-
-  /* Clear off trailing whitespace.  */
-  while (ptr >= *line && (*ptr == ' ' || *ptr == '\t'))
-    ptr--;
-  *(ptr + 1) = '\0';
-#endif
-  
-  if (!c)
-    {
-      if (!allow_unknown)
-	{
-	  if (!*line)
-	    error ("Lack of needed %scommand", cmdtype);
-	  else
-	    {
-	      char *p = *line, *q;
-
-	      while (isalnum(*p) || *p == '-')
-		p++;
-
-	      q = (char *) alloca (p - *line + 1);
-	      strncpy (q, *line, p - *line);
-	      q[p - *line] = '\0';
-	      undef_cmd_error (cmdtype, q);
-	    }
-	}
-      else
-	return 0;
-    }
-  else if (c == (struct cmd_list_element *) -1)
-    {
-      /* Ambigous.  Local values should be off prefixlist or called
-	 values.  */
-      int local_allow_unknown = (last_list ? last_list->allow_unknown :
-				 allow_unknown);
-      char *local_cmdtype = last_list ? last_list->prefixname : cmdtype;
-      struct cmd_list_element *local_list =
-	(last_list ? *(last_list->prefixlist) : list);
-      
-      if (local_allow_unknown < 0)
-	{
-	  if (last_list)
-	    return last_list;	/* Found something.  */
-	  else
-	    return 0;		/* Found nothing.  */
-	}
-      else
-	{
-	  /* Report as error.  */
-	  int amb_len;
-	  char ambbuf[100];
-
-	  for (amb_len = 0;
-	       ((*line)[amb_len] && (*line)[amb_len] != ' '
-		&& (*line)[amb_len] != '\t');
-	       amb_len++)
-	    ;
-	  
-	  ambbuf[0] = 0;
-	  for (c = local_list; c; c = c->next)
-	    if (!strncmp (*line, c->name, amb_len))
-	      {
-		if (strlen (ambbuf) + strlen (c->name) + 6 < (int)sizeof ambbuf)
-		  {
-		    if (strlen (ambbuf))
-		      strcat (ambbuf, ", ");
-		    strcat (ambbuf, c->name);
-		  }
-		else
-		  {
-		    strcat (ambbuf, "..");
-		    break;
-		  }
-	      }
-	  error ("Ambiguous %scommand \"%s\": %s.", local_cmdtype,
-		 *line, ambbuf);
-	  return 0;		/* lint */
-	}
-    }
-  else
-    {
-      /* We've got something.  It may still not be what the caller
-         wants (if this command *needs* a subcommand).  */
-      while (**line == ' ' || **line == '\t')
-	(*line)++;
-
-      if (c->prefixlist && **line && !c->allow_unknown)
-	undef_cmd_error (c->prefixname, *line);
-
-      /* Seems to be what he wants.  Return it.  */
-      return c;
-    }
-  return 0;
-}
-	
-#if 0
-/* Look up the contents of *LINE as a command in the command list LIST.
-   LIST is a chain of struct cmd_list_element's.
-   If it is found, return the struct cmd_list_element for that command
-   and update *LINE to point after the command name, at the first argument.
-   If not found, call error if ALLOW_UNKNOWN is zero
-   otherwise (or if error returns) return zero.
-   Call error if specified command is ambiguous,
-   unless ALLOW_UNKNOWN is negative.
-   CMDTYPE precedes the word "command" in the error message.  */
-
-struct cmd_list_element *
-lookup_cmd (line, list, cmdtype, allow_unknown)
-     char **line;
-     struct cmd_list_element *list;
-     char *cmdtype;
-     int allow_unknown;
-{
-  register char *p;
-  register struct cmd_list_element *c, *found;
-  int nfound;
-  char ambbuf[100];
-  char *processed_cmd;
-  int i, cmd_len;
-
-  /* Skip leading whitespace.  */
-
-  while (**line == ' ' || **line == '\t')
-    (*line)++;
-
-  /* Clear out trailing whitespace.  */
-
-  p = *line + strlen (*line);
-  while (p != *line && (p[-1] == ' ' || p[-1] == '\t'))
-    p--;
-  *p = 0;
-
-  /* Find end of command name.  */
-
-  p = *line;
-  while (*p == '-' || isalnum(*p))
-    p++;
-
-  /* Look up the command name.
-     If exact match, keep that.
-     Otherwise, take command abbreviated, if unique.  Note that (in my
-     opinion) a null string does *not* indicate ambiguity; simply the
-     end of the argument.  */
-
-  if (p == *line)
-    {
-      if (!allow_unknown)
-	error ("Lack of needed %scommand", cmdtype);
-      return 0;
-    }
-  
-  /* Copy over to a local buffer, converting to lowercase on the way.
-     This is in case the command being parsed is a subcommand which
-     doesn't match anything, and that's ok.  We want the original
-     untouched for the routine of the original command.  */
-  
-  processed_cmd = (char *) alloca (p - *line + 1);
-  for (cmd_len = 0; cmd_len < p - *line; cmd_len++)
-    {
-      char x = (*line)[cmd_len];
-      if (isupper(x))
-	processed_cmd[cmd_len] = tolower(x);
-      else
-	processed_cmd[cmd_len] = x;
-    }
-  processed_cmd[cmd_len] = '\0';
-
-  /* Check all possibilities in the current command list.  */
-  found = 0;
-  nfound = 0;
-  for (c = list; c; c = c->next)
-    {
-      if (!strncmp (processed_cmd, c->name, cmd_len))
-	{
-	  found = c;
-	  nfound++;
-	  if (c->name[cmd_len] == 0)
-	    {
-	      nfound = 1;
-	      break;
-	    }
-	}
-    }
-
-  /* Report error for undefined command name.  */
-
-  if (nfound != 1)
-    {
-      if (nfound > 1 && allow_unknown >= 0)
-	{
-	  ambbuf[0] = 0;
-	  for (c = list; c; c = c->next)
-	    if (!strncmp (processed_cmd, c->name, cmd_len))
-	      {
-		if (strlen (ambbuf) + strlen (c->name) + 6 < sizeof ambbuf)
-		  {
-		    if (strlen (ambbuf))
-		      strcat (ambbuf, ", ");
-		    strcat (ambbuf, c->name);
-		  }
-		else
-		  {
-		    strcat (ambbuf, "..");
-		    break;
-		  }
-	      }
-	  error ("Ambiguous %scommand \"%s\": %s.", cmdtype,
-		 processed_cmd, ambbuf);
-	}
-      else if (!allow_unknown)
-	error ("Undefined %scommand: \"%s\".", cmdtype, processed_cmd);
-      return 0;
-    }
-
-  /* Skip whitespace before the argument.  */
-
-  while (*p == ' ' || *p == '\t') p++;
-  *line = p;
-
-  if (found->prefixlist && *p)
-    {
-      c = lookup_cmd (line, *found->prefixlist, found->prefixname,
-		      found->allow_unknown);
-      if (c)
-	return c;
-    }
-
-  return found;
-}
-#endif
-
-/* Helper function for SYMBOL_COMPLETION_FUNCTION.  */
-
-/* Return a vector of char pointers which point to the different
-   possible completions in LIST of TEXT.  
-
-   WORD points in the same buffer as TEXT, and completions should be
-   returned relative to this position.  For example, suppose TEXT is "foo"
-   and we want to complete to "foobar".  If WORD is "oo", return
-   "oobar"; if WORD is "baz/foo", return "baz/foobar".  */
-
-char **
-complete_on_cmdlist (list, text, word)
-     struct cmd_list_element *list;
-     char *text;
-     char *word;
-{
-  struct cmd_list_element *ptr;
-  char **matchlist;
-  int sizeof_matchlist;
-  int matches;
-  int textlen = strlen (text);
-
-  sizeof_matchlist = 10;
-  matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *));
-  matches = 0;
-
-  for (ptr = list; ptr; ptr = ptr->next)
-    if (!strncmp (ptr->name, text, textlen)
-	&& !ptr->abbrev_flag
-	&& (ptr->function.cfunc
-	    || ptr->prefixlist))
-      {
-	if (matches == sizeof_matchlist)
-	  {
-	    sizeof_matchlist *= 2;
-	    matchlist = (char **) xrealloc ((char *)matchlist,
-					    (sizeof_matchlist
-					     * sizeof (char *)));
-	  }
-
-	matchlist[matches] = (char *) 
-	  xmalloc (strlen (word) + strlen (ptr->name) + 1);
-	if (word == text)
-	  strcpy (matchlist[matches], ptr->name);
-	else if (word > text)
-	  {
-	    /* Return some portion of ptr->name.  */
-	    strcpy (matchlist[matches], ptr->name + (word - text));
-	  }
-	else
-	  {
-	    /* Return some of text plus ptr->name.  */
-	    strncpy (matchlist[matches], word, text - word);
-	    matchlist[matches][text - word] = '\0';
-	    strcat (matchlist[matches], ptr->name);
-	  }
-	++matches;
-      }
-
-  if (matches == 0)
-    {
-      free ((PTR)matchlist);
-      matchlist = 0;
-    }
-  else
-    {
-      matchlist = (char **) xrealloc ((char *)matchlist, ((matches + 1)
-						* sizeof (char *)));
-      matchlist[matches] = (char *) 0;
-    }
-
-  return matchlist;
-}
-
-/* Helper function for SYMBOL_COMPLETION_FUNCTION.  */
-
-/* Return a vector of char pointers which point to the different
-   possible completions in CMD of TEXT.  
-
-   WORD points in the same buffer as TEXT, and completions should be
-   returned relative to this position.  For example, suppose TEXT is "foo"
-   and we want to complete to "foobar".  If WORD is "oo", return
-   "oobar"; if WORD is "baz/foo", return "baz/foobar".  */
-
-char **
-complete_on_enum (enumlist, text, word)
-     char **enumlist;
-     char *text;
-     char *word;
-{
-  char **matchlist;
-  int sizeof_matchlist;
-  int matches;
-  int textlen = strlen (text);
-  int i;
-  char *name;
-
-  sizeof_matchlist = 10;
-  matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *));
-  matches = 0;
-
-  for (i = 0; (name = enumlist[i]) != NULL; i++)
-    if (strncmp (name, text, textlen) == 0)
-      {
-	if (matches == sizeof_matchlist)
-	  {
-	    sizeof_matchlist *= 2;
-	    matchlist = (char **) xrealloc ((char *)matchlist,
-					    (sizeof_matchlist
-					     * sizeof (char *)));
-	  }
-
-	matchlist[matches] = (char *) 
-	  xmalloc (strlen (word) + strlen (name) + 1);
-	if (word == text)
-	  strcpy (matchlist[matches], name);
-	else if (word > text)
-	  {
-	    /* Return some portion of name.  */
-	    strcpy (matchlist[matches], name + (word - text));
-	  }
-	else
-	  {
-	    /* Return some of text plus name.  */
-	    strncpy (matchlist[matches], word, text - word);
-	    matchlist[matches][text - word] = '\0';
-	    strcat (matchlist[matches], name);
-	  }
-	++matches;
-      }
-
-  if (matches == 0)
-    {
-      free ((PTR)matchlist);
-      matchlist = 0;
-    }
-  else
-    {
-      matchlist = (char **) xrealloc ((char *)matchlist, ((matches + 1)
-						* sizeof (char *)));
-      matchlist[matches] = (char *) 0;
-    }
-
-  return matchlist;
-}
-
-static int
-parse_binary_operation (arg)
-     char *arg;
-{
-  int length;
-
-  if (!arg || !*arg)
-    return 1;
-
-  length = strlen (arg);
-
-  while (arg[length - 1] == ' ' || arg[length - 1] == '\t')
-    length--;
-
-  if (!strncmp (arg, "on", length)
-      || !strncmp (arg, "1", length)
-      || !strncmp (arg, "yes", length))
-    return 1;
-  else
-    if (!strncmp (arg, "off", length)
-	|| !strncmp (arg, "0", length)
-	|| !strncmp (arg, "no", length))
-      return 0;
-    else 
-      {
-	error ("\"on\" or \"off\" expected.");
-	return 0;
-      }
-}
-
-/* Do a "set" or "show" command.  ARG is NULL if no argument, or the text
-   of the argument, and FROM_TTY is nonzero if this command is being entered
-   directly by the user (i.e. these are just like any other
-   command).  C is the command list element for the command.  */
-void
-do_setshow_command (arg, from_tty, c)
-     char *arg;
-     int from_tty;
-     struct cmd_list_element *c;
-{
-  if (c->type == set_cmd)
-    {
-      switch (c->var_type)
-	{
-	case var_string:
-	  {
-	    char *new;
-	    char *p;
-	    char *q;
-	    int ch;
-	    
-	    if (arg == NULL)
-	      arg = "";
-	    new = (char *) xmalloc (strlen (arg) + 2);
-	    p = arg; q = new;
-	    while ((ch = *p++) != '\000')
-	      {
-		if (ch == '\\')
-		  {
-		    /* \ at end of argument is used after spaces
-		       so they won't be lost.  */
-		    /* This is obsolete now that we no longer strip
-		       trailing whitespace and actually, the backslash
-		       didn't get here in my test, readline or
-		       something did something funky with a backslash
-		       right before a newline.  */
-		    if (*p == 0)
-		      break;
-		    ch = parse_escape (&p);
-		    if (ch == 0)
-		      break; /* C loses */
-		    else if (ch > 0)
-		      *q++ = ch;
-		  }
-		else
-		  *q++ = ch;
-	      }
-#if 0
-	    if (*(p - 1) != '\\')
-	      *q++ = ' ';
-#endif
-	    *q++ = '\0';
-	    new = (char *) xrealloc (new, q - new);
-	    if (*(char **)c->var != NULL)
-	      free (*(char **)c->var);
-	    *(char **) c->var = new;
-	  }
-	  break;
-	case var_string_noescape:
-	  if (arg == NULL)
-	    arg = "";
-	  if (*(char **)c->var != NULL)
-	    free (*(char **)c->var);
-	  *(char **) c->var = savestring (arg, strlen (arg));
-	  break;
-	case var_filename:
-	  if (arg == NULL)
-	    error_no_arg ("filename to set it to.");
-	  if (*(char **)c->var != NULL)
-	    free (*(char **)c->var);
-	  *(char **)c->var = tilde_expand (arg);
-	  break;
-	case var_boolean:
-	  *(int *) c->var = parse_binary_operation (arg);
-	  break;
-	case var_uinteger:
-	  if (arg == NULL)
-	    error_no_arg ("integer to set it to.");
-	  *(unsigned int *) c->var = parse_and_eval_address (arg);
-	  if (*(unsigned int *) c->var == 0)
-	    *(unsigned int *) c->var = UINT_MAX;
-	  break;
-	case var_integer:
-	  {
-	    unsigned int val;
-	    if (arg == NULL)
-	      error_no_arg ("integer to set it to.");
-	    val = parse_and_eval_address (arg);
-	    if (val == 0)
-	      *(int *) c->var = INT_MAX;
-	    else if (val >= INT_MAX)
-	      error ("integer %u out of range", val);
-	    else
-	      *(int *) c->var = val;
-	    break;
-	  }
-	case var_zinteger:
-	  if (arg == NULL)
-	    error_no_arg ("integer to set it to.");
-	  *(int *) c->var = parse_and_eval_address (arg);
-	  break;
-	case var_enum:
-	  {
-	    int i;
-	    int len;
-	    int nmatches;
-	    char *match = NULL;
-	    char *p;
-
-	    /* if no argument was supplied, print an informative error message */
-	    if (arg == NULL)
-	      {
-		char msg[1024];
-		strcpy (msg, "Requires an argument. Valid arguments are ");
-		for (i = 0; c->enums[i]; i++)
-		  {
-		    if (i != 0)
-		      strcat (msg, ", ");
-		    strcat (msg, c->enums[i]);
-		  }
-		strcat (msg, ".");
-		error (msg);
-	      }
-
-	    p = strchr (arg, ' ');
-	    
-	    if (p)
-	      len = p - arg;
-	    else
-	      len = strlen (arg);
-
-	    nmatches = 0;
-	    for (i = 0; c->enums[i]; i++)
-	      if (strncmp (arg, c->enums[i], len) == 0)
-		{
-		  match = c->enums[i];
-		  nmatches++;
-		}
-
-	    if (nmatches <= 0)
-	      error ("Undefined item: \"%s\".", arg);
-
-	    if (nmatches > 1)
-	      error ("Ambiguous item \"%s\".", arg);
-
-	    *(char **)c->var = match;
-	  }
-	  break;
-	default:
-	  error ("gdb internal error: bad var_type in do_setshow_command");
-	}
-    }
-  else if (c->type == show_cmd)
-    {
-      /* Print doc minus "show" at start.  */
-      print_doc_line (gdb_stdout, c->doc + 5);
-      
-      fputs_filtered (" is ", gdb_stdout);
-      wrap_here ("    ");
-      switch (c->var_type)
-	{
-      case var_string:
-	{
-	  unsigned char *p;
-
-	  fputs_filtered ("\"", gdb_stdout);
-	  if (*(unsigned char **)c->var)
-	    for (p = *(unsigned char **) c->var; *p != '\0'; p++)
-	      gdb_printchar (*p, gdb_stdout, '"');
-	  fputs_filtered ("\"", gdb_stdout);
-	}
-	break;
-      case var_string_noescape:
-      case var_filename:
-      case var_enum:
-	fputs_filtered ("\"", gdb_stdout);
-	if (*(char **)c->var)
-	  fputs_filtered (*(char **) c->var, gdb_stdout);
-	fputs_filtered ("\"", gdb_stdout);
-	break;
-      case var_boolean:
-	fputs_filtered (*(int *) c->var ? "on" : "off", gdb_stdout);
-	break;
-      case var_uinteger:
-	if (*(unsigned int *) c->var == UINT_MAX) {
-	  fputs_filtered ("unlimited", gdb_stdout);
-	  break;
-	}
-	/* else fall through */
-      case var_zinteger:
-	fprintf_filtered (gdb_stdout, "%u", *(unsigned int *) c->var);
-	break;
-      case var_integer:
-	if (*(int *) c->var == INT_MAX)
-	  {
-	    fputs_filtered ("unlimited", gdb_stdout);
-	  }
-	else
-	  fprintf_filtered (gdb_stdout, "%d", *(int *) c->var);
-	break;
-	    
-      default:
-	error ("gdb internal error: bad var_type in do_setshow_command");
-      }
-      fputs_filtered (".\n", gdb_stdout);
-    }
-  else
-    error ("gdb internal error: bad cmd_type in do_setshow_command");
-  (*c->function.sfunc) (NULL, from_tty, c);
-}
-
-/* Show all the settings in a list of show commands.  */
-
-void
-cmd_show_list (list, from_tty, prefix)
-     struct cmd_list_element *list;
-     int from_tty;
-     char *prefix;
-{
-  for (; list != NULL; list = list->next) {
-    /* If we find a prefix, run its list, prefixing our output by its
-       prefix (with "show " skipped).  */
-    if (list->prefixlist && !list->abbrev_flag)
-      cmd_show_list (*list->prefixlist, from_tty, list->prefixname + 5);
-    if (list->type == show_cmd)
-      {
-	fputs_filtered (prefix, gdb_stdout);
-	fputs_filtered (list->name, gdb_stdout);
-	fputs_filtered (":  ", gdb_stdout);
-	do_setshow_command ((char *)NULL, from_tty, list);
-      }
-  }
-}
-
-/* ARGSUSED */
-static void
-shell_escape (arg, from_tty)
-     char *arg;
-     int from_tty;
-{
-#ifdef CANT_FORK
-  /* FIXME: what about errors (I don't know how GO32 system() handles
-     them)?  */
-  system (arg);
-#else /* Can fork.  */
-  int rc, status, pid;
-  char *p, *user_shell;
-
-  if ((user_shell = (char *) getenv ("SHELL")) == NULL)
-    user_shell = "/bin/sh";
-
-  /* Get the name of the shell for arg0 */
-  if ((p = strrchr (user_shell, '/')) == NULL)
-    p = user_shell;
-  else
-    p++;			/* Get past '/' */
-
-  if ((pid = fork()) == 0)
-    {
-      if (!arg)
-	execl (user_shell, p, 0);
-      else
-	execl (user_shell, p, "-c", arg, 0);
-
-      fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", user_shell,
-			  safe_strerror (errno));
-      gdb_flush (gdb_stderr);
-      _exit (0177);
-    }
-
-  if (pid != -1)
-    while ((rc = wait (&status)) != pid && rc != -1)
-      ;
-  else
-    error ("Fork failed");
-#endif /* Can fork.  */
-}
-
-static void
-make_command (arg, from_tty)
-     char *arg;
-     int from_tty;
-{
-  char *p;
-
-  if (arg == 0)
-    p = "make";
-  else
-    {
-      p = xmalloc (sizeof("make ") + strlen(arg));
-      strcpy (p, "make ");
-      strcpy (p + sizeof("make ")-1, arg);
-    }
-  
-  shell_escape (p, from_tty);
-}
-
-static void
-show_user_1 (c, stream)
-     struct cmd_list_element *c;
-     GDB_FILE *stream;
-{
-  register struct command_line *cmdlines;
-
-  cmdlines = c->user_commands;
-  if (!cmdlines)
-    return;
-  fputs_filtered ("User command ", stream);
-  fputs_filtered (c->name, stream);
-  fputs_filtered (":\n", stream);
-
-  while (cmdlines)
-    {
-      print_command_line (cmdlines, 4);
-      cmdlines = cmdlines->next;
-    }
-  fputs_filtered ("\n", stream);
-}
-
-/* ARGSUSED */
-static void
-show_user (args, from_tty)
-     char *args;
-     int from_tty;
-{
-  struct cmd_list_element *c;
-  extern struct cmd_list_element *cmdlist;
-
-  if (args)
-    {
-      c = lookup_cmd (&args, cmdlist, "", 0, 1);
-      if (c->class != class_user)
-	error ("Not a user command.");
-      show_user_1 (c, gdb_stdout);
-    }
-  else
-    {
-      for (c = cmdlist; c; c = c->next)
-	{
-	  if (c->class == class_user)
-	    show_user_1 (c, gdb_stdout);
-	}
-    }
-}
-
-void
-_initialize_command ()
-{
-  add_com ("shell", class_support, shell_escape,
-	   "Execute the rest of the line as a shell command.  \n\
-With no arguments, run an inferior shell.");
-
-  if (xdb_commands)
-    add_com_alias("!", "shell", class_support, 0);
-
-  add_com ("make", class_support, make_command,
-	   "Run the ``make'' program using the rest of the line as arguments.");
-  add_cmd ("user", no_class, show_user, 
-	   "Show definitions of user defined commands.\n\
-Argument is the name of the user defined command.\n\
-With no argument, show definitions of all user defined commands.", &showlist);
-}