/*

Copyright (C) 1996, 1997 John W. Eaton

This file is part of Octave.

Octave 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.

Octave 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 Octave; see the file COPYING.  If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <csignal>
#include <cstdlib>
#include <cstring>

#include <string>

#include <iostream.h>
#include <fstream.h>
#include <strstream.h>

#ifdef HAVE_UNISTD_H
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <unistd.h>
#endif

#include "cmd-edit.h"
#include "file-ops.h"
#include "oct-env.h"
#include "str-vec.h"

#include <defaults.h>
#include "defun.h"
#include "dirfns.h"
#include "error.h"
#include "fn-cache.h"
#include "gripes.h"
#include "help.h"
#include "input.h"
#include "oct-obj.h"
#include "ov-usr-fcn.h"
#include "pager.h"
#include "parse.h"
#include "pathsearch.h"
#include "procstream.h"
#include "pt-pr-code.h"
#include "sighandlers.h"
#include "symtab.h"
#include "syswait.h"
#include "toplev.h"
#include "unwind-prot.h"
#include "utils.h"
#include "variables.h"
#include "version.h"

// Name of the info file specified on command line.
// (--info-file file)
string Vinfo_file;

// Name of the info reader we'd like to use.
// (--info-program program)
string Vinfo_prog;

// If TRUE, don't print additional help message in help and usage
// functions.
static bool Vsuppress_verbose_help_message;

// XXX FIXME XXX -- maybe this should use string instead of char*.

struct help_list
{
  const char *name;
  const char *help;
};

static help_list operators[] =
{
  { "!",
    "Logical not operator.  See also `~'.\n", },

  { "!=",
    "Logical not equals operator.  See also `~' and `<>'.\n", },

  { "\"",
    "String delimiter.\n", },

  { "#",
    "Begin comment character.  See also `%'.", },

  { "%",
    "Begin comment charcter.  See also `#'.", },

  { "&",
    "Logical and operator.  See also `&&'.", },

  { "&&",
    "Logical and operator.  See also `&'.", },

  { "'",
    "Matrix transpose operator.  For complex matrices, computes the\n\
complex conjugate (Hermitian) transpose.  See also `.''\n\
\n\
The single quote character may also be used to delimit strings, but\n\
it is better to use the double quote character, since that is never\n\
ambiguous", },

  { "(",
    "Array index or function argument delimiter.", },

  { ")",
    "Array index or function argument delimiter.", },

  { "*",
    "Multiplication operator.  See also `.*'", },

  { "**",
    "Power operator.  See also `^', `.**', and `.^'", },

  { "+",
    "Addition operator.", },

  { "++",
    "Increment operator.  As in C, may be applied as a prefix or postfix operator.", },

  { ",",
    "Array index, function argument, or command separator.", },

  { "-",
    "Subtraction or unary negation operator.", },

  { "--",
    "Decrement operator.  As in C, may be applied as a prefix or postfix operator.", },

  { ".'",
    "Matrix transpose operator.  For complex matrices, computes the\n\
transpose, *not* the complex conjugate transpose.  See also `''.", },

  { ".*",
    "Element by element multiplication operator.  See also `*'.", },

  { ".**",
    "Element by element power operator.  See also `**', `^', and `.^'.", },

  { "./",
    "Element by element division operator.  See also `/' and `\\'.", },

  { ".^",
    "Element by element power operator.  See also `**', `^', and `.^'.", },

  { "/",
    "Right division.  See also `\\' and `./'.", },

  { ":",
    "Select entire rows or columns of matrices.", },

  { ";",
    "Array row or command separator.  See also `,'.", },

  { "<",
    "Less than operator.", },

  { "<=",
    "Less than or equals operator.", },

  { "<>",
    "Logical not equals operator.  See also `!=' and `~='.", },

  { "=",
    "Assignment operator.", },

  { "==",
    "Equality test operator.", },

  { ">",
    "Greater than operator.", },

  { ">=",
    "Greater than or equals operator.", },

  { "[",
    "Return list delimiter.  See also `]'.", },

  { "\\",
    "Left division operator.  See also `/' and `./'.", },

  { "]",
    "Return list delimiter.  See also `['.", },

  { "^",
    "Power operator.  See also `**', `.^', and `.**.'", },

  { "|",
    "Logical or operator.  See also `||'.", },

  { "||",
    "Logical or operator.  See also `|'.", },

  { "~",
    "Logical not operator.  See also `!' and `~'.", },

  { "~=",
    "Logical not equals operator.  See also `<>' and `!='.", },

  { 0, 0, },
};

static help_list keywords[] =
{
  { "all_va_args",
    "Pass all unnamed arguments to another function call.", },

  { "break",
    "Exit the innermost enclosing while or for loop.", },

  { "catch",
    "begin the cleanup part of a try-catch block", },

  { "continue",
    "Jump to the end of the innermost enclosing while or for loop.", },

  { "else",
    "Alternate action for an if block.", },

  { "elseif",
    "Alternate conditional test for an if block.", },

  { "end",
    "Mark the end of any for, if, while, or function block.", },

  { "end_try_catch",
    "Mark the end of an try-catch block.", }, 

  { "end_unwind_protect",
    "Mark the end of an unwind_protect block.", }, 

  { "endfor",
    "Mark the end of a for loop.", },

  { "endfunction",
    "Mark the end of a function.", },

  { "endif",
    "Mark the end of an if block.", },

  { "endwhile",
    "Mark the end of a while loop.", },

  { "for",
    "Begin a for loop.", },

  { "function",
    "Begin a function body.", },

  { "global",
    "Declare variables to have global scope.", },

  { "gplot",
    "Produce 2-D plots using gnuplot-like command syntax.", },

  { "gsplot",
    "Produce 3-D plots using gnuplot-like command syntax.", },

  { "if",
    "Begin an if block.", },

  { "return",
    "Return from a function.", },

  { "try",
    "Begin a try-catch block.", }, 

  { "unwind_protect",
    "Begin an unwind_protect block.", }, 

  { "unwind_protect_cleanup",
    "Begin the cleanup section of an unwind_protect block.", }, 

  { "while",
    "Begin a while loop.", },

  { 0, 0, },
};

// Return a copy of the operator or keyword names.

static string_vector
names (help_list *lst)
{
  string_vector retval;

  int count = 0;
  help_list *ptr = lst;
  while (ptr->name)
    {
      count++;
      ptr++;
    }

  if (count > 0)
    {
      retval.resize (count);

      ptr = lst;
      for (int i = 0; i < count; i++)
	{
	  retval[i] = ptr->name;
	  ptr++;
	}
    }

  return retval;
}

static help_list *
operator_help (void)
{
  return operators;
}

static help_list *
keyword_help (void)
{
  return keywords;
}

// It's not likely that this does the right thing now.  XXX FIXME XXX

string_vector
make_name_list (void)
{
  string_vector key = names (keyword_help ());
  int key_len = key.length ();

  string_vector glb = global_sym_tab->name_list ();
  int glb_len = glb.length ();

  string_vector top = top_level_sym_tab->name_list ();
  int top_len = top.length ();

  string_vector lcl;
  if (top_level_sym_tab != curr_sym_tab)
    lcl = curr_sym_tab->name_list ();
  int lcl_len = lcl.length ();

  string_vector ffl = octave_fcn_file_name_cache::list_no_suffix ();
  int ffl_len = ffl.length ();

  int total_len = key_len + glb_len + top_len + lcl_len + ffl_len;

  string_vector list (total_len);

  // Put all the symbols in one big list.

  int j = 0;
  int i = 0;
  for (i = 0; i < key_len; i++)
    list[j++] = key[i];

  for (i = 0; i < glb_len; i++)
    list[j++] = glb[i];

  for (i = 0; i < top_len; i++)
    list[j++] = top[i];

  for (i = 0; i < lcl_len; i++)
    list[j++] = lcl[i];

  for (i = 0; i < ffl_len; i++)
    list[j++] = ffl[i];

  return list;
}

void
additional_help_message (ostream& os)
{
  if (! Vsuppress_verbose_help_message)
    os << "\n\
Additional help for built-in functions, operators, and variables\n\
is available in the on-line version of the manual.  Use the command\n\
`help -i <topic>' to search the manual index.\n\
\n\
Help and information about Octave is also available on the WWW\n\
at http://www.che.wisc.edu/octave/octave.html and via the\n\
help-octave@bevo.che.wisc.edu mailing list.\n";
}

// XXX FIXME XXX -- this needs a major overhaul to cope with new
// symbol table stuff.

static void
display_names_from_help_list (ostream& os, help_list *list,
			      const char *desc)
{
  string_vector symbols = names (list);

  if (! symbols.empty ())
    {
      os << "\n*** " << desc << ":\n\n";

      symbols.qsort ();

      symbols.list_in_columns (os);
    }
}

static void
display_symtab_names (ostream& os, const string_vector& names,
		      const string& desc)
{
  if (! names.empty ())
    {
      os << "\n*** " << desc << ":\n\n";
      names.list_in_columns (os);
    }
}

#ifdef LIST_SYMBOLS
#undef LIST_SYMBOLS
#endif
#define LIST_SYMBOLS(type, msg) \
  do \
    { \
      string_vector names \
	= global_sym_tab->name_list (string_vector (), true, type); \
      display_symtab_names (octave_stdout, names, msg); \
    } \
  while (0)

static void
simple_help (void)
{
  octave_stdout << "Help is available for the topics listed below.\n";

  additional_help_message (octave_stdout);

  display_names_from_help_list (octave_stdout, operator_help (),
				"operators");

  display_names_from_help_list (octave_stdout, keyword_help (),
				"reserved words");

  // XXX FIXME XXX -- is this distinction needed?

  LIST_SYMBOLS (symbol_record::BUILTIN_CONSTANT, "built-in constants");

  LIST_SYMBOLS (symbol_record::BUILTIN_VARIABLE, "built-in variables");

  LIST_SYMBOLS (symbol_record::TEXT_FUNCTION,
		"text functions (these names are also reserved)");

  LIST_SYMBOLS (symbol_record::MAPPER_FUNCTION, "mapper functions");

  LIST_SYMBOLS (symbol_record::BUILTIN_FUNCTION, "general functions");

  // Also need to list variables and currently compiled functions from
  // the symbol table, if there are any.

  // Also need to search octave_path for script files.

  string_vector dirs = Vload_path_dir_path.all_directories ();

  int len = dirs.length ();

  for (int i = 0; i < len; i++)
    {
      string_vector names = octave_fcn_file_name_cache::list (dirs[i]);

      if (! names.empty ())
	{
	  string dir
	    = octave_env::make_absolute (dirs[i], octave_env::getcwd ());

	  octave_stdout << "\n*** function files in " << dir << ":\n\n";

	  names.qsort ();

	  names.list_in_columns (octave_stdout);
	}
    }
}

static int
try_info (const string& nm)
{
  int status = 0;

  static char *cmd_str = 0;

  delete [] cmd_str;
  cmd_str = 0;

  ostrstream cmd_buf;

  cmd_buf << Vinfo_prog << " --file " << Vinfo_file;

  string directory_name = Vinfo_file;
  size_t pos = directory_name.rfind ('/');

  if (pos != NPOS)
    {
      directory_name.resize (pos + 1);
      cmd_buf << " --directory " << directory_name;
    }

  if (nm.length () > 0)
    cmd_buf << " --index-search " << nm;

  cmd_buf << ends;

  cmd_str = cmd_buf.str ();

  volatile octave_interrupt_handler old_interrupt_handler
    = octave_ignore_interrupts ();

  status = system (cmd_str);

  octave_set_interrupt_handler (old_interrupt_handler);

  if (WIFEXITED (status))
    status = WEXITSTATUS (status);
  else
    status = 127;

  return status;
}

static void
help_from_info (const string_vector& argv, int idx, int argc)
{
  if (idx == argc)
    try_info (string ());
  else
    {
      for (int i = idx; i < argc; i++)
	{
	  int status = try_info (argv[i]);

	  if (status)
	    {
	      if (status == 127)
		{
		  error ("help: unable to find info");
		  error ("help: you need info 2.18 or later (texinfo 3.12)");
		  break;
		}
	      else
		{
		  message ("help", "sorry, `%s' is not indexed in the manual",
			   argv[i].c_str ());
		}
	    }
	}
    }
}

static bool
looks_like_texinfo (const string& msg, size_t& p1)
{
  p1 = msg.find ('\n');

  string t = msg.substr (0, p1);

  if (p1 == NPOS)
    p1 = 0;

  size_t p2 = t.find ("-*- texinfo -*-");

  return (p2 != NPOS);
}

void
display_help_text (ostream& os, const string& msg)
{
  // Look for "-*- texinfo -*-" in first line of help message.  If it
  // is present, use makeinfo to format the rest of the message before
  // sending it to the output stream.  Otherwise, just print the
  // message.

  size_t pos;

  if (looks_like_texinfo (msg, pos))
    {
      string tmp_file_name = file_ops::tempnam ("", "");

      int cols = command_editor::terminal_cols ();

      if (cols > 16)
	cols--;

      if (cols > 64)
	cols -= 7;

      if (cols > 80)
	cols = 72;

      ostrstream buf;
      buf << "sed 's/^[#%]+ *//' | makeinfo"
	  << " -D \"VERSION " << OCTAVE_VERSION << "\""
	  << " -D \"OCTAVEHOME " << OCTAVE_PREFIX << "\""
	  << " -D \"TARGETHOSTTYPE " << CANONICAL_HOST_TYPE << "\""
	  << " --fill-column " << cols
	  << " --no-warn"
	  << " --no-validate"
	  << " --no-headers"
	  << " --force"
	  << " --output " << tmp_file_name
	  << " > /dev/null 2>&1"
	  << ends;

      char *cmd = buf.str ();

      oprocstream filter (cmd);

      delete [] cmd;

      if (filter)
	{
	  filter << msg.substr (pos+1);

	  filter.close ();

	  ifstream tmp_file (tmp_file_name.c_str ());

	  int c;
	  while ((c = tmp_file.get ()) != EOF)
	    os << (char) c;

	  tmp_file.close ();

	  file_ops::unlink (tmp_file_name);
	}
      else
	os << msg;
    }
  else
    os << msg;
}

static bool
help_from_list (ostream& os, const help_list *list,
		const string& nm, int usage)
{
  const char *name;

  while ((name = list->name) != 0)
    {
      if (strcmp (name, nm.c_str ()) == 0)
	{
	  if (usage)
	    os << "\nusage: ";
	  else
	    {
	      os << "\n*** " << nm << ":\n\n";
	    }

	  display_help_text (os, list->help);

	  os << "\n";

	  return true;
	}
      list++;
    }

  return false;
}

static bool
help_from_symbol_table (ostream& os, const string& nm)
{
  bool retval = false;

  symbol_record *sym_rec = lookup_by_name (nm, 0);

  if (sym_rec && sym_rec->is_defined ())
    {
      string h = sym_rec->help ();

      if (h.length () > 0)
	{
	  sym_rec->which (os);
	  os << "\n";
	  display_help_text (os, h);
	  os << "\n";
	  retval = true;
	}
    }

  return retval;
}

static bool
help_from_file (ostream& os, const string& nm)
{
  bool retval = false;

  string path = fcn_file_in_path (nm);

  string h = get_help_from_file (path);

  if (! h.empty ())
    {
      os << nm << " is the file: " << path << "\n\n";
      display_help_text (os, h);
      os << "\n";
      retval = true;
    }

  return retval;
}

static void
builtin_help (int argc, const string_vector& argv)
{
  help_list *op_help_list = operator_help ();
  help_list *kw_help_list = keyword_help ();

  for (int i = 1; i < argc; i++)
    {
      if (help_from_list (octave_stdout, op_help_list, argv[i], 0))
	continue;

      if (help_from_list (octave_stdout, kw_help_list, argv[i], 0))
	continue;

      if (help_from_symbol_table (octave_stdout, argv[i]))
	continue;

      if (help_from_file (octave_stdout, argv[i]))
	continue;

      octave_stdout << "\nhelp: sorry, `" << argv[i]
		    << "' is not documented\n"; 
    }

  additional_help_message (octave_stdout);
}

DEFUN_TEXT (help, args, ,
  "-*- texinfo -*-\n\
@deffn {Command} help\n\
Octave's @code{help} command can be used to print brief usage-style\n\
messages, or to display information directly from an on-line version of\n\
the printed manual, using the GNU Info browser.  If invoked without any\n\
arguments, @code{help} prints a list of all the available operators,\n\
functions, and built-in variables.  If the first argument is @code{-i},\n\
the @code{help} command searches the index of the on-line version of\n\
this manual for the given topics.\n\
\n\
For example, the command @kbd{help help} prints a short message\n\
describing the @code{help} command, and @kbd{help -i help} starts the\n\
GNU Info browser at this node in the on-line version of the manual.\n\
\n\
Once the GNU Info browser is running, help for using it is available\n\
using the command @kbd{C-h}.\n\
@end deffn")
{
  octave_value_list retval;

  int argc = args.length () + 1;

  string_vector argv = args.make_argv ("help");

  if (error_state)
    return retval;

  if (argc == 1)
    simple_help ();
  else
    {
      if (argv[1] == "-i")
	help_from_info (argv, 2, argc);
      else
	builtin_help (argc, argv);
    }

  return retval;
}

static void
do_type (ostream& os, const string& name, bool pr_type_info,
	 bool quiet, bool pr_orig_txt)
{
  symbol_record *sym_rec = lookup_by_name (name, 0);

  if (sym_rec && sym_rec->is_defined ())
    {
      if (sym_rec->is_user_function ())
	{
	  octave_value tmp = sym_rec->def ();
		  
	  octave_function *defn = tmp.function_value ();

	  string fn = defn ? defn->fcn_file_name () : string ();

	  if (pr_orig_txt && ! fn.empty ())
	    {
	      ifstream fs (fn.c_str (), ios::in);

	      if (fs)
		{
		  if (pr_type_info && ! quiet)
		    os << name << " is the function defined from: "
		       << fn << "\n\n";

		  char ch;

		  while (fs.get (ch))
		    os << ch;
		}
	      else
		os << "unable to open `" << fn << "' for reading!\n";
	    }
	  else
	    {
	      if (pr_type_info && ! quiet)
		os << name << " is a user-defined function:\n\n";

	      tree_print_code tpc (os, "", pr_orig_txt);

	      defn->accept (tpc);
	    }
	}

      // XXX FIXME XXX -- this code should be shared with
      // Fwhich.

      else if (sym_rec->is_text_function ())
	os << name << " is a built-in text-function\n";
      else if (sym_rec->is_builtin_function ())
	os << name << " is a built-in function\n";
      else if (sym_rec->is_user_variable ()
	       || sym_rec->is_builtin_variable ()
	       || sym_rec->is_builtin_constant ())
	{
	  octave_value defn = sym_rec->def ();

	  int var_ok = 1;

	  if (! error_state)
	    {
	      if (pr_type_info && ! quiet)
		{
		  if (var_ok)
		    {
		      os << name;

		      if (sym_rec->is_user_variable ())
			os << " is a user-defined variable\n";
		      else if (sym_rec->is_builtin_variable ())
			os << " is a built-in variable\n";
		      else if (sym_rec->is_builtin_constant ())
			os << " is a built-in constant\n";
		      else
			panic_impossible ();
		    }
		  else
		    os << "type: `" << name << "' has unknown type!\n";
		}

	      defn.print_raw (os, true);

	      if (pr_type_info)
		os << "\n";
	    }
	}
      else
	error ("type: `%s' has unknown type!", name.c_str ());
    }
  else
    {
      string ff = fcn_file_in_path (name);

      if (! ff.empty ())
	{
	  ifstream fs (ff.c_str (), ios::in);

	  if (fs)
	    {
	      if (pr_type_info && ! quiet)
		os << name << " is the script file: " << ff << "\n\n";

	      char ch;

	      while (fs.get (ch))
		os << ch;
	    }
	  else
	    os << "unable to open `" << ff << "' for reading!\n";
	}
      else
	error ("type: `%s' undefined", name.c_str ());
    }
}

DEFUN_TEXT (type, args, nargout,
  "type NAME\n\
\n\
display the definition of each NAME that refers to a function")
{
  octave_value_list retval;

  unwind_protect::begin_frame ("Ftype");

  int argc = args.length () + 1;

  string_vector argv = args.make_argv ("type");

  if (! error_state)
    {
      if (argc > 1)
	{
	  // XXX FIXME XXX -- we should really use getopt ()

	  bool quiet = false;
	  bool pr_orig_txt = true;

	  int idx;

	  for (idx = 1; idx < argc; idx++)
	    {
	      if (argv[idx] == "-q" || argv[idx] == "-quiet")
		quiet = true;
	      else if (argv[idx] == "-t" || argv[idx] == "-transformed")
		pr_orig_txt = false;
	      else
		break;
	    }

	  if (idx < argc)
	    {
	      ostrstream output_buf;

	      for (int i = idx; i < argc; i++)
		{
		  string id = argv[i];

		  if (nargout == 0)
		    do_type (octave_stdout, id, true, quiet, pr_orig_txt);
		  else
		    do_type (output_buf, id, false, quiet, pr_orig_txt);

		  if (error_state)
		    goto abort;
		}

	      if (nargout == 0)
		{
		  output_buf << ends;

		  char *s = output_buf.str ();

		  retval = s;

		  delete [] s;
		}
	    }
	  else
	    print_usage ("type");
	}
      else
	print_usage ("type");
    }

 abort:

  return retval;
}

static string
do_which (const string& name)
{
  string retval;

  symbol_record *sym_rec = lookup_by_name (name, 0);

  if (sym_rec && sym_rec->is_defined ())
    retval = sym_rec->which ();
  else
    {
      string path = fcn_file_in_path (name);

      if (! path.empty ())
	retval = path;
      else
	retval = "undefined";
    }

  return retval;
}

static void
do_which (ostream& os, const string& name)
{
  symbol_record *sym_rec = lookup_by_name (name, 0);

  if (sym_rec && sym_rec->is_defined ())
    sym_rec->which (os);
  else
    {
      string path = fcn_file_in_path (name);

      if (! path.empty ())
	os << "which: `" << name << "' is the script file\n"
	   << path << "\n";
      else
	os << "which: `" << name << "' is undefined\n";
    }
}

DEFUN_TEXT (which, args, nargout,
  "which NAME ...\n\
\n\
display the type of each NAME.  If NAME is defined from an function\n\
file, print the full name of the file.")
{
  octave_value_list retval;

  string_vector argv = args.make_argv ("which");

  if (! error_state)
    {
      int argc = argv.length ();

      if (nargout > 0)
	retval.resize (argc-1, Matrix ());

      if (argc > 1)
	{
	  for (int i = 1; i < argc; i++)
	    {
	      string id = argv[i];

	      if (nargout == 0)
		do_which (octave_stdout, id);
	      else
		retval(i-1) = do_which (id);
	    }
	}
      else
	print_usage (argv[0]);
    }

  return retval;
}

static int
info_file (void)
{
  int status = 0;

  string s = builtin_string_variable ("INFO_FILE");

  if (s.empty ())
    {
      gripe_invalid_value_specified ("INFO_FILE");
      status = -1;
    }
  else
    Vinfo_file = s;

  return status;
}

static int
info_prog (void)
{
  int status = 0;

  string s = builtin_string_variable ("INFO_PROGRAM");

  if (s.empty ())
    {
      gripe_invalid_value_specified ("INFO_PROGRAM");
      status = -1;
    }
  else
    Vinfo_prog = s;

  return status;
}

static int
suppress_verbose_help_message (void)
{
  Vsuppress_verbose_help_message
    = check_preference ("suppress_verbose_help_message");

  return 0;
}

void
symbols_of_help (void)
{
  DEFVAR (INFO_FILE, Vinfo_file, info_file,
    "-*- texinfo -*-\n\
@defvr {Built-in Variable} INFO_FILE\n\
The variable @code{INFO_FILE} names the location of the Octave info file.\n\
The default value is @code{\"@var{octave-home}/info/octave.info\"}, where\n\
@var{octave-home} is the directory where all of Octave is installed.\n\
@end defvr");

  DEFVAR (INFO_PROGRAM, Vinfo_prog, info_prog,
    "-*- texinfo -*-\n\
@defvr {Built-in Variable} INFO_FILE\n\
The variable @code{INFO_FILE} names the location of the Octave info file.\n\
The default value is @code{\"@var{octave-home}/info/octave.info\"}, where\n\
@var{octave-home} is the directory where all of Octave is installed.\n\
@end defvr");

  DEFVAR (suppress_verbose_help_message, 0.0, suppress_verbose_help_message,
    "-*- texinfo -*-\n\
@defvr {Built-in Variable} suppress_verbose_help_message\n\
If the value of @code{suppress_verbose_help_message} is nonzero, Octave\n\
will not add additional help information to the end of the output from\n\
the @code{help} command and usage messages for built-in commands.\n\
@end defvr");

}

/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/