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octave-2.09
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fn-cache.h
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1996-10-26
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/*
Copyright (C) 1996 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.
*/
#if !defined (octave_fn_cache_h)
#define octave_fn_cache_h 1
#include <ctime>
#include <string>
#include "Map.h"
class string_vector;
// XXX FIXME XXX -- this should maybe be nested in the
// octave_fcn_file_name_cache class...
class
file_name_cache_elt
{
public:
file_name_cache_elt (void)
: timestamp (0), fcn_file_names (), fcn_file_names_no_suffix ()
{ update (string ()); }
file_name_cache_elt (const string& dir_name)
: timestamp (0), fcn_file_names (), fcn_file_names_no_suffix ()
{ update (dir_name); }
file_name_cache_elt (const file_name_cache_elt& elt)
{
timestamp = elt.timestamp;
fcn_file_names = elt.fcn_file_names;
fcn_file_names_no_suffix = elt.fcn_file_names_no_suffix;
}
file_name_cache_elt& operator = (const file_name_cache_elt& elt)
{
if (&elt != this)
{
timestamp = elt.timestamp;
fcn_file_names = elt.fcn_file_names;
fcn_file_names_no_suffix = elt.fcn_file_names_no_suffix;
}
return *this;
}
~file_name_cache_elt (void) { }
int length (void) { return fcn_file_names.length (); }
bool update (const string& dir_name);
// The time we last read this directory.
time_t timestamp;
// The list of file names in this directory.
string_vector fcn_file_names;
// The list of file names in this directory without the .m or .oct
// suffixes.
string_vector fcn_file_names_no_suffix;
};
class
octave_fcn_file_name_cache
{
protected:
octave_fcn_file_name_cache (void)
: cache (file_name_cache_elt ())
{ update (string ()); }
public:
~octave_fcn_file_name_cache (void) { }
bool update (const string& path);
static string_vector list (bool no_suffix = false)
{ return list (string (), no_suffix); }
static string_vector list (const string& path, bool no_suffix = false);
static string_vector list_no_suffix (void)
{ return list (true); }
static string_vector list_no_suffix (const string& path)
{ return list (path, true); }
private:
static octave_fcn_file_name_cache* instance;
// An associative array of all the directory names in the load path
// and the corresponding cache elements.
CHMap<file_name_cache_elt> cache;
string_vector do_list (const string& path, bool no_suffix);
};
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/