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/***************************************************************************
* File: shuffle.c
* Auth: Iain Mott [iain.mott@bigpond.com]
* Maintainer: Iain Mott [iain.mott@bigpond.com]
* Version: Part of motex_1.1.2
* Date: January 2001
*
* Description: Pd external. Sends value of an environment variable argument on bang.
* Use a 'set <NAME>' message to reset the variable name.
* See supporting Pd patch: getenv.pd
*
* Copyright (C) 2001 by Iain Mott [iain.mott@bigpond.com]
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License, which should be included with this
* program, for more details.
*
****************************************************************************/
/*
* getenv - Pd external. Copyright (c) 2001 Iain Mott
* sends value of an environment variable argument on bang
* use a 'set <NAME>' message to reset the variable name
*/
#include "m_pd.h"
#include <stdlib.h>
static t_class *getenv_class;
typedef struct _getenv
{
t_object x_obj;
t_symbol *enval;
char *envar;
} t_getenv;
static void *getenv_new(t_symbol *s, int argc, t_atom *argv)
{
t_getenv *x = (t_getenv *)pd_new(getenv_class);
x->envar = NULL;
if(argc != 1 || argv[0].a_type != A_SYMBOL)
post("getenv: One argument (environment variable) required");
else
{
char *value = getenv(argv[0].a_w.w_symbol->s_name);
if(value)
{
x->envar = argv[0].a_w.w_symbol->s_name;
x->enval = gensym(value);
}
else
post("getenv: Environment variable does not exist");
}
outlet_new(&x->x_obj, &s_symbol);
return (x);
}
void getenv_set(t_getenv *x, t_symbol *f)
{
char *value = getenv(f->s_name);
if(value)
x->enval = gensym(value);
else
post("getenv: Environment variable does not exist");
}
void getenv_bang(t_getenv *x)
{
if(x->envar)
outlet_symbol(x->x_obj.ob_outlet, x->enval);
}
void getenv_setup(void)
{
getenv_class = class_new(gensym("getenv"), (t_newmethod)getenv_new, 0, sizeof(t_getenv), 0, A_GIMME, 0);
class_addmethod(getenv_class, (t_method)getenv_set, gensym("set"), A_SYMBOL, 0);
class_addbang(getenv_class, getenv_bang);
}
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