block_ex.c 2.79 KB
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/*
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	Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2016
	Copyright Stichting C.A. Muller Radioastronomiestation, 2016
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	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 3 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, see <http://www.gnu.org/licenses/>.

 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <controller/controller_block.h>
#include <log/log.h>

/*
       inputs      outputs
       nr name     nr name

     ----------------------
     |                    |
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  ---| 0  a          0 qa |----
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     |	                  |
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  ---| 1  b          1 qb |----
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     |	                  |
     ----------------------
     
 */

struct io {
	bool q;
	bool *i;
};

struct controller_block_private {
	struct io io[0];
};

static void calculate_2(struct controller_block *block)
{
	struct controller_block_private *priv = block->private;

	priv->io[0].q = *priv->io[0].i & !(*priv->io[1].i);
	priv->io[1].q = *priv->io[1].i & !(*priv->io[0].i);
}


static struct controller_block_interm_list interms_2[] = {
	{ "a", CONTROLLER_BLOCK_TERM_BOOL, offsetof(struct controller_block_private, io[0].i) },
	{ "b", CONTROLLER_BLOCK_TERM_BOOL, offsetof(struct controller_block_private, io[1].i) },
	{ NULL }
};


static struct controller_block_outterm_list outterms_2[] = {
	{ "qa", CONTROLLER_BLOCK_TERM_BOOL, offsetof(struct controller_block_private, io[0].q) },
	{ "qb", CONTROLLER_BLOCK_TERM_BOOL, offsetof(struct controller_block_private, io[1].q) },
	{ NULL }
};


static struct controller_block * block_ex(struct controller_block *block)
{
	if (controller_block_add(block))
		goto err_block;
	
	return block;

err_block:
	controller_block_free(block);
	return NULL;
}

static struct controller_block *block_err(struct controller_block *block)
{
	controller_block_free(block);
	return NULL;
}

static struct controller_block * block_ex2_create(char *name, int argc, va_list val)
{
	struct controller_block *block;
	
	if (!(block = controller_block_alloc("ex2", name, sizeof(struct controller_block_private) + sizeof(bool *) * 2)))
		return NULL;

	if (controller_block_interm_list_init(block, interms_2))
		return block_err(block);

	if (controller_block_outterm_list_init(block, outterms_2))
		return block_err(block);

	block->calculate = calculate_2;
	
	return block_ex(block);
}

BLOCK_CREATE(ex2) = {
	.create = block_ex2_create,
	.args = { NULL },
};