[libsigrokdecode.git] / type_logic.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2012 Bert Vermeulen <bert@biot.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 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 "sigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include "config.h"
#include <inttypes.h>
#include <string.h>

static PyObject *srd_logic_iter(PyObject *self)
{
	return self;
}

static PyObject *srd_logic_iternext(PyObject *self)
{
	int i;
	PyObject *py_samplenum, *py_samples;
	srd_logic *logic;
	uint64_t sample;
	uint8_t probe_samples[SRD_MAX_NUM_PROBES + 1];

	logic = (srd_logic *)self;
	if (logic->itercnt >= logic->inbuflen / logic->di->data_unitsize) {
		/* End iteration loop. */
		return NULL;
	}

	/*
	 * Convert the bit-packed sample to an array of bytes, with only 0x01
	 * and 0x00 values, so the PD doesn't need to do any bitshifting.
	 */
	memcpy(&sample,
	       logic->inbuf + logic->itercnt * logic->di->data_unitsize,
	       logic->di->data_unitsize);
	for (i = 0; i < logic->di->dec_num_probes; i++)
		probe_samples[i] = sample & (1 << logic->di->dec_probemap[i]) ? 1 : 0;

	/* Prepare the next samplenum/sample list in this iteration. */
	py_samplenum =
	    PyLong_FromUnsignedLongLong(logic->start_samplenum +
					logic->itercnt);
	PyList_SetItem(logic->sample, 0, py_samplenum);
	py_samples = PyBytes_FromStringAndSize((const char *)probe_samples,
					       logic->di->dec_num_probes);
	PyList_SetItem(logic->sample, 1, py_samples);
	Py_INCREF(logic->sample);
	logic->itercnt++;

	return logic->sample;
}

SRD_PRIV PyTypeObject srd_logic_type = {
	PyVarObject_HEAD_INIT(NULL, 0)
	.tp_name = "srd_logic",
	.tp_basicsize = sizeof(srd_logic),
	.tp_flags = Py_TPFLAGS_DEFAULT,
	.tp_doc = "Sigrokdecode logic sample object",
	.tp_iter = srd_logic_iter,
	.tp_iternext = srd_logic_iternext,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include "sigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
	21	#include "config.h"
	22	#include <inttypes.h>
	23	#include <string.h>
	24
	25	static PyObject srd_logic_iter(PyObject self)
	26	{
	27	return self;
	28	}
	29
	30	static PyObject srd_logic_iternext(PyObject self)
	31	{
	32	int i;
	33	PyObject py_samplenum, py_samples;
	34	srd_logic *logic;
	35	uint64_t sample;
	36	uint8_t probe_samples[SRD_MAX_NUM_PROBES + 1];
	37
	38	logic = (srd_logic *)self;
	39	if (logic->itercnt >= logic->inbuflen / logic->di->data_unitsize) {
	40	/* End iteration loop. */
	41	return NULL;
	42	}
	43
	44	/*
	45	* Convert the bit-packed sample to an array of bytes, with only 0x01
	46	* and 0x00 values, so the PD doesn't need to do any bitshifting.
	47	*/
	48	memcpy(&sample,
	49	logic->inbuf + logic->itercnt * logic->di->data_unitsize,
	50	logic->di->data_unitsize);
	51	for (i = 0; i < logic->di->dec_num_probes; i++)
	52	probe_samples[i] = sample & (1 << logic->di->dec_probemap[i]) ? 1 : 0;
	53
	54	/* Prepare the next samplenum/sample list in this iteration. */
	55	py_samplenum =
	56	PyLong_FromUnsignedLongLong(logic->start_samplenum +
	57	logic->itercnt);
	58	PyList_SetItem(logic->sample, 0, py_samplenum);
	59	py_samples = PyBytes_FromStringAndSize((const char *)probe_samples,
	60	logic->di->dec_num_probes);
	61	PyList_SetItem(logic->sample, 1, py_samples);
	62	Py_INCREF(logic->sample);
	63	logic->itercnt++;
	64
	65	return logic->sample;
	66	}
	67
	68	SRD_PRIV PyTypeObject srd_logic_type = {
	69	PyVarObject_HEAD_INIT(NULL, 0)
	70	.tp_name = "srd_logic",
	71	.tp_basicsize = sizeof(srd_logic),
	72	.tp_flags = Py_TPFLAGS_DEFAULT,
	73	.tp_doc = "Sigrokdecode logic sample object",
	74	.tp_iter = srd_logic_iter,
	75	.tp_iternext = srd_logic_iternext,
	76	};