X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=blobdiff_plain;f=type_logic.c;h=367ff1db5dd2d15e683d3c5386e13c0d9b54d80b;hp=b284ebf73d09744215a72784a5567dd246b78235;hb=d4ad1cb483c6aa4fa2333676d9d8538b2bb32d92;hpb=322c6b2fb36aaa38967ca797acef0ebb1f3090e6

diff --git a/type_logic.c b/type_logic.c
index b284ebf..367ff1d 100644
--- a/type_logic.c
+++ b/type_logic.c
@@ -1,5 +1,5 @@
 /*
- * This file is part of the sigrok project.
+ * This file is part of the libsigrokdecode project.
  *
  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
  *
@@ -17,7 +17,7 @@
  * 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 "libsigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
 #include "config.h"
 #include <inttypes.h>
 #include <string.h>
@@ -29,11 +29,10 @@ static PyObject *srd_logic_iter(PyObject *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];
+	PyObject *py_samplenum, *py_samples;
+	uint8_t *sample_pos, sample;
+	int byte_offset, bit_offset, i;
 
 	logic = (srd_logic *)self;
 	if (logic->itercnt >= logic->inbuflen / logic->di->data_unitsize) {
@@ -45,18 +44,26 @@ static PyObject *srd_logic_iternext(PyObject *self)
 	 * 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;
+	sample_pos = logic->inbuf + logic->itercnt * logic->di->data_unitsize;
+	for (i = 0; i < logic->di->dec_num_probes; i++) {
+		/* A probemap value of -1 means "unused optional probe". */
+		if (logic->di->dec_probemap[i] == -1) {
+			/* Value of unused probe is 0xff, instead of 0 or 1. */
+			logic->di->probe_samples[i] = 0xff;
+		} else {
+			byte_offset = logic->di->dec_probemap[i] / 8;
+			bit_offset = logic->di->dec_probemap[i] % 8;
+			sample = *(sample_pos + byte_offset) & (1 << bit_offset) ? 1 : 0;
+			logic->di->probe_samples[i] = sample;
+		}
+	}
 
 	/* 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,
+	py_samples = PyBytes_FromStringAndSize((const char *)logic->di->probe_samples,
 					       logic->di->dec_num_probes);
 	PyList_SetItem(logic->sample, 1, py_samples);
 	Py_INCREF(logic->sample);
@@ -65,6 +72,7 @@ static PyObject *srd_logic_iternext(PyObject *self)
 	return logic->sample;
 }
 
+/** @cond PRIVATE */
 SRD_PRIV PyTypeObject srd_logic_type = {
 	PyVarObject_HEAD_INIT(NULL, 0)
 	.tp_name = "srd_logic",
@@ -74,3 +82,4 @@ SRD_PRIV PyTypeObject srd_logic_type = {
 	.tp_iter = srd_logic_iter,
 	.tp_iternext = srd_logic_iternext,
 };
+/** @endcond */