Function receive

libsigrok4DSL/output/gnuplot.c:154–228

}

static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
		GString **out)
{
	const struct sr_datafeed_meta *meta;
	const struct sr_datafeed_logic *logic;
	const struct sr_config *src;
	GSList *l;
	struct context *ctx;
	const uint8_t *sample;
	unsigned int curbit, p, idx, i;

	*out = NULL;
	if (!o || !o->priv)
		return SR_ERR_BUG;
	ctx = o->priv;

	if (packet->type == SR_DF_META) {
		meta = packet->payload;
		for (l = meta->config; l; l = l->next) {
			src = l->data;
			if (src->key != SR_CONF_SAMPLERATE)
				continue;
			ctx->samplerate = g_variant_get_uint64(src->data);
		}
	}

	if (packet->type != SR_DF_LOGIC)
		return SR_OK;
	logic = packet->payload;

	if (!ctx->prevsample) {
		/* Can't allocate this until we know the stream's unitsize. */
		ctx->prevsample = malloc(logic->unitsize);

		if (ctx->prevsample == NULL){
			sr_err("%s,ERROR:failed to alloc memory.", __func__);
		}
	}

	if (!ctx->header_done) {
		*out = gen_header(o);
		ctx->header_done = TRUE;
	} else {
		*out = g_string_sized_new(512);
	}

	for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) {
		sample = logic->data + i;
		ctx->samplecount++;

		/*
		 * Don't output the same sample multiple times, but make
		 * sure to output at least the first and last sample.
		 */
		if (i > 0 && i < logic->length - logic->unitsize) {
			if (!memcmp(sample, ctx->prevsample, logic->unitsize))
				continue;
		}