X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Foutput%2Fcsv.c;h=426cb6ed344ed3040bb7adb9a84f6c3844695ab1;hb=aa0979482f6e7c269609bb2c22d7d75a2845ac75;hp=2be4db372f67101ae3241ede4d7d4c2e9ba3b27c;hpb=d05b1a860606e078eed77722d8a0c62850ee39af;p=libsigrok.git

diff --git a/src/output/csv.c b/src/output/csv.c
index 2be4db37..426cb6ed 100644
--- a/src/output/csv.c
+++ b/src/output/csv.c
@@ -216,7 +216,7 @@ static GString *gen_header(const struct sr_output *o,
 	struct sr_channel *ch;
 	GVariant *gvar;
 	GString *header;
-	GSList *l;
+	GSList *channels, *l;
 	unsigned int num_channels, i;
 	uint64_t samplerate = 0, sr;
 	char *samplerate_s;
@@ -256,18 +256,20 @@ static GString *gen_header(const struct sr_output *o,
 			ctx->title, ctime(&hdr->starttime.tv_sec));
 
 		/* Columns / channels */
-		num_channels = g_slist_length(o->sdi->channels);
+		channels = o->sdi ? o->sdi->channels : NULL;
+		num_channels = g_slist_length(channels);
 		g_string_append_printf(header, "%s Channels (%d/%d):",
 			ctx->comment, ctx->num_analog_channels +
 			ctx->num_logic_channels, num_channels);
-		for (l = o->sdi->channels; l; l = l->next) {
+		for (l = channels; l; l = l->next) {
 			ch = l->data;
 			if (ch->enabled)
 				g_string_append_printf(header, " %s,", ch->name);
 		}
-		if (o->sdi->channels)
+		if (channels) {
 			/* Drop last separator. */
 			g_string_truncate(header, header->len - 1);
+		}
 		g_string_append_printf(header, "\n");
 		if (samplerate != 0) {
 			samplerate_s = sr_samplerate_string(samplerate);
@@ -578,7 +580,7 @@ static int receive(const struct sr_output *o,
 		break;
 	case SR_DF_FRAME_BEGIN:
 		*out = g_string_new(ctx->frame);
-		/* And then fall through to... */
+		/* Fallthrough */
 	case SR_DF_END:
 		/* Got to end of frame/session with part of the data. */
 		if (ctx->channels_seen)
@@ -623,7 +625,7 @@ static struct sr_option options[] = {
 	{"scale", "scale", "Scale gnuplot graphs", NULL, NULL},
 	{"value", "Value separator", "Character to print between values", NULL, NULL},
 	{"record", "Record separator", "String to print between records", NULL, NULL},
-	{"frame", "Frame seperator", "String to print between frames", NULL, NULL},
+	{"frame", "Frame separator", "String to print between frames", NULL, NULL},
 	{"comment", "Comment start string", "String used at start of comment lines", NULL, NULL},
 	{"header", "Output header", "Output header comment with capture metdata", NULL, NULL},
 	{"label", "Label values", "Type of column labels", NULL, NULL},