Fix output API receive() function

[libsigrok.git] / output / vcd.c

diff --git a/output/vcd.c b/output/vcd.c
index 90493f05b88540e3f5e976c544b6b2fc6a5d95bc..6e13d7046b17655c4db9251a5a15cb3e5f64a574 100644 (file)
--- a/output/vcd.c
+++ b/output/vcd.c
@@ -151,12 +151,11 @@ static int init(struct sr_output *o)
        return SR_OK;
 }
 
-static GString *receive(struct sr_output *o, const struct sr_dev_inst *sdi,
-               const struct sr_datafeed_packet *packet)
+static int receive(struct sr_output *o, const struct sr_dev_inst *sdi,
+               const struct sr_datafeed_packet *packet, GString **out)
 {
        const struct sr_datafeed_logic *logic;
        struct context *ctx;
-       GString *text;
        unsigned int i;
        int p, curbit, prevbit, index;
        uint8_t *sample;
@@ -164,23 +163,23 @@ static GString *receive(struct sr_output *o, const struct sr_dev_inst *sdi,
 
        (void)sdi;
 
+       *out = NULL;
        if (!o || !o->internal)
-               return NULL;
+               return SR_ERR_ARG;
        ctx = o->internal;
 
        if (packet->type == SR_DF_END) {
-               text = g_string_sized_new(16);
-               g_string_printf(text, "$dumpoff\n$end\n");
-               return text;
+               *out = g_string_new("$dumpoff\n$end\n");
+               return SR_OK;
        } else if (packet->type != SR_DF_LOGIC)
-               return NULL;
+               return SR_OK;
 
        if (ctx->header) {
                /* The header is still here, this must be the first packet. */
-               text = ctx->header;
+               *out = ctx->header;
                ctx->header = NULL;
        } else {
-               text = g_string_sized_new(512);
+               *out = g_string_sized_new(512);
        }
 
        logic = packet->payload;
@@ -199,7 +198,7 @@ static GString *receive(struct sr_output *o, const struct sr_dev_inst *sdi,
                                continue;
 
                        /* Output which signal changed to which value. */
-                       g_string_append_printf(text, "#%" PRIu64 "\n%i%c\n",
+                       g_string_append_printf(*out, "#%" PRIu64 "\n%i%c\n",
                                        (uint64_t)(((float)samplecount / ctx->samplerate)
                                        * ctx->period), curbit, (char)('!' + p));
                }
@@ -207,7 +206,7 @@ static GString *receive(struct sr_output *o, const struct sr_dev_inst *sdi,
                memcpy(ctx->prevsample, sample, ctx->unitsize);
        }
 
-       return text;
+       return SR_OK;
 }
 
 static int cleanup(struct sr_output *o)
@@ -228,6 +227,6 @@ struct sr_output_format output_vcd = {
        .description = "Value Change Dump (VCD)",
        .df_type = SR_DF_LOGIC,
        .init = init,
-       .recv = receive,
+       .receive = receive,
        .cleanup = cleanup,
 };