* This file is part of the sigrok project.
*
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+ * Copyright (C) 2011 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
int unitsize;
char *probelist[65];
int *prevbits;
- char *header;
+ GString *header;
};
const char *vcd_header = "\
-$date\n %s$end\n\
-$version\n %s\n$end\n%s\
-$timescale\n %i %s\n$end\n\
+$date %s $end\n\
+$version %s $end\n%s\
+$timescale %s $end\n\
$scope module %s $end\n\
%s\
$upscope $end\n\
static int init(struct output *o)
{
-/* Maximum header length */
-#define MAX_HEADER_LEN 2048
-
struct context *ctx;
struct probe *probe;
GSList *l;
uint64_t samplerate;
- int i, b, num_probes;
- char *c, *samplerate_s;
- char wbuf[1000], comment[128];
+ int num_probes, period, i;
+ char *samplerate_s, *frequency_s, *timestamp;
time_t t;
if (!(ctx = calloc(1, sizeof(struct context))))
continue;
ctx->probelist[ctx->num_enabled_probes++] = probe->name;
}
+ if (ctx->num_enabled_probes > 94) {
+ g_warning("VCD only supports 94 probes.");
+ return SIGROK_ERR;
+ }
ctx->probelist[ctx->num_enabled_probes] = 0;
ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
+ ctx->header = g_string_sized_new(512);
+ num_probes = g_slist_length(o->device->probes);
- /* TODO: Allow for configuration via o->param. */
+ /* timestamp */
+ t = time(NULL);
+ timestamp = strdup(ctime(&t));
+ timestamp[strlen(timestamp)-1] = 0;
+ g_string_printf(ctx->header, "$date %s $end\n", timestamp);
+ free(timestamp);
- if (!(ctx->header = calloc(1, MAX_HEADER_LEN + 1))) {
- free(ctx);
- return SIGROK_ERR_MALLOC;
- }
- num_probes = g_slist_length(o->device->probes);
+ /* generator */
+ g_string_append_printf(ctx->header, "$version %s %s $end\n",
+ PACKAGE, PACKAGE_VERSION);
- comment[0] = '\0';
if (o->device->plugin) {
- /* TODO: Handle num_probes == 0, too many probes, etc. */
- /* TODO: Error handling. */
samplerate = *((uint64_t *) o->device->plugin->get_device_info(
o->device->plugin_index, DI_CUR_SAMPLERATE));
if (!((samplerate_s = sigrok_samplerate_string(samplerate)))) {
- free(ctx->header);
+ g_string_free(ctx->header, TRUE);
free(ctx);
return SIGROK_ERR;
}
- /* TODO: Handle sprintf() errors. */
- snprintf(comment, 127, vcd_header_comment,
- ctx->num_enabled_probes, num_probes, samplerate_s);
+ g_string_append_printf(ctx->header, vcd_header_comment,
+ ctx->num_enabled_probes, num_probes, samplerate_s);
free(samplerate_s);
}
+ /* timescale */
+ /* VCD can only handle 1/10/100 (s - fs), so scale up first */
+ if (samplerate > MHZ(1))
+ period = GHZ(1);
+ else if (samplerate > KHZ(1))
+ period = MHZ(1);
+ else
+ period = KHZ(1);
+ if (!(frequency_s = sigrok_period_string(period))) {
+ g_string_free(ctx->header, TRUE);
+ free(ctx);
+ return SIGROK_ERR;
+ }
+ g_string_append_printf(ctx->header, "$timescale %s $end\n", frequency_s);
+ free(frequency_s);
+
+ /* scope */
+ g_string_append_printf(ctx->header, "$scope module %s $end\n", PACKAGE);
+
/* Wires / channels */
- wbuf[0] = '\0';
for (i = 0; i < ctx->num_enabled_probes; i++) {
- c = (char *)&wbuf + strlen((char *)&wbuf);
- /* TODO: Needs fixing for very large number of probes. */
- /* TODO: Handle sprintf() errors. */
- sprintf(c, "$var wire 1 %c channel%s $end\n",
- (char)('!' + i), ctx->probelist[i]);
+ g_string_append_printf(ctx->header, "$var wire 1 %c %s $end\n",
+ (char)('!' + i), ctx->probelist[i]);
}
- /* TODO: Date: File or signals? Make y/n configurable. */
- t = time(NULL);
- b = snprintf(ctx->header, MAX_HEADER_LEN, vcd_header, ctime(&t),
- PACKAGE_STRING, comment, 1, "ns", PACKAGE, (char *)&wbuf);
- /* TODO: Handle snprintf() errors. */
+ g_string_append(ctx->header, "$upscope $end\n"
+ "$enddefinitions $end\n$dumpvars\n");
if (!(ctx->prevbits = calloc(sizeof(int), num_probes))) {
- free(ctx->header);
+ g_string_free(ctx->header, TRUE);
free(ctx);
return SIGROK_ERR_MALLOC;
}
{
struct context *ctx;
char *outbuf;
- int outlen;
ctx = o->internal;
switch (event_type) {
- case DF_TRIGGER:
- /* TODO: can a trigger mark be in a VCD file? */
- *data_out = NULL;
- *length_out = 0;
- break;
case DF_END:
- outlen = strlen("$dumpoff\n$end\n");
- if (!(outbuf = malloc(outlen + 1)))
- return SIGROK_ERR_MALLOC;
- /* TODO: Bug? Drop the + 1? */
- /* TODO: Handle snprintf() errors. */
- snprintf(outbuf, outlen + 1, "$dumpoff\n$end\n");
+ outbuf = strdup("$dumpoff\n$end\n");
*data_out = outbuf;
- *length_out = outlen;
+ *length_out = strlen(outbuf);
free(o->internal);
o->internal = NULL;
break;
char **data_out, uint64_t *length_out)
{
struct context *ctx;
- unsigned int i, outsize;
+ unsigned int i;
int p, curbit, prevbit;
uint64_t sample, prevsample;
static uint64_t samplecount = 0;
- char *outbuf, *c;
+ GString *out;
ctx = o->internal;
- outsize = 0;
- if (ctx->header)
- outsize = strlen(ctx->header);
-
- /* FIXME: Use realloc(). */
- if (!(outbuf = calloc(1, outsize + 1 + 10000)))
- return SIGROK_ERR_MALLOC; /* TODO: free()? What to free? */
+ out = g_string_sized_new(512);
- outbuf[0] = '\0';
if (ctx->header) {
/* The header is still here, this must be the first packet. */
- strncpy(outbuf, ctx->header, outsize);
- free(ctx->header);
+ g_string_append(out, ctx->header->str);
+ g_string_free(ctx->header, TRUE);
ctx->header = NULL;
}
- /* TODO: Are disabled probes handled correctly? */
-
for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
samplecount++;
memcpy(&sample, data_in + i, ctx->unitsize);
continue;
/* Output which signal changed to which value. */
- c = outbuf + strlen(outbuf);
- sprintf(c, "#%" PRIu64 "\n%i%c\n", samplecount,
- curbit, (char)('!' + p));
+ g_string_append_printf(out, "#%" PRIu64 "\n%i%c\n", samplecount,
+ curbit, (char)('!' + p));
}
-
- /* TODO: Use realloc() if strlen(outbuf) is almost "full"... */
}
- *data_out = outbuf;
- *length_out = strlen(outbuf);
+ *data_out = out->str;
+ *length_out = out->len;
+ g_string_free(out, FALSE);
return SIGROK_OK;
}
projects / libsigrok.git / commitdiff