END_TEST
START_TEST(test_analog_si_prefix_null)
{
float value = 1.23;
int digits = 1;
const char *si_prefix;
si_prefix = sr_analog_si_prefix(NULL, &digits);
fail_unless(!strcmp(si_prefix, ""));
si_prefix = sr_analog_si_prefix(&value, NULL);
fail_unless(!strcmp(si_prefix, ""));
si_prefix = sr_analog_si_prefix(NULL, NULL);
fail_unless(!strcmp(si_prefix, ""));
}
END_TEST
START_TEST(test_analog_si_prefix)
{
struct {
float input_value;
int input_digits;
float output_value;
int output_digits;
const char *output_si_prefix;
} v[] = {
{ 12.0 , 0, 12.0 , 0, "" },
{ 12.0 , 1, 12.0 , 1, "" },
{ 12.0 , -1, 0.012, 2, "k" },
{ 1024.0 , 0, 1.024, 3, "k" },
{ 1024.0 , -1, 1.024, 2, "k" },
{ 1024.0 , -3, 1.024, 0, "k" },
{ 12.0e5 , 0, 1.2, 6, "M" },
{ 0.123456, 0, 0.123456, 0, "" },
{ 0.123456, 1, 0.123456, 1, "" },
{ 0.123456, 2, 0.123456, 2, "" },
{ 0.123456, 3, 123.456, 0, "m" },
{ 0.123456, 4, 123.456, 1, "m" },
{ 0.123456, 5, 123.456, 2, "m" },
{ 0.123456, 6, 123.456, 3, "m" },
{ 0.123456, 7, 123.456, 4, "m" },
{ 0.0123 , 4, 12.3, 1, "m" },
{ 0.00123 , 5, 1.23, 2, "m" },
{ 0.000123, 4, 0.123, 1, "m" },
{ 0.000123, 5, 0.123, 2, "m" },
{ 0.000123, 6, 123.0, 0, "µ" },
{ 0.000123, 7, 123.0, 1, "µ" },
};
for (unsigned int i = 0; i < ARRAY_SIZE(v); i++) {
float value = v[i].input_value;
int digits = v[i].input_digits;
const char *si_prefix = sr_analog_si_prefix(&value, &digits);
fail_unless(fabs(value - v[i].output_value) <= 0.00001,
"sr_analog_si_prefix() unexpected output value %f (i=%d).",
value , i);
fail_unless(digits == v[i].output_digits,
"sr_analog_si_prefix() unexpected output digits %d (i=%d).",
digits, i);
fail_unless(!strcmp(si_prefix, v[i].output_si_prefix),
"sr_analog_si_prefix() unexpected output prefix \"%s\" (i=%d).",
si_prefix, i);
}
}
static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
GString **out)
{
struct context *ctx;
const struct sr_datafeed_analog *analog;
struct sr_channel *ch;
GSList *l;
float *fdata;
unsigned int i;
int num_channels, c, ret, digits;
char *number, *suffix;
*out = NULL;
if (!o || !o->sdi)
return SR_ERR_ARG;
ctx = o->priv;
switch (packet->type) {
case SR_DF_FRAME_BEGIN:
*out = g_string_new("FRAME-BEGIN\n");
break;
case SR_DF_FRAME_END:
*out = g_string_new("FRAME-END\n");
break;
case SR_DF_ANALOG:
analog = packet->payload;
num_channels = g_slist_length(analog->meaning->channels);
if (!(fdata = g_try_realloc(ctx->fdata,
analog->num_samples * num_channels * sizeof(float))))
return SR_ERR_MALLOC;
ctx->fdata = fdata;
if ((ret = sr_analog_to_float(analog, fdata)) != SR_OK)
return ret;
*out = g_string_sized_new(512);
if (analog->encoding->is_digits_decimal) {
if (ctx->digits == DIGITS_ALL)
digits = analog->encoding->digits;
else
digits = analog->spec->spec_digits;
} else {
/* TODO we don't know how to print by number of bits yet. */
digits = 6;
}
gboolean si_friendly = sr_analog_si_prefix_friendly(analog->meaning->unit);
sr_analog_unit_to_string(analog, &suffix);
for (i = 0; i < analog->num_samples; i++) {
for (l = analog->meaning->channels, c = 0; l; l = l->next, c++) {
float value = fdata[i * num_channels + c];
const char *prefix = "";
if (si_friendly)
prefix = sr_analog_si_prefix(&value, &digits);
ch = l->data;
g_string_append_printf(*out, "%s: ", ch->name);
number = g_strdup_printf("%.*f", MAX(digits, 0), value);
g_string_append(*out, number);
g_free(number);
g_string_append(*out, " ");
g_string_append(*out, prefix);
g_string_append(*out, suffix);
g_string_append(*out, "\n");
}
}
g_free(suffix);
break;
}
return SR_OK;
}
