#include <libsigrok/libsigrok.h>
#include "lib.h"
+/*
+ * This test sequence cannot use internal helpers, since it's limited
+ * to the library's public API (by design). That is why there are local
+ * helper routines for endianess handling.
+ */
+
+static int host_be;
+
+static void get_host_endianess(void)
+{
+ int x;
+ uint8_t *p;
+
+ p = (void *)&x;
+ x = 1;
+ host_be = *p ? 0 : 1;
+}
+
+static void swap_bytes(uint8_t *buff, size_t blen)
+{
+ size_t idx;
+ uint8_t tmp;
+
+ for (idx = 0; idx < blen / 2; idx++) {
+ tmp = buff[blen - 1 - idx];
+ buff[blen - 1 - idx] = buff[idx];
+ buff[idx] = tmp;
+ }
+}
+
static int sr_analog_init_(struct sr_datafeed_analog *analog,
struct sr_analog_encoding *encoding,
struct sr_analog_meaning *meaning,
}
END_TEST
+START_TEST(test_analog_to_float_conv)
+{
+ static const int with_diag = 0;
+
+ struct {
+ const char *desc;
+ void *bytes;
+ size_t nums, unit;
+ int is_fp, is_sign, is_be;
+ int scale, offset;
+ float *want;
+ } *item, items[] = {
+ /* Test to cover multiple values in an array, odd numbers. */
+ {
+ .desc = "float single input, native, value array",
+ .bytes = (float[]){ -12.9, -333.999, 0, 3.14, 29.7, 9898.12, },
+ .nums = 6, .unit = sizeof(float),
+ .is_fp = TRUE, .is_sign = FALSE, .is_be = host_be,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ -12.9, -333.999, 0, 3.14, 29.7, 9898.12, },
+ },
+ /* Tests to cover floating point input data conversion. */
+ {
+ .desc = "float single input, native",
+ .bytes = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ .nums = 4, .unit = sizeof(float),
+ .is_fp = TRUE, .is_sign = FALSE, .is_be = host_be,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ },
+ {
+ .desc = "float single input, big endian",
+ .bytes = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ .nums = 4, .unit = sizeof(float),
+ .is_fp = TRUE, .is_sign = FALSE, .is_be = TRUE,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ },
+ {
+ .desc = "float single input, little endian",
+ .bytes = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ .nums = 4, .unit = sizeof(float),
+ .is_fp = TRUE, .is_sign = FALSE, .is_be = FALSE,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ },
+ {
+ .desc = "float double input, native",
+ .bytes = (double[]){ 1.0, 2.0, 3.0, 4.0, },
+ .nums = 4, .unit = sizeof(double),
+ .is_fp = TRUE, .is_sign = FALSE, .is_be = host_be,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ },
+ {
+ .desc = "float half input, unsupported, fake bytes",
+ .bytes = (uint16_t[]){ 0x1234, 0x5678, },
+ .nums = 2, .unit = sizeof(uint16_t),
+ .is_fp = TRUE, .is_sign = FALSE, .is_be = host_be,
+ .want = NULL,
+ },
+ {
+ .desc = "float quad input, unsupported, fake bytes",
+ .bytes = (uint64_t[]){ 0x0, 0x0, },
+ .nums = 1, .unit = 2 * sizeof(uint64_t),
+ .is_fp = TRUE, .is_sign = FALSE, .is_be = host_be,
+ .want = NULL,
+ },
+ /* Tests to cover integer input data conversion. */
+ {
+ .desc = "int u8 input",
+ .bytes = (uint8_t[]){ 1, 2, 3, 4, },
+ .nums = 4, .unit = sizeof(uint8_t),
+ .is_fp = FALSE, .is_sign = FALSE, .is_be = host_be,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ },
+ {
+ .desc = "int i8 input",
+ .bytes = (int8_t[]){ -1, 2, -3, 4, },
+ .nums = 4, .unit = sizeof(int8_t),
+ .is_fp = FALSE, .is_sign = TRUE, .is_be = host_be,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ -1.0, 2.0, -3.0, 4.0, },
+ },
+ {
+ .desc = "int u16 input, big endian",
+ .bytes = (uint16_t[]){ 1, 2, 3, 4, },
+ .nums = 4, .unit = sizeof(uint16_t),
+ .is_fp = FALSE, .is_sign = FALSE, .is_be = TRUE,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ },
+ {
+ .desc = "int u16 input, little endian",
+ .bytes = (uint16_t[]){ 1, 2, 3, 4, },
+ .nums = 4, .unit = sizeof(uint16_t),
+ .is_fp = FALSE, .is_sign = FALSE, .is_be = FALSE,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ },
+ {
+ .desc = "int i16 input, big endian",
+ .bytes = (int16_t[]){ 1, -2, 3, -4, },
+ .nums = 4, .unit = sizeof(int16_t),
+ .is_fp = FALSE, .is_sign = TRUE, .is_be = TRUE,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, -2.0, 3.0, -4.0, },
+ },
+ {
+ .desc = "int i16 input, little endian",
+ .bytes = (int16_t[]){ 1, -2, 3, -4, },
+ .nums = 4, .unit = sizeof(int16_t),
+ .is_fp = FALSE, .is_sign = TRUE, .is_be = FALSE,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, -2.0, 3.0, -4.0, },
+ },
+ {
+ .desc = "int u32 input, big endian",
+ .bytes = (uint32_t[]){ 1, 2, 3, 4, },
+ .nums = 4, .unit = sizeof(uint32_t),
+ .is_fp = FALSE, .is_sign = FALSE, .is_be = TRUE,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ },
+ {
+ .desc = "int u32 input, little endian",
+ .bytes = (uint32_t[]){ 1, 2, 3, 4, },
+ .nums = 4, .unit = sizeof(uint32_t),
+ .is_fp = FALSE, .is_sign = FALSE, .is_be = FALSE,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ },
+ {
+ .desc = "int i32 input, big endian",
+ .bytes = (int32_t[]){ 1, 2, -3, -4, },
+ .nums = 4, .unit = sizeof(int32_t),
+ .is_fp = FALSE, .is_sign = TRUE, .is_be = TRUE,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, -3.0, -4.0, },
+ },
+ {
+ .desc = "int i32 input, little endian",
+ .bytes = (int32_t[]){ 1, 2, -3, -4, },
+ .nums = 4, .unit = sizeof(int32_t),
+ .is_fp = FALSE, .is_sign = TRUE, .is_be = FALSE,
+ .scale = 1, .offset = 0,
+ .want = (float[]){ 1.0, 2.0, -3.0, -4.0, },
+ },
+ {
+ .desc = "int u64 input, unsupported",
+ .bytes = (uint64_t[]){ 1, 2, 3, 4, },
+ .nums = 4, .unit = sizeof(uint64_t),
+ .is_fp = FALSE, .is_sign = FALSE, .is_be = TRUE,
+ .want = NULL,
+ },
+ /* Tests to cover scale/offset calculation. */
+ {
+ .desc = "float single input, scale + offset",
+ .bytes = (float[]){ 1.0, 2.0, 3.0, 4.0, },
+ .nums = 4, .unit = sizeof(float),
+ .is_fp = TRUE, .is_sign = FALSE, .is_be = host_be,
+ .scale = 3, .offset = 2,
+ .want = (float[]){ 5.0, 8.0, 11.0, 14.0, },
+ },
+ {
+ .desc = "int u8 input, scale + offset",
+ .bytes = (uint8_t[]){ 1, 2, 3, 4, },
+ .nums = 4, .unit = sizeof(uint8_t),
+ .is_fp = FALSE, .is_sign = FALSE, .is_be = TRUE,
+ .scale = 3, .offset = 2,
+ .want = (float[]){ 5.0, 8.0, 11.0, 14.0, },
+ },
+ };
+ const size_t max_floats = 6;
+ struct sr_channel ch = {
+ .index = 0,
+ .enabled = TRUE,
+ .type = SR_CHANNEL_LOGIC,
+ .name = "input",
+ };
+
+ size_t item_idx;
+ char item_text[32];
+ struct sr_datafeed_analog analog;
+ struct sr_analog_encoding encoding;
+ struct sr_analog_meaning meaning;
+ struct sr_analog_spec spec;
+ size_t byte_count, value_idx;
+ uint8_t f_in[max_floats * sizeof(double)], *byte_ptr;
+ float f_out[max_floats];
+ int ret;
+ float want, have;
+
+ for (item_idx = 0; item_idx < ARRAY_SIZE(items); item_idx++) {
+ item = &items[item_idx];
+
+ /* Construct "4x u32le" style test item identification. */
+ snprintf(item_text, sizeof(item_text), "%zu: %zux %c%zu%s",
+ item_idx, item->nums,
+ item->is_fp ? 'f' : item->is_sign ? 'i' : 'u',
+ item->unit * 8, item->is_be ? "be" : "le");
+ if (with_diag) {
+ fprintf(stderr, "%s -- %s", item_text, item->desc);
+ fflush(stderr);
+ }
+
+ /* Copy input data bytes, optionally adjust endianess. */
+ byte_count = item->nums * item->unit;
+ memcpy(f_in, item->bytes, byte_count);
+ if (item->is_be != host_be) {
+ byte_ptr = &f_in[0];
+ for (value_idx = 0; value_idx < item->nums; value_idx++) {
+ swap_bytes(byte_ptr, item->unit);
+ byte_ptr += item->unit;
+ }
+ }
+ if (with_diag) {
+ fprintf(stderr, " -- bytes:");
+ for (value_idx = 0; value_idx < byte_count; value_idx++)
+ fprintf(stderr, " %02x", f_in[value_idx]);
+ fflush(stderr);
+ }
+
+ /* Setup the analog feed description. */
+ sr_analog_init_(&analog, &encoding, &meaning, &spec, 3);
+ analog.num_samples = item->nums;
+ analog.data = &f_in[0];
+ encoding.unitsize = item->unit;
+ encoding.is_float = item->is_fp;
+ encoding.is_signed = item->is_sign;
+ encoding.is_bigendian = item->is_be;
+ encoding.scale.p = item->scale ? item->scale : 1;
+ encoding.offset.p = item->offset;
+ meaning.channels = g_slist_append(NULL, &ch);
+
+ /* Convert to an array of single precision float values. */
+ ret = sr_analog_to_float(&analog, &f_out[0]);
+ if (!item->want) {
+ fail_if(ret == SR_OK,
+ "%s: sr_analog_to_float() passed", item_text);
+ if (with_diag) {
+ fprintf(stderr, " -- expected fail, OK\n");
+ fflush(stderr);
+ }
+ continue;
+ }
+ fail_unless(ret == SR_OK,
+ "%s: sr_analog_to_float() failed: %d", item_text, ret);
+ if (with_diag) {
+ fprintf(stderr, " -- float:");
+ for (value_idx = 0; value_idx < item->nums; value_idx++)
+ fprintf(stderr, " %f", f_out[value_idx]);
+ fprintf(stderr, "\n");
+ fflush(stderr);
+ }
+
+ /*
+ * Compare result data to the expectation. No tolerance
+ * is required here due to the input set's values. This
+ * test concentrates on endianess / data type / bit count
+ * conversion and simple scale/offset calculation, neither
+ * on precision nor rounding nor truncation.
+ */
+ for (value_idx = 0; value_idx < item->nums; value_idx++) {
+ want = item->want[value_idx];
+ have = f_out[value_idx];
+ fail_unless(want == have,
+ "%s: input %f != output %f",
+ item_text, want, have);
+ }
+ }
+}
+END_TEST
+
START_TEST(test_analog_si_prefix)
{
struct {
Suite *s;
TCase *tc;
+ get_host_endianess();
+
s = suite_create("analog");
tc = tcase_create("analog_to_float");
tcase_add_test(tc, test_analog_to_float);
tcase_add_test(tc, test_analog_to_float_null);
+ tcase_add_test(tc, test_analog_to_float_conv);
+ suite_add_tcase(s, tc);
+
+ tc = tcase_create("analog_si_unit");
tcase_add_test(tc, test_analog_si_prefix);
tcase_add_test(tc, test_analog_si_prefix_null);
tcase_add_test(tc, test_analog_unit_to_string);
tcase_add_test(tc, test_analog_unit_to_string_null);
+ suite_add_tcase(s, tc);
+
+ tc = tcase_create("analog_rational");
tcase_add_test(tc, test_set_rational);
tcase_add_test(tc, test_set_rational_null);
tcase_add_test(tc, test_cmp_rational);
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