static void
test_bigend_f32(TestBatch *batch) {
float source[] = { -1.3f, 0.0f, 100.2f };
size_t count = 3;
size_t amount = (count + 1) * sizeof(float);
uint8_t *allocated = (uint8_t*)CALLOCATE(amount, sizeof(uint8_t));
uint8_t *encoded = allocated + 1; // Intentionally misaligned.
uint8_t *target = encoded;
for (size_t i = 0; i < count; i++) {
NumUtil_encode_bigend_f32(source[i], &target);
target += sizeof(float);
}
target = encoded;
for (size_t i = 0; i < count; i++) {
float got = NumUtil_decode_bigend_f32(target);
TEST_TRUE(batch, got == source[i], "bigend f32");
target += sizeof(float);
}
target = encoded;
NumUtil_encode_bigend_f32(-2.0f, &target);
TEST_INT_EQ(batch, (encoded[0] & 0x80), 0x80,
"Truly big-endian (IEEE 754 sign bit set for negative number)");
TEST_INT_EQ(batch, encoded[0], 0xC0,
"IEEE 754 representation of -2.0f, byte 0");
for (size_t i = 1; i < sizeof(float); i++) {
TEST_INT_EQ(batch, encoded[i], 0,
"IEEE 754 representation of -2.0f, byte %d", (int)i);
}
FREEMEM(allocated);
}
void
OutStream_Write_F32_IMP(OutStream *self, float value) {
OutStreamIVARS *const ivars = OutStream_IVARS(self);
char buf[sizeof(float)];
char *buf_copy = buf;
NumUtil_encode_bigend_f32(value, &buf_copy);
SI_write_bytes(self, ivars, buf_copy, sizeof(float));
}
