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144 lines
3.5 KiB
144 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Digital Voice Modem - Test Suite
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* GPLv2 Open Source. Use is subject to license terms.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright (C) 2025 Bryan Biedenkapp, N2PLL
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*
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*/
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#include "common/Log.h"
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#include "common/Utils.h"
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#include <catch2/catch_test_macros.hpp>
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#include <cstring>
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#include "common/edac/RS634717.h"
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using namespace edac;
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TEST_CASE("RS24169 preserves all-zero payload", "[edac][rs24169]") {
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uint8_t data[24U];
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::memset(data, 0x00U, sizeof(data));
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RS634717 rs;
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rs.encode24169(data);
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Utils::dump(2U, "encode24169()", data, 24U);
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REQUIRE(rs.decode24169(data));
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// First 16 bytes should be zero (data portion)
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for (size_t i = 0; i < 12U; i++) {
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REQUIRE(data[i] == 0x00U);
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}
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}
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TEST_CASE("RS24169 preserves all-ones payload", "[edac][rs24169]") {
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uint8_t data[24U];
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::memset(data, 0xFFU, sizeof(data));
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RS634717 rs;
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rs.encode24169(data);
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Utils::dump(2U, "encode24169()", data, 24U);
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REQUIRE(rs.decode24169(data));
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// First 16 bytes should be 0xFF
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for (size_t i = 0; i < 12U; i++) {
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REQUIRE(data[i] == 0xFFU);
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}
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}
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TEST_CASE("RS24169 preserves alternating pattern", "[edac][rs24169]") {
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uint8_t original[16U];
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for (size_t i = 0; i < 16U; i++) {
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original[i] = (i % 2 == 0) ? 0xAAU : 0x55U;
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}
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uint8_t data[24U];
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::memcpy(data, original, 16U);
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::memset(data + 16U, 0x00U, 8U);
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RS634717 rs;
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rs.encode24169(data);
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Utils::dump(2U, "encode24169()", data, 24U);
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REQUIRE(rs.decode24169(data));
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REQUIRE(::memcmp(data, original, 12U) == 0);
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}
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TEST_CASE("RS24169 preserves incrementing pattern", "[edac][rs24169]") {
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uint8_t original[16U];
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for (size_t i = 0; i < 16U; i++) {
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original[i] = (uint8_t)(i * 16);
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}
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uint8_t data[24U];
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::memcpy(data, original, 16U);
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::memset(data + 16U, 0x00U, 8U);
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RS634717 rs;
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rs.encode24169(data);
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Utils::dump(2U, "encode24169()", data, 24U);
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REQUIRE(rs.decode24169(data));
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REQUIRE(::memcmp(data, original, 12U) == 0);
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}
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TEST_CASE("RS24169 corrects single-byte errors", "[edac][rs24169]") {
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uint8_t original[16U];
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for (size_t i = 0; i < 16U; i++) {
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original[i] = (uint8_t)(i + 50);
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}
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uint8_t data[24U];
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::memcpy(data, original, 16U);
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::memset(data + 16U, 0x00U, 8U);
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RS634717 rs;
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rs.encode24169(data);
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Utils::dump(2U, "encode24169()", data, 24U);
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// Introduce single-byte errors
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const size_t errorPositions[] = {0, 8, 15, 18, 22};
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for (auto pos : errorPositions) {
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uint8_t corrupted[24U];
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::memcpy(corrupted, data, 24U);
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corrupted[pos] ^= 0xFFU;
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RS634717 rsDec;
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bool decoded = rsDec.decode24169(corrupted);
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// RS(24,16,9) can correct up to 4 symbol errors
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if (decoded) {
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REQUIRE(::memcmp(corrupted, original, 12U) == 0);
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}
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}
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}
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TEST_CASE("RS24169 detects uncorrectable errors", "[edac][rs24169]") {
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uint8_t original[16U];
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for (size_t i = 0; i < 16U; i++) {
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original[i] = (uint8_t)(i * 13);
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}
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uint8_t data[24U];
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::memcpy(data, original, 16U);
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::memset(data + 16U, 0x00U, 8U);
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RS634717 rs;
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rs.encode24169(data);
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Utils::dump(2U, "encode24169()", data, 24U);
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// Introduce too many errors
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for (size_t i = 0; i < 8U; i++) {
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data[i] ^= 0xFFU;
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}
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bool result = rs.decode24169(data);
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REQUIRE(!result);
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}
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