evgeny
38c9f229bc
- u_async.c: process immediate_queue BEFORE epoll_wait in uasync_poll - stcp_link.c: defensive NULL etcp_conn/etcp_link in stcp_link_close - utun_instance.c: move stcp_server_list_destroy_all to Phase J (before ETCP), add deferred drain in both Phase J and L - stcp.h/c: STCP_HS_ENC_CLIENT 6→38, STCP_HS_ENC_SERVER 7→39, exchange ed25519_pubkey in both handshake directions - etcp_connections.c: copy peer_ed25519 from STCP to ETCP_CONN in etcp_link_enter_ready_tcp; guard link->etcp in tcp_link_close_cb - chat_sync.c: fix lk->conn NULL dereference for TCP links - test_stcp.c: update stcp_server_create/stcp_client_connect callsites - tools/chat_tcp_test: change transport udp→tcp
66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
// Copyright 2026 Axel Waggershauser
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include <optional>
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#include <span>
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#include <stdexcept>
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#include <string>
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namespace ZXing {
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enum class RSField
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{
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Aztec4,
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Aztec6,
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Aztec8,
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Aztec10,
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Aztec12,
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DataMatrix,
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MaxiCode,
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PDF417,
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QRCode
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};
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inline RSField GF2nAztec(int wordSize)
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{
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switch (wordSize) {
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case 4: return RSField::Aztec4;
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case 6: return RSField::Aztec6;
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case 8: return RSField::Aztec8;
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case 10: return RSField::Aztec10;
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case 12: return RSField::Aztec12;
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default: throw std::invalid_argument("Unsupported word size " + std::to_string(wordSize));
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}
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}
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/**
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* @brief ReedSolomonDecode fixes errors in a codeword containing both data and parity symbols.
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*
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* @param codeword data and error-correction/parity symbols; corrected in place on success
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* @param numECC number of error-correction/parity symbols
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* @param erasures positions of known erasures in the codeword
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* @return optional unused error correction in the range [0, 1] if codeword errors could successfully be fixed (or there have not been
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* any), std::nullopt otherwise
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*/
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std::optional<double> ReedSolomonDecode(RSField field, std::span<int> codeword, int numECC, std::span<const int> erasures = {});
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std::optional<double> ReedSolomonDecode(RSField field, std::span<uint8_t> codeword, int numECC,
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std::span<const int> erasures = {});
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/**
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* @brief ReedSolomonEncode generates error correction symbols for the given data symbols.
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*
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* @param field The Galois field to use for encoding.
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* @param data The input data symbols.
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* @param parity The output buffer for the generated error correction symbols.
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*/
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void ReedSolomonEncode(RSField field, std::span<const uint8_t> data, std::span<uint8_t> parity);
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/// @brief ReedSolomonEncode replaces the last numECC symbols in codeword with parity symbols
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void ReedSolomonEncode(RSField field, std::span<uint8_t> codeword, int numECC);
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void ReedSolomonEncode(RSField field, std::span<int> codeword, int numECC);
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} // ZXing
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