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
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
/*
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* Copyright 2016 Nu-book Inc.
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* Copyright 2016 ZXing authors
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* Copyright 2020 Axel Waggershauser
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*/
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "Barcode.h"
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#include "BarcodeFormat.h"
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#ifdef ZXING_INTERNAL
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#include "ZXAlgorithms.h"
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#endif
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#include <string>
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#include <string_view>
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namespace ZXing::GTIN {
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#ifdef ZXING_INTERNAL
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template <typename T>
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T ComputeCheckDigit(const std::basic_string<T>& digits, bool skipTail = false)
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{
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int sum = 0, N = Size(digits) - skipTail;
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for (int i = N - 1; i >= 0; i -= 2)
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sum += digits[i] - '0';
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sum *= 3;
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for (int i = N - 2; i >= 0; i -= 2)
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sum += digits[i] - '0';
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return ToDigit<T>((10 - (sum % 10)) % 10);
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}
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template <typename T>
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bool IsCheckDigitValid(const std::basic_string<T>& s)
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{
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return ComputeCheckDigit(s, true) == s.back();
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}
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#endif
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/**
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* Evaluate the prefix of the GTIN to estimate the country of origin. See
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* <a href="https://www.gs1.org/standards/id-keys/company-prefix">
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* https://www.gs1.org/standards/id-keys/company-prefix</a> and
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* <a href="https://en.wikipedia.org/wiki/List_of_GS1_country_codes">
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* https://en.wikipedia.org/wiki/List_of_GS1_country_codes</a>.
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*
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* `format` required for EAN-8 (UPC-E assumed if not given)
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*/
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std::string LookupCountryIdentifier(std::string_view GTIN, BarcodeFormat format = BarcodeFormat::None);
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std::string EanAddOn(const Barcode& barcode);
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std::string IssueNr(const std::string& ean2AddOn);
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std::string Price(const std::string& ean5AddOn);
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} // namespace ZXing::GTIN
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