Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/zxing-cpp/core/src/GTIN.h @ 41:71bcc18e306f

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MERGE: New upstream PyMuPDF v1.26.5 including MuPDF v1.26.10 BUGS: Needs some additional changes yet. Not yet tested.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 15:24:40 +0200
parents b50eed0cc0ef
children
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1 /*
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2 * Copyright 2016 Nu-book Inc.
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3 * Copyright 2016 ZXing authors
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4 * Copyright 2020 Axel Waggershauser
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5 */
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6 // SPDX-License-Identifier: Apache-2.0
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8 #pragma once
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10 #include "Barcode.h"
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11 #include "BarcodeFormat.h"
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12 #include "ZXAlgorithms.h"
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14 #include <string>
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16 namespace ZXing::GTIN {
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18 template <typename T>
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19 T ComputeCheckDigit(const std::basic_string<T>& digits, bool skipTail = false)
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20 {
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21 int sum = 0, N = Size(digits) - skipTail;
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22 for (int i = N - 1; i >= 0; i -= 2)
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23 sum += digits[i] - '0';
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24 sum *= 3;
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25 for (int i = N - 2; i >= 0; i -= 2)
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26 sum += digits[i] - '0';
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27 return ToDigit<T>((10 - (sum % 10)) % 10);
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28 }
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30 template <typename T>
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31 bool IsCheckDigitValid(const std::basic_string<T>& s)
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32 {
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33 return ComputeCheckDigit(s, true) == s.back();
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34 }
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36 /**
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37 * Evaluate the prefix of the GTIN to estimate the country of origin. See
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38 * <a href="https://www.gs1.org/standards/id-keys/company-prefix">
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39 * https://www.gs1.org/standards/id-keys/company-prefix</a> and
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40 * <a href="https://en.wikipedia.org/wiki/List_of_GS1_country_codes">
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41 * https://en.wikipedia.org/wiki/List_of_GS1_country_codes</a>.
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42 *
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43 * `format` required for EAN-8 (UPC-E assumed if not given)
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44 */
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45 std::string LookupCountryIdentifier(const std::string& GTIN, const BarcodeFormat format = BarcodeFormat::None);
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47 std::string EanAddOn(const Barcode& barcode);
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49 std::string IssueNr(const std::string& ean2AddOn);
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50 std::string Price(const std::string& ean5AddOn);
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52 } // namespace ZXing::GTIN