28 lines
895 B
C++
28 lines
895 B
C++
#include <cstdint>
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#include <cassert>
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#include "QrHelpers.h"
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/**
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* Maps QR version (starting at a fictitious 0) to the usable byte size for L(ow) CRC checking QR.
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*
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* See https://www.qrcode.com/en/about/version.html
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*/
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uint16_t qr_version_binary_sizes[] = {
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0, 17, 32, 53, 78, 106, 134, 154, 192, 230, // 0 - 9
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271, 321, 367, 425, 458, 520, 586, 644, 718, 792, // 10-19
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858, 929, 1003, 1091, 1171, 1273, 1367, 1465, 1528, 1682, // 20-29
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1732, 1840, 1952, 2068, 2188, 2303, 2431, 2563, 2699, 2809, 2953 // 30-40
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};
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bool getQrVersionForBinaryDataLength(size_t inLength, int& outVersion) {
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static_assert(sizeof(qr_version_binary_sizes) == 41 * sizeof(int16_t));
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for (int version = 1; version < 41; version++) {
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if (inLength <= qr_version_binary_sizes[version]) {
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outVersion = version;
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return true;
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}
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}
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return false;
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}
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