openharmony/third_party_qrcodegen
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Tweaked code and comment in QrCode.encodeSegments() in all language versions.

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Project Nayuki
2018-08-26 02:03:27 +00:00
parent c9553ead71
commit c86dacacb7
7 changed files with 37 additions and 27 deletions
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cpp/QrCode.cpp
+7 -5
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@@ -87,7 +87,6 @@ QrCode QrCode::encodeSegments(const vector<QrSegment> &segs, Ecc ecl,
}
// Concatenate all segments to create the data bit string
size_t dataCapacityBits = getNumDataCodewords(version, ecl) * 8;
BitBuffer bb;
for (const QrSegment &seg : segs) {
bb.appendBits(seg.getMode().getModeBits(), 4);
@@ -96,15 +95,18 @@ QrCode QrCode::encodeSegments(const vector<QrSegment> &segs, Ecc ecl,
}
// Add terminator and pad up to a byte if applicable
size_t dataCapacityBits = getNumDataCodewords(version, ecl) * 8;
if (bb.size() > dataCapacityBits)
throw std::logic_error("Assertion error");
bb.appendBits(0, std::min<size_t>(4, dataCapacityBits - bb.size()));
bb.appendBits(0, (8 - bb.size() % 8) % 8);
// Pad with alternate bytes until data capacity is reached
for (uint8_t padByte = 0xEC; bb.size() < dataCapacityBits; padByte ^= 0xEC ^ 0x11)
bb.appendBits(padByte, 8);
if (bb.size() % 8 != 0)
throw std::logic_error("Assertion error");
// Pad with alternating bytes until data capacity is reached
for (uint8_t padByte = 0xEC; bb.size() < dataCapacityBits; padByte ^= 0xEC ^ 0x11)
bb.appendBits(padByte, 8);
// Create the QR Code symbol
return QrCode(version, ecl, bb.getBytes(), mask);
}