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Fixed potential overflow in C++ code, in worst case when int type is int16.

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Project Nayuki
2017-04-24 20:47:32 +00:00
parent 4bc769e58f
commit 3da7c7b7dc
1 changed files with 1 additions and 1 deletions
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cpp/QrSegment.cpp
+1 -1
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@@ -141,7 +141,7 @@ int QrSegment::getTotalBits(const std::vector<QrSegment> &segs, int version) {
const QrSegment &seg(segs.at(i));
int ccbits = seg.mode.numCharCountBits(version);
// Fail if segment length value doesn't fit in the length field's bit-width
if ((unsigned int)seg.numChars >= (1U << ccbits) || seg.bitLength > INT16_MAX)
if (seg.numChars >= (1L << ccbits) || seg.bitLength > INT16_MAX)
return -1;
long temp = (long)result + 4 + ccbits + seg.bitLength;
if (temp > INT_MAX)