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Fix ubsan runtime error: left shift of negative value -9

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Michael Krasnyk 2016-11-16 00:08:40 +01:00 committed by Daniel Patterson
parent 73e365d398
commit 1eaf9f3269
1 changed files with 5 additions and 9 deletions
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14
src/engine/polyline_compressor.cpp
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@ -33,20 +33,16 @@ std::string encode(std::vector<int> &numbers)
std::string output;
for (auto &number : numbers)
{
bool isNegative = number < 0;
if (isNegative)
if (number < 0)
{
const unsigned binary = std::llabs(number);
const unsigned twos = (~binary) + 1u;
number = twos;
const unsigned shl = twos << 1u;
number = static_cast<int>(~shl);
}
number <<= 1u;
if (isNegative)
else
{
number = ~number;
number <<= 1u;
}
}
for (const int number : numbers)