diogo/yap-6.3
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check for overflows when performing expansion

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case the factor size after expansion be bigger than an unsigned integer, abort the program
This commit is contained in:
Tiago Gomes 2012-04-20 17:16:10 +01:00
parent 0ffa409a80
commit 085ebe1e96
1 changed files with 11 additions and 1 deletions
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12
packages/CLPBN/clpbn/bp/Parfactor.cpp
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@ -583,7 +583,14 @@ Parfactor::expandPotential (
unsigned newRange,
const vector<unsigned>& sumIndexes)
{
unsigned newSize = (params_.size() / ranges_[fIdx]) * newRange;
Params::size_type newSize = (params_.size() / ranges_[fIdx]) * newRange;
if (newSize > Util::maxUnsigned()) {
// factor will become to bigger, is not worth to continue
cerr << "error: an overflow occurred when performing expansion" ;
cerr << endl;
abort();
}
Params copy = params_;
params_.clear();
params_.reserve (newSize);
@ -599,6 +606,9 @@ Parfactor::expandPotential (
ranges_[fIdx] = newRange;
vector<unsigned> indices (ranges_.size(), 0);
for (unsigned k = 0; k < newSize; k++) {
if (index >= copy.size()) {
abort();
}
assert (index < copy.size());
params_.push_back (copy[index]);
for (int i = ranges_.size() - 1; i >= 0; i--) {