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OOB protection in GetLineCharAtIdx

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This commit is contained in:
Brian Fiete 2022-02-02 07:50:25 -05:00
parent 6c3944170d
commit b8c7a29b84
1 changed files with 10 additions and 1 deletions
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11
IDEHelper/Compiler/BfParser.cpp
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@ -239,7 +239,16 @@ int BfParserData::GetCharIdAtIndex(int findIndex)
} }
void BfParserData::GetLineCharAtIdx(int idx, int& line, int& lineChar) void BfParserData::GetLineCharAtIdx(int idx, int& line, int& lineChar)
{ {
if (mJumpTableSize <= 0)
{
line = 0;
lineChar = 0;
return;
}
if (idx >= mSrcLength)
idx = mSrcLength - 1;
auto* jumpEntry = mJumpTable + (idx / PARSER_JUMPTABLE_DIVIDE); auto* jumpEntry = mJumpTable + (idx / PARSER_JUMPTABLE_DIVIDE);
if (jumpEntry->mCharIdx > idx) if (jumpEntry->mCharIdx > idx)
jumpEntry--; jumpEntry--;