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Fix logic_substring behaviour with unexpected length/startpos values

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This commit is contained in:
MoofEMP 2021-07-27 02:29:32 -04:00
parent 22557f3751
commit 41cde5ccf7
1 changed files with 13 additions and 2 deletions
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15
sp/src/game/server/logic_substring.cpp
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@ -66,8 +66,19 @@ void CLogicSubstring::InputInValue( inputdata_t &inputData )
{
if( !m_bEnabled ) return;
char* strOutValue = (char*)malloc( m_nLength );
Q_strncpy( strOutValue, inputData.value.String() + m_nStartPos, m_nLength + 1 ); // note length+1 to account for null terminator
int startPosCheck = m_nStartPos < 0 ? Q_strlen(inputData.value.String()) + m_nStartPos : m_nStartPos;
if( startPosCheck < 0 )
{
startPosCheck = 0;
}
int lengthCheck = (m_nLength < 0 || m_nLength > Q_strlen(inputData.value.String()) - startPosCheck ? Q_strlen(inputData.value.String()) - startPosCheck : m_nLength) + 1;
if( lengthCheck < 1 || startPosCheck > Q_strlen(inputData.value.String()) )
{
m_OutValue.Set( MAKE_STRING(""), inputData.pActivator, this );
return;
}
char* strOutValue = (char*)malloc( lengthCheck );
Q_strncpy( strOutValue, inputData.value.String() + startPosCheck, lengthCheck );
m_OutValue.Set( MAKE_STRING(strOutValue), inputData.pActivator, this );
}