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CPlusPlus: Fix finding end of raw string literal

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The employed algorithm lacked proper backtracking, potentially causing us
to miss the delimiter altogether.

Change-Id: I7993c3c27d034925bd884e192779c85c54be9ec4
Reviewed-by: hjk <hjk@qt.io>
This commit is contained in:
Christian Kandeler
2023-11-21 16:07:53 +01:00
parent b298c981f8
commit 7475b073fb
3 changed files with 18 additions and 9 deletions
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18
src/libs/3rdparty/cplusplus/Lexer.cpp vendored
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@@ -838,16 +838,16 @@ void Lexer::scanRawStringLiteral(Token *tok, unsigned char hint)
bool Lexer::scanUntilRawStringLiteralEndPrecise()
{
int matchLen = 0;
QByteArray slidingWindow;
slidingWindow.reserve(_expectedRawStringSuffix.size());
while (_yychar) {
if (_yychar == _expectedRawStringSuffix.at(matchLen)) {
if (++matchLen == _expectedRawStringSuffix.length()) {
_expectedRawStringSuffix.clear();
yyinp();
return true;
}
} else {
matchLen = 0;
slidingWindow.append(_yychar);
if (slidingWindow.size() > _expectedRawStringSuffix.size())
slidingWindow.removeFirst();
if (slidingWindow == _expectedRawStringSuffix) {
_expectedRawStringSuffix.clear();
yyinp();
return true;
}
yyinp();
}