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Faster macro expansion.

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Turns out QByteArray::setNum() is unnecessarily slow (will be fixed
independently), but even then, we can be faster.

Change-Id: I663bd2b8cc844bbe800879bccfa57999d020ba3b
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
This commit is contained in:
hjk
2012-12-20 15:44:41 +01:00
parent 665382506f
commit afcd9d4c43
1 changed files with 17 additions and 20 deletions
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37
src/libs/cplusplus/pp-engine.cpp
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@@ -1095,16 +1095,17 @@ void Preprocessor::trackExpansionCycles(PPToken *tk)
m_state.m_expandedTokensInfo.clear();
} else if (m_state.m_expansionStatus == Expanding) {
m_state.m_expansionStatus = JustFinishedExpansion;
maybeStartOutputLine();
writeOutput("# expansion begin ");
QByteArray expansionInfo;
expansionInfo.reserve(m_state.m_expandedTokensInfo.size() * 2); // Rough estimate
QByteArray *buffer = currentOutputBuffer();
if (!buffer)
return;
maybeStartOutputLine();
// Offset and length of the macro invocation
expansionInfo.append(QByteArray::number(tk->offset));
expansionInfo.append(',');
expansionInfo.append(QByteArray::number(tk->length()));
char chunk[40];
qsnprintf(chunk, sizeof(chunk), "# expansion begin %d,%d", tk->offset, tk->length());
buffer->append(chunk);
// Expanded tokens
unsigned generatedCount = 0;
@@ -1112,28 +1113,24 @@ void Preprocessor::trackExpansionCycles(PPToken *tk)
const QPair<unsigned, unsigned> &p = m_state.m_expandedTokensInfo.at(i);
if (p.first) {
if (generatedCount) {
expansionInfo.append(" ~");
expansionInfo.append(QByteArray::number(generatedCount));
qsnprintf(chunk, sizeof(chunk), " ~%d", generatedCount);
buffer->append(chunk);
generatedCount = 0;
}
expansionInfo.append(' ');
expansionInfo.append(QByteArray::number(p.first));
expansionInfo.append(':');
expansionInfo.append(QByteArray::number(p.second));
qsnprintf(chunk, sizeof(chunk), " %d:%d", p.first, p.second);
buffer->append(chunk);
} else {
++generatedCount;
}
}
if (generatedCount) {
expansionInfo.append(" ~");
expansionInfo.append(QByteArray::number(generatedCount));
qsnprintf(chunk, sizeof(chunk), " ~%d", generatedCount);
buffer->append(chunk);
}
expansionInfo.append('\n');
writeOutput(expansionInfo);
writeOutput(m_state.m_expansionResult);
buffer->append('\n');
buffer->append(m_state.m_expansionResult);
maybeStartOutputLine();
writeOutput("# expansion end\n");
buffer->append("# expansion end\n");
}
lex(tk);