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optimize assignments: record number of literals

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that way the result vector can be pre-allocated - which gives zero
resizes if no expansions are in the expression.
for the joined argument lists of built-in functions, pre-allocate a
fixed 5 elements, which covers all cases and more.
the argument lists of user-defined functions are not pre-allocated
yet.
This commit is contained in:
Oswald Buddenhagen
2010-05-31 21:07:14 +02:00
parent a1fa00d2e7
commit 033a148b43
2 changed files with 28 additions and 10 deletions
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32
src/shared/proparser/profileevaluator.cpp
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@@ -199,6 +199,8 @@ public:
struct ParseCtx {
int parens; // Nesting of non-functional parentheses
int argc; // Number of arguments in current function call
int litCount; // Number of literals in current expression
int expCount; // Number of expansions in current expression
Context context;
ushort quote; // Enclosing quote type
ushort terminator; // '}' if replace function call is braced, ':' if test function
@@ -266,7 +268,7 @@ public:
static ProStringList split_value_list(const QString &vals);
bool isActiveConfig(const QString &config, bool regex = false);
ProStringList expandVariableReferences(const ProString &value, int *pos = 0, bool joined = false);
ProStringList expandVariableReferences(const ushort *&tokPtr, bool joined = false);
ProStringList expandVariableReferences(const ushort *&tokPtr, int sizeHint = 0, bool joined = false);
ProStringList evaluateExpandFunction(const ProString &function, const ProString &arguments);
ProStringList evaluateExpandFunction(const ProString &function, const ushort *&tokPtr);
ProStringList evaluateExpandFunction(const ProString &function, const ProStringList &args);
@@ -681,6 +683,8 @@ bool ProFileEvaluator::Private::readInternal(QString *out, const QString &in)
Context context = CtxTest;
int parens = 0;
int argc = 0;
int litCount = 0;
int expCount = 0;
bool inError = false;
bool putSpace = false; // Only ever true inside quoted string
bool lineMarked = true; // For in-expression markers
@@ -714,6 +718,7 @@ bool ProFileEvaluator::Private::readInternal(QString *out, const QString &in)
xprPtr[-1] = tlen; \
if (setSep) \
needSep = TokNewStr; \
litCount++; \
} else { \
ptr -= 2; \
if (setSep && ptr != ((context == CtxValue) ? tokPtr : buf)) \
@@ -822,6 +827,7 @@ bool ProFileEvaluator::Private::readInternal(QString *out, const QString &in)
xprPtr[-2] = TokLiteral | needSep;
xprPtr[-1] = tlen;
needSep = 0;
litCount++;
} else {
ptr -= 2;
}
@@ -871,6 +877,7 @@ bool ProFileEvaluator::Private::readInternal(QString *out, const QString &in)
tok |= TokQuoted;
tok |= needSep;
needSep = 0;
expCount++;
tlen = ptr - xprPtr;
if (rtok == TokVariable) {
xprPtr[-4] = tok;
@@ -892,6 +899,8 @@ bool ProFileEvaluator::Private::readInternal(QString *out, const QString &in)
top.terminator = term;
top.context = context;
top.argc = argc;
top.litCount = litCount;
top.expCount = expCount;
}
parens = 0;
quote = 0;
@@ -962,6 +971,8 @@ bool ProFileEvaluator::Private::readInternal(QString *out, const QString &in)
term = top.terminator;
context = top.context;
argc = top.argc;
litCount = top.litCount;
expCount = top.expCount;
xprStack.resize(xprStack.size() - 1);
}
if (term == ':') {
@@ -1070,7 +1081,8 @@ bool ProFileEvaluator::Private::readInternal(QString *out, const QString &in)
putBlock(tokPtr, buf, tlen);
putTok(tokPtr, tok);
context = CtxValue;
ptr = tokPtr;
ptr = ++tokPtr;
litCount = expCount = 0;
needSep = 0;
goto nextToken;
}
@@ -1109,6 +1121,7 @@ bool ProFileEvaluator::Private::readInternal(QString *out, const QString &in)
return false;
}
if (context == CtxValue) {
tokPtr[-1] = litCount ? litCount + expCount : 0;
tokPtr = ptr;
putTok(tokPtr, TokValueTerminator);
} else {
@@ -1837,7 +1850,7 @@ ProFileEvaluator::Private::VisitReturn ProFileEvaluator::Private::visitProLoop(
int index = 0;
ProString variable;
ProStringList oldVarVal;
ProString it_list = expandVariableReferences(exprPtr, true).at(0);
ProString it_list = expandVariableReferences(exprPtr, 0, true).at(0);
if (_variable.isEmpty()) {
if (it_list != statics.strever) {
logMessage(format("Invalid loop expression."));
@@ -1919,6 +1932,8 @@ ProFileEvaluator::Private::VisitReturn ProFileEvaluator::Private::visitProLoop(
void ProFileEvaluator::Private::visitProVariable(
ushort tok, const ProStringList &curr, const ushort *&tokPtr)
{
int sizeHint = *tokPtr++;
if (curr.size() != 1) {
skipExpression(tokPtr);
logMessage(format("Left hand side of assignment must expand to exactly one word."));
@@ -1929,7 +1944,7 @@ void ProFileEvaluator::Private::visitProVariable(
if (tok == TokReplace) { // ~=
// DEFINES ~= s/a/b/?[gqi]
const ProStringList &varVal = expandVariableReferences(tokPtr, true);
const ProStringList &varVal = expandVariableReferences(tokPtr, sizeHint, true);
const QString &val = varVal.at(0).toQString(m_tmp1);
if (val.length() < 4 || val.at(0) != QLatin1Char('s')) {
logMessage(format("the ~= operator can handle only the s/// function."));
@@ -1962,7 +1977,7 @@ void ProFileEvaluator::Private::visitProVariable(
replaceInList(&m_filevaluemap[currentProFile()][varName], regexp, replace, global, m_tmp2);
}
} else {
ProStringList varVal = expandVariableReferences(tokPtr);
ProStringList varVal = expandVariableReferences(tokPtr, sizeHint);
switch (tok) {
default: // whatever - cannot happen
case TokAssign: // =
@@ -2641,9 +2656,10 @@ bool ProFileEvaluator::Private::isActiveConfig(const QString &config, bool regex
}
ProStringList ProFileEvaluator::Private::expandVariableReferences(
const ushort *&tokPtr, bool joined)
const ushort *&tokPtr, int sizeHint, bool joined)
{
ProStringList ret;
ret.reserve(sizeHint);
forever {
evaluateExpression(tokPtr, &ret, joined);
switch (*tokPtr) {
@@ -2761,7 +2777,7 @@ ProStringList ProFileEvaluator::Private::evaluateExpandFunction(
return evaluateFunction(*it, prepareFunctionArgs(tokPtr), 0);
//why don't the builtin functions just use args_list? --Sam
return evaluateExpandFunction(func, expandVariableReferences(tokPtr, true));
return evaluateExpandFunction(func, expandVariableReferences(tokPtr, 5, true));
}
ProStringList ProFileEvaluator::Private::evaluateExpandFunction(
@@ -3179,7 +3195,7 @@ ProFileEvaluator::Private::VisitReturn ProFileEvaluator::Private::evaluateCondit
return evaluateBoolFunction(*it, prepareFunctionArgs(tokPtr), function);
//why don't the builtin functions just use args_list? --Sam
return evaluateConditionalFunction(function, expandVariableReferences(tokPtr, true));
return evaluateConditionalFunction(function, expandVariableReferences(tokPtr, 5, true));
}
ProFileEvaluator::Private::VisitReturn ProFileEvaluator::Private::evaluateConditionalFunction(