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add QMakeParser::ValueGrammar

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this is a reduced RHS grammar to be used with
expandVariablesReferences() to implement the expansions in
QMAKE_SUBSTITUTES.
using the parser+evaluator for that is consistently up to 25% slower
than a purely interpreted approach - except for plain strings (with some
quoting), which happens to be exactly what is found in the template
files to substitute.

Change-Id: I219266460b970c6ddcb43cf85a914fbde6540271
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
This commit is contained in:
Oswald Buddenhagen
2012-07-31 12:04:24 +02:00
parent 98afdc9279
commit ed74556444
2 changed files with 43 additions and 17 deletions
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56
src/shared/proparser/qmakeparser.cpp
View File

@@ -319,7 +319,6 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
m_operator = NoOperator;
m_markLine = m_lineNo;
m_inError = false;
Context context = CtxTest;
int parens = 0; // Braces in value context
int argc = 0;
int wordCount = 0; // Number of words in currently accumulated expression
@@ -330,8 +329,15 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
ushort quote = 0;
ushort term = 0;
ushort *ptr = buf;
ptr += 4;
Context context;
ushort *ptr;
if (grammar == ValueGrammar) {
context = CtxPureValue;
ptr = tokPtr + 2;
} else {
context = CtxTest;
ptr = buf + 4;
}
ushort *xprPtr = ptr;
#define FLUSH_LHS_LITERAL() \
@@ -383,11 +389,23 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
putTok(tokPtr, TokValueTerminator); \
} while (0)
const ushort *end; // End of this line
const ushort *cptr; // Start of next line
bool lineCont;
int indent;
if (context == CtxPureValue) {
end = (const ushort *)in.unicode() + in.length();
cptr = 0;
lineCont = false;
indent = 0; // just gcc being stupid
goto nextChr;
}
forever {
ushort c;
// First, skip leading whitespace
int indent;
for (indent = 0; ; ++cur, ++indent) {
c = *cur;
if (c == '\n') {
@@ -402,8 +420,6 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
}
// Then strip comments. Yep - no escaping is possible.
const ushort *end; // End of this line
const ushort *cptr; // Start of next line
for (cptr = cur;; ++cptr) {
c = *cptr;
if (c == '#') {
@@ -432,7 +448,6 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
}
// Then look for line continuations. Yep - no escaping here as well.
bool lineCont;
forever {
// We don't have to check for underrun here, as we already determined
// that the line is non-empty.
@@ -592,7 +607,7 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
*ptr++ = ' ';
}
goto nextChr;
} else if (c == ' ' || c == '\t') {
} else if ((c == ' ' || c == '\t') && context != CtxPureValue) {
putSpace = true;
goto nextChr;
} else if (c == '!' && ptr == xprPtr && context == CtxTest) {
@@ -602,12 +617,12 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
} else if (c == '\'' || c == '"') {
quote = c;
goto nextChr;
} else if (c == ' ' || c == '\t') {
FLUSH_LITERAL();
goto nextWord;
} else if (context == CtxArgs) {
// Function arg context
if (c == '(') {
if (c == ' ' || c == '\t') {
FLUSH_RHS_LITERAL();
goto nextWord;
} else if (c == '(') {
++parens;
} else if (c == ')') {
if (--parens < 0) {
@@ -643,7 +658,10 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
}
} else if (context == CtxTest) {
// Test or LHS context
if (c == '(') {
if (c == ' ' || c == '\t') {
FLUSH_LHS_LITERAL();
goto nextWord;
} else if (c == '(') {
FLUSH_LHS_LITERAL();
if (wordCount != 1) {
if (wordCount)
@@ -739,8 +757,11 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
ptr = ++tokPtr;
goto nextToken;
}
} else { // context == CtxValue
if (c == '{') {
} else if (context == CtxValue) {
if (c == ' ' || c == '\t') {
FLUSH_RHS_LITERAL();
goto nextWord;
} else if (c == '{') {
++parens;
} else if (c == '}') {
if (!parens) {
@@ -796,6 +817,8 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
if (context == CtxValue) {
tokPtr[-1] = 0; // sizehint
putTok(tokPtr, TokValueTerminator);
} else if (context == CtxPureValue) {
putTok(tokPtr, TokValueTerminator);
} else {
bogusTest(tokPtr);
}
@@ -803,6 +826,9 @@ bool QMakeParser::read(ProFile *pro, const QString &in, int line, SubGrammar gra
FLUSH_VALUE_LIST();
if (parens)
languageWarning(fL1S("Possible braces mismatch"));
} else if (context == CtxPureValue) {
tokPtr = ptr;
putTok(tokPtr, TokValueTerminator);
} else {
finalizeCond(tokPtr, buf, ptr, wordCount);
}