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automoc: another runtime optimization 

before doing the full regexp, try a simple strstr(), if this
already fails, no need to do the regexp matching.

Alex
This commit is contained in:
Alex Neundorf 2011-11-10 22:54:44 +01:00
parent 1423177828
commit e44ebd5f9b
1 changed files with 23 additions and 6 deletions
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29
Source/cmQtAutomoc.cxx
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@ -17,11 +17,26 @@
#include "cmSourceFile.h"
#include "cmSystemTools.h"
# include <cmsys/Terminal.h>
#include <cmsys/Terminal.h>
#include <string.h>
#include "cmQtAutomoc.h"
static bool containsQ_OBJECT(const std::string& text)
{
// this simple check is much much faster than the regexp
if (strstr(text.c_str(), "Q_OBJECT") == NULL)
{
return false;
}
cmsys::RegularExpression qObjectRegExp("[\n][ \t]*Q_OBJECT[^a-zA-Z0-9_]");
return qObjectRegExp.find(text);
}
cmQtAutomoc::cmQtAutomoc()
:Verbose(cmsys::SystemTools::GetEnv("VERBOSE") != 0)
,ColorOutput(true)
@ -527,7 +542,11 @@ void cmQtAutomoc::ParseCppFile(const std::string& absFilename,
std::string ownMocHeaderFile;
std::string::size_type matchOffset = 0;
if (mocIncludeRegExp.find(contentsString))
// first a simply string check for "moc" is *much* faster than the regexp,
// and if the string search already fails, we don't have to try the
// expensive regexp
if ((strstr(contentsString.c_str(), "moc") != NULL)
&& (mocIncludeRegExp.find(contentsString)))
{
// for every moc include in the file
do
@ -635,8 +654,7 @@ void cmQtAutomoc::ParseCppFile(const std::string& absFilename,
// But warn, since this is not how it is supposed to be used.
if ((dotMocIncluded == false) && (mocUnderscoreIncluded == true))
{
cmsys::RegularExpression qObjectRegExp("[\n][ \t]*Q_OBJECT[^a-zA-Z0-9_]");
if (qObjectRegExp.find(contentsString))
if (containsQ_OBJECT(contentsString))
{
std::cerr << "AUTOMOC: warning: " << absFilename << ": The file "
<< "contains a Q_OBJECT macro, but does not include "
@ -683,7 +701,6 @@ void cmQtAutomoc::ParseHeaders(const std::set<std::string>& absHeaders,
const std::map<std::string, std::string>& includedMocs,
std::map<std::string, std::string>& notIncludedMocs)
{
cmsys::RegularExpression qObjectRegExp("[\n][ \t]*Q_OBJECT[^a-zA-Z0-9_]");
for(std::set<std::string>::const_iterator hIt=absHeaders.begin();
hIt!=absHeaders.end();
++hIt)
@ -702,7 +719,7 @@ void cmQtAutomoc::ParseHeaders(const std::set<std::string>& absHeaders,
const std::string currentMoc = "moc_" + basename + ".cpp";
const std::string contents = this->ReadAll(headerName);
if (qObjectRegExp.find(contents))
if (containsQ_OBJECT(contents))
{
//std::cout << "header contains Q_OBJECT macro";
notIncludedMocs[headerName] = currentMoc;