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cppcheck
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Removed ExecutionPath

This commit is contained in:
Daniel Marjamäki 2015-07-23 19:01:12 +02:00
parent 3dbf290220
commit c2a15ac286
7 changed files with 1 additions and 645 deletions
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6
Makefile
View File

@ -144,7 +144,6 @@ LIBOBJ = $(SRCDIR)/check.o \
$(SRCDIR)/checkvaarg.o \
$(SRCDIR)/cppcheck.o \
$(SRCDIR)/errorlogger.o \
$(SRCDIR)/executionpath.o \
$(SRCDIR)/library.o \
$(SRCDIR)/mathlib.o \
$(SRCDIR)/path.o \
@ -343,7 +342,7 @@ $(SRCDIR)/checkpostfixoperator.o: lib/checkpostfixoperator.cpp lib/cxx11emu.h li
$(SRCDIR)/checksizeof.o: lib/checksizeof.cpp lib/cxx11emu.h lib/checksizeof.h lib/config.h lib/check.h lib/token.h lib/valueflow.h lib/mathlib.h lib/tokenize.h lib/errorlogger.h lib/suppressions.h lib/tokenlist.h lib/settings.h lib/library.h lib/standards.h lib/timer.h lib/symboldatabase.h lib/utils.h
$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CFG) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -std=c++0x -c -o $(SRCDIR)/checksizeof.o $(SRCDIR)/checksizeof.cpp
$(SRCDIR)/checkstl.o: lib/checkstl.cpp lib/cxx11emu.h lib/checkstl.h lib/config.h lib/check.h lib/token.h lib/valueflow.h lib/mathlib.h lib/tokenize.h lib/errorlogger.h lib/suppressions.h lib/tokenlist.h lib/settings.h lib/library.h lib/standards.h lib/timer.h lib/executionpath.h lib/symboldatabase.h lib/utils.h lib/checknullpointer.h
$(SRCDIR)/checkstl.o: lib/checkstl.cpp lib/cxx11emu.h lib/checkstl.h lib/config.h lib/check.h lib/token.h lib/valueflow.h lib/mathlib.h lib/tokenize.h lib/errorlogger.h lib/suppressions.h lib/tokenlist.h lib/settings.h lib/library.h lib/standards.h lib/timer.h lib/symboldatabase.h lib/utils.h lib/checknullpointer.h
$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CFG) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -std=c++0x -c -o $(SRCDIR)/checkstl.o $(SRCDIR)/checkstl.cpp
$(SRCDIR)/checkstring.o: lib/checkstring.cpp lib/cxx11emu.h lib/checkstring.h lib/config.h lib/check.h lib/token.h lib/valueflow.h lib/mathlib.h lib/tokenize.h lib/errorlogger.h lib/suppressions.h lib/tokenlist.h lib/settings.h lib/library.h lib/standards.h lib/timer.h lib/symboldatabase.h lib/utils.h
@ -370,9 +369,6 @@ $(SRCDIR)/cppcheck.o: lib/cppcheck.cpp lib/cxx11emu.h lib/cppcheck.h lib/config.
$(SRCDIR)/errorlogger.o: lib/errorlogger.cpp lib/cxx11emu.h lib/errorlogger.h lib/config.h lib/suppressions.h lib/path.h lib/cppcheck.h lib/settings.h lib/library.h lib/mathlib.h lib/token.h lib/valueflow.h lib/standards.h lib/timer.h lib/check.h lib/tokenize.h lib/tokenlist.h
$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CFG) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -std=c++0x -c -o $(SRCDIR)/errorlogger.o $(SRCDIR)/errorlogger.cpp
$(SRCDIR)/executionpath.o: lib/executionpath.cpp lib/cxx11emu.h lib/executionpath.h lib/config.h lib/token.h lib/valueflow.h lib/mathlib.h lib/symboldatabase.h lib/utils.h
$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CFG) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -std=c++0x -c -o $(SRCDIR)/executionpath.o $(SRCDIR)/executionpath.cpp
$(SRCDIR)/library.o: lib/library.cpp lib/cxx11emu.h lib/library.h lib/config.h lib/mathlib.h lib/token.h lib/valueflow.h lib/path.h lib/tokenlist.h lib/symboldatabase.h lib/utils.h
$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CFG) $(CXXFLAGS) $(UNDEF_STRICT_ANSI) -std=c++0x -c -o $(SRCDIR)/library.o $(SRCDIR)/library.cpp

2
cppcheck.cbp
View File

@ -144,8 +144,6 @@
<Unit filename="lib/cppcheck.h" />
<Unit filename="lib/errorlogger.cpp" />
<Unit filename="lib/errorlogger.h" />
<Unit filename="lib/executionpath.cpp" />
<Unit filename="lib/executionpath.h" />
<Unit filename="lib/mathlib.cpp" />
<Unit filename="lib/mathlib.h" />
<Unit filename="lib/path.cpp" />

2
lib/cppcheck.vcxproj
View File

@ -65,7 +65,6 @@
<ClCompile Include="checkvaarg.cpp" />
<ClCompile Include="cppcheck.cpp" />
<ClCompile Include="errorlogger.cpp" />
<ClCompile Include="executionpath.cpp" />
<ClCompile Include="library.cpp" />
<ClCompile Include="mathlib.cpp" />
<ClCompile Include="path.cpp" />
@ -112,7 +111,6 @@
<ClInclude Include="config.h" />
<ClInclude Include="cppcheck.h" />
<ClInclude Include="errorlogger.h" />
<ClInclude Include="executionpath.h" />
<ClInclude Include="library.h" />
<ClInclude Include="mathlib.h" />
<ClInclude Include="path.h" />

6
lib/cppcheck.vcxproj.filters
View File

@ -65,9 +65,6 @@
<ClCompile Include="errorlogger.cpp">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="executionpath.cpp">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="mathlib.cpp">
<Filter>Source Files</Filter>
</ClCompile>
@ -193,9 +190,6 @@
<ClInclude Include="errorlogger.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="executionpath.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="mathlib.h">
<Filter>Header Files</Filter>
</ClInclude>

491
lib/executionpath.cpp
View File

@ -1,491 +0,0 @@
/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2015 Daniel Marjamäki and Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "executionpath.h"
#include "token.h"
#include "symboldatabase.h"
#include <memory>
#include <set>
#include <iterator>
#include <iostream>
// default : bail out if the condition is has variable handling
bool ExecutionPath::parseCondition(const Token &tok, std::list<ExecutionPath *> & checks)
{
unsigned int parlevel = 0;
for (const Token *tok2 = &tok; tok2; tok2 = tok2->next()) {
if (tok2->str() == "(")
++parlevel;
else if (tok2->str() == ")") {
if (parlevel == 0)
break;
--parlevel;
} else if (Token::Match(tok2, "[;{}]"))
break;
if (tok2->varId() != 0) {
bailOutVar(checks, tok2->varId());
}
}
for (std::list<ExecutionPath *>::iterator it = checks.begin(); it != checks.end();) {
if ((*it)->varId > 0 && (*it)->numberOfIf >= 1) {
delete *it;
checks.erase(it++);
} else {
++it;
}
}
return false;
}
void ExecutionPath::print() const
{
std::cout << " varId=" << varId
<< " numberOfIf=" << numberOfIf
<< "\n";
}
// I use this function when debugging ExecutionPaths with GDB
/*
static void printchecks(const std::list<ExecutionPath *> &checks)
{
for (std::list<ExecutionPath *>::const_iterator it = checks.begin(); it != checks.end(); ++it)
(*it)->print();
}
*/
/**
* @brief Parse If/Switch body recursively.
* @param tok First token in body.
* @param checks The current checks
* @param newchecks new checks
* @param countif The countif set - count number of if for each execution path
*/
static void parseIfSwitchBody(const Token * const tok,
const std::list<ExecutionPath *> &checks,
std::list<ExecutionPath *> &newchecks,
std::set<unsigned int> &countif)
{
std::set<unsigned int> countif2;
std::list<ExecutionPath *> c;
if (!checks.empty()) {
std::list<ExecutionPath *>::const_iterator it;
for (it = checks.begin(); it != checks.end(); ++it) {
if ((*it)->numberOfIf == 0)
c.push_back((*it)->copy());
if ((*it)->varId != 0)
countif2.insert((*it)->varId);
}
}
ExecutionPath::checkScope(tok, c);
while (!c.empty()) {
if (c.back()->varId == 0) {
delete c.back();
c.pop_back();
continue;
}
bool duplicate = false;
std::list<ExecutionPath *>::const_iterator it;
for (it = checks.begin(); it != checks.end(); ++it) {
if (*(*it) == *c.back() && (*it)->numberOfIf == c.back()->numberOfIf) {
duplicate = true;
countif2.erase((*it)->varId);
break;
}
}
if (!duplicate)
newchecks.push_back(c.back());
else
delete c.back();
c.pop_back();
}
// Add countif2 ids to countif.. countif.
countif.insert(countif2.begin(), countif2.end());
}
void ExecutionPath::checkScope(const Token *tok, std::list<ExecutionPath *> &checks)
{
if (!tok || tok->str() == "}" || checks.empty())
return;
const std::auto_ptr<ExecutionPath> check(checks.front()->copy());
for (; tok; tok = tok->next()) {
// might be a noreturn function..
if (Token::simpleMatch(tok->tokAt(-2), ") ; }") &&
Token::Match(tok->linkAt(-2)->tokAt(-2), "[;{}] %name% (") &&
tok->linkAt(-2)->previous()->varId() == 0) {
ExecutionPath::bailOut(checks);
return;
}
// ({ is not handled well
if (Token::simpleMatch(tok, "( {")) {
ExecutionPath::bailOut(checks);
return;
}
if (Token::simpleMatch(tok, "union {")) {
tok = tok->next()->link();
continue;
}
if (tok->str() == "}")
return;
if (tok->str() == "break") {
ExecutionPath::bailOut(checks);
return;
}
if (Token::simpleMatch(tok, "while (")) {
// parse condition
if (checks.size() > 10 || check->parseCondition(*tok->tokAt(2), checks)) {
ExecutionPath::bailOut(checks);
return;
}
// skip "while (fgets()!=NULL)"
if (Token::simpleMatch(tok, "while ( fgets (")) {
const Token *tok2 = tok->linkAt(3);
if (Token::simpleMatch(tok2, ") ) {")) {
tok = tok2->linkAt(2);
if (!tok)
break;
continue;
}
}
}
// goto/setjmp/longjmp => bailout
else if (Token::Match(tok, "goto|setjmp|longjmp")) {
ExecutionPath::bailOut(checks);
return;
}
// ?: => bailout
if (tok->str() == "?") {
for (const Token *tok2 = tok; tok2 && tok2->str() != ";"; tok2 = tok2->next()) {
if (tok2->varId() > 0)
ExecutionPath::bailOutVar(checks, tok2->varId());
}
}
// for/while/switch/do .. bail out
else if (Token::Match(tok, "for|while|switch|do")) {
// goto {
const Token *tok2 = tok->next();
if (tok2 && tok2->str() == "(")
tok2 = tok2->link();
if (tok2 && tok2->str() == ")")
tok2 = tok2->next();
if (!tok2 || tok2->str() != "{") {
ExecutionPath::bailOut(checks);
return;
}
if (tok->str() == "switch") {
// parse condition
if (checks.size() > 10 || check->parseCondition(*tok->next(), checks)) {
ExecutionPath::bailOut(checks);
return;
}
// what variable ids should the if be counted for?
std::set<unsigned int> countif;
std::list<ExecutionPath *> newchecks;
for (const Token* tok3 = tok2->next(); tok3; tok3 = tok3->next()) {
if (tok3->str() == "{")
tok3 = tok3->link();
else if (tok3->str() == "}")
break;
else if (tok3->str() == "case" &&
!Token::Match(tok3, "case %num% : ; case")) {
parseIfSwitchBody(tok3, checks, newchecks, countif);
}
}
// Add newchecks to checks..
std::copy(newchecks.begin(), newchecks.end(), std::back_inserter(checks));
// Increase numberOfIf
std::list<ExecutionPath *>::iterator it;
for (it = checks.begin(); it != checks.end(); ++it) {
if (countif.find((*it)->varId) != countif.end())
(*it)->numberOfIf++;
}
}
// no switch
else {
for (const Token *tok3 = tok; tok3 && tok3 != tok2; tok3 = tok3->next()) {
if (tok3->varId())
ExecutionPath::bailOutVar(checks, tok3->varId());
}
// it is not certain that a for/while will be executed:
for (std::list<ExecutionPath *>::iterator it = checks.begin(); it != checks.end();) {
if ((*it)->numberOfIf > 0) {
delete *it;
checks.erase(it++);
} else
++it;
}
// #2231 - loop body only contains a conditional initialization..
if (Token::simpleMatch(tok2->next(), "if (")) {
// Start { for the if block
const Token *tok3 = tok2->linkAt(2);
if (Token::simpleMatch(tok3,") {")) {
tok3 = tok3->next();
// End } for the if block
const Token *tok4 = tok3->link();
if (Token::Match(tok3, "{ %name% =") &&
Token::simpleMatch(tok4, "} }") &&
Token::simpleMatch(tok4->tokAt(-2), "break ;")) {
// Is there a assignment and then a break?
const Token *t = Token::findsimplematch(tok3, ";");
if (t && t->tokAt(3) == tok4) {
for (std::list<ExecutionPath *>::iterator it = checks.begin(); it != checks.end(); ++it) {
if ((*it)->varId == tok3->next()->varId()) {
(*it)->numberOfIf++;
break;
}
}
tok = tok2->link();
continue;
}
}
}
}
// parse loop bodies
check->parseLoopBody(tok2->next(), checks);
}
// skip { .. }
tok2 = tok2->link();
// if "do { .. } while ( .." , goto end of while..
if (Token::simpleMatch(tok, "do {") && Token::simpleMatch(tok2, "} while ("))
tok2 = tok2->linkAt(2);
// bail out all variables if the scope contains a "return"
// bail out all variables used in this for/while/switch/do
for (; tok && tok != tok2; tok = tok->next()) {
if (tok->str() == "return")
ExecutionPath::bailOut(checks);
if (tok->varId())
ExecutionPath::bailOutVar(checks, tok->varId());
}
continue;
}
// bailout used variables in '; FOREACH ( .. ) { .. }'
else if (tok->str() != "if" && Token::Match(tok->previous(), "[;{}] %name% (")) {
// goto {
const Token *tok2 = tok->next()->link()->next();
if (tok2 && tok2->str() == "{") {
// goto "}"
tok2 = tok2->link();
// bail out all variables used in "{ .. }"
for (; tok && tok != tok2; tok = tok->next()) {
if (tok->varId())
ExecutionPath::bailOutVar(checks, tok->varId());
}
if (!tok)
break;
}
}
// .. ) { ... } => bail out
if (tok->str() == ")" && tok->next() && tok->next()->str() == "{") {
ExecutionPath::bailOut(checks);
return;
}
if ((tok->str() == "abort" || tok->str() == "exit") &&
tok->next() && tok->next()->str() == "(") {
ExecutionPath::bailOut(checks);
return;
}
// don't parse into "struct type { .."
if (Token::Match(tok, "struct|union|class %type% {|:")) {
while (tok && tok->str() != "{" && tok->str() != ";")
tok = tok->next();
tok = tok ? tok->link() : 0;
if (!tok) {
ExecutionPath::bailOut(checks);
return;
}
}
if (Token::simpleMatch(tok, "= {")) {
// GCC struct initialization.. bail out
if (Token::Match(tok->tokAt(2), ". %name% =")) {
ExecutionPath::bailOut(checks);
return;
}
const Token * const end = tok->next()->link();
while (tok && tok != end) {
if (Token::Match(tok, "[{,] & %var% [,}]"))
ExecutionPath::bailOutVar(checks, tok->tokAt(2)->varId());
tok = tok->next();
}
if (!tok) {
ExecutionPath::bailOut(checks);
return;
}
continue;
}
// ; { ... }
if (Token::Match(tok->previous(), "[;{}:] {")) {
ExecutionPath::checkScope(tok->next(), checks);
tok = tok->link();
continue;
}
if (tok->str() == "if" && tok->next() && tok->next()->str() == "(") {
// what variable ids should the numberOfIf be counted for?
std::set<unsigned int> countif;
std::list<ExecutionPath *> newchecks;
while (tok->str() == "if" && tok->next() && tok->next()->str() == "(") {
// goto "("
tok = tok->next();
// parse condition
if (checks.size() > 10 || check->parseCondition(*tok->next(), checks)) {
ExecutionPath::bailOut(checks);
ExecutionPath::bailOut(newchecks);
return;
}
// goto ")"
tok = tok->link();
// goto "{"
tok = tok->next();
if (!tok || tok->str() != "{") {
ExecutionPath::bailOut(checks);
ExecutionPath::bailOut(newchecks);
return;
}
// Recursively check into the if ..
parseIfSwitchBody(tok->next(), checks, newchecks, countif);
// goto "}"
tok = tok->link();
// there is no else => break out
if (!tok->next() || tok->next()->str() != "else")
break;
// parse next "if"..
tok = tok->tokAt(2);
if (!tok) {
ExecutionPath::bailOut(newchecks);
return;
}
if (tok->str() == "if")
continue;
// there is no "if"..
ExecutionPath::checkScope(tok->next(), checks);
tok = tok->link();
if (!tok) {
ExecutionPath::bailOut(newchecks);
return;
}
}
// Add newchecks to checks..
std::copy(newchecks.begin(), newchecks.end(), std::back_inserter(checks));
// Increase numberOfIf
std::list<ExecutionPath *>::iterator it;
for (it = checks.begin(); it != checks.end(); ++it) {
if (countif.find((*it)->varId) != countif.end())
(*it)->numberOfIf++;
}
// Delete checks that have numberOfIf >= 2
for (it = checks.begin(); it != checks.end();) {
if ((*it)->varId > 0 && (*it)->numberOfIf >= 2) {
delete *it;
checks.erase(it++);
} else {
++it;
}
}
}
tok = check->parse(*tok, checks);
if (!tok || checks.empty())
return;
// return/throw ends all execution paths
if (tok->str() == "return" ||
tok->str() == "throw" ||
tok->str() == "continue" ||
tok->str() == "break") {
ExecutionPath::bailOut(checks);
}
}
}
void checkExecutionPaths(const SymbolDatabase *symbolDatabase, ExecutionPath *c)
{
for (std::list<Scope>::const_iterator i = symbolDatabase->scopeList.begin(); i != symbolDatabase->scopeList.end(); ++i) {
if (i->type != Scope::eFunction || !i->classStart)
continue;
// Check function
std::list<ExecutionPath *> checks;
checks.push_back(c->copy());
ExecutionPath::checkScope(i->classStart, checks);
c->end(checks, i->classEnd);
// Cleanup
while (!checks.empty()) {
delete checks.back();
checks.pop_back();
}
}
}

137
lib/executionpath.h
View File

@ -1,137 +0,0 @@
/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2015 Daniel Marjamäki and Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
//---------------------------------------------------------------------------
#ifndef executionpathH
#define executionpathH
//---------------------------------------------------------------------------
#include <list>
#include "config.h"
class Token;
class Check;
class SymbolDatabase;
/**
* Base class for Execution Paths checking
* An execution path is a linear list of statements. There are no "if"/.. to worry about.
**/
class CPPCHECKLIB ExecutionPath {
private:
/** No implementation */
ExecutionPath();
ExecutionPath& operator=(const ExecutionPath &);
protected:
Check * const owner;
/** Are two execution paths equal? */
virtual bool is_equal(const ExecutionPath *) const = 0;
public:
ExecutionPath(Check *c, unsigned int id) : owner(c), numberOfIf(0), varId(id) {
}
virtual ~ExecutionPath() {
}
/** Implement this in each derived class. This function must create a copy of the current instance */
virtual ExecutionPath *copy() = 0;
/** print checkdata */
void print() const;
/** number of if blocks */
unsigned int numberOfIf;
const unsigned int varId;
/**
* bail out all execution paths
* @param checks the execution paths to bail out on
**/
static void bailOut(std::list<ExecutionPath *> &checks) {
while (!checks.empty()) {
delete checks.back();
checks.pop_back();
}
}
/**
* bail out execution paths with given variable id
* @param checks the execution paths to bail out on
* @param varid the specific variable id
**/
static void bailOutVar(std::list<ExecutionPath *> &checks, const unsigned int varid) {
if (varid == 0)
return;
std::list<ExecutionPath *>::iterator it = checks.begin();
while (it != checks.end()) {
if ((*it)->varId == varid) {
delete *it;
checks.erase(it++);
} else {
++it;
}
}
}
/**
* Parse tokens at given location
* @param tok token to parse
* @param checks The execution paths. All execution paths in the list are executed in the current scope.
* @return the token before the "next" token.
**/
virtual const Token *parse(const Token &tok, std::list<ExecutionPath *> &checks) const = 0;
/**
* Parse condition
* @param tok first token in condition.
* @param checks The execution paths. All execution paths in the list are executed in the current scope
* @return true => bail out all checking
**/
virtual bool parseCondition(const Token &tok, std::list<ExecutionPath *> &checks);
/**
* Parse loop body
* @param tok the first token in the loop body (the token after the {)
* @param checks The execution paths
*/
virtual void parseLoopBody(const Token *tok, std::list<ExecutionPath *> &checks) const {
(void)tok;
(void)checks;
}
/** going out of scope - all execution paths end */
virtual void end(const std::list<ExecutionPath *> & /*checks*/, const Token * /*tok*/) const {
}
bool operator==(const ExecutionPath &e) const {
return bool(varId == e.varId && is_equal(&e));
}
static void checkScope(const Token *tok, std::list<ExecutionPath *> &checks);
};
void checkExecutionPaths(const SymbolDatabase *symbolDatabase, ExecutionPath *c);
//---------------------------------------------------------------------------
#endif // executionpathH

2
lib/lib.pri
View File

@ -35,7 +35,6 @@ HEADERS += $${BASEPATH}check.h \
$${BASEPATH}checkvaarg.h \
$${BASEPATH}cppcheck.h \
$${BASEPATH}errorlogger.h \
$${BASEPATH}executionpath.h \
$${BASEPATH}library.h \
$${BASEPATH}mathlib.h \
$${BASEPATH}path.h \
@ -80,7 +79,6 @@ SOURCES += $${BASEPATH}check.cpp \
$${BASEPATH}checkvaarg.cpp \
$${BASEPATH}cppcheck.cpp \
$${BASEPATH}errorlogger.cpp \
$${BASEPATH}executionpath.cpp \
$${BASEPATH}library.cpp \
$${BASEPATH}mathlib.cpp \
$${BASEPATH}path.cpp \