cppcheck/lib/symboldatabase.h

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2013 Daniel Marjamäki and Cppcheck team.
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*
* 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 SymbolDatabaseH
#define SymbolDatabaseH
//---------------------------------------------------------------------------
#include <string>
#include <list>
#include <vector>
#include <set>
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#include "config.h"
#include "token.h"
#include "mathlib.h"
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class Tokenizer;
class Settings;
class ErrorLogger;
class Scope;
class SymbolDatabase;
/**
* @brief Access control enumerations.
*/
enum AccessControl { Public, Protected, Private, Global, Namespace, Argument, Local, Throw };
/**
* @brief Array dimension information.
*/
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struct Dimension {
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Dimension() : start(NULL), end(NULL), num(0), known(true) { }
const Token *start; // size start token
const Token *end; // size end token
MathLib::bigint num; // (assumed) dimension length when size is a number, 0 if not known
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bool known; // Known size
};
/** @brief Information about a class type. */
class CPPCHECKLIB Type {
public:
const Token* classDef; // Points to "class" token
const Scope* classScope;
const Scope* enclosingScope;
enum NeedInitialization {
Unknown, True, False
} needInitialization;
struct BaseInfo {
std::string name;
const Type* type;
const Token* nameTok;
AccessControl access; // public/protected/private
bool isVirtual;
};
struct FriendInfo {
const Token* nameStart;
const Token* nameEnd;
std::string name;
const Type* type;
};
std::vector<BaseInfo> derivedFrom;
std::list<FriendInfo> friendList;
Type(const Token* classDef_ = 0, const Scope* classScope_ = 0, const Scope* enclosingScope_ = 0) :
classDef(classDef_),
classScope(classScope_),
enclosingScope(enclosingScope_),
needInitialization(Unknown) {
}
const std::string& name() const {
static const std::string empty;
return classDef->next()->isName() ? classDef->strAt(1) : empty;
}
const Token *initBaseInfo(const Token *tok, const Token *tok1);
const Function* getFunction(const std::string& funcName) const;
};
/** @brief Information about a member variable. */
class CPPCHECKLIB Variable {
/** @brief flags mask used to access specific bit. */
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enum {
fIsMutable = (1 << 0), /** @brief mutable variable */
fIsStatic = (1 << 1), /** @brief static variable */
fIsConst = (1 << 2), /** @brief const variable */
fIsExtern = (1 << 3), /** @brief extern variable */
fIsClass = (1 << 4), /** @brief user defined type */
fIsArray = (1 << 5), /** @brief array variable */
fIsPointer = (1 << 6), /** @brief pointer variable */
fIsReference = (1 << 7), /** @brief reference variable */
fIsRValueRef = (1 << 8), /** @brief rvalue reference variable */
fHasDefault = (1 << 9) /** @brief function argument with default value */
};
/**
* Get specified flag state.
* @param flag_ flag to get state of
* @return true if flag set or false in flag not set
*/
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bool getFlag(int flag_) const {
return bool((_flags & flag_) != 0);
}
/**
* Set specified flag state.
* @param flag_ flag to set state
* @param state_ new state of flag
*/
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void setFlag(int flag_, bool state_) {
_flags = state_ ? _flags | flag_ : _flags & ~flag_;
}
/**
* @brief parse and save array dimension information
* @param dimensions array dimensions vector
* @param tok the first '[' token of array declaration
* @return true if array, false if not
*/
static bool arrayDimensions(std::vector<Dimension> &dimensions, const Token *tok);
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public:
Variable(const Token *name_, const Token *start_, const Token *end_,
std::size_t index_, AccessControl access_, const Type *type_,
const Scope *scope_)
: _name(name_),
_start(start_),
_end(end_),
_index(index_),
_access(access_),
_flags(0),
_type(type_),
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_scope(scope_) {
evaluate();
}
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/**
* Get name token.
* @return name token
*/
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const Token *nameToken() const {
return _name;
}
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/**
* Get type start token.
* @return type start token
*/
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const Token *typeStartToken() const {
return _start;
}
/**
* Get type end token.
* @return type end token
*/
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const Token *typeEndToken() const {
return _end;
}
/**
* Get name string.
* @return name string
*/
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const std::string &name() const {
static const std::string noname;
// name may not exist for function arguments
if (_name)
return _name->str();
return noname;
}
/**
* Get declaration ID (varId used for variable in its declaration).
* @return declaration ID
*/
unsigned int declarationId() const {
// name may not exist for function arguments
if (_name)
return _name->varId();
return 0;
}
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/**
* Get index of variable in declared order.
* @return variable index
*/
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std::size_t index() const {
return _index;
}
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/**
* Is variable public.
* @return true if public, false if not
*/
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bool isPublic() const {
return _access == Public;
}
/**
* Is variable protected.
* @return true if protected, false if not
*/
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bool isProtected() const {
return _access == Protected;
}
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/**
* Is variable private.
* @return true if private, false if not
*/
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bool isPrivate() const {
return _access == Private;
}
/**
* Is variable global.
* @return true if global, false if not
*/
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bool isGlobal() const {
return _access == Global;
}
/**
* Is variable in a namespace.
* @return true if in a namespace, false if not
*/
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bool isNamespace() const {
return _access == Namespace;
}
/**
* Is variable a function argument.
* @return true if a function argument, false if not
*/
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bool isArgument() const {
return _access == Argument;
}
/**
* Is variable local.
* @return true if local, false if not
*/
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bool isLocal() const {
return (_access == Local) && !isExtern();
}
/**
* Is variable mutable.
* @return true if mutable, false if not
*/
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bool isMutable() const {
return getFlag(fIsMutable);
}
/**
* Is variable static.
* @return true if static, false if not
*/
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bool isStatic() const {
return getFlag(fIsStatic);
}
/**
* Is variable extern.
* @return true if extern, false if not
*/
bool isExtern() const {
return getFlag(fIsExtern);
}
/**
* Is variable const.
* @return true if const, false if not
*/
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bool isConst() const {
return getFlag(fIsConst);
}
/**
* Is variable a throw type.
* @return true if throw type, false if not
*/
bool isThrow() const {
return _access == Throw;
}
/**
* Is variable a user defined (or unknown) type.
* @return true if user defined type, false if not
*/
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bool isClass() const {
return getFlag(fIsClass);
}
/**
* Is variable an array.
* @return true if array, false if not
*/
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bool isArray() const {
return getFlag(fIsArray);
}
/**
* Is pointer variable.
* @return true if pointer, false otherwise
*/
bool isPointer() const {
return getFlag(fIsPointer);
}
/**
* Is reference variable.
* @return true if reference, false otherwise
*/
bool isReference() const {
return getFlag(fIsReference);
}
/**
* Is reference variable.
* @return true if reference, false otherwise
*/
bool isRValueReference() const {
return getFlag(fIsRValueRef);
}
/**
* Does variable have a default value.
* @return true if has a default falue, false if not
*/
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bool hasDefault() const {
return getFlag(fHasDefault);
}
/**
* Get Type pointer of known type.
* @return pointer to type if known, NULL if not known
*/
const Type *type() const {
return _type;
}
/**
* Get Scope pointer of known type.
* @return pointer to type scope if known, NULL if not known
*/
const Scope *typeScope() const {
return _type ? _type->classScope : 0;
}
/**
* Get Scope pointer of enclosing scope.
* @return pointer to enclosing scope
*/
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const Scope *scope() const {
return _scope;
}
/**
* Get array dimensions.
* @return array dimensions vector
*/
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const std::vector<Dimension> &dimensions() const {
return _dimensions;
}
/**
* Get array dimension length.
* @return length of dimension
*/
MathLib::bigint dimension(std::size_t index_) const {
return _dimensions[index_].num;
}
private:
// only symbol database can change the type
friend class SymbolDatabase;
/**
* Set Type pointer to known type.
* @param t type
*/
void type(const Type * t) {
_type = t;
}
/** @brief variable name token */
const Token *_name;
/** @brief variable type start token */
const Token *_start;
/** @brief variable type end token */
const Token *_end;
/** @brief order declared */
std::size_t _index;
/** @brief what section is this variable declared in? */
AccessControl _access; // public/protected/private
/** @brief flags */
int _flags;
/** @brief pointer to user defined type info (for known types) */
const Type *_type;
/** @brief pointer to scope this variable is in */
const Scope *_scope;
/** @brief array dimensions */
std::vector<Dimension> _dimensions;
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/** @brief fill in information, depending on Tokens given at instantiation */
void evaluate();
};
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class CPPCHECKLIB Function {
public:
enum Type { eConstructor, eCopyConstructor, eMoveConstructor, eOperatorEqual, eDestructor, eFunction };
Function()
: tokenDef(NULL),
argDef(NULL),
token(NULL),
arg(NULL),
functionScope(NULL),
nestedIn(NULL),
initArgCount(0),
type(eFunction),
access(Public),
hasBody(false),
isInline(false),
isConst(false),
isVirtual(false),
isPure(false),
isStatic(false),
isFriend(false),
isExplicit(false),
isDefault(false),
isDelete(false),
isOperator(false),
retFuncPtr(false) {
}
const std::string &name() const {
return tokenDef->str();
}
std::size_t argCount() const {
return argumentList.size();
}
std::size_t minArgCount() const {
return argumentList.size() - initArgCount;
}
const Variable* getArgumentVar(unsigned int num) const;
unsigned int initializedArgCount() const {
return initArgCount;
}
void addArguments(const SymbolDatabase *symbolDatabase, const Scope *scope);
/** @brief check if this function is virtual in the base classes */
bool isImplicitlyVirtual(bool defaultVal = false) const;
bool isConstructor() const {
return type==eConstructor ||
type==eCopyConstructor ||
type==eMoveConstructor;
}
bool isDestructor() const {
return type==eDestructor;
}
const Token *tokenDef; // function name token in class definition
const Token *argDef; // function argument start '(' in class definition
const Token *token; // function name token in implementation
const Token *arg; // function argument start '('
const Scope *functionScope; // scope of function body
const Scope* nestedIn; // Scope the function is declared in
std::list<Variable> argumentList; // argument list
unsigned int initArgCount; // number of args with default values
Type type; // constructor, destructor, ...
AccessControl access; // public/protected/private
bool hasBody; // has implementation
bool isInline; // implementation in class definition
bool isConst; // is const
bool isVirtual; // is virtual
bool isPure; // is pure virtual
bool isStatic; // is static
bool isFriend; // is friend
bool isExplicit; // is explicit
bool isDefault; // is default
bool isDelete; // is delete
bool isOperator; // is operator
bool retFuncPtr; // returns function pointer
static bool argsMatch(const Scope *info, const Token *first, const Token *second, const std::string &path, unsigned int depth);
private:
bool isImplicitlyVirtual_rec(const ::Type* type, bool& safe) const;
};
class CPPCHECKLIB Scope {
// let tests access private function for testing
friend class TestSymbolDatabase;
public:
struct UsingInfo {
const Token *start;
const Scope *scope;
};
enum ScopeType { eGlobal, eClass, eStruct, eUnion, eNamespace, eFunction, eIf, eElse, eElseIf, eFor, eWhile, eDo, eSwitch, eUnconditional, eTry, eCatch };
Scope(const SymbolDatabase *check_, const Token *classDef_, const Scope *nestedIn_);
Scope(const SymbolDatabase *check_, const Token *classDef_, const Scope *nestedIn_, ScopeType type_, const Token *start_);
const SymbolDatabase *check;
std::string className;
const Token *classDef; // class/struct/union/namespace token
const Token *classStart; // '{' token
const Token *classEnd; // '}' token
std::list<Function> functionList;
std::list<Variable> varlist;
const Scope *nestedIn;
std::list<Scope *> nestedList;
unsigned int numConstructors;
unsigned int numCopyOrMoveConstructors;
std::list<UsingInfo> usingList;
ScopeType type;
Type* definedType;
std::list<Type*> definedTypes;
// function specific fields
const Scope *functionOf; // scope this function belongs to
Function *function; // function info for this function
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bool isClassOrStruct() const {
return (type == eClass || type == eStruct);
}
bool isExecutable() const {
return type != eClass && type != eStruct && type != eUnion && type != eGlobal && type != eNamespace;
}
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bool isLocal() const {
return (type == eIf || type == eElse || type == eElseIf ||
type == eFor || type == eWhile || type == eDo ||
type == eSwitch || type == eUnconditional ||
type == eTry || type == eCatch);
}
/**
* @brief find a function
* @param tok token of function call
* @return pointer to function if found or NULL if not found
*/
const Function *findFunction(const Token *tok) const;
/**
* @brief find if name is in nested list
* @param name name of nested scope
*/
Scope *findInNestedList(const std::string & name);
const Scope *findRecordInNestedList(const std::string & name) const;
Scope *findRecordInNestedList(const std::string & name) {
return const_cast<Scope *>(static_cast<const Scope *>(this)->findRecordInNestedList(name));
}
const Type* findType(const std::string& name) const;
Type* findType(const std::string& name) {
return const_cast<Type*>(static_cast<const Scope *>(this)->findType(name));
}
/**
* @brief find if name is in nested list
* @param name name of nested scope
*/
Scope *findInNestedListRecursive(const std::string & name);
void addVariable(const Token *token_, const Token *start_,
const Token *end_, AccessControl access_, const Type *type_,
const Scope *scope_) {
varlist.push_back(Variable(token_, start_, end_, varlist.size(),
access_,
type_, scope_));
}
/** @brief initialize varlist */
void getVariableList();
const Function *getDestructor() const;
/**
* @brief get the number of nested scopes that are not functions
*
* This returns the number of user defined types (class, struct, union)
* that are defined in this user defined type or namespace.
*/
unsigned int getNestedNonFunctions() const;
bool hasDefaultConstructor() const;
AccessControl defaultAccess() const;
/**
* @brief check if statement is variable declaration and add it if it is
* @param tok pointer to start of statement
* @param varaccess access control of statement
* @return pointer to last token
*/
const Token *checkVariable(const Token *tok, AccessControl varaccess);
/**
* @brief get variable from name
* @param varname name of variable
* @return pointer to variable
*/
const Variable *getVariable(const std::string &varname) const;
private:
/**
* @brief helper function for getVariableList()
* @param tok pointer to token to check
* @param vartok populated with pointer to the variable token, if found
* @param typetok populated with pointer to the type token, if found
* @return true if tok points to a variable declaration, false otherwise
*/
bool isVariableDeclaration(const Token* tok, const Token*& vartok, const Token*& typetok) const;
};
class CPPCHECKLIB SymbolDatabase {
public:
SymbolDatabase(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger);
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/** @brief Information about all namespaces/classes/structrues */
std::list<Scope> scopeList;
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/** @brief Fast access to function scopes */
std::vector<const Scope *> functionScopes;
/** @brief Fast access to class and struct scopes */
std::vector<const Scope *> classAndStructScopes;
/** @brief Fast access to types */
std::list<Type> typeList;
/**
* @brief find a variable type if it's a user defined type
* @param start scope to start looking in
* @param type token containing variable type
* @return pointer to type if found or NULL if not found
*/
const Type *findVariableType(const Scope *start, const Token *type) const;
/**
* @brief find a function
* @param tok token of function call
* @return pointer to function if found or NULL if not found
*/
const Function *findFunction(const Token *tok) const;
const Scope *findScopeByName(const std::string& name) const;
const Type* findType(const Token *tok, const Scope *startScope) const;
Type* findType(const Token *tok, Scope *startScope) const {
return const_cast<Type*>(this->findType(tok, static_cast<const Scope *>(startScope)));
}
const Scope *findScope(const Token *tok, const Scope *startScope) const;
Scope *findScope(const Token *tok, Scope *startScope) const {
return const_cast<Scope *>(this->findScope(tok, static_cast<const Scope *>(startScope)));
}
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bool isClassOrStruct(const std::string &type) const {
for (std::list<Type>::const_iterator i = typeList.begin(); i != typeList.end(); ++i)
if (i->name() == type)
return true;
return false;
}
const Variable *getVariableFromVarId(std::size_t varId) const {
return _variableList[varId];
}
std::size_t getVariableListSize() const {
return _variableList.size();
}
/**
* @brief output a debug message
*/
void debugMessage(const Token *tok, const std::string &msg) const;
void printOut(const char * title = NULL) const;
void printVariable(const Variable *var, const char *indent) const;
bool isCPP() const;
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private:
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// Needed by Borland C++:
friend class Scope;
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void addClassFunction(Scope **info, const Token **tok, const Token *argStart);
Function *addGlobalFunctionDecl(Scope*& scope, const Token *argStart, const Token* funcStart);
Function *addGlobalFunction(Scope*& scope, const Token*& tok, const Token *argStart, const Token* funcStart);
void addNewFunction(Scope **info, const Token **tok);
static bool isFunction(const Token *tok, const Scope* outerScope, const Token **funcStart, const Token **argStart);
const Type *findTypeInNested(const Token *tok, const Scope *startScope) const;
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const Tokenizer *_tokenizer;
const Settings *_settings;
ErrorLogger *_errorLogger;
/** variable symbol table */
std::vector<const Variable *> _variableList;
/** list for missing types */
std::list<Type> _blankTypes;
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};
#endif