617 lines
16 KiB
C++
617 lines
16 KiB
C++
/*
|
|
* Cppcheck - A tool for static C/C++ code analysis
|
|
* Copyright (C) 2007-2010 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 tokenizeH
|
|
#define tokenizeH
|
|
//---------------------------------------------------------------------------
|
|
|
|
#include <string>
|
|
#include <map>
|
|
#include <vector>
|
|
|
|
class Token;
|
|
class ErrorLogger;
|
|
class Settings;
|
|
class SymbolDatabase;
|
|
|
|
/// @addtogroup Core
|
|
/// @{
|
|
|
|
/** @brief The main purpose is to tokenize the source code. It also has functions that simplify the token list */
|
|
class Tokenizer
|
|
{
|
|
private:
|
|
/** Deallocate lists */
|
|
void deallocateTokens();
|
|
|
|
public:
|
|
Tokenizer();
|
|
Tokenizer(const Settings * settings, ErrorLogger *errorLogger);
|
|
virtual ~Tokenizer();
|
|
|
|
/** Is the code JAVA/C#. Used for bailouts */
|
|
bool isJavaOrCSharp() const
|
|
{
|
|
if (_files.size() != 1)
|
|
return false;
|
|
const std::string::size_type pos = _files[0].rfind(".");
|
|
if (pos != std::string::npos)
|
|
return (_files[0].substr(pos) == ".java" ||
|
|
_files[0].substr(pos) == ".cs");
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Tokenize code
|
|
* @param code input stream for code, e.g.
|
|
* \code
|
|
* #file "p.h"
|
|
* class Foo
|
|
* {
|
|
* private:
|
|
* void Bar();
|
|
* };
|
|
*
|
|
* #endfile
|
|
* void Foo::Bar()
|
|
* {
|
|
* }
|
|
* \endcode
|
|
*
|
|
* @param FileName The filename
|
|
* @param configuration E.g. "A" for code where "#ifdef A" is true
|
|
* @param preprocessorCondition Set this flag to true if the code is a preprocessor condition. It disables some simplifications
|
|
* @return false if source code contains syntax errors
|
|
*/
|
|
bool tokenize(std::istream &code,
|
|
const char FileName[],
|
|
const std::string &configuration = "",
|
|
const bool preprocessorCondition = false);
|
|
|
|
/**
|
|
* Create tokens from code.
|
|
* The code must be preprocessed first:
|
|
* - multiline strings are not handled.
|
|
* - UTF in the code are not handled.
|
|
* - comments are not handled.
|
|
* @param code input stream for code
|
|
*/
|
|
void createTokens(std::istream &code);
|
|
|
|
/** Set variable id */
|
|
void setVarId();
|
|
|
|
/**
|
|
* Simplify tokenlist
|
|
*
|
|
* @return false if there is an error that requires aborting
|
|
* the checking of this file.
|
|
*/
|
|
bool simplifyTokenList();
|
|
|
|
/**
|
|
* Delete all tokens in given token list
|
|
* @param tok token list to delete
|
|
*/
|
|
static void deleteTokens(Token *tok);
|
|
|
|
/**
|
|
* Get parameter name of function
|
|
* @param ftok The token for the function name in a function
|
|
* implementation/declaration
|
|
* @param par parameter number (1,2,3,..)
|
|
* @return if the parameter was found then the parameter name is
|
|
* returned. Otherwise NULL is returned.
|
|
*/
|
|
static const char *getParameterName(const Token *ftok, unsigned int par);
|
|
|
|
/**
|
|
* Get file:line for a given token
|
|
* @param tok given token
|
|
* @return location for given token
|
|
*/
|
|
std::string fileLine(const Token *tok) const;
|
|
|
|
/**
|
|
* Calculates sizeof value for given type.
|
|
* @param type Token which will contain e.g. "int", "*", or string.
|
|
* @return sizeof for given type, or 0 if it can't be calculated.
|
|
*/
|
|
unsigned int sizeOfType(const Token *type) const;
|
|
|
|
/**
|
|
* Get filenames (the sourcefile + the files it include).
|
|
* The first filename is the filename for the sourcefile
|
|
* @return vector with filenames
|
|
*/
|
|
const std::vector<std::string> *getFiles() const;
|
|
|
|
/** recreate symbol database */
|
|
void fillFunctionList();
|
|
|
|
/**
|
|
* Get function token by function name
|
|
* @todo better handling of overloaded functions
|
|
* @todo only scan parent scopes
|
|
* @param funcname function name
|
|
*/
|
|
const Token *getFunctionTokenByName(const char funcname[]) const;
|
|
|
|
/** get tokens */
|
|
const Token *tokens() const;
|
|
|
|
/**
|
|
* get filename for given token
|
|
* @param tok The given token
|
|
* @return filename for the given token
|
|
*/
|
|
std::string file(const Token *tok) const;
|
|
|
|
/**
|
|
* get error messages that the tokenizer generate
|
|
*/
|
|
virtual void getErrorMessages(ErrorLogger *errorLogger, const Settings *settings);
|
|
|
|
/** Simplify assignment in function call "f(x=g());" => "x=g();f(x);"
|
|
*/
|
|
void simplifyAssignmentInFunctionCall();
|
|
|
|
/**
|
|
* Simplify constant calculations such as "1+2" => "3"
|
|
* @return true if modifications to token-list are done.
|
|
* false if no modifications are done.
|
|
*/
|
|
bool simplifyCalculations();
|
|
|
|
/** Insert array size where it isn't given */
|
|
void arraySize();
|
|
|
|
/** Simplify labels */
|
|
void labels();
|
|
|
|
/** Remove redundant assignment */
|
|
void removeRedundantAssignment();
|
|
|
|
/**
|
|
* Replace sizeof() to appropriate size.
|
|
*/
|
|
void simplifySizeof();
|
|
|
|
/**
|
|
* Simplify variable declarations (split up)
|
|
*/
|
|
void simplifyVarDecl();
|
|
|
|
/**
|
|
* Simplify variable initialization
|
|
* ; int *p(0);
|
|
* =>
|
|
* ; int *p = 0;
|
|
*/
|
|
void simplifyInitVar();
|
|
Token * initVar(Token * tok);
|
|
|
|
/**
|
|
* Collapse compound standard types into a single token.
|
|
* unsigned long long int => long _isUnsigned=true,_isLong=true
|
|
*/
|
|
void simplifyStdType();
|
|
|
|
/**
|
|
* Simplify question mark - colon operator
|
|
* Example: 0 ? (2/0) : 0 => 0
|
|
* @return true if something is modified
|
|
* false if nothing is done.
|
|
*/
|
|
bool simplifyQuestionMark();
|
|
|
|
/**
|
|
* Simplify compound assignments
|
|
* Example: ";a+=b;" => ";a=a+b;"
|
|
*/
|
|
void simplifyCompoundAssignment();
|
|
|
|
/**
|
|
* simplify if-assignments
|
|
* Example: "if(a=b);" => "a=b;if(a);"
|
|
*/
|
|
void simplifyIfAssign();
|
|
|
|
/**
|
|
* Simplify multiple assignments.
|
|
* Example: "a = b = c = 0;" => "a = 0; b = 0; c = 0;"
|
|
*/
|
|
void simplifyVariableMultipleAssign();
|
|
|
|
/**
|
|
* simplify if-not
|
|
* Example: "if(0==x);" => "if(!x);"
|
|
*/
|
|
void simplifyIfNot();
|
|
|
|
/**
|
|
* simplify if-not NULL
|
|
* - "if(0!=x);" => "if(x);"
|
|
*/
|
|
void simplifyIfNotNull();
|
|
|
|
/** @brief simplify if (a) { if (a) */
|
|
void simplifyIfSameInnerCondition();
|
|
|
|
/**
|
|
* Simplify the "not" and "and" keywords to "!" and "&&"
|
|
* accordingly.
|
|
* Examples:
|
|
* - "if (not p)" => "if (!p)"
|
|
* - "if (p and q)" => "if (p && q)"
|
|
*/
|
|
bool simplifyLogicalOperators();
|
|
|
|
/**
|
|
* Simplify comma into a semicolon when possible:
|
|
* - "delete a, delete b" => "delete a; delete b;"
|
|
* - "a = 0, b = 0;" => "a = 0; b = 0;"
|
|
* - "return a(), b;" => "a(); return b;"
|
|
*/
|
|
void simplifyComma();
|
|
|
|
/** Add braces to an if-block
|
|
*/
|
|
void simplifyIfAddBraces();
|
|
|
|
/**
|
|
* Add braces to an do-while block
|
|
*/
|
|
void simplifyDoWhileAddBraces();
|
|
|
|
/**
|
|
* typedef A mytype;
|
|
* mytype c;
|
|
*
|
|
* Becomes:
|
|
* typedef A mytype;
|
|
* A c;
|
|
*/
|
|
void simplifyTypedef();
|
|
|
|
/**
|
|
* Simplify casts
|
|
*/
|
|
void simplifyCasts();
|
|
|
|
/**
|
|
* A simplify function that replaces a variable with its value in cases
|
|
* when the value is known. e.g. "x=10; if(x)" => "x=10;if(10)"
|
|
*
|
|
* @return true if modifications to token-list are done.
|
|
* false if no modifications are done.
|
|
*/
|
|
bool simplifyKnownVariables();
|
|
|
|
/** Replace a "goto" with the statements */
|
|
void simplifyGoto();
|
|
|
|
/** Expand nested strcat() calls. */
|
|
void simplifyNestedStrcat();
|
|
|
|
/** Simplify "if else" */
|
|
void elseif();
|
|
|
|
void addtoken(const char str[], const unsigned int lineno, const unsigned int fileno, bool split = false);
|
|
void addtoken(const Token *tok, const unsigned int lineno, const unsigned int fileno);
|
|
|
|
/**
|
|
* Simplify the operator "?:"
|
|
*/
|
|
void simplifyConditionOperator();
|
|
|
|
/** Simplify conditions
|
|
* @return true if something is modified
|
|
* false if nothing is done.
|
|
*/
|
|
bool simplifyConditions();
|
|
|
|
/** Remove redundant code, e.g. if( false ) { int a; } should be
|
|
* removed, because it is never executed.
|
|
* @return true if something is modified
|
|
* false if nothing is done.
|
|
*/
|
|
bool removeReduntantConditions();
|
|
|
|
/**
|
|
* Reduces "; ;" to ";", except in "( ; ; )"
|
|
*/
|
|
void removeRedundantSemicolons();
|
|
|
|
/** Simplify function calls - constant return value
|
|
* @return true if something is modified
|
|
* false if nothing is done.
|
|
*/
|
|
bool simplifyFunctionReturn();
|
|
|
|
/** Struct initialization */
|
|
void simplifyStructInit();
|
|
|
|
/** Struct simplification
|
|
* "struct S { } s;" => "struct S { }; S s;"
|
|
*/
|
|
|
|
void simplifyStructDecl();
|
|
|
|
/**
|
|
* Remove redundant parenthesis:
|
|
* - "((x))" => "(x)"
|
|
* - "(function())" => "function()"
|
|
* - "(delete x)" => "delete x"
|
|
* - "(delete [] x)" => "delete [] x"
|
|
* @return true if modifications to token-list are done.
|
|
* false if no modifications are done.
|
|
*/
|
|
bool simplifyRedundantParanthesis();
|
|
|
|
/** Simplify references */
|
|
void simplifyReference();
|
|
|
|
/**
|
|
* Simplify functions like "void f(x) int x; {"
|
|
* into "void f(int x) {"
|
|
*/
|
|
void simplifyFunctionParameters();
|
|
|
|
/**
|
|
* Simplify templates
|
|
*/
|
|
void simplifyTemplates();
|
|
|
|
/**
|
|
* Used after simplifyTemplates to perform a little cleanup.
|
|
* Sometimes the simplifyTemplates isn't fully successful and then
|
|
* there are function calls etc with "wrong" syntax.
|
|
*/
|
|
void simplifyTemplates2();
|
|
|
|
/**
|
|
* Simplify e.g. 'atol("0")' into '0'
|
|
*/
|
|
void simplifyMathFunctions();
|
|
|
|
/**
|
|
* Modify strings in the token list by replacing hex and oct
|
|
* values. E.g. "\x61" -> "a" and "\000" -> "\0"
|
|
* @param source The string to be modified, e.g. "\x61"
|
|
* @return Modified string, e.g. "a"
|
|
*/
|
|
std::string simplifyString(const std::string &source);
|
|
|
|
/**
|
|
* Use "<" comparison instead of ">"
|
|
* Use "<=" comparison instead of ">="
|
|
*/
|
|
void simplifyComparisonOrder();
|
|
|
|
/**
|
|
* Change "int const x;" into "const int x;"
|
|
*/
|
|
void simplifyConst();
|
|
|
|
/**
|
|
* simplify "while (0)"
|
|
*/
|
|
void simplifyWhile0();
|
|
|
|
/**
|
|
* Simplify while(func() && errno==EINTR)
|
|
*/
|
|
void simplifyErrNoInWhile();
|
|
|
|
/**
|
|
* Simplify while(func(f))
|
|
*/
|
|
void simplifyFuncInWhile();
|
|
|
|
/**
|
|
* Replace enum with constant value
|
|
*/
|
|
void simplifyEnum();
|
|
|
|
/**
|
|
* Remove "std::" before some function names
|
|
*/
|
|
void simplifyStd();
|
|
|
|
/** Simplify function pointers */
|
|
void simplifyFunctionPointers();
|
|
|
|
/**
|
|
* Remove exception specifications. This function calls itself recursively.
|
|
* @param tok First token in scope to cleanup
|
|
*/
|
|
void removeExceptionSpecifications(Token *tok) const;
|
|
|
|
void insertTokens(Token *dest, const Token *src, unsigned int n);
|
|
|
|
/**
|
|
* Send error message to error logger about internal bug.
|
|
* @param tok the token that this bug concerns.
|
|
*/
|
|
void cppcheckError(const Token *tok) const;
|
|
|
|
/**
|
|
* Setup links for tokens so that one can call Token::link().
|
|
*
|
|
* @return false if there was a mismatch with tokens, this
|
|
* should mean that source code was not valid.
|
|
*/
|
|
bool createLinks();
|
|
|
|
/** Syntax error */
|
|
void syntaxError(const Token *tok);
|
|
|
|
/** Syntax error. Example: invalid number of ')' */
|
|
void syntaxError(const Token *tok, char c);
|
|
|
|
/**
|
|
* assert that tokens are ok - used during debugging for example
|
|
* to catch problems in simplifyTokenList.
|
|
* @return always true.
|
|
*/
|
|
bool validate() const;
|
|
|
|
/**
|
|
* Helper function for simplifyDoWhileAddBraces()
|
|
* @param tok This must be a "do" token, which is
|
|
* not followed by "{".
|
|
*/
|
|
bool simplifyDoWhileAddBracesHelper(Token *tok);
|
|
|
|
/**
|
|
* Remove __declspec()
|
|
*/
|
|
void simplifyDeclspec();
|
|
|
|
/**
|
|
* Remove calling convention
|
|
*/
|
|
void simplifyCallingConvention();
|
|
|
|
/**
|
|
* Remove __attribute__ ((?))
|
|
*/
|
|
void simplifyAttribute();
|
|
|
|
/**
|
|
* Remove keywords "volatile", "inline", "register", and "restrict"
|
|
*/
|
|
void simplifyKeyword();
|
|
|
|
/**
|
|
* Remove __asm
|
|
*/
|
|
void simplifyAsm();
|
|
|
|
/**
|
|
* Simplify bitfields - the field width is removed as we don't use it.
|
|
*/
|
|
void simplifyBitfields();
|
|
|
|
/**
|
|
* Remove __builtin_expect(...), likely(...), and unlikely(...)
|
|
*/
|
|
void simplifyBuiltinExpect();
|
|
|
|
/**
|
|
* Remove Microsoft MFC 'DECLARE_MESSAGE_MAP()'
|
|
*/
|
|
void simplifyMicrosoftMFC();
|
|
|
|
/**
|
|
* Remove Borland code
|
|
*/
|
|
void simplifyBorland();
|
|
|
|
/**
|
|
* Remove Qt signals and slots
|
|
*/
|
|
void simplifyQtSignalsSlots();
|
|
|
|
/**
|
|
* This will return a short name describing function parameters
|
|
* e.g. parameters: (int a, char b) should get name "int,char,".
|
|
* This should help to identify functions with the same name,
|
|
* but with different parameters.
|
|
* @param start The "(" token
|
|
* @return, e.g. "int,char,"
|
|
*/
|
|
static std::string getNameForFunctionParams(const Token *start);
|
|
|
|
/**
|
|
* check for duplicate enum definition
|
|
*/
|
|
bool duplicateDefinition(Token **tokPtr, const Token *name);
|
|
|
|
/**
|
|
* duplicate enum definition error
|
|
*/
|
|
void duplicateEnumError(const Token *tok1, const Token *tok2, const std::string & type);
|
|
|
|
bool duplicateTypedef(Token **tokPtr, const Token *name);
|
|
void duplicateTypedefError(const Token *tok1, const Token *tok2, const std::string & type);
|
|
|
|
/**
|
|
* Report error - duplicate declarations
|
|
*/
|
|
void duplicateDeclarationError(const Token *tok1, const Token *tok2, const std::string &type);
|
|
|
|
void unsupportedTypedef(const Token *tok) const;
|
|
|
|
/** Was there templates in the code? */
|
|
bool codeWithTemplates() const
|
|
{
|
|
return _codeWithTemplates;
|
|
}
|
|
|
|
void setSettings(const Settings *settings)
|
|
{
|
|
_settings = settings;
|
|
}
|
|
|
|
SymbolDatabase * getSymbolDatabase() const;
|
|
|
|
private:
|
|
/** Disable copy constructor, no implementation */
|
|
Tokenizer(const Tokenizer &);
|
|
|
|
/** Disable assignment operator, no implementation */
|
|
Tokenizer &operator=(const Tokenizer &);
|
|
|
|
/** Token list */
|
|
Token *_tokens, *_tokensBack;
|
|
|
|
/** sizeof information for known types */
|
|
std::map<std::string, unsigned int> _typeSize;
|
|
|
|
/** filenames for the tokenized source code (source + included) */
|
|
std::vector<std::string> _files;
|
|
|
|
/** settings */
|
|
const Settings * _settings;
|
|
|
|
/** errorlogger */
|
|
ErrorLogger * const _errorLogger;
|
|
|
|
/** E.g. "A" for code where "#ifdef A" is true. This is used to
|
|
print additional information in error situations. */
|
|
std::string _configuration;
|
|
|
|
/**
|
|
* was there any templates? templates that are "unused" are
|
|
* removed from the token list
|
|
*/
|
|
bool _codeWithTemplates;
|
|
|
|
/** Symbol database that all checks etc can use */
|
|
mutable SymbolDatabase *_symbolDatabase;
|
|
};
|
|
|
|
/// @}
|
|
|
|
//---------------------------------------------------------------------------
|
|
#endif
|