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cppcheck/CommonCheck.cpp

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/*
* c++check - c/c++ syntax checking
* Copyright (C) 2007 Daniel Marjamäki
*
* 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 "CommonCheck.h"
#include "tokenize.h"
#include <stdlib.h> // free
#include <iostream>
#include <sstream>
#include <list>
#include <algorithm>
#include <cstring>
#ifdef __BORLANDC__
#include <ctype.h>
#endif
//---------------------------------------------------------------------------
extern bool CheckCodingStyle;
bool OnlyReportUniqueErrors;
std::ostringstream errout;
static std::list<const TOKEN *> FunctionList;
class GlobalFunction
{
private:
unsigned int _FileId;
std::string _FuncName;
public:
GlobalFunction( const unsigned int FileId, const char FuncName[] )
{
_FileId = FileId;
_FuncName = FuncName;
}
unsigned int file_id() const { return _FileId; }
const std::string &name() const { return _FuncName; }
};
static std::list< GlobalFunction > GlobalFunctions;
static std::list< GlobalFunction > UsedGlobalFunctions;
//---------------------------------------------------------------------------
std::string FileLine(const TOKEN *tok)
{
std::ostringstream ostr;
ostr << "[" << Files[tok->FileIndex] << ":" << tok->linenr << "]";
return ostr.str();
}
//---------------------------------------------------------------------------
bool SameFileName( const char fname1[], const char fname2[] )
{
#ifdef __linux__
return bool( strcmp(fname1, fname2) == 0 );
#endif
#ifdef __GNUC__
return bool( strcasecmp(fname1, fname2) == 0 );
#endif
#ifdef __BORLANDC__
return bool( stricmp(fname1, fname2) == 0 );
#endif
#ifdef _MSC_VER
return bool( _stricmp(fname1, fname2) == 0 );
#endif
}
//---------------------------------------------------------------------------
std::list<std::string> ErrorList;
void ReportErr(const std::string &errmsg)
{
if ( OnlyReportUniqueErrors )
{
if ( std::find( ErrorList.begin(), ErrorList.end(), errmsg ) != ErrorList.end() )
return;
ErrorList.push_back( errmsg );
}
errout << errmsg << std::endl;
}
//---------------------------------------------------------------------------
bool IsName(const char str[])
{
return bool(str[0]=='_' || isalpha(str[0]));
}
//---------------------------------------------------------------------------
bool IsNumber(const char str[])
{
return bool(isdigit(str[0]) != 0);
}
//---------------------------------------------------------------------------
bool IsStandardType(const char str[])
{
if (!str)
return false;
bool Ret = false;
const char *type[] = {"bool","char","short","int","long","float","double",0};
for (int i = 0; type[i]; i++)
Ret |= (strcmp(str,type[i])==0);
return Ret;
}
//---------------------------------------------------------------------------
void FillFunctionList(const unsigned int file_id)
{
FunctionList.clear();
std::list<const char *> _usedfunc;
if ( file_id == 0 )
{
GlobalFunctions.clear();
}
bool staticfunc = false;
bool classfunc = false;
int indentlevel = 0;
for ( const TOKEN *tok = tokens; tok; tok = tok->next )
{
if ( tok->str[0] == '{' )
indentlevel++;
else if ( tok->str[0] == '}' )
indentlevel--;
if (indentlevel > 0)
{
if ( CheckCodingStyle )
{
const char *funcname = 0;
if ( Match(tok,"%var% (") )
funcname = tok->str;
else if ( Match(tok, "= %var% ;") ||
Match(tok, "= %var% ,") )
funcname = tok->next->str;
if ( std::find(_usedfunc.begin(), _usedfunc.end(), funcname) == _usedfunc.end() )
_usedfunc.push_back( funcname );
}
continue;
}
if (strchr("};", tok->str[0]))
staticfunc = classfunc = false;
else if ( strcmp( tok->str, "static" ) == 0 )
staticfunc = true;
else if ( strcmp( tok->str, "::" ) == 0 )
classfunc = true;
else if (Match(tok, "%var% ("))
{
// Check if this is the first token of a function implementation..
for ( const TOKEN *tok2 = tok; tok2; tok2 = tok2->next )
{
if ( tok2->str[0] == ';' )
{
tok = tok2;
break;
}
else if ( tok2->str[0] == '{' )
{
break;
}
else if ( tok2->str[0] == ')' )
{
if ( Match(tok2, ") {") )
{
if (CheckCodingStyle && !staticfunc && !classfunc && tok->FileIndex==0)
GlobalFunctions.push_back( GlobalFunction(file_id, tok->str) );
FunctionList.push_back( tok );
tok = tok2;
}
else
{
tok = tok2;
while (tok->next && !strchr(";{", tok->next->str[0]))
tok = tok->next;
}
break;
}
}
}
}
for (std::list<const char *>::const_iterator it = _usedfunc.begin(); it != _usedfunc.end(); ++it)
{
if ( *it != 0 )
{
UsedGlobalFunctions.push_back( GlobalFunction(file_id, *it) );
}
}
}
//---------------------------------------------------------------------------
const TOKEN *GetFunctionTokenByName( const char funcname[] )
{
std::list<const TOKEN *>::const_iterator it;
for ( it = FunctionList.begin(); it != FunctionList.end(); it++ )
{
if ( strcmp( (*it)->str, funcname ) == 0 )
{
return *it;
}
}
return NULL;
}
//--------------------------------------------------------------------------
const char *GetParameterName( const TOKEN *ftok, int par )
{
int _par = 1;
for ( ; ftok; ftok = ftok->next)
{
if ( Match(ftok, ",") )
++_par;
if ( par==_par && Match(ftok, "%var% [,)]") )
return ftok->str;
}
return NULL;
}
//--------------------------------------------------------------------------
void CheckGlobalFunctionUsage(const std::vector<std::string> &filenames)
{
// Iterator for GlobalFunctions
std::list<GlobalFunction>::const_iterator func;
// Iterator for UsedGlobalFunctions
std::list<GlobalFunction>::const_iterator usedfunc;
unsigned int i1 = 0;
unsigned int i2 = 1;
// Check that every function in GlobalFunctions are used
for ( func = GlobalFunctions.begin(); func != GlobalFunctions.end(); func++ )
{
if ( GlobalFunctions.size() > 100 )
{
++i1;
if ( i1 > (i2 * GlobalFunctions.size()) / 100 )
{
if ( (i2 % 10) == 0 )
std::cout << i2 << "%";
else
std::cout << ".";
std::cout.flush();
++i2;
}
}
const std::string &funcname = func->name();
if ( funcname == "main" || funcname == "WinMain" )
continue;
// Check if this global function is used in any of the other files..
bool UsedOtherFile = false;
bool UsedAnyFile = false;
for ( usedfunc = UsedGlobalFunctions.begin(); usedfunc != UsedGlobalFunctions.end(); usedfunc++ )
{
if ( funcname == usedfunc->name() )
{
UsedAnyFile = true;
if (func->file_id() != usedfunc->file_id())
{
UsedOtherFile = true;
break;
}
}
}
if ( ! UsedAnyFile )
{
std::ostringstream errmsg;
errmsg << "[" << filenames[func->file_id()] << "]: "
<< "The function '" << func->name() << "' is never used.";
ReportErr( errmsg.str() );
}
else if ( ! UsedOtherFile )
{
std::ostringstream errmsg;
errmsg << "[" << filenames[func->file_id()] << "]: "
<< "The linkage of the function '" << func->name() << "' can be local (static) instead of global";
ReportErr( errmsg.str() );
}
}
std::cout << "\n";
}
//---------------------------------------------------------------------------
bool Match(const TOKEN *tok, const char pattern[], const char *varname1[], const char *varname2[])
{
if (!tok)
return false;
const char *p = pattern;
while (*p)
{
// Skip spaces in pattern..
while ( *p == ' ' )
p++;
// Extract token from pattern..
char str[50];
char *s = str;
while (*p && *p!=' ')
{
*s = *p;
s++;
p++;
}
*s = 0;
// No token => Success!
if (str[0] == 0)
return true;
// Any symbolname..
if (strcmp(str,"%var%")==0 || strcmp(str,"%type%")==0)
{
if (!IsName(tok->str))
return false;
}
// Variable name..
else if (strcmp(str,"%var1%")==0 || strcmp(str,"%var2%")==0)
{
const char **varname = (strcmp(str,"%var1%")==0) ? varname1 : varname2;
if ( ! varname )
return false;
if (strcmp(tok->str, varname[0]) != 0)
return false;
for ( int i = 1; varname[i]; i++ )
{
if ( ! Tokenizer::gettok(tok, 2) )
return false;
if ( strcmp(Tokenizer::getstr(tok, 1), ".") )
return false;
if ( strcmp(Tokenizer::getstr(tok, 2), varname[i]) )
return false;
tok = Tokenizer::gettok(tok, 2);
}
}
else if (strcmp(str,"%num%")==0)
{
if ( ! IsNumber(tok->str) )
return false;
}
else if (strcmp(str,"%str%")==0)
{
if ( tok->str[0] != '\"' )
return false;
}
// [.. => search for a one-character token..
else if (str[0]=='[' && strchr(str, ']') && tok->str[1] == 0)
{
*strrchr(str, ']') = 0;
if ( strchr( str + 1, tok->str[0] ) == 0 )
return false;
}
else if (strcmp(str, tok->str) != 0)
return false;
tok = tok->next;
if (!tok)
return false;
}
// The end of the pattern has been reached and nothing wrong has been found
return true;
}
//---------------------------------------------------------------------------
const TOKEN *findmatch(const TOKEN *tok, const char pattern[], const char *varname1[], const char *varname2[])
{
for ( ; tok; tok = tok->next)
{
if ( Match(tok, pattern, varname1, varname2) )
return tok;
}
return 0;
}
//---------------------------------------------------------------------------
void deleteTokens(TOKEN *tok)
{
while (tok)
{
TOKEN *next = tok->next;
delete tok;
tok = next;
}
}
//---------------------------------------------------------------------------
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