670 lines
22 KiB
C++
670 lines
22 KiB
C++
/*
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* c++check - c/c++ syntax checking
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* Copyright (C) 2007 Daniel Marjamäki
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/
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*/
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//---------------------------------------------------------------------------
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#include "CheckClass.h"
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#include <locale>
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#include <string>
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#include <sstream>
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#include <cstring>
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#include <algorithm>
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#ifdef __BORLANDC__
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#include <ctype.h>
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#include <mem.h>
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#endif
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//---------------------------------------------------------------------------
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CheckClass::CheckClass( const Tokenizer *tokenizer, const Settings &settings, ErrorLogger *errorLogger )
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{
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_tokenizer = tokenizer;
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_settings = settings;
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_errorLogger = errorLogger;
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}
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CheckClass::~CheckClass()
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{
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}
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//---------------------------------------------------------------------------
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struct CheckClass::VAR *CheckClass::ClassChecking_GetVarList(const TOKEN *tok1)
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{
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// Get variable list..
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struct VAR *varlist = NULL;
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unsigned int indentlevel = 0;
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for (const TOKEN *tok = tok1; tok; tok = tok->next)
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{
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if (!tok->next)
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break;
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if (tok->aaaa0() == '{')
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indentlevel++;
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if (tok->aaaa0() == '}')
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{
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if (indentlevel <= 1)
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break;
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indentlevel--;
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}
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if (indentlevel==1 && (strchr(";{}", tok->aaaa0()) || (tok->aaaa0()!=':' && strchr(tok->aaaa(), ':'))))
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{
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const TOKEN *next = tok->next;
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const char *varname = 0;
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// Is it a variable declaration?
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if ( TOKEN::Match(next,"%type% %var% ;") )
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{
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const char *types[] = {"bool", "char", "int", "short", "long", "float", "double", 0};
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for ( int type = 0; types[type]; type++ )
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{
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if ( strcmp(next->aaaa(), types[type]) == 0)
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{
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varname = next->next->aaaa();
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break;
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}
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}
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}
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// Pointer?
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else if ( TOKEN::Match(next, "%type% * %var% ;") )
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{
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varname = next->strAt(2);
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}
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if (varname)
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{
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struct VAR *var = new VAR;
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memset(var, 0, sizeof(struct VAR));
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var->name = varname;
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var->init = false;
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var->next = varlist;
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varlist = var;
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}
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}
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}
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return varlist;
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}
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//---------------------------------------------------------------------------
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const TOKEN * CheckClass::FindClassFunction( const TOKEN *tok, const char classname[], const char funcname[], int &indentlevel )
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{
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const char *_classname[2] = {0,0};
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const char *_funcname[2] = {0,0};
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_classname[0] = classname;
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_funcname[0] = funcname;
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if ( indentlevel < 0 || tok == NULL )
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return NULL;
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for ( ;tok; tok = tok->next )
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{
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if ( indentlevel == 0 &&
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( TOKEN::Match(tok, "class %var1% {", _classname) ||
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TOKEN::Match(tok, "class %var1% : %type% {", _classname) ) )
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{
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if ( TOKEN::Match(tok, "class %var% {") )
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tok = tok->tokAt(3);
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else
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tok = tok->tokAt(5);
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indentlevel = 1;
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}
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if ( tok->aaaa0() == '{' )
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{
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// If indentlevel==0 don't go to indentlevel 1. Skip the block.
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if ( indentlevel > 0 )
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++indentlevel;
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else
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{
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for ( ; tok; tok = tok->next )
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{
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if ( tok->aaaa0() == '{' )
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++indentlevel;
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else if ( tok->aaaa0() == '}' )
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{
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--indentlevel;
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if ( indentlevel <= 0 )
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break;
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}
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}
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if ( tok == NULL )
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return NULL;
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continue;
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}
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}
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if ( tok->aaaa0() == '}' )
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{
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indentlevel--;
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if ( indentlevel < 0 )
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return NULL;
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}
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if ( indentlevel == 1 )
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{
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// Member function implemented in the class declaration?
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if ( TOKEN::Match( tok, "%var1% (", _funcname ) )
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{
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const TOKEN *tok2 = tok;
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while ( tok2 && tok2->aaaa0() != '{' && tok2->aaaa0() != ';' )
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tok2 = tok2->next;
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if ( tok2 && tok2->aaaa0() == '{' )
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return tok;
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}
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}
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else if ( indentlevel == 0 && TOKEN::Match(tok, "%var1% :: %var2% (", _classname, _funcname) )
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{
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return tok;
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}
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}
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// Not found
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return NULL;
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}
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//---------------------------------------------------------------------------
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void CheckClass::InitVar(struct VAR *varlist, const char varname[])
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{
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for (struct VAR *var = varlist; var; var = var->next)
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{
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if ( strcmp(var->name, varname) == 0 )
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{
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var->init = true;
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break;
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}
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}
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}
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//---------------------------------------------------------------------------
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void CheckClass::ClassChecking_VarList_Initialize(const TOKEN *tok1, const TOKEN *ftok, struct VAR *varlist, const char classname[], std::list<std::string> &callstack)
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{
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bool Assign = false;
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unsigned int indentlevel = 0;
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for (; ftok; ftok = ftok->next)
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{
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if (!ftok->next)
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break;
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// Class constructor.. initializing variables like this
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// clKalle::clKalle() : var(value) { }
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if (indentlevel==0)
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{
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if (Assign && TOKEN::Match(ftok, "%var% ("))
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{
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InitVar( varlist, ftok->aaaa() );
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}
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Assign |= (ftok->aaaa0() == ':');
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}
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if (ftok->aaaa0() == '{')
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{
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indentlevel++;
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Assign = false;
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}
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if (ftok->aaaa0() == '}')
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{
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if (indentlevel <= 1)
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break;
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indentlevel--;
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}
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if ( indentlevel < 1 )
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continue;
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// Before a new statement there is "[{};)=]" or "else"
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if ( ! TOKEN::Match(ftok, "[{};)=]") && ! TOKEN::Match(ftok, "else") )
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continue;
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// Using the operator= function to initialize all variables..
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if ( TOKEN::Match(ftok->next, "* this = ") )
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{
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for (struct VAR *var = varlist; var; var = var->next)
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var->init = true;
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break;
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}
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if (!TOKEN::Match(ftok->next, "%var%") && !TOKEN::Match(ftok->next, "this . %var%"))
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continue;
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// Goto the first token in this statement..
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ftok = ftok->next;
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// Skip "this->"
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if ( TOKEN::Match(ftok, "this .") )
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ftok = ftok->tokAt(2);
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// Clearing all variables..
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if (TOKEN::Match(ftok,"memset ( this ,"))
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{
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for (struct VAR *var = varlist; var; var = var->next)
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var->init = true;
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break;
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}
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// Calling member function?
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else if (TOKEN::Match(ftok, "%var% ("))
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{
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// No recursive calls!
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if ( std::find(callstack.begin(),callstack.end(),ftok->aaaa()) == callstack.end() )
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{
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callstack.push_back( ftok->aaaa() );
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int i = 0;
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const TOKEN *ftok2 = FindClassFunction( tok1, classname, ftok->aaaa(), i );
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ClassChecking_VarList_Initialize(tok1, ftok2, varlist, classname, callstack);
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}
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}
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// Assignment of member variable?
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else if (TOKEN::Match(ftok, "%var% ="))
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{
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InitVar( varlist, ftok->aaaa() );
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}
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// The functions 'clear' and 'Clear' are supposed to initialize variable.
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if (TOKEN::Match(ftok,"%var% . clear (") || TOKEN::Match(ftok,"%var% . Clear ("))
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{
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InitVar( varlist, ftok->aaaa() );
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}
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}
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}
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//---------------------------------------------------------------------------
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// ClassCheck: Check that all class constructors are ok.
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//---------------------------------------------------------------------------
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void CheckClass::CheckConstructors()
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{
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// Locate class
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const char *pattern_classname[] = {"class","","{",NULL};
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const TOKEN *tok1 = TOKEN::findtoken(_tokenizer->tokens(), pattern_classname);
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while (tok1)
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{
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const char *classname = tok1->next->aaaa();
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if ( !(tok1->next->isName()) )
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{
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tok1 = TOKEN::findtoken( tok1->next, pattern_classname );
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continue;
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}
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// Are there a class constructor?
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const char *constructor_pattern[] = {"","clKalle","(",NULL};
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constructor_pattern[1] = classname;
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const TOKEN *constructor_token = TOKEN::findtoken( _tokenizer->tokens(), constructor_pattern );
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while ( constructor_token && constructor_token->aaaa0() == '~' )
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constructor_token = TOKEN::findtoken( constructor_token->next, constructor_pattern );
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if ( ! constructor_token )
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{
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// There's no class constructor
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if ( _settings._checkCodingStyle )
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{
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// Check that all member variables are initialized..
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struct VAR *varlist = ClassChecking_GetVarList(tok1);
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if ( varlist )
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{
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std::ostringstream ostr;
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ostr << _tokenizer->fileLine(tok1);
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ostr << " The class '" << classname << "' has no constructor";
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_errorLogger->reportErr(ostr.str());
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}
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// Delete the varlist..
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while (varlist)
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{
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struct VAR *nextvar = varlist->next;
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delete varlist;
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varlist = nextvar;
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}
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}
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tok1 = TOKEN::findtoken( tok1->next, pattern_classname );
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continue;
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}
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// Check that all member variables are initialized..
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struct VAR *varlist = ClassChecking_GetVarList(tok1);
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int indentlevel = 0;
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constructor_token = FindClassFunction( tok1, classname, classname, indentlevel );
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std::list<std::string> callstack;
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ClassChecking_VarList_Initialize(tok1, constructor_token, varlist, classname, callstack);
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while ( constructor_token )
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{
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// Check if any variables are uninitialized
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for (struct VAR *var = varlist; var; var = var->next)
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{
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// Is it a static member variable?
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const char *pattern[] = {"","::","","=",NULL};
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pattern[0] = classname;
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pattern[2] = var->name;
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if (TOKEN::findtoken(_tokenizer->tokens(), pattern))
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continue;
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if (!var->init)
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{
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std::ostringstream ostr;
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ostr << _tokenizer->fileLine(constructor_token);
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ostr << " Uninitialized member variable '" << classname << "::" << var->name << "'";
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_errorLogger->reportErr(ostr.str());
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}
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}
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for ( struct VAR *var = varlist; var; var = var->next )
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var->init = false;
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constructor_token = FindClassFunction( constructor_token->next, classname, classname, indentlevel );
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callstack.clear();
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ClassChecking_VarList_Initialize(tok1, constructor_token, varlist, classname, callstack);
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}
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// Delete the varlist..
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while (varlist)
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{
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struct VAR *nextvar = varlist->next;
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delete varlist;
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varlist = nextvar;
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}
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tok1 = TOKEN::findtoken( tok1->next, pattern_classname );
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}
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}
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//---------------------------------------------------------------------------
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// ClassCheck: Unused private functions
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//---------------------------------------------------------------------------
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void CheckClass::CheckUnusedPrivateFunctions()
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{
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// Locate some class
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const char *pattern_class[] = {"class","","{",NULL};
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for (const TOKEN *tok1 = TOKEN::findtoken(_tokenizer->tokens(), pattern_class); tok1; tok1 = TOKEN::findtoken(tok1->next, pattern_class))
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{
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const char *classname = tok1->next->aaaa();
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// The class implementation must be available..
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const char *pattern_classconstructor[] = {"","::","",NULL};
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pattern_classconstructor[0] = classname;
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pattern_classconstructor[2] = classname;
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if (!TOKEN::findtoken(_tokenizer->tokens(),pattern_classconstructor))
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continue;
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// Get private functions..
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std::list<std::string> FuncList;
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FuncList.clear();
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bool priv = false;
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unsigned int indent_level = 0;
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for (const TOKEN *tok = tok1; tok; tok = tok->next)
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{
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if (TOKEN::Match(tok,"friend %var%"))
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{
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// Todo: Handle friend classes
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FuncList.clear();
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break;
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}
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if (tok->aaaa0() == '{')
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indent_level++;
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if (tok->aaaa0() == '}')
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{
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if (indent_level <= 1)
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break;
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indent_level--;
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}
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if (strcmp(tok->aaaa(),"};") == 0)
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break;
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if (strcmp(tok->aaaa(),"private:") == 0)
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priv = true;
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else if (strcmp(tok->aaaa(),"public:") == 0)
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priv = false;
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else if (strcmp(tok->aaaa(),"protected:") == 0)
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priv = false;
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else if (priv && indent_level == 1)
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{
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if ( TOKEN::Match(tok, "typedef %type% (") )
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tok = tok->tokAt(2);
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if (TOKEN::Match(tok, "%var% (") &&
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!TOKEN::Match(tok,classname))
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{
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FuncList.push_back(tok->aaaa());
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}
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}
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}
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// Check that all private functions are used..
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const char *pattern_function[] = {"","::",NULL};
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pattern_function[0] = classname;
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bool HasFuncImpl = false;
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const TOKEN *ftok = _tokenizer->tokens();
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while (ftok)
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{
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ftok = TOKEN::findtoken(ftok,pattern_function);
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int numpar = 0;
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while (ftok && ftok->aaaa0()!=';' && ftok->aaaa0()!='{')
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{
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if (ftok->aaaa0() == '(')
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numpar++;
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else if (ftok->aaaa0() == ')')
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numpar--;
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ftok = ftok->next;
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}
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if (!ftok)
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break;
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if (ftok->aaaa0() != ';' && numpar == 0)
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{
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HasFuncImpl = true;
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indent_level = 0;
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while (ftok)
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{
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if (ftok->aaaa0() == '{')
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indent_level++;
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if (ftok->aaaa0() == '}')
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{
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if (indent_level<=1)
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break;
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indent_level--;
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}
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if (ftok->next && ftok->next->aaaa0() == '(')
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FuncList.remove(ftok->aaaa());
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ftok = ftok->next;
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}
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}
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if (ftok)
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ftok = ftok->next;
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}
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while (HasFuncImpl && !FuncList.empty())
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{
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bool fp = false;
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// Final check; check if the function pointer is used somewhere..
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const char *_pattern[] = {"=","",NULL};
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_pattern[1] = FuncList.front().c_str();
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fp |= (TOKEN::findtoken(_tokenizer->tokens(), _pattern) != NULL);
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_pattern[0] = "return";
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fp |= (TOKEN::findtoken(_tokenizer->tokens(), _pattern) != NULL);
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_pattern[0] = "(";
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fp |= (TOKEN::findtoken(_tokenizer->tokens(), _pattern) != NULL);
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_pattern[0] = ")";
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fp |= (TOKEN::findtoken(_tokenizer->tokens(), _pattern) != NULL);
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_pattern[0] = ",";
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fp |= (TOKEN::findtoken(_tokenizer->tokens(), _pattern) != NULL);
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if (!fp)
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{
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std::ostringstream ostr;
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ostr << "Class '" << classname << "', unused private function: '" << FuncList.front() << "'";
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_errorLogger->reportErr(ostr.str());
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}
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FuncList.pop_front();
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}
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}
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}
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//---------------------------------------------------------------------------
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// ClassCheck: Check that memset is not used on classes
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//---------------------------------------------------------------------------
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void CheckClass::CheckMemset()
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{
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// Locate all 'memset' tokens..
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for (const TOKEN *tok = _tokenizer->tokens(); tok; tok = tok->next)
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{
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if (!TOKEN::Match(tok,"memset") && !TOKEN::Match(tok,"memcpy") && !TOKEN::Match(tok,"memmove"))
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continue;
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// Todo: Handle memcpy and memmove
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const char *type = NULL;
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if (TOKEN::Match(tok, "memset ( %var% , %num% , sizeof ( %type% ) )"))
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type = tok->strAt(8);
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else if (TOKEN::Match(tok, "memset ( & %var% , %num% , sizeof ( %type% ) )"))
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type = tok->strAt(9);
|
|
else if (TOKEN::Match(tok, "memset ( %var% , %num% , sizeof ( struct %type% ) )"))
|
|
type = tok->strAt(9);
|
|
else if (TOKEN::Match(tok, "memset ( & %var% , %num% , sizeof ( struct %type% ) )"))
|
|
type = tok->strAt(10);
|
|
else if (TOKEN::Match(tok, "%type% ( %var% , %var% , sizeof ( %type% ) )"))
|
|
type = tok->strAt(8);
|
|
|
|
// No type defined => The tokens didn't match
|
|
if (!(type && type[0]))
|
|
continue;
|
|
|
|
// Warn if type is a class..
|
|
const char *pattern1[] = {"class","",NULL};
|
|
pattern1[1] = type;
|
|
if (TOKEN::findtoken(_tokenizer->tokens(),pattern1))
|
|
{
|
|
std::ostringstream ostr;
|
|
ostr << _tokenizer->fileLine(tok) << ": Using '" << tok->aaaa() << "' on class.";
|
|
_errorLogger->reportErr(ostr.str());
|
|
continue;
|
|
}
|
|
|
|
// Warn if type is a struct that contains any std::*
|
|
const char *pattern2[] = {"struct","","{",NULL};
|
|
pattern2[1] = type;
|
|
for (const TOKEN *tstruct = TOKEN::findtoken(_tokenizer->tokens(), pattern2); tstruct; tstruct = tstruct->next)
|
|
{
|
|
if (tstruct->aaaa0() == '}')
|
|
break;
|
|
|
|
if (TOKEN::Match(tstruct, "std :: %type% %var% ;"))
|
|
{
|
|
std::ostringstream ostr;
|
|
ostr << _tokenizer->fileLine(tok) << ": Using '" << tok->aaaa() << "' on struct that contains a 'std::" << tstruct->strAt(2) << "'";
|
|
_errorLogger->reportErr(ostr.str());
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// ClassCheck: "void operator=("
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CheckClass::CheckOperatorEq1()
|
|
{
|
|
const char *pattern[] = {"void", "operator", "=", "(", NULL};
|
|
if (const TOKEN *tok = TOKEN::findtoken(_tokenizer->tokens(),pattern))
|
|
{
|
|
std::ostringstream ostr;
|
|
ostr << _tokenizer->fileLine(tok) << ": 'operator=' should return something";
|
|
_errorLogger->reportErr(ostr.str());
|
|
}
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// A destructor in a base class should be virtual
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CheckClass::virtualDestructor()
|
|
{
|
|
const TOKEN *derived = TOKEN::findmatch(_tokenizer->tokens(), "class %var% : public %var%");
|
|
while (derived)
|
|
{
|
|
// Name of base class..
|
|
const char *baseName[2];
|
|
baseName[0] = derived->strAt( 4 );
|
|
baseName[1] = 0;
|
|
|
|
// Find the destructor for the base class.
|
|
const TOKEN *base = TOKEN::findmatch(_tokenizer->tokens(), "%any% ~ %var1% (", baseName);
|
|
while (base && TOKEN::Match(base, "::"))
|
|
base = TOKEN::findmatch(base->next, "%any% ~ %var1% (", baseName);
|
|
|
|
// Check that there is a destructor..
|
|
if ( ! base )
|
|
{
|
|
// Is the class declaration available?
|
|
base = TOKEN::findmatch(_tokenizer->tokens(), "class %var1% :|{", baseName);
|
|
if ( base )
|
|
{
|
|
std::ostringstream errmsg;
|
|
errmsg << _tokenizer->fileLine(base) << ": Base class " << baseName[0] << " doesn't have a virtual destructor";
|
|
_errorLogger->reportErr(errmsg.str());
|
|
}
|
|
}
|
|
|
|
// There is a destructor. Check that it's virtual..
|
|
else if ( ! TOKEN::Match(base, "virtual") )
|
|
{
|
|
std::ostringstream errmsg;
|
|
errmsg << _tokenizer->fileLine(base) << ": The destructor for the base class " << baseName[0] << " is not virtual";
|
|
_errorLogger->reportErr(errmsg.str());
|
|
}
|
|
|
|
derived = TOKEN::findmatch(derived->next, "class %var% : public %var%");
|
|
}
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|