160 lines
4.8 KiB
C++
160 lines
4.8 KiB
C++
//---------------------------------------------------------------------------
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#include "CheckOther.h"
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#include "Tokenize.h"
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#include "CommonCheck.h"
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#include <sstream>
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// Warning on C-Style casts.. p = (kalle *)foo;
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//---------------------------------------------------------------------------
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void WarningOldStylePointerCast()
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{
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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// Old style pointer casting..
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if (!match(tok, "( type * ) var"))
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continue;
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// Is "type" a class?
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const char *pattern[] = {"class","",NULL};
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pattern[1] = getstr(tok, 1);
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if (!findtoken(tokens, pattern))
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continue;
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std::ostringstream ostr;
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ostr << FileLine(tok) << ": C-style pointer casting";
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ReportErr(ostr.str());
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}
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}
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//---------------------------------------------------------------------------
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// Use standard function "isdigit" instead
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//---------------------------------------------------------------------------
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void WarningIsDigit()
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{
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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bool err = false;
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err |= match(tok, "var >= '0' && var <= '9'");
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err |= match(tok, "* var >= '0' && * var <= '9'");
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err |= match(tok, "( var >= '0' ) && ( var <= '9' )");
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err |= match(tok, "( * var >= '0' ) && ( * var <= '9' )");
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if (err)
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{
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std::ostringstream ostr;
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ostr << FileLine(tok) << ": The condition can be simplified; use 'isdigit'";
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ReportErr(ostr.str());
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}
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}
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// Redundant code..
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//---------------------------------------------------------------------------
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void WarningRedundantCode()
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{
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// if (p) delete p
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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if (strcmp(tok->str,"if"))
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continue;
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const char *varname1 = NULL;
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TOKEN *tok2 = NULL;
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if (match(tok,"if ( var )"))
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{
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varname1 = getstr(tok, 2);
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tok2 = gettok(tok, 4);
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}
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else if (match(tok,"if ( var != NULL )"))
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{
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varname1 = getstr(tok, 2);
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tok2 = gettok(tok, 6);
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}
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if (varname1==NULL || tok2==NULL)
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continue;
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bool err = false;
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if (match(tok2,"delete var ;"))
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err = (strcmp(getstr(tok2,1),varname1)==0);
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else if (match(tok2,"{ delete var ; }"))
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err = (strcmp(getstr(tok2,2),varname1)==0);
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else if (match(tok2,"delete [ ] var ;"))
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err = (strcmp(getstr(tok2,1),varname1)==0);
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else if (match(tok2,"{ delete [ ] var ; }"))
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err = (strcmp(getstr(tok2,2),varname1)==0);
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else if (match(tok2,"free ( var )"))
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err = (strcmp(getstr(tok2,2),varname1)==0);
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else if (match(tok2,"{ free ( var ) ; }"))
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err = (strcmp(getstr(tok2,3),varname1)==0);
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if (err)
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{
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std::ostringstream ostr;
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ostr << FileLine(tok) << ": Redundant condition. It is safe to deallocate a NULL pointer";
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ReportErr(ostr.str());
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}
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}
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// TODO
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// if (haystack.find(needle) != haystack.end())
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// haystack.remove(needle);
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// if (condition);
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//---------------------------------------------------------------------------
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void WarningIf()
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{
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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if (strcmp(tok->str,"if")==0)
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{
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int parlevel = 0;
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for (TOKEN *tok2 = tok->next; tok2; tok2 = tok2->next)
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{
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if (tok2->str[0]=='(')
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parlevel++;
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else if (tok2->str[0]==')')
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{
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parlevel--;
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if (parlevel<=0)
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{
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if (strcmp(getstr(tok2,1), ";") == 0)
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{
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std::ostringstream ostr;
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ostr << FileLine(tok) << ": Found \"if (condition);\"";
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ReportErr(ostr.str());
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}
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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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}
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}
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//---------------------------------------------------------------------------
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