1205 lines
45 KiB
C++
1205 lines
45 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2012 Daniel Marjamäki and Cppcheck team.
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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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#include "templatesimplifier.h"
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#include "mathlib.h"
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#include "token.h"
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#include "tokenlist.h"
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#include "errorlogger.h"
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#include "settings.h"
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#include <algorithm>
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#include <sstream>
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#include <list>
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#include <set>
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#include <stack>
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#include <vector>
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#include <string>
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#include <cassert>
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//---------------------------------------------------------------------------
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void TemplateSimplifier::cleanupAfterSimplify(Token *tokens)
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{
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bool goback = false;
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for (Token *tok = tokens; tok; tok = tok->next()) {
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if (goback) {
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tok = tok->previous();
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goback = false;
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}
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if (tok->str() == "(")
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tok = tok->link();
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else if (Token::Match(tok, "%type% <") &&
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(!tok->previous() || tok->previous()->str() == ";")) {
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const Token *tok2 = tok->tokAt(2);
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std::string type;
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while (Token::Match(tok2, "%type% ,") || Token::Match(tok2, "%num% ,")) {
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type += tok2->str() + ",";
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tok2 = tok2->tokAt(2);
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}
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if (Token::Match(tok2, "%type% > (") || Token::Match(tok2, "%num% > (")) {
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type += tok2->str();
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tok->str(tok->str() + "<" + type + ">");
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Token::eraseTokens(tok, tok2->tokAt(2));
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if (tok == tokens)
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goback = true;
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}
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}
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}
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}
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const Token* TemplateSimplifier::hasComplicatedSyntaxErrorsInTemplates(Token *tokens)
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{
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// check for more complicated syntax errors when using templates..
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for (const Token *tok = tokens; tok; tok = tok->next()) {
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// skip executing scopes..
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if (Token::simpleMatch(tok, ") {") || Token::Match(tok, ") %var% {") || Token::Match(tok, "[,=] {")) {
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while (tok->str() != "{")
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tok = tok->next();
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tok = tok->link();
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}
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// skip executing scopes (ticket #1984)..
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else if (Token::simpleMatch(tok, "; {"))
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tok = tok->next()->link();
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// skip executing scopes (ticket #3183)..
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else if (Token::simpleMatch(tok, "( {"))
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tok = tok->next()->link();
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// skip executing scopes (ticket #1985)..
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else if (Token::simpleMatch(tok, "try {")) {
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tok = tok->next()->link();
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while (Token::simpleMatch(tok, "} catch (")) {
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tok = tok->linkAt(2);
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if (Token::simpleMatch(tok, ") {"))
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tok = tok->next()->link();
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}
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}
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// not start of statement?
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if (tok->previous() && !Token::Match(tok, "[;{}]"))
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continue;
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// skip starting tokens.. ;;; typedef typename foo::bar::..
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while (Token::Match(tok, "[;{}]"))
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tok = tok->next();
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while (Token::Match(tok, "typedef|typename"))
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tok = tok->next();
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while (Token::Match(tok, "%type% ::"))
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tok = tok->tokAt(2);
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if (!tok)
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break;
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// template variable or type..
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if (Token::Match(tok, "%type% <")) {
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// these are used types..
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std::set<std::string> usedtypes;
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// parse this statement and see if the '<' and '>' are matching
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unsigned int level = 0;
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for (const Token *tok2 = tok; tok2 && !Token::Match(tok2, "[;{}]"); tok2 = tok2->next()) {
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if (tok2->str() == "(")
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tok2 = tok2->link();
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else if (tok2->str() == "<") {
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bool inclevel = false;
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if (Token::simpleMatch(tok2->previous(), "operator <"))
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;
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else if (level == 0)
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inclevel = true;
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else if (tok2->next() && tok2->next()->isStandardType())
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inclevel = true;
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else if (Token::simpleMatch(tok2, "< typename"))
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inclevel = true;
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else if (Token::Match(tok2->tokAt(-2), "<|, %type% <") && usedtypes.find(tok2->previous()->str()) != usedtypes.end())
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inclevel = true;
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else if (Token::Match(tok2, "< %type%") && usedtypes.find(tok2->next()->str()) != usedtypes.end())
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inclevel = true;
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else if (Token::Match(tok2, "< %type%")) {
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// is the next token a type and not a variable/constant?
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// assume it's a type if there comes another "<"
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const Token *tok3 = tok2->next();
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while (Token::Match(tok3, "%type% ::"))
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tok3 = tok3->tokAt(2);
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if (Token::Match(tok3, "%type% <"))
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inclevel = true;
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}
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if (inclevel) {
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++level;
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if (Token::Match(tok2->tokAt(-2), "<|, %type% <"))
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usedtypes.insert(tok2->previous()->str());
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}
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} else if (tok2->str() == ">") {
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if (level > 0)
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--level;
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} else if (tok2->str() == ">>") {
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if (level > 0)
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--level;
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if (level > 0)
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--level;
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}
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}
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if (level > 0) {
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// syntaxError(tok);
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return tok;
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}
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}
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}
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return 0;
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}
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unsigned int TemplateSimplifier::templateParameters(const Token *tok)
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{
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unsigned int numberOfParameters = 1;
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if (!tok)
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return 0;
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if (tok->str() != "<")
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return 0;
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tok = tok->next();
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unsigned int level = 0;
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while (tok) {
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// skip const
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if (tok->str() == "const")
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tok = tok->next();
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// skip struct/union
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if (Token::Match(tok, "struct|union"))
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tok = tok->next();
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// Skip '&'
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if (Token::Match(tok, "& %var% [,>]"))
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tok = tok->next();
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// skip std::
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if (tok && tok->str() == "::")
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tok = tok->next();
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while (Token::Match(tok, "%var% ::"))
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tok = tok->tokAt(2);
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if (!tok)
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return 0;
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// num/type ..
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if (!tok->isNumber() && tok->type() != Token::eChar && !tok->isName())
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return 0;
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tok = tok->next();
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if (!tok)
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return 0;
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// * / const
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while (Token::Match(tok, "*|&|const"))
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tok = tok->next();
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if (!tok)
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return 0;
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// Function pointer or prototype..
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while (tok->str() == "(")
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tok = tok->link()->next();
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// inner template
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if (tok->str() == "<") {
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++level;
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tok = tok->next();
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}
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if (!tok)
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return 0;
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// ,/>
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while (tok->str() == ">" || tok->str() == ">>") {
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if (level == 0)
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return numberOfParameters;
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--level;
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if (tok->str() == ">>") {
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if (level == 0)
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return numberOfParameters;
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--level;
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}
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tok = tok->next();
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if (!tok)
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return 0;
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}
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if (tok->str() != ",")
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continue;
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if (level == 0)
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++numberOfParameters;
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tok = tok->next();
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}
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return 0;
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}
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bool TemplateSimplifier::removeTemplate(Token *tok)
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{
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if (!Token::simpleMatch(tok, "template <"))
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return false;
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int indentlevel = 0;
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unsigned int countgt = 0; // Counter for ">"
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for (const Token *tok2 = tok->next(); tok2; tok2 = tok2->next()) {
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if (tok2->str() == "(") {
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tok2 = tok2->link();
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} else if (tok2->str() == ")") { // garbage code! (#3504)
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Token::eraseTokens(tok,tok2);
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tok->deleteThis();
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return false;
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}
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else if (tok2->str() == "{") {
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tok2 = tok2->link()->next();
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Token::eraseTokens(tok, tok2);
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if (tok2 && tok2->str() == ";" && tok2->next())
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tok->deleteNext();
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tok->deleteThis();
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return true;
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} else if (tok2->str() == "}") { // garbage code! (#3449)
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Token::eraseTokens(tok,tok2);
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tok->deleteThis();
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return false;
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}
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// Count ">"
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if (tok2->str() == ">")
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countgt++;
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// don't remove constructor
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if (tok2->str() == "explicit" ||
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(countgt == 1 && Token::Match(tok2->previous(), "> %type% (") && Token::simpleMatch(tok2->next()->link(), ") {"))) {
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Token::eraseTokens(tok, tok2);
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tok->deleteThis();
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return true;
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}
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if (tok2->str() == ";") {
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tok2 = tok2->next();
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Token::eraseTokens(tok, tok2);
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tok->deleteThis();
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return true;
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}
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if (tok2->str() == "<")
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++indentlevel;
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else if (indentlevel >= 2 && tok2->str() == ">")
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--indentlevel;
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else if (Token::Match(tok2, "> class|struct %var% [,)]")) {
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tok2 = tok2->next();
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Token::eraseTokens(tok, tok2);
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tok->deleteThis();
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return true;
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}
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}
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return false;
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}
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std::set<std::string> TemplateSimplifier::expandSpecialized(Token *tokens)
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{
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std::set<std::string> expandedtemplates;
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// Locate specialized templates..
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for (Token *tok = tokens; tok; tok = tok->next()) {
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if (!Token::simpleMatch(tok, "template < >"))
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continue;
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// what kind of template is this?
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Token *tok2 = tok->tokAt(3);
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while (tok2 && (tok2->isName() || tok2->str() == "*"))
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tok2 = tok2->next();
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if (!TemplateSimplifier::templateParameters(tok2))
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continue;
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// unknown template.. bail out
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if (!tok2->previous()->isName())
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continue;
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tok2 = tok2->previous();
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std::string s;
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{
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std::ostringstream ostr;
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const Token *tok3 = tok2;
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for (; tok3 && tok3->str() != ">"; tok3 = tok3->next()) {
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if (tok3 != tok2)
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ostr << " ";
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ostr << tok3->str();
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}
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if (!Token::simpleMatch(tok3, "> ("))
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continue;
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s = ostr.str();
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}
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// save search pattern..
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const std::string pattern(s + " > (");
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// remove spaces to create new name
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s.erase(std::remove(s.begin(), s.end(), ' '), s.end());
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const std::string name(s + ">");
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expandedtemplates.insert(name);
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// Rename template..
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Token::eraseTokens(tok2, Token::findsimplematch(tok2, "("));
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tok2->str(name);
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// delete the "template < >"
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tok->deleteNext(2);
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tok->deleteThis();
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// Use this special template in the code..
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while (NULL != (tok2 = const_cast<Token *>(Token::findmatch(tok2, pattern.c_str())))) {
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Token::eraseTokens(tok2, Token::findsimplematch(tok2, "("));
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tok2->str(name);
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}
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}
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return expandedtemplates;
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}
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std::list<Token *> TemplateSimplifier::getTemplateDeclarations(Token *tokens, bool &codeWithTemplates)
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{
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std::list<Token *> templates;
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for (Token *tok = tokens; tok; tok = tok->next()) {
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// TODO: handle namespaces. Right now we don't instantiate templates that are defined in namespaces.
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if (Token::Match(tok, "namespace %type% {"))
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tok = tok->linkAt(2);
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if (Token::simpleMatch(tok, "template <")) {
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codeWithTemplates = true;
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for (const Token *tok2 = tok; tok2; tok2 = tok2->next()) {
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// Just a declaration => ignore this
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if (tok2->str() == ";")
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break;
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// Implementation => add to "templates"
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if (tok2->str() == "{") {
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templates.push_back(tok);
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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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return templates;
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}
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std::list<Token *> TemplateSimplifier::getTemplateInstantiations(Token *tokens)
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{
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std::list<Token *> used;
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for (Token *tok = tokens; tok; tok = tok->next()) {
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// template definition.. skip it
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if (Token::simpleMatch(tok, "template <")) {
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tok->next()->findClosingBracket(tok);
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if (!tok)
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break;
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} else if (Token::Match(tok->previous(), "[({};=] %var% <") ||
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Token::Match(tok->tokAt(-2), "[,:] private|protected|public %var% <")) {
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// Add inner template instantiations first => go to the ">"
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// and then parse backwards, adding all seen instantiations
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const Token *tok2;
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tok->next()->findClosingBracket(tok2);
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// parse backwards and add template instantiations
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for (; tok2 && tok2 != tok; tok2 = tok2->previous()) {
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if (Token::Match(tok2, ", %var% <") &&
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TemplateSimplifier::templateParameters(tok2->tokAt(2))) {
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used.push_back(tok2->next());
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}
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}
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// Add outer template..
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if (TemplateSimplifier::templateParameters(tok->next()))
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used.push_back(tok);
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}
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}
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return used;
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}
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void TemplateSimplifier::useDefaultArgumentValues(const std::list<Token *> &templates,
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const std::list<Token *> &templateInstantiations)
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{
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for (std::list<Token *>::const_iterator iter1 = templates.begin(); iter1 != templates.end(); ++iter1) {
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// template parameters with default value has syntax such as:
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// x = y
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// this list will contain all the '=' tokens for such arguments
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std::list<Token *> eq;
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// parameter number. 1,2,3,..
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std::size_t templatepar = 1;
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// the template classname. This will be empty for template functions
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std::string classname;
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// Scan template declaration..
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for (Token *tok = *iter1; tok; tok = tok->next()) {
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// end of template parameters?
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if (tok->str() == ">") {
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if (Token::Match(tok, "> class|struct %var%"))
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classname = tok->strAt(2);
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break;
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}
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// next template parameter
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if (tok->str() == ",")
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++templatepar;
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// default parameter value
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else if (tok->str() == "=")
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eq.push_back(tok);
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}
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if (eq.empty() || classname.empty())
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continue;
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// iterate through all template instantiations
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for (std::list<Token *>::const_iterator iter2 = templateInstantiations.begin(); iter2 != templateInstantiations.end(); ++iter2) {
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Token *tok = *iter2;
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if (!Token::Match(tok, (classname + " < %any%").c_str()))
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continue;
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// count the parameters..
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unsigned int usedpar = 1;
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for (tok = tok->tokAt(3); tok; tok = tok->tokAt(2)) {
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if (tok->str() == ">")
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break;
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if (tok->str() == ",")
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++usedpar;
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else
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break;
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}
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if (tok && tok->str() == ">") {
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tok = tok->previous();
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std::list<Token *>::const_iterator it = eq.begin();
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for (std::size_t i = (templatepar - eq.size()); it != eq.end() && i < usedpar; ++i)
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++it;
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while (it != eq.end()) {
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tok->insertToken(",");
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tok = tok->next();
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const Token *from = (*it)->next();
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std::stack<Token *> links;
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while (from && (!links.empty() || (from->str() != "," && from->str() != ">"))) {
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tok->insertToken(from->str());
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tok = tok->next();
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if (Token::Match(tok, "(|["))
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links.push(tok);
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else if (!links.empty() && Token::Match(tok, ")|]")) {
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Token::createMutualLinks(links.top(), tok);
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links.pop();
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}
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from = from->next();
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}
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++it;
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}
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}
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}
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for (std::list<Token *>::iterator it = eq.begin(); it != eq.end(); ++it) {
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Token * const eqtok = *it;
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const Token *tok2;
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for (tok2 = eqtok->next(); tok2; tok2 = tok2->next()) {
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if (tok2->str() == "(")
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tok2 = tok2->link();
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else if (tok2->str() == "," || tok2->str() == ">")
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break;
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}
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Token::eraseTokens(eqtok, tok2);
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eqtok->deleteThis();
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}
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}
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}
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|
bool TemplateSimplifier::instantiateMatch(const Token *instance, const std::string &name, std::size_t numberOfArguments, const char patternAfter[])
|
|
{
|
|
if (!Token::simpleMatch(instance, (name + " <").c_str()))
|
|
return false;
|
|
|
|
if (numberOfArguments != TemplateSimplifier::templateParameters(instance->next()))
|
|
return false;
|
|
|
|
if (patternAfter) {
|
|
const Token *tok = Token::findsimplematch(instance, ">");
|
|
if (!tok || !Token::Match(tok->next(), patternAfter))
|
|
return false;
|
|
}
|
|
|
|
// nothing mismatching was found..
|
|
return true;
|
|
}
|
|
|
|
int TemplateSimplifier::getTemplateNamePosition(const Token *tok)
|
|
{
|
|
// get the position of the template name
|
|
int namepos = 0;
|
|
if (Token::Match(tok, "> class|struct %type% {|:"))
|
|
namepos = 2;
|
|
else if (Token::Match(tok, "> %type% *|&| %type% ("))
|
|
namepos = 2;
|
|
else if (Token::Match(tok, "> %type% %type% *|&| %type% ("))
|
|
namepos = 3;
|
|
else {
|
|
// Name not found
|
|
return -1;
|
|
}
|
|
if ((tok->strAt(namepos) == "*" || tok->strAt(namepos) == "&"))
|
|
++namepos;
|
|
|
|
return namepos;
|
|
}
|
|
|
|
|
|
void TemplateSimplifier::expandTemplate(
|
|
TokenList& tokenlist,
|
|
const Token *tok,
|
|
const std::string &name,
|
|
std::vector<const Token *> &typeParametersInDeclaration,
|
|
const std::string &newName,
|
|
std::vector<const Token *> &typesUsedInTemplateInstantion,
|
|
std::list<Token *> &templateInstantiations)
|
|
{
|
|
for (const Token *tok3 = tokenlist.front(); tok3; tok3 = tok3->next()) {
|
|
if (tok3->str() == "{" || tok3->str() == "(")
|
|
tok3 = tok3->link();
|
|
|
|
// Start of template..
|
|
if (tok3 == tok) {
|
|
tok3 = tok3->next();
|
|
}
|
|
|
|
// member function implemented outside class definition
|
|
else if (TemplateSimplifier::instantiateMatch(tok3, name, typeParametersInDeclaration.size(), ":: ~| %var% (")) {
|
|
tokenlist.addtoken(newName.c_str(), tok3->linenr(), tok3->fileIndex());
|
|
while (tok3->str() != "::")
|
|
tok3 = tok3->next();
|
|
}
|
|
|
|
// not part of template.. go on to next token
|
|
else
|
|
continue;
|
|
|
|
int indentlevel = 0;
|
|
std::stack<Token *> brackets; // holds "(", "[" and "{" tokens
|
|
|
|
for (; tok3; tok3 = tok3->next()) {
|
|
if (tok3->isName()) {
|
|
// search for this token in the type vector
|
|
unsigned int itype = 0;
|
|
while (itype < typeParametersInDeclaration.size() && typeParametersInDeclaration[itype]->str() != tok3->str())
|
|
++itype;
|
|
|
|
// replace type with given type..
|
|
if (itype < typeParametersInDeclaration.size()) {
|
|
for (const Token *typetok = typesUsedInTemplateInstantion[itype];
|
|
typetok && !Token::Match(typetok, "[,>]");
|
|
typetok = typetok->next()) {
|
|
tokenlist.addtoken(typetok, tok3->linenr(), tok3->fileIndex());
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// replace name..
|
|
if (Token::Match(tok3, (name + " !!<").c_str())) {
|
|
tokenlist.addtoken(newName.c_str(), tok3->linenr(), tok3->fileIndex());
|
|
continue;
|
|
}
|
|
|
|
// copy
|
|
tokenlist.addtoken(tok3, tok3->linenr(), tok3->fileIndex());
|
|
if (Token::Match(tok3, "%type% <")) {
|
|
//if (!Token::simpleMatch(tok3, (name + " <").c_str()))
|
|
//done = false;
|
|
templateInstantiations.push_back(tokenlist.back());
|
|
}
|
|
|
|
// link() newly tokens manually
|
|
else if (tok3->str() == "{") {
|
|
brackets.push(tokenlist.back());
|
|
indentlevel++;
|
|
} else if (tok3->str() == "(") {
|
|
brackets.push(tokenlist.back());
|
|
} else if (tok3->str() == "[") {
|
|
brackets.push(tokenlist.back());
|
|
} else if (tok3->str() == "}") {
|
|
assert(brackets.empty() == false && brackets.top()->str() == "{");
|
|
Token::createMutualLinks(brackets.top(), tokenlist.back());
|
|
brackets.pop();
|
|
if (indentlevel <= 1 && brackets.empty()) {
|
|
// there is a bug if indentlevel is 0
|
|
// the "}" token should only be added if indentlevel is 1 but I add it always intentionally
|
|
// if indentlevel ever becomes 0, cppcheck will write:
|
|
// ### Error: Invalid number of character {
|
|
break;
|
|
}
|
|
--indentlevel;
|
|
} else if (tok3->str() == ")") {
|
|
assert(brackets.empty() == false && brackets.top()->str() == "(");
|
|
Token::createMutualLinks(brackets.top(), tokenlist.back());
|
|
brackets.pop();
|
|
} else if (tok3->str() == "]") {
|
|
assert(brackets.empty() == false && brackets.top()->str() == "[");
|
|
Token::createMutualLinks(brackets.top(), tokenlist.back());
|
|
brackets.pop();
|
|
}
|
|
}
|
|
|
|
assert(brackets.empty());
|
|
}
|
|
}
|
|
|
|
static bool isLowerThanOr(const Token* lower)
|
|
{
|
|
return lower->isAssignmentOp() || Token::Match(lower, "}|;|(|[|]|)|,|?|:|%oror%|&&|return|throw|case");
|
|
}
|
|
static bool isLowerThanXor(const Token* lower)
|
|
{
|
|
return isLowerThanOr(lower) || lower->str() == "|";
|
|
}
|
|
static bool isLowerThanAnd(const Token* lower)
|
|
{
|
|
return isLowerThanXor(lower) || lower->str() == "^";
|
|
}
|
|
static bool isLowerThanShift(const Token* lower)
|
|
{
|
|
return isLowerThanAnd(lower) || Token::Match(lower, "&|<|<=|>|>=|==|!=");
|
|
}
|
|
static bool isLowerThanPlusMinus(const Token* lower)
|
|
{
|
|
return isLowerThanShift(lower) || lower->str() == "<<" || lower->str() == ">>";
|
|
}
|
|
static bool isLowerThanMulDiv(const Token* lower)
|
|
{
|
|
return isLowerThanPlusMinus(lower) || lower->str() == "+" || lower->str() == "-";
|
|
}
|
|
static bool isLowerEqualThanMulDiv(const Token* lower)
|
|
{
|
|
return isLowerThanMulDiv(lower) || Token::Match(lower, "[*/%]");
|
|
}
|
|
|
|
|
|
bool TemplateSimplifier::simplifyNumericCalculations(Token *tok)
|
|
{
|
|
bool ret = false;
|
|
// (1-2)
|
|
while (tok->tokAt(4) && tok->next()->isNumber() && tok->tokAt(3)->isNumber()) { // %any% %num% %any% %num% %any%
|
|
const Token* op = tok->tokAt(2);
|
|
const Token* after = tok->tokAt(4);
|
|
if (Token::Match(tok, "* %num% /") && tok->next()->str() == MathLib::multiply(tok->strAt(3), MathLib::divide(tok->next()->str(), tok->strAt(3)))) {
|
|
// Division where result is a whole number
|
|
} else if (!((op->str() == "*" && (isLowerThanMulDiv(tok) || tok->str() == "*") && isLowerEqualThanMulDiv(after)) || // associative
|
|
(Token::Match(op, "[/%]") && isLowerThanMulDiv(tok) && isLowerEqualThanMulDiv(after)) || // NOT associative
|
|
(Token::Match(op, "[+-]") && isLowerThanMulDiv(tok) && isLowerThanMulDiv(after)) || // Only partially (+) associative, but handled later
|
|
(Token::Match(op, ">>|<<") && isLowerThanShift(tok) && isLowerThanPlusMinus(after)) || // NOT associative
|
|
(op->str() == "&" && isLowerThanShift(tok) && isLowerThanShift(after)) || // associative
|
|
(op->str() == "^" && isLowerThanAnd(tok) && isLowerThanAnd(after)) || // associative
|
|
(op->str() == "|" && isLowerThanXor(tok) && isLowerThanXor(after)))) // associative
|
|
break;
|
|
|
|
tok = tok->next();
|
|
|
|
// Don't simplify "%num% / 0"
|
|
if (Token::Match(op, "[/%] 0"))
|
|
continue;
|
|
|
|
// Integer operations
|
|
if (Token::Match(op, ">>|<<|&|^|%or%")) {
|
|
const char cop = op->str()[0];
|
|
const MathLib::bigint leftInt(MathLib::toLongNumber(tok->str()));
|
|
const MathLib::bigint rightInt(MathLib::toLongNumber(tok->strAt(2)));
|
|
std::string result;
|
|
|
|
if (cop == '&' || cop == '|' || cop == '^')
|
|
result = MathLib::calculate(tok->str(), tok->strAt(2), cop);
|
|
else if (cop == '<') {
|
|
if (tok->previous()->str() != "<<" && rightInt > 0) // Ensure that its not a shift operator as used for streams
|
|
result = MathLib::longToString(leftInt << rightInt);
|
|
} else if (rightInt > 0)
|
|
result = MathLib::longToString(leftInt >> rightInt);
|
|
|
|
if (!result.empty()) {
|
|
ret = true;
|
|
tok->str(result);
|
|
tok->deleteNext(2);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
else if (Token::Match(tok->previous(), "- %num% - %num%"))
|
|
tok->str(MathLib::add(tok->str(), tok->strAt(2)));
|
|
else if (Token::Match(tok->previous(), "- %num% + %num%"))
|
|
tok->str(MathLib::subtract(tok->str(), tok->strAt(2)));
|
|
else {
|
|
try {
|
|
tok->str(MathLib::calculate(tok->str(), tok->strAt(2), op->str()[0]));
|
|
} catch (InternalError &e) {
|
|
e.token = tok;
|
|
throw;
|
|
}
|
|
}
|
|
|
|
tok->deleteNext(2);
|
|
|
|
ret = true;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
// TODO: This is not the correct class for simplifyCalculations(), so it
|
|
// should be moved away.
|
|
bool TemplateSimplifier::simplifyCalculations(Token *_tokens)
|
|
{
|
|
bool ret = false;
|
|
for (Token *tok = _tokens; tok; tok = tok->next()) {
|
|
// Remove parentheses around variable..
|
|
// keep parentheses here: dynamic_cast<Fred *>(p);
|
|
// keep parentheses here: A operator * (int);
|
|
// keep parentheses here: int ( * ( * f ) ( ... ) ) (int) ;
|
|
// keep parentheses here: int ( * * ( * compilerHookVector ) (void) ) ( ) ;
|
|
// keep parentheses here: operator new [] (size_t);
|
|
// keep parentheses here: Functor()(a ... )
|
|
// keep parentheses here: ) ( var ) ;
|
|
if (Token::Match(tok->next(), "( %var% ) ;|)|,|]|%op%") &&
|
|
!tok->isName() &&
|
|
tok->str() != ">" &&
|
|
tok->str() != "]" &&
|
|
!Token::simpleMatch(tok->previous(), "operator") &&
|
|
!Token::simpleMatch(tok->previous(), "* )") &&
|
|
!Token::simpleMatch(tok->previous(), ") )") &&
|
|
!Token::Match(tok->tokAt(-2), "* %var% )") &&
|
|
!Token::Match(tok->tokAt(-2), "%type% ( ) ( %var%") &&
|
|
!Token::Match(tok, ") ( %var% ) ;")
|
|
) {
|
|
tok->deleteNext();
|
|
tok = tok->next();
|
|
tok->deleteNext();
|
|
ret = true;
|
|
}
|
|
|
|
if (tok->type() == Token::eChar &&
|
|
Token::Match(tok->previous(), "(|&&|%oror% %any% ==|!=|<=|<|>=|> %num% &&|%oror%|)")) {
|
|
tok->str(MathLib::longToString(tok->str()[1] & 0xff));
|
|
}
|
|
|
|
if (tok->isNumber()) {
|
|
// Remove redundant conditions (0&&x) (1||x)
|
|
if (Token::Match(tok->previous(), "[(=,] 0 &&") ||
|
|
Token::Match(tok->previous(), "[(=,] 1 ||")) {
|
|
unsigned int par = 0;
|
|
const Token *tok2 = tok;
|
|
for (; tok2; tok2 = tok2->next()) {
|
|
if (tok2->str() == "(")
|
|
++par;
|
|
else if (tok2->str() == ")") {
|
|
if (par == 0)
|
|
break;
|
|
--par;
|
|
} else if (par == 0 && (Token::Match(tok2, "[,;]")))
|
|
break;
|
|
}
|
|
if (Token::Match(tok2, "[);,]"))
|
|
Token::eraseTokens(tok, tok2);
|
|
continue;
|
|
}
|
|
|
|
if (tok->str() == "0") {
|
|
if (Token::Match(tok->previous(), "[+-|] 0")) {
|
|
tok = tok->previous();
|
|
if (Token::Match(tok->tokAt(-4), "[;{}] %var% = %var% [+-|] 0 ;") &&
|
|
tok->strAt(-3) == tok->previous()->str()) {
|
|
tok = tok->tokAt(-3);
|
|
tok->deleteNext(2);
|
|
tok->deleteThis();
|
|
}
|
|
tok->deleteNext();
|
|
tok->deleteThis();
|
|
ret = true;
|
|
} else if (Token::Match(tok->previous(), "[=([,] 0 [+|]") ||
|
|
Token::Match(tok->previous(), "return|case 0 [+|]")) {
|
|
tok->deleteNext();
|
|
tok->deleteThis();
|
|
ret = true;
|
|
} else if (Token::Match(tok->previous(), "[=[(,] 0 * %var% ,|]|)|;|=|%op%") ||
|
|
Token::Match(tok->previous(), "[=[(,] 0 * %num% ,|]|)|;|=|%op%") ||
|
|
Token::Match(tok->previous(), "[=[(,] 0 * ( ,|]|)|;|=|%op%") ||
|
|
Token::Match(tok->previous(), "return|case 0 *|&& %var% ,|:|;|=|%op%") ||
|
|
Token::Match(tok->previous(), "return|case 0 *|&& %num% ,|:|;|=|%op%") ||
|
|
Token::Match(tok->previous(), "return|case 0 *|&& ( ,|:|;|=|%op%")) {
|
|
tok->deleteNext();
|
|
if (tok->next()->str() == "(")
|
|
Token::eraseTokens(tok, tok->next()->link());
|
|
tok->deleteNext();
|
|
ret = true;
|
|
} else if (Token::Match(tok->previous(), "[=[(,] 0 && *|& %any% ,|]|)|;|=|%op%") ||
|
|
Token::Match(tok->previous(), "return|case 0 && *|& %any% ,|:|;|=|%op%")) {
|
|
tok->deleteNext();
|
|
tok->deleteNext();
|
|
if (tok->next()->str() == "(")
|
|
Token::eraseTokens(tok, tok->next()->link());
|
|
tok->deleteNext();
|
|
ret = true;
|
|
}
|
|
}
|
|
|
|
if (tok->str() == "1") {
|
|
if (Token::Match(tok->previous(), "[=[(,] 1 %oror% %any% ,|]|)|;|=|%op%") ||
|
|
Token::Match(tok->previous(), "return|case 1 %oror% %any% ,|:|;|=|%op%")) {
|
|
tok->deleteNext();
|
|
if (tok->next()->str() == "(")
|
|
Token::eraseTokens(tok, tok->next()->link());
|
|
tok->deleteNext();
|
|
ret = true;
|
|
} else if (Token::Match(tok->previous(), "[=[(,] 1 %oror% *|& %any% ,|]|)|;|=|%op%") ||
|
|
Token::Match(tok->previous(), "return|case 1 %oror% *|& %any% ,|:|;|=|%op%")) {
|
|
tok->deleteNext();
|
|
tok->deleteNext();
|
|
if (tok->next()->str() == "(")
|
|
Token::eraseTokens(tok, tok->next()->link());
|
|
tok->deleteNext();
|
|
ret = true;
|
|
}
|
|
}
|
|
|
|
if (Token::simpleMatch(tok->previous(), "* 1") || Token::simpleMatch(tok, "1 *")) {
|
|
if (tok->previous() && tok->previous()->isOp())
|
|
tok = tok->previous();
|
|
tok->deleteNext();
|
|
tok->deleteThis();
|
|
ret = true;
|
|
}
|
|
|
|
// Remove parentheses around number..
|
|
if (Token::Match(tok->tokAt(-2), "%any% ( %num% )") && !tok->tokAt(-2)->isName() && tok->strAt(-2) != ">") {
|
|
tok = tok->previous();
|
|
tok->deleteThis();
|
|
tok->deleteNext();
|
|
ret = true;
|
|
}
|
|
|
|
if (Token::simpleMatch(tok->previous(), "( 0 ||") ||
|
|
Token::simpleMatch(tok->previous(), "|| 0 )") ||
|
|
Token::simpleMatch(tok->previous(), "( 0 |") ||
|
|
Token::simpleMatch(tok->previous(), "| 0 )") ||
|
|
Token::simpleMatch(tok->previous(), "( 1 &&") ||
|
|
Token::simpleMatch(tok->previous(), "&& 1 )")) {
|
|
if (tok->previous()->isOp())
|
|
tok = tok->previous();
|
|
tok->deleteNext();
|
|
tok->deleteThis();
|
|
ret = true;
|
|
}
|
|
|
|
if (Token::Match(tok, "%num% ==|!=|<=|>=|<|> %num%") &&
|
|
MathLib::isInt(tok->str()) &&
|
|
MathLib::isInt(tok->strAt(2))) {
|
|
if (Token::Match(tok->previous(), "(|&&|%oror%") && Token::Match(tok->tokAt(3), ")|&&|%oror%")) {
|
|
const MathLib::bigint op1(MathLib::toLongNumber(tok->str()));
|
|
const std::string &cmp(tok->next()->str());
|
|
const MathLib::bigint op2(MathLib::toLongNumber(tok->strAt(2)));
|
|
|
|
std::string result;
|
|
|
|
if (cmp == "==")
|
|
result = (op1 == op2) ? "1" : "0";
|
|
else if (cmp == "!=")
|
|
result = (op1 != op2) ? "1" : "0";
|
|
else if (cmp == "<=")
|
|
result = (op1 <= op2) ? "1" : "0";
|
|
else if (cmp == ">=")
|
|
result = (op1 >= op2) ? "1" : "0";
|
|
else if (cmp == "<")
|
|
result = (op1 < op2) ? "1" : "0";
|
|
else if (cmp == ">")
|
|
result = (op1 > op2) ? "1" : "0";
|
|
|
|
tok->str(result);
|
|
tok->deleteNext(2);
|
|
ret = true;
|
|
}
|
|
}
|
|
}
|
|
// Division where result is a whole number
|
|
else if (Token::Match(tok->previous(), "* %num% /") &&
|
|
tok->str() == MathLib::multiply(tok->strAt(2), MathLib::divide(tok->str(), tok->strAt(2)))) {
|
|
tok->deleteNext(2);
|
|
}
|
|
|
|
else {
|
|
ret |= simplifyNumericCalculations(tok);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
bool TemplateSimplifier::simplifyTemplateInstantions(
|
|
TokenList& tokenlist,
|
|
ErrorLogger& errorlogger,
|
|
const Settings *_settings,
|
|
const Token *tok,
|
|
std::list<Token *> &templateInstantiations,
|
|
std::set<std::string> &expandedtemplates)
|
|
{
|
|
// this variable is not used at the moment. The intention was to
|
|
// allow continuous instantiations until all templates has been expanded
|
|
//bool done = false;
|
|
|
|
// Contains tokens such as "T"
|
|
std::vector<const Token *> typeParametersInDeclaration;
|
|
for (tok = tok->tokAt(2); tok && tok->str() != ">"; tok = tok->next()) {
|
|
if (Token::Match(tok, "%var% ,|>"))
|
|
typeParametersInDeclaration.push_back(tok);
|
|
}
|
|
|
|
// bail out if the end of the file was reached
|
|
if (!tok)
|
|
return false;
|
|
|
|
// get the position of the template name
|
|
int namepos = TemplateSimplifier::getTemplateNamePosition(tok);
|
|
if (namepos == -1) {
|
|
// debug message that we bail out..
|
|
if (_settings->debugwarnings) {
|
|
std::list<const Token *> callstack(1, tok);
|
|
errorlogger.reportErr(ErrorLogger::ErrorMessage(callstack, &tokenlist, Severity::debug, "debug", "simplifyTemplates: bailing out", false));
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// name of template function/class..
|
|
const std::string name(tok->strAt(namepos));
|
|
|
|
const bool isfunc(tok->strAt(namepos + 1) == "(");
|
|
|
|
// locate template usage..
|
|
std::string::size_type amountOftemplateInstantiations = templateInstantiations.size();
|
|
unsigned int recursiveCount = 0;
|
|
|
|
bool instantiated = false;
|
|
|
|
for (std::list<Token *>::const_iterator iter2 = templateInstantiations.begin(); iter2 != templateInstantiations.end(); ++iter2) {
|
|
if (amountOftemplateInstantiations != templateInstantiations.size()) {
|
|
amountOftemplateInstantiations = templateInstantiations.size();
|
|
simplifyCalculations(tokenlist.front());
|
|
++recursiveCount;
|
|
if (recursiveCount > 100) {
|
|
// bail out..
|
|
break;
|
|
}
|
|
}
|
|
|
|
Token * const tok2 = *iter2;
|
|
if (tok2->str() != name)
|
|
continue;
|
|
|
|
if (Token::Match(tok2->previous(), "[;{}=]") &&
|
|
!TemplateSimplifier::instantiateMatch(*iter2, name, typeParametersInDeclaration.size(), isfunc ? "(" : "*| %var%"))
|
|
continue;
|
|
|
|
// New type..
|
|
std::vector<const Token *> typesUsedInTemplateInstantion;
|
|
std::string typeForNewNameStr;
|
|
std::string templateMatchPattern(name + " < ");
|
|
unsigned int indentlevel = 0;
|
|
for (const Token *tok3 = tok2->tokAt(2); tok3 && (indentlevel > 0 || tok3->str() != ">"); tok3 = tok3->next()) {
|
|
// #2648 - unhandled parenthesis => bail out
|
|
// #2721 - unhandled [ => bail out
|
|
if (tok3->str() == "(" || tok3->str() == "[") {
|
|
typeForNewNameStr.clear();
|
|
break;
|
|
}
|
|
if (!tok3->next()) {
|
|
typeForNewNameStr.clear();
|
|
break;
|
|
}
|
|
if (tok3->str() == "<" && templateParameters(tok3) > 0)
|
|
++indentlevel;
|
|
else if (indentlevel > 0 && Token::Match(tok3, "> [,>]"))
|
|
--indentlevel;
|
|
templateMatchPattern += tok3->str();
|
|
templateMatchPattern += " ";
|
|
if (indentlevel == 0 && Token::Match(tok3->previous(), "[<,]"))
|
|
typesUsedInTemplateInstantion.push_back(tok3);
|
|
// add additional type information
|
|
if (tok3->isUnsigned())
|
|
typeForNewNameStr += "unsigned";
|
|
else if (tok3->isSigned())
|
|
typeForNewNameStr += "signed";
|
|
if (tok3->isLong())
|
|
typeForNewNameStr += "long";
|
|
typeForNewNameStr += tok3->str();
|
|
}
|
|
templateMatchPattern += ">";
|
|
const std::string typeForNewName(typeForNewNameStr);
|
|
|
|
if (typeForNewName.empty() || typeParametersInDeclaration.size() != typesUsedInTemplateInstantion.size()) {
|
|
if (_settings->debugwarnings) {
|
|
std::list<const Token *> callstack(1, tok);
|
|
errorlogger.reportErr(ErrorLogger::ErrorMessage(callstack, &tokenlist, Severity::debug, "debg",
|
|
"Failed to instantiate template. The checking continues anyway.", false));
|
|
}
|
|
if (typeForNewName.empty())
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
// New classname/funcname..
|
|
const std::string newName(name + "<" + typeForNewName + ">");
|
|
|
|
if (expandedtemplates.find(newName) == expandedtemplates.end()) {
|
|
expandedtemplates.insert(newName);
|
|
TemplateSimplifier::expandTemplate(tokenlist, tok,name,typeParametersInDeclaration,newName,typesUsedInTemplateInstantion,templateInstantiations);
|
|
instantiated = true;
|
|
}
|
|
|
|
// Replace all these template usages..
|
|
std::list< std::pair<Token *, Token *> > removeTokens;
|
|
for (Token *tok4 = tok2; tok4; tok4 = tok4->next()) {
|
|
if (Token::simpleMatch(tok4, templateMatchPattern.c_str())) {
|
|
Token * tok5 = tok4->tokAt(2);
|
|
unsigned int typeCountInInstantion = 1U; // There is always atleast one type
|
|
const Token *typetok = (!typesUsedInTemplateInstantion.empty()) ? typesUsedInTemplateInstantion[0] : 0;
|
|
unsigned int indentlevel5 = 0; // indentlevel for tok5
|
|
while (tok5 && (indentlevel5 > 0 || tok5->str() != ">")) {
|
|
if (tok5->str() == "<" && templateParameters(tok5) > 0)
|
|
++indentlevel5;
|
|
else if (indentlevel5 > 0 && Token::Match(tok5, "> [,>]"))
|
|
--indentlevel5;
|
|
else if (indentlevel5 == 0) {
|
|
if (tok5->str() != ",") {
|
|
if (!typetok ||
|
|
tok5->isUnsigned() != typetok->isUnsigned() ||
|
|
tok5->isSigned() != typetok->isSigned() ||
|
|
tok5->isLong() != typetok->isLong()) {
|
|
break;
|
|
}
|
|
|
|
typetok = typetok ? typetok->next() : 0;
|
|
} else {
|
|
typetok = (typeCountInInstantion < typesUsedInTemplateInstantion.size()) ? typesUsedInTemplateInstantion[typeCountInInstantion] : 0;
|
|
++typeCountInInstantion;
|
|
}
|
|
}
|
|
tok5 = tok5->next();
|
|
}
|
|
|
|
// matching template usage => replace tokens..
|
|
// Foo < int > => Foo<int>
|
|
if (tok5 && tok5->str() == ">" && typeCountInInstantion == typesUsedInTemplateInstantion.size()) {
|
|
tok4->str(newName);
|
|
for (Token *tok6 = tok4->next(); tok6 != tok5; tok6 = tok6->next()) {
|
|
if (tok6->isName())
|
|
templateInstantiations.remove(tok6);
|
|
}
|
|
removeTokens.push_back(std::pair<Token*,Token*>(tok4, tok5->next()));
|
|
}
|
|
|
|
tok4 = tok5;
|
|
if (!tok4)
|
|
break;
|
|
}
|
|
}
|
|
while (!removeTokens.empty()) {
|
|
Token::eraseTokens(removeTokens.back().first, removeTokens.back().second);
|
|
removeTokens.pop_back();
|
|
}
|
|
}
|
|
|
|
// Template has been instantiated .. then remove the template declaration
|
|
return instantiated;
|
|
}
|
|
|
|
|
|
void TemplateSimplifier::simplifyTemplates(
|
|
TokenList& tokenlist,
|
|
ErrorLogger& errorlogger,
|
|
const Settings *_settings,
|
|
bool &_codeWithTemplates
|
|
)
|
|
{
|
|
|
|
std::set<std::string> expandedtemplates(TemplateSimplifier::expandSpecialized(tokenlist.front()));
|
|
|
|
// Locate templates and set member variable _codeWithTemplates if the code has templates.
|
|
// this info is used by checks
|
|
std::list<Token *> templates(TemplateSimplifier::getTemplateDeclarations(tokenlist.front(), _codeWithTemplates));
|
|
|
|
if (templates.empty())
|
|
return;
|
|
|
|
// There are templates..
|
|
// Remove "typename" unless used in template arguments..
|
|
for (Token *tok = tokenlist.front(); tok; tok = tok->next()) {
|
|
if (tok->str() == "typename")
|
|
tok->deleteThis();
|
|
|
|
if (Token::simpleMatch(tok, "template <")) {
|
|
while (tok && tok->str() != ">")
|
|
tok = tok->next();
|
|
if (!tok)
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Locate possible instantiations of templates..
|
|
std::list<Token *> templateInstantiations(TemplateSimplifier::getTemplateInstantiations(tokenlist.front()));
|
|
|
|
// No template instantiations? Then return.
|
|
if (templateInstantiations.empty())
|
|
return;
|
|
|
|
// Template arguments with default values
|
|
TemplateSimplifier::useDefaultArgumentValues(templates, templateInstantiations);
|
|
|
|
// expand templates
|
|
//bool done = false;
|
|
//while (!done)
|
|
{
|
|
//done = true;
|
|
std::list<Token *> templates2;
|
|
for (std::list<Token *>::reverse_iterator iter1 = templates.rbegin(); iter1 != templates.rend(); ++iter1) {
|
|
bool instantiated = TemplateSimplifier::simplifyTemplateInstantions(tokenlist,
|
|
errorlogger,
|
|
_settings,
|
|
*iter1,
|
|
templateInstantiations,
|
|
expandedtemplates);
|
|
if (instantiated)
|
|
templates2.push_back(*iter1);
|
|
}
|
|
|
|
for (std::list<Token *>::iterator it = templates2.begin(); it != templates2.end(); ++it) {
|
|
std::list<Token *>::iterator it1 = std::find(templates.begin(), templates.end(), *it);
|
|
if (it1 != templates.end()) {
|
|
templates.erase(it1);
|
|
removeTemplate(*it);
|
|
}
|
|
}
|
|
}
|
|
}
|