811 lines
20 KiB
C++
811 lines
20 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2011 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 "token.h"
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#include "errorlogger.h"
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#include "check.h"
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#include <cassert>
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#include <cstdlib>
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#include <cstring>
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#include <string>
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#include <iostream>
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#include <cctype>
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#include <sstream>
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#include <map>
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Token::Token(Token **t) :
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tokensBack(t),
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_str(""),
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_isName(false),
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_isNumber(false),
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_isBoolean(false),
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_isUnsigned(false),
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_isSigned(false),
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_isLong(false),
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_isUnused(false),
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_varId(0),
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_next(0),
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_previous(0),
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_link(0),
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_fileIndex(0),
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_linenr(0),
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_progressValue(0)
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{
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}
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Token::~Token()
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{
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}
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void Token::str(const std::string &s)
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{
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_str = s;
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_isName = bool(_str[0] == '_' || std::isalpha(_str[0]));
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if (std::isdigit(_str[0]))
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_isNumber = true;
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else if (_str.length() > 1 && _str[0] == '-' && std::isdigit(_str[1]))
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_isNumber = true;
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else
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_isNumber = false;
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if (_str == "true" || _str == "false")
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_isBoolean = true;
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else
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_isBoolean = false;
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_varId = 0;
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}
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void Token::concatStr(std::string const& b)
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{
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_str.erase(_str.length() - 1);
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_str.append(b.begin() + 1, b.end());
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}
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std::string Token::strValue() const
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{
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assert(_str.length() >= 2);
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assert(_str[0] == '"');
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assert(_str[_str.length()-1] == '"');
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return _str.substr(1, _str.length() - 2);
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}
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void Token::deleteNext()
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{
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Token *n = _next;
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_next = n->next();
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delete n;
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if (_next)
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_next->previous(this);
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else if (tokensBack)
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*tokensBack = this;
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}
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void Token::deleteThis()
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{
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if (_next)
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{
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_str = _next->_str;
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_isName = _next->_isName;
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_isNumber = _next->_isNumber;
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_isBoolean = _next->_isBoolean;
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_isUnsigned = _next->_isUnsigned;
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_isSigned = _next->_isSigned;
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_isLong = _next->_isLong;
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_isUnused = _next->_isUnused;
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_varId = _next->_varId;
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_fileIndex = _next->_fileIndex;
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_linenr = _next->_linenr;
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_link = _next->_link;
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if (_link)
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_link->link(this);
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deleteNext();
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}
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else if (_previous)
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{
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// This should never be used for tokens
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// at the end of the list
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str(";");
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}
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else
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{
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// We are the last token in the list, we can't delete
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// ourselves, so just make us ;
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str(";");
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}
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}
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void Token::replace(Token *replaceThis, Token *start, Token *end)
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{
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// Fix the whole in the old location of start and end
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if (start->previous())
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start->previous()->next(end->next());
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if (end->next())
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end->next()->previous(start->previous());
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// Move start and end to their new location
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if (replaceThis->previous())
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replaceThis->previous()->next(start);
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if (replaceThis->next())
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replaceThis->next()->previous(end);
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start->previous(replaceThis->previous());
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end->next(replaceThis->next());
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if (end->tokensBack && *(end->tokensBack) == end)
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{
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while (end->next())
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end = end->next();
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*(end->tokensBack) = end;
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}
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// Delete old token, which is replaced
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delete replaceThis;
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}
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const Token *Token::tokAt(int index) const
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{
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const Token *tok = this;
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int num = std::abs(index);
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while (num > 0 && tok)
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{
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if (index > 0)
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tok = tok->next();
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else
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tok = tok->previous();
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--num;
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}
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return tok;
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}
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Token *Token::tokAt(int index)
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{
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Token *tok = this;
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int num = std::abs(index);
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while (num > 0 && tok)
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{
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if (index > 0)
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tok = tok->next();
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else
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tok = tok->previous();
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--num;
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}
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return tok;
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}
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std::string Token::strAt(int index) const
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{
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const Token *tok = this->tokAt(index);
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return tok ? tok->_str.c_str() : "";
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}
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static bool strisop(const char str[])
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{
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if (str[1] == 0)
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{
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if (strchr("+-*/%&|^~!<>", *str))
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return true;
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}
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else if (str[2] == 0)
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{
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if (strcmp(str, "&&")==0 ||
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strcmp(str, "||")==0 ||
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strcmp(str, "==")==0 ||
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strcmp(str, "!=")==0 ||
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strcmp(str, ">=")==0 ||
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strcmp(str, "<=")==0 ||
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strcmp(str, ">>")==0 ||
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strcmp(str, "<<")==0)
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return true;
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}
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return false;
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}
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int Token::multiCompare(const char *haystack, const char *needle)
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{
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if (strncmp(haystack, "%op%|", 5) == 0)
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{
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haystack = haystack + 5;
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if (strisop(needle))
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return 1;
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}
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bool emptyStringFound = false;
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const char *needlePointer = needle;
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while (true)
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{
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if (*needlePointer == *haystack)
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{
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if (*needlePointer == '\0')
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return 1;
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++needlePointer;
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++haystack;
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}
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else if (*haystack == '|')
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{
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if (*needlePointer == 0)
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{
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// If needle is at the end, we have a match.
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return 1;
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}
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else if (needlePointer == needle)
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{
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// If needlePointer was not increased at all, we had a empty
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// string in the haystack
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emptyStringFound = true;
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}
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needlePointer = needle;
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++haystack;
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}
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else if (*haystack == ' ' || *haystack == '\0')
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{
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if (needlePointer == needle)
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return 0;
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break;
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}
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// If haystack and needle don't share the same character,
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// find next '|' character.
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else
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{
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needlePointer = needle;
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do
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{
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++haystack;
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}
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while (*haystack != ' ' && *haystack != '|' && *haystack);
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if (*haystack == ' ' || *haystack == '\0')
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{
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return emptyStringFound ? 0 : -1;
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}
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++haystack;
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if (strncmp(haystack, "%op%", 4) == 0)
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{
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if (strisop(needle))
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return 1;
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haystack = haystack + 4;
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if (*haystack == '|')
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haystack++;
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else if (*haystack == ' ' || *haystack == '\0')
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return emptyStringFound ? 0 : -1;
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else
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return -1;
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}
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}
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}
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if (*needlePointer == '\0')
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return 1;
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// If empty string was found earlier from the haystack
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if (emptyStringFound)
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return 0;
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return -1;
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}
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bool Token::simpleMatch(const Token *tok, const char pattern[])
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{
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const char *current, *next;
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current = pattern;
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next = strchr(pattern, ' ');
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if (!next)
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next = pattern + strlen(pattern);
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while (*current)
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{
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size_t length = static_cast<size_t>(next - current);
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if (!tok || length != tok->_str.length() || strncmp(current, tok->_str.c_str(), length))
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return false;
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current = next;
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if (*next)
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{
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next = strchr(++current, ' ');
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if (!next)
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next = current + strlen(current);
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}
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tok = tok->next();
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}
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return true;
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}
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int Token::firstWordEquals(const char *str, const char *word)
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{
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for (;;)
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{
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if (*str != *word)
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{
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if (*str == ' ' && *word == 0)
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return 0;
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return 1;
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}
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else if (*str == 0)
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break;
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++str;
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++word;
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}
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return 0;
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}
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const char *Token::chrInFirstWord(const char *str, char c)
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{
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for (;;)
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{
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if (*str == ' ' || *str == 0)
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return 0;
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if (*str == c)
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return str;
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++str;
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}
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}
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int Token::firstWordLen(const char *str)
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{
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int len = 0;
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for (;;)
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{
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if (*str == ' ' || *str == 0)
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break;
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++len;
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++str;
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}
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return len;
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}
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bool Token::Match(const Token *tok, const char pattern[], unsigned int varid)
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{
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const char *p = pattern;
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bool firstpattern = true;
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while (*p)
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{
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// Skip spaces in pattern..
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while (*p == ' ')
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++p;
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// No token => Success!
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if (*p == 0)
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return true;
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if (!tok)
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{
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// If we have no tokens, pattern "!!else" should return true
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if (p[1] == '!' && p[0] == '!' && p[2] != '\0')
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{
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while (*p && *p != ' ')
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++p;
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continue;
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}
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else
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return false;
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}
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// If we are in the first token, we skip all initial !! patterns
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if (firstpattern && !tok->previous() && tok->next() && p[1] == '!' && p[0] == '!' && p[2] != '\0')
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{
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while (*p && *p != ' ')
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++p;
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continue;
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}
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firstpattern = false;
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// Compare the first character of the string for optimization reasons
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// before doing more detailed checks.
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bool patternUnderstood = false;
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if (p[0] == '%')
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{
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switch (p[1])
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{
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case 'v':
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// TODO: %var% should match only for
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// variables that have varId != 0, but that needs a lot of
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// work, before that change can be made.
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// Any symbolname..
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if (p[4] == '%') // %var%
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{
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if (!tok->isName())
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return false;
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p += 5;
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patternUnderstood = true;
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}
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else // %varid%
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{
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if (varid == 0)
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{
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std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
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const ErrorLogger::ErrorMessage errmsg(locationList,
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Severity::error,
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"Internal error. Token::Match called with varid 0.",
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"cppcheckError");
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Check::reportError(errmsg);
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}
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if (tok->varId() != varid)
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return false;
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p += 7;
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patternUnderstood = true;
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}
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break;
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case 't':
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// Type (%type%)
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{
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if (!tok->isName())
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return false;
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if (tok->varId() != 0)
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return false;
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if (tok->str() == "delete")
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return false;
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p += 6;
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patternUnderstood = true;
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}
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break;
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case 'a':
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// Accept any token (%any%)
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{
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p += 5;
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patternUnderstood = true;
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}
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break;
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case 'n':
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// Number (%num)
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{
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if (!tok->isNumber())
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return false;
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p += 5;
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patternUnderstood = true;
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}
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break;
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case 's':
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// String (%str%)
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{
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if (tok->_str[0] != '\"')
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return false;
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p += 5;
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patternUnderstood = true;
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}
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break;
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case 'b':
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// Bool (%bool%)
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{
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if (!tok->isBoolean())
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return false;
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p += 6;
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patternUnderstood = true;
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}
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break;
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case 'o':
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// Or (%or%)
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if (p[3] == '%')
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{
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if (tok->str() != "|")
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return false;
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p += 4;
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patternUnderstood = true;
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}
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// Oror (%oror%)
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else
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{
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if (tok->str() != "||")
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return false;
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p += 6;
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patternUnderstood = true;
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}
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break;
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default:
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if (firstWordEquals(p, tok->_str.c_str()))
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{
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p += tok->_str.length();
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patternUnderstood = true;
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}
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break;
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}
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if (!patternUnderstood)
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{
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return false;
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}
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tok = tok->next();
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continue;
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}
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// [.. => search for a one-character token..
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else if (p[0] == '[' && tok->_str.length() == 1 && chrInFirstWord(p, ']'))
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{
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const char *temp = p + 1;
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bool chrFound = false;
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int count = 0;
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while (*temp && *temp != ' ')
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{
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if (*temp == ']')
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{
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++count;
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++temp;
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continue;
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}
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if (*temp == tok->_str[0])
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{
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chrFound = true;
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break;
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}
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++temp;
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}
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if (count > 1)
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{
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if (tok->_str[0] == ']')
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chrFound = true;
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}
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if (!chrFound)
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return false;
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}
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// Parse multi options, such as void|int|char (accept token which is one of these 3)
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else if (chrInFirstWord(p, '|') && (p[0] != '|' || firstWordLen(p) > 2))
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{
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int res = multiCompare(p, tok->_str.c_str());
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if (res == 0)
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{
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// Empty alternative matches, use the same token on next round
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while (*p && *p != ' ')
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++p;
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continue;
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}
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else if (res == -1)
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{
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// No match
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return false;
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}
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}
|
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|
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// Parse "not" options. Token can be anything except the given one
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else if (p[1] == '!' && p[0] == '!' && p[2] != '\0')
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{
|
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if (firstWordEquals(&(p[2]), tok->str().c_str()) == 0)
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return false;
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}
|
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else if (firstWordEquals(p, tok->_str.c_str()) != 0)
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{
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return false;
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}
|
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|
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while (*p && *p != ' ')
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++p;
|
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|
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tok = tok->next();
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}
|
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|
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// The end of the pattern has been reached and nothing wrong has been found
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return true;
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}
|
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|
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size_t Token::getStrLength(const Token *tok)
|
|
{
|
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assert(tok != NULL);
|
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|
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size_t len = 0;
|
|
const std::string strValue(tok->strValue());
|
|
const char *str = strValue.c_str();
|
|
|
|
while (*str)
|
|
{
|
|
if (*str == '\\')
|
|
{
|
|
++str;
|
|
|
|
// string ends at '\0'
|
|
if (*str == '0')
|
|
break;
|
|
}
|
|
|
|
++str;
|
|
++len;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
bool Token::isStandardType() const
|
|
{
|
|
bool ret = false;
|
|
const char *type[] = {"bool", "char", "short", "int", "long", "float", "double", "size_t", 0};
|
|
for (int i = 0; type[i]; i++)
|
|
ret |= (_str == type[i]);
|
|
return ret;
|
|
}
|
|
|
|
void Token::move(Token *srcStart, Token *srcEnd, Token *newLocation)
|
|
{
|
|
/**[newLocation] -> b -> c -> [srcStart] -> [srcEnd] -> f */
|
|
|
|
// Fix the gap, which tokens to be moved will leave
|
|
srcStart->previous()->next(srcEnd->next());
|
|
srcEnd->next()->previous(srcStart->previous());
|
|
|
|
// Fix the tokens to be moved
|
|
srcEnd->next(newLocation->next());
|
|
srcStart->previous(newLocation);
|
|
|
|
// Fix the tokens at newLocation
|
|
newLocation->next()->previous(srcEnd);
|
|
newLocation->next(srcStart);
|
|
|
|
// Update _progressValue
|
|
for (Token *tok = srcStart; tok && tok != srcEnd; tok = tok->next())
|
|
tok->_progressValue = newLocation->_progressValue;
|
|
}
|
|
|
|
//---------------------------------------------------------------------------
|
|
|
|
const Token *Token::findmatch(const Token *tok, const char pattern[], unsigned int varId)
|
|
{
|
|
for (; tok; tok = tok->next())
|
|
{
|
|
if (Token::Match(tok, pattern, varId))
|
|
return tok;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
const Token *Token::findmatch(const Token *tok, const char pattern[], const Token *end, unsigned int varId)
|
|
{
|
|
for (; tok && tok != end; tok = tok->next())
|
|
{
|
|
if (Token::Match(tok, pattern, varId))
|
|
return tok;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void Token::insertToken(const std::string &tokenStr)
|
|
{
|
|
Token *newToken = new Token(tokensBack);
|
|
newToken->str(tokenStr);
|
|
newToken->_linenr = _linenr;
|
|
newToken->_fileIndex = _fileIndex;
|
|
newToken->_progressValue = _progressValue;
|
|
if (this->next())
|
|
{
|
|
newToken->next(this->next());
|
|
newToken->next()->previous(newToken);
|
|
}
|
|
else if (tokensBack)
|
|
{
|
|
*tokensBack = newToken;
|
|
}
|
|
|
|
this->next(newToken);
|
|
newToken->previous(this);
|
|
}
|
|
|
|
void Token::eraseTokens(Token *begin, const Token *end)
|
|
{
|
|
if (! begin)
|
|
return;
|
|
|
|
while (begin->next() && begin->next() != end)
|
|
{
|
|
begin->deleteNext();
|
|
}
|
|
}
|
|
|
|
void Token::createMutualLinks(Token *begin, Token *end)
|
|
{
|
|
assert(begin != NULL);
|
|
assert(end != NULL);
|
|
assert(begin != end);
|
|
begin->link(end);
|
|
end->link(begin);
|
|
}
|
|
|
|
void Token::printOut(const char *title) const
|
|
{
|
|
const std::vector<std::string> fileNames;
|
|
std::cout << stringifyList(true, title, fileNames) << std::endl;
|
|
}
|
|
|
|
void Token::printOut(const char *title, const std::vector<std::string> &fileNames) const
|
|
{
|
|
std::cout << stringifyList(true, title, fileNames) << std::endl;
|
|
}
|
|
|
|
std::string Token::stringifyList(bool varid, const char *title) const
|
|
{
|
|
const std::vector<std::string> fileNames;
|
|
return stringifyList(varid, title, fileNames);
|
|
}
|
|
|
|
std::string Token::stringifyList(bool varid, const char *title, const std::vector<std::string> &fileNames) const
|
|
{
|
|
std::ostringstream ret;
|
|
if (title)
|
|
ret << "\n### " << title << " ###\n";
|
|
|
|
unsigned int lineNumber = 0;
|
|
int fileInd = -1;
|
|
std::map<int, unsigned int> lineNumbers;
|
|
for (const Token *tok = this; tok; tok = tok->next())
|
|
{
|
|
bool fileChange = false;
|
|
if (static_cast<int>(tok->_fileIndex) != fileInd)
|
|
{
|
|
if (fileInd != -1)
|
|
{
|
|
lineNumbers[fileInd] = tok->_fileIndex;
|
|
}
|
|
|
|
fileInd = static_cast<int>(tok->_fileIndex);
|
|
ret << "\n\n##file ";
|
|
if (fileNames.size() > tok->_fileIndex)
|
|
ret << fileNames.at(tok->_fileIndex);
|
|
else
|
|
ret << fileInd;
|
|
|
|
lineNumber = lineNumbers[fileInd];
|
|
fileChange = true;
|
|
}
|
|
|
|
if (lineNumber != tok->linenr() || fileChange)
|
|
{
|
|
while (lineNumber < tok->linenr())
|
|
{
|
|
++lineNumber;
|
|
ret << "\n" << lineNumber << ":";
|
|
}
|
|
lineNumber = tok->linenr();
|
|
}
|
|
|
|
ret << " " << tok->str();
|
|
if (varid && tok->varId() > 0)
|
|
ret << "@" << tok->varId();
|
|
}
|
|
ret << "\n";
|
|
return ret.str();
|
|
}
|
|
|
|
|
|
|