358 lines
13 KiB
C++
358 lines
13 KiB
C++
/*
|
|
* Cppcheck - A tool for static C/C++ code analysis
|
|
* Copyright (C) 2007-2015 Cppcheck team.
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifdef CHECK_INTERNAL
|
|
|
|
#include "checkinternal.h"
|
|
#include "symboldatabase.h"
|
|
#include "utils.h"
|
|
#include <string>
|
|
#include <set>
|
|
#include <cstring>
|
|
|
|
// Register this check class (by creating a static instance of it).
|
|
// Disabled in release builds
|
|
namespace {
|
|
CheckInternal instance;
|
|
}
|
|
|
|
void CheckInternal::checkTokenMatchPatterns()
|
|
{
|
|
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
|
|
if (!Token::simpleMatch(tok, "Token :: Match (") && !Token::simpleMatch(tok, "Token :: findmatch ("))
|
|
continue;
|
|
|
|
const std::string& funcname = tok->strAt(2);
|
|
|
|
// Get pattern string
|
|
const Token *pattern_tok = tok->tokAt(4)->nextArgument();
|
|
if (!pattern_tok || pattern_tok->tokType() != Token::eString)
|
|
continue;
|
|
|
|
const std::string pattern = pattern_tok->strValue();
|
|
if (pattern.empty()) {
|
|
simplePatternError(tok, pattern, funcname);
|
|
continue;
|
|
}
|
|
|
|
if (pattern.find("||") != std::string::npos || pattern.find(" | ") != std::string::npos || pattern[0] == '|' || (pattern[pattern.length() - 1] == '|' && pattern[pattern.length() - 2] == ' '))
|
|
orInComplexPattern(tok, pattern, funcname);
|
|
|
|
// Check for signs of complex patterns
|
|
if (pattern.find_first_of("[|") != std::string::npos)
|
|
continue;
|
|
else if (pattern.find("!!") != std::string::npos)
|
|
continue;
|
|
|
|
bool complex = false;
|
|
size_t index = pattern.find('%');
|
|
while (index != std::string::npos) {
|
|
if (pattern.length() <= index + 2) {
|
|
complex = true;
|
|
break;
|
|
}
|
|
if (pattern[index + 1] == 'o' && pattern[index + 2] == 'r') // %or% or %oror%
|
|
index = pattern.find('%', index + 1);
|
|
else {
|
|
complex = true;
|
|
break;
|
|
}
|
|
index = pattern.find('%', index+1);
|
|
}
|
|
if (!complex)
|
|
simplePatternError(tok, pattern, funcname);
|
|
}
|
|
}
|
|
|
|
void CheckInternal::checkTokenSimpleMatchPatterns()
|
|
{
|
|
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
|
|
if (!Token::simpleMatch(tok, "Token :: simpleMatch (") && !Token::simpleMatch(tok, "Token :: findsimplematch ("))
|
|
continue;
|
|
|
|
const std::string& funcname = tok->strAt(2);
|
|
|
|
// Get pattern string
|
|
const Token *pattern_tok = tok->tokAt(4)->nextArgument();
|
|
if (!pattern_tok || pattern_tok->tokType() != Token::eString)
|
|
continue;
|
|
|
|
const std::string pattern = pattern_tok->strValue();
|
|
if (pattern.empty()) {
|
|
complexPatternError(tok, pattern, funcname);
|
|
continue;
|
|
}
|
|
|
|
// Check for [xyz] usage - but exclude standalone square brackets
|
|
unsigned int char_count = 0;
|
|
for (std::string::size_type pos = 0; pos < pattern.size(); ++pos) {
|
|
char c = pattern[pos];
|
|
|
|
if (c == ' ') {
|
|
char_count = 0;
|
|
} else if (c == ']') {
|
|
if (char_count > 0) {
|
|
complexPatternError(tok, pattern, funcname);
|
|
continue;
|
|
}
|
|
} else {
|
|
++char_count;
|
|
}
|
|
}
|
|
|
|
// Check | usage: Count characters before the symbol
|
|
char_count = 0;
|
|
for (std::string::size_type pos = 0; pos < pattern.size(); ++pos) {
|
|
const char c = pattern[pos];
|
|
|
|
if (c == ' ') {
|
|
char_count = 0;
|
|
} else if (c == '|') {
|
|
if (char_count > 0) {
|
|
complexPatternError(tok, pattern, funcname);
|
|
continue;
|
|
}
|
|
} else {
|
|
++char_count;
|
|
}
|
|
}
|
|
|
|
// Check for real errors
|
|
if (pattern.length() > 1) {
|
|
for (size_t i = 0; i < pattern.length() - 1; i++) {
|
|
if (pattern[i] == '%' && pattern[i + 1] != ' ')
|
|
complexPatternError(tok, pattern, funcname);
|
|
else if (pattern[i] == '!' && pattern[i + 1] == '!')
|
|
complexPatternError(tok, pattern, funcname);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
const std::set<std::string> magics = make_container< std::set<std::string> > ()
|
|
<< "%any%"
|
|
<< "%assign%"
|
|
<< "%bool%"
|
|
<< "%char%"
|
|
<< "%comp%"
|
|
<< "%num%"
|
|
<< "%op%"
|
|
<< "%cop%"
|
|
<< "%or%"
|
|
<< "%oror%"
|
|
<< "%str%"
|
|
<< "%type%"
|
|
<< "%name%"
|
|
<< "%varid%";
|
|
}
|
|
|
|
void CheckInternal::checkMissingPercentCharacter()
|
|
{
|
|
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
|
|
if (!Token::simpleMatch(tok, "Token :: Match (") && !Token::simpleMatch(tok, "Token :: findmatch ("))
|
|
continue;
|
|
|
|
const std::string& funcname = tok->strAt(2);
|
|
|
|
// Get pattern string
|
|
const Token *pattern_tok = tok->tokAt(4)->nextArgument();
|
|
if (!pattern_tok || pattern_tok->tokType() != Token::eString)
|
|
continue;
|
|
|
|
const std::string pattern = pattern_tok->strValue();
|
|
|
|
std::set<std::string>::const_iterator magic, magics_end = magics.end();
|
|
for (magic = magics.begin(); magic != magics_end; ++magic) {
|
|
const std::string broken_magic = (*magic).substr(0, (*magic).size()-1);
|
|
|
|
std::string::size_type pos = 0;
|
|
while ((pos = pattern.find(broken_magic, pos)) != std::string::npos) {
|
|
// Check if it's the full pattern
|
|
if (pattern.find(*magic, pos) != pos) {
|
|
// Known whitelist of substrings
|
|
if ((broken_magic == "%var" && pattern.find("%varid%", pos) == pos) ||
|
|
(broken_magic == "%or" && pattern.find("%oror%", pos) == pos)) {
|
|
++pos;
|
|
continue;
|
|
}
|
|
|
|
missingPercentCharacterError(tok, pattern, funcname);
|
|
}
|
|
|
|
++pos;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
const std::set<std::string> knownPatterns = make_container< std::set<std::string> > ()
|
|
<< "%any%"
|
|
<< "%assign%"
|
|
<< "%bool%"
|
|
<< "%char%"
|
|
<< "%comp%"
|
|
<< "%name%"
|
|
<< "%num%"
|
|
<< "%op%"
|
|
<< "%cop%"
|
|
<< "%or%"
|
|
<< "%oror%"
|
|
<< "%str%"
|
|
<< "%type%"
|
|
<< "%var%"
|
|
<< "%varid%";
|
|
}
|
|
|
|
void CheckInternal::checkUnknownPattern()
|
|
{
|
|
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
|
|
if (!Token::simpleMatch(tok, "Token :: Match (") && !Token::simpleMatch(tok, "Token :: findmatch ("))
|
|
continue;
|
|
|
|
// Get pattern string
|
|
const Token *pattern_tok = tok->tokAt(4)->nextArgument();
|
|
if (!pattern_tok || pattern_tok->tokType() != Token::eString)
|
|
continue;
|
|
|
|
const std::string pattern = pattern_tok->strValue();
|
|
bool inBrackets = false;
|
|
|
|
for (std::string::size_type i = 0; i < pattern.length()-1; i++) {
|
|
if (pattern[i] == '[' && (i == 0 || pattern[i-1] == ' '))
|
|
inBrackets = true;
|
|
else if (pattern[i] == ']')
|
|
inBrackets = false;
|
|
else if (pattern[i] == '%' && pattern[i+1] != ' ' && pattern[i+1] != '|' && !inBrackets) {
|
|
const std::string::size_type end = pattern.find('%', i+1);
|
|
if (end != std::string::npos) {
|
|
const std::string s = pattern.substr(i, end-i+1);
|
|
if (knownPatterns.find(s) == knownPatterns.end())
|
|
unknownPatternError(tok, s);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void CheckInternal::checkRedundantNextPrevious()
|
|
{
|
|
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
|
|
if (Token::Match(tok, ". previous ( ) . next|tokAt|strAt|linkAt (") || Token::Match(tok, ". next ( ) . previous|tokAt|strAt|linkAt (") ||
|
|
(Token::simpleMatch(tok, ". tokAt (") && Token::Match(tok->linkAt(2), ") . previous|next|tokAt|strAt|linkAt|str|link ("))) {
|
|
const std::string& func1 = tok->strAt(1);
|
|
const std::string& func2 = tok->linkAt(2)->strAt(2);
|
|
|
|
if ((func2 == "previous" || func2 == "next" || func2 == "str" || func2 == "link") && tok->linkAt(2)->strAt(4) != ")")
|
|
continue;
|
|
|
|
redundantNextPreviousError(tok, func1, func2);
|
|
} else if (Token::Match(tok, ". next|previous ( ) . next|previous ( ) . next|previous|linkAt|strAt|link|str (")) {
|
|
const std::string& func1 = tok->strAt(1);
|
|
const std::string& func2 = tok->strAt(9);
|
|
|
|
if ((func2 == "previous" || func2 == "next" || func2 == "str" || func2 == "link") && tok->strAt(11) != ")")
|
|
continue;
|
|
|
|
redundantNextPreviousError(tok, func1, func2);
|
|
}
|
|
}
|
|
}
|
|
|
|
void CheckInternal::checkExtraWhitespace()
|
|
{
|
|
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
|
|
if (!Token::simpleMatch(tok, "Token :: simpleMatch (") &&
|
|
!Token::simpleMatch(tok, "Token :: findsimplematch (") &&
|
|
!Token::simpleMatch(tok, "Token :: Match (") &&
|
|
!Token::simpleMatch(tok, "Token :: findmatch ("))
|
|
continue;
|
|
|
|
const std::string& funcname = tok->strAt(2);
|
|
|
|
// Get pattern string
|
|
const Token *pattern_tok = tok->tokAt(4)->nextArgument();
|
|
if (!pattern_tok || pattern_tok->tokType() != Token::eString)
|
|
continue;
|
|
|
|
const std::string pattern = pattern_tok->strValue();
|
|
if (!pattern.empty() && (pattern[0] == ' ' || *pattern.rbegin() == ' '))
|
|
extraWhitespaceError(tok, pattern, funcname);
|
|
|
|
// two whitespaces or more
|
|
if (pattern.find(" ") != std::string::npos)
|
|
extraWhitespaceError(tok, pattern, funcname);
|
|
}
|
|
}
|
|
|
|
void CheckInternal::multiComparePatternError(const Token* tok, const std::string& pattern, const std::string &funcname)
|
|
{
|
|
reportError(tok, Severity::error, "multiComparePatternError",
|
|
"Bad multicompare pattern (a %cmd% must be first unless it is %or%,%op%,%cop%,%name%,%oror%) inside Token::" + funcname + "() call: \"" + pattern + "\""
|
|
);
|
|
}
|
|
|
|
void CheckInternal::simplePatternError(const Token* tok, const std::string& pattern, const std::string &funcname)
|
|
{
|
|
reportError(tok, Severity::warning, "simplePatternError",
|
|
"Found simple pattern inside Token::" + funcname + "() call: \"" + pattern + "\""
|
|
);
|
|
}
|
|
|
|
void CheckInternal::complexPatternError(const Token* tok, const std::string& pattern, const std::string &funcname)
|
|
{
|
|
reportError(tok, Severity::error, "complexPatternError",
|
|
"Found complex pattern inside Token::" + funcname + "() call: \"" + pattern + "\""
|
|
);
|
|
}
|
|
|
|
void CheckInternal::missingPercentCharacterError(const Token* tok, const std::string& pattern, const std::string& funcname)
|
|
{
|
|
reportError(tok, Severity::error, "missingPercentCharacter",
|
|
"Missing percent end character in Token::" + funcname + "() pattern: \"" + pattern + "\""
|
|
);
|
|
}
|
|
|
|
void CheckInternal::unknownPatternError(const Token* tok, const std::string& pattern)
|
|
{
|
|
reportError(tok, Severity::error, "unknownPattern",
|
|
"Unknown pattern used: \"" + pattern + "\"");
|
|
}
|
|
|
|
void CheckInternal::redundantNextPreviousError(const Token* tok, const std::string& func1, const std::string& func2)
|
|
{
|
|
reportError(tok, Severity::style, "redundantNextPrevious",
|
|
"Call to 'Token::" + func1 + "()' followed by 'Token::" + func2 + "()' can be simplified.");
|
|
}
|
|
|
|
void CheckInternal::orInComplexPattern(const Token* tok, const std::string& pattern, const std::string &funcname)
|
|
{
|
|
reportError(tok, Severity::error, "orInComplexPattern",
|
|
"Token::" + funcname + "() pattern \"" + pattern + "\" contains \"||\" or \"|\". Replace it by \"%oror%\" or \"%or%\".");
|
|
}
|
|
|
|
void CheckInternal::extraWhitespaceError(const Token* tok, const std::string& pattern, const std::string &funcname)
|
|
{
|
|
reportError(tok, Severity::warning, "extraWhitespaceError",
|
|
"Found extra whitespace inside Token::" + funcname + "() call: \"" + pattern + "\""
|
|
);
|
|
}
|
|
|
|
#endif // #ifdef CHECK_INTERNAL
|