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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2012 Daniel Marjamäki and 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/>.
*/
#ifndef NDEBUG
#include "checkinternal.h"
#include "symboldatabase.h"
#include <string>
#include <set>
// 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->type() != Token::eString)
continue;
const std::string pattern = pattern_tok->strValue();
if (pattern.empty()) {
simplePatternError(tok, pattern, funcname);
continue;
}
// Check for signs of complex patterns
if (pattern.find_first_of("[|%") != std::string::npos)
continue;
else if (pattern.find("!!") != std::string::npos)
continue;
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->type() != 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) {
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.find_first_of("%") != std::string::npos || pattern.find("!!") != std::string::npos)
complexPatternError(tok, pattern, funcname);
}
}
void CheckInternal::checkMissingPercentCharacter()
{
static std::set<std::string> magics;
if (magics.empty()) {
magics.insert("%any%");
magics.insert("%var%");
magics.insert("%type%");
magics.insert("%num%");
magics.insert("%bool%");
magics.insert("%str%");
magics.insert("%varid%");
magics.insert("%or%");
magics.insert("%oror%");
}
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->type() != 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;
}
}
}
}
void CheckInternal::checkUnknownPattern()
{
static std::set<std::string> knownPatterns;
if (knownPatterns.empty()) {
knownPatterns.insert("%any%");
knownPatterns.insert("%var%");
knownPatterns.insert("%type%");
knownPatterns.insert("%num%");
knownPatterns.insert("%bool%");
knownPatterns.insert("%str%");
knownPatterns.insert("%varid%");
knownPatterns.insert("%or%");
knownPatterns.insert("%oror%");
knownPatterns.insert("%op%");
}
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->type() != 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) {
std::string::size_type end = pattern.find('%', i+1);
if (end != std::string::npos) {
std::string s = pattern.substr(i, end-i+1);
if (knownPatterns.find(s) == knownPatterns.end())
unknownPatternError(tok, s);
}
}
}
}
}
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 + "\"");
}
#endif // #ifndef NDEBUG
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