cppcheck/lib/utils.h

220 lines
6.0 KiB
C++

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2019 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 utilsH
#define utilsH
//---------------------------------------------------------------------------
#include <algorithm>
#include <cctype>
#include <cstddef>
#include <string>
#include <stack>
inline bool endsWith(const std::string &str, char c)
{
return str[str.size()-1U] == c;
}
inline bool endsWith(const std::string &str, const char end[], std::size_t endlen)
{
return (str.size() >= endlen) && (str.compare(str.size()-endlen, endlen, end)==0);
}
inline static bool isPrefixStringCharLiteral(const std::string &str, char q, const std::string& p)
{
if (!endsWith(str, q))
return false;
if ((str.length() + 1) > p.length() && (str.compare(0, p.size() + 1, p + q) == 0))
return true;
return false;
}
inline static bool isStringCharLiteral(const std::string &str, char q)
{
for (const std::string & p: {
"", "u8", "u", "U", "L"
}) {
if (isPrefixStringCharLiteral(str, q, p))
return true;
}
return false;
}
inline static bool isStringLiteral(const std::string &str)
{
return isStringCharLiteral(str, '"');
}
inline static bool isCharLiteral(const std::string &str)
{
return isStringCharLiteral(str, '\'');
}
inline static std::string getStringCharLiteral(const std::string &str, char q)
{
const std::size_t quotePos = str.find(q);
return str.substr(quotePos + 1U, str.size() - quotePos - 2U);
}
inline static std::string getStringLiteral(const std::string &str)
{
if (isStringLiteral(str))
return getStringCharLiteral(str, '"');
return "";
}
inline static std::string getCharLiteral(const std::string &str)
{
if (isCharLiteral(str))
return getStringCharLiteral(str, '\'');
return "";
}
inline static const char *getOrdinalText(int i)
{
if (i == 1)
return "st";
if (i == 2)
return "nd";
if (i == 3)
return "rd";
return "th";
}
inline static int caseInsensitiveStringCompare(const std::string &lhs, const std::string &rhs)
{
if (lhs.size() != rhs.size())
return (lhs.size() < rhs.size()) ? -1 : 1;
for (unsigned int i = 0; i < lhs.size(); ++i) {
const int c1 = std::toupper(lhs[i]);
const int c2 = std::toupper(rhs[i]);
if (c1 != c2)
return (c1 < c2) ? -1 : 1;
}
return 0;
}
inline static bool isValidGlobPattern(const std::string& pattern)
{
for (std::string::const_iterator i = pattern.begin(); i != pattern.end(); ++i) {
if (*i == '*' || *i == '?') {
std::string::const_iterator j = i + 1;
if (j != pattern.end() && (*j == '*' || *j == '?')) {
return false;
}
}
}
return true;
}
inline static bool matchglob(const std::string& pattern, const std::string& name)
{
const char* p = pattern.c_str();
const char* n = name.c_str();
std::stack<std::pair<const char*, const char*> > backtrack;
for (;;) {
bool matching = true;
while (*p != '\0' && matching) {
switch (*p) {
case '*':
// Step forward until we match the next character after *
while (*n != '\0' && *n != p[1]) {
n++;
}
if (*n != '\0') {
// If this isn't the last possibility, save it for later
backtrack.push(std::make_pair(p, n));
}
break;
case '?':
// Any character matches unless we're at the end of the name
if (*n != '\0') {
n++;
} else {
matching = false;
}
break;
default:
// Non-wildcard characters match literally
if (*n == *p) {
n++;
} else if (*n == '\\' && *p == '/') {
n++;
} else if (*n == '/' && *p == '\\') {
n++;
} else {
matching = false;
}
break;
}
p++;
}
// If we haven't failed matching and we've reached the end of the name, then success
if (matching && *n == '\0') {
return true;
}
// If there are no other paths to try, then fail
if (backtrack.empty()) {
return false;
}
// Restore pointers from backtrack stack
p = backtrack.top().first;
n = backtrack.top().second;
backtrack.pop();
// Advance name pointer by one because the current position didn't work
n++;
}
}
#define UNUSED(x) (void)(x)
// Use the nonneg macro when you want to assert that a variable/argument is not negative
#ifdef __CPPCHECK__
#define nonneg __cppcheck_low__(0)
#elif defined(NONNEG)
// Enable non-negative values checking
// TODO : investigate using annotations/contracts for stronger value checking
#define nonneg unsigned
#else
// Disable non-negative values checking
#define nonneg
#endif
#if defined(__has_feature)
#if __has_feature(address_sanitizer)
#define ASAN 1
#endif
#endif
#ifndef ASAN
#ifdef __SANITIZE_ADDRESS__
#define ASAN 1
#else
#define ASAN 0
#endif
#endif
#endif