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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2025 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/>.
*/
#include "pathmatch.h"
#include "path.h"
#include <algorithm>
#include <stack>
#include <string>
#include <utility>
#include <vector>
PathMatch::PathMatch(std::vector<std::string> patterns, std::string basepath, Syntax syntax) :
mPatterns(std::move(patterns)), mBasepath(std::move(basepath)), mSyntax(syntax)
{}
bool PathMatch::match(const std::string &path, Filemode mode) const
{
return std::any_of(mPatterns.cbegin(), mPatterns.cend(), [=] (const std::string &pattern) {
return match(pattern, path, mBasepath, mode, mSyntax);
});
}
bool PathMatch::match(const std::string &pattern, const std::string &path, const std::string &basepath, Filemode mode, Syntax syntax)
{
/* Fast paths for common patterns */
if (pattern.empty())
return false;
if (pattern == "*" || pattern == "**")
return true;
/* If the pattern ends with a path separator it matches only directories. If the path names a regular file then
* the last path component can't match. */
bool dir_mismatch = PathIterator::issep(pattern.back(), syntax) && mode != Filemode::directory;
if (!dir_mismatch && pattern == path)
return true;
/* A "real" pattern is absolute or relative to the base path. A pattern that isn't real can match at any
* path component boundary. */
bool real = Path::isAbsolute(pattern) || isRelativePattern(pattern);
/* Pattern iterator */
PathIterator s = PathIterator::fromPattern(pattern, basepath, syntax);
/* Path iterator */
PathIterator t = PathIterator::fromPath(path, basepath, syntax);
if (dir_mismatch) {
/* Final compponent can't match, so skip it. */
while (*t != '\0' && *t != '/')
++t;
}
/* Pattern restart position */
PathIterator p = s;
/* Path restart position */
PathIterator q = t;
/* Backtrack stack */
std::stack<std::pair<PathIterator::Pos, PathIterator::Pos>> b;
for (;;) {
switch (*s) {
/* Star or star-star, matches any number of characters */
case '*': {
bool slash = false;
++s;
if (*s == '*') {
/* Star-star matches slashes as well */
slash = true;
++s;
}
while (*t != '\0' && (slash || *t != '/')) {
if (*s == *t) {
/* Could stop here, but do greedy match and add
* backtrack instead */
b.emplace(s.getpos(), t.getpos());
}
++t;
}
continue;
}
/* Single character wildcard */
case '?': {
if (*t != '\0' && *t != '/') {
++s;
++t;
continue;
}
break;
}
/* Start of pattern; matches start of path, or a path separator if the
* pattern is not "real" (an absolute or relative path). */
case '\0': {
if (*t == '\0' || (*t == '/' && !real))
return true;
break;
}
/* Literal character */
default: {
if (*s == *t) {
++s;
++t;
continue;
}
break;
}
}
/* No match, try to backtrack */
if (!b.empty()) {
const auto bp = b.top();
b.pop();
s.setpos(bp.first);
t.setpos(bp.second);
continue;
}
/* Couldn't backtrack, try matching from the next path separator */
while (*q != '\0' && *q != '/')
++q;
if (*q == '/') {
++q;
s = p;
t = q;
continue;
}
/* No more path seperators to try from */
return false;
}
}
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