forked from OSchip/llvm-project
82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
//===--- tools/extra/clang-tidy/GlobList.cpp ------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "GlobList.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
|
|
namespace clang {
|
|
namespace tidy {
|
|
|
|
// Returns true if GlobList starts with the negative indicator ('-'), removes it
|
|
// from the GlobList.
|
|
static bool consumeNegativeIndicator(StringRef &GlobList) {
|
|
GlobList = GlobList.trim();
|
|
if (GlobList.startswith("-")) {
|
|
GlobList = GlobList.substr(1);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Converts first glob from the comma-separated list of globs to Regex and
|
|
// removes it and the trailing comma from the GlobList.
|
|
static llvm::Regex consumeGlob(StringRef &GlobList) {
|
|
StringRef UntrimmedGlob = GlobList.substr(0, GlobList.find(','));
|
|
StringRef Glob = UntrimmedGlob.trim();
|
|
GlobList = GlobList.substr(UntrimmedGlob.size() + 1);
|
|
SmallString<128> RegexText("^");
|
|
StringRef MetaChars("()^$|*+?.[]\\{}");
|
|
for (char C : Glob) {
|
|
if (C == '*')
|
|
RegexText.push_back('.');
|
|
else if (MetaChars.contains(C))
|
|
RegexText.push_back('\\');
|
|
RegexText.push_back(C);
|
|
}
|
|
RegexText.push_back('$');
|
|
return llvm::Regex(RegexText);
|
|
}
|
|
|
|
GlobList::GlobList(StringRef Globs, bool KeepNegativeGlobs /* =true */) {
|
|
Items.reserve(Globs.count(',') + 1);
|
|
do {
|
|
GlobListItem Item;
|
|
Item.IsPositive = !consumeNegativeIndicator(Globs);
|
|
Item.Regex = consumeGlob(Globs);
|
|
if (Item.IsPositive || KeepNegativeGlobs)
|
|
Items.push_back(std::move(Item));
|
|
} while (!Globs.empty());
|
|
}
|
|
|
|
bool GlobList::contains(StringRef S) const {
|
|
// Iterating the container backwards as the last match determins if S is in
|
|
// the list.
|
|
for (const GlobListItem &Item : llvm::reverse(Items)) {
|
|
if (Item.Regex.match(S))
|
|
return Item.IsPositive;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool CachedGlobList::contains(StringRef S) const {
|
|
switch (auto &Result = Cache[S]) {
|
|
case Yes:
|
|
return true;
|
|
case No:
|
|
return false;
|
|
case None:
|
|
Result = GlobList::contains(S) ? Yes : No;
|
|
return Result == Yes;
|
|
}
|
|
llvm_unreachable("invalid enum");
|
|
}
|
|
|
|
} // namespace tidy
|
|
} // namespace clang
|