6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
95 lines
3.4 KiB
C++
95 lines
3.4 KiB
C++
//===-- GlobPattern.h - glob pattern matcher implementation -*- C++ -*-----===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements a glob pattern matcher.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SUPPORT_GLOBPATTERN_H
|
|
#define LLVM_SUPPORT_GLOBPATTERN_H
|
|
|
|
#include "llvm/ADT/BitVector.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/Support/Error.h"
|
|
#include <optional>
|
|
|
|
namespace llvm {
|
|
|
|
/// This class implements a glob pattern matcher similar to the one found in
|
|
/// bash, but with some key differences. Namely, that \p "*" matches all
|
|
/// characters and does not exclude path separators.
|
|
///
|
|
/// * \p "?" matches a single character.
|
|
/// * \p "*" matches zero or more characters.
|
|
/// * \p "[<chars>]" matches one character in the bracket. Character ranges,
|
|
/// e.g., \p "[a-z]", and negative sets via \p "[^ab]" or \p "[!ab]" are also
|
|
/// supported.
|
|
/// * \p "{<glob>,...}" matches one of the globs in the list. Nested brace
|
|
/// expansions are not supported. If \p MaxSubPatterns is empty then
|
|
/// brace expansions are not supported and characters \p "{,}" are treated as
|
|
/// literals.
|
|
/// * \p "\" escapes the next character so it is treated as a literal.
|
|
///
|
|
///
|
|
/// Some known edge cases are:
|
|
/// * \p "]" is allowed as the first character in a character class, i.e.,
|
|
/// \p "[]]" is valid and matches the literal \p "]".
|
|
/// * The empty character class, i.e., \p "[]", is invalid.
|
|
/// * Empty or singleton brace expansions, e.g., \p "{}", \p "{a}", are invalid.
|
|
/// * \p "}" and \p "," that are not inside a brace expansion are taken as
|
|
/// literals, e.g., \p ",}" is valid but \p "{" is not.
|
|
///
|
|
///
|
|
/// For example, \p "*[/\\]foo.{c,cpp}" will match (unix or windows) paths to
|
|
/// all files named \p "foo.c" or \p "foo.cpp".
|
|
class GlobPattern {
|
|
public:
|
|
/// \param Pat the pattern to match against
|
|
/// \param MaxSubPatterns if provided limit the number of allowed subpatterns
|
|
/// created from expanding braces otherwise disable
|
|
/// brace expansion
|
|
static Expected<GlobPattern>
|
|
create(StringRef Pat, std::optional<size_t> MaxSubPatterns = {});
|
|
/// \returns \p true if \p S matches this glob pattern
|
|
bool match(StringRef S) const;
|
|
|
|
// Returns true for glob pattern "*". Can be used to avoid expensive
|
|
// preparation/acquisition of the input for match().
|
|
bool isTrivialMatchAll() const {
|
|
if (!Prefix.empty())
|
|
return false;
|
|
if (SubGlobs.size() != 1)
|
|
return false;
|
|
return SubGlobs[0].getPat() == "*";
|
|
}
|
|
|
|
private:
|
|
StringRef Prefix;
|
|
|
|
struct SubGlobPattern {
|
|
/// \param Pat the pattern to match against
|
|
static Expected<SubGlobPattern> create(StringRef Pat);
|
|
/// \returns \p true if \p S matches this glob pattern
|
|
bool match(StringRef S) const;
|
|
StringRef getPat() const { return StringRef(Pat.data(), Pat.size()); }
|
|
|
|
// Brackets with their end position and matched bytes.
|
|
struct Bracket {
|
|
size_t NextOffset;
|
|
BitVector Bytes;
|
|
};
|
|
SmallVector<Bracket, 0> Brackets;
|
|
SmallVector<char, 0> Pat;
|
|
};
|
|
SmallVector<SubGlobPattern, 1> SubGlobs;
|
|
};
|
|
}
|
|
|
|
#endif // LLVM_SUPPORT_GLOBPATTERN_H
|