86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
// Copyright 2010 The RE2 Authors. All Rights Reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
#ifndef RE2_SET_H_
|
|
#define RE2_SET_H_
|
|
|
|
#include <memory>
|
|
#include <string>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
#include "re2/re2.h"
|
|
|
|
namespace re2 {
|
|
class Prog;
|
|
class Regexp;
|
|
} // namespace re2
|
|
|
|
namespace re2 {
|
|
|
|
// An RE2::Set represents a collection of regexps that can
|
|
// be searched for simultaneously.
|
|
class RE2::Set {
|
|
public:
|
|
enum ErrorKind {
|
|
kNoError = 0,
|
|
kNotCompiled, // The set is not compiled.
|
|
kOutOfMemory, // The DFA ran out of memory.
|
|
kInconsistent, // The result is inconsistent. This should never happen.
|
|
};
|
|
|
|
struct ErrorInfo {
|
|
ErrorKind kind;
|
|
};
|
|
|
|
Set(const RE2::Options& options, RE2::Anchor anchor);
|
|
~Set();
|
|
|
|
// Not copyable.
|
|
Set(const Set&) = delete;
|
|
Set& operator=(const Set&) = delete;
|
|
// Movable.
|
|
Set(Set&& other);
|
|
Set& operator=(Set&& other);
|
|
|
|
// Adds pattern to the set using the options passed to the constructor.
|
|
// Returns the index that will identify the regexp in the output of Match(),
|
|
// or -1 if the regexp cannot be parsed.
|
|
// Indices are assigned in sequential order starting from 0.
|
|
// Errors do not increment the index; if error is not NULL, *error will hold
|
|
// the error message from the parser.
|
|
int Add(const StringPiece& pattern, std::string* error);
|
|
|
|
// Compiles the set in preparation for matching.
|
|
// Returns false if the compiler runs out of memory.
|
|
// Add() must not be called again after Compile().
|
|
// Compile() must be called before Match().
|
|
bool Compile();
|
|
|
|
// Returns true if text matches at least one of the regexps in the set.
|
|
// Fills v (if not NULL) with the indices of the matching regexps.
|
|
// Callers must not expect v to be sorted.
|
|
bool Match(const StringPiece& text, std::vector<int>* v) const;
|
|
|
|
// As above, but populates error_info (if not NULL) when none of the regexps
|
|
// in the set matched. This can inform callers when DFA execution fails, for
|
|
// example, because they might wish to handle that case differently.
|
|
bool Match(const StringPiece& text, std::vector<int>* v,
|
|
ErrorInfo* error_info) const;
|
|
|
|
private:
|
|
typedef std::pair<std::string, re2::Regexp*> Elem;
|
|
|
|
RE2::Options options_;
|
|
RE2::Anchor anchor_;
|
|
std::vector<Elem> elem_;
|
|
bool compiled_;
|
|
int size_;
|
|
std::unique_ptr<re2::Prog> prog_;
|
|
};
|
|
|
|
} // namespace re2
|
|
|
|
#endif // RE2_SET_H_
|