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// Copyright 2011 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// A simple interpreter for the Irregexp byte code.
#ifndef V8_REGEXP_REGEXP_INTERPRETER_H_
#define V8_REGEXP_REGEXP_INTERPRETER_H_
#include "irregexp/imported/regexp.h"
namespace v8 {
namespace internal {
class TrustedByteArray;
class V8_EXPORT_PRIVATE IrregexpInterpreter : public AllStatic {
public:
enum Result {
FAILURE = RegExp::kInternalRegExpFailure,
SUCCESS = RegExp::kInternalRegExpSuccess,
EXCEPTION = RegExp::kInternalRegExpException,
RETRY = RegExp::kInternalRegExpRetry,
FALLBACK_TO_EXPERIMENTAL = RegExp::kInternalRegExpFallbackToExperimental,
};
// In case a StackOverflow occurs, a StackOverflowException is created and
// EXCEPTION is returned.
static int MatchForCallFromRuntime(Isolate* isolate,
DirectHandle<IrRegExpData> regexp_data,
DirectHandle<String> subject_string,
int* output_registers,
int output_register_count,
int start_position);
// In case a StackOverflow occurs, EXCEPTION is returned. The caller is
// responsible for creating the exception.
//
// RETRY is returned if a retry through the runtime is needed (e.g. when
// interrupts have been scheduled or the regexp is marked for tier-up).
//
// Arguments input_start and input_end are unused. They are only passed to
// match the signature of the native irregex code.
//
// Arguments output_registers and output_register_count describe the results
// array, which will contain register values of all captures if one or more
// matches were found. In this case, the return value is the number of
// matches. For all other return codes, the results array remains unmodified.
static int MatchForCallFromJs(Address subject, int32_t start_position,
Address input_start, Address input_end,
int* output_registers,
int32_t output_register_count,
RegExp::CallOrigin call_origin,
Isolate* isolate, Address regexp_data);
static Result MatchInternal(Isolate* isolate,
Tagged<TrustedByteArray>* code_array,
Tagged<String>* subject_string,
int* output_registers, int output_register_count,
int total_register_count, int start_position,
RegExp::CallOrigin call_origin,
uint32_t backtrack_limit);
private:
static int Match(Isolate* isolate, Tagged<IrRegExpData> regexp_data,
Tagged<String> subject_string, int* output_registers,
int output_register_count, int start_position,
RegExp::CallOrigin call_origin);
};
} // namespace internal
} // namespace v8
#endif // V8_REGEXP_REGEXP_INTERPRETER_H_