// Copyright 2020 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. #include "src/regexp/experimental/experimental-bytecode.h" #include <cctype> #include <iomanip> namespace v8 { namespace internal { namespace { std::ostream& PrintAsciiOrHex(std::ostream& os, base::uc16 c) { if (c < 128 && std::isprint(c)) { os << static_cast<char>(c); } else { os << "0x" << std::hex << static_cast<int>(c); } return os; } } // namespace std::ostream& operator<<(std::ostream& os, const RegExpInstruction& inst) { switch (inst.opcode) { case RegExpInstruction::CONSUME_RANGE: { os << "CONSUME_RANGE ["; PrintAsciiOrHex(os, inst.payload.consume_range.min); os << ", "; PrintAsciiOrHex(os, inst.payload.consume_range.max); os << "]"; break; } case RegExpInstruction::ASSERTION: os << "ASSERTION "; switch (inst.payload.assertion_type) { case RegExpAssertion::Type::START_OF_INPUT: os << "START_OF_INPUT"; break; case RegExpAssertion::Type::END_OF_INPUT: os << "END_OF_INPUT"; break; case RegExpAssertion::Type::START_OF_LINE: os << "START_OF_LINE"; break; case RegExpAssertion::Type::END_OF_LINE: os << "END_OF_LINE"; break; case RegExpAssertion::Type::BOUNDARY: os << "BOUNDARY"; break; case RegExpAssertion::Type::NON_BOUNDARY: os << "NON_BOUNDARY"; break; } break; case RegExpInstruction::FORK: os << "FORK " << inst.payload.pc; break; case RegExpInstruction::JMP: os << "JMP " << inst.payload.pc; break; case RegExpInstruction::ACCEPT: os << "ACCEPT"; break; case RegExpInstruction::SET_REGISTER_TO_CP: os << "SET_REGISTER_TO_CP " << inst.payload.register_index; break; case RegExpInstruction::CLEAR_REGISTER: os << "CLEAR_REGISTER " << inst.payload.register_index; break; } return os; } namespace { // The maximum number of digits required to display a non-negative number < n // in base 10. int DigitsRequiredBelow(int n) { DCHECK_GE(n, 0); int result = 1; for (int i = 10; i < n; i *= 10) { result += 1; } return result; } } // namespace std::ostream& operator<<(std::ostream& os, base::Vector<const RegExpInstruction> insts) { int inst_num = insts.length(); int line_digit_num = DigitsRequiredBelow(inst_num); for (int i = 0; i != inst_num; ++i) { const RegExpInstruction& inst = insts[i]; os << std::setfill('0') << std::setw(line_digit_num) << i << ": " << inst << std::endl; } return os; } } // namespace internal } // namespace v8