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// 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::START_OF_INPUT:
os << "START_OF_INPUT";
break;
case RegExpAssertion::END_OF_INPUT:
os << "END_OF_INPUT";
break;
case RegExpAssertion::START_OF_LINE:
os << "START_OF_LINE";
break;
case RegExpAssertion::END_OF_LINE:
os << "END_OF_LINE";
break;
case RegExpAssertion::BOUNDARY:
os << "BOUNDARY";
break;
case RegExpAssertion::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
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