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/*
* Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/StringBuilder.h>
#include <LibRegex/RegexMatcher.h>
namespace regex {
class RegexDebug {
public:
RegexDebug(FILE* file = stdout)
: m_file(file)
{
}
virtual ~RegexDebug() = default;
template<typename T>
void print_raw_bytecode(Regex<T>& regex) const
{
auto& bytecode = regex.parser_result.bytecode;
size_t index { 0 };
for (auto& value : bytecode) {
outln(m_file, "OpCode i={:3} [{:#02X}]", index, (u32)value);
++index;
}
}
template<typename T>
void print_bytecode(Regex<T> const& regex) const
{
print_bytecode(regex.parser_result.bytecode);
}
void print_bytecode(ByteCode const& bytecode) const
{
MatchState state;
for (;;) {
auto& opcode = bytecode.get_opcode(state);
print_opcode("PrintBytecode", opcode, state);
out(m_file, "{}", m_debug_stripline);
if (is<OpCode_Exit>(opcode))
break;
state.instruction_position += opcode.size();
}
fflush(m_file);
}
void print_opcode(DeprecatedString const& system, OpCode& opcode, MatchState& state, size_t recursion = 0, bool newline = true) const
{
out(m_file, "{:15} | {:5} | {:9} | {:35} | {:30} | {:20}",
system.characters(),
state.instruction_position,
recursion,
opcode.to_deprecated_string().characters(),
opcode.arguments_string().characters(),
DeprecatedString::formatted("ip: {:3}, sp: {:3}", state.instruction_position, state.string_position));
if (newline)
outln();
if (newline && is<OpCode_Compare>(opcode)) {
for (auto& line : to<OpCode_Compare>(opcode).variable_arguments_to_deprecated_string())
outln(m_file, "{:15} | {:5} | {:9} | {:35} | {:30} | {:20}", "", "", "", "", line, "");
}
}
void print_result(OpCode const& opcode, ByteCode const& bytecode, MatchInput const& input, MatchState& state, ExecutionResult result) const
{
StringBuilder builder;
builder.append(execution_result_name(result));
builder.appendff(", fc: {}, ss: {}", input.fail_counter, input.saved_positions.size());
if (result == ExecutionResult::Succeeded) {
builder.appendff(", ip: {}/{}, sp: {}/{}", state.instruction_position, bytecode.size() - 1, state.string_position, input.view.length() - 1);
} else if (result == ExecutionResult::Fork_PrioHigh) {
builder.appendff(", next ip: {}", state.fork_at_position + opcode.size());
} else if (result != ExecutionResult::Failed) {
builder.appendff(", next ip: {}", state.instruction_position + opcode.size());
}
outln(m_file, " | {:20}", builder.to_deprecated_string());
if (is<OpCode_Compare>(opcode)) {
for (auto& line : to<OpCode_Compare>(opcode).variable_arguments_to_deprecated_string(input)) {
outln(m_file, "{:15} | {:5} | {:9} | {:35} | {:30} | {:20}", "", "", "", "", line, "");
}
}
out(m_file, "{}", m_debug_stripline);
}
void print_header()
{
StringBuilder builder;
builder.appendff("{:15} | {:5} | {:9} | {:35} | {:30} | {:20} | {:20}\n", "System", "Index", "Recursion", "OpCode", "Arguments", "State", "Result");
auto length = builder.length();
for (size_t i = 0; i < length; ++i) {
builder.append('=');
}
auto str = builder.to_deprecated_string();
VERIFY(!str.is_empty());
outln(m_file, "{}", str);
fflush(m_file);
builder.clear();
for (size_t i = 0; i < length; ++i) {
builder.append('-');
}
builder.append('\n');
m_debug_stripline = builder.to_deprecated_string();
}
private:
DeprecatedString m_debug_stripline;
FILE* m_file;
};
}
using regex::RegexDebug;
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