packet generation experiment
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cc6c92a005
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@ -20,4 +20,7 @@ clean:
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run: $(TARGET)
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./$(TARGET)
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.PHONY: all clean run
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packets:
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cd .. && lua generate_packets.lua
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.PHONY: all clean run packets
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198
generate_packets.php
Executable file
198
generate_packets.php
Executable file
@ -0,0 +1,198 @@
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#!/usr/bin/env php
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<?php
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/**
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* Generate packet definitions for C++ client and Go server from packets.json
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*/
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/**
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* Load packet definitions from JSON file
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*/
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function load_packet_definitions($filename = 'packets.json') {
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if (!file_exists($filename)) {
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throw new Exception("Could not open $filename");
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}
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$content = file_get_contents($filename);
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$packets = json_decode($content, true);
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if (json_last_error() !== JSON_ERROR_NONE) {
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throw new Exception("JSON decode error: " . json_last_error_msg());
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}
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return $packets;
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}
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/**
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* Convert PascalCase to SNAKE_CASE
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*/
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function to_snake_case($str) {
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$result = preg_replace('/([A-Z])/', '_$1', $str);
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return strtoupper(ltrim($result, '_'));
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}
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/**
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* Generate C++ header file with packet definitions
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*/
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function generate_cpp_header($packets) {
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$header = <<<CPP
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// Auto-generated packet definitions from packets.json
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// DO NOT EDIT MANUALLY
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#pragma once
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#include <cstdint>
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#include <string>
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CPP;
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// Generate enum
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$header .= "enum class MessageType : uint8_t {\n";
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// Sort keys for consistent output
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$names = array_keys($packets['opcodes']);
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sort($names);
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foreach ($names as $i => $name) {
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$packet = $packets['opcodes'][$name];
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$header .= sprintf(" %s = %s", $name, $packet['id']);
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if ($i < count($names) - 1) {
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$header .= ",";
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}
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$header .= "\n";
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}
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$header .= "};\n\n";
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// Generate packet structures
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$header .= "// Packet structure definitions\n";
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$header .= "namespace Packets {\n\n";
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foreach ($names as $name) {
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$packet = $packets['opcodes'][$name];
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if (!empty($packet['fields'])) {
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$header .= sprintf("struct %s {\n", $name);
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$header .= sprintf(" static constexpr MessageType TYPE = MessageType::%s;\n", $name);
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foreach ($packet['fields'] as $field) {
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$cpp_type = '';
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switch ($field['type']) {
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case 'string':
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$cpp_type = 'std::string';
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break;
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case 'uint8':
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$cpp_type = 'uint8_t';
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break;
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case 'uint32':
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$cpp_type = 'uint32_t';
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break;
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case 'float32':
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$cpp_type = 'float';
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break;
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case 'array':
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$header .= sprintf(" // Array field: %s - requires custom handling\n", $field['name']);
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continue 2;
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}
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$header .= sprintf(" %s %s;\n", $cpp_type, $field['name']);
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}
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$header .= "};\n\n";
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}
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}
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$header .= "} // namespace Packets\n";
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return $header;
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}
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/**
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* Generate Go file with packet definitions
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*/
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function generate_go_file($packets) {
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$go_file = <<<GO
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// Auto-generated packet definitions from packets.json
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// DO NOT EDIT MANUALLY
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package main
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// Message type constants
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const (
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GO;
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$go_file .= "\n";
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// Sort keys for consistent output
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$names = array_keys($packets['opcodes']);
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sort($names);
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// Generate constants
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foreach ($names as $name) {
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$packet = $packets['opcodes'][$name];
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$const_name = 'MSG_' . to_snake_case($name);
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$go_file .= sprintf("\t%s = %s\n", $const_name, $packet['id']);
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}
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$go_file .= ")\n\n";
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// Generate packet structures
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$go_file .= "// Packet structure definitions\n\n";
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foreach ($names as $name) {
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$packet = $packets['opcodes'][$name];
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if (!empty($packet['fields'])) {
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$struct_name = "Packet $name";
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$go_file .= sprintf("type %s struct {\n", $struct_name);
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foreach ($packet['fields'] as $field) {
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$field_name = ucfirst($field['name']);
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$go_type = '';
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switch ($field['type']) {
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case 'string':
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$go_type = 'string';
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break;
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case 'uint8':
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$go_type = 'uint8';
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break;
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case 'uint32':
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$go_type = 'uint32';
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break;
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case 'float32':
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$go_type = 'float32';
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break;
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case 'array':
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$go_file .= sprintf("\t// Array field: %s - requires custom handling\n", $field_name);
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continue 2;
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}
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$go_file .= sprintf("\t%s %s\n", $field_name, $go_type);
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}
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$go_file .= "}\n\n";
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}
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}
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return $go_file;
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}
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try {
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// Load packet definitions
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$packets = load_packet_definitions();
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// Generate C++ header
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$cpp_header = generate_cpp_header($packets);
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$cpp_path = 'client/net/PacketDefinitions.hpp';
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file_put_contents($cpp_path, $cpp_header);
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echo "Generated $cpp_path\n";
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// Generate Go file
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$go_file = generate_go_file($packets);
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$go_path = 'server/packet_definitions.go';
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file_put_contents($go_path, $go_file);
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echo "Generated $go_path\n";
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echo sprintf("Successfully generated packet definitions for protocol version %s\n", $packets['version']);
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} catch (Exception $e) {
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echo "Error: " . $e->getMessage() . "\n";
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exit(1);
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}
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96
packets.json
Normal file
96
packets.json
Normal file
@ -0,0 +1,96 @@
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{
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"version": "1.0.0",
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"opcodes": {
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"Login": {
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"id": "0x01",
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"fields": []
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},
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"Position": {
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"id": "0x02",
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"fields": [
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{"name": "x", "type": "float32"},
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{"name": "y", "type": "float32"},
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{"name": "z", "type": "float32"}
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]
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},
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"Spawn": {
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"id": "0x03",
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"fields": [
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{"name": "playerId", "type": "uint32"},
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{"name": "x", "type": "float32"},
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{"name": "y", "type": "float32"},
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{"name": "z", "type": "float32"},
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{"name": "color", "type": "string"}
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]
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},
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"Move": {
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"id": "0x04",
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"fields": [
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{"name": "playerId", "type": "uint32"},
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{"name": "dx", "type": "float32"},
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{"name": "dy", "type": "float32"},
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{"name": "dz", "type": "float32"}
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]
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},
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"Update": {
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"id": "0x05",
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"fields": [
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{"name": "playerId", "type": "uint32"},
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{"name": "x", "type": "float32"},
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{"name": "y", "type": "float32"},
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{"name": "z", "type": "float32"}
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]
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},
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"PlayerJoined": {
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"id": "0x06",
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"fields": [
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{"name": "playerId", "type": "uint32"},
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{"name": "x", "type": "float32"},
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{"name": "y", "type": "float32"},
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{"name": "z", "type": "float32"},
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{"name": "color", "type": "string"}
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]
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},
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"PlayerLeft": {
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"id": "0x07",
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"fields": [
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{"name": "playerId", "type": "uint32"}
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]
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},
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"PlayerList": {
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"id": "0x08",
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"fields": [
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{"name": "count", "type": "uint8"},
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{"name": "players", "type": "array", "itemType": {
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"fields": [
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{"name": "playerId", "type": "uint32"},
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{"name": "x", "type": "float32"},
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{"name": "y", "type": "float32"},
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{"name": "z", "type": "float32"},
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{"name": "color", "type": "string"}
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]
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}}
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]
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},
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"ChangeColor": {
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"id": "0x09",
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"fields": [
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{"name": "playerId", "type": "uint32"},
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{"name": "color", "type": "string"}
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]
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},
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"ColorChanged": {
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"id": "0x0A",
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"fields": [
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{"name": "playerId", "type": "uint32"},
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{"name": "color", "type": "string"}
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]
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}
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},
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"types": {
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"uint8": {"size": 1, "encoding": "little-endian"},
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"uint32": {"size": 4, "encoding": "little-endian"},
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"float32": {"size": 4, "encoding": "little-endian"},
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"string": {"encoding": "length-prefixed", "lengthType": "uint8"}
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}
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}
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