70 lines
2.7 KiB
C++
70 lines
2.7 KiB
C++
#include <string>
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#include <libreborn/libreborn.h>
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#include <libreborn/minecraft.h>
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#include "../init/init.h"
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#include "../feature/feature.h"
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// Death Messages
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static std::string get_death_message(unsigned char *player) {
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// Get Username
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char *username = *(char **) (player + Player_username_property_offset);
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// Prepare Death Message
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std::string message;
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message.append(username);
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message.append(" has died");
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// Return
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return message;
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}
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// Common Death Message Logic
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static void Player_actuallyHurt_injection_helper(unsigned char *player, int32_t damage, bool is_local_player) {
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// Store Old Health
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int32_t old_health = *(int32_t *) (player + Mob_health_property_offset);
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// Call Original Method
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(*(is_local_player ? LocalPlayer_actuallyHurt : Mob_actuallyHurt))(player, damage);
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// Store New Health
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int32_t new_health = *(int32_t *) (player + Mob_health_property_offset);
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// Get Variables
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unsigned char *minecraft = *(unsigned char **) (player + (is_local_player ? LocalPlayer_minecraft_property_offset : ServerPlayer_minecraft_property_offset));
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unsigned char *rak_net_instance = *(unsigned char **) (minecraft + Minecraft_rak_net_instance_property_offset);
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unsigned char *rak_net_instance_vtable = *(unsigned char **) rak_net_instance;
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// Only Run On Server-Side
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RakNetInstance_isServer_t RakNetInstance_isServer = *(RakNetInstance_isServer_t *) (rak_net_instance_vtable + RakNetInstance_isServer_vtable_offset);
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if ((*RakNetInstance_isServer)(rak_net_instance)) {
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// Check Health
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if (new_health < 1 && old_health >= 1) {
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// Get Death Message
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std::string message = get_death_message(player);
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// Post Death Message
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unsigned char *server_side_network_handler = *(unsigned char **) (minecraft + Minecraft_network_handler_property_offset);
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(*ServerSideNetworkHandler_displayGameMessage)(server_side_network_handler, message);
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}
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}
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}
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// ServerPlayer Death Message Logic
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static void ServerPlayer_actuallyHurt_injection(unsigned char *player, int32_t damage) {
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Player_actuallyHurt_injection_helper(player, damage, false);
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}
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// LocalPlayer Death Message Logic
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static void LocalPlayer_actuallyHurt_injection(unsigned char *player, int32_t damage) {
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Player_actuallyHurt_injection_helper(player, damage, true);
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}
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// Init
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void init_death() {
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// Death Messages
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if (feature_has("Implement Death Messages", 1)) {
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patch_address(ServerPlayer_actuallyHurt_vtable_addr, (void *) ServerPlayer_actuallyHurt_injection);
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patch_address(LocalPlayer_actuallyHurt_vtable_addr, (void *) LocalPlayer_actuallyHurt_injection);
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}
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}
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