136 lines
4.8 KiB
C
136 lines
4.8 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include <libcore/libcore.h>
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static int32_t get_game_type(__attribute__((unused)) int32_t level_data) {
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return 0;
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}
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static uint32_t can_spawn_mobs(__attribute__((unused)) int32_t obj) {
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return 1;
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}
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#include <SDL/SDL_mouse.h>
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typedef void (*releaseUsingItem_t)(unsigned char *t, unsigned char *player);
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static releaseUsingItem_t survival_releaseUsingItem = (releaseUsingItem_t) 0x1a598;
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static releaseUsingItem_t creative_releaseUsingItem = (releaseUsingItem_t) 0x1b1a0;
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typedef void (*handle_input_t)(unsigned char *, unsigned char *, unsigned char *, unsigned char *);
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static handle_input_t handle_input = (handle_input_t) 0x15ffc;
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static void *handle_input_original = NULL;
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static int is_survival = 0;
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static void handle_input_injection(unsigned char *param_1, unsigned char *param_2, unsigned char *param_3, unsigned char *param_4) {
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// Call Original Method
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revert_overwrite((void *) handle_input, handle_input_original);
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(*handle_input)(param_1, param_2, param_3, param_4);
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revert_overwrite((void *) handle_input, handle_input_original);
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// GameMode Is Offset From param_1 By 0x160
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// Player Is Offset From param_1 By 0x18c
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int using_item = SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_RIGHT);
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if (!using_item) {
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unsigned char *game_mode = *(unsigned char **) (param_1 + 0x160);
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unsigned char *player = *(unsigned char **) (param_1 + 0x18c);
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if (player != NULL && game_mode != NULL) {
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(*(is_survival ? survival_releaseUsingItem : creative_releaseUsingItem))(game_mode, player);
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}
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}
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}
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typedef void (*tickItemDrop_t)(unsigned char *);
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static tickItemDrop_t tickItemDrop = (tickItemDrop_t) 0x27778;
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static void *tickItemDrop_original = NULL;
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#include <SDL/SDL_events.h>
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static void tickItemDrop_injection(unsigned char *this) {
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if (SDL_ShowCursor(SDL_QUERY) == SDL_ENABLE) {
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revert_overwrite((void *) tickItemDrop, tickItemDrop_original);
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(*tickItemDrop)(this);
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revert_overwrite((void *) tickItemDrop, tickItemDrop_original);
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}
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}
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typedef void (*handleClick_t)(unsigned char *, unsigned char *, unsigned char *, unsigned char *);
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static handleClick_t handleClick = (handleClick_t) 0x2599c;
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static void *handleClick_original = NULL;
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static void handleClick_injection(unsigned char *this, unsigned char *param_2, unsigned char *param_3, unsigned char *param_4) {
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if (SDL_ShowCursor(SDL_QUERY) == SDL_ENABLE) {
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revert_overwrite((void *) handleClick, handleClick_original);
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(*handleClick)(this, param_2, param_3, param_4);
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revert_overwrite((void *) handleClick, handleClick_original);
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}
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}
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static int has_feature(const char *name) {
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char *env = getenv("FEATURES");
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char *features = strdup(env != NULL ? env : "");
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char *tok = strtok(features, "|");
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int ret = 0;
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while (tok != NULL) {
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if (strcmp(tok, name) == 0) {
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ret = 1;
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break;
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}
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tok = strtok(NULL, "|");
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}
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free(features);
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fprintf(stderr, "Feature: %s: %s\n", name, ret ? "Enabled" : "Disabled");
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return ret;
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}
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__attribute__((constructor)) static void init() {
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if (has_feature("Touch GUI")) {
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// Use Touch UI
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unsigned char patch_data[4] = {0x01, 0x00, 0x50, 0xe3};
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patch((void *) 0x292fc, patch_data);
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}
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is_survival = has_feature("Survival Mode");
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if (is_survival) {
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// Survival Mode Inventpry UI
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unsigned char patch_data_2[4] = {0x00, 0x30, 0xa0, 0xe3};
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patch((void *) 0x16efc, patch_data_2);
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// Replace Creative Mode VTable With Survival Mode VTable
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patch((void *) 0x1a0d8, (unsigned char *) 0x1b804);
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// Use Correct Size For Survival Mode Object
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unsigned char patch_data_3[4] = {0x24, 0x00, 0xa0, 0xe3};
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patch((void *) 0x1a054, patch_data_3);
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// Force GameType To 0 (Required For Day-Night Cycle)
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overwrite((void *) 0xbabdc, get_game_type);
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}
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// Disable Item Dropping When Cursor Is Hidden
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tickItemDrop_original = overwrite((void *) tickItemDrop, tickItemDrop_injection);
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// Disable Opening Inventory Using The Cursor When Cursor Is Hidden
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handleClick_original = overwrite((void *) handleClick, handleClick_injection);
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if (has_feature("Fix Bow & Arrow")) {
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// Fix Bow
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handle_input_original = overwrite((void *) handle_input, handle_input_injection);
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}
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if (has_feature("Fix Attacking")) {
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// Allow Attacking Mobs
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unsigned char patch_data_5[4] = {0x00, 0xf0, 0x20, 0xe3};
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patch((void *) 0x162d4, patch_data_5);
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}
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if (has_feature("Mob Spawning")) {
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// Enable Mob Spawning
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overwrite((void *) 0xbabec, can_spawn_mobs);
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// Replace CreatorLevel With Level
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unsigned char patch_data_4[4] = {0x96, 0x3d, 0x02, 0xeb};
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patch((void *) 0x16f84, patch_data_4);
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}
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}
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