minecraft-pi-reborn/mods/src/misc/misc.cpp

#include <string>
#include <fstream>
#include <streambuf>

#include <cstring>

#include <libreborn/libreborn.h>

#include "../feature/feature.h"
#include "misc.h"

#include <libreborn/minecraft.h>

// Read Asset File
static AppPlatform_readAssetFile_return_value AppPlatform_readAssetFile_injection(__attribute__((unused)) unsigned char *app_platform, std::string const& path) {
    // Read File
    std::string full_path("./data/");
    full_path.append(path);
    std::ifstream stream(full_path);
    std::string str((std::istreambuf_iterator<char>(stream)), std::istreambuf_iterator<char>());
    // Return String
    AppPlatform_readAssetFile_return_value ret;
    ret.length = str.length();
    ret.data = strdup(str.c_str());
    return ret;
}

// Add Item To Inventory
static void inventory_add_item(unsigned char *inventory, unsigned char *item, bool is_tile) {
    unsigned char *item_instance = (unsigned char *) ::operator new(ITEM_INSTANCE_SIZE);
    ALLOC_CHECK(item_instance);
    item_instance = (*(is_tile ? ItemInstance_constructor_tile : ItemInstance_constructor_item))(item_instance, item);
    (*FillingContainer_addItem)(inventory, item_instance);
}

// Expand Creative Inventory
static int32_t Inventory_setupDefault_FillingContainer_addItem_call_injection(unsigned char *filling_container, unsigned char *item_instance) {
    // Call Original
    int32_t ret = (*FillingContainer_addItem)(filling_container, item_instance);

    // Add Items
    inventory_add_item(filling_container, *Item_flintAndSteel, false);
    inventory_add_item(filling_container, *Item_snowball, false);
    inventory_add_item(filling_container, *Item_egg, false);
    inventory_add_item(filling_container, *Item_shears, false);
    for (int i = 0; i < 16; i++) {
        if (i == 15) {
            // Bonemeal Is Already In The Creative Inventory
            continue;
        }
        unsigned char *item_instance = (unsigned char *) ::operator new(ITEM_INSTANCE_SIZE);
        ALLOC_CHECK(item_instance);
        item_instance = (*ItemInstance_constructor_item_extra)(item_instance, *Item_dye_powder, 1, i);
        (*FillingContainer_addItem)(filling_container, item_instance);
    }
    inventory_add_item(filling_container, *Item_camera, false);
    // Add Tiles
    inventory_add_item(filling_container, *Tile_water, true);
    inventory_add_item(filling_container, *Tile_lava, true);
    inventory_add_item(filling_container, *Tile_calmWater, true);
    inventory_add_item(filling_container, *Tile_calmLava, true);
    inventory_add_item(filling_container, *Tile_glowingObsidian, true);
    inventory_add_item(filling_container, *Tile_web, true);
    inventory_add_item(filling_container, *Tile_topSnow, true);
    inventory_add_item(filling_container, *Tile_ice, true);
    inventory_add_item(filling_container, *Tile_invisible_bedrock, true);

    return ret;
}

// Print Chat To Log
static bool Gui_addMessage_recursing = false;
static void Gui_addMessage_injection(unsigned char *gui, std::string const& text) {
    // Sanitize Message
    char *new_message = strdup(text.c_str());
    ALLOC_CHECK(new_message);
    sanitize_string(&new_message, -1, 1);

    // Process Message
    if (!Gui_addMessage_recursing) {
        // Start Recursing
        Gui_addMessage_recursing = true;

        // Print Log Message
        fprintf(stderr, "[CHAT]: %s\n", new_message);

        // Call Original Method
        (*Gui_addMessage)(gui, std::string(new_message));

        // End Recursing
        Gui_addMessage_recursing = false;
    } else {
        // Call Original Method
        (*Gui_addMessage)(gui, std::string(new_message));
    }

    // Free
    free(new_message);
}

// Init
void _init_misc_cpp() {
    // Implement AppPlatform::readAssetFile So Translations Work
    overwrite((void *) AppPlatform_readAssetFile, (void *) AppPlatform_readAssetFile_injection);

    if (feature_has("Expand Creative Inventory")) {
        // Add Extra Items To Creative Inventory (Only Replace Specific Function Call)
        overwrite_call((void *) 0x8e0fc, (void *) Inventory_setupDefault_FillingContainer_addItem_call_injection);
    }

    // Print Chat To Log
    overwrite_calls((void *) Gui_addMessage, (void *) Gui_addMessage_injection);
}