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

#include <string>

#include <libreborn/libreborn.h>
#include <symbols/minecraft.h>

#include "misc.h"

// 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);
}

// Check If Two Percentages Are Different Enough To Be Logged
#define SIGNIFICANT_PROGRESS 5
static bool is_progress_difference_significant(int32_t new_val, int32_t old_val) {
    if (new_val != old_val) {
        if (new_val == -1 || old_val == -1) {
            return true;
        } else if (new_val == 0 || new_val == 100) {
            return true;
        } else {
            return new_val - old_val >= SIGNIFICANT_PROGRESS;
        }
    } else {
        return false;
    }
}

// Print Progress Reports
static int last_progress = -1;
static const char *last_message = NULL;
static void print_progress(unsigned char *minecraft) {
    const char *message = (*Minecraft_getProgressMessage)(minecraft);
    int32_t progress = *(int32_t *) (minecraft + Minecraft_progress_property_offset);
    if ((*Minecraft_isLevelGenerated)(minecraft)) {
        message = "Ready";
        progress = -1;
    }
    if (message != NULL) {
        bool message_different = message != last_message;
        bool progress_significant = is_progress_difference_significant(progress, last_progress);
        if (message_different || progress_significant) {
            if (progress != -1) {
                INFO("Status: %s: %i%%", message, progress);
            } else {
                INFO("Status: %s", message);
            }
            if (message_different) {
                last_message = message;
            }
            if (progress_significant) {
                last_progress = progress;
            }
        }
    }
}

// Print Progress Reports Regularly
static void Minecraft_update_injection(unsigned char *minecraft) {
    // Print Progress Reports
    print_progress(minecraft);
}

// Log When Game Is Saved
void Level_saveLevelData_injection(unsigned char *level) {
    // Print Log Message
    DEBUG("Saving Game");

    // Call Original Method
    (*Level_saveLevelData)(level);
}

// Init
void _init_misc_logging() {
    // Print Chat To Log
    overwrite_calls((void *) Gui_addMessage, (void *) Gui_addMessage_injection);

    // Print Progress Reports
    misc_run_on_update(Minecraft_update_injection);

    // Print Log On Game Save
    overwrite_calls((void *) Level_saveLevelData, (void *) Level_saveLevelData_injection);
}