/*
 * Override printf, puts, putchar
 */

JNIEnv* jniEnv;

void callOutputText(const char* text) {
    JNIEnv *env = jniEnv;

    jstring javaMsg = (*env)->NewStringUTF(env, text);
    (*env)->CallVoidMethod(env, activityObj, outputTextId, javaMsg);
    (*env)->DeleteLocalRef(env, javaMsg);
}

int printf(const char * format, ... )
{
    char buff[256] = {};

    va_list args;
    va_start (args, format);
    const int result = vsnprintf(buff, sizeof(buff), format, args);
    va_end (args);

    if (result > 0) {
        callOutputText(buff);
    }
    return result;
}

int puts(const char *s)
{
    callOutputText(s);
    callOutputText("\n");
    return strlen(s);
}

int putchar(int c)
{
    char buff[2] = { c, '\0' };
    callOutputText(buff);
    return c;
}