randomize.c

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/*****************************************************************************
 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers        *
 *****************************************************************************
 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
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 * Licensed under the Apache License, Version 2.0 (the "License");
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/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/

/* <usermanual>
@keyword RANDOMIZE
 
@english
Initialize the random seed.
 
@italian
Inizializza il seme casuale.
 
@syntax RANDOMIZE seed
 
@example RANDOMIZE
 
@target c128
</usermanual> */
void randomize( Environment * _environment, char * _ext_seed ) {
 
    Variable * seed = variable_retrieve( _environment, "CPURANDOM_SEED" );
 
    if ( _ext_seed ) {
        Variable * external_seed = variable_retrieve( _environment, _ext_seed );
        variable_move( _environment, external_seed->name, seed->name );
    } else {
        variable_store( _environment, seed->name, 0xf0f0f0f0 );
    }
 
    cpu_random_8bit( _environment, NULL, NULL );
 
}