memorize.c

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/*****************************************************************************
 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers        *
 *****************************************************************************
 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
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/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/
 
/* <usermanual>
@keyword MEMORIZE
 
@english
The ''MEMORIZE'' command allows you to store the current position of the cursor, 
in terms of coordinates, relative to the current console. The cursor coordinates
can be restored with the ''REMEMBER'' command. Note that the two commands operate on 
the current console. If there are no consoles defined, using this method implicitly 
defines ''CONSOLE 0'' as the entire screen.
 
@italian
Il comando ''MEMORIZE'' permette di memorizzare l'attuale posizione del cursore, 
in termini di coordinate, relativo alla console attuale. Le coordinate del cursorse
possono essere ripristinate con il comando ''REMEMBER''. Da notare che i due comandi
operano sulla console attuale. Se non vi sono console definite, usare questo metodo
definisce in modo implicito la ''CONSOLE 0''.
 
@syntax MEMORIZE
 
@example MEMORIZE
 
@usedInExample texts_tracking_02.bas
 
@seeAlso REMEMBER
</usermanual> */
 
void memorize( Environment * _environment ) {
 
    MAKE_LABEL
 
    deploy_begin( memorize );
 
        char doNothingLabel2[MAX_TEMPORARY_STORAGE];
        sprintf( doNothingLabel2, "%sdonothing", label );
        
        cpu_compare_and_branch_8bit_const( _environment, "CONSOLEID", 0xff, doNothingLabel2, 0 );
        // console( _environment, 0, 0, _environment->screenTilesWidth - 1, _environment->screenTilesHeight - 1 );
        // console_save( _environment, 0 );
        cpu_store_8bit( _environment, "CONSOLEID", 0 );
        cpu_label( _environment, doNothingLabel2 );
 
        Variable * xcursys = variable_retrieve( _environment, "XCURSYS" );
        Variable * ycursys = variable_retrieve( _environment, "YCURSYS" );
 
        Variable * address = variable_temporary( _environment, VT_ADDRESS, "(consoles)" );
        cpu_addressof_16bit( _environment, "CONSOLES2", address->realName  );
 
        Variable * displacement = variable_temporary( _environment, VT_BYTE, "(displacement)" );
 
        cpu_move_8bit( _environment, "CONSOLEID", displacement->realName );
        cpu_math_mul2_const_8bit( _environment, displacement->realName, 1, 0 );
        cpu_math_add_16bit_with_8bit( _environment, address->realName, displacement->realName, address->realName );
 
        cpu_move_8bit_indirect( _environment, xcursys->realName, address->realName );
        cpu_inc_16bit( _environment, address->realName );
        cpu_move_8bit_indirect( _environment, ycursys->realName, address->realName );
 
        cpu_return( _environment ); 
 
    deploy_end( memorize );
 
    cpu_call( _environment, "lib_memorize");
 
}