create_vector.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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/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/

/* <usermanual>
@keyword CREATE VECTOR
 
@english 
 
This command allows you to generate a ''VECTOR'' variable, i.e.
a datatype that represents a two-dimensional geometric vector.
 
@italian
 
Questo comando consente di generare una variabile di tipo ''VECTOR'',
cioè un tipo di dato che rappresenta un vettore geometrico bidimensionale.
 
@syntax = CREATE VECTOR( x0, y0 )
 
@example DIM p AS VECTOR
@example    v = CREATE VECTOR( 10, 10 )
 
</usermanual> */
 
Variable * create_vector( Environment * _environment, char * _x, char * _y ) {
 
    deploy_begin( create_vector );
 
        Variable * vector = variable_define( _environment, "createvector__vector", VT_VECTOR2, 0 );
 
        Variable * x = variable_define( _environment, "createvector__x", VT_POSITION, 0 );
        Variable * y = variable_define( _environment, "createvector__y", VT_POSITION, 0 );
 
        cpu_move_16bit( _environment, x->realName, vector->realName );
        cpu_move_16bit( _environment, y->realName, address_displacement( _environment, vector->realName, "2" ) );
 
        cpu_return( _environment );
 
    deploy_end( create_vector )
 
    Variable * xp = variable_retrieve_or_define( _environment, _x, VT_POSITION, 0 );
    Variable * yp = variable_retrieve_or_define( _environment, _y, VT_POSITION, 0 );
 
    Variable * vector = variable_retrieve( _environment, "createvector__vector" );
 
    Variable * x = variable_retrieve( _environment, "createvector__x" );
    Variable * y = variable_retrieve( _environment, "createvector__y" );
    
    variable_move( _environment, xp->name, x->name );
    variable_move( _environment, yp->name, y->name );
 
    cpu_call( _environment, "lib_create_vector" );
 
    return vector;
 
}