vector_get_y.c

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/*****************************************************************************
 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers        *
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 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
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/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/
 
/* <usermanual>
@keyword Y
 
@english 
 
This command allows you to retrieve the Y component of a vector, given as input.
 
@italian
 
Questo comando permette di recuperare la componente Y di un vettore, dato in ingresso. 
 
@syntax = Y( vector )
 
@example DIM p AS VECTOR
@example    v = CREATE VECTOR( 42, 21 )
@example    PRINT Y(v) : ' It prints 21
 
</usermanual> */
 
Variable * vector_get_y( Environment * _environment, char * _vector ) {
 
    Variable * vector = variable_retrieve( _environment, _vector );
 
    if ( vector->type != VT_VECTOR2 ) {
        CRITICAL_VECTOR_GET_Y_VECTOR_NEEDED( _vector );
    }
 
    Variable * y = variable_temporary( _environment, VT_POSITION, "(y)" );
    
    cpu_move_16bit( _environment, address_displacement( _environment, vector->realName, "2" ), y->realName );
 
    return y;
 
}