cline.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");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *----------------------------------------------------------------------------
 * Concesso in licenza secondo i termini della Licenza Apache, versione 2.0
 * (la "Licenza"); è proibito usare questo file se non in conformità alla
 * Licenza. Una copia della Licenza è disponibile all'indirizzo:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Se non richiesto dalla legislazione vigente o concordato per iscritto,
 * il software distribuito nei termini della Licenza è distribuito
 * "COSÌ COM'È", SENZA GARANZIE O CONDIZIONI DI ALCUN TIPO, esplicite o
 * implicite. Consultare la Licenza per il testo specifico che regola le
 * autorizzazioni e le limitazioni previste dalla medesima.
 ****************************************************************************/
 
/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/
 
void cline( Environment * _environment, char * _characters ) {
 
    Variable * space = variable_temporary( _environment, VT_CHAR, "(space)");
    variable_store( _environment, space->name, 32 );
    
    memorize(_environment);
    Variable * characters = NULL;
    if ( _characters ) {
        characters = variable_retrieve( _environment, _characters );
    } else {
        characters = variable_temporary( _environment, VT_BYTE, "(characters)" );
        cpu_move_8bit( _environment, "CONSOLEW", characters->realName );
        cpu_math_add_8bit( _environment, characters->realName, "CONSOLEX1", characters->realName );
        cpu_math_sub_8bit( _environment, characters->realName, "XCURSYS", characters->realName );
    }
    MAKE_LABEL
    cpu_label( _environment, label );
    print( _environment, space->name, 0, _environment->printRaw );
    cpu_dec( _environment, characters->realName );
    cpu_compare_and_branch_8bit_const( _environment, characters->realName, 0, label, 0 );
    remember(_environment);
 
}