ugBASIC 1.18
An isomorphic BASIC language compiler for retrocomputers
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tile_class.c
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1/*****************************************************************************
2 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers *
3 *****************************************************************************
4 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
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10 * http://www.apache.org/licenses/LICENSE-2.0
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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22 * http://www.apache.org/licenses/LICENSE-2.0
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30
31/****************************************************************************
32 * INCLUDE SECTION
33 ****************************************************************************/
34
35#include "../../ugbc.h"
36
37/****************************************************************************
38 * CODE SECTION
39 ****************************************************************************/
40
48/* <usermanual>
49@keyword TILE CLASS
50
51@english
52
53This function allows you to know the class to which a certain tile belongs.
54Note that this information is available only at the time of compilation:
55therefore, the parameter with the tile identifier must be a constant.
56
57@italian
58
59Questa funzione permette di conoscere la classe a cui appartiene un determinato
60tile. Da notare che questa è una informazione disponibile unicamente al momento
61della compilazione: pertanto, il parametro con l'identificativo del tile dovrà
62essere una costante.
63
64@syntax = TILE CLASS(tileset, id)
65
66@example tileClass = TILE CLASS(tileset, 29)
67
68@usedInExample tileset_example_02.bas
69
70@target all
71@verified
72</usermanual> */
73Variable * tile_class( Environment * _environment, char * _tileset, int _id ) {
74
75 Variable * tileset = NULL;
76
77 if ( _environment->emptyProcedure ) {
78 tileset = variable_temporary( _environment, VT_TILESET, "(tileset)");
79 return tileset;
80 }
81
82 tileset = variable_retrieve( _environment, _tileset );
83 if ( tileset->type != VT_IMAGES || tileset->originalTileset == NULL ) {
85 }
86
87 if ( _id >= tileset->frameCount ) {
89 }
90
91 TsxTile * actual = tileset->originalTileset->tiles;
92
93 while( actual ) {
94
95 if ( actual->id == _id ) {
96 break;
97 }
98 actual = actual->next;
99 }
100
101 if ( !actual ) {
103 }
104
105 Variable * class = variable_temporary( _environment, VT_STRING, "(class)");
106
107 variable_store_string( _environment, class->name, actual->type );
108
109 return class;
110
111}
Variable * variable_retrieve(Environment *_environment, char *_name)
Variable * variable_store_string(Environment *_environment, char *_destination, char *_value)
Store a string to a variable.
Variable * variable_temporary(Environment *_environment, VariableType _type, char *_meaning)
Define a temporary variable.
int emptyProcedure
Definition ugbc.h:2932
char * type
Definition tsx.h:49
struct _TsxTile * next
Definition tsx.h:52
int id
Definition tsx.h:48
struct _TsxTile * tiles
Definition tsx.h:72
TsxTileset * originalTileset
Definition ugbc.h:1184
VariableType type
Definition ugbc.h:988
int frameCount
Definition ugbc.h:1137
Variable * tile_class(Environment *_environment, char *_tileset, int _id)
Emit code for TILE CLASS(...).
Definition tile_class.c:73
struct _TsxTile TsxTile
struct _Variable Variable
Structure of a single variable.
struct _Environment Environment
Structure of compilation environment.
@ VT_STRING
Definition ugbc.h:474
@ VT_IMAGES
Definition ugbc.h:495
@ VT_TILESET
Definition ugbc.h:510
#define CRITICAL_TILE_CLASS_NO_TILESET(v)
Definition ugbc.h:3645
#define CRITICAL_TILE_CLASS_INVALID_ID(v)
Definition ugbc.h:3646