ugBASIC 1.18
An isomorphic BASIC language compiler for retrocomputers
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range.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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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
41extern char DATATYPE_AS_STRING[][16];
42
49/* <usermanual>
50@keyword RANGE
51
52@english
53
54The ''RANGE'' function allows you to know if the ''value'' of a variable is within the range
55given by the ''min'' and ''max'' extremes. Note that the extremes are included.
56
57@italian
58
59La funzione ''RANGE'' consente di sapere se il valore (''value'') di una variabile è all'interno
60dell'intervallo dato dagli estremi ''min'' e ''max''. Da notare che gli estremi sono compresi.
61
62@syntax = RANGE(value,min,max)
63
64@example IF RANGE(v,0,100) THEN: PRINT "Value is between 0 and 100.": ENDIF
65
66@target all
67@verified
68</usermanual> */
69
70Variable * range( Environment * _environment, char * _expression, char * _min, char * _max ) {
71
72 Variable * expression = variable_retrieve( _environment, _expression );
73 Variable * min = variable_retrieve_or_define( _environment, _min, expression->type, 0 );
74 Variable * max = variable_retrieve_or_define( _environment, _max, expression->type, 0 );
75
76 return variable_and(
77 _environment,
78 variable_greater_than( _environment, expression->name, min->name, 1 )->name,
79 variable_less_than( _environment, expression->name, max->name, 1 )->name );
80
81}
82
Variable * variable_retrieve(Environment *_environment, char *_name)
Variable * variable_retrieve_or_define(Environment *_environment, char *_name, VariableType _type, int _value)
Variable * variable_less_than(Environment *_environment, char *_source, char *_destination, int _equal)
Compare two variable and return the result of comparation.
Variable * variable_and(Environment *_environment, char *_left, char *_right)
Calculate logical "and" and return it as the result.
Variable * variable_greater_than(Environment *_environment, char *_source, char *_destination, int _equal)
Compare two variable and return the result of comparation.
Variable * range(Environment *_environment, char *_expression, char *_min, char *_max)
Emit code for READ instruction.
Definition range.c:70
char * name
Definition ugbc.h:979
VariableType type
Definition ugbc.h:988
struct _Variable Variable
Structure of a single variable.
struct _Environment Environment
Structure of compilation environment.
char DATATYPE_AS_STRING[][16]