calcbrain source code

1 module calcbrain;
2 
3 import bindbc.cocoa;
4 import core.stdc.stdio;
5 
6 import core.stdc.math : pow, sqrt, ceil;
7 
8 import calcface;
9 
10 CalcFace face;
11 double result = 0.0;
12 double enteredNumber = 0.0;
13 NSInteger op = none;
14 int fractionalDigits;
15 BOOL decSep = NO;
16 BOOL editing = YES;
17 
18 // Set the corresponding face
19 void setFace(ref CalcFace aFace){
20     face = aFace;
21     face.setDisplayedNumber(enteredNumber, decSep, fractionalDigits);
22 }
23 
24 // Jump here on calculation errors
25 void error(){
26   result = 0;
27   enteredNumber = 0;
28   op = none;
29   fractionalDigits = 0;
30   decSep = NO;
31   editing = YES;
32   face.setError();
33 }
34 
35 //extern (C):
36 // The various buttons 
37 void clear(id sender, SEL sel, ...){
38   result = 0;
39   enteredNumber = 0;
40   op = none;
41   fractionalDigits = 0;
42   decSep = NO;
43   editing = YES;
44   face.setDisplayedNumber(0, NO, 0);
45 }
46 
47 void equal(id sender){
48   switch (op)
49     {
50     case none: 
51       result = enteredNumber;
52       enteredNumber = 0;
53       decSep = NO;
54       fractionalDigits = 0;
55       return;
56     case addition:
57       result = result + enteredNumber;
58       break;
59     case subtraction:
60       result = result - enteredNumber;
61       break;
62     case multiplication:
63       result = result * enteredNumber;
64       break;
65     case division:
66       if (enteredNumber == 0)
67       {
68         error();
69         return;
70       }
71       else 
72 	      result = result / enteredNumber;
73         break;
74       default: assert(0);
75     }
76   face.setDisplayedNumber(result,	(ceil(result) != result), 7);
77   enteredNumber = result;
78   op = none;
79   editing = NO;
80 }
81 
82 void digit(id sender, SEL sel, ...){
83     import std.conv;
84     import std.stdio;
85     //writefln("You clicked the button with tag `%s`", NSButton(sender).tag);
86     if (!editing)
87     {
88       enteredNumber = 0;
89       decSep = NO;
90       fractionalDigits = 0;
91       editing = YES;
92     }
93     if(decSep){
94         enteredNumber = enteredNumber + NSButton(sender).tag * pow (0.1, 1+fractionalDigits);
95         fractionalDigits++;
96     }else{
97         enteredNumber = enteredNumber * 10 + NSButton(sender).tag;
98         if (enteredNumber > pow (10, 15)){
99             error();
100             return;
101         }
102     }
103     face.setDisplayedNumber(enteredNumber, decSep, fractionalDigits);
104 }
105 
106 void decimalSeparator(id sender){
107     if (!editing)
108     {
109       enteredNumber = 0;
110       decSep = NO;
111       fractionalDigits = 0;
112       editing = YES;
113     }
114     if (!decSep)
115     {
116       decSep = YES;
117       face.setDisplayedNumber(enteredNumber, YES, 0);
118     }
119 }
120 
121 void operation(id sender, SEL sel, ...){
122     if (op == none)
123     {
124       result = enteredNumber;
125       enteredNumber = 0;
126       decSep = NO;
127       fractionalDigits = 0;
128       op = NSButton(sender).tag;
129       
130     }
131   else // operation
132     {	 
133       equal(null);
134       operation(sender, null);
135     }
136     
137 }
138 
139 void squareRoot(id sender, SEL sel, ...){
140   if (op == none)
141     {
142       result = sqrt (enteredNumber);
143       face.setDisplayedNumber(result, (ceil(result) != result ? YES : NO), 7);
144       enteredNumber = result;
145       editing = NO;
146       op = none;  
147     }
148   else // operation
149     {	 
150       equal(null);
151       squareRoot(sender, null);
152     }
153 }