Diffstat (limited to 'noncore/tools/calc2/instruction.h') (more/less context) (ignore whitespace changes)
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diff --git a/noncore/tools/calc2/instruction.h b/noncore/tools/calc2/instruction.h new file mode 100644 index 0000000..6077bf0 --- a/dev/null +++ b/noncore/tools/calc2/instruction.h | |||
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1 | /********************************************************************** | ||
2 | ** Copyright (C) 2000 Trolltech AS. All rights reserved. | ||
3 | ** | ||
4 | ** This file is part of Qtopia Environment. | ||
5 | ** | ||
6 | ** This file may be distributed and/or modified under the terms of the | ||
7 | ** GNU General Public License version 2 as published by the Free Software | ||
8 | ** Foundation and appearing in the file LICENSE.GPL included in the | ||
9 | ** packaging of this file. | ||
10 | ** | ||
11 | ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE | ||
12 | ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | ||
13 | ** | ||
14 | ** See http://www.trolltech.com/gpl/ for GPL licensing information. | ||
15 | ** | ||
16 | ** Contact info@trolltech.com if any conditions of this licensing are | ||
17 | ** not clear to you. | ||
18 | ** | ||
19 | **********************************************************************/ | ||
20 | #ifndef INSTRUCTION_H | ||
21 | #define INSTRUCTION_H | ||
22 | |||
23 | /* Internal representation of data | ||
24 | The first four types indicate an int, | ||
25 | that is, Data.i, and are incompatible | ||
26 | with the other two types. | ||
27 | |||
28 | - Plugin is responsible for telling engine | ||
29 | which Rep to use at any given time | ||
30 | - Instructions from that plugin only | ||
31 | have to handle that representation | ||
32 | - Engine is responsible for error-checking | ||
33 | according to its current rep and display */ | ||
34 | enum Representation { | ||
35 | rBin, | ||
36 | rOct, | ||
37 | rDec, | ||
38 | rHex, | ||
39 | rDouble, | ||
40 | rFraction | ||
41 | }; | ||
42 | |||
43 | // An atom of data | ||
44 | union Data { | ||
45 | int i; | ||
46 | double dbl; | ||
47 | struct Fraction { | ||
48 | int numerator, denominator; | ||
49 | } fraction; | ||
50 | }; | ||
51 | |||
52 | // Instruction base class | ||
53 | class Instruction { | ||
54 | public: | ||
55 | Instruction (int p = 0) { | ||
56 | precedence = p; | ||
57 | }; | ||
58 | |||
59 | virtual ~ Instruction () {}; | ||
60 | |||
61 | virtual Data eval(Data) = 0; | ||
62 | void setRep(Representation r) { rep = r; }; | ||
63 | |||
64 | Representation rep; | ||
65 | Data acc; | ||
66 | int precedence; | ||
67 | }; | ||
68 | |||
69 | #endif | ||