Ads

 1 /******************************************************************************
 2 *
 3 * Copyright (C) 2006, The Gentee Group. All rights reserved. 
 4 * This file is part of the Gentee open source project - http://www.gentee.com. 
 5 * 
 6 * THIS FILE IS PROVIDED UNDER THE TERMS OF THE GENTEE LICENSE ("AGREEMENT"). 
 7 * ANY USE, REPRODUCTION OR DISTRIBUTION OF THIS FILE CONSTITUTES RECIPIENTS 
 8 * ACCEPTANCE OF THE AGREEMENT.
 9 *
10 * ID: num32 20.11.06 0.0.A.
11 *
12 * Author: Alexey Krivonogov ( gentee )
13 *
14 * Summary: 32-based numbers.
15 *
16 ******************************************************************************/
17 
18 private
19 
20 global 
21 {
22    collection  letters = %{ '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 
23                             'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L',
24                             'M', 'N', 'P', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 
25                             'Y', 'Z' }
26    arr  num2key key2num
27 }
28 
29 public
30 
31 func  str32x_init< entry >
32 {
33    uint i val
34    
35    key2num.expand( 256 )
36    fornum i, 32
37    {
38       val = letters.val( i )     
39       num2key += val
40       key2num[ val ] = i
41    }
42 }
43 
44 method  uint str.str32x2uint
45 {
46    uint result i
47       
48    fornum i, *this
49    {
50       result <<= 5 // Сдвиг на 5 бит
51       result += key2num[ this[ i ]]      
52    }    
53    return result
54 }
55 
56 method  str str.uint2str32x( uint val )
57 {
58    uint  i
59       
60    this.clear()
61    while val
62    {
63       this.insert( 0, "".appendch( num2key[ val & 31 ] ))
64       val >>= 5 // Сдвиг на 5 бит
65    }
66    if !*this : this.appendch( num2key[0] )
67        
68    return this
69 }