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1 | // Created on: 1992-05-14 |
2 | // Created by: NW,JPB,CAL |
3 | // Copyright (c) 1992-1999 Matra Datavision |
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4 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
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5 | // |
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6 | // This file is part of Open CASCADE Technology software library. |
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7 | // |
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8 | // This library is free software; you can redistribute it and/or modify it under |
9 | // the terms of the GNU Lesser General Public License version 2.1 as published |
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10 | // by the Free Software Foundation, with special exception defined in the file |
11 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
12 | // distribution for complete text of the license and disclaimer of any warranty. |
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13 | // |
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14 | // Alternatively, this file may be used under the terms of Open CASCADE |
15 | // commercial license or contractual agreement. |
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16 | |
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17 | |
18 | #include <Aspect_GenId.hxx> |
19 | #include <Aspect_IdentDefinitionError.hxx> |
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20 | |
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21 | // ======================================================================= |
22 | // function : Aspect_GenId |
23 | // purpose : |
24 | // ======================================================================= |
25 | Aspect_GenId::Aspect_GenId() |
26 | : myFreeCount (INT_MAX / 2 + 1), |
27 | myLength (INT_MAX / 2 + 1), |
28 | myLowerBound (0), |
29 | myUpperBound (INT_MAX / 2) |
30 | { |
31 | // |
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32 | } |
33 | |
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34 | // ======================================================================= |
35 | // function : Aspect_GenId |
36 | // purpose : |
37 | // ======================================================================= |
38 | Aspect_GenId::Aspect_GenId (const Standard_Integer theLow, |
39 | const Standard_Integer theUpper) |
40 | : myFreeCount (theUpper - theLow + 1), |
41 | myLength (theUpper - theLow + 1), |
42 | myLowerBound (theLow), |
43 | myUpperBound (theUpper) |
44 | { |
45 | if (theLow > theUpper) |
46 | { |
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47 | throw Aspect_IdentDefinitionError("GenId Create Error: wrong interval"); |
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48 | } |
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49 | } |
50 | |
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51 | // ======================================================================= |
52 | // function : Free |
53 | // purpose : |
54 | // ======================================================================= |
55 | void Aspect_GenId::Free() |
56 | { |
57 | myFreeCount = myLength; |
58 | myFreeIds.Clear(); |
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59 | } |
60 | |
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61 | // ======================================================================= |
62 | // function : Free |
63 | // purpose : |
64 | // ======================================================================= |
65 | void Aspect_GenId::Free (const Standard_Integer theId) |
66 | { |
67 | if (theId >= myLowerBound |
68 | && theId <= myUpperBound) |
69 | { |
70 | if (myFreeCount + myFreeIds.Extent() + 1 == myLength) |
71 | { |
72 | myFreeCount = myLength; |
73 | myFreeIds.Clear(); |
74 | } |
75 | else |
76 | { |
77 | myFreeIds.Prepend (theId); |
78 | } |
79 | } |
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80 | } |
81 | |
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82 | // ======================================================================= |
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83 | // function : Next |
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84 | // purpose : |
85 | // ======================================================================= |
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86 | Standard_Integer Aspect_GenId::Next() |
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87 | { |
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88 | Standard_Integer aNewId = 0; |
89 | if (!Next (aNewId)) |
90 | { |
91 | throw Aspect_IdentDefinitionError("Aspect_GenId::Next(), Error: Available == 0"); |
92 | } |
93 | return aNewId; |
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94 | } |
95 | |
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96 | // ======================================================================= |
97 | // function : Next |
98 | // purpose : |
99 | // ======================================================================= |
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100 | Standard_Boolean Aspect_GenId::Next (Standard_Integer& theId) |
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101 | { |
102 | if (!myFreeIds.IsEmpty()) |
103 | { |
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104 | theId = myFreeIds.First(); |
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105 | myFreeIds.RemoveFirst(); |
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106 | return Standard_True; |
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107 | } |
108 | else if (myFreeCount < 1) |
109 | { |
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110 | return Standard_False; |
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111 | } |
112 | |
113 | --myFreeCount; |
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114 | theId = myLowerBound + myLength - myFreeCount - 1; |
115 | return Standard_True; |
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116 | } |