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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 | { |
47 | Aspect_IdentDefinitionError::Raise ("GenId Create Error: wrong interval"); |
48 | } |
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49 | } |
50 | |
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51 | // ======================================================================= |
52 | // function : HasFree |
53 | // purpose : |
54 | // ======================================================================= |
55 | Standard_Boolean Aspect_GenId::HasFree() const |
56 | { |
57 | return myFreeCount > 0 |
58 | || myFreeIds.Extent() > 0; |
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59 | } |
60 | |
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61 | // ======================================================================= |
62 | // function : Available |
63 | // purpose : |
64 | // ======================================================================= |
65 | Standard_Integer Aspect_GenId::Available() const |
66 | { |
67 | return myFreeCount + myFreeIds.Extent(); |
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68 | } |
69 | |
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70 | // ======================================================================= |
71 | // function : Free |
72 | // purpose : |
73 | // ======================================================================= |
74 | void Aspect_GenId::Free() |
75 | { |
76 | myFreeCount = myLength; |
77 | myFreeIds.Clear(); |
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78 | } |
79 | |
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80 | // ======================================================================= |
81 | // function : Free |
82 | // purpose : |
83 | // ======================================================================= |
84 | void Aspect_GenId::Free (const Standard_Integer theId) |
85 | { |
86 | if (theId >= myLowerBound |
87 | && theId <= myUpperBound) |
88 | { |
89 | if (myFreeCount + myFreeIds.Extent() + 1 == myLength) |
90 | { |
91 | myFreeCount = myLength; |
92 | myFreeIds.Clear(); |
93 | } |
94 | else |
95 | { |
96 | myFreeIds.Prepend (theId); |
97 | } |
98 | } |
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99 | } |
100 | |
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101 | // ======================================================================= |
102 | // function : Lower |
103 | // purpose : |
104 | // ======================================================================= |
105 | Standard_Integer Aspect_GenId::Lower() const |
106 | { |
107 | return myLowerBound; |
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108 | } |
109 | |
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110 | // ======================================================================= |
111 | // function : Next |
112 | // purpose : |
113 | // ======================================================================= |
114 | Standard_Integer Aspect_GenId::Next() |
115 | { |
116 | if (!myFreeIds.IsEmpty()) |
117 | { |
118 | const Standard_Integer anId = myFreeIds.First(); |
119 | myFreeIds.RemoveFirst(); |
120 | return anId; |
121 | } |
122 | else if (myFreeCount < 1) |
123 | { |
124 | Aspect_IdentDefinitionError::Raise ("GenId Next Error: Available == 0"); |
125 | } |
126 | |
127 | --myFreeCount; |
128 | const Standard_Integer anId = myLowerBound + myLength - myFreeCount - 1; |
129 | return anId; |
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130 | } |
131 | |
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132 | // ======================================================================= |
133 | // function : Upper |
134 | // purpose : |
135 | // ======================================================================= |
136 | Standard_Integer Aspect_GenId::Upper() const |
137 | { |
138 | return myUpperBound; |
139 | } |