SMBIOS Library
TokenTableIterator.cpp
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1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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3  *
4  * Copyright (C) 2005 Dell Inc.
5  * by Michael Brown <Michael_E_Brown@dell.com>
6  * Licensed under the Open Software License version 2.1
7  *
8  * Alternatively, you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published
10  * by the Free Software Foundation; either version 2 of the License,
11  * or (at your option) any later version.
12 
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16  * See the GNU General Public License for more details.
17  */
18 
19 #define LIBSMBIOS_SOURCE
20 #include "TokenImpl.h"
21 
22 using namespace std;
23 
24 namespace smbios
25 {
26  ConstTokenTableIterator::ConstTokenTableIterator (const ITokenTable * initialTable, int typeToMatch)
27  : TokenTableIteratorBase( initialTable, typeToMatch )
28  {}
29 
30  TokenTableIterator::TokenTableIterator (const ITokenTable *initialTable, int typeToMatch)
31  : TokenTableIteratorBase( initialTable, typeToMatch )
32  {}
33 
34 
35  TokenTableIteratorBase::TokenTableIteratorBase (const ITokenTable *initialTable, int typeToMatch)
36  :matchType(typeToMatch), table(initialTable), current(-1)
37  {
38  if( table == 0 )
39  current = -2;
40 
42  }
43 
45  {
46  current=0;
48  }
49 
51  {
52  return (current < 0);
53  }
54 
56  {
57  return *(const_cast<TokenTableIterator *>(this)->dereference());
58  }
59 
61  {
62  return const_cast<TokenTableIterator *>(this)->dereference();
63  }
64 
66  {
67  return *dereference();
68  }
69 
71  {
72  return dereference();
73  }
74 
75 
77  {
78  return const_cast<TokenTableIteratorBase *>(this)->dereference();
79  }
80 
82  {
83  const TokenTable *CTTable = dynamic_cast<const TokenTable *>(table);
84  if( current >= 0 && static_cast<unsigned int>(current) >= CTTable->tokenList.size() )
85  current = -2; // should _never_ get here.
86  if( current > -1 )
87  {
88  return CTTable->tokenList[current] ;
89  }
90  throw DerefNullPointerImpl("tried to dereference non-existent token");
91  }
92 
94  {
95  if( current == -2 )
96  return;
97 
98  const TokenTable *CTTable = dynamic_cast<const TokenTable *>(table);
99  size_t size = CTTable->tokenList.size();
100  do
101  {
102  ++current;
103  }
104  while(
105  matchType != -1 &&
106  current >= 0 &&
107  static_cast<unsigned int>(current) < size &&
108  CTTable->tokenList[current]->getType() != static_cast<u32>(matchType)
109  );
110 
111  // don't overflow the size of the table.
112  // be careful about signed vs unsigned comparisons.
113  if( current >= 0 && static_cast<unsigned int>(current) >= size )
114  current = -2;
115 
116  return;
117  }
118 
119  //Prefix ++
121  {
122  if( current > -1 )
124  return *this;
125  }
126 
127  //Postfix ++
129  {
130  const TokenTableIterator oldValue = *this;
131  ++(*this);
132  return oldValue;
133  }
134 
135  //Prefix ++
137  {
138  if( current > -1 )
140  return *this;
141  }
142 
143  //Postfix ++
145  {
146  const ConstTokenTableIterator oldValue = *this;
147  ++(*this);
148  return oldValue;
149  }
150 
151 }