1 | /* |
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2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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3 | * contributor license agreements. See the NOTICE file distributed with |
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4 | * this work for additional information regarding copyright ownership. |
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5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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6 | * (the "License"); you may not use this file except in compliance with |
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7 | * the License. You may obtain a copy of the License at |
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8 | * |
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9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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10 | * |
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11 | * Unless required by applicable law or agreed to in writing, software |
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12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 | * See the License for the specific language governing permissions and |
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15 | * limitations under the License. |
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16 | */ |
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17 | |
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18 | /* |
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19 | * $Id: NamespaceScope.hpp 568078 2007-08-21 11:43:25Z amassari $ |
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20 | */ |
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21 | |
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22 | #if !defined(NAMESPACESCOPE_HPP) |
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23 | #define NAMESPACESCOPE_HPP |
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24 | |
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25 | #include <xercesc/util/StringPool.hpp> |
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26 | |
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27 | XERCES_CPP_NAMESPACE_BEGIN |
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28 | |
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29 | // |
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30 | // NamespaceScope provides a data structure for mapping namespace prefixes |
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31 | // to their URI's. The mapping accurately reflects the scoping of namespaces |
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32 | // at a particular instant in time. |
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33 | // |
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34 | |
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35 | class VALIDATORS_EXPORT NamespaceScope : public XMemory |
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36 | { |
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37 | public : |
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38 | // ----------------------------------------------------------------------- |
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39 | // Class specific data types |
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40 | // |
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41 | // These really should be private, but some of the compilers we have to |
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42 | // support are too dumb to deal with that. |
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43 | // |
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44 | // PrefMapElem |
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45 | // fURIId is the id of the URI from the validator's URI map. The |
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46 | // fPrefId is the id of the prefix from our own prefix pool. The |
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47 | // namespace stack consists of these elements. |
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48 | // |
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49 | // StackElem |
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50 | // The fMapCapacity is how large fMap has grown so far. fMapCount |
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51 | // is how many of them are valid right now. |
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52 | // ----------------------------------------------------------------------- |
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53 | struct PrefMapElem : public XMemory |
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54 | { |
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55 | unsigned int fPrefId; |
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56 | unsigned int fURIId; |
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57 | }; |
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58 | |
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59 | struct StackElem : public XMemory |
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60 | { |
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61 | PrefMapElem* fMap; |
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62 | unsigned int fMapCapacity; |
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63 | unsigned int fMapCount; |
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64 | }; |
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65 | |
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66 | |
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67 | // ----------------------------------------------------------------------- |
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68 | // Constructors and Destructor |
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69 | // ----------------------------------------------------------------------- |
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70 | NamespaceScope(MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager); |
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71 | ~NamespaceScope(); |
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72 | |
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73 | |
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74 | // ----------------------------------------------------------------------- |
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75 | // Stack access |
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76 | // ----------------------------------------------------------------------- |
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77 | unsigned int increaseDepth(); |
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78 | unsigned int decreaseDepth(); |
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79 | |
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80 | // ----------------------------------------------------------------------- |
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81 | // Prefix map methods |
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82 | // ----------------------------------------------------------------------- |
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83 | void addPrefix(const XMLCh* const prefixToAdd, |
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84 | const unsigned int uriId); |
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85 | |
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86 | unsigned int getNamespaceForPrefix(const XMLCh* const prefixToMap) const; |
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87 | unsigned int getNamespaceForPrefix(const XMLCh* const prefixToMap, |
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88 | const int depthLevel) const; |
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89 | |
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90 | |
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91 | // ----------------------------------------------------------------------- |
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92 | // Miscellaneous methods |
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93 | // ----------------------------------------------------------------------- |
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94 | bool isEmpty() const; |
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95 | void reset(const unsigned int emptyId); |
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96 | |
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97 | |
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98 | private : |
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99 | // ----------------------------------------------------------------------- |
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100 | // Unimplemented constructors and operators |
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101 | // ----------------------------------------------------------------------- |
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102 | NamespaceScope(const NamespaceScope&); |
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103 | NamespaceScope& operator=(const NamespaceScope&); |
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104 | |
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105 | |
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106 | // ----------------------------------------------------------------------- |
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107 | // Private helper methods |
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108 | // ----------------------------------------------------------------------- |
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109 | void expandMap(StackElem* const toExpand); |
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110 | void expandStack(); |
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111 | |
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112 | |
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113 | // ----------------------------------------------------------------------- |
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114 | // Data members |
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115 | // |
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116 | // fEmptyNamespaceId |
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117 | // This is the special URI id for the "" namespace, which is magic |
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118 | // because of the xmlns="" operation. |
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119 | // |
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120 | // fPrefixPool |
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121 | // This is the prefix pool where prefixes are hashed and given unique |
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122 | // ids. These ids are used to track prefixes in the element stack. |
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123 | // |
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124 | // fStack |
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125 | // fStackCapacity |
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126 | // fStackTop |
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127 | // This the stack array. Its an array of pointers to StackElem |
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128 | // structures. The capacity is the current high water mark of the |
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129 | // stack. The top is the current top of stack (i.e. the part of it |
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130 | // being used.) |
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131 | // ----------------------------------------------------------------------- |
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132 | unsigned int fEmptyNamespaceId; |
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133 | unsigned int fStackCapacity; |
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134 | unsigned int fStackTop; |
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135 | XMLStringPool fPrefixPool; |
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136 | StackElem** fStack; |
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137 | MemoryManager* fMemoryManager; |
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138 | }; |
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139 | |
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140 | |
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141 | // --------------------------------------------------------------------------- |
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142 | // NamespaceScope: Stack access |
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143 | // --------------------------------------------------------------------------- |
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144 | inline unsigned int |
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145 | NamespaceScope::getNamespaceForPrefix(const XMLCh* const prefixToMap) const { |
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146 | |
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147 | return getNamespaceForPrefix(prefixToMap, (int)(fStackTop - 1)); |
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148 | } |
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149 | |
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150 | // --------------------------------------------------------------------------- |
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151 | // NamespaceScope: Miscellaneous methods |
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152 | // --------------------------------------------------------------------------- |
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153 | inline bool NamespaceScope::isEmpty() const |
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154 | { |
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155 | return (fStackTop == 0); |
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156 | } |
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157 | |
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158 | XERCES_CPP_NAMESPACE_END |
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159 | |
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160 | #endif |
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161 | |
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162 | /** |
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163 | * End of file NameSpaceScope.hpp |
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164 | */ |
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165 | |
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