[358] | 1 | /*
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| 2 | * Copyright 2001,2004 The Apache Software Foundation.
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | */
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| 16 |
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| 17 | /*
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| 18 | * $Id: NamespaceScope.hpp,v 1.6 2004/09/08 13:56:56 peiyongz Exp $
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| 19 | */
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| 20 |
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| 21 | #if !defined(NAMESPACESCOPE_HPP)
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| 22 | #define NAMESPACESCOPE_HPP
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| 23 |
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| 24 | #include <xercesc/util/StringPool.hpp>
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| 25 |
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| 26 | XERCES_CPP_NAMESPACE_BEGIN
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| 27 |
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| 28 | //
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| 29 | // NamespaceScope provides a data structure for mapping namespace prefixes
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| 30 | // to their URI's. The mapping accurately reflects the scoping of namespaces
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| 31 | // at a particular instant in time.
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| 32 | //
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| 33 |
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| 34 | class VALIDATORS_EXPORT NamespaceScope : public XMemory
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| 35 | {
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| 36 | public :
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| 37 | // -----------------------------------------------------------------------
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| 38 | // Class specific data types
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| 39 | //
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| 40 | // These really should be private, but some of the compilers we have to
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| 41 | // support are too dumb to deal with that.
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| 42 | //
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| 43 | // PrefMapElem
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| 44 | // fURIId is the id of the URI from the validator's URI map. The
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| 45 | // fPrefId is the id of the prefix from our own prefix pool. The
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| 46 | // namespace stack consists of these elements.
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| 47 | //
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| 48 | // StackElem
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| 49 | // The fMapCapacity is how large fMap has grown so far. fMapCount
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| 50 | // is how many of them are valid right now.
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| 51 | // -----------------------------------------------------------------------
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| 52 | struct PrefMapElem : public XMemory
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| 53 | {
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| 54 | unsigned int fPrefId;
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| 55 | unsigned int fURIId;
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| 56 | };
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| 57 |
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| 58 | struct StackElem : public XMemory
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| 59 | {
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| 60 | PrefMapElem* fMap;
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| 61 | unsigned int fMapCapacity;
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| 62 | unsigned int fMapCount;
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| 63 | };
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| 64 |
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| 65 |
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| 66 | // -----------------------------------------------------------------------
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| 67 | // Constructors and Destructor
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| 68 | // -----------------------------------------------------------------------
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| 69 | NamespaceScope(MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
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| 70 | ~NamespaceScope();
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| 71 |
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| 72 |
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| 73 | // -----------------------------------------------------------------------
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| 74 | // Stack access
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| 75 | // -----------------------------------------------------------------------
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| 76 | unsigned int increaseDepth();
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| 77 | unsigned int decreaseDepth();
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| 78 |
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| 79 | // -----------------------------------------------------------------------
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| 80 | // Prefix map methods
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| 81 | // -----------------------------------------------------------------------
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| 82 | void addPrefix(const XMLCh* const prefixToAdd,
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| 83 | const unsigned int uriId);
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| 84 |
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| 85 | unsigned int getNamespaceForPrefix(const XMLCh* const prefixToMap) const;
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| 86 | unsigned int getNamespaceForPrefix(const XMLCh* const prefixToMap,
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| 87 | const int depthLevel) const;
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| 88 |
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| 89 |
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| 90 | // -----------------------------------------------------------------------
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| 91 | // Miscellaneous methods
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| 92 | // -----------------------------------------------------------------------
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| 93 | bool isEmpty() const;
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| 94 | void reset(const unsigned int emptyId);
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| 95 |
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| 96 |
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| 97 | private :
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| 98 | // -----------------------------------------------------------------------
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| 99 | // Unimplemented constructors and operators
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| 100 | // -----------------------------------------------------------------------
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| 101 | NamespaceScope(const NamespaceScope&);
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| 102 | NamespaceScope& operator=(const NamespaceScope&);
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| 103 |
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| 104 |
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| 105 | // -----------------------------------------------------------------------
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| 106 | // Private helper methods
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| 107 | // -----------------------------------------------------------------------
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| 108 | void expandMap(StackElem* const toExpand);
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| 109 | void expandStack();
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| 110 |
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| 111 |
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| 112 | // -----------------------------------------------------------------------
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| 113 | // Data members
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| 114 | //
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| 115 | // fEmptyNamespaceId
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| 116 | // This is the special URI id for the "" namespace, which is magic
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| 117 | // because of the xmlns="" operation.
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| 118 | //
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| 119 | // fPrefixPool
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| 120 | // This is the prefix pool where prefixes are hashed and given unique
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| 121 | // ids. These ids are used to track prefixes in the element stack.
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| 122 | //
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| 123 | // fStack
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| 124 | // fStackCapacity
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| 125 | // fStackTop
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| 126 | // This the stack array. Its an array of pointers to StackElem
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| 127 | // structures. The capacity is the current high water mark of the
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| 128 | // stack. The top is the current top of stack (i.e. the part of it
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| 129 | // being used.)
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| 130 | // -----------------------------------------------------------------------
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| 131 | unsigned int fEmptyNamespaceId;
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| 132 | unsigned int fStackCapacity;
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| 133 | unsigned int fStackTop;
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| 134 | XMLStringPool fPrefixPool;
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| 135 | StackElem** fStack;
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| 136 | MemoryManager* fMemoryManager;
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| 137 | };
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| 138 |
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| 139 |
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| 140 | // ---------------------------------------------------------------------------
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| 141 | // NamespaceScope: Stack access
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| 142 | // ---------------------------------------------------------------------------
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| 143 | inline unsigned int
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| 144 | NamespaceScope::getNamespaceForPrefix(const XMLCh* const prefixToMap) const {
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| 145 |
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| 146 | return getNamespaceForPrefix(prefixToMap, (int)(fStackTop - 1));
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| 147 | }
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| 148 |
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| 149 | // ---------------------------------------------------------------------------
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| 150 | // NamespaceScope: Miscellaneous methods
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| 151 | // ---------------------------------------------------------------------------
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| 152 | inline bool NamespaceScope::isEmpty() const
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| 153 | {
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| 154 | return (fStackTop == 0);
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| 155 | }
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| 156 |
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| 157 | XERCES_CPP_NAMESPACE_END
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| 158 |
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| 159 | #endif
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| 160 |
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| 161 | /**
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| 162 | * End of file NameSpaceScope.hpp
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| 163 | */
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| 164 |
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