89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 1999, Microsoft Corp. All rights reserved.
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//
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// FILE
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//
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// attridx.h
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//
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// SYNOPSIS
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//
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// Declares the class AttributeIndex
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//
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// MODIFICATION HISTORY
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//
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// 02/04/2000 Original version.
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//
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///////////////////////////////////////////////////////////////////////////////
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#ifndef ATTRIDX_H
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#define ATTRIDX_H
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#if _MSC_VER >= 1000
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#pragma once
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#endif
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struct AttributeDefinition;
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class AttributeIndex
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{
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public:
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AttributeIndex() throw ()
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: table(NULL), mask(0), hashFn(NULL), equalFn(NULL)
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{ }
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~AttributeIndex() throw ()
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{ delete[] table; }
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// Used for hashing AttributeDefinitions.
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typedef ULONG (WINAPI *HashFn)(
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const AttributeDefinition& def
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) throw ();
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// Used for testing equality of AttributeDefinitions.
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typedef BOOL (WINAPI *EqualFn)(
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const AttributeDefinition& def1,
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const AttributeDefinition& def2
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) throw ();
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// Used for determining which definitions should be indexed.
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typedef BOOL (WINAPI *FilterFn)(
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const AttributeDefinition& def
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) throw ();
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// Create a new index. Any existing index is destroyed.
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void create(
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const AttributeDefinition* begin,
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const AttributeDefinition* end,
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HashFn hash,
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EqualFn equal,
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FilterFn filterFn = NULL
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);
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// Find an AttributeDefinition according to the key.
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const AttributeDefinition* find(
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const AttributeDefinition& key
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) const throw ();
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private:
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// Node in a bucket.
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struct Node
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{
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const Node* next;
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const AttributeDefinition* def;
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};
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// Bucket in a hash table.
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typedef Node* Bucket;
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Bucket* table; // The hash table.
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ULONG mask; // Mask used for reducing hash values.
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HashFn hashFn; // Function used for hashing definitions.
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EqualFn equalFn; // Function used for comparing definitions to key.
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// Not implemented.
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AttributeIndex(const AttributeIndex&) throw ();
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AttributeIndex& operator=(const AttributeIndex&) throw ();
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};
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#endif // ATTRIDX_H
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