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83 lines
1.8 KiB
C++
83 lines
1.8 KiB
C++
/*
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* The contents of this file are subject to the Initial
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* Developer's Public License Version 1.0 (the "License");
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* you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
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*
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* Software distributed under the License is distributed AS IS,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied.
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* See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Original Code was created by Claudio Valderrama on 25-Sept-2007
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* for the Firebird Open Source RDBMS project.
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*
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* Copyright (c) 2007 Claudio Valderrama
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* and all contributors signed below.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*
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*/
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#ifndef FB_COLLIST_H
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#define FB_COLLIST_H
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#include "../jrd/constants.h"
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// This is a linked list implementing a seldom used feature: the ability to
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// asssign a maximum width to each column, by name. The name should match the
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// one that appears in a result set (from a SELECT statement).
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// Each "item" represents a column name and its associated length.
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class ColList
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{
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public:
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struct item
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{
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TEXT col_name[MAX_SQL_IDENTIFIER_SIZE];
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int col_len;
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item* next;
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item(const char* name, int len);
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};
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ColList();
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~ColList();
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void clear();
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item* getHead();
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bool put(const char* name, int len);
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bool remove(const char* name);
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const item* find(const char* name) const;
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bool find(const char* name, int* out_len) const;
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size_t count() const;
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private:
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size_t m_count;
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item* m_head;
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};
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inline ColList::ColList()
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: m_count(0), m_head(0)
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{
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}
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inline ColList::~ColList()
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{
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clear();
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}
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inline ColList::item* ColList::getHead()
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{
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return m_head;
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}
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inline size_t ColList::count() const
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{
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return m_count;
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}
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#endif // FB_COLLIST_H
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