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abf9557bb5
AVL trees can't be copied with the default copy constructor as the parent pointer of the first item of both of the resulting trees would point to the original tree. Copying an AVL node, however, generally violates the integrity of the corresponding tree. The copy constructor of Avl_tree is used in some places but in those places it can be replaced easily. So, this commit deletes the copy constructor of Avl_node_base which makes Avl_node and Avl_tree non-copyable. Issue #2654
87 lines
1.6 KiB
C++
87 lines
1.6 KiB
C++
/*
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* \brief Utility for handling strings as AVL-node keys
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* \author Norman Feske
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* \date 2006-07-12
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*/
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/*
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* Copyright (C) 2006-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__UTIL__AVL_STRING_H_
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#define _INCLUDE__UTIL__AVL_STRING_H_
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#include <util/avl_tree.h>
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#include <util/string.h>
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namespace Genode {
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class Avl_string_base;
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template <int> class Avl_string;
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}
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class Genode::Avl_string_base : public Avl_node<Avl_string_base>
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{
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private:
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struct { const char *_str; };
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protected:
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/**
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* Constructor
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*
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* \noapi
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*/
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Avl_string_base(const char *str) : _str(str) { }
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public:
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const char *name() const { return _str; }
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/************************
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** Avl node interface **
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************************/
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bool higher(Avl_string_base *c) { return (strcmp(c->_str, _str) > 0); }
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/**
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* Find by name
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*/
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Avl_string_base *find_by_name(const char *name)
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{
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if (strcmp(name, _str) == 0) return this;
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Avl_string_base *c = Avl_node<Avl_string_base>::child(strcmp(name, _str) > 0);
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return c ? c->find_by_name(name) : 0;
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}
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};
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/*
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* The template pumps up the Avl_string_base object and provides the buffer for
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* the actual string.
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*/
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template <int STR_LEN>
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class Genode::Avl_string : public Avl_string_base
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{
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private:
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char _str_buf[STR_LEN];
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public:
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Avl_string(const char *str) : Avl_string_base(_str_buf)
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{
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strncpy(_str_buf, str, sizeof(_str_buf));
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_str_buf[STR_LEN - 1] = 0;
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}
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};
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#endif /* _INCLUDE__UTIL__AVL_STRING_H_ */
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