86 lines
1.6 KiB
C++
86 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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copy_cstring(_str_buf, str, sizeof(_str_buf));
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}
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};
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#endif /* _INCLUDE__UTIL__AVL_STRING_H_ */
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