mirror of https://github.com/ArduPilot/ardupilot
119 lines
2.9 KiB
C++
119 lines
2.9 KiB
C++
/*
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define DECLARE_TYPESAFE_INDEX(NAME, TYPE) typedef typesafe_index<TYPE, class TAG_##NAME> NAME
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/// This template allows for indexing with compile time check and generating
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/// error for using one index variable for another array that is to be indexed
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/// with different variable.
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/// base_type specifies
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///
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/// @param base_type Base integral type
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///
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/// @param tag Tag Name to prevent copy from one type to other
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///
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template <class base_type, class tag> class typesafe_index
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{
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public:
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explicit typesafe_index(base_type i = base_type()) : p(i) {}
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void operator=(const base_type& val)
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{
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p = val;
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}
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constexpr base_type get_int() const
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{
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return p;
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}
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typesafe_index operator++()
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{
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return typesafe_index(++p);
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}
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typesafe_index operator++(int)
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{
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return typesafe_index(p++);
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}
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typesafe_index operator%(const base_type& val)
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{
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return typesafe_index(p % val);
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}
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bool operator<(const base_type& val) const
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{
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return (p<val);
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}
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bool operator<=(const base_type& val) const
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{
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return (p<=val);
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}
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bool operator>=(const base_type& val) const
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{
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return (p>=val);
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}
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bool operator>(const base_type& val) const
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{
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return (p>val);
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}
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bool operator!=(const base_type& val) const
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{
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return (p!=val);
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}
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bool operator==(const base_type& val) const
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{
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return (p==val);
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}
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explicit constexpr operator base_type() const
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{
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return p;
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}
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typesafe_index operator+(const base_type& val) const
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{
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return typesafe_index(p+val);
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}
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private:
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base_type p;
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};
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/// This template associates the base_type array with accessor_type(index).
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/// So the elements can be accessed using [] only using accessor_type index
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/// _priv_instance is kept public for use in Parameter declaration.
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///
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template <class base_type, uint32_t num_instances, typename accessor_type> class RestrictIDTypeArray
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{
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public:
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base_type _priv_instance[num_instances];
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base_type& operator[](const accessor_type& index)
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{
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return _priv_instance[index.get_int()];
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}
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constexpr const base_type& operator[](const accessor_type& index) const
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{
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return _priv_instance[index.get_int()];
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}
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};
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