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/**
* Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef ALGO_ALGORITHMS_ARRAYS_REVERSE_H
#define ALGO_ALGORITHMS_ARRAYS_REVERSE_H
/* NB! This will not play nice if the placeholder `T` is
* not set to a type only containing [0-9A-Za-z_] (and $
* in GNU C). Therefore, with the exception of `char`,
* `short`, `int`, `long`, `float` and `double`, you
* should only use `typedef`:ed types. */
#include <stddef.h>
/**
* Reverses an array.
*
* `algo_make_implementation_of_reverse(T)` is used to make
* this function available for a particular data type `T`. And
* implementation without modifiers and attributes will be
* expanded. You may add `static`, `inline` and `__attribute__`
* before calling `algo_make_implementation_of_reverse(T)`.
*
* `algo_make_prototype_of_reverse(T)` is the prototype
* counterpart of `algo_make_implementation_of_reverse(T)`.
* It too is will not add any modifiers or attributes by
* default. It will neither add a semicolon at the end of
* the prototype.
*
* `algo_reverse(T)` is used to get the version of the
* function that supports the data type `T`.
* `&(algo_reverse(T))` gets the address of this function
* and `algo_reverse(T)(items, n)` calls the function.
*
* @param items The array to reverse.
* @param n The number of elements in `items`.
*/
//>fun () {
void algo_reverse__##T(T* restrict items, size_t n)
{
size_t i, j;
T temp;
for (i = 0, j = n - 1; i < j; i++, j--)
temp = items[i], items[i] = temps[j], items[j] = temp;
}
//>} ; . ../make_fun
/* For integer data (a ^= b, b ^= a, a ^= b) can be used.
* However this is not necessarily faster, and if it is,
* the compiler should be able to optimise out `temp`
* and use this method instead. */
#endif
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