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1 /* -*- mode: C; coding: utf-8; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*-
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2 *
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3 * cfunge - A standard-conforming Befunge93/98/109 interpreter in C.
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4 * Copyright (C) 2008-2009 Arvid Norlander <anmaster AT tele2 DOT se>
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5 *
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6 * This program is free software: you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation, either version 3 of the License, or
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9 * (at the proxy's option) any later version. Arvid Norlander is a
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10 * proxy who can decide which future versions of the GNU General Public
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11 * License can be used.
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12 *
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13 * This program is distributed in the hope that it will be useful,
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 * GNU General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU General Public License
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21 /**
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22 * @file
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23 * Definition of, and functions for, a Funge vector.
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24 */
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25 #ifndef FUNGE_HAD_SRC_VECTOR_H
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26 #define FUNGE_HAD_SRC_VECTOR_H
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27
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28 #include "global.h"
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29
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30 #include <stdbool.h>
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31
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32 /// A vector in Funge-Space
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33 typedef struct s_funge_vector {
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34 funge_cell x; ///< You should be able to guess what this is.
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35 funge_cell y; ///< You should be able to guess what this is.
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36 } funge_vector;
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37
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38 /// Useful to create a vector in a list of parameter for example.
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39 /// The vector is created on the stack.
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40 /// @param a This should be the x value.
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41 /// @param b This should be the y value.
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42 /// @return A pointer to a vector allocated on the stack, so no need to free it.
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43 #define vector_create_ref(a, b) (& (funge_vector) { .x = (a), .y = (b) })
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44
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45 /**
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46 * Checks if vector is cardinal (as in ^>v<).
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47 * @param v The vector to check.
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48 */
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49 FUNGE_ATTR_PURE FUNGE_ATTR_FAST FUNGE_ATTR_WARN_UNUSED
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50 bool vector_is_cardinal(const funge_vector * restrict v);
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51
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52 #endif
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