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annotate libmlk-core/mlk/core/gamepad.c @ 559:ba0cca39e4ca

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util: fmemopen leftover
author David Demelier <markand@malikania.fr>
date Wed, 08 Mar 2023 20:01:00 +0100
parents 773a082f0b91
children f2737a931658
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1 /*
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2 * gamepad.c -- game controller support
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3 *
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4 * Copyright (c) 2020-2023 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <assert.h>
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20 #include <string.h>
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21
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22 #include <SDL.h>
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23
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24 #include "err.h"
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25 #include "gamepad.h"
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26
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27 int
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28 mlk_gamepad_open(struct mlk_gamepad *pad, int idx)
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29 {
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30 assert(pad);
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31
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32 memset(pad, 0, sizeof (*pad));
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33
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34 if (!(pad->handle = SDL_GameControllerOpen(idx)))
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35 return MLK_ERR_SDL;
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36
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37 return 0;
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38 }
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39
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40 void
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41 mlk_gamepad_finish(struct mlk_gamepad *pad)
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42 {
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43 assert(pad);
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44
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45 if (pad->handle)
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46 SDL_GameControllerClose(pad->handle);
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47
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48 memset(pad, 0, sizeof (*pad));
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49 }
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50
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51 int
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52 mlk_gamepad_iter_begin(struct mlk_gamepad_iter *it)
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53 {
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54 assert(it);
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55
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56 memset(it, 0, sizeof (*it));
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57 it->idx = -1;
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58
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59 if ((it->end = SDL_NumJoysticks()) < 0) {
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60 it->end = 0;
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61 return MLK_ERR_SDL;
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62 }
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63
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64 return 0;
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65 }
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66
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67 int
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68 mlk_gamepad_iter_next(struct mlk_gamepad_iter *it)
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69 {
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70 /*
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71 * Go to the next gamepad, we need to iterate because SDL can combines
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72 * joystick and game controllers with the same API.
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73 */
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74 for (++it->idx; it->idx < it->end && !SDL_IsGameController(it->idx); ++it->idx)
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75 continue;
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76
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77 /* End of iteration. */
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78 if (it->idx >= it->end) {
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79 memset(it, 0, sizeof (*it));
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80 return 0;
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81 }
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82
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83 it->name = SDL_GameControllerNameForIndex(it->idx);
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84
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85 return 1;
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86 }