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1 | /* |
1 | /* |
2 | * Copyright (c) 2009 Jiri Svoboda |
2 | * Copyright (c) 2009 Jiri Svoboda |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup kbdgen generic |
29 | /** @addtogroup kbdgen generic |
30 | * @brief Generic scancode parser. |
30 | * @brief Generic scancode parser. |
31 | * @ingroup kbd |
31 | * @ingroup kbd |
32 | * @{ |
32 | * @{ |
33 | */ |
33 | */ |
34 | /** @file |
34 | /** @file |
35 | */ |
35 | */ |
36 | 36 | ||
37 | #ifndef KBD_GSP_H_ |
37 | #ifndef KBD_GSP_H_ |
38 | #define KBD_GSP_H_ |
38 | #define KBD_GSP_H_ |
39 | 39 | ||
40 | #include <libadt/hash_table.h> |
40 | #include <adt/hash_table.h> |
41 | 41 | ||
42 | enum { |
42 | enum { |
43 | GSP_END = -1, /**< Terminates a sequence. */ |
43 | GSP_END = -1, /**< Terminates a sequence. */ |
44 | GSP_DEFAULT = -2 /**< Wildcard, catches unhandled cases. */ |
44 | GSP_DEFAULT = -2 /**< Wildcard, catches unhandled cases. */ |
45 | }; |
45 | }; |
46 | 46 | ||
47 | /** Scancode parser description */ |
47 | /** Scancode parser description */ |
48 | typedef struct { |
48 | typedef struct { |
49 | /** Transition table, (state, input) -> (state, output) */ |
49 | /** Transition table, (state, input) -> (state, output) */ |
50 | hash_table_t trans; |
50 | hash_table_t trans; |
51 | 51 | ||
52 | /** Number of states */ |
52 | /** Number of states */ |
53 | int states; |
53 | int states; |
54 | } gsp_t; |
54 | } gsp_t; |
55 | 55 | ||
56 | /** Scancode parser transition. */ |
56 | /** Scancode parser transition. */ |
57 | typedef struct { |
57 | typedef struct { |
58 | link_t link; /**< Link to hash table in @c gsp_t */ |
58 | link_t link; /**< Link to hash table in @c gsp_t */ |
59 | 59 | ||
60 | /* Preconditions */ |
60 | /* Preconditions */ |
61 | 61 | ||
62 | int old_state; /**< State before transition */ |
62 | int old_state; /**< State before transition */ |
63 | int input; /**< Input symbol (scancode) */ |
63 | int input; /**< Input symbol (scancode) */ |
64 | 64 | ||
65 | /* Effects */ |
65 | /* Effects */ |
66 | 66 | ||
67 | int new_state; /**< State after transition */ |
67 | int new_state; /**< State after transition */ |
68 | 68 | ||
69 | /* Output emitted during transition */ |
69 | /* Output emitted during transition */ |
70 | 70 | ||
71 | unsigned out_mods; /**< Modifier to emit */ |
71 | unsigned out_mods; /**< Modifier to emit */ |
72 | unsigned out_key; /**< Keycode to emit */ |
72 | unsigned out_key; /**< Keycode to emit */ |
73 | } gsp_trans_t; |
73 | } gsp_trans_t; |
74 | 74 | ||
75 | extern void gsp_init(gsp_t *); |
75 | extern void gsp_init(gsp_t *); |
76 | extern int gsp_insert_defs(gsp_t *, const int *); |
76 | extern int gsp_insert_defs(gsp_t *, const int *); |
77 | extern int gsp_insert_seq(gsp_t *, const int *, unsigned, unsigned); |
77 | extern int gsp_insert_seq(gsp_t *, const int *, unsigned, unsigned); |
78 | extern int gsp_step(gsp_t *, int, int, unsigned *, unsigned *); |
78 | extern int gsp_step(gsp_t *, int, int, unsigned *, unsigned *); |
79 | 79 | ||
80 | #endif |
80 | #endif |
81 | 81 | ||
82 | /** |
82 | /** |
83 | * @} |
83 | * @} |
84 | */ |
84 | */ |
85 | 85 |