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| 4419 | trochtova | 1 | /* |
| 2 | * Copyright (c) 2009 Jiri Svoboda |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup kbdgen generic |
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| 30 | * @brief Generic scancode parser. |
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| 31 | * @ingroup kbd |
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| 32 | * @{ |
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| 33 | */ |
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| 34 | /** @file |
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| 35 | */ |
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| 36 | |||
| 37 | #ifndef KBD_GSP_H_ |
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| 38 | #define KBD_GSP_H_ |
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| 39 | |||
| 4537 | trochtova | 40 | #include <adt/hash_table.h> |
| 4419 | trochtova | 41 | |
| 42 | enum { |
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| 43 | GSP_END = -1, /**< Terminates a sequence. */ |
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| 44 | GSP_DEFAULT = -2 /**< Wildcard, catches unhandled cases. */ |
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| 45 | }; |
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| 46 | |||
| 47 | /** Scancode parser description */ |
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| 48 | typedef struct { |
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| 49 | /** Transition table, (state, input) -> (state, output) */ |
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| 50 | hash_table_t trans; |
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| 51 | |||
| 52 | /** Number of states */ |
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| 53 | int states; |
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| 54 | } gsp_t; |
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| 55 | |||
| 56 | /** Scancode parser transition. */ |
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| 57 | typedef struct { |
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| 58 | link_t link; /**< Link to hash table in @c gsp_t */ |
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| 59 | |||
| 60 | /* Preconditions */ |
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| 61 | |||
| 62 | int old_state; /**< State before transition */ |
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| 63 | int input; /**< Input symbol (scancode) */ |
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| 64 | |||
| 65 | /* Effects */ |
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| 66 | |||
| 67 | int new_state; /**< State after transition */ |
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| 68 | |||
| 69 | /* Output emitted during transition */ |
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| 70 | |||
| 71 | unsigned out_mods; /**< Modifier to emit */ |
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| 72 | unsigned out_key; /**< Keycode to emit */ |
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| 73 | } gsp_trans_t; |
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| 74 | |||
| 75 | extern void gsp_init(gsp_t *); |
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| 76 | extern int gsp_insert_defs(gsp_t *, const int *); |
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| 77 | extern int gsp_insert_seq(gsp_t *, const int *, unsigned, unsigned); |
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| 78 | extern int gsp_step(gsp_t *, int, int, unsigned *, unsigned *); |
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| 79 | |||
| 80 | #endif |
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| 81 | |||
| 82 | /** |
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| 83 | * @} |
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| 84 | */ |