aboutsummaryrefslogtreecommitdiffstats
path: root/android/hw-events.c
blob: 7c3f9e9fe8d885d3064230eae10a8a5d01ce2860 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
/* Copyright (C) 2007-2008 The Android Open Source Project
**
** This software is licensed under the terms of the GNU General Public
** License version 2, as published by the Free Software Foundation, and
** may be copied, distributed, and modified under those terms.
**
** 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 General Public License for more details.
*/
#include "android/hw-events.h"
#include "android/utils/bufprint.h"
#include <stdlib.h>
#include <string.h>

typedef struct {
    const char*  name;
    int          value;
} EventInfo;

#define  EV_TYPE(n,v)   { "EV_" STRINGIFY(n), (v) },

#define  BTN_CODE(n,v)  { "BTN_" STRINGIFY(n), (v) },
#define  KEY_CODE(n,v)  { "KEY_" STRINGIFY(n), (v) },
#define  REL_CODE(n,v)  { "REL_" STRINGIFY(n), (v) },
#define  ABS_CODE(n,v)  { "ABS_" STRINGIFY(n), (v) },
#define  END_CODE       { NULL, 0 }

static const EventInfo  _ev_types_tab[] =
{
    EVENT_TYPE_LIST
    END_CODE
};

static const EventInfo _key_codes_list[] =
{
    EVENT_KEY_LIST
    EVENT_BTN_LIST
    END_CODE
};

static const EventInfo _rel_codes_list[] =
{
    EVENT_REL_LIST
    END_CODE
};
static const EventInfo _abs_codes_list[] =
{
    EVENT_ABS_LIST
    END_CODE
};

#undef EV_TYPE
#undef BTN_CODE
#undef KEY_CODE
#undef REL_CODE
#undef ABS_CODE

typedef const EventInfo*  EventList;

typedef struct {
    int               type;
    const EventInfo*  table;
} EventCodeList;


static const EventCodeList  _codes[] = {
    { EV_KEY, _key_codes_list },
    { EV_REL, _rel_codes_list },
    { EV_ABS, _abs_codes_list },
    { -1, NULL }
};

static EventList
eventList_findByType( int  type )
{
    int  nn;

    for (nn = 0; _codes[nn].type >= 0; nn++) {
        if (_codes[nn].type == type)
            return _codes[nn].table;
    }
    return NULL;
}

static int
eventList_getCount( EventList  list )
{
    int  nn;

    if (list == NULL)
        return 0;

    for (nn = 0; list[nn].name != NULL; nn++) {
        /* nothing */
    }
    return nn;
}

static int
eventList_findCodeByName( EventList    list,
                          const char*  name,
                          int          namelen )
{
    if (namelen <= 0)
        return -1;

    for ( ; list != NULL; list += 1 ) {
        if ( !memcmp(name, list->name, namelen) &&
             list->name[namelen] == 0 )
        {
            return list->value;
        }
    }
    return -1;
}

static char*
eventList_bufprintCode( EventList  list,
                        int        index,
                        char*      buf,
                        char*      bufend )
{
    if (list == NULL)
        return buf;

    return bufprint(buf, bufend, "%s", list[index].name);
}


int
android_event_from_str( const char*  name,
                        int         *ptype,
                        int         *pcode,
                        int         *pvalue )
{
    const char*  p;
    const char*  pend;
    const char*  q;
    EventList    list;
    char*        end;

    *ptype  = 0;
    *pcode  = 0;
    *pvalue = 0;

    p    = name;
    pend = p + strcspn(p, " \t");
    q    = strchr(p, ':');
    if (q == NULL || q > pend)
        q = pend;

    *ptype = eventList_findCodeByName( _ev_types_tab, p, q-p );
    if (*ptype < 0) {
        *ptype = (int) strtol( p, &end, 0 );
        if (end != q)
            return -1;
    }

    if (*q != ':')
        return 0;

    p = q + 1;
    q = strchr(p, ':');
    if (q == NULL || q > pend)
        q = pend;

    list   = eventList_findByType( *ptype );
    *pcode = eventList_findCodeByName( list, p, q-p );
    if (*pcode < 0) {
        *pcode = (int) strtol( p, &end, 0 );
        if (end != q)
            return -2;
    }

    if (*q != ':')
        return 0;

    p = q + 1;
    q = strchr(p, ':');
    if (q == NULL || q > pend)
        q = pend;

    *pvalue = (int)strtol( p, &end, 0 );
    if (end != q)
        return -3;

    return 0;
}

int
android_event_get_type_count( void )
{
    return eventList_getCount( _ev_types_tab );
}

char*
android_event_bufprint_type_str( char*  buff, char*  end, int  type_index )
{
    return eventList_bufprintCode( _ev_types_tab, type_index, buff, end );
}

/* returns the list of valid event code string aliases for a given event type */
int
android_event_get_code_count( int  type )
{
    EventList  list = eventList_findByType(type);

    return eventList_getCount(list);
}

char*
android_event_bufprint_code_str( char*  buff, char*  end, int  type, int  code_index )
{
    EventList  list = eventList_findByType(type);

    return eventList_bufprintCode(list, code_index, buff, end);
}