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
221
222
223
|
/* 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;
} PairRec;
#define EV_TYPE(n,v) { STRINGIFY(n), (v) },
#define BTN_CODE(n,v) { STRINGIFY(n), (v) },
#define REL_CODE(n,v) { STRINGIFY(n), (v) },
#define ABS_CODE(n,v) { STRINGIFY(n), (v) },
static const PairRec _ev_types_tab[] =
{
EVENT_TYPE_LIST
{ NULL, 0 }
};
static const PairRec _btn_codes_list[] =
{
EVENT_BTN_LIST
{ NULL, 0 }
};
static const PairRec _rel_codes_list[] =
{
EVENT_REL_LIST
{ NULL, 0 }
};
static const PairRec _abs_codes_list[] =
{
EVENT_ABS_LIST
{ NULL, 0 }
};
#undef EV_TYPE
#undef BTN_CODE
#undef REL_CODE
#undef ABS_CODE
static int
count_list( const PairRec* list )
{
int nn = 0;
while (list[nn].name != NULL)
nn += 1;
return nn;
}
static int
scan_list( const PairRec* list,
const char* prefix,
const char* name,
int namelen )
{
int len;
if (namelen <= 0)
return -1;
len = strlen(prefix);
if (namelen <= len)
return -1;
if ( memcmp( name, prefix, len ) != 0 )
return -1;
name += len;
namelen -= len;
for ( ; list->name != NULL; list += 1 )
{
if ( memcmp( list->name, name, namelen ) == 0 && list->name[namelen] == 0 )
return list->value;
}
return -1;
}
typedef struct {
int type;
const char* prefix;
const PairRec* pairs;
} TypeListRec;
typedef const TypeListRec* TypeList;
static const TypeListRec _types_list[] =
{
{ EV_KEY, "BTN_", _btn_codes_list },
{ EV_REL, "REL_", _rel_codes_list },
{ EV_ABS, "ABS_", _abs_codes_list },
{ -1, NULL, NULL }
};
static TypeList
find_type_list( int type )
{
TypeList list = _types_list;
for ( ; list->type >= 0; list += 1 )
if (list->type == type)
return list;
return NULL;
}
int
android_event_from_str( const char* name,
int *ptype,
int *pcode,
int *pvalue )
{
const char* p;
const char* pend;
const char* q;
TypeList 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 = scan_list( _ev_types_tab, "EV_", 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 = find_type_list( *ptype );
*pcode = -1;
if (list != NULL) {
*pcode = scan_list( list->pairs, list->prefix, 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 count_list( _ev_types_tab );
}
char*
android_event_bufprint_type_str( char* buff, char* end, int type_index )
{
return bufprint( buff, end, "EV_%s", _ev_types_tab[type_index].name );
}
/* returns the list of valid event code string aliases for a given event type */
int
android_event_get_code_count( int type )
{
TypeList list = find_type_list(type);
if (list == NULL)
return 0;
return count_list( list->pairs );
}
char*
android_event_bufprint_code_str( char* buff, char* end, int type, int code_index )
{
TypeList list = find_type_list(type);
if (list == NULL)
return buff;
return bufprint( buff, end, "%s%s", list->prefix, list->pairs[code_index].name );
}
|
