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
|
// SPDX-License-Identifier: MIT
/*
* Copyright © 2013 David Herrmann <dh.herrmann@gmail.com>
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "libevdev-int.h"
#include "libevdev-util.h"
#include "libevdev.h"
#include "event-names.h"
struct name_lookup {
const char *name;
size_t len;
};
static int cmp_entry(const void *vlookup, const void *ventry)
{
const struct name_lookup *lookup = vlookup;
const struct name_entry *entry = ventry;
int r;
r = strncmp(lookup->name, entry->name, lookup->len);
if (!r) {
if (entry->name[lookup->len])
r = -1;
else
r = 0;
}
return r;
}
static const struct name_entry*
lookup_name(const struct name_entry *array, size_t asize,
struct name_lookup *lookup)
{
const struct name_entry *entry;
entry = bsearch(lookup, array, asize, sizeof(*array), cmp_entry);
if (!entry)
return NULL;
return entry;
}
LIBEVDEV_EXPORT int
libevdev_event_type_from_name(const char *name)
{
return libevdev_event_type_from_name_n(name, strlen(name));
}
LIBEVDEV_EXPORT int
libevdev_event_type_from_name_n(const char *name, size_t len)
{
struct name_lookup lookup;
const struct name_entry *entry;
lookup.name = name;
lookup.len = len;
entry = lookup_name(ev_names, ARRAY_LENGTH(ev_names), &lookup);
return entry ? (int)entry->value : -1;
}
static int type_from_prefix(const char *name, ssize_t len)
{
const char *e;
size_t i;
ssize_t l;
/* MAX_ is not allowed, even though EV_MAX exists */
if (startswith(name, len, "MAX_", 4))
return -1;
/* BTN_ is special as there is no EV_BTN type */
if (startswith(name, len, "BTN_", 4))
return EV_KEY;
/* FF_STATUS_ is special as FF_ is a prefix of it, so test it first */
if (startswith(name, len, "FF_STATUS_", 10))
return EV_FF_STATUS;
for (i = 0; i < ARRAY_LENGTH(ev_names); ++i) {
/* skip EV_ prefix so @e is suffix of [EV_]XYZ */
e = &ev_names[i].name[3];
l = strlen(e);
/* compare prefix and test for trailing _ */
if (len > l && startswith(name, len, e, l) && name[l] == '_')
return ev_names[i].value;
}
return -1;
}
LIBEVDEV_EXPORT int
libevdev_event_code_from_name(unsigned int type, const char *name)
{
return libevdev_event_code_from_name_n(type, name, strlen(name));
}
LIBEVDEV_EXPORT int
libevdev_event_code_from_name_n(unsigned int type, const char *name, size_t len)
{
struct name_lookup lookup;
const struct name_entry *entry;
int real_type;
/* verify that @name is really of type @type */
real_type = type_from_prefix(name, len);
if (real_type < 0 || (unsigned int)real_type != type)
return -1;
/* now look up the name @name and return the constant */
lookup.name = name;
lookup.len = len;
entry = lookup_name(code_names, ARRAY_LENGTH(code_names), &lookup);
return entry ? (int)entry->value : -1;
}
LIBEVDEV_EXPORT int
libevdev_event_value_from_name(unsigned int type, unsigned int code, const char *name)
{
return libevdev_event_value_from_name_n(type, code, name, strlen(name));
}
LIBEVDEV_EXPORT int
libevdev_event_value_from_name_n(unsigned int type, unsigned int code, const char *name, size_t len)
{
struct name_lookup lookup;
const struct name_entry *entry;
if (type != EV_ABS || code != ABS_MT_TOOL_TYPE)
return -1;
lookup.name = name;
lookup.len = len;
entry = lookup_name(tool_type_names, ARRAY_LENGTH(tool_type_names), &lookup);
return entry ? (int)entry->value : -1;
}
LIBEVDEV_EXPORT int
libevdev_property_from_name(const char *name)
{
return libevdev_property_from_name_n(name, strlen(name));
}
LIBEVDEV_EXPORT int
libevdev_property_from_name_n(const char *name, size_t len)
{
struct name_lookup lookup;
const struct name_entry *entry;
lookup.name = name;
lookup.len = len;
entry = lookup_name(prop_names, ARRAY_LENGTH(prop_names), &lookup);
return entry ? (int)entry->value : -1;
}
LIBEVDEV_EXPORT int
libevdev_event_code_from_code_name(const char *name)
{
return libevdev_event_code_from_code_name_n(name, strlen(name));
}
LIBEVDEV_EXPORT int
libevdev_event_code_from_code_name_n(const char *name, size_t len)
{
const struct name_entry *entry;
struct name_lookup lookup;
/* now look up the name @name and return the constant */
lookup.name = name;
lookup.len = len;
entry = lookup_name(code_names, ARRAY_LENGTH(code_names), &lookup);
return entry ? (int)entry->value : -1;
}
LIBEVDEV_EXPORT int
libevdev_event_type_from_code_name(const char *name)
{
return libevdev_event_type_from_code_name_n(name, strlen(name));
}
LIBEVDEV_EXPORT int
libevdev_event_type_from_code_name_n(const char *name, size_t len)
{
const struct name_entry *entry;
struct name_lookup lookup;
/* First look up if the name exists, we dont' want to return a valid
* type for an invalid code name */
lookup.name = name;
lookup.len = len;
entry = lookup_name(code_names, ARRAY_LENGTH(code_names), &lookup);
return entry ? type_from_prefix(name, len) : -1;
}
|
