summaryrefslogtreecommitdiffstats
path: root/src/3rdparty/xkbcommon/src/context.c
blob: 50993e108af6948128483840c0b184f1b4551e70 (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
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
/*
 * Copyright © 2012 Intel Corporation
 * Copyright © 2012 Ran Benita
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Author: Daniel Stone <daniel@fooishbar.org>
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <unistd.h>

#include "xkbcommon/xkbcommon.h"
#include "utils.h"
#include "context.h"

/**
 * Append one directory to the context's include path.
 */
XKB_EXPORT int
xkb_context_include_path_append(struct xkb_context *ctx, const char *path)
{
    struct stat stat_buf;
    int err;
    char *tmp;

    tmp = strdup(path);
    if (!tmp)
        goto err;

    err = stat(path, &stat_buf);
    if (err != 0)
        goto err;
    if (!S_ISDIR(stat_buf.st_mode))
        goto err;

#if defined(HAVE_EACCESS)
    if (eaccess(path, R_OK | X_OK) != 0)
        goto err;
#elif defined(HAVE_EUIDACCESS)
    if (euidaccess(path, R_OK | X_OK) != 0)
        goto err;
#endif

    darray_append(ctx->includes, tmp);
    return 1;

err:
    darray_append(ctx->failed_includes, tmp);
    return 0;
}

/**
 * Append the default include directories to the context.
 */
XKB_EXPORT int
xkb_context_include_path_append_default(struct xkb_context *ctx)
{
    const char *home, *root;
    char *user_path;
    int err;
    int ret = 0;

    root = secure_getenv("XKB_CONFIG_ROOT");
    if (root != NULL)
       ret |= xkb_context_include_path_append(ctx, root);
    else
       ret |= xkb_context_include_path_append(ctx, DFLT_XKB_CONFIG_ROOT);

    home = secure_getenv("HOME");
    if (!home)
        return ret;
    err = asprintf(&user_path, "%s/.xkb", home);
    if (err <= 0)
        return ret;
    ret |= xkb_context_include_path_append(ctx, user_path);
    free(user_path);

    return ret;
}

/**
 * Remove all entries in the context's include path.
 */
XKB_EXPORT void
xkb_context_include_path_clear(struct xkb_context *ctx)
{
    char **path;

    darray_foreach(path, ctx->includes)
        free(*path);
    darray_free(ctx->includes);

    darray_foreach(path, ctx->failed_includes)
        free(*path);
    darray_free(ctx->failed_includes);
}

/**
 * xkb_context_include_path_clear() + xkb_context_include_path_append_default()
 */
XKB_EXPORT int
xkb_context_include_path_reset_defaults(struct xkb_context *ctx)
{
    xkb_context_include_path_clear(ctx);
    return xkb_context_include_path_append_default(ctx);
}

/**
 * Returns the number of entries in the context's include path.
 */
XKB_EXPORT unsigned int
xkb_context_num_include_paths(struct xkb_context *ctx)
{
    return darray_size(ctx->includes);
}

/**
 * Returns the given entry in the context's include path, or NULL if an
 * invalid index is passed.
 */
XKB_EXPORT const char *
xkb_context_include_path_get(struct xkb_context *ctx, unsigned int idx)
{
    if (idx >= xkb_context_num_include_paths(ctx))
        return NULL;

    return darray_item(ctx->includes, idx);
}

/**
 * Take a new reference on the context.
 */
XKB_EXPORT struct xkb_context *
xkb_context_ref(struct xkb_context *ctx)
{
    ctx->refcnt++;
    return ctx;
}

/**
 * Drop an existing reference on the context, and free it if the refcnt is
 * now 0.
 */
XKB_EXPORT void
xkb_context_unref(struct xkb_context *ctx)
{
    if (!ctx || --ctx->refcnt > 0)
        return;

    xkb_context_include_path_clear(ctx);
    atom_table_free(ctx->atom_table);
    free(ctx);
}

static const char *
log_level_to_prefix(enum xkb_log_level level)
{
    switch (level) {
    case XKB_LOG_LEVEL_DEBUG:
        return "xkbcommon: DEBUG: ";
    case XKB_LOG_LEVEL_INFO:
        return "xkbcommon: INFO: ";
    case XKB_LOG_LEVEL_WARNING:
        return "xkbcommon: WARNING: ";
    case XKB_LOG_LEVEL_ERROR:
        return "xkbcommon: ERROR: ";
    case XKB_LOG_LEVEL_CRITICAL:
        return "xkbcommon: CRITICAL: ";
    default:
        return NULL;
    }
}

ATTR_PRINTF(3, 0) static void
default_log_fn(struct xkb_context *ctx, enum xkb_log_level level,
               const char *fmt, va_list args)
{
    const char *prefix = log_level_to_prefix(level);

    if (prefix)
        fprintf(stderr, "%s", prefix);
    vfprintf(stderr, fmt, args);
}

static enum xkb_log_level
log_level(const char *level) {
    char *endptr;
    enum xkb_log_level lvl;

    errno = 0;
    lvl = strtol(level, &endptr, 10);
    if (errno == 0 && (endptr[0] == '\0' || is_space(endptr[0])))
        return lvl;
    if (istreq_prefix("crit", level))
        return XKB_LOG_LEVEL_CRITICAL;
    if (istreq_prefix("err", level))
        return XKB_LOG_LEVEL_ERROR;
    if (istreq_prefix("warn", level))
        return XKB_LOG_LEVEL_WARNING;
    if (istreq_prefix("info", level))
        return XKB_LOG_LEVEL_INFO;
    if (istreq_prefix("debug", level) || istreq_prefix("dbg", level))
        return XKB_LOG_LEVEL_DEBUG;

    return XKB_LOG_LEVEL_ERROR;
}

static int
log_verbosity(const char *verbosity) {
    char *endptr;
    int v;

    errno = 0;
    v = strtol(verbosity, &endptr, 10);
    if (errno == 0)
        return v;

    return 0;
}

/**
 * Create a new context.
 */
XKB_EXPORT struct xkb_context *
xkb_context_new(enum xkb_context_flags flags)
{
    const char *env;
    struct xkb_context *ctx = calloc(1, sizeof(*ctx));

    if (!ctx)
        return NULL;

    ctx->refcnt = 1;
    ctx->log_fn = default_log_fn;
    ctx->log_level = XKB_LOG_LEVEL_ERROR;
    ctx->log_verbosity = 0;

    /* Environment overwrites defaults. */
    env = secure_getenv("XKB_LOG_LEVEL");
    if (env)
        xkb_context_set_log_level(ctx, log_level(env));

    env = secure_getenv("XKB_LOG_VERBOSITY");
    if (env)
        xkb_context_set_log_verbosity(ctx, log_verbosity(env));

    if (!(flags & XKB_CONTEXT_NO_DEFAULT_INCLUDES) &&
        !xkb_context_include_path_append_default(ctx)) {
        log_err(ctx, "failed to add default include path %s\n",
                DFLT_XKB_CONFIG_ROOT);
        xkb_context_unref(ctx);
        return NULL;
    }

    ctx->use_environment_names = !(flags & XKB_CONTEXT_NO_ENVIRONMENT_NAMES);

    ctx->atom_table = atom_table_new();
    if (!ctx->atom_table) {
        xkb_context_unref(ctx);
        return NULL;
    }

    return ctx;
}

XKB_EXPORT void
xkb_context_set_log_fn(struct xkb_context *ctx,
                       void (*log_fn)(struct xkb_context *ctx,
                                      enum xkb_log_level level,
                                      const char *fmt, va_list args))
{
    ctx->log_fn = (log_fn ? log_fn : default_log_fn);
}

XKB_EXPORT enum xkb_log_level
xkb_context_get_log_level(struct xkb_context *ctx)
{
    return ctx->log_level;
}

XKB_EXPORT void
xkb_context_set_log_level(struct xkb_context *ctx, enum xkb_log_level level)
{
    ctx->log_level = level;
}

XKB_EXPORT int
xkb_context_get_log_verbosity(struct xkb_context *ctx)
{
    return ctx->log_verbosity;
}

XKB_EXPORT void
xkb_context_set_log_verbosity(struct xkb_context *ctx, int verbosity)
{
    ctx->log_verbosity = verbosity;
}

XKB_EXPORT void *
xkb_context_get_user_data(struct xkb_context *ctx)
{
    if (ctx)
        return ctx->user_data;
    return NULL;
}

XKB_EXPORT void
xkb_context_set_user_data(struct xkb_context *ctx, void *user_data)
{
    ctx->user_data = user_data;
}