summaryrefslogtreecommitdiff
path: root/xkbpath.c
blob: 68020129e4f74a06ff96f3de6674e35ec7245042 (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
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
/************************************************************
 Copyright (c) 1994 by Silicon Graphics Computer Systems, Inc.

 Permission to use, copy, modify, and distribute this
 software and its documentation for any purpose and without
 fee is hereby granted, provided that the above copyright
 notice appear in all copies and that both that copyright
 notice and this permission notice appear in supporting
 documentation, and that the name of Silicon Graphics not be 
 used in advertising or publicity pertaining to distribution 
 of the software without specific prior written permission.
 Silicon Graphics makes no representation about the suitability 
 of this software for any purpose. It is provided "as is"
 without any express or implied warranty.
 
 SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS 
 SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 
 AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
 GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL 
 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 
 DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 
 OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
 THE USE OR PERFORMANCE OF THIS SOFTWARE.

 ********************************************************/

#include <X11/Xlib.h>
#include <X11/XKBlib.h>

#define	DEBUG_VAR debugFlags
#include "utils.h"
#include <stdlib.h>
#include <X11/extensions/XKM.h>
#include "xkbpath.h"

#ifndef DFLT_XKB_CONFIG_ROOT
#define DFLT_XKB_CONFIG_ROOT	"/usr/lib/X11/xkb"
#endif

#ifndef PATH_MAX
#define	PATH_MAX 1024
#endif

#define	PATH_CHUNK	8       /* initial szPath */

static Bool noDefaultPath = False;
static int szPath;         /* number of entries allocated for includePath */
static int nPathEntries;   /* number of actual entries in includePath */
static char **includePath; /* Holds all directories we might be including data from */

/**
 * Extract the first token from an include statement.
 * @param str_inout Input statement, modified in-place. Can be passed in
 * repeatedly. If str_inout is NULL, the parsing has completed.
 * @param file_rtrn Set to the include file to be used.
 * @param map_rtrn Set to whatever comes after ), if any.
 * @param nextop_rtrn Set to the next operation in the complete statement.
 * @param extra_data Set to the string between ( and ), if any.
 *
 * @return True if parsing was succcessful, False for an illegal string.
 *
 * Example: "evdev+aliases(qwerty)"
 *      str_inout = aliases(qwerty)
 *      nextop_retrn = +
 *      extra_data = NULL
 *      file_rtrn = evdev
 *      map_rtrn = NULL
 *
 * 2nd run with "aliases(qwerty)"
 *      str_inout = NULL
 *      file_rtrn = aliases
 *      map_rtrn = qwerty
 *      extra_data = NULL
 *      nextop_retrn = ""
 *
 */
Bool
XkbParseIncludeMap(char **str_inout, char **file_rtrn, char **map_rtrn,
                   char *nextop_rtrn, char **extra_data)
{
    char *tmp, *str, *next;

    str = *str_inout;
    if ((*str == '+') || (*str == '|'))
    {
        *file_rtrn = *map_rtrn = NULL;
        *nextop_rtrn = *str;
        next = str + 1;
    }
    else if (*str == '%')
    {
        *file_rtrn = *map_rtrn = NULL;
        *nextop_rtrn = str[1];
        next = str + 2;
    }
    else
    {
        /* search for tokens inside the string */
        next = strpbrk(str, "|+");
        if (next)
        {
            /* set nextop_rtrn to \0, next to next character */
            *nextop_rtrn = *next;
            *next++ = '\0';
        }
        else
        {
            *nextop_rtrn = '\0';
            next = NULL;
        }
        /* search for :, store result in extra_data */
        tmp = strchr(str, ':');
        if (tmp != NULL)
        {
            *tmp++ = '\0';
            *extra_data = uStringDup(tmp);
        }
        else
        {
            *extra_data = NULL;
        }
        tmp = strchr(str, '(');
        if (tmp == NULL)
        {
            *file_rtrn = uStringDup(str);
            *map_rtrn = NULL;
        }
        else if (str[0] == '(')
        {
            uFree(*extra_data);
            return False;
        }
        else
        {
            *tmp++ = '\0';
            *file_rtrn = uStringDup(str);
            str = tmp;
            tmp = strchr(str, ')');
            if ((tmp == NULL) || (tmp[1] != '\0'))
            {
                uFree(*file_rtrn);
                uFree(*extra_data);
                return False;
            }
            *tmp++ = '\0';
            *map_rtrn = uStringDup(str);
        }
    }
    if (*nextop_rtrn == '\0')
        *str_inout = NULL;
    else if ((*nextop_rtrn == '|') || (*nextop_rtrn == '+'))
        *str_inout = next;
    else
        return False;
    return True;
}

/**
 * Init memory for include paths.
 */
Bool
XkbInitIncludePath(void)
{
    szPath = PATH_CHUNK;
    includePath = (char **) calloc(szPath, sizeof(char *));
    if (includePath == NULL)
        return False;
    return True;
}

void
XkbAddDefaultDirectoriesToPath(void)
{
    if (noDefaultPath)
        return;
    XkbAddDirectoryToPath(DFLT_XKB_CONFIG_ROOT);
}

/**
 * Remove all entries from the global includePath.
 */
void
XkbClearIncludePath(void)
{
    register int i;

    if (szPath > 0)
    {
        for (i = 0; i < nPathEntries; i++)
        {
            if (includePath[i] != NULL)
            {
                uFree(includePath[i]);
                includePath[i] = NULL;
            }
        }
        nPathEntries = 0;
    }
    noDefaultPath = True;
    return;
}

/**
 * Add the given path to the global includePath variable.
 * If dir is NULL, the includePath is emptied.
 */
Bool
XkbAddDirectoryToPath(const char *dir)
{
    int len;
    if ((dir == NULL) || (dir[0] == '\0'))
    {
        XkbClearIncludePath();
        return True;
    }
#ifdef __UNIXOS2__
    dir = (char *) __XOS2RedirRoot(dir);
#endif
    len = strlen(dir);
    if (len + 2 >= PATH_MAX)
    {                           /* allow for '/' and at least one character */
        ERROR2("Path entry (%s) too long (maxiumum length is %d)\n",
               dir, PATH_MAX - 3);
        return False;
    }
    if (nPathEntries >= szPath)
    {
        szPath += PATH_CHUNK;
        includePath = (char **) realloc(includePath, szPath * sizeof(char *));
        if (includePath == NULL)
        {
            WSGO("Allocation failed (includePath)\n");
            return False;
        }
    }
    includePath[nPathEntries] =
        (char *) calloc(strlen(dir) + 1, sizeof(char));
    if (includePath[nPathEntries] == NULL)
    {
        WSGO1("Allocation failed (includePath[%d])\n", nPathEntries);
        return False;
    }
    strcpy(includePath[nPathEntries++], dir);
    return True;
}

/***====================================================================***/

/**
 * Return the xkb directory based on the type.
 * Do not free the memory returned by this function.
 */
char *
XkbDirectoryForInclude(unsigned type)
{
    static char buf[32];

    switch (type)
    {
    case XkmSemanticsFile:
        strcpy(buf, "semantics");
        break;
    case XkmLayoutFile:
        strcpy(buf, "layout");
        break;
    case XkmKeymapFile:
        strcpy(buf, "keymap");
        break;
    case XkmKeyNamesIndex:
        strcpy(buf, "keycodes");
        break;
    case XkmTypesIndex:
        strcpy(buf, "types");
        break;
    case XkmSymbolsIndex:
        strcpy(buf, "symbols");
        break;
    case XkmCompatMapIndex:
        strcpy(buf, "compat");
        break;
    case XkmGeometryFile:
    case XkmGeometryIndex:
        strcpy(buf, "geometry");
        break;
    default:
        strcpy(buf, "");
        break;
    }
    return buf;
}

/***====================================================================***/

typedef struct _FileCacheEntry
{
    char *name;
    unsigned type;
    char *path;
    void *data;
    struct _FileCacheEntry *next;
} FileCacheEntry;
static FileCacheEntry *fileCache;

/**
 * Add the file with the given name to the internal cache to avoid opening and
 * parsing the file multiple times. If a cache entry for the same name + type
 * is already present, the entry is overwritten and the data belonging to the
 * previous entry is returned.
 *
 * @parameter name The name of the file (e.g. evdev).
 * @parameter type Type of the file (XkbTypesIdx, ... or XkbSemanticsFile, ...)
 * @parameter path The full path to the file.
 * @parameter data Already parsed data.
 *
 * @return The data from the overwritten file or NULL.
 */
void *
XkbAddFileToCache(char *name, unsigned type, char *path, void *data)
{
    FileCacheEntry *entry;

    for (entry = fileCache; entry != NULL; entry = entry->next)
    {
        if ((type == entry->type) && (uStringEqual(name, entry->name)))
        {
            void *old = entry->data;
            WSGO2("Replacing file cache entry (%s/%d)\n", name, type);
            entry->path = path;
            entry->data = data;
            return old;
        }
    }
    entry = uTypedAlloc(FileCacheEntry);
    if (entry != NULL)
    {
        entry->name = name;
        entry->type = type;
        entry->path = path;
        entry->data = data;
        entry->next = fileCache;
        fileCache = entry;
    }
    return NULL;
}

/**
 * Search for the given name + type in the cache.
 *
 * @parameter name The name of the file (e.g. evdev).
 * @parameter type Type of the file (XkbTypesIdx, ... or XkbSemanticsFile, ...)
 * @parameter pathRtrn Set to the full path of the given entry.
 *
 * @return the data from the cache entry or NULL if no matching entry was found.
 */
void *
XkbFindFileInCache(char *name, unsigned type, char **pathRtrn)
{
    FileCacheEntry *entry;

    for (entry = fileCache; entry != NULL; entry = entry->next)
    {
        if ((type == entry->type) && (uStringEqual(name, entry->name)))
        {
            *pathRtrn = entry->path;
            return entry->data;
        }
    }
    return NULL;
}

/***====================================================================***/

/**
 * Search for the given file name in the include directories.
 *
 * @param type one of XkbTypesIndex, XkbCompatMapIndex, ..., or
 * XkbSemanticsFile, XkmKeymapFile, ...
 * @param pathReturn is set to the full path of the file if found.
 *
 * @return an FD to the file or NULL. If NULL is returned, the value of
 * pathRtrn is undefined.
 */
FILE *
XkbFindFileInPath(char *name, unsigned type, char **pathRtrn)
{
    register int i;
    FILE *file = NULL;
    int nameLen, typeLen, pathLen;
    char buf[PATH_MAX], *typeDir;

    typeDir = XkbDirectoryForInclude(type);
    nameLen = strlen(name);
    typeLen = strlen(typeDir);
    for (i = 0; i < nPathEntries; i++)
    {
        pathLen = strlen(includePath[i]);
        if (typeLen < 1)
            continue;

        if ((nameLen + typeLen + pathLen + 2) >= PATH_MAX)
        {
            ERROR3("File name (%s/%s/%s) too long\n", includePath[i],
                   typeDir, name);
            ACTION("Ignored\n");
            continue;
        }
        snprintf(buf, sizeof(buf), "%s/%s/%s", includePath[i], typeDir, name);
        file = fopen(buf, "r");
        if (file != NULL)
            break;
    }

    if ((file != NULL) && (pathRtrn != NULL))
    {
        *pathRtrn = (char *) calloc(strlen(buf) + 1, sizeof(char));
        if (*pathRtrn != NULL)
            strcpy(*pathRtrn, buf);
    }
    return file;
}