083582f8093c3793406d0eab4b148b6b49becd1b
[paraslash.git] / error.h
1 /*
2 * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file error.h list of error messages for all subsystems */
8
9 /** \cond */
10
11 /* list of all subsystems that use paraslash's error facility */
12 DEFINE_ERRLIST_OBJECT_ENUM;
13
14 /* these do not need error handling (yet) */
15 #define SERVER_ERRORS
16 #define CLIENT_ERRORS
17 #define WAV_ERRORS
18 #define COMPRESS_ERRORS
19 #define TIME_ERRORS
20 #define CLOSE_ON_FORK_ERRORS
21 #define DAEMON_ERRORS
22 #define ORTP_SEND_ERRORS
23 #define GUI_ERRORS
24 #define RINGBUFFER_ERRORS
25 #define SCORE_ERRORS
26 #define SHA1_ERRORS
27 #define RECV_ERRORS
28 #define AFH_COMMON_ERRORS
29
30 extern const char **para_errlist[];
31
32 #define FSCK_ERRORS \
33 PARA_ERROR(FSCK_SYNTAX, "fsck syntax error"), \
34 PARA_ERROR(RANGE_VIOLATION, "range violation detected, very bad"), \
35 PARA_ERROR(NOT_A_REGULAR_FILE, "not a regular file"), \
36
37
38 #define OSL_ERRORS \
39 PARA_ERROR(BAD_DB_DIR, "invalid database directory"), \
40 PARA_ERROR(NO_COLUMN_DESC, "missing column description"), \
41 PARA_ERROR(BAD_NAME, "invalid name for a column/table"), \
42 PARA_ERROR(BAD_STORAGE_TYPE, "invalid storage type"), \
43 PARA_ERROR(BAD_STORAGE_FLAGS, "invalid storage flags"), \
44 PARA_ERROR(NO_COLUMN_NAME, "missing column name"), \
45 PARA_ERROR(NO_COLUMNS, "at least one column required"), \
46 PARA_ERROR(BAD_COLUMN_NAME, "invalid name for a table column"), \
47 PARA_ERROR(NO_UNIQUE_RBTREE_COLUMN, "need at least one mapped column with OSL_UNIQE and OSL_RBTREE OSL"), \
48 PARA_ERROR(NO_RBTREE_COL, "at least one column needs an rbtree"), \
49 PARA_ERROR(DUPLICATE_COL_NAME, "column name given twice"), \
50 PARA_ERROR(BAD_STORAGE_SIZE, "invalid storage size"), \
51 PARA_ERROR(NO_COMPARE_FUNC, "missing compare function"), \
52 PARA_ERROR(BAD_DATA_SIZE, "wrong data size for fixed-size column"), \
53 PARA_ERROR(NOT_MAPPED, "file not mapped"), \
54 PARA_ERROR(ALREADY_MAPPED, "file already mapped"), \
55 PARA_ERROR(BAD_SIZE, "invalid size specified"), \
56 PARA_ERROR(TRUNC, "failed to truncate file"), \
57 PARA_ERROR(UNLINK, "failed to remove file"), \
58 PARA_ERROR(BAD_TABLE, "table not open"), \
59 PARA_ERROR(BAD_TABLE_DESC, "invalid table description"), \
60 PARA_ERROR(RB_KEY_EXISTS, "key already exists in rbtree"), \
61 PARA_ERROR(RB_KEY_NOT_FOUND, "key not found in rbtree"), \
62 PARA_ERROR(BAD_ROW_NUM, "invalid row number"), \
63 PARA_ERROR(INDEX_CORRUPTION, "index corruption detected"), \
64 PARA_ERROR(INVALID_OBJECT, "reference to invalid object"), \
65 PARA_ERROR(STAT, "can not stat file"), \
66 PARA_ERROR(FSTAT, "fstat error"), \
67 PARA_ERROR(RENAME, "rename failed"), \
68 PARA_ERROR(WRITE, "write error"), \
69 PARA_ERROR(LSEEK, "lseek error"), \
70 PARA_ERROR(BUSY, "table is busy"), \
71 PARA_ERROR(SHORT_TABLE, "table too short"), \
72 PARA_ERROR(NO_MAGIC, "missing table header magic"), \
73 PARA_ERROR(VERSION_MISMATCH, "table version not suppoerted"), \
74 PARA_ERROR(BAD_COLUMN_NUM, "invalid column number"), \
75 PARA_ERROR(BAD_TABLE_FLAGS, "invalid flags in table description"), \
76 PARA_ERROR(BAD_ROW, "invalid row"), \
77
78
79 #define RBTREE_ERRORS \
80
81
82 #define AFS_ERRORS \
83 PARA_ERROR(BAD_TABLE_NAME, "invalid table"), \
84 PARA_ERROR(INPUT_TOO_LARGE, "input too large for stdin command"), \
85 PARA_ERROR(AFS_SYNTAX, "afs syntax error"), \
86 PARA_ERROR(AFS_SIGNAL, "afs caught deadly signal"), \
87 PARA_ERROR(AFS_SOCKET, "afs socket not writable"), \
88 PARA_ERROR(AFS_PARENT_DIED, "fatal: server process terminated"), \
89 PARA_ERROR(AFS_SHORT_READ, "short read from afs socket"), \
90
91
92 #define MOOD_ERRORS \
93 PARA_ERROR(MOOD_SYNTAX, "mood syntax error"), \
94 PARA_ERROR(NO_MOOD, "no mood available"), \
95 PARA_ERROR(MOOD_LOADED, "mood loaded"), \
96 PARA_ERROR(NOT_ADMISSIBLE, "file is not admussible"), \
97
98
99 #define ATTRIBUTE_ERRORS \
100 PARA_ERROR(ATTR_SYNTAX, "attribute syntax error"), \
101 PARA_ERROR(NO_ATTRIBUTES, "no attributes defined yet"), \
102
103 #define BLOB_ERRORS \
104 PARA_ERROR(BLOB_SYNTAX, "blob syntax error"), \
105 PARA_ERROR(DUMMY_ROW, "attempted to access blob dummy object"), \
106
107
108 #define PLAYLIST_ERRORS \
109 PARA_ERROR(NO_PLAYLIST, "no valid playlist found"), \
110 PARA_ERROR(PLAYLIST_LOADED, ""), /* not really an error */ \
111 PARA_ERROR(PATH_FOUND, ""), /* not really an error */ \
112 PARA_ERROR(PLAYLIST_EMPTY, "attempted to load empty playlist"), \
113
114
115 #define AFT_ERRORS \
116 PARA_ERROR(BAD_AFSI, "invaid afs info"), \
117 PARA_ERROR(LOCALTIME, "localtime() failed"), \
118 PARA_ERROR(STRFTIME, "strftime() failed"), \
119 PARA_ERROR(BAD_PATH, "invalid path"), \
120 PARA_ERROR(BAD_SORT, "invalid sorting method"), \
121 PARA_ERROR(FNMATCH, "fnmatch error"), \
122 PARA_ERROR(NO_MATCH, "no matches"), \
123 PARA_ERROR(NO_AFHI, "audio format handler info required"), \
124 PARA_ERROR(AFT_SYNTAX, "audio file table syntax error"), \
125 PARA_ERROR(HASH_MISMATCH, "hash mismatch, consider re-add"), \
126
127
128 #define USER_LIST_ERRORS \
129 PARA_ERROR(USERLIST, "failed to open user list file"), \
130
131
132 #define OSX_WRITE_ERRORS \
133 PARA_ERROR(STREAM_FORMAT, "could not set stream format"), \
134 PARA_ERROR(ADD_CALLBACK, "can not add callback"), \
135 PARA_ERROR(OPEN_COMP, "OpenAComponent() error"), \
136 PARA_ERROR(UNIT_INIT, "AudioUnitInitialize() error"), \
137 PARA_ERROR(UNIT_START, "AudioUnitStart() error"), \
138 PARA_ERROR(DEFAULT_COMP, "can not find default audio output component"), \
139
140
141 #define AUDIOC_ERRORS \
142 PARA_ERROR(AUDIOC_SYNTAX, "audioc syntax error"), \
143 PARA_ERROR(AUDIOC_READ, "audioc read error"), \
144 PARA_ERROR(AUDIOC_WRITE, "audioc write error"), \
145 PARA_ERROR(AUDIOC_OVERRUN, "audioc buffer overrun"), \
146
147
148
149 #define CLIENT_COMMON_ERRORS \
150 PARA_ERROR(CLIENT_SYNTAX, "syntax error"), \
151 PARA_ERROR(INVALID_CHALLENGE, "did not receive valid challenge"), \
152 PARA_ERROR(NO_CONFIG, "config file not found"), \
153 PARA_ERROR(CLIENT_AUTH, "authentication failed"), \
154 PARA_ERROR(SERVER_EOF, "connection closed by para_server"), \
155 PARA_ERROR(INPUT_EOF, "end of input"), \
156 PARA_ERROR(HANDSHAKE_COMPLETE, ""), /* not really an error */ \
157
158
159 #define SCHED_ERRORS \
160 PARA_ERROR(TASK_KILLED, "task killed"), \
161 PARA_ERROR(NO_SUCH_TASK, "task not found"), \
162 PARA_ERROR(NOT_INITIALIZED, "scheduler not yet initialized"), \
163
164
165 #define STDIN_ERRORS \
166 PARA_ERROR(STDIN_READ, "failed to read from stdin"), \
167 PARA_ERROR(STDIN_EOF, "end of file"), \
168
169
170 #define STDOUT_ERRORS \
171 PARA_ERROR(STDOUT_WRITE, "failed to write to stdout"), \
172 PARA_ERROR(STDOUT_EOF, "end of file"), \
173
174
175 #define NET_ERRORS \
176 PARA_ERROR(CONNECT, "connect error"), \
177 PARA_ERROR(NAME_TOO_LONG, "name too long for struct sockaddr_un"), \
178 PARA_ERROR(CHMOD, "failed to set socket mode"), \
179 PARA_ERROR(SENDMSG, "sendmsg() failed"), \
180 PARA_ERROR(RECVMSG, "recvmsg() failed"), \
181 PARA_ERROR(SCM_CREDENTIALS, "did not receive SCM credentials"), \
182 PARA_ERROR(RECV_PATTERN, "did not receive expected pattern"), \
183
184
185 #define ORTP_RECV_ERRORS \
186 PARA_ERROR(MSG_TO_BUF, "failed to extract rtp packet"), \
187 PARA_ERROR(ORTP_SYNTAX, "ottp syntax error"), \
188 PARA_ERROR(TOO_MANY_BAD_CHUNKS, "too many consecutive bad chunks"), \
189 PARA_ERROR(INVALID_HEADER, "invalid header packet"), \
190 PARA_ERROR(OVERRUN, "outout buffer overrun"), \
191 PARA_ERROR(ORTP_RECV_EOF, "ortp_recv: end of file"), \
192
193
194 #define HTTP_RECV_ERRORS \
195 PARA_ERROR(HTTP_RECV_EOF, "http_recv: end of file"), \
196 PARA_ERROR(HTTP_RECV_OVERRUN, "http_recv: outout buffer overrun"), \
197
198 #define RECV_COMMON_ERRORS \
199 PARA_ERROR(RECV_SYNTAX, "recv syntax error"), \
200
201
202 #define AUDIOD_ERRORS \
203 PARA_ERROR(NO_MORE_SLOTS, "no more empty slots"), \
204 PARA_ERROR(MISSING_COLON, "syntax error: missing colon"), \
205 PARA_ERROR(UNSUPPORTED_AUDIO_FORMAT, "given audio format not supported"), \
206 PARA_ERROR(SIGNAL_CAUGHT, "caught signal"), \
207
208
209 #define AUDIOD_COMMAND_ERRORS \
210 PARA_ERROR(CLIENT_WRITE, "client write error"), \
211 PARA_ERROR(AUDIOD_SYNTAX, "syntax error"), \
212 PARA_ERROR(UCRED_PERM, "permission denied"), \
213 PARA_ERROR(INVALID_AUDIOD_CMD, "invalid command"), \
214
215
216 #define FILTER_CHAIN_ERRORS \
217 PARA_ERROR(UNSUPPORTED_FILTER, "given filter not supported"), \
218 PARA_ERROR(BAD_FILTER_OPTIONS, "invalid filter option given"), \
219 PARA_ERROR(FC_EOF, "filter chain: eof"), \
220
221
222 #define STAT_ERRORS \
223 PARA_ERROR(TOO_MANY_CLIENTS, "maximal number of stat clients exceeded"), \
224 PARA_ERROR(UNKNOWN_STAT_ITEM, "status item not recognized"), \
225
226
227 #define OGGDEC_ERRORS \
228 PARA_ERROR(OGGDEC_READ, "read from media returned an error"), \
229 PARA_ERROR(OGGDEC_NOTVORBIS, "bitstream is not vorbis data"), \
230 PARA_ERROR(OGGDEC_VERSION, "vorbis version mismatch"), \
231 PARA_ERROR(OGGDEC_BADHEADER, "invalid vorbis bitstream header"), \
232 PARA_ERROR(OGGDEC_FAULT, "bug or heap/stack corruption"), \
233 PARA_ERROR(OGGDEC_BADLINK, "invalid stream section or requested link corrupt"), \
234
235
236 #define GRAB_CLIENT_ERRORS \
237 PARA_ERROR(PEDANTIC_GRAB, "fd not ready and pedantic grab requested"), \
238 PARA_ERROR(GC_WRITE, "grab client write error"), \
239 PARA_ERROR(BAD_GC_SLOT, "invalid slot requested by grab client"), \
240 PARA_ERROR(BAD_GC_FILTER_NUM, "invalid filter number given"), \
241 PARA_ERROR(GC_SYNTAX, "grab client syntax error"), \
242 PARA_ERROR(GC_HELP_GIVEN, ""), /* not really an error */ \
243 PARA_ERROR(GC_VERSION_GIVEN, ""), /* not really an error */ \
244
245
246 #define MP3DEC_ERRORS \
247 PARA_ERROR(MAD_FRAME_DECODE, "mad frame decode error"), \
248 PARA_ERROR(MP3DEC_OVERRUN, "mp3 output buffer overrun"), \
249
250
251 #define FILTER_ERRORS \
252 PARA_ERROR(NO_FILTERS, "at least one filter must be given"), \
253 PARA_ERROR(FILTER_SYNTAX, "syntax error"), \
254
255
256 #define SIGNAL_ERRORS \
257 PARA_ERROR(SIGNAL_SIG_ERR, "signal() retured SIG_ERR"), \
258 PARA_ERROR(SIGNAL_READ, "read error from signal pipe"), \
259
260
261 #define STRING_ERRORS \
262 PARA_ERROR(MKSTEMP, "mkstemp error: unable to create tmp file"), \
263 PARA_ERROR(FCHMOD, "fchmod error: can not set mode"), \
264 PARA_ERROR(ATOI_OVERFLOW, "value too large"), \
265 PARA_ERROR(STRTOLL, "unknown strtoll error"), \
266 PARA_ERROR(ATOI_NO_DIGITS, "no digits found in string"), \
267 PARA_ERROR(ATOI_JUNK_AT_END, "further characters after number"), \
268
269
270 #define EXEC_ERRORS \
271 PARA_ERROR(DUP_PIPE, "exec error: can not create pipe"), \
272 PARA_ERROR(NULL_OPEN, "can not open /dev/null"), \
273
274
275 #define MP3_AFH_ERRORS \
276 PARA_ERROR(FRAME, "invalid mp3 frame"), \
277 PARA_ERROR(FRAME_LENGTH, "invalid frame length"), \
278 PARA_ERROR(MP3_INFO, "could not read mp3 info"), \
279 PARA_ERROR(HEADER_FREQ, "invalid header frequency"), \
280 PARA_ERROR(HEADER_BITRATE, "invalid header bitrate"), \
281
282
283 #define AAC_AFH_ERRORS \
284 PARA_ERROR(STSZ, "did not find stcz atom"), \
285 PARA_ERROR(MP4ASC, "audio spec config error"), \
286 PARA_ERROR(AAC_AFH_INIT, "failed to init aac decoder"), \
287
288
289 #define AAC_COMMON_ERRORS \
290 PARA_ERROR(ESDS, "did not find esds atom"), \
291 PARA_ERROR(STCO, "did not find stco atom"), \
292
293
294 #define OGG_AFH_ERRORS \
295 PARA_ERROR(OGG_READ, "ogg read error"), \
296 PARA_ERROR(SYNC_PAGEOUT, "ogg sync page-out error (no ogg file?)"), \
297 PARA_ERROR(STREAM_PAGEIN, "ogg stream page-in error (first page)"), \
298 PARA_ERROR(STREAM_PACKETOUT, "ogg stream packet-out error (first packet)"), \
299 PARA_ERROR(VORBIS, "vorbis synthesis header-in error (not vorbis?)"), \
300 PARA_ERROR(OGG_INFO, "ov_info error"), \
301 PARA_ERROR(OGG_VERSION, "unsupported ogg version"), \
302 PARA_ERROR(OGG_BAD_HEADER, "invalid ogg vorbis header"), \
303 PARA_ERROR(OGG_UNKNOWN_ERROR, "unknown ogg vorbis error"), \
304
305
306 #define VSS_ERRORS \
307 PARA_ERROR(BAD_AUDIO_FILE_SUFFIX, "unknown suffix"), \
308 PARA_ERROR(AUDIO_FORMAT, "audio format not recognized"), \
309 PARA_ERROR(CHUNK, "unable to get chunk"), \
310 PARA_ERROR(SHORT_AFS_READ, "short read from afs socket"), \
311 PARA_ERROR(NOFD, "did not receive open fd from afs"), \
312
313
314 #define CRYPT_ERRORS \
315 PARA_ERROR(PRIVATE_KEY, "can not read private key"), \
316 PARA_ERROR(PUBLIC_KEY, "can not read public key"), \
317 PARA_ERROR(RSA, "RSA error"), \
318 PARA_ERROR(ENCRYPT, "encrypt error"), \
319 PARA_ERROR(DECRYPT, "decrypt error"), \
320 PARA_ERROR(CHALLENGE, "failed to read challenge"), \
321
322
323 #define HTTP_SEND_ERRORS \
324 PARA_ERROR(WRITE_OK, "can not check whether fd is writable"), \
325 PARA_ERROR(SEND_QUEUED_CHUNK, "failed to send queued chunk"), \
326
327
328 #define COMMAND_ERRORS \
329 PARA_ERROR(COMMAND_SYNTAX, "syntax error in command"), \
330 PARA_ERROR(AUTH, "did not receive auth request"), \
331 PARA_ERROR(BAD_SELECTOR, "no such audio file selector"), \
332 PARA_ERROR(NO_AUDIO_FILE, "no audio file"), \
333 PARA_ERROR(BAD_CMD, "invalid command"), \
334 PARA_ERROR(PERM, "permission denied"), \
335 PARA_ERROR(LOCK, "lock error"), \
336 PARA_ERROR(SENDER_CMD, "command not supported by this sender"), \
337 PARA_ERROR(SERVER_CRASH, "para_server crashed -- can not live without it"), \
338 PARA_ERROR(BAD_USER, "you don't exist. Go away."), \
339
340
341 #define IPC_ERRORS \
342 PARA_ERROR(SEM_GET, "failed to create semaphore"), \
343 PARA_ERROR(SEM_REMOVE, "can not remove semaphore"), \
344 PARA_ERROR(SHM_GET, "failed to allocate shared memory area"), \
345 PARA_ERROR(SHM_DESTROY, "failed to destroy shared memory area"), \
346 PARA_ERROR(SHM_ATTACH, "can not attach shared memory area"), \
347 PARA_ERROR(SHM_DETACH, "can not detach shared memory area"), \
348
349
350 #define DCCP_ERRORS \
351 PARA_ERROR(DCCP_SOCKET, "can not create dccp socket"), \
352
353
354 #define DCCP_RECV_ERRORS \
355 PARA_ERROR(ADDR_INFO, "getaddrinfo error"), \
356 PARA_ERROR(DCCP_OVERRUN, "dccp output buffer buffer overrun"), \
357 PARA_ERROR(DCCP_CONNECT, "dccp connect error"), \
358 PARA_ERROR(DCCP_RECV_EOF, "dccp_recv: end of file"), \
359
360
361 #define DCCP_SEND_ERRORS \
362 PARA_ERROR(DCCP_BIND, "dccp bind error"), \
363 PARA_ERROR(DCCP_LISTEN, "dccp listen error"), \
364 PARA_ERROR(DCCP_WRITE, "dccp write error"), \
365
366
367 #define FD_ERRORS \
368 PARA_ERROR(FGETS, "fgets error"), \
369 PARA_ERROR(CHDIR, "failed to change directory"), \
370 PARA_ERROR(OPEN, "failed to open file"), \
371 PARA_ERROR(CHDIR_PERM, "insufficient permissions to chdir"), \
372 PARA_ERROR(EMPTY, "file empty"), \
373 PARA_ERROR(MMAP, "mmap error"), \
374 PARA_ERROR(MUNMAP, "munmap failed"), \
375
376
377 #define WRITE_ERRORS \
378 PARA_ERROR(WRITE_SYNTAX, "para_write syntax error"), \
379 PARA_ERROR(PREMATURE_END, "premature end of audio file"), \
380 PARA_ERROR(NO_WAV_HEADER, "wave header not found"), \
381 PARA_ERROR(WAV_HEADER_SUCCESS, "successfully read wave header"), \
382 PARA_ERROR(NO_DELAY, "no initial delay"), \
383 PARA_ERROR(DELAY_TIMEOUT, "initial delay timeout"), \
384
385
386 #define ALSA_WRITE_ERRORS \
387 PARA_ERROR(BROKEN_CONF, "Broken alsa configuration"), \
388 PARA_ERROR(ACCESS_TYPE, "alsa access type not available"), \
389 PARA_ERROR(SAMPLE_FORMAT, "sample format not available"), \
390 PARA_ERROR(CHANNEL_COUNT, "channels count not available"), \
391 PARA_ERROR(HW_PARAMS, "unable to install hw params"), \
392 PARA_ERROR(SW_PARAMS, "unable to install sw params"), \
393 PARA_ERROR(BAD_PERIOD, "can not use period equal to buffer size"), \
394 PARA_ERROR(GET_XFER, "unable to obtain xfer align"), \
395 PARA_ERROR(SET_XFER, "snd_pcm_sw_params_set_xfer_align() failed"), \
396 PARA_ERROR(ALSA_WRITE, "alsa write error"), \
397 PARA_ERROR(PCM_OPEN, "unable to open pcm"), \
398 PARA_ERROR(SND_PCM_INFO, "pcm info error"), \
399 PARA_ERROR(GET_BUFFER_TIME, "snd_pcm_hw_params_get_buffer_time_max() failed"), \
400 PARA_ERROR(SET_BUFFER_TIME, "snd_pcm_hw_params_set_buffer_time_near() failed"), \
401 PARA_ERROR(SET_RATE, "snd_pcm_hw_params_set_rate_near failed"), \
402 PARA_ERROR(START_THRESHOLD, "snd_pcm_sw_params_set_start_threshold() failed"), \
403 PARA_ERROR(STOP_THRESHOLD, "snd_pcm_sw_params_set_stop_threshold() failed"), \
404
405
406 #define FILE_WRITE_ERRORS \
407 PARA_ERROR(FW_WRITE, "file writer write error"), \
408 PARA_ERROR(FW_OPEN, "file writer: can not open output file"), \
409 PARA_ERROR(FW_NO_FILE, "task started without open file"), \
410
411
412 #define WRITE_COMMON_ERRORS \
413 PARA_ERROR(WRITE_COMMON_SYNTAX, "syntax error in write option"), \
414 PARA_ERROR(WNG_EOF, "wng: end of file"), \
415
416
417 #define AACDEC_ERRORS \
418 PARA_ERROR(AACDEC_INIT, "failed to init aac decoder"), \
419 PARA_ERROR(AAC_DECODE, "aac decode error"), \
420 PARA_ERROR(AAC_OVERRUN, "aac output buffer overrun"), \
421
422
423 #define CHUNK_QUEUE_ERRORS \
424 PARA_ERROR(QUEUE, "packet queue overrun"), \
425
426 /** \endcond */
427
428 /**
429 * the subsystem shift
430 *
431 * 255 error codes ought to be enough for every subsystem. Use the higher bits
432 * of the return value to encode the subsystem number
433 */
434 #define SS_SHIFT 8
435
436 /**
437 * compute the subsystem offset
438 *
439 * It is given by x * 2**8 where \a x is the subsystem number
440 */
441 #define SS_OFFSET(ss) (SS_ ## ss << SS_SHIFT)
442
443 /**
444 * make the enum of all errors of one subsystem
445 *
446 * As zero should not be an error, we define a dummy enum entry with value
447 * 2**ss. That lets the real errors start at 2**ss + 1.
448 */
449 #define SS_ENUM(ss) enum {\
450 E_ ## ss ## _DUMMY = SS_OFFSET(ss), \
451 ss ## _ERRORS}
452
453 /**
454 * determine the subsystem number from the error number
455 *
456 * Easy, it's just \a num / 2**8.
457 */
458 #define ERRNUM_TO_SS(num) ((num) >> SS_SHIFT)
459
460 /**
461 * determine the index of an error number
462 *
463 * Also easy: It's the lower 8 bits of num.
464 */
465 #define ERRNUM_TO_INDEX(num) (((1 << SS_SHIFT) - 1) & (num))
466
467 #define SYSTEM_ERROR_BIT 30
468
469 #define IS_SYSTEM_ERROR(num) (!!((num) & (1 << SYSTEM_ERROR_BIT)))
470
471 #define ERRNO_TO_PARA_ERROR(num) ((num) | (1 << SYSTEM_ERROR_BIT))
472
473 static inline int is_errno(int val, int _errno)
474 {
475 assert(val > 0 && _errno > 0);
476 return ERRNO_TO_PARA_ERROR(_errno) == val;
477 }
478
479 /**
480 * paraslash's version of strerror(3)
481 *
482 * expands to the error text of \a num (a string constant).
483 */
484 #define PARA_STRERROR(num) IS_SYSTEM_ERROR(num)? \
485 strerror((num) & ((1 << SYSTEM_ERROR_BIT) - 1)) : \
486 para_errlist[ERRNUM_TO_SS(num)] [ERRNUM_TO_INDEX(num)]
487
488 /**
489 * define the error list for one subsystem
490 #
491 * The first entry (index 0) is always the name of the subsystem
492 * Used by macros in config.h (generated by configure)
493 */
494 #define DEFINE_ERRLIST(ss) const char * ss ## _ERRLIST[] = {#ss, ss ## _ERRORS}
495
496 /**
497 * activate errors for one subsystem.
498 *
499 * Each executable needs only the error lists of those subssystems it is
500 * actually linked with. We always reserve space for NUM_SS char ** pointers,
501 * but only init those of the needed subsystems. This macro is used by macros
502 * in config.h (generated by configure).
503 */
504 #define PARA_ERRLIST(ss) [SS_ ## ss] = ss ## _ERRLIST
505
506 /**
507 * This is temporarily defined to expand to its first argument (prefixed by
508 * 'E_') and gets later redefined to expand to the error text only
509 */
510 #define PARA_ERROR(err, msg) E_ ## err
511 #include "error2.h"
512 #undef PARA_ERROR
513 /* rest of the world only sees the error text */
514 #define PARA_ERROR(err, msg) msg