Get rid of the "table" member in struct table_info.
[paraslash.git] / attribute.c
1 /*
2 * Copyright (C) 1997-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6 #include "para.h"
7 #include "error.h"
8 #include "afh.h"
9 #include "afs.h"
10 #include "string.h"
11 #include "net.h"
12
13 static void *attribute_table;
14 static int greatest_att_bitnum;
15
16 /** The columns of the attribute table. */
17 enum attribute_table_columns {
18 /** The bit number (0-63). */
19 ATTCOL_BITNUM,
20 /** The name of the attribute. */
21 ATTCOL_NAME,
22 /** Number of columns in this table. */
23 NUM_ATT_COLUMNS
24 };
25
26 static int char_compare(const struct osl_object *obj1, const struct osl_object *obj2)
27 {
28 const unsigned char *c1 = (const unsigned char*)obj1->data;
29 const unsigned char *c2 = (const unsigned char*)obj2->data;
30 if (*c1 > *c2)
31 return 1;
32 if (*c1 < *c2)
33 return -1;
34 return 0;
35 }
36
37 static struct osl_column_description att_cols[] = {
38 [ATTCOL_BITNUM] = {
39 .storage_type = OSL_MAPPED_STORAGE,
40 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
41 .name = "bitnum",
42 .compare_function = char_compare,
43 .data_size = 1
44 },
45 [ATTCOL_NAME] = {
46 .storage_type = OSL_MAPPED_STORAGE,
47 .storage_flags = OSL_RBTREE | OSL_UNIQUE,
48 .name = "name",
49 .compare_function = string_compare,
50 }
51 };
52
53 static struct osl_table_description attribute_table_desc = {
54 .name = "attributes",
55 .num_columns = NUM_ATT_COLUMNS,
56 .flags = 0,
57 .column_descriptions = att_cols
58 };
59
60 static void find_greatest_att_bitnum(void)
61 {
62 unsigned char c = 63;
63 do {
64 struct osl_row *row;
65 struct osl_object obj = {.data = &c, .size = 1};
66 if (osl_get_row(attribute_table, ATTCOL_BITNUM, &obj,
67 &row) >= 0) {
68 greatest_att_bitnum = c;
69 return;
70 }
71 } while (c--);
72 PARA_INFO_LOG("%s\n", "no attributes");
73 greatest_att_bitnum = -E_NO_ATTRIBUTES;
74 }
75
76 /**
77 * Retrieve the identifier (number) of an attribute.
78 *
79 * \param att_name The name of the attribute.
80 * \param bitnum Result pointer.
81 *
82 * \return Positive on success, negative on errors.
83 */
84 int get_attribute_bitnum_by_name(const char *att_name, unsigned char *bitnum)
85 {
86 struct osl_object obj = {.data = (char *)att_name,
87 .size = strlen(att_name) + 1};
88 struct osl_row *row;
89 int ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
90
91 if (ret < 0)
92 return ret;
93 ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM, &obj);
94 if (ret < 0)
95 return ret;
96 *bitnum = *(unsigned char *)obj.data;
97 return 1;
98 }
99
100 /** Whether "-a" was given for the lsatt command. */
101 #define LSATT_FLAG_ALPHA 1
102 /** Whether "-l" was given for the lsatt command. */
103 #define LSATT_FLAG_LONG 2
104
105 /** Data passed via osl_rbtree_loop(). */
106 struct private_lsatt_data {
107 /** The given flags for the lsatt command. */
108 unsigned flags;
109 /** The result buffer. */
110 struct para_buffer b;
111 };
112
113 static int print_attribute(struct osl_row *row, void *private_data)
114 {
115 struct private_lsatt_data *pld = private_data;
116 int ret;
117 struct osl_object name_obj, bitnum_obj;
118
119 ret = osl_get_object(attribute_table, row, ATTCOL_NAME, &name_obj);
120 if (ret < 0)
121 return ret;
122 if (!(pld->flags & LSATT_FLAG_LONG)) {
123 para_printf(&pld->b, "%s\n", (char *)name_obj.data);
124 return 1;
125 }
126 ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM, &bitnum_obj);
127 if (ret < 0)
128 return ret;
129 para_printf(&pld->b, "%u\t%s\n", *(unsigned char*)bitnum_obj.data,
130 (char *)name_obj.data);
131 return 1;
132 }
133
134 static int com_lsatt_callback(const struct osl_object *query,
135 struct osl_object *result)
136 {
137 struct private_lsatt_data pld = {.flags = *(uint32_t *) query->data};
138 int ret;
139
140 if (pld.flags & LSATT_FLAG_ALPHA)
141 ret = osl_rbtree_loop(attribute_table, ATTCOL_NAME,
142 &pld, print_attribute);
143 else
144 ret = osl_rbtree_loop(attribute_table, ATTCOL_BITNUM,
145 &pld, print_attribute);
146 result->data = pld.b.buf;
147 result->size = pld.b.size;
148 return ret;
149 }
150
151
152 int com_lsatt(int fd, int argc, char * const * const argv)
153 {
154 int ret, i;
155 uint32_t flags = 0;
156 struct osl_object query, result;
157
158 for (i = 1; i < argc; i++) {
159 const char *arg = argv[i];
160 if (arg[0] != '-')
161 break;
162 if (!strcmp(arg, "--")) {
163 i++;
164 break;
165 }
166 if (!strcmp(arg, "-a")) {
167 flags |= LSATT_FLAG_ALPHA;
168 continue;
169 }
170 if (!strcmp(arg, "-l")) {
171 flags |= LSATT_FLAG_LONG;
172 continue;
173 }
174 }
175 if (argc > i)
176 return -E_ATTR_SYNTAX;
177 query.data = &flags;
178 query.size = sizeof(flags);
179 ret = send_callback_request(com_lsatt_callback, &query, &result);
180 if (ret > 0) {
181 ret = send_buffer(fd, (char *)result.data);
182 free(result.data);
183 }
184 return ret;
185 }
186
187 static int com_setatt_callback(const struct osl_object *query,
188 __a_unused struct osl_object *result)
189 {
190 char *p;
191 uint64_t add_mask = 0, del_mask = 0;
192 int ret;
193 size_t len;
194 struct osl_object obj;
195 struct osl_row *row;
196
197 for (p = query->data; p < (char *)query->data + query->size; p += len + 1) {
198 char c;
199
200 len = strlen(p);
201 if (!*p)
202 return -E_ATTR_SYNTAX;
203 c = p[len - 1];
204 if (c != '+' && c != '-')
205 break;
206 p[len - 1] = '\0';
207 obj.data = p;
208 obj.size = len + 1;
209 ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
210 if (ret < 0)
211 return ret;
212 ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM,
213 &obj);
214 if (ret < 0)
215 return ret;
216 if (c == '+')
217 add_mask |= (1UL << *(unsigned char *)obj.data);
218 else
219 del_mask |= (1UL << *(unsigned char *)obj.data);
220 }
221 if (!add_mask && !del_mask)
222 return -E_ATTR_SYNTAX;
223 PARA_DEBUG_LOG("masks: %llx:%llx\n",(long long unsigned)add_mask,
224 (long long unsigned)del_mask);
225 for (; p < (char *)query->data + query->size; p += len + 1) { /* TODO: fnmatch */
226 struct afs_info old_afsi, new_afsi;
227 struct osl_row *aft_row;
228
229 len = strlen(p);
230 ret = aft_get_row_of_path(p, &aft_row);
231 if (ret < 0)
232 return ret;
233 ret = get_afsi_object_of_row(aft_row, &obj);
234 if (ret < 0)
235 return ret;
236 ret = load_afsi(&old_afsi, &obj);
237 if (ret < 0)
238 return ret;
239 new_afsi = old_afsi;
240 new_afsi.attributes |= add_mask;
241 new_afsi.attributes &= ~del_mask;
242 save_afsi(&new_afsi, &obj); /* in-place update */
243 // ret = mood_update_audio_file(aft_row, &old_afsi);
244 // if (ret < 0)
245 // return ret;
246 }
247 return 1;
248 }
249
250 int com_setatt(__a_unused int fd, int argc, char * const * const argv)
251 {
252 if (argc < 2)
253 return -E_ATTR_SYNTAX;
254 return send_standard_callback_request(argc - 1, argv + 1, com_setatt_callback,
255 NULL);
256 }
257
258 /* TODO: make it faster by only extracting the attribute member from afsi */
259 static int logical_and_attribute(struct osl_row *aft_row, void *attribute_ptr)
260 {
261 struct afs_info afsi;
262 uint64_t *att = attribute_ptr;
263 struct osl_object obj;
264 int ret = get_afsi_object_of_row(aft_row, &obj);
265 if (ret < 0)
266 return ret;
267 ret = load_afsi(&afsi, &obj);
268 if (ret < 0)
269 return ret;
270 afsi.attributes &= *att;
271 save_afsi(&afsi, &obj);
272 return 1;
273 }
274
275 static int com_addatt_callback(const struct osl_object *query,
276 __a_unused struct osl_object *result)
277 {
278 char *p = query->data;
279 uint64_t atts_added = 0;
280 int ret;
281
282 while (p < (char *)query->data + query->size) {
283 struct osl_object objs[NUM_ATT_COLUMNS];
284 struct osl_row *row;
285 unsigned char bitnum;
286
287 objs[ATTCOL_BITNUM].size = 1;
288 objs[ATTCOL_NAME].data = p;
289 objs[ATTCOL_NAME].size = strlen(p) + 1;
290 ret = osl_get_row(attribute_table, ATTCOL_NAME,
291 &objs[ATTCOL_NAME], &row); /* expected to fail */
292 if (ret >= 0)
293 return -E_ATTR_EXISTS;
294 if (ret != -E_RB_KEY_NOT_FOUND) /* error */
295 return ret;
296 /* find smallest non-used attribute */
297 for (bitnum = 0; bitnum < 64; bitnum++) {
298 objs[ATTCOL_BITNUM].data = &bitnum;
299 ret = osl_get_row(attribute_table, ATTCOL_BITNUM,
300 &objs[ATTCOL_BITNUM], &row);
301 if (ret == -E_RB_KEY_NOT_FOUND)
302 break; /* this bitnum is unused, use it */
303 if (ret < 0) /* error */
304 return ret;
305 /* this bit is already in use, try next bit */
306 }
307 if (bitnum == 64)
308 return -E_ATTR_TABLE_FULL;
309 ret = osl_add_row(attribute_table, objs);
310 if (ret < 0)
311 return ret;
312 greatest_att_bitnum = PARA_MAX(greatest_att_bitnum, bitnum);
313 atts_added |= 1 << bitnum;
314 p += strlen(p) + 1;
315 }
316 if (!atts_added)
317 return 1;
318 atts_added = ~atts_added;
319 ret = audio_file_loop(&atts_added, logical_and_attribute);
320 if (ret < 0)
321 return ret;
322 find_greatest_att_bitnum();
323 return reload_current_mood(); /* FIXME: mood_reload() returns an error */
324 }
325
326 int com_addatt(__a_unused int fd, int argc, char * const * const argv)
327 {
328 if (argc < 2)
329 return -E_ATTR_SYNTAX;
330 return send_standard_callback_request(argc - 1, argv + 1, com_addatt_callback,
331 NULL);
332 }
333
334 static int com_rmatt_callback(const struct osl_object *query,
335 __a_unused struct osl_object *result)
336 {
337 char *p = query->data;
338 int ret, atts_removed = 0;
339 while (p < (char *)query->data + query->size) {
340 struct osl_object obj = {
341 .data = p,
342 .size = strlen(p) + 1
343 };
344 struct osl_row *row;
345 ret = osl_get_row(attribute_table, ATTCOL_NAME,
346 &obj, &row);
347 if (ret < 0)
348 return ret;
349 ret = osl_del_row(attribute_table, row);
350 if (ret < 0)
351 return ret;
352 atts_removed++;
353 p += strlen(p) + 1;
354 }
355 find_greatest_att_bitnum();
356 if (!atts_removed)
357 return 1;
358 return reload_current_mood();
359 }
360
361 int com_rmatt(__a_unused int fd, int argc, char * const * const argv)
362 {
363 if (argc < 2)
364 return -E_ATTR_SYNTAX;
365 return send_standard_callback_request(argc - 1, argv + 1, com_rmatt_callback,
366 NULL);
367 }
368
369 /**
370 * Return a binary representation of the geiven attribute value.
371 *
372 * \param atts Pointer to the attribute value.
373 * \param buf Result.
374 *
375 * This function prints a string of at most 64 characters plus the terminating
376 * \p NULL character into \a buf which must be provided by the caller and at
377 * least 65 bytes long. The "x" character is used for set attributes and "-" is
378 * used for unset attributes.
379 *
380 * In practice, not all 64 attributes are defined. In this case, the function
381 * only prints \a N + 1 charaters where \a N is the greatest id of a defined
382 * attribute.
383 */
384 void get_attribute_bitmap(const uint64_t *atts, char *buf)
385 {
386 int i;
387 const uint64_t one = 1;
388
389 for (i = 0; i <= greatest_att_bitnum; i++)
390 buf[greatest_att_bitnum - i] = (*atts & (one << i))? 'x' : '-';
391 buf[i] = '\0';
392 }
393
394 /**
395 * Get a string containing the set attributes in text form.
396 *
397 * \param atts The attribute bitmap.
398 * \param delim The delimiter to separate matching attribute names.
399 * \param text Result pointer.
400 *
401 * \return Positive on success, negative on errors. If no attributes have
402 * been defined, \a *text is NULL.
403 */
404 int get_attribute_text(uint64_t *atts, const char *delim, char **text)
405 {
406 int i, ret;
407 const uint64_t one = 1;
408
409 *text = NULL;
410 if (greatest_att_bitnum < 0) /* no attributes available */
411 return 1;
412 for (i = 0; i <= greatest_att_bitnum; i++) {
413 unsigned char bn = i;
414 struct osl_object obj = {.data = &bn, .size = 1};
415 struct osl_row *row;
416
417 if (!(*atts & (one << i)))
418 continue;
419 ret = osl_get_row(attribute_table, ATTCOL_BITNUM, &obj, &row);
420 if (ret < 0)
421 goto err;
422 ret = osl_get_object(attribute_table, row, ATTCOL_NAME, &obj);
423 if (ret < 0)
424 goto err;
425 if (*text) {
426 char *tmp = make_message("%s%s%s", *text, delim, (char *)obj.data);
427 free(*text);
428 *text = tmp;
429 } else
430 *text = para_strdup(obj.data);
431 }
432 if (!*text) /* no attributes set */
433 *text = para_strdup("");
434 return 1;
435 err:
436 free(*text);
437 return ret;
438 }
439
440 /**
441 * Close the attribute table.
442 *
443 * \param flags Ususal flags that are passed to osl_close_table().
444 *
445 * \sa osl_close_table().
446 */
447 void attribute_shutdown(enum osl_close_flags flags)
448 {
449 osl_close_table(attribute_table, flags);
450 attribute_table = NULL;
451 }
452
453 /**
454 * Open the attribute table.
455 *
456 * \param ti Gets initialized by this function.
457 * \param db The database directory.
458 *
459 * \return Positive on success, negative on errors.
460 *
461 * \sa osl_open_table().
462 */
463 int attribute_init(struct table_info *ti, const char *db)
464 {
465 int ret;
466
467 attribute_table_desc.dir = db;
468 ti->desc = &attribute_table_desc;
469 ret = osl_open_table(ti->desc, attribute_table);
470 greatest_att_bitnum = -1; /* no atts available */
471 if (ret >= 0) {
472 find_greatest_att_bitnum();
473 return ret;
474 }
475 attribute_table = NULL;
476 if (ret == -E_NOENT)
477 return 1;
478 return ret;
479 }