attribute.c

   1 #include "para.h"
   2 #include "error.h"
   3 #include "afh.h"
   4 #include "afs.h"
   5 #include "string.h"
   6 #include "net.h"
   7
   8 static void *attribute_table;
   9 static int greatest_att_bitnum;
  10
  11 static int char_compare(const struct osl_object *obj1, const struct osl_object *obj2)
  12 {
  13         const unsigned char *c1 = (const unsigned char*)obj1->data;
  14         const unsigned char *c2 = (const unsigned char*)obj2->data;
  15         if (*c1 > *c2)
  16                 return 1;
  17         if (*c1 < *c2)
  18                 return -1;
  19         return 0;
  20 }
  21
  22 enum attribute_table_columns {ATTCOL_BITNUM, ATTCOL_NAME, NUM_ATT_COLUMNS};
  23
  24 static struct osl_column_description att_cols[] = {
  25         [ATTCOL_BITNUM] = {
  26                 .storage_type = OSL_MAPPED_STORAGE,
  27                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
  28                 .name = "bitnum",
  29                 .compare_function = char_compare,
  30                 .data_size = 1
  31         },
  32         [ATTCOL_NAME] = {
  33                 .storage_type = OSL_MAPPED_STORAGE,
  34                 .storage_flags = OSL_RBTREE | OSL_UNIQUE,
  35                 .name = "name",
  36                 .compare_function = string_compare,
  37         }
  38 };
  39
  40 static const struct osl_table_description attribute_table_desc = {
  41         .dir = DATABASE_DIR,
  42         .name = "attributes",
  43         .num_columns = NUM_ATT_COLUMNS,
  44         .flags = 0,
  45         .column_descriptions = att_cols
  46 };
  47
  48 static void find_greatest_att_bitnum(void)
  49 {
  50         unsigned char c = 63;
  51         do {
  52                 struct osl_row *row;
  53                 struct osl_object obj = {.data = &c, .size = 1};
  54                 if (osl_get_row(attribute_table, ATTCOL_BITNUM, &obj,
  55                                 &row) >= 0) {
  56                         greatest_att_bitnum = c;
  57                         return;
  58                 }
  59         } while (c--);
  60         PARA_INFO_LOG("%s\n", "no attributes");
  61         greatest_att_bitnum = -E_NO_ATTRIBUTES;
  62 }
  63
  64 int get_attribute_bitnum_by_name(const char *att_name, unsigned char *bitnum)
  65 {
  66         struct osl_object obj = {.data = (char *)att_name,
  67                 .size = strlen(att_name) + 1};
  68         struct osl_row *row;
  69         int ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
  70
  71         if (ret < 0)
  72                 return ret;
  73         ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM, &obj);
  74         if (ret < 0)
  75                 return ret;
  76         *bitnum = *(unsigned char *)obj.data;
  77         return 1;
  78 }
  79
  80 #define LAA_FLAG_ALPHA 1
  81 #define LAA_FLAG_LONG 2
  82
  83 struct private_laa_data {
  84         int fd;
  85         unsigned flags;
  86 };
  87
  88 static int log_attribute(struct osl_row *row, void *private_data)
  89 {
  90         struct private_laa_data *pld = private_data;
  91         int ret;
  92         struct osl_object name_obj, bitnum_obj;
  93
  94         ret = osl_get_object(attribute_table, row, ATTCOL_NAME, &name_obj);
  95         if (ret < 0)
  96                 return ret;
  97         if (!(pld->flags & LAA_FLAG_LONG)) {
  98                 send_buffer(pld->fd, (char *)name_obj.data);
  99                 return 1;
 100         }
 101         ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM, &bitnum_obj);
 102         if (ret < 0)
 103                 return ret;
 104         send_va_buffer(pld->fd, "%u\t%s\n", *(unsigned char*)bitnum_obj.data,
 105                 (char *)name_obj.data);
 106         return 1;
 107 }
 108
 109 /* FIXME: Need callback */
 110 int com_lsatt(int fd, int argc, char * const * const argv)
 111 {
 112         struct private_laa_data pld = {.fd = fd, .flags = 0};
 113         int i;
 114
 115         for (i = 1; i < argc; i++) {
 116                 const char *arg = argv[i];
 117                 if (arg[0] != '-')
 118                         break;
 119                 if (!strcmp(arg, "--")) {
 120                         i++;
 121                         break;
 122                 }
 123                 if (!strcmp(arg, "-a")) {
 124                         pld.flags |= LAA_FLAG_ALPHA;
 125                         continue;
 126                 }
 127                 if (!strcmp(arg, "-l")) {
 128                         pld.flags |= LAA_FLAG_LONG;
 129                         continue;
 130                 }
 131         }
 132         if (argc > i)
 133                 return -E_ATTR_SYNTAX;
 134         if (pld.flags & LAA_FLAG_ALPHA)
 135                 return osl_rbtree_loop(attribute_table, ATTCOL_NAME,
 136                         &pld, log_attribute);
 137         return osl_rbtree_loop(attribute_table, ATTCOL_BITNUM,
 138                 &pld, log_attribute);
 139 }
 140
 141 static int com_setatt_callback(const struct osl_object *query,
 142                 __a_unused struct osl_object *result)
 143 {
 144         char *p;
 145         uint64_t add_mask = 0, del_mask = 0;
 146         int ret;
 147         size_t len;
 148         struct osl_object obj;
 149         struct osl_row *row;
 150
 151         for (p = query->data; p < (char *)query->data + query->size; p += len + 1) {
 152                 char c;
 153
 154                 len = strlen(p);
 155                 if (!*p)
 156                         return -E_ATTR_SYNTAX;
 157                 c = p[len - 1];
 158                 if (c != '+' && c != '-')
 159                         break;
 160                 p[len - 1] = '\0';
 161                 obj.data = p;
 162                 obj.size = len + 1;
 163                 ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
 164                 if (ret < 0)
 165                         return ret;
 166                 ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM,
 167                         &obj);
 168                 if (ret < 0)
 169                         return ret;
 170                 if (c == '+')
 171                         add_mask |= (1UL << *(unsigned char *)obj.data);
 172                 else
 173                         del_mask |= (1UL << *(unsigned char *)obj.data);
 174         }
 175         if (!add_mask && !del_mask)
 176                 return -E_ATTR_SYNTAX;
 177         PARA_DEBUG_LOG("masks: %llx:%llx\n",(long long unsigned)add_mask,
 178                 (long long unsigned)del_mask);
 179         for (; p < (char *)query->data + query->size; p += len + 1) { /* TODO: fnmatch */
 180                 struct afs_info old_afsi, new_afsi;
 181                 struct osl_row *aft_row;
 182
 183                 len = strlen(p);
 184                 ret = aft_get_row_of_path(p, &aft_row);
 185                 if (ret < 0)
 186                         return ret;
 187                 ret = get_afsi_object_of_row(p, &obj);
 188                 if (ret < 0)
 189                         return ret;
 190                 ret = load_afsi(&old_afsi, &obj);
 191                 if (ret < 0)
 192                         return ret;
 193                 new_afsi = old_afsi;
 194                 new_afsi.attributes |= add_mask;
 195                 new_afsi.attributes &= ~del_mask;
 196                 save_afsi(&new_afsi, &obj); /* in-place update */
 197                 ret = mood_update_audio_file(aft_row, &old_afsi);
 198                 if (ret < 0)
 199                         return ret;
 200         }
 201         return 1;
 202 }
 203
 204 int com_setatt(__a_unused int fd, int argc, char * const * const argv)
 205 {
 206         if (argc < 2)
 207                 return -E_ATTR_SYNTAX;
 208         return send_standard_callback_request(argc, argv, com_setatt_callback,
 209                 NULL);
 210 }
 211
 212 /* TODO: make it faster by only extracting the attribute member from afsi */
 213 static int logical_and_attribute(struct osl_row *aft_row, void *attribute_ptr)
 214 {
 215         struct afs_info afsi;
 216         uint64_t *att = attribute_ptr;
 217         struct osl_object obj;
 218         int ret = get_afsi_object_of_row(aft_row, &obj);
 219         if (ret < 0)
 220                 return ret;
 221         ret = load_afsi(&afsi, &obj);
 222         if (ret < 0)
 223                 return ret;
 224         afsi.attributes &= *att;
 225         save_afsi(&afsi, &obj);
 226         return 1;
 227 }
 228
 229 static int com_addatt_callback(const struct osl_object *query,
 230                 __a_unused struct osl_object *result)
 231 {
 232         char *p = query->data;
 233         uint64_t atts_added = 0;
 234         int ret;
 235
 236         while (p < (char *)query->data + query->size) {
 237                 struct osl_object objs[NUM_ATT_COLUMNS];
 238                 struct osl_row *row;
 239                 unsigned char bitnum;
 240
 241                 objs[ATTCOL_BITNUM].size = 1;
 242                 objs[ATTCOL_NAME].data = p;
 243                 objs[ATTCOL_NAME].size = strlen(p) + 1;
 244                 ret = osl_get_row(attribute_table, ATTCOL_NAME,
 245                         &objs[ATTCOL_NAME], &row); /* expected to fail */
 246                 if (ret >= 0)
 247                         return -E_ATTR_EXISTS;
 248                 if (ret != -E_RB_KEY_NOT_FOUND) /* error */
 249                         return ret;
 250                 /* find smallest non-used attribute */
 251                 for (bitnum = 0; bitnum < 64; bitnum++) {
 252                         objs[ATTCOL_BITNUM].data = &bitnum;
 253                         ret = osl_get_row(attribute_table, ATTCOL_BITNUM,
 254                                 &objs[ATTCOL_BITNUM], &row);
 255                         if (ret == -E_RB_KEY_NOT_FOUND)
 256                                 break; /* this bitnum is unused, use it */
 257                         if (ret < 0) /* error */
 258                                 return ret;
 259                         /* this bit is already in use, try next bit */
 260                 }
 261                 if (bitnum == 64)
 262                         return -E_ATTR_TABLE_FULL;
 263                 ret = osl_add_row(attribute_table, objs);
 264                 if (ret < 0)
 265                         return ret;
 266                 greatest_att_bitnum = PARA_MAX(greatest_att_bitnum, bitnum);
 267                 atts_added |= 1 << bitnum;
 268                 p += strlen(p) + 1;
 269         }
 270         if (!atts_added)
 271                 return 1;
 272         atts_added = ~atts_added;
 273         ret = audio_file_loop(&atts_added, logical_and_attribute);
 274         if (ret < 0)
 275                 return ret;
 276         find_greatest_att_bitnum();
 277         return mood_reload();
 278 }
 279
 280 int com_addatt(__a_unused int fd, int argc, char * const * const argv)
 281 {
 282         if (argc < 2)
 283                 return -E_ATTR_SYNTAX;
 284         return send_standard_callback_request(argc, argv, com_addatt_callback,
 285                 NULL);
 286 }
 287
 288 static int com_rmatt_callback(const struct osl_object *query,
 289                 __a_unused struct osl_object *result)
 290 {
 291         char *p = query->data;
 292         int ret, atts_removed = 0;
 293         while (p < (char *)query->data + query->size) {
 294                 struct osl_object obj = {
 295                         .data = p,
 296                         .size = strlen(p) + 1
 297                 };
 298                 struct osl_row *row;
 299                 ret = osl_get_row(attribute_table, ATTCOL_NAME,
 300                         &obj, &row);
 301                 if (ret < 0)
 302                         return ret;
 303                 ret = osl_del_row(attribute_table, row);
 304                 if (ret < 0)
 305                         return ret;
 306                 atts_removed++;
 307                 p += strlen(p) + 1;
 308         }
 309         find_greatest_att_bitnum();
 310         if (!atts_removed)
 311                 return 1;
 312         return mood_reload();
 313 }
 314
 315 int com_rmatt(__a_unused int fd, int argc, char * const * const argv)
 316 {
 317         if (argc < 2)
 318                 return -E_ATTR_SYNTAX;
 319         return send_standard_callback_request(argc, argv, com_rmatt_callback,
 320                 NULL);
 321 }
 322
 323 void get_attribute_bitmap(uint64_t *atts, char *buf)
 324 {
 325         int i;
 326         const uint64_t one = 1;
 327
 328         for (i = 0; i <= greatest_att_bitnum; i++)
 329                 buf[greatest_att_bitnum - i] = (*atts & (one << i))? 'x' : '-';
 330         buf[i] = '\0';
 331 }
 332 /**
 333  * Get a string containing the set attributes in text form.
 334  *
 335  * \param atts The attribute bitmap.
 336  * \param delim The delimiter to separate matching attribute names.
 337  * \param text Result pointer.
 338  *
 339  * \return Positive on success, negative on errors. If no attributes have
 340  * been defined, \a *text is NULL.
 341  */
 342 int get_attribute_text(uint64_t *atts, const char *delim, char **text)
 343 {
 344         int i, ret;
 345         const uint64_t one = 1;
 346
 347         *text = NULL;
 348         if (greatest_att_bitnum < 0) /* no attributes available */
 349                 return 1;
 350         for (i = 0; i <= greatest_att_bitnum; i++) {
 351                 unsigned char bn = i;
 352                 struct osl_object obj = {.data = &bn, .size = 1};
 353                 struct osl_row *row;
 354
 355                 if (!(*atts & (one << i)))
 356                         continue;
 357                 ret = osl_get_row(attribute_table, ATTCOL_BITNUM, &obj, &row);
 358                 if (ret < 0)
 359                         goto err;
 360                 ret = osl_get_object(attribute_table, row, ATTCOL_NAME, &obj);
 361                 if (ret < 0)
 362                         goto err;
 363                 if (*text) {
 364                         char *tmp = make_message("%s%s%s", *text, delim, (char *)obj.data);
 365                         free(*text);
 366                         *text = tmp;
 367                 } else
 368                         *text = para_strdup(obj.data);
 369         }
 370         if (!*text) /* no attributes set */
 371                 *text = para_strdup("");
 372         return 1;
 373 err:
 374         free(*text);
 375         return ret;
 376 }
 377
 378 void attribute_shutdown(enum osl_close_flags flags)
 379 {
 380         osl_close_table(attribute_table, flags);
 381 }
 382
 383 int attribute_init(struct table_info *ti)
 384 {
 385         int ret;
 386
 387         ti->desc = &attribute_table_desc;
 388         ret = osl_open_table(ti->desc, &ti->table);
 389         greatest_att_bitnum = -1; /* no atts available */
 390         if (ret >= 0) {
 391                 attribute_table = ti->table;
 392                 find_greatest_att_bitnum();
 393                 return ret;
 394         }
 395         attribute_table = NULL;
 396         if (ret == -E_NOENT)
 397                 return 1;
 398         return ret;
 399 }