attribute.c

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