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 struct osl_table_description attribute_table_desc = {
  41         .name = "attributes",
  42         .num_columns = NUM_ATT_COLUMNS,
  43         .flags = 0,
  44         .column_descriptions = att_cols
  45 };
  46
  47 static void find_greatest_att_bitnum(void)
  48 {
  49         unsigned char c = 63;
  50         do {
  51                 struct osl_row *row;
  52                 struct osl_object obj = {.data = &c, .size = 1};
  53                 if (osl_get_row(attribute_table, ATTCOL_BITNUM, &obj,
  54                                 &row) >= 0) {
  55                         greatest_att_bitnum = c;
  56                         return;
  57                 }
  58         } while (c--);
  59         PARA_INFO_LOG("%s\n", "no attributes");
  60         greatest_att_bitnum = -E_NO_ATTRIBUTES;
  61 }
  62
  63 int get_attribute_bitnum_by_name(const char *att_name, unsigned char *bitnum)
  64 {
  65         struct osl_object obj = {.data = (char *)att_name,
  66                 .size = strlen(att_name) + 1};
  67         struct osl_row *row;
  68         int ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
  69
  70         if (ret < 0)
  71                 return ret;
  72         ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM, &obj);
  73         if (ret < 0)
  74                 return ret;
  75         *bitnum = *(unsigned char *)obj.data;
  76         return 1;
  77 }
  78
  79 #define LAA_FLAG_ALPHA 1
  80 #define LAA_FLAG_LONG 2
  81
  82 struct private_laa_data {
  83         int fd;
  84         unsigned flags;
  85 };
  86
  87 static int log_attribute(struct osl_row *row, void *private_data)
  88 {
  89         struct private_laa_data *pld = private_data;
  90         int ret;
  91         struct osl_object name_obj, bitnum_obj;
  92
  93         ret = osl_get_object(attribute_table, row, ATTCOL_NAME, &name_obj);
  94         if (ret < 0)
  95                 return ret;
  96         if (!(pld->flags & LAA_FLAG_LONG)) {
  97                 send_buffer(pld->fd, (char *)name_obj.data);
  98                 return 1;
  99         }
 100         ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM, &bitnum_obj);
 101         if (ret < 0)
 102                 return ret;
 103         send_va_buffer(pld->fd, "%u\t%s\n", *(unsigned char*)bitnum_obj.data,
 104                 (char *)name_obj.data);
 105         return 1;
 106 }
 107
 108 /* FIXME: Need callback */
 109 int com_lsatt(int fd, int argc, char * const * const argv)
 110 {
 111         struct private_laa_data pld = {.fd = fd, .flags = 0};
 112         int i;
 113
 114         for (i = 1; i < argc; i++) {
 115                 const char *arg = argv[i];
 116                 if (arg[0] != '-')
 117                         break;
 118                 if (!strcmp(arg, "--")) {
 119                         i++;
 120                         break;
 121                 }
 122                 if (!strcmp(arg, "-a")) {
 123                         pld.flags |= LAA_FLAG_ALPHA;
 124                         continue;
 125                 }
 126                 if (!strcmp(arg, "-l")) {
 127                         pld.flags |= LAA_FLAG_LONG;
 128                         continue;
 129                 }
 130         }
 131         if (argc > i)
 132                 return -E_ATTR_SYNTAX;
 133         if (pld.flags & LAA_FLAG_ALPHA)
 134                 return osl_rbtree_loop(attribute_table, ATTCOL_NAME,
 135                         &pld, log_attribute);
 136         return osl_rbtree_loop(attribute_table, ATTCOL_BITNUM,
 137                 &pld, log_attribute);
 138 }
 139
 140 static int com_setatt_callback(const struct osl_object *query,
 141                 __a_unused struct osl_object *result)
 142 {
 143         char *p;
 144         uint64_t add_mask = 0, del_mask = 0;
 145         int ret;
 146         size_t len;
 147         struct osl_object obj;
 148         struct osl_row *row;
 149
 150         for (p = query->data; p < (char *)query->data + query->size; p += len + 1) {
 151                 char c;
 152
 153                 len = strlen(p);
 154                 if (!*p)
 155                         return -E_ATTR_SYNTAX;
 156                 c = p[len - 1];
 157                 if (c != '+' && c != '-')
 158                         break;
 159                 p[len - 1] = '\0';
 160                 obj.data = p;
 161                 obj.size = len + 1;
 162                 ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
 163                 if (ret < 0)
 164                         return ret;
 165                 ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM,
 166                         &obj);
 167                 if (ret < 0)
 168                         return ret;
 169                 if (c == '+')
 170                         add_mask |= (1UL << *(unsigned char *)obj.data);
 171                 else
 172                         del_mask |= (1UL << *(unsigned char *)obj.data);
 173         }
 174         if (!add_mask && !del_mask)
 175                 return -E_ATTR_SYNTAX;
 176         PARA_DEBUG_LOG("masks: %llx:%llx\n",(long long unsigned)add_mask,
 177                 (long long unsigned)del_mask);
 178         for (; p < (char *)query->data + query->size; p += len + 1) { /* TODO: fnmatch */
 179                 struct afs_info old_afsi, new_afsi;
 180                 struct osl_row *aft_row;
 181
 182                 len = strlen(p);
 183                 ret = aft_get_row_of_path(p, &aft_row);
 184                 if (ret < 0)
 185                         return ret;
 186                 ret = get_afsi_object_of_row(p, &obj);
 187                 if (ret < 0)
 188                         return ret;
 189                 ret = load_afsi(&old_afsi, &obj);
 190                 if (ret < 0)
 191                         return ret;
 192                 new_afsi = old_afsi;
 193                 new_afsi.attributes |= add_mask;
 194                 new_afsi.attributes &= ~del_mask;
 195                 save_afsi(&new_afsi, &obj); /* in-place update */
 196                 ret = mood_update_audio_file(aft_row, &old_afsi);
 197                 if (ret < 0)
 198                         return ret;
 199         }
 200         return 1;
 201 }
 202
 203 int com_setatt(__a_unused int fd, int argc, char * const * const argv)
 204 {
 205         if (argc < 2)
 206                 return -E_ATTR_SYNTAX;
 207         return send_standard_callback_request(argc, argv, com_setatt_callback,
 208                 NULL);
 209 }
 210
 211 /* TODO: make it faster by only extracting the attribute member from afsi */
 212 static int logical_and_attribute(struct osl_row *aft_row, void *attribute_ptr)
 213 {
 214         struct afs_info afsi;
 215         uint64_t *att = attribute_ptr;
 216         struct osl_object obj;
 217         int ret = get_afsi_object_of_row(aft_row, &obj);
 218         if (ret < 0)
 219                 return ret;
 220         ret = load_afsi(&afsi, &obj);
 221         if (ret < 0)
 222                 return ret;
 223         afsi.attributes &= *att;
 224         save_afsi(&afsi, &obj);
 225         return 1;
 226 }
 227
 228 static int com_addatt_callback(const struct osl_object *query,
 229                 __a_unused struct osl_object *result)
 230 {
 231         char *p = query->data;
 232         uint64_t atts_added = 0;
 233         int ret;
 234
 235         while (p < (char *)query->data + query->size) {
 236                 struct osl_object objs[NUM_ATT_COLUMNS];
 237                 struct osl_row *row;
 238                 unsigned char bitnum;
 239
 240                 objs[ATTCOL_BITNUM].size = 1;
 241                 objs[ATTCOL_NAME].data = p;
 242                 objs[ATTCOL_NAME].size = strlen(p) + 1;
 243                 ret = osl_get_row(attribute_table, ATTCOL_NAME,
 244                         &objs[ATTCOL_NAME], &row); /* expected to fail */
 245                 if (ret >= 0)
 246                         return -E_ATTR_EXISTS;
 247                 if (ret != -E_RB_KEY_NOT_FOUND) /* error */
 248                         return ret;
 249                 /* find smallest non-used attribute */
 250                 for (bitnum = 0; bitnum < 64; bitnum++) {
 251                         objs[ATTCOL_BITNUM].data = &bitnum;
 252                         ret = osl_get_row(attribute_table, ATTCOL_BITNUM,
 253                                 &objs[ATTCOL_BITNUM], &row);
 254                         if (ret == -E_RB_KEY_NOT_FOUND)
 255                                 break; /* this bitnum is unused, use it */
 256                         if (ret < 0) /* error */
 257                                 return ret;
 258                         /* this bit is already in use, try next bit */
 259                 }
 260                 if (bitnum == 64)
 261                         return -E_ATTR_TABLE_FULL;
 262                 ret = osl_add_row(attribute_table, objs);
 263                 if (ret < 0)
 264                         return ret;
 265                 greatest_att_bitnum = PARA_MAX(greatest_att_bitnum, bitnum);
 266                 atts_added |= 1 << bitnum;
 267                 p += strlen(p) + 1;
 268         }
 269         if (!atts_added)
 270                 return 1;
 271         atts_added = ~atts_added;
 272         ret = audio_file_loop(&atts_added, logical_and_attribute);
 273         if (ret < 0)
 274                 return ret;
 275         find_greatest_att_bitnum();
 276         return mood_reload();
 277 }
 278
 279 int com_addatt(__a_unused int fd, int argc, char * const * const argv)
 280 {
 281         if (argc < 2)
 282                 return -E_ATTR_SYNTAX;
 283         return send_standard_callback_request(argc, argv, com_addatt_callback,
 284                 NULL);
 285 }
 286
 287 static int com_rmatt_callback(const struct osl_object *query,
 288                 __a_unused struct osl_object *result)
 289 {
 290         char *p = query->data;
 291         int ret, atts_removed = 0;
 292         while (p < (char *)query->data + query->size) {
 293                 struct osl_object obj = {
 294                         .data = p,
 295                         .size = strlen(p) + 1
 296                 };
 297                 struct osl_row *row;
 298                 ret = osl_get_row(attribute_table, ATTCOL_NAME,
 299                         &obj, &row);
 300                 if (ret < 0)
 301                         return ret;
 302                 ret = osl_del_row(attribute_table, row);
 303                 if (ret < 0)
 304                         return ret;
 305                 atts_removed++;
 306                 p += strlen(p) + 1;
 307         }
 308         find_greatest_att_bitnum();
 309         if (!atts_removed)
 310                 return 1;
 311         return mood_reload();
 312 }
 313
 314 int com_rmatt(__a_unused int fd, int argc, char * const * const argv)
 315 {
 316         if (argc < 2)
 317                 return -E_ATTR_SYNTAX;
 318         return send_standard_callback_request(argc, argv, com_rmatt_callback,
 319                 NULL);
 320 }
 321
 322 void get_attribute_bitmap(uint64_t *atts, char *buf)
 323 {
 324         int i;
 325         const uint64_t one = 1;
 326
 327         for (i = 0; i <= greatest_att_bitnum; i++)
 328                 buf[greatest_att_bitnum - i] = (*atts & (one << i))? 'x' : '-';
 329         buf[i] = '\0';
 330 }
 331 /**
 332  * Get a string containing the set attributes in text form.
 333  *
 334  * \param atts The attribute bitmap.
 335  * \param delim The delimiter to separate matching attribute names.
 336  * \param text Result pointer.
 337  *
 338  * \return Positive on success, negative on errors. If no attributes have
 339  * been defined, \a *text is NULL.
 340  */
 341 int get_attribute_text(uint64_t *atts, const char *delim, char **text)
 342 {
 343         int i, ret;
 344         const uint64_t one = 1;
 345
 346         *text = NULL;
 347         if (greatest_att_bitnum < 0) /* no attributes available */
 348                 return 1;
 349         for (i = 0; i <= greatest_att_bitnum; i++) {
 350                 unsigned char bn = i;
 351                 struct osl_object obj = {.data = &bn, .size = 1};
 352                 struct osl_row *row;
 353
 354                 if (!(*atts & (one << i)))
 355                         continue;
 356                 ret = osl_get_row(attribute_table, ATTCOL_BITNUM, &obj, &row);
 357                 if (ret < 0)
 358                         goto err;
 359                 ret = osl_get_object(attribute_table, row, ATTCOL_NAME, &obj);
 360                 if (ret < 0)
 361                         goto err;
 362                 if (*text) {
 363                         char *tmp = make_message("%s%s%s", *text, delim, (char *)obj.data);
 364                         free(*text);
 365                         *text = tmp;
 366                 } else
 367                         *text = para_strdup(obj.data);
 368         }
 369         if (!*text) /* no attributes set */
 370                 *text = para_strdup("");
 371         return 1;
 372 err:
 373         free(*text);
 374         return ret;
 375 }
 376
 377 void attribute_shutdown(enum osl_close_flags flags)
 378 {
 379         osl_close_table(attribute_table, flags);
 380         attribute_table = NULL;
 381 }
 382
 383 int attribute_init(struct table_info *ti, const char *db)
 384 {
 385         int ret;
 386
 387         attribute_table_desc.dir = db;
 388         ti->desc = &attribute_table_desc;
 389         ret = osl_open_table(ti->desc, &ti->table);
 390         greatest_att_bitnum = -1; /* no atts available */
 391         if (ret >= 0) {
 392                 attribute_table = ti->table;
 393                 find_greatest_att_bitnum();
 394                 return ret;
 395         }
 396         attribute_table = NULL;
 397         if (ret == -E_NOENT)
 398                 return 1;
 399         return ret;
 400 }