attribute.c

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