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| 1 /* | |
| 2 ** 2006 June 7 | |
| 3 ** | |
| 4 ** The author disclaims copyright to this source code. In place of | |
| 5 ** a legal notice, here is a blessing: | |
| 6 ** | |
| 7 ** May you do good and not evil. | |
| 8 ** May you find forgiveness for yourself and forgive others. | |
| 9 ** May you share freely, never taking more than you give. | |
| 10 ** | |
| 11 ************************************************************************* | |
| 12 ** This file contains code used to dynamically load extensions into | |
| 13 ** the SQLite library. | |
| 14 */ | |
| 15 | |
| 16 #ifndef SQLITE_CORE | |
| 17 #define SQLITE_CORE 1 /* Disable the API redefinition in sqlite3ext.h */ | |
| 18 #endif | |
| 19 #include "sqlite3ext.h" | |
| 20 #include "sqliteInt.h" | |
| 21 #include <string.h> | |
| 22 | |
| 23 #ifndef SQLITE_OMIT_LOAD_EXTENSION | |
| 24 | |
| 25 /* | |
| 26 ** Some API routines are omitted when various features are | |
| 27 ** excluded from a build of SQLite. Substitute a NULL pointer | |
| 28 ** for any missing APIs. | |
| 29 */ | |
| 30 #ifndef SQLITE_ENABLE_COLUMN_METADATA | |
| 31 # define sqlite3_column_database_name 0 | |
| 32 # define sqlite3_column_database_name16 0 | |
| 33 # define sqlite3_column_table_name 0 | |
| 34 # define sqlite3_column_table_name16 0 | |
| 35 # define sqlite3_column_origin_name 0 | |
| 36 # define sqlite3_column_origin_name16 0 | |
| 37 # define sqlite3_table_column_metadata 0 | |
| 38 #endif | |
| 39 | |
| 40 #ifdef SQLITE_OMIT_AUTHORIZATION | |
| 41 # define sqlite3_set_authorizer 0 | |
| 42 #endif | |
| 43 | |
| 44 #ifdef SQLITE_OMIT_UTF16 | |
| 45 # define sqlite3_bind_text16 0 | |
| 46 # define sqlite3_collation_needed16 0 | |
| 47 # define sqlite3_column_decltype16 0 | |
| 48 # define sqlite3_column_name16 0 | |
| 49 # define sqlite3_column_text16 0 | |
| 50 # define sqlite3_complete16 0 | |
| 51 # define sqlite3_create_collation16 0 | |
| 52 # define sqlite3_create_function16 0 | |
| 53 # define sqlite3_errmsg16 0 | |
| 54 # define sqlite3_open16 0 | |
| 55 # define sqlite3_prepare16 0 | |
| 56 # define sqlite3_prepare16_v2 0 | |
| 57 # define sqlite3_result_error16 0 | |
| 58 # define sqlite3_result_text16 0 | |
| 59 # define sqlite3_result_text16be 0 | |
| 60 # define sqlite3_result_text16le 0 | |
| 61 # define sqlite3_value_text16 0 | |
| 62 # define sqlite3_value_text16be 0 | |
| 63 # define sqlite3_value_text16le 0 | |
| 64 # define sqlite3_column_database_name16 0 | |
| 65 # define sqlite3_column_table_name16 0 | |
| 66 # define sqlite3_column_origin_name16 0 | |
| 67 #endif | |
| 68 | |
| 69 #ifdef SQLITE_OMIT_COMPLETE | |
| 70 # define sqlite3_complete 0 | |
| 71 # define sqlite3_complete16 0 | |
| 72 #endif | |
| 73 | |
| 74 #ifdef SQLITE_OMIT_DECLTYPE | |
| 75 # define sqlite3_column_decltype16 0 | |
| 76 # define sqlite3_column_decltype 0 | |
| 77 #endif | |
| 78 | |
| 79 #ifdef SQLITE_OMIT_PROGRESS_CALLBACK | |
| 80 # define sqlite3_progress_handler 0 | |
| 81 #endif | |
| 82 | |
| 83 #ifdef SQLITE_OMIT_VIRTUALTABLE | |
| 84 # define sqlite3_create_module 0 | |
| 85 # define sqlite3_create_module_v2 0 | |
| 86 # define sqlite3_declare_vtab 0 | |
| 87 # define sqlite3_vtab_config 0 | |
| 88 # define sqlite3_vtab_on_conflict 0 | |
| 89 #endif | |
| 90 | |
| 91 #ifdef SQLITE_OMIT_SHARED_CACHE | |
| 92 # define sqlite3_enable_shared_cache 0 | |
| 93 #endif | |
| 94 | |
| 95 #ifdef SQLITE_OMIT_TRACE | |
| 96 # define sqlite3_profile 0 | |
| 97 # define sqlite3_trace 0 | |
| 98 #endif | |
| 99 | |
| 100 #ifdef SQLITE_OMIT_GET_TABLE | |
| 101 # define sqlite3_free_table 0 | |
| 102 # define sqlite3_get_table 0 | |
| 103 #endif | |
| 104 | |
| 105 #ifdef SQLITE_OMIT_INCRBLOB | |
| 106 #define sqlite3_bind_zeroblob 0 | |
| 107 #define sqlite3_blob_bytes 0 | |
| 108 #define sqlite3_blob_close 0 | |
| 109 #define sqlite3_blob_open 0 | |
| 110 #define sqlite3_blob_read 0 | |
| 111 #define sqlite3_blob_write 0 | |
| 112 #define sqlite3_blob_reopen 0 | |
| 113 #endif | |
| 114 | |
| 115 /* | |
| 116 ** The following structure contains pointers to all SQLite API routines. | |
| 117 ** A pointer to this structure is passed into extensions when they are | |
| 118 ** loaded so that the extension can make calls back into the SQLite | |
| 119 ** library. | |
| 120 ** | |
| 121 ** When adding new APIs, add them to the bottom of this structure | |
| 122 ** in order to preserve backwards compatibility. | |
| 123 ** | |
| 124 ** Extensions that use newer APIs should first call the | |
| 125 ** sqlite3_libversion_number() to make sure that the API they | |
| 126 ** intend to use is supported by the library. Extensions should | |
| 127 ** also check to make sure that the pointer to the function is | |
| 128 ** not NULL before calling it. | |
| 129 */ | |
| 130 static const sqlite3_api_routines sqlite3Apis = { | |
| 131 sqlite3_aggregate_context, | |
| 132 #ifndef SQLITE_OMIT_DEPRECATED | |
| 133 sqlite3_aggregate_count, | |
| 134 #else | |
| 135 0, | |
| 136 #endif | |
| 137 sqlite3_bind_blob, | |
| 138 sqlite3_bind_double, | |
| 139 sqlite3_bind_int, | |
| 140 sqlite3_bind_int64, | |
| 141 sqlite3_bind_null, | |
| 142 sqlite3_bind_parameter_count, | |
| 143 sqlite3_bind_parameter_index, | |
| 144 sqlite3_bind_parameter_name, | |
| 145 sqlite3_bind_text, | |
| 146 sqlite3_bind_text16, | |
| 147 sqlite3_bind_value, | |
| 148 sqlite3_busy_handler, | |
| 149 sqlite3_busy_timeout, | |
| 150 sqlite3_changes, | |
| 151 sqlite3_close, | |
| 152 sqlite3_collation_needed, | |
| 153 sqlite3_collation_needed16, | |
| 154 sqlite3_column_blob, | |
| 155 sqlite3_column_bytes, | |
| 156 sqlite3_column_bytes16, | |
| 157 sqlite3_column_count, | |
| 158 sqlite3_column_database_name, | |
| 159 sqlite3_column_database_name16, | |
| 160 sqlite3_column_decltype, | |
| 161 sqlite3_column_decltype16, | |
| 162 sqlite3_column_double, | |
| 163 sqlite3_column_int, | |
| 164 sqlite3_column_int64, | |
| 165 sqlite3_column_name, | |
| 166 sqlite3_column_name16, | |
| 167 sqlite3_column_origin_name, | |
| 168 sqlite3_column_origin_name16, | |
| 169 sqlite3_column_table_name, | |
| 170 sqlite3_column_table_name16, | |
| 171 sqlite3_column_text, | |
| 172 sqlite3_column_text16, | |
| 173 sqlite3_column_type, | |
| 174 sqlite3_column_value, | |
| 175 sqlite3_commit_hook, | |
| 176 sqlite3_complete, | |
| 177 sqlite3_complete16, | |
| 178 sqlite3_create_collation, | |
| 179 sqlite3_create_collation16, | |
| 180 sqlite3_create_function, | |
| 181 sqlite3_create_function16, | |
| 182 sqlite3_create_module, | |
| 183 sqlite3_data_count, | |
| 184 sqlite3_db_handle, | |
| 185 sqlite3_declare_vtab, | |
| 186 sqlite3_enable_shared_cache, | |
| 187 sqlite3_errcode, | |
| 188 sqlite3_errmsg, | |
| 189 sqlite3_errmsg16, | |
| 190 sqlite3_exec, | |
| 191 #ifndef SQLITE_OMIT_DEPRECATED | |
| 192 sqlite3_expired, | |
| 193 #else | |
| 194 0, | |
| 195 #endif | |
| 196 sqlite3_finalize, | |
| 197 sqlite3_free, | |
| 198 sqlite3_free_table, | |
| 199 sqlite3_get_autocommit, | |
| 200 sqlite3_get_auxdata, | |
| 201 sqlite3_get_table, | |
| 202 0, /* Was sqlite3_global_recover(), but that function is deprecated */ | |
| 203 sqlite3_interrupt, | |
| 204 sqlite3_last_insert_rowid, | |
| 205 sqlite3_libversion, | |
| 206 sqlite3_libversion_number, | |
| 207 sqlite3_malloc, | |
| 208 sqlite3_mprintf, | |
| 209 sqlite3_open, | |
| 210 sqlite3_open16, | |
| 211 sqlite3_prepare, | |
| 212 sqlite3_prepare16, | |
| 213 sqlite3_profile, | |
| 214 sqlite3_progress_handler, | |
| 215 sqlite3_realloc, | |
| 216 sqlite3_reset, | |
| 217 sqlite3_result_blob, | |
| 218 sqlite3_result_double, | |
| 219 sqlite3_result_error, | |
| 220 sqlite3_result_error16, | |
| 221 sqlite3_result_int, | |
| 222 sqlite3_result_int64, | |
| 223 sqlite3_result_null, | |
| 224 sqlite3_result_text, | |
| 225 sqlite3_result_text16, | |
| 226 sqlite3_result_text16be, | |
| 227 sqlite3_result_text16le, | |
| 228 sqlite3_result_value, | |
| 229 sqlite3_rollback_hook, | |
| 230 sqlite3_set_authorizer, | |
| 231 sqlite3_set_auxdata, | |
| 232 sqlite3_snprintf, | |
| 233 sqlite3_step, | |
| 234 sqlite3_table_column_metadata, | |
| 235 #ifndef SQLITE_OMIT_DEPRECATED | |
| 236 sqlite3_thread_cleanup, | |
| 237 #else | |
| 238 0, | |
| 239 #endif | |
| 240 sqlite3_total_changes, | |
| 241 sqlite3_trace, | |
| 242 #ifndef SQLITE_OMIT_DEPRECATED | |
| 243 sqlite3_transfer_bindings, | |
| 244 #else | |
| 245 0, | |
| 246 #endif | |
| 247 sqlite3_update_hook, | |
| 248 sqlite3_user_data, | |
| 249 sqlite3_value_blob, | |
| 250 sqlite3_value_bytes, | |
| 251 sqlite3_value_bytes16, | |
| 252 sqlite3_value_double, | |
| 253 sqlite3_value_int, | |
| 254 sqlite3_value_int64, | |
| 255 sqlite3_value_numeric_type, | |
| 256 sqlite3_value_text, | |
| 257 sqlite3_value_text16, | |
| 258 sqlite3_value_text16be, | |
| 259 sqlite3_value_text16le, | |
| 260 sqlite3_value_type, | |
| 261 sqlite3_vmprintf, | |
| 262 /* | |
| 263 ** The original API set ends here. All extensions can call any | |
| 264 ** of the APIs above provided that the pointer is not NULL. But | |
| 265 ** before calling APIs that follow, extension should check the | |
| 266 ** sqlite3_libversion_number() to make sure they are dealing with | |
| 267 ** a library that is new enough to support that API. | |
| 268 ************************************************************************* | |
| 269 */ | |
| 270 sqlite3_overload_function, | |
| 271 | |
| 272 /* | |
| 273 ** Added after 3.3.13 | |
| 274 */ | |
| 275 sqlite3_prepare_v2, | |
| 276 sqlite3_prepare16_v2, | |
| 277 sqlite3_clear_bindings, | |
| 278 | |
| 279 /* | |
| 280 ** Added for 3.4.1 | |
| 281 */ | |
| 282 sqlite3_create_module_v2, | |
| 283 | |
| 284 /* | |
| 285 ** Added for 3.5.0 | |
| 286 */ | |
| 287 sqlite3_bind_zeroblob, | |
| 288 sqlite3_blob_bytes, | |
| 289 sqlite3_blob_close, | |
| 290 sqlite3_blob_open, | |
| 291 sqlite3_blob_read, | |
| 292 sqlite3_blob_write, | |
| 293 sqlite3_create_collation_v2, | |
| 294 sqlite3_file_control, | |
| 295 sqlite3_memory_highwater, | |
| 296 sqlite3_memory_used, | |
| 297 #ifdef SQLITE_MUTEX_OMIT | |
| 298 0, | |
| 299 0, | |
| 300 0, | |
| 301 0, | |
| 302 0, | |
| 303 #else | |
| 304 sqlite3_mutex_alloc, | |
| 305 sqlite3_mutex_enter, | |
| 306 sqlite3_mutex_free, | |
| 307 sqlite3_mutex_leave, | |
| 308 sqlite3_mutex_try, | |
| 309 #endif | |
| 310 sqlite3_open_v2, | |
| 311 sqlite3_release_memory, | |
| 312 sqlite3_result_error_nomem, | |
| 313 sqlite3_result_error_toobig, | |
| 314 sqlite3_sleep, | |
| 315 sqlite3_soft_heap_limit, | |
| 316 sqlite3_vfs_find, | |
| 317 sqlite3_vfs_register, | |
| 318 sqlite3_vfs_unregister, | |
| 319 | |
| 320 /* | |
| 321 ** Added for 3.5.8 | |
| 322 */ | |
| 323 sqlite3_threadsafe, | |
| 324 sqlite3_result_zeroblob, | |
| 325 sqlite3_result_error_code, | |
| 326 sqlite3_test_control, | |
| 327 sqlite3_randomness, | |
| 328 sqlite3_context_db_handle, | |
| 329 | |
| 330 /* | |
| 331 ** Added for 3.6.0 | |
| 332 */ | |
| 333 sqlite3_extended_result_codes, | |
| 334 sqlite3_limit, | |
| 335 sqlite3_next_stmt, | |
| 336 sqlite3_sql, | |
| 337 sqlite3_status, | |
| 338 | |
| 339 /* | |
| 340 ** Added for 3.7.4 | |
| 341 */ | |
| 342 sqlite3_backup_finish, | |
| 343 sqlite3_backup_init, | |
| 344 sqlite3_backup_pagecount, | |
| 345 sqlite3_backup_remaining, | |
| 346 sqlite3_backup_step, | |
| 347 #ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS | |
| 348 sqlite3_compileoption_get, | |
| 349 sqlite3_compileoption_used, | |
| 350 #else | |
| 351 0, | |
| 352 0, | |
| 353 #endif | |
| 354 sqlite3_create_function_v2, | |
| 355 sqlite3_db_config, | |
| 356 sqlite3_db_mutex, | |
| 357 sqlite3_db_status, | |
| 358 sqlite3_extended_errcode, | |
| 359 sqlite3_log, | |
| 360 sqlite3_soft_heap_limit64, | |
| 361 sqlite3_sourceid, | |
| 362 sqlite3_stmt_status, | |
| 363 sqlite3_strnicmp, | |
| 364 #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY | |
| 365 sqlite3_unlock_notify, | |
| 366 #else | |
| 367 0, | |
| 368 #endif | |
| 369 #ifndef SQLITE_OMIT_WAL | |
| 370 sqlite3_wal_autocheckpoint, | |
| 371 sqlite3_wal_checkpoint, | |
| 372 sqlite3_wal_hook, | |
| 373 #else | |
| 374 0, | |
| 375 0, | |
| 376 0, | |
| 377 #endif | |
| 378 sqlite3_blob_reopen, | |
| 379 sqlite3_vtab_config, | |
| 380 sqlite3_vtab_on_conflict, | |
| 381 sqlite3_close_v2, | |
| 382 sqlite3_db_filename, | |
| 383 sqlite3_db_readonly, | |
| 384 sqlite3_db_release_memory, | |
| 385 sqlite3_errstr, | |
| 386 sqlite3_stmt_busy, | |
| 387 sqlite3_stmt_readonly, | |
| 388 sqlite3_stricmp, | |
| 389 sqlite3_uri_boolean, | |
| 390 sqlite3_uri_int64, | |
| 391 sqlite3_uri_parameter, | |
| 392 sqlite3_vsnprintf, | |
| 393 sqlite3_wal_checkpoint_v2, | |
| 394 /* Version 3.8.7 and later */ | |
| 395 sqlite3_auto_extension, | |
| 396 sqlite3_bind_blob64, | |
| 397 sqlite3_bind_text64, | |
| 398 sqlite3_cancel_auto_extension, | |
| 399 sqlite3_load_extension, | |
| 400 sqlite3_malloc64, | |
| 401 sqlite3_msize, | |
| 402 sqlite3_realloc64, | |
| 403 sqlite3_reset_auto_extension, | |
| 404 sqlite3_result_blob64, | |
| 405 sqlite3_result_text64, | |
| 406 sqlite3_strglob | |
| 407 }; | |
| 408 | |
| 409 /* | |
| 410 ** Attempt to load an SQLite extension library contained in the file | |
| 411 ** zFile. The entry point is zProc. zProc may be 0 in which case a | |
| 412 ** default entry point name (sqlite3_extension_init) is used. Use | |
| 413 ** of the default name is recommended. | |
| 414 ** | |
| 415 ** Return SQLITE_OK on success and SQLITE_ERROR if something goes wrong. | |
| 416 ** | |
| 417 ** If an error occurs and pzErrMsg is not 0, then fill *pzErrMsg with | |
| 418 ** error message text. The calling function should free this memory | |
| 419 ** by calling sqlite3DbFree(db, ). | |
| 420 */ | |
| 421 static int sqlite3LoadExtension( | |
| 422 sqlite3 *db, /* Load the extension into this database connection */ | |
| 423 const char *zFile, /* Name of the shared library containing extension */ | |
| 424 const char *zProc, /* Entry point. Use "sqlite3_extension_init" if 0 */ | |
| 425 char **pzErrMsg /* Put error message here if not 0 */ | |
| 426 ){ | |
| 427 sqlite3_vfs *pVfs = db->pVfs; | |
| 428 void *handle; | |
| 429 int (*xInit)(sqlite3*,char**,const sqlite3_api_routines*); | |
| 430 char *zErrmsg = 0; | |
| 431 const char *zEntry; | |
| 432 char *zAltEntry = 0; | |
| 433 void **aHandle; | |
| 434 int nMsg = 300 + sqlite3Strlen30(zFile); | |
| 435 int ii; | |
| 436 | |
| 437 /* Shared library endings to try if zFile cannot be loaded as written */ | |
| 438 static const char *azEndings[] = { | |
| 439 #if SQLITE_OS_WIN | |
| 440 "dll" | |
| 441 #elif defined(__APPLE__) | |
| 442 "dylib" | |
| 443 #else | |
| 444 "so" | |
| 445 #endif | |
| 446 }; | |
| 447 | |
| 448 | |
| 449 if( pzErrMsg ) *pzErrMsg = 0; | |
| 450 | |
| 451 /* Ticket #1863. To avoid a creating security problems for older | |
| 452 ** applications that relink against newer versions of SQLite, the | |
| 453 ** ability to run load_extension is turned off by default. One | |
| 454 ** must call sqlite3_enable_load_extension() to turn on extension | |
| 455 ** loading. Otherwise you get the following error. | |
| 456 */ | |
| 457 if( (db->flags & SQLITE_LoadExtension)==0 ){ | |
| 458 if( pzErrMsg ){ | |
| 459 *pzErrMsg = sqlite3_mprintf("not authorized"); | |
| 460 } | |
| 461 return SQLITE_ERROR; | |
| 462 } | |
| 463 | |
| 464 zEntry = zProc ? zProc : "sqlite3_extension_init"; | |
| 465 | |
| 466 handle = sqlite3OsDlOpen(pVfs, zFile); | |
| 467 #if SQLITE_OS_UNIX || SQLITE_OS_WIN | |
| 468 for(ii=0; ii<ArraySize(azEndings) && handle==0; ii++){ | |
| 469 char *zAltFile = sqlite3_mprintf("%s.%s", zFile, azEndings[ii]); | |
| 470 if( zAltFile==0 ) return SQLITE_NOMEM; | |
| 471 handle = sqlite3OsDlOpen(pVfs, zAltFile); | |
| 472 sqlite3_free(zAltFile); | |
| 473 } | |
| 474 #endif | |
| 475 if( handle==0 ){ | |
| 476 if( pzErrMsg ){ | |
| 477 *pzErrMsg = zErrmsg = sqlite3_malloc(nMsg); | |
| 478 if( zErrmsg ){ | |
| 479 sqlite3_snprintf(nMsg, zErrmsg, | |
| 480 "unable to open shared library [%s]", zFile); | |
| 481 sqlite3OsDlError(pVfs, nMsg-1, zErrmsg); | |
| 482 } | |
| 483 } | |
| 484 return SQLITE_ERROR; | |
| 485 } | |
| 486 xInit = (int(*)(sqlite3*,char**,const sqlite3_api_routines*)) | |
| 487 sqlite3OsDlSym(pVfs, handle, zEntry); | |
| 488 | |
| 489 /* If no entry point was specified and the default legacy | |
| 490 ** entry point name "sqlite3_extension_init" was not found, then | |
| 491 ** construct an entry point name "sqlite3_X_init" where the X is | |
| 492 ** replaced by the lowercase value of every ASCII alphabetic | |
| 493 ** character in the filename after the last "/" upto the first ".", | |
| 494 ** and eliding the first three characters if they are "lib". | |
| 495 ** Examples: | |
| 496 ** | |
| 497 ** /usr/local/lib/libExample5.4.3.so ==> sqlite3_example_init | |
| 498 ** C:/lib/mathfuncs.dll ==> sqlite3_mathfuncs_init | |
| 499 */ | |
| 500 if( xInit==0 && zProc==0 ){ | |
| 501 int iFile, iEntry, c; | |
| 502 int ncFile = sqlite3Strlen30(zFile); | |
| 503 zAltEntry = sqlite3_malloc(ncFile+30); | |
| 504 if( zAltEntry==0 ){ | |
| 505 sqlite3OsDlClose(pVfs, handle); | |
| 506 return SQLITE_NOMEM; | |
| 507 } | |
| 508 memcpy(zAltEntry, "sqlite3_", 8); | |
| 509 for(iFile=ncFile-1; iFile>=0 && zFile[iFile]!='/'; iFile--){} | |
| 510 iFile++; | |
| 511 if( sqlite3_strnicmp(zFile+iFile, "lib", 3)==0 ) iFile += 3; | |
| 512 for(iEntry=8; (c = zFile[iFile])!=0 && c!='.'; iFile++){ | |
| 513 if( sqlite3Isalpha(c) ){ | |
| 514 zAltEntry[iEntry++] = (char)sqlite3UpperToLower[(unsigned)c]; | |
| 515 } | |
| 516 } | |
| 517 memcpy(zAltEntry+iEntry, "_init", 6); | |
| 518 zEntry = zAltEntry; | |
| 519 xInit = (int(*)(sqlite3*,char**,const sqlite3_api_routines*)) | |
| 520 sqlite3OsDlSym(pVfs, handle, zEntry); | |
| 521 } | |
| 522 if( xInit==0 ){ | |
| 523 if( pzErrMsg ){ | |
| 524 nMsg += sqlite3Strlen30(zEntry); | |
| 525 *pzErrMsg = zErrmsg = sqlite3_malloc(nMsg); | |
| 526 if( zErrmsg ){ | |
| 527 sqlite3_snprintf(nMsg, zErrmsg, | |
| 528 "no entry point [%s] in shared library [%s]", zEntry, zFile); | |
| 529 sqlite3OsDlError(pVfs, nMsg-1, zErrmsg); | |
| 530 } | |
| 531 } | |
| 532 sqlite3OsDlClose(pVfs, handle); | |
| 533 sqlite3_free(zAltEntry); | |
| 534 return SQLITE_ERROR; | |
| 535 } | |
| 536 sqlite3_free(zAltEntry); | |
| 537 if( xInit(db, &zErrmsg, &sqlite3Apis) ){ | |
| 538 if( pzErrMsg ){ | |
| 539 *pzErrMsg = sqlite3_mprintf("error during initialization: %s", zErrmsg); | |
| 540 } | |
| 541 sqlite3_free(zErrmsg); | |
| 542 sqlite3OsDlClose(pVfs, handle); | |
| 543 return SQLITE_ERROR; | |
| 544 } | |
| 545 | |
| 546 /* Append the new shared library handle to the db->aExtension array. */ | |
| 547 aHandle = sqlite3DbMallocZero(db, sizeof(handle)*(db->nExtension+1)); | |
| 548 if( aHandle==0 ){ | |
| 549 return SQLITE_NOMEM; | |
| 550 } | |
| 551 if( db->nExtension>0 ){ | |
| 552 memcpy(aHandle, db->aExtension, sizeof(handle)*db->nExtension); | |
| 553 } | |
| 554 sqlite3DbFree(db, db->aExtension); | |
| 555 db->aExtension = aHandle; | |
| 556 | |
| 557 db->aExtension[db->nExtension++] = handle; | |
| 558 return SQLITE_OK; | |
| 559 } | |
| 560 int sqlite3_load_extension( | |
| 561 sqlite3 *db, /* Load the extension into this database connection */ | |
| 562 const char *zFile, /* Name of the shared library containing extension */ | |
| 563 const char *zProc, /* Entry point. Use "sqlite3_extension_init" if 0 */ | |
| 564 char **pzErrMsg /* Put error message here if not 0 */ | |
| 565 ){ | |
| 566 int rc; | |
| 567 sqlite3_mutex_enter(db->mutex); | |
| 568 rc = sqlite3LoadExtension(db, zFile, zProc, pzErrMsg); | |
| 569 rc = sqlite3ApiExit(db, rc); | |
| 570 sqlite3_mutex_leave(db->mutex); | |
| 571 return rc; | |
| 572 } | |
| 573 | |
| 574 /* | |
| 575 ** Call this routine when the database connection is closing in order | |
| 576 ** to clean up loaded extensions | |
| 577 */ | |
| 578 void sqlite3CloseExtensions(sqlite3 *db){ | |
| 579 int i; | |
| 580 assert( sqlite3_mutex_held(db->mutex) ); | |
| 581 for(i=0; i<db->nExtension; i++){ | |
| 582 sqlite3OsDlClose(db->pVfs, db->aExtension[i]); | |
| 583 } | |
| 584 sqlite3DbFree(db, db->aExtension); | |
| 585 } | |
| 586 | |
| 587 /* | |
| 588 ** Enable or disable extension loading. Extension loading is disabled by | |
| 589 ** default so as not to open security holes in older applications. | |
| 590 */ | |
| 591 int sqlite3_enable_load_extension(sqlite3 *db, int onoff){ | |
| 592 sqlite3_mutex_enter(db->mutex); | |
| 593 if( onoff ){ | |
| 594 db->flags |= SQLITE_LoadExtension; | |
| 595 }else{ | |
| 596 db->flags &= ~SQLITE_LoadExtension; | |
| 597 } | |
| 598 sqlite3_mutex_leave(db->mutex); | |
| 599 return SQLITE_OK; | |
| 600 } | |
| 601 | |
| 602 #endif /* SQLITE_OMIT_LOAD_EXTENSION */ | |
| 603 | |
| 604 /* | |
| 605 ** The auto-extension code added regardless of whether or not extension | |
| 606 ** loading is supported. We need a dummy sqlite3Apis pointer for that | |
| 607 ** code if regular extension loading is not available. This is that | |
| 608 ** dummy pointer. | |
| 609 */ | |
| 610 #ifdef SQLITE_OMIT_LOAD_EXTENSION | |
| 611 static const sqlite3_api_routines sqlite3Apis = { 0 }; | |
| 612 #endif | |
| 613 | |
| 614 | |
| 615 /* | |
| 616 ** The following object holds the list of automatically loaded | |
| 617 ** extensions. | |
| 618 ** | |
| 619 ** This list is shared across threads. The SQLITE_MUTEX_STATIC_MASTER | |
| 620 ** mutex must be held while accessing this list. | |
| 621 */ | |
| 622 typedef struct sqlite3AutoExtList sqlite3AutoExtList; | |
| 623 static SQLITE_WSD struct sqlite3AutoExtList { | |
| 624 int nExt; /* Number of entries in aExt[] */ | |
| 625 void (**aExt)(void); /* Pointers to the extension init functions */ | |
| 626 } sqlite3Autoext = { 0, 0 }; | |
| 627 | |
| 628 /* The "wsdAutoext" macro will resolve to the autoextension | |
| 629 ** state vector. If writable static data is unsupported on the target, | |
| 630 ** we have to locate the state vector at run-time. In the more common | |
| 631 ** case where writable static data is supported, wsdStat can refer directly | |
| 632 ** to the "sqlite3Autoext" state vector declared above. | |
| 633 */ | |
| 634 #ifdef SQLITE_OMIT_WSD | |
| 635 # define wsdAutoextInit \ | |
| 636 sqlite3AutoExtList *x = &GLOBAL(sqlite3AutoExtList,sqlite3Autoext) | |
| 637 # define wsdAutoext x[0] | |
| 638 #else | |
| 639 # define wsdAutoextInit | |
| 640 # define wsdAutoext sqlite3Autoext | |
| 641 #endif | |
| 642 | |
| 643 | |
| 644 /* | |
| 645 ** Register a statically linked extension that is automatically | |
| 646 ** loaded by every new database connection. | |
| 647 */ | |
| 648 int sqlite3_auto_extension(void (*xInit)(void)){ | |
| 649 int rc = SQLITE_OK; | |
| 650 #ifndef SQLITE_OMIT_AUTOINIT | |
| 651 rc = sqlite3_initialize(); | |
| 652 if( rc ){ | |
| 653 return rc; | |
| 654 }else | |
| 655 #endif | |
| 656 { | |
| 657 int i; | |
| 658 #if SQLITE_THREADSAFE | |
| 659 sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); | |
| 660 #endif | |
| 661 wsdAutoextInit; | |
| 662 sqlite3_mutex_enter(mutex); | |
| 663 for(i=0; i<wsdAutoext.nExt; i++){ | |
| 664 if( wsdAutoext.aExt[i]==xInit ) break; | |
| 665 } | |
| 666 if( i==wsdAutoext.nExt ){ | |
| 667 int nByte = (wsdAutoext.nExt+1)*sizeof(wsdAutoext.aExt[0]); | |
| 668 void (**aNew)(void); | |
| 669 aNew = sqlite3_realloc(wsdAutoext.aExt, nByte); | |
| 670 if( aNew==0 ){ | |
| 671 rc = SQLITE_NOMEM; | |
| 672 }else{ | |
| 673 wsdAutoext.aExt = aNew; | |
| 674 wsdAutoext.aExt[wsdAutoext.nExt] = xInit; | |
| 675 wsdAutoext.nExt++; | |
| 676 } | |
| 677 } | |
| 678 sqlite3_mutex_leave(mutex); | |
| 679 assert( (rc&0xff)==rc ); | |
| 680 return rc; | |
| 681 } | |
| 682 } | |
| 683 | |
| 684 /* | |
| 685 ** Cancel a prior call to sqlite3_auto_extension. Remove xInit from the | |
| 686 ** set of routines that is invoked for each new database connection, if it | |
| 687 ** is currently on the list. If xInit is not on the list, then this | |
| 688 ** routine is a no-op. | |
| 689 ** | |
| 690 ** Return 1 if xInit was found on the list and removed. Return 0 if xInit | |
| 691 ** was not on the list. | |
| 692 */ | |
| 693 int sqlite3_cancel_auto_extension(void (*xInit)(void)){ | |
| 694 #if SQLITE_THREADSAFE | |
| 695 sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); | |
| 696 #endif | |
| 697 int i; | |
| 698 int n = 0; | |
| 699 wsdAutoextInit; | |
| 700 sqlite3_mutex_enter(mutex); | |
| 701 for(i=wsdAutoext.nExt-1; i>=0; i--){ | |
| 702 if( wsdAutoext.aExt[i]==xInit ){ | |
| 703 wsdAutoext.nExt--; | |
| 704 wsdAutoext.aExt[i] = wsdAutoext.aExt[wsdAutoext.nExt]; | |
| 705 n++; | |
| 706 break; | |
| 707 } | |
| 708 } | |
| 709 sqlite3_mutex_leave(mutex); | |
| 710 return n; | |
| 711 } | |
| 712 | |
| 713 /* | |
| 714 ** Reset the automatic extension loading mechanism. | |
| 715 */ | |
| 716 void sqlite3_reset_auto_extension(void){ | |
| 717 #ifndef SQLITE_OMIT_AUTOINIT | |
| 718 if( sqlite3_initialize()==SQLITE_OK ) | |
| 719 #endif | |
| 720 { | |
| 721 #if SQLITE_THREADSAFE | |
| 722 sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); | |
| 723 #endif | |
| 724 wsdAutoextInit; | |
| 725 sqlite3_mutex_enter(mutex); | |
| 726 sqlite3_free(wsdAutoext.aExt); | |
| 727 wsdAutoext.aExt = 0; | |
| 728 wsdAutoext.nExt = 0; | |
| 729 sqlite3_mutex_leave(mutex); | |
| 730 } | |
| 731 } | |
| 732 | |
| 733 /* | |
| 734 ** Load all automatic extensions. | |
| 735 ** | |
| 736 ** If anything goes wrong, set an error in the database connection. | |
| 737 */ | |
| 738 void sqlite3AutoLoadExtensions(sqlite3 *db){ | |
| 739 int i; | |
| 740 int go = 1; | |
| 741 int rc; | |
| 742 int (*xInit)(sqlite3*,char**,const sqlite3_api_routines*); | |
| 743 | |
| 744 wsdAutoextInit; | |
| 745 if( wsdAutoext.nExt==0 ){ | |
| 746 /* Common case: early out without every having to acquire a mutex */ | |
| 747 return; | |
| 748 } | |
| 749 for(i=0; go; i++){ | |
| 750 char *zErrmsg; | |
| 751 #if SQLITE_THREADSAFE | |
| 752 sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); | |
| 753 #endif | |
| 754 sqlite3_mutex_enter(mutex); | |
| 755 if( i>=wsdAutoext.nExt ){ | |
| 756 xInit = 0; | |
| 757 go = 0; | |
| 758 }else{ | |
| 759 xInit = (int(*)(sqlite3*,char**,const sqlite3_api_routines*)) | |
| 760 wsdAutoext.aExt[i]; | |
| 761 } | |
| 762 sqlite3_mutex_leave(mutex); | |
| 763 zErrmsg = 0; | |
| 764 if( xInit && (rc = xInit(db, &zErrmsg, &sqlite3Apis))!=0 ){ | |
| 765 sqlite3ErrorWithMsg(db, rc, | |
| 766 "automatic extension loading failed: %s", zErrmsg); | |
| 767 go = 0; | |
| 768 } | |
| 769 sqlite3_free(zErrmsg); | |
| 770 } | |
| 771 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2363173002:
[sqlite] Remove obsolete reference version 3.8.7.4. (Closed)
