| /* |
| ** 2006 June 7 |
| ** |
| ** The author disclaims copyright to this source code. In place of |
| ** a legal notice, here is a blessing: |
| ** |
| ** May you do good and not evil. |
| ** May you find forgiveness for yourself and forgive others. |
| ** May you share freely, never taking more than you give. |
| ** |
| ************************************************************************* |
| ** This file contains code used to dynamically load extensions into |
| ** the SQLite library. |
| */ |
| |
| #ifndef SQLITE_CORE |
| #define SQLITE_CORE 1 /* Disable the API redefinition in sqlite3ext.h */ |
| #endif |
| #include "sqlite3ext.h" |
| #include "sqliteInt.h" |
| |
| #ifndef SQLITE_OMIT_LOAD_EXTENSION |
| /* |
| ** Some API routines are omitted when various features are |
| ** excluded from a build of SQLite. Substitute a NULL pointer |
| ** for any missing APIs. |
| */ |
| #ifndef SQLITE_ENABLE_COLUMN_METADATA |
| # define sqlite3_column_database_name 0 |
| # define sqlite3_column_database_name16 0 |
| # define sqlite3_column_table_name 0 |
| # define sqlite3_column_table_name16 0 |
| # define sqlite3_column_origin_name 0 |
| # define sqlite3_column_origin_name16 0 |
| #endif |
| |
| #ifdef SQLITE_OMIT_AUTHORIZATION |
| # define sqlite3_set_authorizer 0 |
| #endif |
| |
| #ifdef SQLITE_OMIT_UTF16 |
| # define sqlite3_bind_text16 0 |
| # define sqlite3_collation_needed16 0 |
| # define sqlite3_column_decltype16 0 |
| # define sqlite3_column_name16 0 |
| # define sqlite3_column_text16 0 |
| # define sqlite3_complete16 0 |
| # define sqlite3_create_collation16 0 |
| # define sqlite3_create_function16 0 |
| # define sqlite3_errmsg16 0 |
| # define sqlite3_open16 0 |
| # define sqlite3_prepare16 0 |
| # define sqlite3_prepare16_v2 0 |
| # define sqlite3_prepare16_v3 0 |
| # define sqlite3_result_error16 0 |
| # define sqlite3_result_text16 0 |
| # define sqlite3_result_text16be 0 |
| # define sqlite3_result_text16le 0 |
| # define sqlite3_value_text16 0 |
| # define sqlite3_value_text16be 0 |
| # define sqlite3_value_text16le 0 |
| # define sqlite3_column_database_name16 0 |
| # define sqlite3_column_table_name16 0 |
| # define sqlite3_column_origin_name16 0 |
| #endif |
| |
| #ifdef SQLITE_OMIT_COMPLETE |
| # define sqlite3_complete 0 |
| # define sqlite3_complete16 0 |
| #endif |
| |
| #ifdef SQLITE_OMIT_DECLTYPE |
| # define sqlite3_column_decltype16 0 |
| # define sqlite3_column_decltype 0 |
| #endif |
| |
| #ifdef SQLITE_OMIT_PROGRESS_CALLBACK |
| # define sqlite3_progress_handler 0 |
| #endif |
| |
| #ifdef SQLITE_OMIT_VIRTUALTABLE |
| # define sqlite3_create_module 0 |
| # define sqlite3_create_module_v2 0 |
| # define sqlite3_declare_vtab 0 |
| # define sqlite3_vtab_config 0 |
| # define sqlite3_vtab_on_conflict 0 |
| #endif |
| |
| #ifdef SQLITE_OMIT_SHARED_CACHE |
| # define sqlite3_enable_shared_cache 0 |
| #endif |
| |
| #if defined(SQLITE_OMIT_TRACE) || defined(SQLITE_OMIT_DEPRECATED) |
| # define sqlite3_profile 0 |
| # define sqlite3_trace 0 |
| #endif |
| |
| #ifdef SQLITE_OMIT_GET_TABLE |
| # define sqlite3_free_table 0 |
| # define sqlite3_get_table 0 |
| #endif |
| |
| #ifdef SQLITE_OMIT_INCRBLOB |
| #define sqlite3_bind_zeroblob 0 |
| #define sqlite3_blob_bytes 0 |
| #define sqlite3_blob_close 0 |
| #define sqlite3_blob_open 0 |
| #define sqlite3_blob_read 0 |
| #define sqlite3_blob_write 0 |
| #define sqlite3_blob_reopen 0 |
| #endif |
| |
| #if defined(SQLITE_OMIT_TRACE) |
| # define sqlite3_trace_v2 0 |
| #endif |
| |
| /* |
| ** The following structure contains pointers to all SQLite API routines. |
| ** A pointer to this structure is passed into extensions when they are |
| ** loaded so that the extension can make calls back into the SQLite |
| ** library. |
| ** |
| ** When adding new APIs, add them to the bottom of this structure |
| ** in order to preserve backwards compatibility. |
| ** |
| ** Extensions that use newer APIs should first call the |
| ** sqlite3_libversion_number() to make sure that the API they |
| ** intend to use is supported by the library. Extensions should |
| ** also check to make sure that the pointer to the function is |
| ** not NULL before calling it. |
| */ |
| static const sqlite3_api_routines sqlite3Apis = { |
| sqlite3_aggregate_context, |
| #ifndef SQLITE_OMIT_DEPRECATED |
| sqlite3_aggregate_count, |
| #else |
| 0, |
| #endif |
| sqlite3_bind_blob, |
| sqlite3_bind_double, |
| sqlite3_bind_int, |
| sqlite3_bind_int64, |
| sqlite3_bind_null, |
| sqlite3_bind_parameter_count, |
| sqlite3_bind_parameter_index, |
| sqlite3_bind_parameter_name, |
| sqlite3_bind_text, |
| sqlite3_bind_text16, |
| sqlite3_bind_value, |
| sqlite3_busy_handler, |
| sqlite3_busy_timeout, |
| sqlite3_changes, |
| sqlite3_close, |
| sqlite3_collation_needed, |
| sqlite3_collation_needed16, |
| sqlite3_column_blob, |
| sqlite3_column_bytes, |
| sqlite3_column_bytes16, |
| sqlite3_column_count, |
| sqlite3_column_database_name, |
| sqlite3_column_database_name16, |
| sqlite3_column_decltype, |
| sqlite3_column_decltype16, |
| sqlite3_column_double, |
| sqlite3_column_int, |
| sqlite3_column_int64, |
| sqlite3_column_name, |
| sqlite3_column_name16, |
| sqlite3_column_origin_name, |
| sqlite3_column_origin_name16, |
| sqlite3_column_table_name, |
| sqlite3_column_table_name16, |
| sqlite3_column_text, |
| sqlite3_column_text16, |
| sqlite3_column_type, |
| sqlite3_column_value, |
| sqlite3_commit_hook, |
| sqlite3_complete, |
| sqlite3_complete16, |
| sqlite3_create_collation, |
| sqlite3_create_collation16, |
| sqlite3_create_function, |
| sqlite3_create_function16, |
| sqlite3_create_module, |
| sqlite3_data_count, |
| sqlite3_db_handle, |
| sqlite3_declare_vtab, |
| sqlite3_enable_shared_cache, |
| sqlite3_errcode, |
| sqlite3_errmsg, |
| sqlite3_errmsg16, |
| sqlite3_exec, |
| #ifndef SQLITE_OMIT_DEPRECATED |
| sqlite3_expired, |
| #else |
| 0, |
| #endif |
| sqlite3_finalize, |
| sqlite3_free, |
| sqlite3_free_table, |
| sqlite3_get_autocommit, |
| sqlite3_get_auxdata, |
| sqlite3_get_table, |
| 0, /* Was sqlite3_global_recover(), but that function is deprecated */ |
| sqlite3_interrupt, |
| sqlite3_last_insert_rowid, |
| sqlite3_libversion, |
| sqlite3_libversion_number, |
| sqlite3_malloc, |
| sqlite3_mprintf, |
| sqlite3_open, |
| sqlite3_open16, |
| sqlite3_prepare, |
| sqlite3_prepare16, |
| sqlite3_profile, |
| sqlite3_progress_handler, |
| sqlite3_realloc, |
| sqlite3_reset, |
| sqlite3_result_blob, |
| sqlite3_result_double, |
| sqlite3_result_error, |
| sqlite3_result_error16, |
| sqlite3_result_int, |
| sqlite3_result_int64, |
| sqlite3_result_null, |
| sqlite3_result_text, |
| sqlite3_result_text16, |
| sqlite3_result_text16be, |
| sqlite3_result_text16le, |
| sqlite3_result_value, |
| sqlite3_rollback_hook, |
| sqlite3_set_authorizer, |
| sqlite3_set_auxdata, |
| sqlite3_snprintf, |
| sqlite3_step, |
| sqlite3_table_column_metadata, |
| #ifndef SQLITE_OMIT_DEPRECATED |
| sqlite3_thread_cleanup, |
| #else |
| 0, |
| #endif |
| sqlite3_total_changes, |
| sqlite3_trace, |
| #ifndef SQLITE_OMIT_DEPRECATED |
| sqlite3_transfer_bindings, |
| #else |
| 0, |
| #endif |
| sqlite3_update_hook, |
| sqlite3_user_data, |
| sqlite3_value_blob, |
| sqlite3_value_bytes, |
| sqlite3_value_bytes16, |
| sqlite3_value_double, |
| sqlite3_value_int, |
| sqlite3_value_int64, |
| sqlite3_value_numeric_type, |
| sqlite3_value_text, |
| sqlite3_value_text16, |
| sqlite3_value_text16be, |
| sqlite3_value_text16le, |
| sqlite3_value_type, |
| sqlite3_vmprintf, |
| /* |
| ** The original API set ends here. All extensions can call any |
| ** of the APIs above provided that the pointer is not NULL. But |
| ** before calling APIs that follow, extension should check the |
| ** sqlite3_libversion_number() to make sure they are dealing with |
| ** a library that is new enough to support that API. |
| ************************************************************************* |
| */ |
| sqlite3_overload_function, |
| |
| /* |
| ** Added after 3.3.13 |
| */ |
| sqlite3_prepare_v2, |
| sqlite3_prepare16_v2, |
| sqlite3_clear_bindings, |
| |
| /* |
| ** Added for 3.4.1 |
| */ |
| sqlite3_create_module_v2, |
| |
| /* |
| ** Added for 3.5.0 |
| */ |
| sqlite3_bind_zeroblob, |
| sqlite3_blob_bytes, |
| sqlite3_blob_close, |
| sqlite3_blob_open, |
| sqlite3_blob_read, |
| sqlite3_blob_write, |
| sqlite3_create_collation_v2, |
| sqlite3_file_control, |
| sqlite3_memory_highwater, |
| sqlite3_memory_used, |
| #ifdef SQLITE_MUTEX_OMIT |
| 0, |
| 0, |
| 0, |
| 0, |
| 0, |
| #else |
| sqlite3_mutex_alloc, |
| sqlite3_mutex_enter, |
| sqlite3_mutex_free, |
| sqlite3_mutex_leave, |
| sqlite3_mutex_try, |
| #endif |
| sqlite3_open_v2, |
| sqlite3_release_memory, |
| sqlite3_result_error_nomem, |
| sqlite3_result_error_toobig, |
| sqlite3_sleep, |
| sqlite3_soft_heap_limit, |
| sqlite3_vfs_find, |
| sqlite3_vfs_register, |
| sqlite3_vfs_unregister, |
| |
| /* |
| ** Added for 3.5.8 |
| */ |
| sqlite3_threadsafe, |
| sqlite3_result_zeroblob, |
| sqlite3_result_error_code, |
| sqlite3_test_control, |
| sqlite3_randomness, |
| sqlite3_context_db_handle, |
| |
| /* |
| ** Added for 3.6.0 |
| */ |
| sqlite3_extended_result_codes, |
| sqlite3_limit, |
| sqlite3_next_stmt, |
| sqlite3_sql, |
| sqlite3_status, |
| |
| /* |
| ** Added for 3.7.4 |
| */ |
| sqlite3_backup_finish, |
| sqlite3_backup_init, |
| sqlite3_backup_pagecount, |
| sqlite3_backup_remaining, |
| sqlite3_backup_step, |
| #ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS |
| sqlite3_compileoption_get, |
| sqlite3_compileoption_used, |
| #else |
| 0, |
| 0, |
| #endif |
| sqlite3_create_function_v2, |
| sqlite3_db_config, |
| sqlite3_db_mutex, |
| sqlite3_db_status, |
| sqlite3_extended_errcode, |
| sqlite3_log, |
| sqlite3_soft_heap_limit64, |
| sqlite3_sourceid, |
| sqlite3_stmt_status, |
| sqlite3_strnicmp, |
| #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY |
| sqlite3_unlock_notify, |
| #else |
| 0, |
| #endif |
| #ifndef SQLITE_OMIT_WAL |
| sqlite3_wal_autocheckpoint, |
| sqlite3_wal_checkpoint, |
| sqlite3_wal_hook, |
| #else |
| 0, |
| 0, |
| 0, |
| #endif |
| sqlite3_blob_reopen, |
| sqlite3_vtab_config, |
| sqlite3_vtab_on_conflict, |
| sqlite3_close_v2, |
| sqlite3_db_filename, |
| sqlite3_db_readonly, |
| sqlite3_db_release_memory, |
| sqlite3_errstr, |
| sqlite3_stmt_busy, |
| sqlite3_stmt_readonly, |
| sqlite3_stricmp, |
| sqlite3_uri_boolean, |
| sqlite3_uri_int64, |
| sqlite3_uri_parameter, |
| sqlite3_vsnprintf, |
| sqlite3_wal_checkpoint_v2, |
| /* Version 3.8.7 and later */ |
| sqlite3_auto_extension, |
| sqlite3_bind_blob64, |
| sqlite3_bind_text64, |
| sqlite3_cancel_auto_extension, |
| sqlite3_load_extension, |
| sqlite3_malloc64, |
| sqlite3_msize, |
| sqlite3_realloc64, |
| sqlite3_reset_auto_extension, |
| sqlite3_result_blob64, |
| sqlite3_result_text64, |
| sqlite3_strglob, |
| /* Version 3.8.11 and later */ |
| (sqlite3_value*(*)(const sqlite3_value*))sqlite3_value_dup, |
| sqlite3_value_free, |
| sqlite3_result_zeroblob64, |
| sqlite3_bind_zeroblob64, |
| /* Version 3.9.0 and later */ |
| sqlite3_value_subtype, |
| sqlite3_result_subtype, |
| /* Version 3.10.0 and later */ |
| sqlite3_status64, |
| sqlite3_strlike, |
| sqlite3_db_cacheflush, |
| /* Version 3.12.0 and later */ |
| sqlite3_system_errno, |
| /* Version 3.14.0 and later */ |
| sqlite3_trace_v2, |
| sqlite3_expanded_sql, |
| /* Version 3.18.0 and later */ |
| sqlite3_set_last_insert_rowid, |
| /* Version 3.20.0 and later */ |
| sqlite3_prepare_v3, |
| sqlite3_prepare16_v3, |
| sqlite3_bind_pointer, |
| sqlite3_result_pointer, |
| sqlite3_value_pointer |
| }; |
| |
| /* |
| ** Attempt to load an SQLite extension library contained in the file |
| ** zFile. The entry point is zProc. zProc may be 0 in which case a |
| ** default entry point name (sqlite3_extension_init) is used. Use |
| ** of the default name is recommended. |
| ** |
| ** Return SQLITE_OK on success and SQLITE_ERROR if something goes wrong. |
| ** |
| ** If an error occurs and pzErrMsg is not 0, then fill *pzErrMsg with |
| ** error message text. The calling function should free this memory |
| ** by calling sqlite3DbFree(db, ). |
| */ |
| static int sqlite3LoadExtension( |
| sqlite3 *db, /* Load the extension into this database connection */ |
| const char *zFile, /* Name of the shared library containing extension */ |
| const char *zProc, /* Entry point. Use "sqlite3_extension_init" if 0 */ |
| char **pzErrMsg /* Put error message here if not 0 */ |
| ){ |
| sqlite3_vfs *pVfs = db->pVfs; |
| void *handle; |
| sqlite3_loadext_entry xInit; |
| char *zErrmsg = 0; |
| const char *zEntry; |
| char *zAltEntry = 0; |
| void **aHandle; |
| u64 nMsg = 300 + sqlite3Strlen30(zFile); |
| int ii; |
| int rc; |
| |
| /* Shared library endings to try if zFile cannot be loaded as written */ |
| static const char *azEndings[] = { |
| #if SQLITE_OS_WIN |
| "dll" |
| #elif defined(__APPLE__) |
| "dylib" |
| #else |
| "so" |
| #endif |
| }; |
| |
| |
| if( pzErrMsg ) *pzErrMsg = 0; |
| |
| /* Ticket #1863. To avoid a creating security problems for older |
| ** applications that relink against newer versions of SQLite, the |
| ** ability to run load_extension is turned off by default. One |
| ** must call either sqlite3_enable_load_extension(db) or |
| ** sqlite3_db_config(db, SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION, 1, 0) |
| ** to turn on extension loading. |
| */ |
| if( (db->flags & SQLITE_LoadExtension)==0 ){ |
| if( pzErrMsg ){ |
| *pzErrMsg = sqlite3_mprintf("not authorized"); |
| } |
| return SQLITE_ERROR; |
| } |
| |
| zEntry = zProc ? zProc : "sqlite3_extension_init"; |
| |
| handle = sqlite3OsDlOpen(pVfs, zFile); |
| #if SQLITE_OS_UNIX || SQLITE_OS_WIN |
| for(ii=0; ii<ArraySize(azEndings) && handle==0; ii++){ |
| char *zAltFile = sqlite3_mprintf("%s.%s", zFile, azEndings[ii]); |
| if( zAltFile==0 ) return SQLITE_NOMEM_BKPT; |
| handle = sqlite3OsDlOpen(pVfs, zAltFile); |
| sqlite3_free(zAltFile); |
| } |
| #endif |
| if( handle==0 ){ |
| if( pzErrMsg ){ |
| *pzErrMsg = zErrmsg = sqlite3_malloc64(nMsg); |
| if( zErrmsg ){ |
| sqlite3_snprintf(nMsg, zErrmsg, |
| "unable to open shared library [%s]", zFile); |
| sqlite3OsDlError(pVfs, nMsg-1, zErrmsg); |
| } |
| } |
| return SQLITE_ERROR; |
| } |
| xInit = (sqlite3_loadext_entry)sqlite3OsDlSym(pVfs, handle, zEntry); |
| |
| /* If no entry point was specified and the default legacy |
| ** entry point name "sqlite3_extension_init" was not found, then |
| ** construct an entry point name "sqlite3_X_init" where the X is |
| ** replaced by the lowercase value of every ASCII alphabetic |
| ** character in the filename after the last "/" upto the first ".", |
| ** and eliding the first three characters if they are "lib". |
| ** Examples: |
| ** |
| ** /usr/local/lib/libExample5.4.3.so ==> sqlite3_example_init |
| ** C:/lib/mathfuncs.dll ==> sqlite3_mathfuncs_init |
| */ |
| if( xInit==0 && zProc==0 ){ |
| int iFile, iEntry, c; |
| int ncFile = sqlite3Strlen30(zFile); |
| zAltEntry = sqlite3_malloc64(ncFile+30); |
| if( zAltEntry==0 ){ |
| sqlite3OsDlClose(pVfs, handle); |
| return SQLITE_NOMEM_BKPT; |
| } |
| memcpy(zAltEntry, "sqlite3_", 8); |
| for(iFile=ncFile-1; iFile>=0 && zFile[iFile]!='/'; iFile--){} |
| iFile++; |
| if( sqlite3_strnicmp(zFile+iFile, "lib", 3)==0 ) iFile += 3; |
| for(iEntry=8; (c = zFile[iFile])!=0 && c!='.'; iFile++){ |
| if( sqlite3Isalpha(c) ){ |
| zAltEntry[iEntry++] = (char)sqlite3UpperToLower[(unsigned)c]; |
| } |
| } |
| memcpy(zAltEntry+iEntry, "_init", 6); |
| zEntry = zAltEntry; |
| xInit = (sqlite3_loadext_entry)sqlite3OsDlSym(pVfs, handle, zEntry); |
| } |
| if( xInit==0 ){ |
| if( pzErrMsg ){ |
| nMsg += sqlite3Strlen30(zEntry); |
| *pzErrMsg = zErrmsg = sqlite3_malloc64(nMsg); |
| if( zErrmsg ){ |
| sqlite3_snprintf(nMsg, zErrmsg, |
| "no entry point [%s] in shared library [%s]", zEntry, zFile); |
| sqlite3OsDlError(pVfs, nMsg-1, zErrmsg); |
| } |
| } |
| sqlite3OsDlClose(pVfs, handle); |
| sqlite3_free(zAltEntry); |
| return SQLITE_ERROR; |
| } |
| sqlite3_free(zAltEntry); |
| rc = xInit(db, &zErrmsg, &sqlite3Apis); |
| if( rc ){ |
| if( rc==SQLITE_OK_LOAD_PERMANENTLY ) return SQLITE_OK; |
| if( pzErrMsg ){ |
| *pzErrMsg = sqlite3_mprintf("error during initialization: %s", zErrmsg); |
| } |
| sqlite3_free(zErrmsg); |
| sqlite3OsDlClose(pVfs, handle); |
| return SQLITE_ERROR; |
| } |
| |
| /* Append the new shared library handle to the db->aExtension array. */ |
| aHandle = sqlite3DbMallocZero(db, sizeof(handle)*(db->nExtension+1)); |
| if( aHandle==0 ){ |
| return SQLITE_NOMEM_BKPT; |
| } |
| if( db->nExtension>0 ){ |
| memcpy(aHandle, db->aExtension, sizeof(handle)*db->nExtension); |
| } |
| sqlite3DbFree(db, db->aExtension); |
| db->aExtension = aHandle; |
| |
| db->aExtension[db->nExtension++] = handle; |
| return SQLITE_OK; |
| } |
| int sqlite3_load_extension( |
| sqlite3 *db, /* Load the extension into this database connection */ |
| const char *zFile, /* Name of the shared library containing extension */ |
| const char *zProc, /* Entry point. Use "sqlite3_extension_init" if 0 */ |
| char **pzErrMsg /* Put error message here if not 0 */ |
| ){ |
| int rc; |
| sqlite3_mutex_enter(db->mutex); |
| rc = sqlite3LoadExtension(db, zFile, zProc, pzErrMsg); |
| rc = sqlite3ApiExit(db, rc); |
| sqlite3_mutex_leave(db->mutex); |
| return rc; |
| } |
| |
| /* |
| ** Call this routine when the database connection is closing in order |
| ** to clean up loaded extensions |
| */ |
| void sqlite3CloseExtensions(sqlite3 *db){ |
| int i; |
| assert( sqlite3_mutex_held(db->mutex) ); |
| for(i=0; i<db->nExtension; i++){ |
| sqlite3OsDlClose(db->pVfs, db->aExtension[i]); |
| } |
| sqlite3DbFree(db, db->aExtension); |
| } |
| |
| /* |
| ** Enable or disable extension loading. Extension loading is disabled by |
| ** default so as not to open security holes in older applications. |
| */ |
| int sqlite3_enable_load_extension(sqlite3 *db, int onoff){ |
| sqlite3_mutex_enter(db->mutex); |
| if( onoff ){ |
| db->flags |= SQLITE_LoadExtension|SQLITE_LoadExtFunc; |
| }else{ |
| db->flags &= ~(SQLITE_LoadExtension|SQLITE_LoadExtFunc); |
| } |
| sqlite3_mutex_leave(db->mutex); |
| return SQLITE_OK; |
| } |
| |
| #endif /* !defined(SQLITE_OMIT_LOAD_EXTENSION) */ |
| |
| /* |
| ** The following object holds the list of automatically loaded |
| ** extensions. |
| ** |
| ** This list is shared across threads. The SQLITE_MUTEX_STATIC_MASTER |
| ** mutex must be held while accessing this list. |
| */ |
| typedef struct sqlite3AutoExtList sqlite3AutoExtList; |
| static SQLITE_WSD struct sqlite3AutoExtList { |
| u32 nExt; /* Number of entries in aExt[] */ |
| void (**aExt)(void); /* Pointers to the extension init functions */ |
| } sqlite3Autoext = { 0, 0 }; |
| |
| /* The "wsdAutoext" macro will resolve to the autoextension |
| ** state vector. If writable static data is unsupported on the target, |
| ** we have to locate the state vector at run-time. In the more common |
| ** case where writable static data is supported, wsdStat can refer directly |
| ** to the "sqlite3Autoext" state vector declared above. |
| */ |
| #ifdef SQLITE_OMIT_WSD |
| # define wsdAutoextInit \ |
| sqlite3AutoExtList *x = &GLOBAL(sqlite3AutoExtList,sqlite3Autoext) |
| # define wsdAutoext x[0] |
| #else |
| # define wsdAutoextInit |
| # define wsdAutoext sqlite3Autoext |
| #endif |
| |
| |
| /* |
| ** Register a statically linked extension that is automatically |
| ** loaded by every new database connection. |
| */ |
| int sqlite3_auto_extension( |
| void (*xInit)(void) |
| ){ |
| int rc = SQLITE_OK; |
| #ifndef SQLITE_OMIT_AUTOINIT |
| rc = sqlite3_initialize(); |
| if( rc ){ |
| return rc; |
| }else |
| #endif |
| { |
| u32 i; |
| #if SQLITE_THREADSAFE |
| sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); |
| #endif |
| wsdAutoextInit; |
| sqlite3_mutex_enter(mutex); |
| for(i=0; i<wsdAutoext.nExt; i++){ |
| if( wsdAutoext.aExt[i]==xInit ) break; |
| } |
| if( i==wsdAutoext.nExt ){ |
| u64 nByte = (wsdAutoext.nExt+1)*sizeof(wsdAutoext.aExt[0]); |
| void (**aNew)(void); |
| aNew = sqlite3_realloc64(wsdAutoext.aExt, nByte); |
| if( aNew==0 ){ |
| rc = SQLITE_NOMEM_BKPT; |
| }else{ |
| wsdAutoext.aExt = aNew; |
| wsdAutoext.aExt[wsdAutoext.nExt] = xInit; |
| wsdAutoext.nExt++; |
| } |
| } |
| sqlite3_mutex_leave(mutex); |
| assert( (rc&0xff)==rc ); |
| return rc; |
| } |
| } |
| |
| /* |
| ** Cancel a prior call to sqlite3_auto_extension. Remove xInit from the |
| ** set of routines that is invoked for each new database connection, if it |
| ** is currently on the list. If xInit is not on the list, then this |
| ** routine is a no-op. |
| ** |
| ** Return 1 if xInit was found on the list and removed. Return 0 if xInit |
| ** was not on the list. |
| */ |
| int sqlite3_cancel_auto_extension( |
| void (*xInit)(void) |
| ){ |
| #if SQLITE_THREADSAFE |
| sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); |
| #endif |
| int i; |
| int n = 0; |
| wsdAutoextInit; |
| sqlite3_mutex_enter(mutex); |
| for(i=(int)wsdAutoext.nExt-1; i>=0; i--){ |
| if( wsdAutoext.aExt[i]==xInit ){ |
| wsdAutoext.nExt--; |
| wsdAutoext.aExt[i] = wsdAutoext.aExt[wsdAutoext.nExt]; |
| n++; |
| break; |
| } |
| } |
| sqlite3_mutex_leave(mutex); |
| return n; |
| } |
| |
| /* |
| ** Reset the automatic extension loading mechanism. |
| */ |
| void sqlite3_reset_auto_extension(void){ |
| #ifndef SQLITE_OMIT_AUTOINIT |
| if( sqlite3_initialize()==SQLITE_OK ) |
| #endif |
| { |
| #if SQLITE_THREADSAFE |
| sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); |
| #endif |
| wsdAutoextInit; |
| sqlite3_mutex_enter(mutex); |
| sqlite3_free(wsdAutoext.aExt); |
| wsdAutoext.aExt = 0; |
| wsdAutoext.nExt = 0; |
| sqlite3_mutex_leave(mutex); |
| } |
| } |
| |
| /* |
| ** Load all automatic extensions. |
| ** |
| ** If anything goes wrong, set an error in the database connection. |
| */ |
| void sqlite3AutoLoadExtensions(sqlite3 *db){ |
| u32 i; |
| int go = 1; |
| int rc; |
| sqlite3_loadext_entry xInit; |
| |
| wsdAutoextInit; |
| if( wsdAutoext.nExt==0 ){ |
| /* Common case: early out without every having to acquire a mutex */ |
| return; |
| } |
| for(i=0; go; i++){ |
| char *zErrmsg; |
| #if SQLITE_THREADSAFE |
| sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); |
| #endif |
| #ifdef SQLITE_OMIT_LOAD_EXTENSION |
| const sqlite3_api_routines *pThunk = 0; |
| #else |
| const sqlite3_api_routines *pThunk = &sqlite3Apis; |
| #endif |
| sqlite3_mutex_enter(mutex); |
| if( i>=wsdAutoext.nExt ){ |
| xInit = 0; |
| go = 0; |
| }else{ |
| xInit = (sqlite3_loadext_entry)wsdAutoext.aExt[i]; |
| } |
| sqlite3_mutex_leave(mutex); |
| zErrmsg = 0; |
| if( xInit && (rc = xInit(db, &zErrmsg, pThunk))!=0 ){ |
| sqlite3ErrorWithMsg(db, rc, |
| "automatic extension loading failed: %s", zErrmsg); |
| go = 0; |
| } |
| sqlite3_free(zErrmsg); |
| } |
| } |