| /* |
| ** 2020-01-08 |
| ** |
| ** 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 SQLite extension implements a noop() function used for testing. |
| ** |
| ** Variants: |
| ** |
| ** noop(X) The default. Deterministic. |
| ** noop_i(X) Deterministic and innocuous. |
| ** noop_do(X) Deterministic and direct-only. |
| ** noop_nd(X) Non-deterministic. |
| */ |
| #include "sqlite3ext.h" |
| SQLITE_EXTENSION_INIT1 |
| #include <assert.h> |
| #include <string.h> |
| |
| /* |
| ** Implementation of the noop() function. |
| ** |
| ** The function returns its argument, unchanged. |
| */ |
| static void noopfunc( |
| sqlite3_context *context, |
| int argc, |
| sqlite3_value **argv |
| ){ |
| assert( argc==1 ); |
| sqlite3_result_value(context, argv[0]); |
| } |
| |
| #ifdef _WIN32 |
| __declspec(dllexport) |
| #endif |
| int sqlite3_noop_init( |
| sqlite3 *db, |
| char **pzErrMsg, |
| const sqlite3_api_routines *pApi |
| ){ |
| int rc = SQLITE_OK; |
| SQLITE_EXTENSION_INIT2(pApi); |
| (void)pzErrMsg; /* Unused parameter */ |
| rc = sqlite3_create_function(db, "noop", 1, |
| SQLITE_UTF8 | SQLITE_DETERMINISTIC, |
| 0, noopfunc, 0, 0); |
| if( rc ) return rc; |
| rc = sqlite3_create_function(db, "noop_i", 1, |
| SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_INNOCUOUS, |
| 0, noopfunc, 0, 0); |
| if( rc ) return rc; |
| rc = sqlite3_create_function(db, "noop_do", 1, |
| SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_DIRECTONLY, |
| 0, noopfunc, 0, 0); |
| if( rc ) return rc; |
| rc = sqlite3_create_function(db, "noop_nd", 1, |
| SQLITE_UTF8, |
| 0, noopfunc, 0, 0); |
| return rc; |
| } |