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69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/*
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** 2020-01-08
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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******************************************************************************
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**
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** This SQLite extension implements a noop() function used for testing.
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**
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** Variants:
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**
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** noop(X) The default. Deterministic.
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** noop_i(X) Deterministic and innocuous.
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** noop_do(X) Deterministic and direct-only.
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** noop_nd(X) Non-deterministic.
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*/
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#include "sqlite3ext.h"
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SQLITE_EXTENSION_INIT1
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#include <assert.h>
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#include <string.h>
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/*
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** Implementation of the noop() function.
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**
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** The function returns its argument, unchanged.
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*/
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static void noopfunc(
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sqlite3_context *context,
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int argc,
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sqlite3_value **argv
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){
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assert( argc==1 );
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sqlite3_result_value(context, argv[0]);
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}
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#ifdef _WIN32
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__declspec(dllexport)
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#endif
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int sqlite3_noop_init(
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sqlite3 *db,
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char **pzErrMsg,
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const sqlite3_api_routines *pApi
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){
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int rc = SQLITE_OK;
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SQLITE_EXTENSION_INIT2(pApi);
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(void)pzErrMsg; /* Unused parameter */
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rc = sqlite3_create_function(db, "noop", 1,
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SQLITE_UTF8 | SQLITE_DETERMINISTIC,
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0, noopfunc, 0, 0);
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if( rc ) return rc;
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rc = sqlite3_create_function(db, "noop_i", 1,
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SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_INNOCUOUS,
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0, noopfunc, 0, 0);
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if( rc ) return rc;
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rc = sqlite3_create_function(db, "noop_do", 1,
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SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_DIRECTONLY,
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0, noopfunc, 0, 0);
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if( rc ) return rc;
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rc = sqlite3_create_function(db, "noop_nd", 1,
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SQLITE_UTF8,
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0, noopfunc, 0, 0);
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return rc;
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}
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