/*
** Implementation of the last_statement_change_count() SQL function. The
** return value is the same as the sqlite_last_statement_changes() API function.
*/
static void last_statement_change_count(sqlite_func *context, int arg,
const char **argv){
sqlite *db = sqlite_user_data(context);
sqlite_set_result_int(context, sqlite_last_statement_changes(db));
}
/*
** The "sqlite" command below creates a new Tcl command for each
** connection it opens to an SQLite database. This routine is invoked
** whenever one of those connection-specific commands is executed
** in Tcl. For example, if you run Tcl code like this:
**
** sqlite db1 "my_database"
** db1 close
**
** The first command opens a connection to the "my_database" database
** and calls that connection "db1". The second command causes this
** subroutine to be invoked.
*/
static int DbObjCmd(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
SqliteDb *pDb = (SqliteDb*)cd;
int choice;
int rc = TCL_OK;
static const char *DB_strs[] = {
"authorizer", "busy", "changes",
"close", "commit_hook", "complete",
"errorcode", "eval", "function",
"last_insert_rowid", "last_statement_changes", "onecolumn",
"progress", "rekey", "timeout",
"trace",
0
};
enum DB_enum {
DB_AUTHORIZER, DB_BUSY, DB_CHANGES,
DB_CLOSE, DB_COMMIT_HOOK, DB_COMPLETE,
DB_ERRORCODE, DB_EVAL, DB_FUNCTION,
DB_LAST_INSERT_ROWID, DB_LAST_STATEMENT_CHANGES, DB_ONECOLUMN,
DB_PROGRESS, DB_REKEY, DB_TIMEOUT,
DB_TRACE
};
if( objc<2 ){
Tcl_WrongNumArgs(interp, 1, objv, "SUBCOMMAND ...");
return TCL_ERROR;
}
if( Tcl_GetIndexFromObj(interp, objv[1], DB_strs, "option", 0, &choice) ){
return TCL_ERROR;
}
switch( (enum DB_enum)choice ){
/* $db authorizer ?CALLBACK?
**
** Invoke the given callback to authorize each SQL operation as it is
** compiled. 5 arguments are appended to the callback before it is
** invoked:
**
** (1) The authorization type (ex: SQLITE_CREATE_TABLE, SQLITE_INSERT, ...)
** (2) First descriptive name (depends on authorization type)
** (3) Second descriptive name
** (4) Name of the database (ex: "main", "temp")
** (5) Name of trigger that is doing the access
**
** The callback should return on of the following strings: SQLITE_OK,
** SQLITE_IGNORE, or SQLITE_DENY. Any other return value is an error.
**
** If this method is invoked with no arguments, the current authorization
** callback string is returned.
*/
case DB_AUTHORIZER: {
if( objc>3 ){
Tcl_WrongNumArgs(interp, 2, objv, "?CALLBACK?");
}else if( objc==2 ){
if( pDb->zAuth ){
Tcl_AppendResult(interp, pDb->zAuth, 0);
}
}else{
char *zAuth;
int len;
if( pDb->zAuth ){
Tcl_Free(pDb->zAuth);
}
zAuth = Tcl_GetStringFromObj(objv[2], &len);
if( zAuth && len>0 ){
pDb->zAuth = Tcl_Alloc( len + 1 );
strcpy(pDb->zAuth, zAuth);
}else{
pDb->zAuth = 0;
}
#ifndef SQLITE_OMIT_AUTHORIZATION
if( pDb->zAuth ){
pDb->interp = interp;
sqlite_set_authorizer(pDb->db, auth_callback, pDb);
}else{
sqlite_set_authorizer(pDb->db, 0, 0);
}
#endif
}
break;
}
/* $db busy ?CALLBACK?
**
** Invoke the given callback if an SQL statement attempts to open
** a locked database file.
*/
case DB_BUSY: {
if( objc>3 ){
Tcl_WrongNumArgs(interp, 2, objv, "CALLBACK");
return TCL_ERROR;
}else if( objc==2 ){
if( pDb->zBusy ){
Tcl_AppendResult(interp, pDb->zBusy, 0);
}
}else{
char *zBusy;
int len;
if( pDb->zBusy ){
Tcl_Free(pDb->zBusy);
}
zBusy = Tcl_GetStringFromObj(objv[2], &len);
if( zBusy && len>0 ){
pDb->zBusy = Tcl_Alloc( len + 1 );
strcpy(pDb->zBusy, zBusy);
}else{
pDb->zBusy = 0;
}
if( pDb->zBusy ){
pDb->interp = interp;
sqlite_busy_handler(pDb->db, DbBusyHandler, pDb);
}else{
sqlite_busy_handler(pDb->db, 0, 0);
}
}
break;
}
/* $db progress ?N CALLBACK?
**
** Invoke the given callback every N virtual machine opcodes while executing
** queries.
*/
case DB_PROGRESS: {
if( objc==2 ){
if( pDb->zProgress ){
Tcl_AppendResult(interp, pDb->zProgress, 0);
}
}else if( objc==4 ){
char *zProgress;
int len;
int N;
if( TCL_OK!=Tcl_GetIntFromObj(interp, objv[2], &N) ){
return TCL_ERROR;
};
if( pDb->zProgress ){
Tcl_Free(pDb->zProgress);
}
zProgress = Tcl_GetStringFromObj(objv[3], &len);
if( zProgress && len>0 ){
pDb->zProgress = Tcl_Alloc( len + 1 );
strcpy(pDb->zProgress, zProgress);
}else{
pDb->zProgress = 0;
}
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
if( pDb->zProgress ){
pDb->interp = interp;
sqlite_progress_handler(pDb->db, N, DbProgressHandler, pDb);
}else{
sqlite_progress_handler(pDb->db, 0, 0, 0);
}
#endif
}else{
Tcl_WrongNumArgs(interp, 2, objv, "N CALLBACK");
return TCL_ERROR;
}
break;
}
/*
** $db changes
**
** Return the number of rows that were modified, inserted, or deleted by
** the most recent "eval".
*/
case DB_CHANGES: {
Tcl_Obj *pResult;
int nChange;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 2, objv, "");
return TCL_ERROR;
}
nChange = sqlite_changes(pDb->db);
pResult = Tcl_GetObjResult(interp);
Tcl_SetIntObj(pResult, nChange);
break;
}
/*
** $db last_statement_changes
**
** Return the number of rows that were modified, inserted, or deleted by
** the last statment to complete execution (excluding changes due to
** triggers)
*/
case DB_LAST_STATEMENT_CHANGES: {
Tcl_Obj *pResult;
int lsChange;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 2, objv, "");
return TCL_ERROR;
}
lsChange = sqlite_last_statement_changes(pDb->db);
pResult = Tcl_GetObjResult(interp);
Tcl_SetIntObj(pResult, lsChange);
break;
}
/* $db close
**
** Shutdown the database
*/
case DB_CLOSE: {
Tcl_DeleteCommand(interp, Tcl_GetStringFromObj(objv[0], 0));
break;
}
/* $db commit_hook ?CALLBACK?
**
** Invoke the given callback just before committing every SQL transaction.
** If the callback throws an exception or returns non-zero, then the
** transaction is aborted. If CALLBACK is an empty string, the callback
** is disabled.
*/
case DB_COMMIT_HOOK: {
if( objc>3 ){
Tcl_WrongNumArgs(interp, 2, objv, "?CALLBACK?");
}else if( objc==2 ){
if( pDb->zCommit ){
Tcl_AppendResult(interp, pDb->zCommit, 0);
}
}else{
char *zCommit;
int len;
if( pDb->zCommit ){
Tcl_Free(pDb->zCommit);
}
zCommit = Tcl_GetStringFromObj(objv[2], &len);
if( zCommit && len>0 ){
pDb->zCommit = Tcl_Alloc( len + 1 );
strcpy(pDb->zCommit, zCommit);
}else{
pDb->zCommit = 0;
}
if( pDb->zCommit ){
pDb->interp = interp;
sqlite_commit_hook(pDb->db, DbCommitHandler, pDb);
}else{
sqlite_commit_hook(pDb->db, 0, 0);
}
}
break;
}
/* $db complete SQL
**
** Return TRUE if SQL is a complete SQL statement. Return FALSE if
** additional lines of input are needed. This is similar to the
** built-in "info complete" command of Tcl.
*/
case DB_COMPLETE: {
Tcl_Obj *pResult;
int isComplete;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 2, objv, "SQL");
return TCL_ERROR;
}
isComplete = sqlite_complete( Tcl_GetStringFromObj(objv[2], 0) );
pResult = Tcl_GetObjResult(interp);
Tcl_SetBooleanObj(pResult, isComplete);
break;
}
/*
** $db errorcode
**
** Return the numeric error code that was returned by the most recent
** call to sqlite_exec().
*/
case DB_ERRORCODE: {
Tcl_SetObjResult(interp, Tcl_NewIntObj(pDb->rc));
break;
}
/*
** $db eval $sql ?array { ...code... }?
**
** The SQL statement in $sql is evaluated. For each row, the values are
** placed in elements of the array named "array" and ...code... is executed.
** If "array" and "code" are omitted, then no callback is every invoked.
** If "array" is an empty string, then the values are placed in variables
** that have the same name as the fields extracted by the query.
*/
case DB_EVAL: {
CallbackData cbData;
char *zErrMsg;
char *zSql;
#ifdef UTF_TRANSLATION_NEEDED
Tcl_DString dSql;
int i;
#endif
if( objc!=5 && objc!=3 ){
Tcl_WrongNumArgs(interp, 2, objv, "SQL ?ARRAY-NAME CODE?");
return TCL_ERROR;
}
pDb->interp = interp;
zSql = Tcl_GetStringFromObj(objv[2], 0);
#ifdef UTF_TRANSLATION_NEEDED
Tcl_DStringInit(&dSql);
Tcl_UtfToExternalDString(NULL, zSql, -1, &dSql);
zSql = Tcl_DStringValue(&dSql);
#endif
Tcl_IncrRefCount(objv[2]);
if( objc==5 ){
cbData.interp = interp;
cbData.once = 1;
cbData.zArray = Tcl_GetStringFromObj(objv[3], 0);
cbData.pCode = objv[4];
cbData.tcl_rc = TCL_OK;
cbData.nColName = 0;
cbData.azColName = 0;
zErrMsg = 0;
Tcl_IncrRefCount(objv[3]);
Tcl_IncrRefCount(objv[4]);
rc = sqlite_exec(pDb->db, zSql, DbEvalCallback, &cbData, &zErrMsg);
Tcl_DecrRefCount(objv[4]);
Tcl_DecrRefCount(objv[3]);
if( cbData.tcl_rc==TCL_BREAK ){ cbData.tcl_rc = TCL_OK; }
}else{
Tcl_Obj *pList = Tcl_NewObj();
cbData.tcl_rc = TCL_OK;
rc = sqlite_exec(pDb->db, zSql, DbEvalCallback2, pList, &zErrMsg);
Tcl_SetObjResult(interp, pList);
}
pDb->rc = rc;
if( rc==SQLITE_ABORT ){
if( zErrMsg ) free(zErrMsg);
rc = cbData.tcl_rc;
}else if( zErrMsg ){
Tcl_SetResult(interp, zErrMsg, TCL_VOLATILE);
free(zErrMsg);
rc = TCL_ERROR;
}else if( rc!=SQLITE_OK ){
Tcl_AppendResult(interp, sqlite_error_string(rc), 0);
rc = TCL_ERROR;
}else{
}
Tcl_DecrRefCount(objv[2]);
#ifdef UTF_TRANSLATION_NEEDED
Tcl_DStringFree(&dSql);
if( objc==5 && cbData.azColName ){
for(i=0; i<cbData.nColName; i++){
if( cbData.azColName[i] ) free(cbData.azColName[i]);
}
free(cbData.azColName);
cbData.azColName = 0;
}
#endif
return rc;
}
/*
** $db function NAME SCRIPT
**
** Create a new SQL function called NAME. Whenever that function is
** called, invoke SCRIPT to evaluate the function.
*/
case DB_FUNCTION: {
SqlFunc *pFunc;
char *zName;
char *zScript;
int nScript;
if( objc!=4 ){
Tcl_WrongNumArgs(interp, 2, objv, "NAME SCRIPT");
return TCL_ERROR;
}
zName = Tcl_GetStringFromObj(objv[2], 0);
zScript = Tcl_GetStringFromObj(objv[3], &nScript);
pFunc = (SqlFunc*)Tcl_Alloc( sizeof(*pFunc) + nScript + 1 );
if( pFunc==0 ) return TCL_ERROR;
pFunc->interp = interp;
pFunc->pNext = pDb->pFunc;
pFunc->zScript = (char*)&pFunc[1];
strcpy(pFunc->zScript, zScript);
sqlite_create_function(pDb->db, zName, -1, tclSqlFunc, pFunc);
sqlite_function_type(pDb->db, zName, SQLITE_NUMERIC);
break;
}
/*
** $db last_insert_rowid
**
** Return an integer which is the ROWID for the most recent insert.
*/
case DB_LAST_INSERT_ROWID: {
Tcl_Obj *pResult;
int rowid;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 2, objv, "");
return TCL_ERROR;
}
rowid = sqlite_last_insert_rowid(pDb->db);
pResult = Tcl_GetObjResult(interp);
Tcl_SetIntObj(pResult, rowid);
break;
}
/*
** $db onecolumn SQL
**
** Return a single column from a single row of the given SQL query.
*/
case DB_ONECOLUMN: {
char *zSql;
char *zErrMsg = 0;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 2, objv, "SQL");
return TCL_ERROR;
}
zSql = Tcl_GetStringFromObj(objv[2], 0);
rc = sqlite_exec(pDb->db, zSql, DbEvalCallback3, interp, &zErrMsg);
if( rc==SQLITE_ABORT ){
rc = SQLITE_OK;
}else if( zErrMsg ){
Tcl_SetResult(interp, zErrMsg, TCL_VOLATILE);
free(zErrMsg);
rc = TCL_ERROR;
}else if( rc!=SQLITE_OK ){
Tcl_AppendResult(interp, sqlite_error_string(rc), 0);
rc = TCL_ERROR;
}
break;
}
/*
** $db rekey KEY
**
** Change the encryption key on the currently open database.
*/
case DB_REKEY: {
int nKey;
void *pKey;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 2, objv, "KEY");
return TCL_ERROR;
}
pKey = Tcl_GetByteArrayFromObj(objv[2], &nKey);
#ifdef SQLITE_HAS_CODEC
rc = sqlite_rekey(pDb->db, pKey, nKey);
if( rc ){
Tcl_AppendResult(interp, sqlite_error_string(rc), 0);
rc = TCL_ERROR;
}
#endif
break;
}
/*
** $db timeout MILLESECONDS
**
** Delay for the number of milliseconds specified when a file is locked.
*/
case DB_TIMEOUT: {
int ms;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 2, objv, "MILLISECONDS");
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[2], &ms) ) return TCL_ERROR;
sqlite_busy_timeout(pDb->db, ms);
break;
}
/* $db trace ?CALLBACK?
**
** Make arrangements to invoke the CALLBACK routine for each SQL statement
** that is executed. The text of the SQL is appended to CALLBACK before
** it is executed.
*/
case DB_TRACE: {
if( objc>3 ){
Tcl_WrongNumArgs(interp, 2, objv, "?CALLBACK?");
}else if( objc==2 ){
if( pDb->zTrace ){
Tcl_AppendResult(interp, pDb->zTrace, 0);
}
}else{
char *zTrace;
int len;
if( pDb->zTrace ){
Tcl_Free(pDb->zTrace);
}
zTrace = Tcl_GetStringFromObj(objv[2], &len);
if( zTrace && len>0 ){
pDb->zTrace = Tcl_Alloc( len + 1 );
strcpy(pDb->zTrace, zTrace);
}else{
pDb->zTrace = 0;
}
if( pDb->zTrace ){
pDb->interp = interp;
sqlite_trace(pDb->db, DbTraceHandler, pDb);
}else{
sqlite_trace(pDb->db, 0, 0);
}
}
break;
}
} /* End of the SWITCH statement */
return rc;
}