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/*
** 2006 June 13
**
** 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.
**
*************************************************************************
** Code for testing the virtual table interfaces. This code
** is not included in the SQLite library. It is used for automated
** testing of the SQLite library.
**
** The emphasis of this file is a virtual table that provides
** access to TCL variables.
**
** $Id: test_tclvar.c,v 1.1 2006/06/13 23:51:35 drh Exp $
*/
#include "sqliteInt.h"
#include "tcl.h"
#include "os.h"
#include <stdlib.h>
#include <string.h>
typedef struct tclvar_vtab tclvar_vtab;
typedef struct tclvar_cursor tclvar_cursor;
/*
** A tclvar virtual-table object
*/
struct tclvar_vtab {
sqlite3_vtab base;
Tcl_Interp *interp;
};
/* A tclvar cursor object */
struct tclvar_cursor {
sqlite3_vtab_cursor base;
Tcl_Obj *pList1, *pList2;
int i, j;
};
/* Methods for the tclvar module */
static int tclvarConnect(
sqlite3 *db,
const sqlite3_module *pModule,
int argc, char **argv,
sqlite3_vtab **ppVtab
){
tclvar_vtab *pVtab;
static const char zSchema[] =
"CREATE TABLE whatever(name TEXT, arrayname TEXT, value TEXT)";
pVtab = sqliteMalloc( sizeof(*pVtab) );
if( pVtab==0 ) return SQLITE_NOMEM;
*ppVtab = &pVtab->base;
pVtab->base.pModule = pModule;
pVtab->interp = pModule->pAux;
#ifndef SQLITE_OMIT_VIRTUALTABLE
sqlite3_declare_vtab(db, zSchema);
#endif
return SQLITE_OK;
}
/* Note that for this virtual table, the xCreate and xConnect
** methods are identical. */
static int tclvarDisconnect(sqlite3_vtab *pVtab){
free(pVtab);
}
/* The xDisconnect and xDestroy methods are also the same */
static int tclvarOpen(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor){
tclvar_cursor *pCur;
pCur = sqliteMalloc(sizeof(tclvar_cursor));
*ppCursor = &pCur->base;
return SQLITE_OK;
}
static int tclvarClose(sqlite3_vtab_cursor *cur){
tclvar_cursor *pCur = (tclvar_cursor *)cur;
if( pCur->pList1 ){
Tcl_DecrRefCount(pCur->pList1);
}
if( pCur->pList2 ){
Tcl_DecrRefCount(pCur->pList2);
}
sqliteFree(pCur);
return SQLITE_OK;
}
static int tclvarNext(sqlite3_vtab_cursor *cur){
tclvar_cursor *pCur = (tclvar_cursor *)cur;
return 0;
}
static int tclvarColumn(sqlite3_vtab_cursor *cur, sqlite3_context *ctx, int i){
tclvar_cursor *pCur = (tclvar_cursor*)cur;
return SQLITE_OK;
}
static int tclvarRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){
tclvar_cursor *pCur = (tclvar_cursor*)cur;
return SQLITE_OK;
}
static int tclvarFilter(
sqlite3_vtab_cursor *pVtabCursor,
int idxNum, const char *idxStr,
int argc, sqlite3_value **argv
){
tclvar_cursor *pCur = (tclvar_cursor *)pVtabCursor;
tclvar_vtab *pVtab = (tclvar_vtab *)pCur->base.pVtab;
return 0;
}
/*
*/
static int tclvarBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
tclvar_vtab *pVtab = (tclvar_vtab *)tab;
return SQLITE_OK;
}
/*
** A virtual table module that merely echos method calls into TCL
** variables.
*/
static sqlite3_module tclvarModule = {
0, /* iVersion */
"tclvar", /* zName */
0, /* pAux */
tclvarConnect,
tclvarConnect,
tclvarBestIndex,
tclvarDisconnect,
tclvarDisconnect,
tclvarOpen, /* xOpen - open a cursor */
tclvarClose, /* xClose - close a cursor */
tclvarFilter, /* xFilter - configure scan constraints */
tclvarNext, /* xNext - advance a cursor */
tclvarColumn, /* xColumn - read data */
tclvarRowid /* xRowid - read data */
};
/*
** Decode a pointer to an sqlite3 object.
*/
static int getDbPointer(Tcl_Interp *interp, const char *zA, sqlite3 **ppDb){
*ppDb = (sqlite3*)sqlite3TextToPtr(zA);
return TCL_OK;
}
/*
** Register the echo virtual table module.
*/
static int register_tclvar_module(
ClientData clientData, /* Pointer to sqlite3_enable_XXX function */
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
int objc, /* Number of arguments */
Tcl_Obj *CONST objv[] /* Command arguments */
){
sqlite3 *db;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "DB");
return TCL_ERROR;
}
if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ) return TCL_ERROR;
tclvarModule.pAux = interp;
#ifndef SQLITE_OMIT_VIRTUALTABLE
sqlite3_create_module(db, "tclvar", &tclvarModule);
#endif
return TCL_OK;
}
/*
** Register commands with the TCL interpreter.
*/
int Sqlitetesttclvar_Init(Tcl_Interp *interp){
static struct {
char *zName;
Tcl_ObjCmdProc *xProc;
void *clientData;
} aObjCmd[] = {
{ "register_tclvar_module", register_tclvar_module, 0 },
};
int i;
for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){
Tcl_CreateObjCommand(interp, aObjCmd[i].zName,
aObjCmd[i].xProc, aObjCmd[i].clientData, 0);
}
return TCL_OK;
}
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