--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/sqlite3api/TEST/SRC/test_tclvar.c Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,325 @@
+/*
+** 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 1.17 2008/08/12 14:48:41 danielk1977 Exp $
+*/
+#include "sqliteInt.h"
+#include "tcl.h"
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+
+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; /* Result of [info vars ?pattern?] */
+ Tcl_Obj *pList2; /* Result of [array names [lindex $pList1 $i1]] */
+ int i1; /* Current item in pList1 */
+ int i2; /* Current item (if any) in pList2 */
+};
+
+/* Methods for the tclvar module */
+static int tclvarConnect(
+ sqlite3 *db,
+ void *pAux,
+ int argc, const char *const*argv,
+ sqlite3_vtab **ppVtab,
+ char **pzErr
+){
+ tclvar_vtab *pVtab;
+ static const char zSchema[] =
+ "CREATE TABLE whatever(name TEXT, arrayname TEXT, value TEXT)";
+ pVtab = sqlite3MallocZero( sizeof(*pVtab) );
+ if( pVtab==0 ) return SQLITE_NOMEM;
+ *ppVtab = &pVtab->base;
+ pVtab->interp = (Tcl_Interp *)pAux;
+ sqlite3_declare_vtab(db, zSchema);
+ return SQLITE_OK;
+}
+/* Note that for this virtual table, the xCreate and xConnect
+** methods are identical. */
+
+static int tclvarDisconnect(sqlite3_vtab *pVtab){
+ sqlite3_free(pVtab);
+ return SQLITE_OK;
+}
+/* The xDisconnect and xDestroy methods are also the same */
+
+/*
+** Open a new tclvar cursor.
+*/
+static int tclvarOpen(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor){
+ tclvar_cursor *pCur;
+ pCur = sqlite3MallocZero(sizeof(tclvar_cursor));
+ *ppCursor = &pCur->base;
+ return SQLITE_OK;
+}
+
+/*
+** Close a tclvar cursor.
+*/
+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);
+ }
+ sqlite3_free(pCur);
+ return SQLITE_OK;
+}
+
+/*
+** Returns 1 if data is ready, or 0 if not.
+*/
+static int next2(Tcl_Interp *interp, tclvar_cursor *pCur, Tcl_Obj *pObj){
+ Tcl_Obj *p;
+
+ if( pObj ){
+ if( !pCur->pList2 ){
+ p = Tcl_NewStringObj("array names", -1);
+ Tcl_IncrRefCount(p);
+ Tcl_ListObjAppendElement(0, p, pObj);
+ Tcl_EvalObjEx(interp, p, TCL_EVAL_GLOBAL);
+ Tcl_DecrRefCount(p);
+ pCur->pList2 = Tcl_GetObjResult(interp);
+ Tcl_IncrRefCount(pCur->pList2);
+ assert( pCur->i2==0 );
+ }else{
+ int n = 0;
+ pCur->i2++;
+ Tcl_ListObjLength(0, pCur->pList2, &n);
+ if( pCur->i2>=n ){
+ Tcl_DecrRefCount(pCur->pList2);
+ pCur->pList2 = 0;
+ pCur->i2 = 0;
+ return 0;
+ }
+ }
+ }
+
+ return 1;
+}
+
+static int tclvarNext(sqlite3_vtab_cursor *cur){
+ Tcl_Obj *pObj;
+ int n = 0;
+ int ok = 0;
+
+ tclvar_cursor *pCur = (tclvar_cursor *)cur;
+ Tcl_Interp *interp = ((tclvar_vtab *)(cur->pVtab))->interp;
+
+ Tcl_ListObjLength(0, pCur->pList1, &n);
+ while( !ok && pCur->i1<n ){
+ Tcl_ListObjIndex(0, pCur->pList1, pCur->i1, &pObj);
+ ok = next2(interp, pCur, pObj);
+ if( !ok ){
+ pCur->i1++;
+ }
+ }
+
+ return 0;
+}
+
+static int tclvarFilter(
+ sqlite3_vtab_cursor *pVtabCursor,
+ int idxNum, const char *idxStr,
+ int argc, sqlite3_value **argv
+){
+ tclvar_cursor *pCur = (tclvar_cursor *)pVtabCursor;
+ Tcl_Interp *interp = ((tclvar_vtab *)(pVtabCursor->pVtab))->interp;
+
+ Tcl_Obj *p = Tcl_NewStringObj("info vars", -1);
+ Tcl_IncrRefCount(p);
+
+ assert( argc==0 || argc==1 );
+ if( argc==1 ){
+ Tcl_Obj *pArg = Tcl_NewStringObj((char*)sqlite3_value_text(argv[0]), -1);
+ Tcl_ListObjAppendElement(0, p, pArg);
+ }
+ Tcl_EvalObjEx(interp, p, TCL_EVAL_GLOBAL);
+ pCur->pList1 = Tcl_GetObjResult(interp);
+ Tcl_IncrRefCount(pCur->pList1);
+ assert( pCur->i1==0 && pCur->i2==0 && pCur->pList2==0 );
+
+ Tcl_DecrRefCount(p);
+ return tclvarNext(pVtabCursor);
+}
+
+static int tclvarColumn(sqlite3_vtab_cursor *cur, sqlite3_context *ctx, int i){
+ Tcl_Obj *p1;
+ Tcl_Obj *p2;
+ const char *z1;
+ const char *z2 = "";
+ tclvar_cursor *pCur = (tclvar_cursor*)cur;
+ Tcl_Interp *interp = ((tclvar_vtab *)cur->pVtab)->interp;
+
+ Tcl_ListObjIndex(interp, pCur->pList1, pCur->i1, &p1);
+ Tcl_ListObjIndex(interp, pCur->pList2, pCur->i2, &p2);
+ z1 = Tcl_GetString(p1);
+ if( p2 ){
+ z2 = Tcl_GetString(p2);
+ }
+ switch (i) {
+ case 0: {
+ sqlite3_result_text(ctx, z1, -1, SQLITE_TRANSIENT);
+ break;
+ }
+ case 1: {
+ sqlite3_result_text(ctx, z2, -1, SQLITE_TRANSIENT);
+ break;
+ }
+ case 2: {
+ Tcl_Obj *pVal = Tcl_GetVar2Ex(interp, z1, *z2?z2:0, TCL_GLOBAL_ONLY);
+ sqlite3_result_text(ctx, Tcl_GetString(pVal), -1, SQLITE_TRANSIENT);
+ break;
+ }
+ }
+ return SQLITE_OK;
+}
+
+static int tclvarRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){
+ *pRowid = 0;
+ return SQLITE_OK;
+}
+
+static int tclvarEof(sqlite3_vtab_cursor *cur){
+ tclvar_cursor *pCur = (tclvar_cursor*)cur;
+ return (pCur->pList2?0:1);
+}
+
+static int tclvarBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
+ int ii;
+
+ for(ii=0; ii<pIdxInfo->nConstraint; ii++){
+ struct sqlite3_index_constraint const *pCons = &pIdxInfo->aConstraint[ii];
+ if( pCons->iColumn==0 && pCons->usable
+ && pCons->op==SQLITE_INDEX_CONSTRAINT_EQ ){
+ struct sqlite3_index_constraint_usage *pUsage;
+ pUsage = &pIdxInfo->aConstraintUsage[ii];
+ pUsage->omit = 0;
+ pUsage->argvIndex = 1;
+ return SQLITE_OK;
+ }
+ }
+
+ for(ii=0; ii<pIdxInfo->nConstraint; ii++){
+ struct sqlite3_index_constraint const *pCons = &pIdxInfo->aConstraint[ii];
+ if( pCons->iColumn==0 && pCons->usable
+ && pCons->op==SQLITE_INDEX_CONSTRAINT_MATCH ){
+ struct sqlite3_index_constraint_usage *pUsage;
+ pUsage = &pIdxInfo->aConstraintUsage[ii];
+ pUsage->omit = 1;
+ pUsage->argvIndex = 1;
+ return SQLITE_OK;
+ }
+ }
+
+ return SQLITE_OK;
+}
+
+/*
+** A virtual table module that provides read-only access to a
+** Tcl global variable namespace.
+*/
+static sqlite3_module tclvarModule = {
+ 0, /* iVersion */
+ 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 */
+ tclvarEof, /* xEof - check for end of scan */
+ tclvarColumn, /* xColumn - read data */
+ tclvarRowid, /* xRowid - read data */
+ 0, /* xUpdate */
+ 0, /* xBegin */
+ 0, /* xSync */
+ 0, /* xCommit */
+ 0, /* xRollback */
+ 0, /* xFindMethod */
+ 0, /* xRename */
+};
+
+/*
+** Decode a pointer to an sqlite3 object.
+*/
+extern int getDbPointer(Tcl_Interp *interp, const char *zA, sqlite3 **ppDb);
+
+/*
+** 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;
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+ sqlite3_create_module(db, "tclvar", &tclvarModule, (void *)interp);
+#endif
+ return TCL_OK;
+}
+
+#endif
+
+
+/*
+** Register commands with the TCL interpreter.
+*/
+int Sqlitetesttclvar_Init(Tcl_Interp *interp){
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+ 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);
+ }
+#endif
+ return TCL_OK;
+}