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Diffstat (limited to 'third_party/sqlite/src/test_tclvar.c')
| -rwxr-xr-x | third_party/sqlite/src/test_tclvar.c | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/third_party/sqlite/src/test_tclvar.c b/third_party/sqlite/src/test_tclvar.c new file mode 100755 index 0000000..6cbec53 --- /dev/null +++ b/third_party/sqlite/src/test_tclvar.c @@ -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 1.16 2008/07/07 14:50:14 drh 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){ + static struct { + char *zName; + Tcl_ObjCmdProc *xProc; + void *clientData; + } aObjCmd[] = { +#ifndef SQLITE_OMIT_VIRTUALTABLE + { "register_tclvar_module", register_tclvar_module, 0 }, +#endif + }; + 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; +} |