int justConstants);
static void		ArrayPopulateSearch(Tcl_Interp *interp,
			    Tcl_Obj *arrayNameObj, Var *varPtr,
			    ArraySearch *searchPtr);
static void		ArrayDoneSearch(Interp *iPtr, Var *varPtr,
			    ArraySearch *searchPtr);
static Tcl_NRPostProc   ArrayForLoopCallback;
static Tcl_ObjCmdProc2	ArrayForNRCmd;
static void		DeleteSearches(Interp *iPtr, Var *arrayVarPtr);
static void		DeleteArray(Interp *iPtr, Tcl_Obj *arrayNamePtr,
			    Var *varPtr, int flags, Tcl_Size index);
static int		LocateArray(Tcl_Interp *interp, Tcl_Obj *name,
			    Var **varPtrPtr, int *isArrayPtr);
static int		NotArrayError(Tcl_Interp *interp, Tcl_Obj *name);
static Tcl_Var		ObjFindNamespaceVar(Tcl_Interp *interp,

			    Interp *iPtr, Tcl_Obj *part1Ptr,
			    Tcl_Obj *part2Ptr, int flags, Tcl_Size index);

/*
 * TIP #508: [array default]
 */

static Tcl_ObjCmdProc2	ArrayDefaultCmd;
static void		DeleteArrayVar(Var *arrayPtr);
static void		SetArrayDefault(Var *arrayPtr, Tcl_Obj *defaultObj);

/*
 * Functions defined in this file that may be exported in the future for use
 * by the bytecode compiler and engine or to the public interface.
 */

 *----------------------------------------------------------------------
 */

int
Tcl_SetObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Tcl_Obj *varValueObj;

    if (objc == 2) {
	varValueObj = Tcl_ObjGetVar2(interp, objv[1], NULL,TCL_LEAVE_ERR_MSG);
	if (varValueObj == NULL) {

 *----------------------------------------------------------------------
 */

int
Tcl_UnsetObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Tcl_Size i;
    int flags = TCL_LEAVE_ERR_MSG;
    const char *name;

    if (objc == 1) {
	/*
	 * Do nothing if no arguments supplied, so as to match command
	 * documentation.

 *----------------------------------------------------------------------
 */

int
Tcl_AppendObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Var *varPtr, *arrayPtr;
    Tcl_Obj *varValuePtr = NULL;
				/* Initialized to avoid compiler warning. */
    Tcl_Size i;

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "varName ?value ...?");
	return TCL_ERROR;
    }

    if (objc == 2) {

 *----------------------------------------------------------------------
 */

int
Tcl_LappendObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Tcl_Obj *varValuePtr, *newValuePtr;
    Tcl_Size numElems;
    Var *varPtr, *arrayPtr;
    int result, createdNewObj;

    return donerc;
}

static int
ArrayForObjCmd(
    void *clientData,
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    return Tcl_NRCallObjProc2(interp, ArrayForNRCmd, clientData, objc, objv);
}

static int
ArrayForNRCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const *objv)
{
    Tcl_Obj *varListObj, *arrayNameObj, *scriptObj;
    ArraySearch *searchPtr = NULL;
    Var *varPtr;
    int isArray;
    Tcl_Size numVars;

 *----------------------------------------------------------------------
 */

static int
ArrayStartSearchCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    Var *varPtr;
    int isArray;
    ArraySearch *searchPtr;

    if (objc != 2) {

 *----------------------------------------------------------------------
 */

static int
ArrayAnyMoreCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    Interp *iPtr = (Interp *) interp;
    Var *varPtr;
    Tcl_Obj *varNameObj, *searchObj;
    int gotValue, isArray;
    ArraySearch *searchPtr;

 *----------------------------------------------------------------------
 */

static int
ArrayNextElementCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    Var *varPtr;
    Tcl_Obj *varNameObj, *searchObj;
    ArraySearch *searchPtr;
    int isArray;

 *----------------------------------------------------------------------
 */

static int
ArrayDoneSearchCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    Interp *iPtr = (Interp *) interp;
    Var *varPtr;
    Tcl_Obj *varNameObj, *searchObj;
    ArraySearch *searchPtr;
    int isArray;

 *----------------------------------------------------------------------
 */

static int
ArrayExistsCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    Interp *iPtr = (Interp *)interp;
    int isArray;

    if (objc != 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "arrayName");

 *----------------------------------------------------------------------
 */

static int
ArrayGetCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    Var *varPtr, *varPtr2;
    Tcl_Obj *varNameObj, *nameObj, *valueObj, *nameLstObj, *tmpResObj;
    Tcl_Obj **nameObjPtr, *patternObj;
    Tcl_HashSearch search;
    const char *pattern;

 *----------------------------------------------------------------------
 */

static int
ArrayNamesCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    static const char *const options[] = {
	"-exact", "-glob", "-regexp", NULL
    };
    enum arrayNamesOptionsEnum {OPT_EXACT, OPT_GLOB, OPT_REGEXP} mode = OPT_GLOB;
    Var *varPtr, *varPtr2;

 *----------------------------------------------------------------------
 */

static int
ArraySetCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    Tcl_Obj *arrayNameObj;
    Tcl_Obj *arrayElemObj;
    Var *varPtr, *arrayPtr;
    int result;

 *----------------------------------------------------------------------
 */

static int
ArraySizeCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    Var *varPtr;
    Tcl_HashSearch search;
    Var *varPtr2;
    int isArray, size = 0;

 *----------------------------------------------------------------------
 */

static int
ArrayStatsCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    Var *varPtr;
    Tcl_Obj *varNameObj;
    char *stats;
    int isArray;

 *----------------------------------------------------------------------
 */

static int
ArrayUnsetCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    Tcl_Size objc,
    Tcl_Obj *const objv[])
{
    Var *varPtr, *varPtr2, *protectedVarPtr;
    Tcl_Obj *varNameObj, *patternObj, *nameObj;
    Tcl_HashSearch search;
    const char *pattern;
    int unsetFlags = 0;	/* Should this be TCL_LEAVE_ERR_MSG? */

    Tcl_Interp *interp,		/* Interpreter containing variables. Used for
				 * error messages, too. */
    Var *otherPtr,		/* Pointer to the variable being linked-to. */
    const char *myName,		/* Name of variable which will refer to
				 * otherP1/otherP2. Must be a scalar. */
    int myFlags,		/* 0, TCL_GLOBAL_ONLY or TCL_NAMESPACE_ONLY:
				 * indicates scope of myName. */
    Tcl_Size index)			/* If the variable to be linked is an indexed
				 * scalar, this is its index. Otherwise, -1 */
{
    Tcl_Obj *myNamePtr = NULL;
    int result;

    if (myName) {
	myNamePtr = Tcl_NewStringObj(myName, -1);

 *----------------------------------------------------------------------
 */

int
Tcl_ConstObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Var *varPtr, *arrayPtr;
    Tcl_Obj *part1Ptr;

    if (objc != 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "varName value");

 *----------------------------------------------------------------------
 */

int
Tcl_GlobalObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Interp *iPtr = (Interp *) interp;
    Tcl_Obj *objPtr, *tailPtr;
    const char *varName;
    const char *tail;
    int result;
    Tcl_Size i;

    /*
     * If we are not executing inside a Tcl procedure, just return.
     */

    if (!HasLocalVars(iPtr->varFramePtr)) {
	return TCL_OK;

 *----------------------------------------------------------------------
 */

int
Tcl_VariableObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Interp *iPtr = (Interp *) interp;
    const char *varName, *tail, *cp;
    Var *varPtr, *arrayPtr;
    Tcl_Obj *varValuePtr;
    Tcl_Size i;
    int  result;
    Tcl_Obj *varNamePtr, *tailPtr;

    for (i=1 ; i<objc ; i+=2) {
	/*
	 * Look up each variable in the current namespace context, creating it
	 * if necessary.
	 */

 *----------------------------------------------------------------------
 */

int
Tcl_UpvarObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    CallFrame *framePtr;
    int result, hasLevel;
    Tcl_Obj *levelObj;

    if (objc < 3) {

 *----------------------------------------------------------------------
 */

int
TclInfoVarsCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Interp *iPtr = (Interp *) interp;
    const char *varName, *pattern, *simplePattern;
    Tcl_HashSearch search;
    Var *varPtr;
    Namespace *nsPtr;

 *----------------------------------------------------------------------
 */

int
TclInfoGlobalsCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    const char *varName, *pattern;
    Namespace *globalNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp);
    Tcl_HashSearch search;
    Var *varPtr;
    Tcl_Obj *listPtr, *varNamePtr, *patternPtr;

 *----------------------------------------------------------------------
 */

int
TclInfoLocalsCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Interp *iPtr = (Interp *) interp;
    Tcl_Obj *patternPtr, *listPtr;

    if (objc == 1) {
	patternPtr = NULL;

 *----------------------------------------------------------------------
 */

int
TclInfoConstsCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Interp *iPtr = (Interp *) interp;
    const char *varName, *pattern, *simplePattern;
    Tcl_HashSearch search;
    Var *varPtr;
    Namespace *nsPtr;

 *----------------------------------------------------------------------
 */

int
TclInfoConstantCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Var *varPtr, *arrayPtr;
    int result;

    if (objc != 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "varName");

 *----------------------------------------------------------------------
 */

static int
ArrayDefaultCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    Tcl_Size objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    static const char *const options[] = {
	"get", "set", "exists", "unset", NULL
    };
    enum arrayDefaultOptionsEnum { OPT_GET, OPT_SET, OPT_EXISTS, OPT_UNSET } option;
    Tcl_Obj *arrayNameObj, *defaultValueObj;