Tcl Source Code

2011-08-10 Alexandre Ferrieux  <[email protected]>

	* generic/tclTestObj.c: [Bug 3386721] Allow multiple [load]ing of
	the Tcltest package

2011-08-09 Alexandre Ferrieux  <[email protected]>

	* generic/tclBasic.c: [Bug 2919042] Restore "valgrindability" of Tcl
	* generic/tclEvent.c: that was lost by the streamlining of [exit], by
	* generic/tclExecute.c: conditionally forcing a full Finalize:
	* generic/tclInt.h:  use -DPURIFY or ::env(TCL_FINALIZE_ON_EXIT)

#ifndef USE_TCL_STUBS
#   define USE_TCL_STUBS
#endif
#include "tclInt.h"
#include "tommath.h"










/*
 * Forward declarations for functions defined later in this file:
 */

static int		CheckIfVarUnset(Tcl_Interp *interp, Tcl_Obj **varPtr, int varIndex);
static int		GetVariableIndex(Tcl_Interp *interp,
			    const char *string, int *indexPtr);
static void		SetVarToObj(Tcl_Obj **varPtr, int varIndex, Tcl_Obj *objPtr);
static int		TestbignumobjCmd(ClientData dummy, Tcl_Interp *interp,
			    int objc, Tcl_Obj *const objv[]);
static int		TestbooleanobjCmd(ClientData dummy,
			    Tcl_Interp *interp, int objc,
			    Tcl_Obj *const objv[]);
static int		TestdoubleobjCmd(ClientData dummy, Tcl_Interp *interp,
			    int objc, Tcl_Obj *const objv[]);

typedef struct TestString {
    int numChars;
    int allocated;
    int maxChars;
    Tcl_UniChar unicode[2];
} TestString;

#define VARPTR_KEY "TCLOBJTEST_VARPTR"
#define NUMBER_OF_OBJECT_VARS 20

static void VarPtrDeleteProc(ClientData clientData, Tcl_Interp *interp)
{
    register int i;
    Tcl_Obj **varPtr = (Tcl_Obj **) clientData;
    for (i = 0;  i < NUMBER_OF_OBJECT_VARS;  i++) {
	if (varPtr[i]) Tcl_DecrRefCount(varPtr[i]);
    }
    Tcl_DeleteAssocData(interp, VARPTR_KEY);
    ckfree(varPtr);
}

static Tcl_Obj **GetVarPtr(Tcl_Interp *interp)
{
    Tcl_InterpDeleteProc *proc;

    return (Tcl_Obj **) Tcl_GetAssocData(interp, VARPTR_KEY, &proc);
}

/*
 *----------------------------------------------------------------------
 *
 * TclObjTest_Init --
 *
 *	This function creates additional commands that are used to test the

 */

int
TclObjTest_Init(
    Tcl_Interp *interp)
{
    register int i;
    /*
     * An array of Tcl_Obj pointers used in the commands that operate on or get
     * the values of Tcl object-valued variables. varPtr[i] is the i-th variable's
     * Tcl_Obj *.
     */
    Tcl_Obj **varPtr;

    varPtr = (Tcl_Obj **) ckalloc(NUMBER_OF_OBJECT_VARS *sizeof(varPtr[0]));
    if (!varPtr) {
	return TCL_ERROR;
    }
    Tcl_SetAssocData(interp, VARPTR_KEY, VarPtrDeleteProc, varPtr);
    for (i = 0;  i < NUMBER_OF_OBJECT_VARS;  i++) {
	varPtr[i] = NULL;
    }

    Tcl_CreateObjCommand(interp, "testbignumobj", TestbignumobjCmd,
	    NULL, NULL);
    Tcl_CreateObjCommand(interp, "testbooleanobj", TestbooleanobjCmd,

    };
    enum options {
	BIGNUM_SET, BIGNUM_GET,	BIGNUM_MULT10,	BIGNUM_DIV10
    };
    int index, varIndex;
    const char *string;
    mp_int bignumValue, newValue;
    Tcl_Obj **varPtr;

    if (objc < 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?");
	return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj(interp, objv[1], subcmds, "option", 0,
	    &index) != TCL_OK) {
	return TCL_ERROR;
    }
    string = Tcl_GetString(objv[2]);
    if (GetVariableIndex(interp, string, &varIndex) != TCL_OK) {
	return TCL_ERROR;
    }
    varPtr = GetVarPtr(interp);

    switch (index) {
    case BIGNUM_SET:
	if (objc != 4) {
	    Tcl_WrongNumArgs(interp, 2, objv, "var value");
	    return TCL_ERROR;
	}

	 * we must create a new object to modify/set and decrement the old
	 * formerly-shared object's ref count. This is "copy on write".
	 */

	if ((varPtr[varIndex] != NULL) && !Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetBignumObj(varPtr[varIndex], &bignumValue);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewBignumObj(&bignumValue));
	}
	break;

    case BIGNUM_GET:
	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "varIndex");
	    return TCL_ERROR;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	break;

    case BIGNUM_MULT10:
	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "varIndex");
	    return TCL_ERROR;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	if (Tcl_GetBignumFromObj(interp, varPtr[varIndex],
		&bignumValue) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (mp_init(&newValue) != MP_OKAY
		|| (mp_mul_d(&bignumValue, 10, &newValue) != MP_OKAY)) {
	    mp_clear(&bignumValue);
	    mp_clear(&newValue);
	    Tcl_SetObjResult(interp,
		    Tcl_NewStringObj("error in mp_mul_d", -1));
	    return TCL_ERROR;
	}
	mp_clear(&bignumValue);
	if (!Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetBignumObj(varPtr[varIndex], &newValue);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewBignumObj(&newValue));
	}
	break;

    case BIGNUM_DIV10:
	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "varIndex");
	    return TCL_ERROR;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	if (Tcl_GetBignumFromObj(interp, varPtr[varIndex],
		&bignumValue) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (mp_init(&newValue) != MP_OKAY
		|| (mp_div_d(&bignumValue, 10, &newValue, NULL) != MP_OKAY)) {
	    mp_clear(&bignumValue);
	    mp_clear(&newValue);
	    Tcl_SetObjResult(interp,
		    Tcl_NewStringObj("error in mp_div_d", -1));
	    return TCL_ERROR;
	}
	mp_clear(&bignumValue);
	if (!Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetBignumObj(varPtr[varIndex], &newValue);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewBignumObj(&newValue));
	}
    }

    Tcl_SetObjResult(interp, varPtr[varIndex]);
    return TCL_OK;
}


    ClientData clientData,	/* Not used. */
    Tcl_Interp *interp,		/* Current interpreter. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    int varIndex, boolValue;
    const char *index, *subCmd;
    Tcl_Obj **varPtr;

    if (objc < 3) {
	wrongNumArgs:
	Tcl_WrongNumArgs(interp, 1, objv, "option arg ?arg ...?");
	return TCL_ERROR;
    }

    index = Tcl_GetString(objv[2]);
    if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	return TCL_ERROR;
    }

    varPtr = GetVarPtr(interp);

    subCmd = Tcl_GetString(objv[1]);
    if (strcmp(subCmd, "set") == 0) {
	if (objc != 4) {
	    goto wrongNumArgs;
	}
	if (Tcl_GetBooleanFromObj(interp, objv[3], &boolValue) != TCL_OK) {

	 * we must create a new object to modify/set and decrement the old
	 * formerly-shared object's ref count. This is "copy on write".
	 */

	if ((varPtr[varIndex] != NULL) && !Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetBooleanObj(varPtr[varIndex], boolValue);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewBooleanObj(boolValue));
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "get") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "not") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	if (Tcl_GetBooleanFromObj(interp, varPtr[varIndex],
				  &boolValue) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (!Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetBooleanObj(varPtr[varIndex], !boolValue);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewBooleanObj(!boolValue));
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else {
	Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
		"bad option \"", Tcl_GetString(objv[1]),
		"\": must be set, get, or not", NULL);
	return TCL_ERROR;

    Tcl_Interp *interp,		/* Current interpreter. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    int varIndex;
    double doubleValue;
    const char *index, *subCmd, *string;
    Tcl_Obj **varPtr;

    if (objc < 3) {
	wrongNumArgs:
	Tcl_WrongNumArgs(interp, 1, objv, "option arg ?arg ...?");
	return TCL_ERROR;
    }

    varPtr = GetVarPtr(interp);

    index = Tcl_GetString(objv[2]);
    if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	return TCL_ERROR;
    }

    subCmd = Tcl_GetString(objv[1]);

	 * must create a new object to modify/set and decrement the old
	 * formerly-shared object's ref count. This is "copy on write".
	 */

	if ((varPtr[varIndex] != NULL) && !Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetDoubleObj(varPtr[varIndex], doubleValue);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewDoubleObj(doubleValue));
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "get") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "mult10") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	if (Tcl_GetDoubleFromObj(interp, varPtr[varIndex],
				 &doubleValue) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (!Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetDoubleObj(varPtr[varIndex], doubleValue * 10.0);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewDoubleObj(doubleValue * 10.0));
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "div10") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	if (Tcl_GetDoubleFromObj(interp, varPtr[varIndex],
		&doubleValue) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (!Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetDoubleObj(varPtr[varIndex], doubleValue / 10.0);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewDoubleObj(doubleValue / 10.0));
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else {
	Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
		"bad option \"", Tcl_GetString(objv[1]),
		"\": must be set, get, mult10, or div10", NULL);
	return TCL_ERROR;

    Tcl_Interp *interp,		/* Current interpreter. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    int intValue, varIndex, i;
    long longValue;
    const char *index, *subCmd, *string;
    Tcl_Obj **varPtr;

    if (objc < 3) {
	wrongNumArgs:
	Tcl_WrongNumArgs(interp, 1, objv, "option arg ?arg ...?");
	return TCL_ERROR;
    }

    varPtr = GetVarPtr(interp);
    index = Tcl_GetString(objv[2]);
    if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	return TCL_ERROR;
    }

    subCmd = Tcl_GetString(objv[1]);
    if (strcmp(subCmd, "set") == 0) {

	 * must create a new object to modify/set and decrement the old
	 * formerly-shared object's ref count. This is "copy on write".
	 */

	if ((varPtr[varIndex] != NULL) && !Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetIntObj(varPtr[varIndex], intValue);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewIntObj(intValue));
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "set2") == 0) { /* doesn't set result */
	if (objc != 4) {
	    goto wrongNumArgs;
	}
	string = Tcl_GetString(objv[3]);
	if (Tcl_GetInt(interp, string, &i) != TCL_OK) {
	    return TCL_ERROR;
	}
	intValue = i;
	if ((varPtr[varIndex] != NULL) && !Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetIntObj(varPtr[varIndex], intValue);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewIntObj(intValue));
	}
    } else if (strcmp(subCmd, "setlong") == 0) {
	if (objc != 4) {
	    goto wrongNumArgs;
	}
	string = Tcl_GetString(objv[3]);
	if (Tcl_GetInt(interp, string, &i) != TCL_OK) {
	    return TCL_ERROR;
	}
	intValue = i;
	if ((varPtr[varIndex] != NULL) && !Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetLongObj(varPtr[varIndex], intValue);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewLongObj(intValue));
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "setmaxlong") == 0) {
	long maxLong = LONG_MAX;
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if ((varPtr[varIndex] != NULL) && !Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetLongObj(varPtr[varIndex], maxLong);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewLongObj(maxLong));
	}
    } else if (strcmp(subCmd, "ismaxlong") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	if (Tcl_GetLongFromObj(interp, varPtr[varIndex], &longValue) != TCL_OK) {
	    return TCL_ERROR;
	}
	Tcl_AppendToObj(Tcl_GetObjResult(interp),
		((longValue == LONG_MAX)? "1" : "0"), -1);
    } else if (strcmp(subCmd, "get") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "get2") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	string = Tcl_GetString(varPtr[varIndex]);
	Tcl_AppendToObj(Tcl_GetObjResult(interp), string, -1);
    } else if (strcmp(subCmd, "inttoobigtest") == 0) {
	/*
	 * If long ints have more bits than ints on this platform, verify that

	}
#if (INT_MAX == LONG_MAX)   /* int is same size as long int */
	Tcl_AppendToObj(Tcl_GetObjResult(interp), "1", -1);
#else
	if ((varPtr[varIndex] != NULL) && !Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetLongObj(varPtr[varIndex], LONG_MAX);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewLongObj(LONG_MAX));
	}
	if (Tcl_GetIntFromObj(interp, varPtr[varIndex], &i) != TCL_OK) {
	    Tcl_ResetResult(interp);
	    Tcl_AppendToObj(Tcl_GetObjResult(interp), "1", -1);
	    return TCL_OK;
	}
	Tcl_AppendToObj(Tcl_GetObjResult(interp), "0", -1);
#endif
    } else if (strcmp(subCmd, "mult10") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	if (Tcl_GetIntFromObj(interp, varPtr[varIndex],
		&intValue) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (!Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetIntObj(varPtr[varIndex], intValue * 10);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewIntObj(intValue * 10));
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "div10") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	if (Tcl_GetIntFromObj(interp, varPtr[varIndex],
		&intValue) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (!Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetIntObj(varPtr[varIndex], intValue / 10);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewIntObj(intValue / 10));
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else {
	Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
		"bad option \"", Tcl_GetString(objv[1]),
		"\": must be set, get, get2, mult10, or div10", NULL);
	return TCL_ERROR;

    };

    const char* index;		/* Argument giving the variable number */
    int varIndex;		/* Variable number converted to binary */
    int cmdIndex;		/* Ordinal number of the subcommand */
    int first;			/* First index in the list */
    int count;			/* Count of elements in a list */
    Tcl_Obj **varPtr;

    if (objc < 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "option arg ?arg...?");
	return TCL_ERROR;
    }
    varPtr = GetVarPtr(interp);
    index = Tcl_GetString(objv[2]);
    if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj(interp, objv[1], subcommands, "command",
			    0, &cmdIndex) != TCL_OK) {
	return TCL_ERROR;
    }
    switch(cmdIndex) {
    case LISTOBJ_SET:
	if ((varPtr[varIndex] != NULL) && !Tcl_IsShared(varPtr[varIndex])) {
	    Tcl_SetListObj(varPtr[varIndex], objc-3, objv+3);
	} else {
	    SetVarToObj(varPtr, varIndex, Tcl_NewListObj(objc-3, objv+3));
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
	break;

    case LISTOBJ_GET:
	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "varIndex");
	    return TCL_ERROR;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	Tcl_SetObjResult(interp, varPtr[varIndex]);
	break;

    case LISTOBJ_REPLACE:
	if (objc < 5) {
	    Tcl_WrongNumArgs(interp, 2, objv,
			     "varIndex start count ?element...?");
	    return TCL_ERROR;
	}
	if (Tcl_GetIntFromObj(interp, objv[3], &first) != TCL_OK
	    || Tcl_GetIntFromObj(interp, objv[4], &count) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (Tcl_IsShared(varPtr[varIndex])) {
	    SetVarToObj(varPtr, varIndex, Tcl_DuplicateObj(varPtr[varIndex]));
	}
	Tcl_ResetResult(interp);
	return Tcl_ListObjReplace(interp, varPtr[varIndex], first, count,
				  objc-5, objv+5);
    }
    return TCL_OK;
}

    Tcl_Interp *interp,		/* Current interpreter. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    int varIndex, destIndex, i;
    const char *index, *subCmd, *string;
    const Tcl_ObjType *targetType;
    Tcl_Obj **varPtr;

    if (objc < 2) {
	wrongNumArgs:
	Tcl_WrongNumArgs(interp, 1, objv, "option arg ?arg ...?");
	return TCL_ERROR;
    }

    varPtr = GetVarPtr(interp);
    subCmd = Tcl_GetString(objv[1]);
    if (strcmp(subCmd, "assign") == 0) {
	if (objc != 4) {
	    goto wrongNumArgs;
	}
	index = Tcl_GetString(objv[2]);
	if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	string = Tcl_GetString(objv[3]);
	if (GetVariableIndex(interp, string, &destIndex) != TCL_OK) {
	    return TCL_ERROR;
	}
	SetVarToObj(varPtr, destIndex, varPtr[varIndex]);
	Tcl_SetObjResult(interp, varPtr[destIndex]);
    } else if (strcmp(subCmd, "convert") == 0) {
	const char *typeName;

	if (objc != 4) {
	    goto wrongNumArgs;
	}
	index = Tcl_GetString(objv[2]);
	if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	typeName = Tcl_GetString(objv[3]);
	if ((targetType = Tcl_GetObjType(typeName)) == NULL) {
	    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
		    "no type ", typeName, " found", NULL);
	    return TCL_ERROR;

	if (objc != 4) {
	    goto wrongNumArgs;
	}
	index = Tcl_GetString(objv[2]);
	if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	string = Tcl_GetString(objv[3]);
	if (GetVariableIndex(interp, string, &destIndex) != TCL_OK) {
	    return TCL_ERROR;
	}
	SetVarToObj(varPtr, destIndex, Tcl_DuplicateObj(varPtr[varIndex]));
	Tcl_SetObjResult(interp, varPtr[destIndex]);
    } else if (strcmp(subCmd, "freeallvars") == 0) {
	if (objc != 2) {
	    goto wrongNumArgs;
	}
	for (i = 0;  i < NUMBER_OF_OBJECT_VARS;  i++) {
	    if (varPtr[i] != NULL) {
		Tcl_DecrRefCount(varPtr[i]);
		varPtr[i] = NULL;
	    }
	}
    } else if (strcmp(subCmd, "invalidateStringRep") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	index = Tcl_GetString(objv[2]);
	if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	Tcl_InvalidateStringRep(varPtr[varIndex]);
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "newobj") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	index = Tcl_GetString(objv[2]);
	if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	    return TCL_ERROR;
	}
	SetVarToObj(varPtr, varIndex, Tcl_NewObj());
	Tcl_SetObjResult(interp, varPtr[varIndex]);
    } else if (strcmp(subCmd, "objtype") == 0) {
	const char *typeName;

	/*
	 * Return an object containing the name of the argument's type of
	 * internal rep. If none exists, return "none".

	if (objc != 3) {
	    goto wrongNumArgs;
	}
	index = Tcl_GetString(objv[2]);
	if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	Tcl_SetObjResult(interp, Tcl_NewIntObj(varPtr[varIndex]->refCount));
    } else if (strcmp(subCmd, "type") == 0) {
	if (objc != 3) {
	    goto wrongNumArgs;
	}
	index = Tcl_GetString(objv[2]);
	if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (CheckIfVarUnset(interp, varPtr,varIndex)) {
	    return TCL_ERROR;
	}
	if (varPtr[varIndex]->typePtr == NULL) { /* a string! */
	    Tcl_AppendToObj(Tcl_GetObjResult(interp), "string", -1);
	} else {
	    Tcl_AppendToObj(Tcl_GetObjResult(interp),
		    varPtr[varIndex]->typePtr->name, -1);

    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Tcl_UniChar *unicode;
    int varIndex, option, i, length;
#define MAX_STRINGS 11
    const char *index, *string, *strings[MAX_STRINGS+1];
    TestString *strPtr;
    Tcl_Obj **varPtr;
    static const char *const options[] = {
	"append", "appendstrings", "get", "get2", "length", "length2",
	"set", "set2", "setlength", "maxchars", "getunicode",
	"appendself", "appendself2", NULL
    };

    if (objc < 3) {
	wrongNumArgs:
	Tcl_WrongNumArgs(interp, 1, objv, "option arg ?arg ...?");
	return TCL_ERROR;
    }

    varPtr = GetVarPtr(interp);
    index = Tcl_GetString(objv[2]);
    if (GetVariableIndex(interp, index, &varIndex) != TCL_OK) {
	return TCL_ERROR;
    }

    if (Tcl_GetIndexFromObj(interp, objv[1], options, "option", 0, &option)
	    != TCL_OK) {
	return TCL_ERROR;
    }
    switch (option) {
	case 0:				/* append */
	    if (objc != 5) {
		goto wrongNumArgs;
	    }
	    if (Tcl_GetIntFromObj(interp, objv[4], &length) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (varPtr[varIndex] == NULL) {
		SetVarToObj(varPtr, varIndex, Tcl_NewObj());
	    }

	    /*
	     * If the object bound to variable "varIndex" is shared, we must
	     * "copy on write" and append to a copy of the object.
	     */

	    if (Tcl_IsShared(varPtr[varIndex])) {
		SetVarToObj(varPtr, varIndex, Tcl_DuplicateObj(varPtr[varIndex]));
	    }
	    string = Tcl_GetString(objv[3]);
	    Tcl_AppendToObj(varPtr[varIndex], string, length);
	    Tcl_SetObjResult(interp, varPtr[varIndex]);
	    break;
	case 1:				/* appendstrings */
	    if (objc > (MAX_STRINGS+3)) {
		goto wrongNumArgs;
	    }
	    if (varPtr[varIndex] == NULL) {
		SetVarToObj(varPtr, varIndex, Tcl_NewObj());
	    }

	    /*
	     * If the object bound to variable "varIndex" is shared, we must
	     * "copy on write" and append to a copy of the object.
	     */

	    if (Tcl_IsShared(varPtr[varIndex])) {
		SetVarToObj(varPtr, varIndex, Tcl_DuplicateObj(varPtr[varIndex]));
	    }
	    for (i = 3;  i < objc;  i++) {
		strings[i-3] = Tcl_GetString(objv[i]);
	    }
	    for ( ; i < 12 + 3; i++) {
		strings[i - 3] = NULL;
	    }
	    Tcl_AppendStringsToObj(varPtr[varIndex], strings[0], strings[1],
		    strings[2], strings[3], strings[4], strings[5],
		    strings[6], strings[7], strings[8], strings[9],
		    strings[10], strings[11]);
	    Tcl_SetObjResult(interp, varPtr[varIndex]);
	    break;
	case 2:				/* get */
	    if (objc != 3) {
		goto wrongNumArgs;
	    }
	    if (CheckIfVarUnset(interp, varPtr,varIndex)) {
		return TCL_ERROR;
	    }
	    Tcl_SetObjResult(interp, varPtr[varIndex]);
	    break;
	case 3:				/* get2 */
	    if (objc != 3) {
		goto wrongNumArgs;
	    }
	    if (CheckIfVarUnset(interp, varPtr, varIndex)) {
		return TCL_ERROR;
	    }
	    string = Tcl_GetString(varPtr[varIndex]);
	    Tcl_AppendToObj(Tcl_GetObjResult(interp), string, -1);
	    break;
	case 4:				/* length */
	    if (objc != 3) {

	     */

	    string = Tcl_GetStringFromObj(objv[3], &length);
	    if ((varPtr[varIndex] != NULL)
		    && !Tcl_IsShared(varPtr[varIndex])) {
		Tcl_SetStringObj(varPtr[varIndex], string, length);
	    } else {
		SetVarToObj(varPtr, varIndex, Tcl_NewStringObj(string, length));
	    }
	    Tcl_SetObjResult(interp, varPtr[varIndex]);
	    break;
	case 7:				/* set2 */
	    if (objc != 4) {
		goto wrongNumArgs;
	    }
	    SetVarToObj(varPtr, varIndex, objv[3]);
	    break;
	case 8:				/* setlength */
	    if (objc != 4) {
		goto wrongNumArgs;
	    }
	    if (Tcl_GetIntFromObj(interp, objv[3], &length) != TCL_OK) {
		return TCL_ERROR;

	    Tcl_GetUnicodeFromObj(varPtr[varIndex], NULL);
	    break;
	case 11:			/* appendself */
	    if (objc != 4) {
		goto wrongNumArgs;
	    }
	    if (varPtr[varIndex] == NULL) {
		SetVarToObj(varPtr, varIndex, Tcl_NewObj());
	    }

	    /*
	     * If the object bound to variable "varIndex" is shared, we must
	     * "copy on write" and append to a copy of the object.
	     */

	    if (Tcl_IsShared(varPtr[varIndex])) {
		SetVarToObj(varPtr, varIndex, Tcl_DuplicateObj(varPtr[varIndex]));
	    }

	    string = Tcl_GetStringFromObj(varPtr[varIndex], &length);

	    if (Tcl_GetIntFromObj(interp, objv[3], &i) != TCL_OK) {
		return TCL_ERROR;
	    }

	    Tcl_SetObjResult(interp, varPtr[varIndex]);
	    break;
	case 12:			/* appendself2 */
	    if (objc != 4) {
		goto wrongNumArgs;
	    }
	    if (varPtr[varIndex] == NULL) {
		SetVarToObj(varPtr, varIndex, Tcl_NewObj());
	    }

	    /*
	     * If the object bound to variable "varIndex" is shared, we must
	     * "copy on write" and append to a copy of the object.
	     */

	    if (Tcl_IsShared(varPtr[varIndex])) {
		SetVarToObj(varPtr, varIndex, Tcl_DuplicateObj(varPtr[varIndex]));
	    }

	    unicode = Tcl_GetUnicodeFromObj(varPtr[varIndex], &length);

	    if (Tcl_GetIntFromObj(interp, objv[3], &i) != TCL_OK) {
		return TCL_ERROR;
	    }

 *	incremented (also if not NULL).
 *
 *----------------------------------------------------------------------
 */

static void
SetVarToObj(
    Tcl_Obj **varPtr,
    int varIndex,		/* Designates the assignment variable. */
    Tcl_Obj *objPtr)		/* Points to object to assign to var. */
{
    if (varPtr[varIndex] != NULL) {
	Tcl_DecrRefCount(varPtr[varIndex]);
    }
    varPtr[varIndex] = objPtr;

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

static int
CheckIfVarUnset(
    Tcl_Interp *interp,		/* Interpreter for error reporting. */
    Tcl_Obj ** varPtr,
    int varIndex)		/* Index of the test variable to check. */
{
    if (varPtr[varIndex] == NULL) {
	char buf[32 + TCL_INTEGER_SPACE];

	sprintf(buf, "variable %d is unset (NULL)", varIndex);
	Tcl_ResetResult(interp);