/*
 * tclBinary.c --
 *
 *	This file contains the implementation of the "binary" Tcl built-in
 *	command and the Tcl binary data object.
 *
 * Copyright (c) 1997 by Sun Microsystems, Inc.
 * Copyright (c) 1998-1999 by Scriptics Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclBinary.c,v 1.33 2007/02/20 23:24:04 nijtmans Exp $
 * RCS: @(#) $Id: tclBinary.c,v 1.34 2007/03/19 21:00:53 dgp Exp $
 */

#include "tclInt.h"
#include "tclTomMath.h"

#include <math.h>

 */

unsigned char *
Tcl_SetByteArrayLength(
    Tcl_Obj *objPtr,		/* The ByteArray object. */
    int length)			/* New length for internal byte array. */
{
    ByteArray *byteArrayPtr, *newByteArrayPtr;
    ByteArray *byteArrayPtr;

    if (Tcl_IsShared(objPtr)) {
	Tcl_Panic("%s called with shared object", "Tcl_SetByteArrayLength");
    }
    if (objPtr->typePtr != &tclByteArrayType) {
	SetByteArrayFromAny(NULL, objPtr);
    }

    byteArrayPtr = GET_BYTEARRAY(objPtr);
    if (length > byteArrayPtr->allocated) {
	newByteArrayPtr = (ByteArray *) ckalloc(BYTEARRAY_SIZE(length));
	newByteArrayPtr->used = length;
	newByteArrayPtr->allocated = length;
	byteArrayPtr = (ByteArray *) ckrealloc(
		(char *) byteArrayPtr, BYTEARRAY_SIZE(length));
	byteArrayPtr->allocated = length;
	memcpy(newByteArrayPtr->bytes, byteArrayPtr->bytes,
		(size_t) byteArrayPtr->used);
	ckfree((char *) byteArrayPtr);
	byteArrayPtr = newByteArrayPtr;
	SET_BYTEARRAY(objPtr, byteArrayPtr);
    }
    Tcl_InvalidateStringRep(objPtr);
    byteArrayPtr->used = length;
    return byteArrayPtr->bytes;
}