/*
 * Prototypes for local procedures defined in this file:
 */

static void		DupByteArrayInternalRep(Tcl_Obj *srcPtr,
			    Tcl_Obj *copyPtr);
static void		DupProperByteArrayInternalRep(Tcl_Obj *srcPtr,
			    Tcl_Obj *copyPtr);
static int		FormatNumber(Tcl_Interp *interp, int type,
			    Tcl_Obj *src, unsigned char **cursorPtr);
static void		FreeByteArrayInternalRep(Tcl_Obj *objPtr);
static void		FreeProperByteArrayInternalRep(Tcl_Obj *objPtr);
static int		GetFormatSpec(const char **formatPtr, char *cmdPtr,
			    int *countPtr, int *flagsPtr);
static Tcl_Obj *	ScanNumber(unsigned char *buffer, int type,
			    int flags, Tcl_HashTable **numberCachePtr);
static int		SetByteArrayFromAny(Tcl_Interp *interp,
			    Tcl_Obj *objPtr);
static void		UpdateStringOfByteArray(Tcl_Obj *listPtr);

 * so that Tcl 9 will no longer have any trace of it.  Prescribing a
 * migration path will be the key element of that work.  The internal
 * changes now in place are the limit of what can be done short of
 * interface repair.  They provide a great expansion of the histories
 * over which bytearray values can be useful in the meanwhile.
 */

static const Tcl_ObjType properByteArrayType = {
    "bytearray",
    FreeProperByteArrayInternalRep,
    DupProperByteArrayInternalRep,
    UpdateStringOfByteArray,
    NULL
};

const Tcl_ObjType tclByteArrayType = {
    "bytearray",
    FreeByteArrayInternalRep,

#define BYTEARRAY_SIZE(len) \
		((unsigned) (TclOffset(ByteArray, bytes) + (len)))
#define GET_BYTEARRAY(irPtr) ((ByteArray *) (irPtr)->twoPtrValue.ptr1)
#define SET_BYTEARRAY(irPtr, baPtr) \
		(irPtr)->twoPtrValue.ptr1 = (void *) (baPtr)

int
TclIsPureByteArray(
    Tcl_Obj * objPtr)
{
    return objPtr->typePtr == &properByteArrayType;
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_NewByteArrayObj --
 *
 *	This procedure is creates a new ByteArray object and initializes it
 *	from the given array of bytes.

    byteArrayPtr->allocated = length;

    if ((bytes != NULL) && (length > 0)) {
	memcpy(byteArrayPtr->bytes, bytes, (size_t) length);
    }
    SET_BYTEARRAY(&ir, byteArrayPtr);

    Tcl_StoreIntRep(objPtr, &properByteArrayType, &ir);
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_GetByteArrayFromObj --
 *

unsigned char *
Tcl_GetByteArrayFromObj(
    Tcl_Obj *objPtr,		/* The ByteArray object. */
    int *lengthPtr)		/* If non-NULL, filled with length of the
				 * array of bytes in the ByteArray object. */
{
    ByteArray *baPtr;
    const Tcl_ObjIntRep *irPtr = TclFetchIntRep(objPtr, &properByteArrayType);

    if (irPtr == NULL) {
	irPtr = TclFetchIntRep(objPtr, &tclByteArrayType);
	if (irPtr == NULL) {
	    SetByteArrayFromAny(NULL, objPtr);
	    irPtr = TclFetchIntRep(objPtr, &properByteArrayType);
	    if (irPtr == NULL) {
		irPtr = TclFetchIntRep(objPtr, &tclByteArrayType);
	    }
	}
    }
    baPtr = GET_BYTEARRAY(irPtr);

    assert(length >= 0);
    newLength = (unsigned int)length;

    if (Tcl_IsShared(objPtr)) {
	Tcl_Panic("%s called with shared object", "Tcl_SetByteArrayLength");
    }

    irPtr = TclFetchIntRep(objPtr, &properByteArrayType);
    if (irPtr == NULL) {
	irPtr = TclFetchIntRep(objPtr, &tclByteArrayType);
	if (irPtr == NULL) {
	    SetByteArrayFromAny(NULL, objPtr);
	    irPtr = TclFetchIntRep(objPtr, &properByteArrayType);
	    if (irPtr == NULL) {
		irPtr = TclFetchIntRep(objPtr, &tclByteArrayType);
	    }
	}
    }

    byteArrayPtr = GET_BYTEARRAY(irPtr);

    size_t length;
    int improper = 0;
    const char *src, *srcEnd;
    unsigned char *dst;
    ByteArray *byteArrayPtr;
    Tcl_ObjIntRep ir;

    if (objPtr->typePtr == &properByteArrayType) {
	return TCL_OK;
    }
    if (objPtr->typePtr == &tclByteArrayType) {
	return TCL_OK;
    }

    src = TclGetString(objPtr);

    }

    byteArrayPtr->used = dst - byteArrayPtr->bytes;
    byteArrayPtr->allocated = length;

    SET_BYTEARRAY(&ir, byteArrayPtr);
    Tcl_StoreIntRep(objPtr,
	    improper ? &tclByteArrayType : &properByteArrayType, &ir);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * FreeByteArrayInternalRep --

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

static void
FreeByteArrayInternalRep(
    Tcl_Obj *objPtr)		/* Object with internal rep to free. */
{
    ckfree(GET_BYTEARRAY(TclFetchIntRep(objPtr, &tclByteArrayType)));
}

static void
FreeProperByteArrayInternalRep(
    Tcl_Obj *objPtr)		/* Object with internal rep to free. */
{
    ckfree(GET_BYTEARRAY(TclFetchIntRep(objPtr, &properByteArrayType)));
}

/*
 *----------------------------------------------------------------------
 *
 * DupByteArrayInternalRep --
 *

    Tcl_Obj *srcPtr,		/* Object with internal rep to copy. */
    Tcl_Obj *copyPtr)		/* Object with internal rep to set. */
{
    unsigned int length;
    ByteArray *srcArrayPtr, *copyArrayPtr;
    Tcl_ObjIntRep ir;

    srcArrayPtr = GET_BYTEARRAY(TclFetchIntRep(srcPtr, &tclByteArrayType));
    length = srcArrayPtr->used;

    copyArrayPtr = ckalloc(BYTEARRAY_SIZE(length));
    copyArrayPtr->used = length;
    copyArrayPtr->allocated = length;
    memcpy(copyArrayPtr->bytes, srcArrayPtr->bytes, (size_t) length);

    SET_BYTEARRAY(&ir, copyArrayPtr);
    Tcl_StoreIntRep(copyPtr, &tclByteArrayType, &ir);
}

static void
DupProperByteArrayInternalRep(
    Tcl_Obj *srcPtr,		/* Object with internal rep to copy. */
    Tcl_Obj *copyPtr)		/* Object with internal rep to set. */
{
    unsigned int length;
    ByteArray *srcArrayPtr, *copyArrayPtr;
    Tcl_ObjIntRep ir;

    srcArrayPtr = GET_BYTEARRAY(TclFetchIntRep(srcPtr, &properByteArrayType));
    length = srcArrayPtr->used;

    copyArrayPtr = ckalloc(BYTEARRAY_SIZE(length));
    copyArrayPtr->used = length;
    copyArrayPtr->allocated = length;
    memcpy(copyArrayPtr->bytes, srcArrayPtr->bytes, (size_t) length);

    SET_BYTEARRAY(&ir, copyArrayPtr);
    Tcl_StoreIntRep(copyPtr, &properByteArrayType, &ir);
}

/*
 *----------------------------------------------------------------------
 *
 * UpdateStringOfByteArray --
 *

 */

static void
UpdateStringOfByteArray(
    Tcl_Obj *objPtr)		/* ByteArray object whose string rep to
				 * update. */
{
    const Tcl_ObjIntRep *irPtr = TclFetchIntRep(objPtr, &properByteArrayType);
    ByteArray *byteArrayPtr = GET_BYTEARRAY(irPtr);
    unsigned char *src = byteArrayPtr->bytes;
    unsigned int i, length = byteArrayPtr->used;
    unsigned int size = length;

    /*
     * How much space will string rep need?

    if (len == 0) {
	/* Append zero bytes is a no-op. */
	return;
    }

    length = (unsigned int)len;

    irPtr = TclFetchIntRep(objPtr, &properByteArrayType);
    if (irPtr == NULL) {
	irPtr = TclFetchIntRep(objPtr, &tclByteArrayType);
	if (irPtr == NULL) {
	    SetByteArrayFromAny(NULL, objPtr);
	    irPtr = TclFetchIntRep(objPtr, &properByteArrayType);
	    if (irPtr == NULL) {
		irPtr = TclFetchIntRep(objPtr, &tclByteArrayType);
	    }
	}
    }
    byteArrayPtr = GET_BYTEARRAY(irPtr);