return TCL_OK;

  badChar:
    TclDecrRefCount(resultObj);
    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
	    "invalid hexadecimal digit \"%c\" at position %" TCL_Z_MODIFIER "u",
	    c, data - datastart - 1));
    Tcl_SetErrorCode(interp, "TCL", "BINARY", "DECODE", "INVALID", NULL);
    return TCL_ERROR;
}

/*
 *----------------------------------------------------------------------
 *
 * BinaryEncode64 --
 *
 *	This implements a generic 6 bit binary encoding. Input is broken into
 *	6 bit chunks and a lookup table passed in via clientData is used to
 *	turn these values into output characters. This is used to implement
 *	base64 binary encodings.
 *	This procedure implements the "binary encode base64" Tcl command.
 *
 * Results:
 *	Interp result set to an encoded byte array object
 *	The base64 encoded value prescribed by the input arguments.
 *
 * Side effects:
 *	None
 *
 *----------------------------------------------------------------------
 */

#define OUTPUT(c) \
    do {						\
	*cursor++ = (c);				\

BinaryEncode64(
    TCL_UNUSED(ClientData),
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    Tcl_Obj *resultObj;
    unsigned char *data, *cursor, *limit;
    unsigned char *data, *limit;
    int maxlen = 0;
    const char *wrapchar = "\n";
    size_t wrapcharlen = 1;
    int i, index, size, outindex = 0;
    int wrapcharlen = 1;
    int i, index, size, outindex = 0, purewrap = 1;
    size_t offset, count = 0;
    enum { OPT_MAXLEN, OPT_WRAPCHAR };
    static const char *const optStrings[] = { "-maxlen", "-wrapchar", NULL };

    if (objc < 2 || objc % 2 != 0) {
	Tcl_WrongNumArgs(interp, 1, objv,
		"?-maxlen len? ?-wrapchar char? data");

			"line length out of range", -1));
		Tcl_SetErrorCode(interp, "TCL", "BINARY", "ENCODE",
			"LINE_LENGTH", NULL);
		return TCL_ERROR;
	    }
	    break;
	case OPT_WRAPCHAR:
	    wrapchar = (const char *)TclGetBytesFromObj(NULL,
	    wrapchar = TclGetStringFromObj(objv[i + 1], &wrapcharlen);
	    if (wrapcharlen == 0) {
		maxlen = 0;
		    objv[i + 1], &wrapcharlen);
	    if (wrapchar == NULL) {
		purewrap = 0;
		wrapchar = TclGetStringFromObj(objv[i + 1], &wrapcharlen);
	    }
	    break;
	}
    }
    if (wrapcharlen == 0) {
	maxlen = 0;
    }

    resultObj = Tcl_NewObj();
    data = TclGetByteArrayFromObj(objv[objc - 1], &count);
    if (count > 0) {
	unsigned char *cursor = NULL;

	size = (((count * 4) / 3) + 3) & ~3;	/* ensure 4 byte chunks */
	if (maxlen > 0 && size > maxlen) {
	    int adjusted = size + (wrapcharlen * (size / maxlen));

	    if (size % maxlen == 0) {
		adjusted -= wrapcharlen;
	    }
	    size = adjusted;
	}
	cursor = Tcl_SetByteArrayLength(resultObj, size);

	    if (purewrap == 0) {
		/* Wrapchar is (possibly) non-byte, so build result as
		 * general string, not bytearray */
		Tcl_SetObjLength(resultObj, size);
		cursor = (unsigned char *) TclGetString(resultObj);
	    }
	}
	if (cursor == NULL) {
	    cursor = Tcl_SetByteArrayLength(resultObj, size);
	}
	limit = cursor + size;
	for (offset = 0; offset < count; offset += 3) {
	    unsigned char d[3] = {0, 0, 0};

	    for (i = 0; i < 3 && offset + i < count; ++i) {
		d[i] = data[offset + i];
	    }

    int objc,
    Tcl_Obj *const objv[])
{
    Tcl_Obj *resultObj = NULL;
    unsigned char *data, *datastart, *dataend, c = '\0';
    unsigned char *begin = NULL;
    unsigned char *cursor = NULL;
    int strict = 0;
    int pure = 1, strict = 0;
    int i, index, size, cut = 0;
    size_t count = 0;
    int count = 0;
    Tcl_UniChar ch;
    enum { OPT_STRICT };
    static const char *const optStrings[] = { "-strict", NULL };

    if (objc < 2 || objc > 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "?options? data");
	return TCL_ERROR;
    }
    for (i = 1; i < objc - 1; ++i) {
	if (Tcl_GetIndexFromObj(interp, objv[i], optStrings, "option",
		TCL_EXACT, &index) != TCL_OK) {
	    return TCL_ERROR;
	}
	switch (index) {
	case OPT_STRICT:
	    strict = 1;
	    break;
	}
    }

    TclNewObj(resultObj);
    data = TclGetBytesFromObj(NULL, objv[objc - 1], &count);
    datastart = data = (unsigned char *)
	    TclGetStringFromObj(objv[objc - 1], &count);
    if (data == NULL) {
	pure = 0;
	data = (unsigned char *) TclGetStringFromObj(objv[objc - 1], &count);
    }
    datastart = data;
    dataend = data + count;
    size = ((count + 3) & ~3) * 3 / 4;
    begin = cursor = Tcl_SetByteArrayLength(resultObj, size);
    while (data < dataend) {
	unsigned long value = 0;

	/*

	}
    }
    Tcl_SetByteArrayLength(resultObj, cursor - begin - cut);
    Tcl_SetObjResult(interp, resultObj);
    return TCL_OK;

  bad64:
    {
    if (pure) {
	ch = c;
    } else {
	/* The decoder is byte-oriented. If we saw a byte that's not a
	 * valid member of the base64 alphabet, it could be the lead byte
	 * of a multi-byte character. */
	Tcl_UniChar ch;

	/* Safe because we know data is NUL-terminated */
	TclUtfToUniChar((const char *)(data - 1), &ch);

	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"invalid base64 character \"%c\" at position %"
		TCL_Z_MODIFIER "u", ch, data - datastart - 1));
	TclDecrRefCount(resultObj);
	return TCL_ERROR;
    }

    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
	    "invalid base64 character \"%c\" at position %"
	    TCL_Z_MODIFIER "u", ch, data - datastart - 1));
    Tcl_SetErrorCode(interp, "TCL", "BINARY", "DECODE", "INVALID", NULL);
    TclDecrRefCount(resultObj);
    return TCL_ERROR;
    }
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */