interpsh.c   [plain text]

/*
 * Copyright (c) 2010 Apple Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Inc. ("Apple") nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Portions of this software have been released under the following terms:
 *
 * (c) Copyright 1989-1993 OPEN SOFTWARE FOUNDATION, INC.
 * (c) Copyright 1989-1993 HEWLETT-PACKARD COMPANY
 * (c) Copyright 1989-1993 DIGITAL EQUIPMENT CORPORATION
 *
 * To anyone who acknowledges that this file is provided "AS IS"
 * without any express or implied warranty:
 * permission to use, copy, modify, and distribute this file for any
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 * Packard Company or Digital Equipment Corporation be used
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Novell Inc. nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * @APPLE_LICENSE_HEADER_END@
 */

/*
**      interpsh.c
**
**  FACILITY:
**
**      Interface Definition Language (IDL) Compiler
**
**  ABSTRACT:
**
**      Procedures shared between interpreters
**
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif

#include <dce/idlddefs.h>
#include <lsysdep.h>

/******************************************************************************/
/*                                                                            */
/*  General comments about interpreter structure, variable name, etc.         */
/*                                                                            */
/******************************************************************************/

/*
 *  For a description of the layout of the vectors on which the interpreters
 *  rely, see the MTS*.SDML documents in the RPC$ROOT:[DOC.CMS] CMS library
 */

/*
    A range list is a set of [A, A+B] pairs for a varying array.
*/

/*
    p_...   Signifies a pointer to an object

    IDL_msp         Pointer to the marshalling state block
    add_null        TRUE => marshalling a string to which a null terminator
                        must be explicitly added
    arm_type_ptr    Pointer to union arm type definition
    array_addr      Address of an array
    array_defn_index Index into definition vector for array definition
    array_defn_ptr  Pointer to array definition in definition vector
    array_has_pointers TRUE if the base type of the array includes pointers
    bounds_list     List of lower and upper bounds for an array
    contiguous      TRUE if no gaps in set of array elements
    cs_type_defn_index Index into definition vector for [cs_char] type defn
    cs_type_defn_ptr Pointer to [cs_char] type definition in definition vector
    defn_index      Index into definition vector
    defn_vec_ptr    Pointer to current byte in definition vector
    dimensionality  Number of dimensions of an array
    element_count   Number of elements in an array or array portion
    element_defn_index Index into definition vector for description of array
                                                element which has complex type
    element_defn_ptr  Pointer to description in definition vector of array
                                                element which has complex type
    element_offset_vec_ptr Pointer to the start of the offset vector entries
                            for an array element of complex type
    element_size    Size of an array element
    field_defn_index Index into definition vector for description of field
                                                        which has complex type
    field_defn_ptr  Pointer to description in definition vector of field
                                                        which has complex type
    marshall_by_pointing TRUE if array can be marshalled by pointing
    normal_...      Storage used for array description unless array has more
                        than IDL_NORMAL_DIMS dimensions
    offset_index    Index into offset vector
    offset_vec_ptr  Pointer to current element in offset vector
    param_addr      Address of parameter
    param_index     Index of parameter address in parameter vector
    range_list      List of (A,A+B) pairs determining an array's data limits
    pointee_defn_index Index into definition vector for pointee definition
    pointee_defn_ptr  Pointer to pointee definition in definition vector
    struct_addr     Address of a structure
    struct_defn_index Index into definition vector for structure definition
    struct_defn_ptr Pointer to structure definition in definition vector
    struct_offset_index Index of start of structure offsets in offset vector
    struct_offset_vec_ptr Pointer to the start of the offset vector entries
                            for a structure
    struct_size     Size of a structure
    switch_value    Value of union discriminant
    type_byte       Byte describing type of datum currently being handled
    type_is_modified TRUE if a modifier byte occurred before a type byte
    type_vec_ptr    Pointer to parameter type in type/definition vector
    unmarshall_by_copying TRUE if array can be unmarshalled by copying
    Z_values        List of dimension sizes for conformant array
*/

/******************************************************************************/
/*                                                                            */
/*  Function returning the local size of an object of a specified type        */
/*  For [transmit_as] returns the size of the presented type                  */
/*  For a varying array returns the storage size of the array                 */
/*  For a type which does not have a fixed size, returns 0                    */
/*                                                                            */
/******************************************************************************/
idl_ulong_int rpc_ss_type_size
(
    /* [in] */  idl_byte *defn_vec_ptr, /* Pointer to start of type
                                        specification in definition vector */
    IDL_msp_t IDL_msp
)
{
    idl_byte type;
    idl_ulong_int complex_defn_index; /* Index to description of complex type */
    idl_byte *complex_defn_ptr;     /* Pointer to description of complex type */
    idl_ulong_int offset_index;
    idl_ulong_int array_defn_index;
    idl_byte *array_defn_ptr;
    idl_ulong_int dimensionality;
    idl_ulong_int i;
    idl_ulong_int array_element_count;
    idl_long_int lower_bound;
    idl_long_int upper_bound;

    type = *defn_vec_ptr;
    switch (type)
    {
        case IDL_DT_BOOLEAN:
            return(sizeof(idl_boolean));
        case IDL_DT_BYTE:
            return(sizeof(idl_byte));
        case IDL_DT_CHAR:
            return(sizeof(idl_char));
        case IDL_DT_DOUBLE:
            return(sizeof(idl_long_float));
        case IDL_DT_ENUM:
        case IDL_DT_V1_ENUM:
            return(sizeof(int));
        case IDL_DT_FLOAT:
            return(sizeof(idl_short_float));
        case IDL_DT_SMALL:
                return(sizeof(idl_small_int));
        case IDL_DT_SHORT:
            return(sizeof(idl_short_int));
        case IDL_DT_LONG:
            return(sizeof(idl_long_int));
        case IDL_DT_HYPER:
            return(sizeof(idl_hyper_int));
        case IDL_DT_USMALL:
                return(sizeof(idl_usmall_int));
        case IDL_DT_USHORT:
                return(sizeof(idl_ushort_int));
        case IDL_DT_ULONG:
        case IDL_DT_ERROR_STATUS:
            return(sizeof(idl_ulong_int));
        case IDL_DT_UHYPER:
            return(sizeof(idl_uhyper_int));
        case IDL_DT_FIXED_STRUCT:
        case IDL_DT_ENC_UNION:
        case IDL_DT_TRANSMIT_AS:
        case IDL_DT_REPRESENT_AS:
        case IDL_DT_CS_TYPE:
            defn_vec_ptr += 2;      /* After properties byte */
            IDL_GET_LONG_FROM_VECTOR(complex_defn_index, defn_vec_ptr);
            complex_defn_ptr = IDL_msp->IDL_type_vec + complex_defn_index;
            IDL_GET_LONG_FROM_VECTOR(offset_index, complex_defn_ptr);
            return(*(IDL_msp->IDL_offset_vec + offset_index));
        case IDL_DT_N_E_UNION:
            defn_vec_ptr += 2;      /* After properties byte */
            IDL_DISCARD_LONG_FROM_VECTOR(defn_vec_ptr);  /* Switch index */
            IDL_GET_LONG_FROM_VECTOR(complex_defn_index, defn_vec_ptr);
            complex_defn_ptr = IDL_msp->IDL_type_vec + complex_defn_index;
            IDL_GET_LONG_FROM_VECTOR(offset_index, complex_defn_ptr);
            return(*(IDL_msp->IDL_offset_vec + offset_index));
        case IDL_DT_STRING:
        case IDL_DT_V1_STRING:
            defn_vec_ptr++;
            /* Next byte is DT_VARYING_ARRAY or DT_OPEN_ARRAY */
            type = *defn_vec_ptr;
            /* If it is not DT_OPEN_ARRAY drop through to process it */
            if (type == IDL_DT_OPEN_ARRAY)
                return 0;
        case IDL_DT_FIXED_ARRAY:
        case IDL_DT_VARYING_ARRAY:
            defn_vec_ptr += 2;      /* After properties byte */
            IDL_DISCARD_LONG_FROM_VECTOR(defn_vec_ptr);
            /* Ignore the full array definition and look at the flattened one */
            IDL_GET_LONG_FROM_VECTOR(array_defn_index, defn_vec_ptr);
            array_defn_ptr = IDL_msp->IDL_type_vec + array_defn_index;
            dimensionality = (idl_ulong_int)*array_defn_ptr;
            array_defn_ptr++;
            array_element_count = 1;
            for (i=0; i<dimensionality; i++)
            {
                IDL_GET_LONG_FROM_VECTOR(lower_bound, array_defn_ptr);
                IDL_GET_LONG_FROM_VECTOR(upper_bound, array_defn_ptr);
                array_element_count *= (upper_bound - lower_bound + 1);
            }
            if (type == IDL_DT_VARYING_ARRAY)
                array_defn_ptr += dimensionality * IDL_DATA_LIMIT_PAIR_WIDTH;
            return(array_element_count
                    * rpc_ss_type_size(array_defn_ptr, IDL_msp));
        case IDL_DT_FULL_PTR:
        case IDL_DT_UNIQUE_PTR:
        case IDL_DT_REF_PTR:
            return(sizeof(rpc_void_p_t));
        case IDL_DT_CS_ARRAY:
            /* The size of the array this modifier is attached to */
            return(rpc_ss_type_size(defn_vec_ptr + 1, IDL_msp));
        default:
            return 0;
    }
}

static idl_long_int
interpsh_apply_func_code(byte func_code, idl_long_int size)
{
	idl_long_int calc_size;

	switch(func_code)	{
		/* only "extended" simple expressions for now */
		case IDL_FC_DIV_8:
			calc_size = size / 8;
			break;
		case IDL_FC_MUL_8:
			calc_size = size * 8;
			break;
		case IDL_FC_DIV_4:
			calc_size = size / 4;
			break;
		case IDL_FC_MUL_4:
			calc_size = size * 4;
			break;
		case IDL_FC_DIV_2:
			calc_size = size / 2;
			break;
		case IDL_FC_MUL_2:
			calc_size = size * 2;
			break;
		case IDL_FC_SUB_1:
			calc_size = size - 1;
			break;
		case IDL_FC_ADD_1:
			calc_size = size + 1;
			break;
		case IDL_FC_ALIGN_2:
			calc_size = (size+1) & ~1;
			break;
		case IDL_FC_ALIGN_4:
			calc_size = (size+3) & ~3;
			break;
		case IDL_FC_ALIGN_8:
			calc_size = (size+7) & ~7;
			break;
		case IDL_FC_NONE:
		default:
			calc_size = size;
			break;
	}
	return calc_size;
}

/******************************************************************************/
/*                                                                            */
/*  Clean up after NDR marshalling                                            */
/*                                                                            */
/******************************************************************************/
void rpc_ss_ndr_clean_up
(
    IDL_ms_t *IDL_msp
)
{
    unsigned32 i;

    /* Clean up marshalling state */
    if (IDL_msp->IDL_buff_addr != NULL
        && IDL_msp->IDL_stack_packet_status != IDL_stack_packet_in_use_k)
    {
        free(IDL_msp->IDL_buff_addr);
        IDL_msp->IDL_buff_addr = NULL;
    }
    for (i=0; i<IDL_msp->IDL_elts_in_use; i++)
    {
        if (IDL_msp->IDL_iovec.elt[i].buff_dealloc != NULL)
        {
            (*IDL_msp->IDL_iovec.elt[i].buff_dealloc)
                                (IDL_msp->IDL_iovec.elt[i].buff_addr);
            IDL_msp->IDL_iovec.elt[i].buff_dealloc = NULL;
        }
    }

    /* Clean up unmarshalling state */
    if (IDL_msp->IDL_elt_p != NULL)
    {
        if ((IDL_msp->IDL_elt_p->buff_dealloc != NULL)
                && (IDL_msp->IDL_elt_p->data_len != 0))
            (*IDL_msp->IDL_elt_p->buff_dealloc)(IDL_msp->IDL_elt_p->buff_addr);
        IDL_msp->IDL_elt_p = NULL;
    }
}

/******************************************************************************/
/*                                                                            */
/*  Create a set of Z values from a list of bounds values                     */
/*                                                                            */
/******************************************************************************/
void rpc_ss_Z_values_from_bounds
(
    /* [in] */  IDL_bound_pair_t *bounds_list,
    /* [in] */  idl_ulong_int dimensionality,
    /* [out] */ idl_ulong_int **p_Z_values,
    IDL_msp_t IDL_msp
)
{
    idl_ulong_int *Z_values;
    unsigned32 i;

    if (*p_Z_values == NULL)
    {
        Z_values = (idl_ulong_int *)rpc_ss_mem_alloc
             (&IDL_msp->IDL_mem_handle, dimensionality * sizeof(idl_ulong_int));
        *p_Z_values = Z_values;
    }
    else
        Z_values = *p_Z_values;
    for (i=0; i<dimensionality; i++)
    {
        if (bounds_list[i].upper >= bounds_list[i].lower)
            Z_values[i] = bounds_list[i].upper - bounds_list[i].lower + 1;
        else
            Z_values[i] = 0;
    }
}

/******************************************************************************/
/*                                                                            */
/*  Determine whether the elements of a varying or conformant array to be     */
/*  un/marshalled are contiguous. If they are, also return the total number   */
/*  of elements, and their starting address                                   */
/*                                                                            */
/******************************************************************************/
void rpc_ss_ndr_contiguous_elt
(
    /* [in] */  idl_ulong_int dimensionality,
    /* [in] */  idl_ulong_int *Z_values,
    /* [in] */  IDL_bound_pair_t *range_list,
    /* [in] */  idl_ulong_int element_size,
    /* [out] */ idl_boolean *p_contiguous,
    /* [out] */ idl_ulong_int *p_element_count,
    /* [out] */ rpc_void_p_t *p_array_addr
)
{
    unsigned i;
    idl_ulong_int element_count;

    element_count = 1;

    for (i=1; i<dimensionality; i++)
    {
        if ( (unsigned32)(range_list[i].upper - range_list[i].lower) != Z_values[i] )
        {
            *p_contiguous = idl_false;
            return;
        }
        element_count *= Z_values[i];
    }

    *p_contiguous = idl_true;
    *p_array_addr = (rpc_void_p_t)((idl_byte *)*p_array_addr
                         + range_list[0].lower * element_count * element_size);
    *p_element_count = element_count
                             * (range_list[0].upper - range_list[0].lower);
}

/******************************************************************************/
/*                                                                            */
/*  Alignment operations and optimizing flag for array un/marshalling         */
/*                                                                            */
/******************************************************************************/
void rpc_ss_ndr_arr_align_and_opt
(
    /* [in] */  IDL_mar_or_unmar_k_t marsh_or_unmar,
    /* [in] */  idl_ulong_int dimensionality ATTRIBUTE_UNUSED,
    /* [out] */ idl_byte *p_base_type,
    /* [in] */ idl_byte *defn_vec_ptr,   /* Points to array base info */
    /* [out] */ idl_boolean *p_optimize,
    IDL_msp_t IDL_msp
)
{
    idl_byte base_type;
    idl_ulong_int defn_index;
    idl_ulong_int pipe_arr_dims;
                /* Number of dims of array which is base type of a pipe */
    idl_ulong_int struct_defn_index;
    idl_byte *struct_defn_ptr;

    *p_optimize = idl_false;
    *p_base_type = *defn_vec_ptr;

    base_type = *p_base_type;
    if (base_type == IDL_DT_FIXED_ARRAY)
    {
        /* Base type of a pipe is an array. Find its base type */
        IDL_DISCARD_LONG_FROM_VECTOR( defn_vec_ptr );    /* Full array defn */
        IDL_GET_LONG_FROM_VECTOR( defn_index, defn_vec_ptr );
        defn_vec_ptr = IDL_msp->IDL_type_vec + defn_index;
        pipe_arr_dims = (idl_ulong_int)*defn_vec_ptr;
        defn_vec_ptr++;     /* By design this achieves 4-byte alignment */
        defn_vec_ptr += pipe_arr_dims * IDL_FIXED_BOUND_PAIR_WIDTH;
        base_type = *defn_vec_ptr;
    }

    switch( base_type )
    {
#ifdef PACKED_BYTE_ARRAYS
        case IDL_DT_BYTE:
            *p_optimize = idl_true;
            break;
#endif
#ifdef PACKED_CHAR_ARRAYS
        case IDL_DT_CHAR:
            if (marsh_or_unmar == IDL_marshalling_k)
                *p_optimize = idl_true;
            else
                *p_optimize =
                     (IDL_msp->IDL_drep.char_rep == ndr_g_local_drep.char_rep);
            break;
#endif
#ifdef PACKED_SCALAR_ARRAYS
        case IDL_DT_BOOLEAN:
            *p_optimize = idl_true;
            break;
        case IDL_DT_DOUBLE:
            if (marsh_or_unmar == IDL_marshalling_k)
            {
                IDL_MARSH_ALIGN_MP(IDL_msp, 8);
                *p_optimize = idl_true;
            }
            else
            {
                IDL_UNMAR_ALIGN_MP(IDL_msp, 8);
                *p_optimize =
                    ((IDL_msp->IDL_drep.float_rep == ndr_g_local_drep.float_rep)
                    && (IDL_msp->IDL_drep.int_rep == ndr_g_local_drep.int_rep));
            }
            break;
        case IDL_DT_FLOAT:
            if (marsh_or_unmar == IDL_marshalling_k)
            {
                IDL_MARSH_ALIGN_MP(IDL_msp, 4);
                *p_optimize = idl_true;
            }
            else
            {
                IDL_UNMAR_ALIGN_MP(IDL_msp, 4);
                *p_optimize =
                    ((IDL_msp->IDL_drep.float_rep == ndr_g_local_drep.float_rep)
                    && (IDL_msp->IDL_drep.int_rep == ndr_g_local_drep.int_rep));
            }
            break;
        case IDL_DT_SMALL:
        case IDL_DT_USMALL:
            if (marsh_or_unmar == IDL_marshalling_k)
                *p_optimize = idl_true;
            else
                *p_optimize =
                     (IDL_msp->IDL_drep.int_rep == ndr_g_local_drep.int_rep);
            break;
        case IDL_DT_USHORT:
            /* If language is C, drop through */
        case IDL_DT_SHORT:
            if (marsh_or_unmar == IDL_marshalling_k)
            {
                IDL_MARSH_ALIGN_MP(IDL_msp, 2);
                *p_optimize = idl_true;
            }
            else
            {
                IDL_UNMAR_ALIGN_MP(IDL_msp, 2);
                *p_optimize =
                    (IDL_msp->IDL_drep.int_rep == ndr_g_local_drep.int_rep);
            }
            break;
        case IDL_DT_ERROR_STATUS:
            /* If ifdef not active, drop through to next case */
#ifdef IDL_ENABLE_STATUS_MAPPING
            if (marsh_or_unmar == IDL_marshalling_k)
            {
                IDL_MARSH_ALIGN_MP(IDL_msp, 4);
            }
            else
            {
                IDL_UNMAR_ALIGN_MP(IDL_msp, 4);
            }
            break;
#endif
        case IDL_DT_LONG:
        case IDL_DT_ULONG:
            if (marsh_or_unmar == IDL_marshalling_k)
            {
                IDL_MARSH_ALIGN_MP(IDL_msp, 4);
                *p_optimize = idl_true;
            }
            else
            {
                IDL_UNMAR_ALIGN_MP(IDL_msp, 4);
                *p_optimize =
                    (IDL_msp->IDL_drep.int_rep == ndr_g_local_drep.int_rep);
            }
            break;
        case IDL_DT_HYPER:
        case IDL_DT_UHYPER:
            if (marsh_or_unmar == IDL_marshalling_k)
            {
                IDL_MARSH_ALIGN_MP(IDL_msp, 8);
                *p_optimize = idl_true;
            }
            else
            {
                IDL_UNMAR_ALIGN_MP(IDL_msp, 8);
                *p_optimize =
                    (IDL_msp->IDL_drep.int_rep == ndr_g_local_drep.int_rep);
            }
            break;
        case IDL_DT_ENUM:
            if (marsh_or_unmar == IDL_marshalling_k)
            {
                IDL_MARSH_ALIGN_MP(IDL_msp, 2);
                *p_optimize = (sizeof(int) == sizeof(idl_short_int));
            }
            else
            {
                IDL_UNMAR_ALIGN_MP(IDL_msp, 2);
                *p_optimize = (sizeof(int) == sizeof(idl_short_int)) &&
                    (IDL_msp->IDL_drep.int_rep == ndr_g_local_drep.int_rep);
            }
            break;
        case IDL_DT_V1_ENUM:
            if (marsh_or_unmar == IDL_marshalling_k)
            {
                IDL_MARSH_ALIGN_MP(IDL_msp, 4);
                *p_optimize = (sizeof(int) == sizeof(idl_long_int));
            }
            else
            {
                IDL_UNMAR_ALIGN_MP(IDL_msp, 4);
                *p_optimize = (sizeof(int) == sizeof(idl_long_int)) &&
                    (IDL_msp->IDL_drep.int_rep == ndr_g_local_drep.int_rep);
            }
            break;
#endif
        case IDL_DT_FIXED_STRUCT:
            defn_vec_ptr++;     /* Point at properties byte */
            /* Could the structure be relied to be correctly laid out
                in memory on some architecture? */
            if ( ! IDL_PROP_TEST(*defn_vec_ptr, IDL_PROP_MAYBE_WIRE_ALIGNED))
                break;
            if (marsh_or_unmar == IDL_unmarshalling_k)
            {
                /* Can only unmarshall by copying if the drep's for all the
                    fields match */
                if ( IDL_PROP_TEST(*defn_vec_ptr, IDL_PROP_DEP_CHAR)
                        && (IDL_msp->IDL_drep.char_rep
                                                 != ndr_g_local_drep.char_rep) )
                    break;
                if ( IDL_PROP_TEST(*defn_vec_ptr, IDL_PROP_DEP_INT)
                        && (IDL_msp->IDL_drep.int_rep
                                                 != ndr_g_local_drep.int_rep) )
                    break;
                /* For floating point numbers we need the same encoding
                        and the same endianness */
                if ( IDL_PROP_TEST(*defn_vec_ptr, IDL_PROP_DEP_FLOAT)
                        && ((IDL_msp->IDL_drep.float_rep
                                                 != ndr_g_local_drep.float_rep)
                            || (IDL_msp->IDL_drep.int_rep
                                                != ndr_g_local_drep.int_rep)) )
                    break;
            }
            defn_vec_ptr++;     /* Point after properties byte */
            IDL_GET_LONG_FROM_VECTOR(struct_defn_index, defn_vec_ptr);
            struct_defn_ptr = IDL_msp->IDL_type_vec + struct_defn_index;
            IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                          /* Discard index into offset vector */
            /* Because we can't get here for a [v1_struct], the next byte
                    is an alignment byte unless all the fields are 1-byte */
            switch (*struct_defn_ptr)
            {
                case IDL_DT_NDR_ALIGN_8:
#ifdef IDL_NATURAL_ALIGN_8
                    if (marsh_or_unmar == IDL_marshalling_k)
                    {
                        IDL_MARSH_ALIGN_MP(IDL_msp, 8);
                    }
                    else
                    {
                        IDL_UNMAR_ALIGN_MP(IDL_msp, 8);
                    }
                    *p_optimize = idl_true;
#endif
                    break;
                case IDL_DT_NDR_ALIGN_4:
#if defined(IDL_NATURAL_ALIGN_8) || defined(IDL_NATURAL_ALIGN_4)
                    if (marsh_or_unmar == IDL_marshalling_k)
                    {
                        IDL_MARSH_ALIGN_MP(IDL_msp, 4);
                    }
                    else
                    {
                        IDL_UNMAR_ALIGN_MP(IDL_msp, 4);
                    }
                    *p_optimize = idl_true;
#endif
                    break;
                case IDL_DT_NDR_ALIGN_2:
#if defined(IDL_NATURAL_ALIGN_8) || defined(IDL_NATURAL_ALIGN_4)
                    if (marsh_or_unmar == IDL_marshalling_k)
                    {
                        IDL_MARSH_ALIGN_MP(IDL_msp, 2);
                    }
                    else
                    {
                        IDL_UNMAR_ALIGN_MP(IDL_msp, 2);
                    }
                    *p_optimize = idl_true;
#endif
                    break;
                default:
#if defined(IDL_NATURAL_ALIGN_8) || defined(IDL_NATURAL_ALIGN_4) || defined(IDL_NATURAL_ALIGN_1)
                    *p_optimize = idl_true;
#endif
                    break;
            }
            break;
        default:
            break;
    }
}

/******************************************************************************/
/*                                                                            */
/*  Function whose result is the integer that is of the given type at the     */
/*   given address. For use in unions, boolean's, char's and enum's are       */
/*   treated as integers.                                                     */
/*                                                                            */
/******************************************************************************/
idl_long_int rpc_ss_get_typed_integer
(
    /* [in] */  idl_byte type,
    /* [in] */  rpc_void_p_t address,
    IDL_msp_t IDL_msp ATTRIBUTE_UNUSED
)
{
    switch (type)
    {
        case IDL_DT_BOOLEAN:
            return( (idl_long_int)(*(idl_boolean *)address) );
        case IDL_DT_CHAR:
            return( (idl_long_int)(*(idl_char *)address) );
        case IDL_DT_ENUM:
        case IDL_DT_V1_ENUM:
            return( (idl_long_int)(*(int *)address) );
        case IDL_DT_SMALL:
                return( (idl_long_int)(*(idl_small_int *)address) );
        case IDL_DT_SHORT:
            return( (idl_long_int)(*(idl_short_int *)address) );
        case IDL_DT_LONG:
            return( (idl_long_int)(*(idl_long_int *)address) );
        case IDL_DT_USMALL:
                return( (idl_long_int)(*(idl_usmall_int *)address) );
        case IDL_DT_USHORT:
                return( (idl_long_int)(*(idl_ushort_int *)address) );
        case IDL_DT_ERROR_STATUS:
        case IDL_DT_ULONG:
            /* !!! Overflow here if value > 2**31 - 1 !!! */
            return( (idl_long_int)(*(idl_ulong_int *)address) );
        default:
            DCETHREAD_RAISE( rpc_x_coding_error );
    }
}

/******************************************************************************/
/*                                                                            */
/*  Build a bounds list for a conformant or open array                        */
/*                                                                            */
/******************************************************************************/
void rpc_ss_build_bounds_list
(
    /* [in,out] */ idl_byte **p_defn_vec_ptr,
                        /* On entry defn_vec_ptr points to bounds info */
                        /* On exit it points at
                                    conformant array - base type info
                                    open array - data limit info */
    /* [in] */  rpc_void_p_t array_addr,    /* NULL when building bounds list
                                                for a conformant structure */
    /* [in] */  rpc_void_p_t struct_addr,   /* Address of structure that array
                                   is field of. NULL if array is a parameter */
    /* [in] */  idl_ulong_int *struct_offset_vec_ptr,
                                           /*  NULL if array is a parameter */
    /* [in] */  idl_ulong_int dimensionality,
    /* [out] */ IDL_bound_pair_t **p_bounds_list,
    IDL_msp_t IDL_msp
)
{
    return rpc_ss_build_bounds_list_2(p_defn_vec_ptr, array_addr, struct_addr,
                                      struct_offset_vec_ptr, dimensionality,
                                      NULL, p_bounds_list, IDL_msp);
}

/******************************************************************************/
/*                                                                            */
/*  Build a bounds list for a conformant or open array, with an optional      */
/*  bitmap indicating whether correlated arguments are yet to be unmarshalled */
/*                                                                            */
/******************************************************************************/
void rpc_ss_build_bounds_list_2
(
    /* [in,out] */ idl_byte **p_defn_vec_ptr,
                        /* On entry defn_vec_ptr points to bounds info */
                        /* On exit it points at
                                    conformant array - base type info
                                    open array - data limit info */
    /* [in] */  rpc_void_p_t array_addr,    /* NULL when building bounds list
                                                for a conformant structure */
    /* [in] */  rpc_void_p_t struct_addr,   /* Address of structure that array
                                   is field of. NULL if array is a parameter */
    /* [in] */  idl_ulong_int *struct_offset_vec_ptr,
                                           /*  NULL if array is a parameter */
    /* [in] */  idl_ulong_int dimensionality,
    /* [in] */  idl_boolean *unmarshalled_list, /* NULL if marshalling */
    /* [out] */ IDL_bound_pair_t **p_bounds_list,
    IDL_msp_t IDL_msp
)
{
    IDL_bound_pair_t *bounds_list;
    idl_byte *defn_vec_ptr = *p_defn_vec_ptr;
    idl_byte bound_kind, bound_type;
    unsigned32 i;
    idl_long_int size;
    idl_ulong_int element_size;     /* Size of base type of string */
    idl_ulong_int attribute_index;
    rpc_void_p_t bound_addr;
    idl_ulong_int string_field_offset;  /* Offset index for string field */
	byte func_code = 0;

    if (*p_bounds_list == NULL)
    {
        bounds_list = (IDL_bound_pair_t *)rpc_ss_mem_alloc
          (&IDL_msp->IDL_mem_handle, dimensionality * sizeof(IDL_bound_pair_t));
        *p_bounds_list = bounds_list;
    }
    else
        bounds_list = *p_bounds_list;

    for (i = 0; i < dimensionality; i++)
    {
        /* Get lower bound */
        bound_kind = (*defn_vec_ptr & IDL_BOUND_TYPE_MASK);
        defn_vec_ptr++;
        if (bound_kind == IDL_BOUND_FIXED)
        {
            IDL_GET_LONG_FROM_VECTOR(bounds_list[i].lower, defn_vec_ptr);
        }
        else
        {
            /* Lower bound is [min_is] */
            bound_type = *defn_vec_ptr;
            defn_vec_ptr++;
            IDL_GET_LONG_FROM_VECTOR(attribute_index, defn_vec_ptr);
            if (unmarshalled_list == NULL || unmarshalled_list[i])
            {
                if (struct_addr == NULL)
                    bound_addr = IDL_msp->IDL_param_vec[attribute_index];
                else
                {
                    bound_addr = (rpc_void_p_t)
                            ((idl_byte *)struct_addr
                                     + struct_offset_vec_ptr[attribute_index]);
                }
                bounds_list[i].lower =
                             rpc_ss_get_typed_integer( bound_type, bound_addr,
                                                         IDL_msp );
            }
            else
                bounds_list[i].lower = -1;
        }

        /* Get upper bound */
        bound_kind = (*defn_vec_ptr & IDL_BOUND_TYPE_MASK);
        defn_vec_ptr++;
        if (bound_kind == IDL_BOUND_FIXED)
        {
            IDL_GET_LONG_FROM_VECTOR(bounds_list[i].upper, defn_vec_ptr);
        }
        else if (bound_kind == IDL_BOUND_STRING)
        {
            element_size = (idl_ulong_int)*defn_vec_ptr;
            defn_vec_ptr++;
            IDL_GET_LONG_FROM_VECTOR(string_field_offset, defn_vec_ptr);
                        /* Value is only used in conformant struct size case */
            if (unmarshalled_list == NULL || unmarshalled_list[i])
            {
                if (array_addr == NULL)
                {
                    /* Conformant field of conformant structure
                        has size determined by [string] */
                    array_addr = (rpc_void_p_t)((idl_byte *)struct_addr
                                                    + *(struct_offset_vec_ptr
                                                            + string_field_offset));
                }
                if (element_size == 1)
                    bounds_list[i].upper = bounds_list[i].lower
                                                             + (idl_long_int) strlen(array_addr);
                else
                {
                    size = rpc_ss_strsiz( (idl_char *)array_addr, element_size );
                    bounds_list[i].upper = bounds_list[i].lower + size - 1;
                }
            }
            else
                bounds_list[i].upper = -1;
        }
        else
        {
            if (bound_kind == IDL_BOUND_SIZE_IS)
            {
                func_code = *defn_vec_ptr;
                defn_vec_ptr++;
            }
            /* Upper bound is [max_is] or [size_is] */
            bound_type = *defn_vec_ptr;
            defn_vec_ptr++;
            IDL_GET_LONG_FROM_VECTOR(attribute_index, defn_vec_ptr);
            if (unmarshalled_list == NULL || unmarshalled_list[i])
            {
                if (struct_addr == NULL)
                    bound_addr = IDL_msp->IDL_param_vec[attribute_index];
                else
                {
                    bound_addr = (rpc_void_p_t)
                            ((idl_byte *)struct_addr
                                     + struct_offset_vec_ptr[attribute_index]);
                }
                if (bound_kind == IDL_BOUND_MAX_IS)
                    bounds_list[i].upper =
                             rpc_ss_get_typed_integer( bound_type, bound_addr,
                                                        IDL_msp );
                else /* IDL_BOUND_SIZE_IS */
                {
                    size = rpc_ss_get_typed_integer( bound_type, bound_addr,
                                                        IDL_msp );

                    bounds_list[i].upper = bounds_list[i].lower +
                             interpsh_apply_func_code(func_code, size) - 1;
                }
            }
            else
                bounds_list[i].upper = -1;
        }
        /* Inside out bounds mean "no elements". Store value which will
            yield 0 in subsequent calculations */
        if (bounds_list[i].upper < bounds_list[i].lower)
            bounds_list[i].upper = bounds_list[i].lower - 1;
    }

    *p_defn_vec_ptr = defn_vec_ptr;
}

/******************************************************************************/
/*                                                                            */
/*  A range list is a set of [A, A+B] pairs for a varying array. Build one.   */
/*  Note that A is the difference between the lower bound and the index of    */
/*  the first element in the dimension to be shipped. B is the number of      */
/*  elements in that dimension to be shipped.                                 */
/*                                                                            */
/******************************************************************************/
void rpc_ss_build_range_list
(
    /* [in,out] */ idl_byte **p_defn_vec_ptr,
    /* [in] */  rpc_void_p_t array_addr,  /* Only used if [string] data limit */
    /* [in] */  rpc_void_p_t struct_addr,   /* Address of structure array is a
                                 field of. NULL if array is a parameter */
    /* [in] */  idl_ulong_int *struct_offset_vec_ptr,
                                           /*  NULL if array is a parameter */
    /* [in] */  idl_ulong_int dimensionality,
    /* [in] */  IDL_bound_pair_t *bounds_list,
    /* [out] */ IDL_bound_pair_t **p_range_list,
    /* [out] */ idl_boolean *p_add_null,
    IDL_msp_t IDL_msp
)
{
    return rpc_ss_build_range_list_2(p_defn_vec_ptr, array_addr, struct_addr,
                                     struct_offset_vec_ptr, dimensionality,
                                     bounds_list, NULL, p_range_list, p_add_null,
                                     IDL_msp);
}

/******************************************************************************/
/*                                                                            */
/*  A range list is a set of [A, A+B] pairs for a varying array. Build one,   */
/*  with an optoinal bitmap indicating whether correlated arguments are yet   */
/*  to be unmarshalled.                                                       */
/*  Note that A is the difference between the lower bound and the index of    */
/*  the first element in the dimension to be shipped. B is the number of      */
/*  elements in that dimension to be shipped.                                 */
/*                                                                            */
/******************************************************************************/
void rpc_ss_build_range_list_2
(
    /* [in,out] */ idl_byte **p_defn_vec_ptr,
    /* [in] */  rpc_void_p_t array_addr,  /* Only used if [string] data limit */
    /* [in] */  rpc_void_p_t struct_addr,   /* Address of structure array is a
                                 field of. NULL if array is a parameter */
    /* [in] */  idl_ulong_int *struct_offset_vec_ptr,
                                           /*  NULL if array is a parameter */
    /* [in] */  idl_ulong_int dimensionality,
    /* [in] */  IDL_bound_pair_t *bounds_list,
    /* [in] */  idl_boolean *unmarshalled_list, /* NULL if marshalling */
    /* [out] */ IDL_bound_pair_t **p_range_list,
    /* [out] */ idl_boolean *p_add_null,
    IDL_msp_t IDL_msp
)
{
    IDL_bound_pair_t *range_list;
    idl_byte *defn_vec_ptr = *p_defn_vec_ptr;
    idl_byte limit_kind, limit_type;
    unsigned32 i;
    idl_long_int data_limit;
    idl_ulong_int element_size;     /* Size of base type of string */
    idl_ulong_int attribute_index;
    rpc_void_p_t limit_addr;
    byte func_code = 0;

    *p_add_null = idl_false;
    if (*p_range_list == NULL)
    {
        range_list = (IDL_bound_pair_t *)rpc_ss_mem_alloc
          (&IDL_msp->IDL_mem_handle, dimensionality * sizeof(IDL_bound_pair_t));
        *p_range_list = range_list;
    }
    else
        range_list = *p_range_list;

    for (i=0; i<dimensionality; i++)
    {
        /* Get lower data limit */
        limit_kind = (*defn_vec_ptr & IDL_LIMIT_TYPE_MASK);
        defn_vec_ptr++;
        if (limit_kind == IDL_LIMIT_FIXED)
        {
            IDL_GET_LONG_FROM_VECTOR(data_limit, defn_vec_ptr);
        }
        else
        {
            /* Lower data limit is [first_is] */
            limit_type = *defn_vec_ptr;
            defn_vec_ptr++;
            IDL_GET_LONG_FROM_VECTOR(attribute_index, defn_vec_ptr);
            if (unmarshalled_list == NULL || unmarshalled_list[i])
            {
                if (struct_addr == NULL)
                    limit_addr = IDL_msp->IDL_param_vec[attribute_index];
                else
                {
                    limit_addr = (rpc_void_p_t)
                            ((idl_byte *)struct_addr
                                     + struct_offset_vec_ptr[attribute_index]);
                }
                data_limit = rpc_ss_get_typed_integer( limit_type, limit_addr,
                                                        IDL_msp );
            }
        }

        if (unmarshalled_list == NULL || unmarshalled_list[i])
        {
            range_list[i].lower = data_limit - bounds_list[i].lower;
            if (range_list[i].lower < 0)
                DCETHREAD_RAISE( rpc_x_invalid_bound );
        }
        else
            range_list[i].lower = -1;

        /* Get upper data limit */
        limit_kind = (*defn_vec_ptr & IDL_LIMIT_TYPE_MASK);
        defn_vec_ptr++;
        if (limit_kind == IDL_LIMIT_FIXED)
        {
            IDL_GET_LONG_FROM_VECTOR(data_limit, defn_vec_ptr);
            range_list[i].upper = data_limit + 1 - bounds_list[i].lower;
        }
        else if (limit_kind == IDL_LIMIT_STRING)
        {
            element_size = (idl_ulong_int)*defn_vec_ptr;
            /* Element size byte is discarded as we align to discard dummy
                longword */
            IDL_DISCARD_LONG_FROM_VECTOR(defn_vec_ptr);
            if (unmarshalled_list == NULL || unmarshalled_list[i])
            {
                if (element_size == 1)
                    data_limit = (idl_long_int) strlen(array_addr) + 1;
                else
                    data_limit = rpc_ss_strsiz( (idl_char *)array_addr,
                                                                 element_size );
                range_list[i].upper = range_list[i].lower + data_limit;
                if ( ! (*p_add_null) )
                {
                    if ( range_list[i].upper > (bounds_list[i].upper
                                            - bounds_list[i].lower + 1) )
                        DCETHREAD_RAISE( rpc_x_invalid_bound );
                }
            }
            else
                range_list[i].upper = -1;
        }
        else if (limit_kind == IDL_LIMIT_UPPER_CONF)
        {
            /* Dummy type byte is discarded as we align to discard dummy
                longword */
            IDL_DISCARD_LONG_FROM_VECTOR( defn_vec_ptr );
            range_list[i].upper =
                                bounds_list[i].upper - bounds_list[i].lower + 1;
        }
        else
        {
            /* Upper data limit is [last_is] or [length_is] */
            if (limit_kind == IDL_LIMIT_LENGTH_IS)
            {
                func_code = *defn_vec_ptr;
                defn_vec_ptr++;
            }

            limit_type = *defn_vec_ptr;
            defn_vec_ptr++;
            IDL_GET_LONG_FROM_VECTOR(attribute_index, defn_vec_ptr);
            if (unmarshalled_list == NULL || unmarshalled_list[i])
            {
                if (struct_addr == NULL)
                    limit_addr = IDL_msp->IDL_param_vec[attribute_index];
                else
                {
                    limit_addr = (rpc_void_p_t)
                            ((idl_byte *)struct_addr
                                     + struct_offset_vec_ptr[attribute_index]);
                }
                data_limit = rpc_ss_get_typed_integer( limit_type, limit_addr,
                                                       IDL_msp );
                if (limit_kind == IDL_LIMIT_LENGTH_IS)
                {
                    range_list[i].upper = range_list[i].lower + interpsh_apply_func_code(func_code, data_limit);
                }
                else
                {
                    range_list[i].upper = data_limit - bounds_list[i].lower + 1;
                }
                if ( range_list[i].upper > (bounds_list[i].upper
                                            - bounds_list[i].lower + 1) )
                    DCETHREAD_RAISE( rpc_x_invalid_bound );
            }
            else
                range_list[i].upper = -1;
        }
#ifdef DEBUG_INTERP
        if (unmarshalled_list == NULL || unmarshalled_list[i])
            printf("dim %lu range upr: %ld lwr: %ld func: %d\n", i,
                   range_list[i].upper, range_list[i].lower, func_code);
#endif
        /* Inside out limits mean "transmit no elements" */
        if (range_list[i].upper < range_list[i].lower)
            range_list[i].upper = range_list[i].lower;
    }

    *p_defn_vec_ptr = defn_vec_ptr;
}

/******************************************************************************/
/*                                                                            */
/*  Get the size of string storage for the base type of an array of string    */
/*  and the index value of the start of the string's array description        */
/*                                                                            */
/******************************************************************************/
void rpc_ss_get_string_base_desc
(
    /* [in] */  idl_byte *defn_vec_ptr, /* Pointer to DT_STRING in base type
                                        specification in definition vector */
    /* [out] */ idl_ulong_int *p_array_size,
    /* [out] */ idl_ulong_int *p_array_defn_index,
    IDL_msp_t IDL_msp
)
{
    idl_byte *array_defn_ptr;
    idl_long_int string_lower_bound, string_upper_bound;
    idl_ulong_int array_element_count;

    defn_vec_ptr += 3;  /* DT_STRING, DT_VARYING_ARRAY, properties */
    IDL_DISCARD_LONG_FROM_VECTOR(defn_vec_ptr);
    /* Ignore the full array definition and look at the flattened one */
    IDL_GET_LONG_FROM_VECTOR(*p_array_defn_index, defn_vec_ptr);
    array_defn_ptr = IDL_msp->IDL_type_vec + *p_array_defn_index;
    array_defn_ptr++;   /* Discard dimensionality */
    IDL_GET_LONG_FROM_VECTOR(string_lower_bound, array_defn_ptr);
    IDL_GET_LONG_FROM_VECTOR(string_upper_bound, array_defn_ptr);
    array_element_count = string_upper_bound - string_lower_bound + 1;
    *p_array_size =
            array_element_count * IDL_DATA_LIMIT_PAIR_CHAR_SIZE(array_defn_ptr);
}

/******************************************************************************/
/*                                                                            */
/*  Point at the union arm definition for the supplied switch value           */
/*  Returns FALSE if there is no match, TRUE otherwise                        */
/*                                                                            */
/******************************************************************************/
idl_boolean rpc_ss_find_union_arm_defn
(
    /* [in] */ idl_byte *defn_vec_ptr,    /* Points at first union arm defn */
    /* [in] */ idl_ulong_int arm_count,   /* Number of non-default arms */
    /* [in] */ idl_ulong_int switch_value,  /* to be matched */
    /* [out] */ idl_byte **p_arm_type_ptr,
                    /* Pointer to type part of arm with matching switch value */
    /* [in] */ IDL_msp_t IDL_msp
                    /* marshall state ptr needed for IDL_ARM macro */
)
{
    idl_long_int low, mid, high;         /* Element indices */
    idl_ulong_int arm_switch_value;       /* To test supplied value against */

    /* If there are no elements to search, then return no match found. */

    if (arm_count == 0)
        return(idl_false);

    /* Initialize the search interval to include all elements. */

    low = 0;
    high = arm_count - 1;

    /*  Loop, computing the midpoint element and comparing it to the desired
         element until a match is found or all elements are exhausted.
         Note that the midpoint index by convention is always
         rounded down if there is a remainder after division.
     */
    do {
        mid = (low + high) / 2;         /* Compute midpoint element */
        arm_switch_value = IDL_ARM_SWITCH_VALUE(defn_vec_ptr, mid);
        if (switch_value > arm_switch_value)
        {
            /* If element is beyond the midpoint */
            low = mid + 1;              /*  adjust low index past midpoint */
        }
        else if (switch_value < arm_switch_value)
        {
            /* If element is prior to the midpoint */
            high = mid - 1;         /*  adjust high index below midpoint */
        }
        else
            break;                  /* Otherwise, element was found! */
    } while (high >= low);

    if (high >= low)
    {
        /* Match was found - point at arm that matched */
        *p_arm_type_ptr = defn_vec_ptr + mid * IDL_UNION_ARM_DESC_WIDTH;
        /* Advance pointer over switch value */
        IDL_DISCARD_LONG_FROM_VECTOR( *p_arm_type_ptr );
        return(idl_true);
    }
    else
        return(idl_false);
}

/******************************************************************************/
/*                                                                            */
/*  Get, from data in memory, the value of the discriminant of a              */
/*      non-encapsulated union                                                */
/*                                                                            */
/******************************************************************************/
void rpc_ss_get_switch_from_data
(
    /* [in] */ idl_ulong_int switch_index,
                /* If union is parameter, index in param list of discriminant */
                /* If union is field, index in offset list for discriminant */
    /* [in] */ idl_byte switch_type,
    /* [in] */ rpc_void_p_t struct_addr,     /* Address of structure union is
                                        field of. NULL if union is parameter */
    /* [in] */ idl_ulong_int *struct_offset_vec_ptr,
                                                /* NULL if union is parameter */
    /* [out] */ idl_ulong_int *p_switch_value,
    IDL_msp_t IDL_msp
)
{
    rpc_void_p_t switch_addr;

    if ( struct_addr == NULL )
        switch_addr = IDL_msp->IDL_param_vec[switch_index];
    else
        switch_addr = (rpc_void_p_t)((idl_byte *)struct_addr
                                       + struct_offset_vec_ptr[switch_index]);

    *p_switch_value = rpc_ss_get_typed_integer( switch_type, switch_addr,
                                                    IDL_msp );
}

/******************************************************************************/
/*                                                                            */
/*  Return TRUE if a -bug flag in the range 1-31 is set                       */
/*                                                                            */
/******************************************************************************/
idl_boolean rpc_ss_bug_1_thru_31
(
    /* [in] */ idl_ulong_int bug_mask,
    IDL_msp_t IDL_msp
)
{
    idl_byte *defn_vec_ptr;
    idl_ulong_int defn_index;
    idl_ulong_int flags;

    /* Get position of bug flags */
    defn_vec_ptr = IDL_msp->IDL_type_vec + 40;
    IDL_GET_LONG_FROM_VECTOR( defn_index, defn_vec_ptr );

    /* Get flags longword for bugs 1-31 */
    defn_vec_ptr = IDL_msp->IDL_type_vec + defn_index;
    IDL_GET_LONG_FROM_VECTOR( flags, defn_vec_ptr );

    return( (flags & bug_mask) != 0 );
}

/******************************************************************************/
/*                                                                            */
/*  If -bug 1 is set and we are marshalling a [v1_array] with no elements,    */
/*  alignment must be forced to the last scalar that would have been          */
/*  marshalled if we had marshalled an array element.                         */
/*  This function returns the alignment to be applied.                        */
/*                                                                            */
/******************************************************************************/
idl_ulong_int rpc_ss_ndr_bug_1_align
(
    /* [in] */ idl_byte *defn_vec_ptr,     /* Points at array base type unless
                        in recursive call. In recursive call, points at defn
                        of structure field, union arm, or transmitted type */
    IDL_msp_t IDL_msp
)
{
    idl_ulong_int defn_index;
    idl_byte *struct_defn_ptr;
    idl_byte *last_field_defn_ptr = NULL;  /* Points to the definition of the last
                                        field of a structure */
    idl_byte type_byte;
    idl_ulong_int array_defn_index;
    idl_byte *array_defn_ptr;
    idl_ulong_int dimensionality;
    idl_byte *union_defn_ptr;
    idl_ulong_int arm_count;
    idl_ulong_int min_union_align;  /* Minimum alignment forced by any
                                                                union arm */
    idl_ulong_int arm_align;       /* Alignment for last field of current arm */
    unsigned32 i;

    type_byte = *defn_vec_ptr;
    switch (type_byte)
    {
        case IDL_DT_BYTE:
        case IDL_DT_CHAR:
        case IDL_DT_BOOLEAN:
        case IDL_DT_SMALL:
        case IDL_DT_USMALL:
            return 1;
        case IDL_DT_SHORT:
        case IDL_DT_USHORT:
            return 2;
        case IDL_DT_FLOAT:
        case IDL_DT_LONG:
        case IDL_DT_ULONG:
        case IDL_DT_V1_ENUM:
        case IDL_DT_ERROR_STATUS:
            return 4;
        case IDL_DT_DOUBLE:
        case IDL_DT_HYPER:
        case IDL_DT_UHYPER:
            return 8;
        case IDL_DT_FIXED_STRUCT:
            /* Structure analysis follows switch statement */
            break;
        case IDL_DT_FIXED_ARRAY:
        case IDL_DT_VARYING_ARRAY:
        case IDL_DT_OPEN_ARRAY:
            /* Alignment forced by array base type */
            defn_vec_ptr += 2;   /* DT_ARRAY and properties byte */
            IDL_DISCARD_LONG_FROM_VECTOR( defn_vec_ptr );
                                            /* Full array definition */
            IDL_GET_LONG_FROM_VECTOR( array_defn_index, defn_vec_ptr );
            array_defn_ptr = IDL_msp->IDL_type_vec + array_defn_index;
            dimensionality = (idl_ulong_int)*array_defn_ptr;
            if (type_byte == IDL_DT_FIXED_ARRAY)
                array_defn_ptr += dimensionality * sizeof(IDL_bound_pair_t);
            else if (type_byte == IDL_DT_VARYING_ARRAY)
            {
                array_defn_ptr += dimensionality * IDL_FIXED_BOUND_PAIR_WIDTH;
                array_defn_ptr += dimensionality * IDL_DATA_LIMIT_PAIR_WIDTH;
            }
            else /* type_byte == IDL_OPEN_VARYING_ARRAY */
            {
                IDL_ADV_DEFN_PTR_OVER_BOUNDS( array_defn_ptr, dimensionality );
                array_defn_ptr += dimensionality * IDL_DATA_LIMIT_PAIR_WIDTH;
            }
            return rpc_ss_ndr_bug_1_align(array_defn_ptr, IDL_msp);
        case IDL_DT_V1_ARRAY:
        case IDL_DT_V1_STRING:
            /* Discard modiier - do array alignment */
            defn_vec_ptr++;
            return rpc_ss_ndr_bug_1_align(defn_vec_ptr, IDL_msp);
        case IDL_DT_ENC_UNION:
            /* Weakest alignment forced by any union arm */
            defn_vec_ptr += 2;   /* DT_ENC_UNION and properties byte */
            IDL_GET_LONG_FROM_VECTOR( defn_index, defn_vec_ptr );
            union_defn_ptr = IDL_msp->IDL_type_vec + defn_index;
            IDL_GET_LONG_FROM_VECTOR( arm_count, union_defn_ptr );
            IDL_DISCARD_LONG_FROM_VECTOR( union_defn_ptr );
                                            /* Point at type of first arm */
            min_union_align = 8;    /* Maximum alignment required by NDR */
            for (i=0; i<arm_count+1; i++)
            {
                if (*union_defn_ptr != IDL_DT_VOID)
                {
                    arm_align = rpc_ss_ndr_bug_1_align(union_defn_ptr, IDL_msp);
                    if (arm_align < min_union_align)
                        min_union_align = arm_align;
                }
                union_defn_ptr += IDL_UNION_ARM_DESC_WIDTH;
            }
            return min_union_align;
        case IDL_DT_TRANSMIT_AS:
            /* Resolve down to non-[transmit_as] type */
            while (*defn_vec_ptr == IDL_DT_TRANSMIT_AS)
            {
                defn_vec_ptr += 2;   /* DT_TRANSMIT_AS and properties byte */
                IDL_GET_LONG_FROM_VECTOR( defn_index, defn_vec_ptr );
                defn_vec_ptr = IDL_msp->IDL_type_vec + defn_index;
            }
            return rpc_ss_ndr_bug_1_align(defn_vec_ptr, IDL_msp);
        default:
            /* Other flags cannot occur in a [v1_struct] */
#ifdef DEBUG_INTERP
            printf(
               "rpc_ss_ndr_bug_1_struct_align:unrecognized alignment type %d\n",
                        type_byte);
            exit(0);
#endif
            DCETHREAD_RAISE(rpc_x_coding_error);
    }

    /* Return alignment required for last field of structure */
    defn_vec_ptr += 2;     /* DT_FIXED_STRUCT and properties byte */
    IDL_GET_LONG_FROM_VECTOR(defn_index, defn_vec_ptr);
    struct_defn_ptr = IDL_msp->IDL_type_vec + defn_index;

    /* Find the last field of the structure */
    do {
        type_byte = *struct_defn_ptr;
        if (type_byte != IDL_DT_EOL)
            last_field_defn_ptr = struct_defn_ptr;
        struct_defn_ptr++;
        switch(type_byte)
        {
            case IDL_DT_BYTE:
            case IDL_DT_CHAR:
            case IDL_DT_BOOLEAN:
            case IDL_DT_DOUBLE:
            case IDL_DT_FLOAT:
            case IDL_DT_SMALL:
            case IDL_DT_SHORT:
            case IDL_DT_LONG:
            case IDL_DT_HYPER:
            case IDL_DT_USMALL:
            case IDL_DT_USHORT:
            case IDL_DT_ULONG:
            case IDL_DT_UHYPER:
            case IDL_DT_V1_ENUM:
            case IDL_DT_ERROR_STATUS:
                break;
            case IDL_DT_FIXED_ARRAY:
                struct_defn_ptr++;     /* Skip over properties byte */
                IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                                    /* Full array definition */
                IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                                /* Flattened array definition */
                break;
            case IDL_DT_VARYING_ARRAY:
                struct_defn_ptr++;     /* Skip over properties byte */
                IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                                    /* Full array definition */
                IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                                /* Flattened array definition */
                break;
            case IDL_DT_OPEN_ARRAY:
                struct_defn_ptr++;     /* Skip over properties byte */
                IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                                    /* Full array definition */
                IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                                /* Flattened array definition */
                break;
            case IDL_DT_ENC_UNION:
                struct_defn_ptr++;     /* Skip over properties byte */
                IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                                /* Union definition */
                break;
            case IDL_DT_TRANSMIT_AS:
            case IDL_DT_REPRESENT_AS:
                struct_defn_ptr++;     /* Skip over properties byte */
                IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                                /* [transmit_as] definition */
                break;
            case IDL_DT_V1_ARRAY:
                break;
            case IDL_DT_V1_STRING:
                struct_defn_ptr += 2;  /* DT_VARYING_ARRAY and properties */
                IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                                        /* Full array defn */
                IDL_DISCARD_LONG_FROM_VECTOR(struct_defn_ptr);
                                                      /* Flattened array defn */
                break;

            case IDL_DT_EOL:
                break;
            default:
                /* Other flags cannot occur in a [v1_struct] */
#ifdef DEBUG_INTERP
                printf(
                   "rpc_ss_ndr_bug_1_struct_align:unrecognized field type %d\n",
                        type_byte);
                exit(0);
#endif
                DCETHREAD_RAISE(rpc_x_coding_error);
        }
    } while (type_byte != IDL_DT_EOL);

    /* Do alignment for last field */
    return rpc_ss_ndr_bug_1_align(last_field_defn_ptr, IDL_msp);
}

/******************************************************************************/
/*                                                                            */
/*  Check type vector consistent with interpreter version                     */
/*                                                                            */
/******************************************************************************/
void rpc_ss_type_vec_vers_check
(
    IDL_msp_t IDL_msp
)
{
    idl_short_int interp_major_version, interp_minor_version;

    interp_major_version = IDL_VERSION_NUMBER(IDL_INTERP_ENCODE_MAJOR);
    interp_minor_version = IDL_VERSION_NUMBER(IDL_INTERP_ENCODE_MINOR);
    if ((interp_major_version != 3) || (interp_minor_version > 2))
    {
#ifdef DEBUG_INTERP
        printf("Expecting data structure version 3.0, 3.1 or 3.2 - found %d.%d\n",
                interp_major_version, interp_minor_version);
        exit(0);
#endif
        DCETHREAD_RAISE( rpc_x_unknown_stub_rtl_if_vers );
    }
}

static rpc_void_p_t
rpc_ss_default_alloc(idl_size_t size)
{
    return (rpc_void_p_t) malloc((size_t) size);
}

static void
rpc_ss_default_free(rpc_void_p_t obj)
{
    free ((void*) obj);
}

static void
rpc_ss_init_mem_handle(rpc_ss_mem_handle* handle)
{
    handle->memory = NULL;
    handle->node_table = NULL;

    handle->alloc = rpc_ss_default_alloc;
    handle->free = rpc_ss_default_free;
}

/******************************************************************************/
/*                                                                            */
/*  Initialize the marshalling state block                                    */
/*                                                                            */
/******************************************************************************/
void rpc_ss_init_marsh_state
(
    idl_byte IDL_type_vec[],
    IDL_msp_t IDL_msp
)
{
    rpc_ss_init_mem_handle(&IDL_msp->IDL_mem_handle);
    IDL_msp->IDL_status = error_status_ok;
    IDL_msp->IDL_elts_in_use = 0;
    IDL_msp->IDL_buff_addr = NULL;
    IDL_msp->IDL_left_in_buff = 0;
    IDL_msp->IDL_mp_start_offset = 0;
    IDL_msp->IDL_type_vec = IDL_type_vec;
    IDL_msp->IDL_pickling_handle = NULL;
    /* Protect against old stubs that haven't allocated a stack packet */
    IDL_msp->IDL_stack_packet_addr = NULL;
    IDL_msp->IDL_stack_packet_status = IDL_stack_packet_used_k;

    if (IDL_type_vec == NULL)
    {
        /* Pickling call, version check will be done later */
        return;
    }
    rpc_ss_type_vec_vers_check( IDL_msp );
}

/* always include these routines to read type vecs in either endian */

/******************************************************************************/
/*                                                                            */
/*  Build a bounds list from fixed bounds in the definition vector            */
/*                                                                            */
/******************************************************************************/
void rpc_ss_fixed_bounds_from_vector
(
    /* [in] */  idl_ulong_int dimensionality,
    /* [in] */  idl_byte *array_defn_ptr,   /* Points at array bounds */
    /* [out] */ IDL_bound_pair_t **p_bounds_list,
    IDL_msp_t IDL_msp
)
{
    IDL_bound_pair_t *bounds_list;
    unsigned32 i;

    bounds_list = (IDL_bound_pair_t *)rpc_ss_mem_alloc
        (&IDL_msp->IDL_mem_handle, (dimensionality * sizeof(IDL_bound_pair_t)));
    for (i=0; i<dimensionality; i++)
    {
        IDL_GET_LONG_FROM_VECTOR(bounds_list[i].lower,array_defn_ptr);
        IDL_GET_LONG_FROM_VECTOR(bounds_list[i].upper,array_defn_ptr);
    }
    *p_bounds_list = bounds_list;
}

/******************************************************************************/
/*                                                                            */
/*  Return the switch value for the specified union arm                       */
/*                                                                            */
/******************************************************************************/
idl_ulong_int rpc_ss_arm_switch_value
(
    /* [in] */  idl_byte *defn_vec_ptr,     /* Points at first union arm defn */
    /* [in] */ idl_long_int index,          /* Index of union arm desc */
    /* [in] */ IDL_msp_t IDL_msp            /* Needed for GET_LONG macro */
)
{
    idl_byte *switch_value_ptr;     /* Points to switch value in defn vec */
    idl_ulong_int switch_value;

    switch_value_ptr = defn_vec_ptr + index * IDL_UNION_ARM_DESC_WIDTH;
    IDL_GET_LONG_FROM_VECTOR(switch_value, switch_value_ptr);
    return(switch_value);
}

/******************************************************************************/
/*                                                                            */
/*  Write an unsigned value of specified integer type to an untyped location  */
/*                                                                            */
/******************************************************************************/
void rpc_ss_put_typed_integer
(
    /* in */ idl_ulong_int value,
    /* in */ idl_byte type,
    /* in */ rpc_void_p_t address
)
{
    switch (type)
    {
        case IDL_DT_SMALL:
            *(idl_small_int *)address = (idl_small_int)value;
            break;
        case IDL_DT_USMALL:
            *(idl_usmall_int *)address = (idl_usmall_int)value;
            break;
        case IDL_DT_SHORT:
            *(idl_short_int *)address = (idl_short_int)value;
            break;
        case IDL_DT_USHORT:
            *(idl_ushort_int *)address = (idl_ushort_int)value;
            break;
        case IDL_DT_LONG:
            *(idl_long_int *)address = (idl_long_int)value;
            break;
        case IDL_DT_ULONG:
            *(idl_ulong_int *)address = (idl_ulong_int)value;
            break;
        default:
            DCETHREAD_RAISE(rpc_x_coding_error);
    }
}