/cygdrive/c/src/openafs/openafs.git/repo/src/rx/xdr.h

/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 *
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 *
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 *
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 *
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 *
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */

/* This file has the contents of Sun's orginal types.h file added. */

/*      @(#)types.h 1.1 86/02/03 SMI      */

/*
 * Rpc additions to <sys/types.h>
 */

#ifndef __XDR_INCLUDE__
#define __XDR_INCLUDE__
#include <afs/param.h>
#ifdef AFS_NT40_ENV
#ifndef _MFC_VER
#include <winsock2.h>
#endif /* _MFC_VER */
#endif
#ifndef bool_t
#define bool_t  int
#define enum_t  int
#endif
#ifndef FALSE
#define FALSE   0
#endif /* !FALSE */
#ifndef TRUE
#define TRUE    1
#endif /* !TRUE */
#define __dontcare__    -1

#if defined(AFS_NBSD50_ENV)
# if !defined(DEF_CADDR_T)
typedef char * caddr_t;
#define DEF_CADDR_T
# endif
#endif

#ifndef mem_alloc
#define mem_alloc(bsize)        malloc(bsize)
#endif

#ifndef mem_free
#define mem_free(ptr, bsize)    free(ptr)
#endif

#if !defined(AFS_NT40_ENV)
#define xdr_alloc afs_xdr_alloc
#define xdr_free afs_xdr_free
#define xdr_void afs_xdr_void
#define xdr_int afs_xdr_int
#define xdr_u_int afs_xdr_u_int
#define xdr_short afs_xdr_short
#define xdr_u_short afs_xdr_u_short
#define xdr_long afs_xdr_long
#define xdr_u_long afs_xdr_u_long
#define xdr_char afs_xdr_char
#define xdr_u_char afs_xdr_u_char
#define xdr_bool afs_xdr_bool
#define xdr_enum afs_xdr_enum
#define xdr_array afs_xdr_array
#define xdr_arrayN afs_xdr_arrayN
#define xdr_bytes afs_xdr_bytes
#define xdr_opaque afs_xdr_opaque
#define xdr_string afs_xdr_string
#define xdr_union afs_xdr_union
#define xdr_float afs_xdr_float
#define xdr_double afs_xdr_double
#define xdr_reference afs_xdr_reference
#define xdr_wrapstring afs_xdr_wrapstring
#define xdr_vector afs_xdr_vector
#define xdr_int64 afs_xdr_int64
#define xdr_uint64 afs_xdr_uint64
#define xdr_pointer afs_xdr_pointer
#define xdrmem_create afs_xdrmem_create
#endif

#ifdef  KERNEL
#define osi_alloc               afs_osi_Alloc
#define osi_free                afs_osi_Free

/* keep here for now, 64 bit issues */
#ifndef AFS_OBSD44_ENV
extern void *afs_osi_Alloc(size_t x);
extern void afs_osi_Free(void *x, size_t asize);
#endif

#endif
#ifndef major                   /* ouch! */
#include <sys/types.h>
#endif

/*      @(#)xdr.h 1.1 86/02/03 SMI      */

/*
 * xdr.h, External Data Representation Serialization Routines.
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

/*
 * XDR provides a conventional way for converting between C data
 * types and an external bit-string representation.  Library supplied
 * routines provide for the conversion on built-in C data types.  These
 * routines and utility routines defined here are used to help implement
 * a type encode/decode routine for each user-defined type.
 *
 * Each data type provides a single procedure which takes two arguments:
 *
 *      bool_t
 *      xdrproc(xdrs, argresp)
 *              XDR *xdrs;
 *              <type> *argresp;
 *
 * xdrs is an instance of a XDR handle, to which or from which the data
 * type is to be converted.  argresp is a pointer to the structure to be
 * converted.  The XDR handle contains an operation field which indicates
 * which of the operations (ENCODE, DECODE * or FREE) is to be performed.
 *
 * XDR_DECODE may allocate space if the pointer argresp is null.  This
 * data can be freed with the XDR_FREE operation.
 *
 * We write only one procedure per data type to make it easy
 * to keep the encode and decode procedures for a data type consistent.
 * In many cases the same code performs all operations on a user defined type,
 * because all the hard work is done in the component type routines.
 * decode as a series of calls on the nested data types.
 */

/*
 * Xdr operations.  XDR_ENCODE causes the type to be encoded into the
 * stream.  XDR_DECODE causes the type to be extracted from the stream.
 * XDR_FREE can be used to release the space allocated by an XDR_DECODE
 * request.
 */
enum xdr_op {
    XDR_ENCODE = 0,
    XDR_DECODE = 1,
    XDR_FREE = 2
};

/*
 * This is the number of bytes per unit of external data.
 */
#define BYTES_PER_XDR_UNIT      (4)

/*
 * A xdrproc_t exists for each data type which is to be encoded or decoded.
 *
 * The second argument to the xdrproc_t is a pointer to an opaque pointer.
 * The opaque pointer generally points to a structure of the data type
 * to be decoded.  If this pointer is 0, then the type routines should
 * allocate dynamic storage of the appropriate size and return it.
 * bool_t       (*xdrproc_t)(XDR *, caddr_t *);
 */

/* We need a different prototype for i386 Linux kernel code, because it
 * uses a register (rather than stack) based calling convention. The
 * normal va_args prototype results in the arguments being placed on the
 * stack, where they aren't accessible to the 'real' function.
 */
#if defined(AFS_I386_LINUX26_ENV) && defined(KERNEL) && !defined(UKERNEL)
typedef bool_t(*xdrproc_t) (void *, caddr_t, u_int);
#else
typedef bool_t(*xdrproc_t) (void *, ...);
#endif

/*
 * The XDR handle.
 * Contains operation which is being applied to the stream,
 * an operations vector for the paticular implementation (e.g. see xdr_mem.c),
 * and two private fields for the use of the particular impelementation.
 */

typedef struct __afs_xdr {
    enum xdr_op x_op;           /* operation; fast additional param */
    struct xdr_ops {
        bool_t(*x_getint32) (struct __afs_xdr *xdrs, afs_int32 * lp);   /* get an afs_int32 from underlying stream */
        bool_t(*x_putint32) (struct __afs_xdr *xdrs, afs_int32 * lp);   /* put an afs_int32 to " */
        bool_t(*x_getbytes) (struct __afs_xdr *xdrs, caddr_t addr, u_int len);  /* get some bytes from " */
        bool_t(*x_putbytes) (struct __afs_xdr *xdrs, caddr_t addr, u_int len);  /* put some bytes to " */
        u_int(*x_getpostn) (struct __afs_xdr *xdrs);    /* returns bytes off from beginning */
        bool_t(*x_setpostn) (struct __afs_xdr *xdrs, u_int pos);        /* lets you reposition the stream */
        afs_int32 *(*x_inline) (struct __afs_xdr *xdrs, u_int len);     /* buf quick ptr to buffered data */
        void (*x_destroy) (struct __afs_xdr *xdrs);     /* free privates of this xdr_stream */
    } *x_ops;
    caddr_t x_public;           /* users' data */
    caddr_t x_private;          /* pointer to private data */
    caddr_t x_base;             /* private used for position info */
    int x_handy;                /* extra private word */
} XDR;

/*
 * Operations defined on a XDR handle
 *
 * XDR          *xdrs;
 * afs_int32            *int32p;
 * caddr_t       addr;
 * u_int         len;
 * u_int         pos;
 */
#define XDR_GETINT32(xdrs, int32p)                      \
        (*(xdrs)->x_ops->x_getint32)(xdrs, int32p)
#define xdr_getint32(xdrs, int32p)                      \
        (*(xdrs)->x_ops->x_getint32)(xdrs, int32p)

#define XDR_PUTINT32(xdrs, int32p)                      \
        (*(xdrs)->x_ops->x_putint32)(xdrs, int32p)
#define xdr_putint32(xdrs, int32p)                      \
        (*(xdrs)->x_ops->x_putint32)(xdrs, int32p)

#define XDR_GETBYTES(xdrs, addr, len)                   \
        (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
#define xdr_getbytes(xdrs, addr, len)                   \
        (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)

#define XDR_PUTBYTES(xdrs, addr, len)                   \
        (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
#define xdr_putbytes(xdrs, addr, len)                   \
        (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)

#define XDR_GETPOS(xdrs)                                \
        (*(xdrs)->x_ops->x_getpostn)(xdrs)
#define xdr_getpos(xdrs)                                \
        (*(xdrs)->x_ops->x_getpostn)(xdrs)

#define XDR_SETPOS(xdrs, pos)                           \
        (*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
#define xdr_setpos(xdrs, pos)                           \
        (*(xdrs)->x_ops->x_setpostn)(xdrs, pos)

#define XDR_INLINE(xdrs, len)                           \
        (*(xdrs)->x_ops->x_inline)(xdrs, len)
#define xdr_inline(xdrs, len)                           \
        (*(xdrs)->x_ops->x_inline)(xdrs, len)

#define XDR_DESTROY(xdrs)                               \
        if ((xdrs)->x_ops->x_destroy)                   \
                (*(xdrs)->x_ops->x_destroy)(xdrs)
#define xdr_destroy(xdrs)                               \
        if ((xdrs)->x_ops->x_destroy)                   \
                (*(xdrs)->x_ops->x_destroy)(xdrs)

/*
 * Support struct for discriminated unions.
 * You create an array of xdrdiscrim structures, terminated with
 * a entry with a null procedure pointer.  The xdr_union routine gets
 * the discriminant value and then searches the array of structures
 * for a matching value.  If a match is found the associated xdr routine
 * is called to handle that part of the union.  If there is
 * no match, then a default routine may be called.
 * If there is no match and no default routine it is an error.
 */
#define NULL_xdrproc_t ((xdrproc_t)0)
struct xdr_discrim {
    int value;
    xdrproc_t proc;
};

/*
 * In-line routines for fast encode/decode of primitve data types.
 * Caveat emptor: these use single memory cycles to get the
 * data from the underlying buffer, and will fail to operate
 * properly if the data is not aligned.  The standard way to use these
 * is to say:
 *      if ((buf = XDR_INLINE(xdrs, count)) == NULL)
 *              return (FALSE);
 *      <<< macro calls >>>
 * where ``count'' is the number of bytes of data occupied
 * by the primitive data types.
 *
 * N.B. and frozen for all time: each data type here uses 4 bytes
 * of external representation.
 */
#define IXDR_GET_INT32(buf)             ntohl(*buf++)
#define IXDR_PUT_INT32(buf, v)          (*buf++ = htonl(v))

#define IXDR_GET_BOOL(buf)              ((bool_t)IXDR_GET_INT32(buf))
#define IXDR_GET_ENUM(buf, t)           ((t)IXDR_GET_INT32(buf))
#define IXDR_GET_U_INT32(buf)           ((afs_uint32)IXDR_GET_INT32(buf))
#define IXDR_GET_SHORT(buf)             ((short)IXDR_GET_INT32(buf))
#define IXDR_GET_U_SHORT(buf)           ((u_short)IXDR_GET_INT32(buf))

#define IXDR_PUT_BOOL(buf, v)           IXDR_PUT_INT32((buf), ((afs_int32)(v)))
#define IXDR_PUT_ENUM(buf, v)           IXDR_PUT_INT32((buf), ((afs_int32)(v)))
#define IXDR_PUT_U_INT32(buf, v)        IXDR_PUT_INT32((buf), ((afs_int32)(v)))
#define IXDR_PUT_SHORT(buf, v)          IXDR_PUT_INT32((buf), ((afs_int32)(v)))
#define IXDR_PUT_U_SHORT(buf, v)        IXDR_PUT_INT32((buf), ((afs_int32)(v)))

#include "xdr_prototypes.h"
#endif /* __XDR_INCLUDE__ */