include/gmx_system_xdr.h

   1 /*
   2  *
   3  *                This source code is part of
   4  *
   5  *                 G   R   O   M   A   C   S
   6  *
   7  *          GROningen MAchine for Chemical Simulations
   8  *
   9  *                        VERSION 3.2.0
  10  * Written by David van der Spoel, Erik Lindahl, Berk Hess, and others.
  11  * Copyright (c) 1991-2000, University of Groningen, The Netherlands.
  12  * Copyright (c) 2001-2004, The GROMACS development team,
  13  * check out http://www.gromacs.org for more information.
  14
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * If you want to redistribute modifications, please consider that
  21  * scientific software is very special. Version control is crucial -
  22  * bugs must be traceable. We will be happy to consider code for
  23  * inclusion in the official distribution, but derived work must not
  24  * be called official GROMACS. Details are found in the README & COPYING
  25  * files - if they are missing, get the official version at www.gromacs.org.
  26  *
  27  * To help us fund GROMACS development, we humbly ask that you cite
  28  * the papers on the package - you can find them in the top README file.
  29  *
  30  * For more info, check our website at http://www.gromacs.org
  31  *
  32  * And Hey:
  33  * Gromacs Runs On Most of All Computer Systems
  34  */
  35
  36 #ifndef _gmx_system_xdr_h
  37 #define _gmx_system_xdr_h
  38
  39 #include <limits.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42
  43
  44 /*
  45  * This header file is ONLY used on windows systems, since these do
  46  * not include the XDR routines present on a unix machine. It will
  47  * most probably work on other platforms too, but make sure you
  48  * test that the xtc files produced are ok before using it.
  49  *
  50  * This header file contains Gromacs versions of the definitions for
  51  * Sun External Data Representation (XDR) headers and routines.
  52  *
  53  * On most UNIX systems this is already present as part of your
  54  * system libraries, but since we want to make Gromacs portable to
  55  * platforms like Microsoft Windows we have created a private version
  56  * of the necessary routines and distribute them with the Gromacs source.
  57  *
  58  * Although the rest of Gromacs is GPL, you can copy and use the XDR
  59  * routines in any way you want as long as you obey Sun's license:
  60  *
  61  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  62  * unrestricted use provided that this legend is included on all tape
  63  * media and as a part of the software program in whole or part.  Users
  64  * may copy or modify Sun RPC without charge, but are not authorized
  65  * to license or distribute it to anyone else except as part of a product or
  66  * program developed by the user.
  67  *
  68  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  69  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  70  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  71  *
  72  * Sun RPC is provided with no support and without any obligation on the
  73  * part of Sun Microsystems, Inc. to assist in its use, correction,
  74  * modification or enhancement.
  75  *
  76  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  77  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  78  * OR ANY PART THEREOF.
  79  *
  80  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  81  * or profits or other special, indirect and consequential damages, even if
  82  * Sun has been advised of the possibility of such damages.
  83  *
  84  * Sun Microsystems, Inc.
  85  * 2550 Garcia Avenue
  86  * Mountain View, California  94043
  87  */
  88
  89 /*
  90  * Xdr operations.  XDR_ENCODE causes the type to be encoded into the
  91  * stream.  XDR_DECODE causes the type to be extracted from the stream.
  92  * XDR_FREE can be used to release the space allocated by an
  93  * XDR_DECODE request.
  94  */
  95
  96 /* We already have a boolean type in Gromacs, but the XDR library
  97  * one has a slightly different name (the calls should be identical).
  98  */
  99 typedef int bool_t;
 100
 101 /*
 102  * Aninteger type that is 32 bits wide. Check if int,
 103  * long or short is 32 bits and die if none of them is :-)
 104  */
 105 #if (INT_MAX == 2147483647)
 106    typedef int xdr_int32_t;
 107    typedef unsigned int xdr_uint32_t;
 108 #elif (LONG_MAX == 2147483647L)
 109    typedef long xdr_int32_t;
 110    typedef unsigned long xdr_uint32_t;
 111 #elif (SHRT_MAX == 2147483647)
 112    typedef short xdr_int32_t;
 113    typedef unsigned short xdr_uint32_t;
 114 #else
 115 #  error ERROR: No 32 bit wide integer type found!
 116 #endif
 117
 118 enum xdr_op {
 119   XDR_ENCODE = 0,
 120   XDR_DECODE = 1,
 121   XDR_FREE = 2
 122 };
 123
 124 #ifndef FALSE
 125 #      define  FALSE   (0)
 126 #endif
 127 #ifndef TRUE
 128 #      define  TRUE    (1)
 129 #endif
 130
 131
 132 #define BYTES_PER_XDR_UNIT      (4)
 133 /* Macro to round up to units of 4. */
 134 #define XDR_RNDUP(x)  (((x) + BYTES_PER_XDR_UNIT - 1) & ~(BYTES_PER_XDR_UNIT - 1))
 135
 136
 137 /*
 138  * The XDR handle.
 139  * Contains operation which is being applied to the stream,
 140  * an operations vector for the particular implementation (e.g. see xdr_mem.c),
 141  * and two private fields for the use of the particular implementation.
 142  */
 143 typedef struct XDR XDR;
 144 struct XDR
 145   {
 146     enum xdr_op x_op;           /* operation; fast additional param */
 147     struct xdr_ops
 148       {
 149         bool_t (*x_getbytes) (XDR *__xdrs, char *__addr, unsigned int __len);
 150         /* get some bytes from " */
 151         bool_t (*x_putbytes) (XDR *__xdrs, char *__addr, unsigned int __len);
 152         /* put some bytes to " */
 153         unsigned int (*x_getpostn) (XDR *__xdrs);
 154         /* returns bytes off from beginning */
 155         bool_t (*x_setpostn) (XDR *__xdrs, unsigned int __pos);
 156         /* lets you reposition the stream */
 157         xdr_int32_t *(*x_inline) (XDR *__xdrs, int __len);
 158         /* buf quick ptr to buffered data */
 159         void (*x_destroy) (XDR *__xdrs);
 160         /* free privates of this xdr_stream */
 161         bool_t (*x_getint32) (XDR *__xdrs, xdr_int32_t *__ip);
 162         /* get a int from underlying stream */
 163         bool_t (*x_putint32) (XDR *__xdrs, xdr_int32_t *__ip);
 164         /* put a int to " */
 165         bool_t (*x_getuint32) (XDR *__xdrs, xdr_uint32_t *__ip);
 166         /* get a unsigned int from underlying stream */
 167         bool_t (*x_putuint32) (XDR *__xdrs, xdr_uint32_t *__ip);
 168         /* put a int to " */
 169       }
 170      *x_ops;
 171     char *x_public;             /* users' data */
 172     char *x_private;            /* pointer to private data */
 173     char *x_base;               /* private used for position info */
 174     int x_handy;                /* extra private word */
 175   };
 176
 177 /*
 178  * A xdrproc_t exists for each data type which is to be encoded or decoded.
 179  *
 180  * The second argument to the xdrproc_t is a pointer to an opaque pointer.
 181  * The opaque pointer generally points to a structure of the data type
 182  * to be decoded.  If this pointer is 0, then the type routines should
 183  * allocate dynamic storage of the appropriate size and return it.
 184  */
 185
 186 typedef bool_t (*xdrproc_t) (XDR *, void *,...);
 187
 188 /*
 189  * Operations defined on a XDR handle
 190  *
 191  * XDR          *xdrs;
 192  * xdr_int32_t  *int32p;
 193  * long         *longp;
 194  * char         *addr;
 195  * unsigned int  len;
 196  * unsigned int  pos;
 197  */
 198
 199
 200 #define xdr_getint32(xdrs, int32p)                      \
 201         (*(xdrs)->x_ops->x_getint32)(xdrs, int32p)
 202
 203 #define xdr_putint32(xdrs, int32p)                      \
 204         (*(xdrs)->x_ops->x_putint32)(xdrs, int32p)
 205
 206 #define xdr_getuint32(xdrs, uint32p)                      \
 207         (*(xdrs)->x_ops->x_getuint32)(xdrs, uint32p)
 208
 209 #define xdr_putuint32(xdrs, uint32p)                      \
 210         (*(xdrs)->x_ops->x_putuint32)(xdrs, uint32p)
 211
 212 #define xdr_getbytes(xdrs, addr, len)                   \
 213         (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
 214
 215 #define xdr_putbytes(xdrs, addr, len)                   \
 216         (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
 217
 218 #define xdr_getpos(xdrs)                                \
 219         (*(xdrs)->x_ops->x_getpostn)(xdrs)
 220
 221 #define xdr_setpos(xdrs, pos)                           \
 222         (*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
 223
 224 #define xdr_inline(xdrs, len)                           \
 225         (*(xdrs)->x_ops->x_inline)(xdrs, len)
 226
 227 #define xdr_destroy(xdrs)                                       \
 228         do {                                                    \
 229                 if ((xdrs)->x_ops->x_destroy)                   \
 230                         (*(xdrs)->x_ops->x_destroy)(xdrs);      \
 231         } while (0)
 232
 233
 234 extern bool_t xdr_int (XDR *__xdrs, int *__ip);
 235 extern bool_t xdr_u_int (XDR *__xdrs, unsigned int *__ip);
 236 extern bool_t xdr_short (XDR *__xdrs, short *__ip);
 237 extern bool_t xdr_u_short (XDR *__xdrs, unsigned short *__ip);
 238 extern bool_t xdr_bool (XDR *__xdrs, int *__bp);
 239 extern bool_t xdr_opaque (XDR *__xdrs, char *__cp, unsigned int __cnt);
 240 extern bool_t xdr_string (XDR *__xdrs, char **__cpp, unsigned int __maxsize);
 241 extern bool_t xdr_char (XDR *__xdrs, char *__cp);
 242 extern bool_t xdr_u_char (XDR *__xdrs, unsigned char *__cp);
 243 extern bool_t xdr_vector (XDR *__xdrs, char *__basep, unsigned int __nelem,
 244                           unsigned int __elemsize, xdrproc_t __xdr_elem);
 245 extern bool_t xdr_float (XDR *__xdrs, float *__fp);
 246 extern bool_t xdr_double (XDR *__xdrs, double *__dp);
 247 extern void xdrstdio_create (XDR *__xdrs, FILE *__file, enum xdr_op __xop);
 248
 249 /* free memory buffers for xdr */
 250 extern void xdr_free (xdrproc_t __proc, char *__objp);
 251
 252
 253 #endif /* _gmx_system_xdr_h */
 254