xdr_reference.c 4.0 KB

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  1. /* @(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC */
  2. /*
  3. * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  4. * unrestricted use provided that this legend is included on all tape
  5. * media and as a part of the software program in whole or part. Users
  6. * may copy or modify Sun RPC without charge, but are not authorized
  7. * to license or distribute it to anyone else except as part of a product or
  8. * program developed by the user.
  9. *
  10. * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  11. * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  12. * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  13. *
  14. * Sun RPC is provided with no support and without any obligation on the
  15. * part of Sun Microsystems, Inc. to assist in its use, correction,
  16. * modification or enhancement.
  17. *
  18. * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  19. * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  20. * OR ANY PART THEREOF.
  21. *
  22. * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  23. * or profits or other special, indirect and consequential damages, even if
  24. * Sun has been advised of the possibility of such damages.
  25. *
  26. * Sun Microsystems, Inc.
  27. * 2550 Garcia Avenue
  28. * Mountain View, California 94043
  29. */
  30. #if 0
  31. static char sccsid[] = "@(#)xdr_reference.c 1.11 87/08/11 SMI";
  32. #endif
  33. /*
  34. * xdr_reference.c, Generic XDR routines implementation.
  35. *
  36. * Copyright (C) 1987, Sun Microsystems, Inc.
  37. *
  38. * These are the "non-trivial" xdr primitives used to serialize and de-serialize
  39. * "pointers". See xdr.h for more info on the interface to xdr.
  40. */
  41. #define __FORCE_GLIBC
  42. #define _GNU_SOURCE
  43. #include <features.h>
  44. #include <stdio.h>
  45. #include <string.h>
  46. #include <rpc/types.h>
  47. #include <rpc/xdr.h>
  48. #ifdef USE_IN_LIBIO
  49. # include <wchar.h>
  50. # include <libio/iolibio.h>
  51. # define fputs(s, f) _IO_fputs (s, f)
  52. #endif
  53. #define LASTUNSIGNED ((u_int)0-1)
  54. /*
  55. * XDR an indirect pointer
  56. * xdr_reference is for recursively translating a structure that is
  57. * referenced by a pointer inside the structure that is currently being
  58. * translated. pp references a pointer to storage. If *pp is null
  59. * the necessary storage is allocated.
  60. * size is the size of the referneced structure.
  61. * proc is the routine to handle the referenced structure.
  62. */
  63. bool_t
  64. xdr_reference (xdrs, pp, size, proc)
  65. XDR *xdrs;
  66. caddr_t *pp; /* the pointer to work on */
  67. u_int size; /* size of the object pointed to */
  68. xdrproc_t proc; /* xdr routine to handle the object */
  69. {
  70. caddr_t loc = *pp;
  71. bool_t stat;
  72. if (loc == NULL)
  73. switch (xdrs->x_op)
  74. {
  75. case XDR_FREE:
  76. return TRUE;
  77. case XDR_DECODE:
  78. *pp = loc = (caddr_t) mem_alloc (size);
  79. if (loc == NULL)
  80. {
  81. #ifdef USE_IN_LIBIO
  82. if (_IO_fwide (stderr, 0) > 0)
  83. (void) __fwprintf (stderr, L"%s",
  84. _("xdr_reference: out of memory\n"));
  85. else
  86. #endif
  87. (void) fputs (_("xdr_reference: out of memory\n"), stderr);
  88. return FALSE;
  89. }
  90. memset (loc, 0, (int) size);
  91. break;
  92. default:
  93. break;
  94. }
  95. stat = (*proc) (xdrs, loc, LASTUNSIGNED);
  96. if (xdrs->x_op == XDR_FREE)
  97. {
  98. mem_free (loc, size);
  99. *pp = NULL;
  100. }
  101. return stat;
  102. }
  103. /*
  104. * xdr_pointer():
  105. *
  106. * XDR a pointer to a possibly recursive data structure. This
  107. * differs with xdr_reference in that it can serialize/deserialize
  108. * trees correctly.
  109. *
  110. * What's sent is actually a union:
  111. *
  112. * union object_pointer switch (boolean b) {
  113. * case TRUE: object_data data;
  114. * case FALSE: void nothing;
  115. * }
  116. *
  117. * > objpp: Pointer to the pointer to the object.
  118. * > obj_size: size of the object.
  119. * > xdr_obj: routine to XDR an object.
  120. *
  121. */
  122. bool_t
  123. xdr_pointer (xdrs, objpp, obj_size, xdr_obj)
  124. XDR *xdrs;
  125. char **objpp;
  126. u_int obj_size;
  127. xdrproc_t xdr_obj;
  128. {
  129. bool_t more_data;
  130. more_data = (*objpp != NULL);
  131. if (!xdr_bool (xdrs, &more_data))
  132. {
  133. return FALSE;
  134. }
  135. if (!more_data)
  136. {
  137. *objpp = NULL;
  138. return TRUE;
  139. }
  140. return xdr_reference (xdrs, objpp, obj_size, xdr_obj);
  141. }