xdr_reference.c 3.9 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. #include <features.h>
  43. #include <stdio.h>
  44. #include <string.h>
  45. #include <rpc/types.h>
  46. #include <rpc/xdr.h>
  47. #ifdef USE_IN_LIBIO
  48. # include <wchar.h>
  49. # include <libio/iolibio.h>
  50. # define fputs(s, f) _IO_fputs (s, f)
  51. #endif
  52. #define LASTUNSIGNED ((u_int)0-1)
  53. /*
  54. * XDR an indirect pointer
  55. * xdr_reference is for recursively translating a structure that is
  56. * referenced by a pointer inside the structure that is currently being
  57. * translated. pp references a pointer to storage. If *pp is null
  58. * the necessary storage is allocated.
  59. * size is the size of the referneced structure.
  60. * proc is the routine to handle the referenced structure.
  61. */
  62. bool_t
  63. xdr_reference (XDR *xdrs, caddr_t *pp, u_int size, xdrproc_t proc)
  64. {
  65. caddr_t loc = *pp;
  66. bool_t stat;
  67. if (loc == NULL)
  68. switch (xdrs->x_op)
  69. {
  70. case XDR_FREE:
  71. return TRUE;
  72. case XDR_DECODE:
  73. *pp = loc = (caddr_t) mem_alloc (size);
  74. if (loc == NULL)
  75. {
  76. #ifdef USE_IN_LIBIO
  77. if (_IO_fwide (stderr, 0) > 0)
  78. (void) fwprintf (stderr, L"%s",
  79. _("xdr_reference: out of memory\n"));
  80. else
  81. #endif
  82. (void) fputs (_("xdr_reference: out of memory\n"), stderr);
  83. return FALSE;
  84. }
  85. memset (loc, 0, (int) size);
  86. break;
  87. default:
  88. break;
  89. }
  90. stat = (*proc) (xdrs, loc, LASTUNSIGNED);
  91. if (xdrs->x_op == XDR_FREE)
  92. {
  93. mem_free (loc, size);
  94. *pp = NULL;
  95. }
  96. return stat;
  97. }
  98. libc_hidden_def(xdr_reference)
  99. /*
  100. * xdr_pointer():
  101. *
  102. * XDR a pointer to a possibly recursive data structure. This
  103. * differs with xdr_reference in that it can serialize/deserialize
  104. * trees correctly.
  105. *
  106. * What's sent is actually a union:
  107. *
  108. * union object_pointer switch (boolean b) {
  109. * case TRUE: object_data data;
  110. * case FALSE: void nothing;
  111. * }
  112. *
  113. * > objpp: Pointer to the pointer to the object.
  114. * > obj_size: size of the object.
  115. * > xdr_obj: routine to XDR an object.
  116. *
  117. */
  118. bool_t
  119. xdr_pointer (xdrs, objpp, obj_size, xdr_obj)
  120. XDR *xdrs;
  121. char **objpp;
  122. u_int obj_size;
  123. xdrproc_t xdr_obj;
  124. {
  125. bool_t more_data;
  126. more_data = (*objpp != NULL);
  127. if (!xdr_bool (xdrs, &more_data))
  128. {
  129. return FALSE;
  130. }
  131. if (!more_data)
  132. {
  133. *objpp = NULL;
  134. return TRUE;
  135. }
  136. return xdr_reference (xdrs, objpp, obj_size, xdr_obj);
  137. }