xdr_array.c 4.6 KB

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  1. /* @(#)xdr_array.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_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
  32. #endif
  33. /*
  34. * xdr_array.c, Generic XDR routines implementation.
  35. *
  36. * Copyright (C) 1984, Sun Microsystems, Inc.
  37. *
  38. * These are the "non-trivial" xdr primitives used to serialize and de-serialize
  39. * arrays. 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. #include <limits.h>
  49. #ifdef USE_IN_LIBIO
  50. # include <wchar.h>
  51. #endif
  52. #define LASTUNSIGNED ((u_int)0-1)
  53. /*
  54. * XDR an array of arbitrary elements
  55. * *addrp is a pointer to the array, *sizep is the number of elements.
  56. * If addrp is NULL (*sizep * elsize) bytes are allocated.
  57. * elsize is the size (in bytes) of each element, and elproc is the
  58. * xdr procedure to call to handle each element of the array.
  59. */
  60. bool_t
  61. xdr_array (xdrs, addrp, sizep, maxsize, elsize, elproc)
  62. XDR *xdrs;
  63. caddr_t *addrp; /* array pointer */
  64. u_int *sizep; /* number of elements */
  65. u_int maxsize; /* max numberof elements */
  66. u_int elsize; /* size in bytes of each element */
  67. xdrproc_t elproc; /* xdr routine to handle each element */
  68. {
  69. u_int i;
  70. caddr_t target = *addrp;
  71. u_int c; /* the actual element count */
  72. bool_t stat = TRUE;
  73. u_int nodesize;
  74. /* like strings, arrays are really counted arrays */
  75. if (!xdr_u_int (xdrs, sizep))
  76. {
  77. return FALSE;
  78. }
  79. c = *sizep;
  80. /*
  81. * XXX: Let the overflow possibly happen with XDR_FREE because mem_free()
  82. * doesn't actually use its second argument anyway.
  83. */
  84. if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE))
  85. {
  86. return FALSE;
  87. }
  88. nodesize = c * elsize;
  89. /*
  90. * if we are deserializing, we may need to allocate an array.
  91. * We also save time by checking for a null array if we are freeing.
  92. */
  93. if (target == NULL)
  94. switch (xdrs->x_op)
  95. {
  96. case XDR_DECODE:
  97. if (c == 0)
  98. return TRUE;
  99. *addrp = target = mem_alloc (nodesize);
  100. if (target == NULL)
  101. {
  102. #ifdef USE_IN_LIBIO
  103. if (_IO_fwide (stderr, 0) > 0)
  104. (void) __fwprintf (stderr, L"%s",
  105. _("xdr_array: out of memory\n"));
  106. else
  107. #endif
  108. (void) fputs (_("xdr_array: out of memory\n"), stderr);
  109. return FALSE;
  110. }
  111. bzero (target, nodesize);
  112. break;
  113. case XDR_FREE:
  114. return TRUE;
  115. default:
  116. break;
  117. }
  118. /*
  119. * now we xdr each element of array
  120. */
  121. for (i = 0; (i < c) && stat; i++)
  122. {
  123. stat = (*elproc) (xdrs, target, LASTUNSIGNED);
  124. target += elsize;
  125. }
  126. /*
  127. * the array may need freeing
  128. */
  129. if (xdrs->x_op == XDR_FREE)
  130. {
  131. mem_free (*addrp, nodesize);
  132. *addrp = NULL;
  133. }
  134. return stat;
  135. }
  136. /*
  137. * xdr_vector():
  138. *
  139. * XDR a fixed length array. Unlike variable-length arrays,
  140. * the storage of fixed length arrays is static and unfreeable.
  141. * > basep: base of the array
  142. * > size: size of the array
  143. * > elemsize: size of each element
  144. * > xdr_elem: routine to XDR each element
  145. */
  146. bool_t
  147. xdr_vector (xdrs, basep, nelem, elemsize, xdr_elem)
  148. XDR *xdrs;
  149. char *basep;
  150. u_int nelem;
  151. u_int elemsize;
  152. xdrproc_t xdr_elem;
  153. {
  154. u_int i;
  155. char *elptr;
  156. elptr = basep;
  157. for (i = 0; i < nelem; i++)
  158. {
  159. if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED))
  160. {
  161. return FALSE;
  162. }
  163. elptr += elemsize;
  164. }
  165. return TRUE;
  166. }