developer_cmds/rpcgen/rpc_clntout.c

   1 /*      $NetBSD: rpc_clntout.c,v 1.8 1997/10/18 10:53:37 lukem Exp $    */
   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 or with the express written consent of
   9  * Sun Microsystems, Inc.
  10  *
  11  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  12  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  13  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  14  *
  15  * Sun RPC is provided with no support and without any obligation on the
  16  * part of Sun Microsystems, Inc. to assist in its use, correction,
  17  * modification or enhancement.
  18  *
  19  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  20  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  21  * OR ANY PART THEREOF.
  22  *
  23  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  24  * or profits or other special, indirect and consequential damages, even if
  25  * Sun has been advised of the possibility of such damages.
  26  *
  27  * Sun Microsystems, Inc.
  28  * 2550 Garcia Avenue
  29  * Mountain View, California  94043
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)rpc_clntout.c 1.11 89/02/22 (C) 1987 SMI";
  36 #else
  37 __RCSID("$NetBSD: rpc_clntout.c,v 1.8 1997/10/18 10:53:37 lukem Exp $");
  38 #endif
  39 #endif
  40
  41 /*
  42  * rpc_clntout.c, Client-stub outputter for the RPC protocol compiler
  43  * Copyright (C) 1987, Sun Microsytsems, Inc.
  44  */
  45 #include <stdio.h>
  46 #include <string.h>
  47 #include <rpc/types.h>
  48 #include "rpc_scan.h"
  49 #include "rpc_parse.h"
  50 #include "rpc_util.h"
  51
  52 static void write_program __P((definition *));
  53 static char *ampr __P((char *));
  54 static void printbody __P((proc_list *));
  55
  56 #define DEFAULT_TIMEOUT 25      /* in seconds */
  57 static char RESULT[] = "clnt_res";
  58
  59
  60 void
  61 write_stubs()
  62 {
  63         list   *l;
  64         definition *def;
  65
  66         f_print(fout,
  67             "\n/* Default timeout can be changed using clnt_control() */\n");
  68         f_print(fout, "static struct timeval TIMEOUT = { %d, 0 };\n",
  69             DEFAULT_TIMEOUT);
  70         for (l = defined; l != NULL; l = l->next) {
  71                 def = (definition *) l->val;
  72                 if (def->def_kind == DEF_PROGRAM) {
  73                         write_program(def);
  74                 }
  75         }
  76 }
  77
  78 static void
  79 write_program(def)
  80         definition *def;
  81 {
  82         version_list *vp;
  83         proc_list *proc;
  84
  85         for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
  86                 for (proc = vp->procs; proc != NULL; proc = proc->next) {
  87                         f_print(fout, "\n");
  88                         ptype(proc->res_prefix, proc->res_type, 1);
  89                         f_print(fout, "*\n");
  90                         pvname(proc->proc_name, vp->vers_num);
  91                         printarglist(proc, "clnt", "CLIENT *");
  92                         f_print(fout, "{\n");
  93                         printbody(proc);
  94                         f_print(fout, "}\n");
  95                 }
  96         }
  97 }
  98 /* Writes out declarations of procedure's argument list.
  99    In either ANSI C style, in one of old rpcgen style (pass by reference),
 100    or new rpcgen style (multiple arguments, pass by value);
 101    */
 102
 103 /* sample addargname = "clnt"; sample addargtype = "CLIENT * " */
 104
 105 void
 106 printarglist(proc, addargname, addargtype)
 107         proc_list *proc;
 108         char   *addargname, *addargtype;
 109 {
 110
 111         decl_list *l;
 112
 113         if (!newstyle) {        /* old style: always pass argument by
 114                                  * reference */
 115                 if (Cflag) {    /* C++ style heading */
 116                         f_print(fout, "(");
 117                         ptype(proc->args.decls->decl.prefix, proc->args.decls->decl.type, 1);
 118                         f_print(fout, "*argp, %s%s)\n", addargtype, addargname);
 119                 } else {
 120                         f_print(fout, "(argp, %s)\n", addargname);
 121                         f_print(fout, "\t");
 122                         ptype(proc->args.decls->decl.prefix, proc->args.decls->decl.type, 1);
 123                         f_print(fout, "*argp;\n");
 124                 }
 125         } else
 126                 if (streq(proc->args.decls->decl.type, "void")) {
 127                         /* newstyle, 0 argument */
 128                         if (Cflag)
 129                                 f_print(fout, "(%s%s)\n", addargtype, addargname);
 130                         else
 131                                 f_print(fout, "(%s)\n", addargname);
 132                 } else {
 133                         /* new style, 1 or multiple arguments */
 134                         if (!Cflag) {
 135                                 f_print(fout, "(");
 136                                 for (l = proc->args.decls; l != NULL; l = l->next)
 137                                         f_print(fout, "%s, ", l->decl.name);
 138                                 f_print(fout, "%s)\n", addargname);
 139                                 for (l = proc->args.decls; l != NULL; l = l->next) {
 140                                         pdeclaration(proc->args.argname, &l->decl, 1, ";\n");
 141                                 }
 142                         } else {/* C++ style header */
 143                                 f_print(fout, "(");
 144                                 for (l = proc->args.decls; l != NULL; l = l->next) {
 145                                         pdeclaration(proc->args.argname, &l->decl, 0, ", ");
 146                                 }
 147                                 f_print(fout, " %s%s)\n", addargtype, addargname);
 148                         }
 149                 }
 150
 151         if (!Cflag)
 152                 f_print(fout, "\t%s%s;\n", addargtype, addargname);
 153 }
 154
 155
 156
 157 static char *
 158 ampr(type)
 159         char   *type;
 160 {
 161         if (isvectordef(type, REL_ALIAS)) {
 162                 return ("");
 163         } else {
 164                 return ("&");
 165         }
 166 }
 167
 168 static void
 169 printbody(proc)
 170         proc_list *proc;
 171 {
 172         decl_list *l;
 173         bool_t  args2 = (proc->arg_num > 1);
 174
 175         /* For new style with multiple arguments, need a structure in which to
 176          * stuff the arguments. */
 177         if (newstyle && args2) {
 178                 f_print(fout, "\t%s", proc->args.argname);
 179                 f_print(fout, " arg;\n");
 180         }
 181         f_print(fout, "\tstatic ");
 182         if (streq(proc->res_type, "void")) {
 183                 f_print(fout, "char ");
 184         } else {
 185                 ptype(proc->res_prefix, proc->res_type, 0);
 186         }
 187         f_print(fout, "%s;\n", RESULT);
 188         f_print(fout, "\n");
 189         f_print(fout, "\tmemset((char *)%s%s, 0, sizeof(%s));\n",
 190             ampr(proc->res_type), RESULT, RESULT);
 191         if (newstyle && !args2 && (streq(proc->args.decls->decl.type, "void"))) {
 192                 /* newstyle, 0 arguments */
 193                 f_print(fout,
 194                     "\tif (clnt_call(clnt, %s, xdr_void", proc->proc_name);
 195                 f_print(fout,
 196                     ", NULL, xdr_%s, %s%s, TIMEOUT) != RPC_SUCCESS) {\n",
 197                     stringfix(proc->res_type), ampr(proc->res_type), RESULT);
 198
 199         } else
 200                 if (newstyle && args2) {
 201                         /* newstyle, multiple arguments:  stuff arguments into
 202                          * structure */
 203                         for (l = proc->args.decls; l != NULL; l = l->next) {
 204                                 f_print(fout, "\targ.%s = %s;\n",
 205                                     l->decl.name, l->decl.name);
 206                         }
 207                         f_print(fout,
 208                             "\tif (clnt_call(clnt, %s, xdr_%s, &arg, xdr_%s, %s%s, TIMEOUT) != RPC_SUCCESS)\n",
 209                             proc->proc_name,
 210                             proc->args.argname,
 211                             stringfix(proc->res_type),
 212                             ampr(proc->res_type), RESULT);
 213                 } else {        /* single argument, new or old style */
 214                         f_print(fout,
 215                             "\tif (clnt_call(clnt, %s, xdr_%s, %s%s, xdr_%s, %s%s, TIMEOUT) != RPC_SUCCESS)\n",
 216                             proc->proc_name,
 217                             stringfix(proc->args.decls->decl.type),
 218                             (newstyle ? "&" : ""),
 219                             (newstyle ? proc->args.decls->decl.name : "argp"),
 220                             stringfix(proc->res_type),
 221                             ampr(proc->res_type), RESULT);
 222                 }
 223         f_print(fout, "\t\treturn (NULL);\n");
 224         if (streq(proc->res_type, "void")) {
 225                 f_print(fout, "\treturn ((void *)%s%s);\n",
 226                     ampr(proc->res_type), RESULT);
 227         } else {
 228                 f_print(fout, "\treturn (%s%s);\n", ampr(proc->res_type), RESULT);
 229         }
 230 }