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1 /*
2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3  * unrestricted use provided that this legend is included on all tape
4  * media and as a part of the software program in whole or part.  Users
5  * may copy or modify Sun RPC without charge, but are not authorized
6  * to license or distribute it to anyone else except as part of a product or
7  * program developed by the user.
8  *
9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12  *
13  * Sun RPC is provided with no support and without any obligation on the
14  * part of Sun Microsystems, Inc. to assist in its use, correction,
15  * modification or enhancement.
16  *
17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19  * OR ANY PART THEREOF.
20  *
21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22  * or profits or other special, indirect and consequential damages, even if
23  * Sun has been advised of the possibility of such damages.
24  *
25  * Sun Microsystems, Inc.
26  * 2550 Garcia Avenue
27  * Mountain View, California  94043
28  */
29
30 #if 0
31 #ifndef lint
32 #ident  "@(#)rpc_clntout.c      1.15    94/04/25 SMI"
33 static char sccsid[] = "@(#)rpc_clntout.c 1.11 89/02/22 (C) 1987 SMI";
34 #endif
35 #endif
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39
40 /*
41  * rpc_clntout.c, Client-stub outputter for the RPC protocol compiler
42  * Copyright (C) 1987, Sun Microsytsems, Inc.
43  */
44 #include <stdio.h>
45 #include <string.h>
46 #include <rpc/types.h>
47 #include "rpc_parse.h"
48 #include "rpc_scan.h"
49 #include "rpc_util.h"
50
51 static void write_program( definition * );
52 static void printbody( proc_list * );
53
54 static char RESULT[] = "clnt_res";
55
56
57 #define DEFAULT_TIMEOUT 25      /* in seconds */
58
59
60 void
61 write_stubs(void)
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(definition *def)
80 {
81         version_list *vp;
82         proc_list *proc;
83
84         for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
85                 for (proc = vp->procs; proc != NULL; proc = proc->next) {
86                         f_print(fout, "\n");
87                         if (mtflag == 0) {
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, RESULT, "clnt", "CLIENT *");
92                         } else {
93                                 f_print(fout, "enum clnt_stat \n");
94                                 pvname(proc->proc_name, vp->vers_num);
95                                 printarglist(proc, RESULT,  "clnt", "CLIENT *");
96
97                         }
98                         f_print(fout, "{\n");
99                         printbody(proc);
100
101                         f_print(fout, "}\n");
102                 }
103         }
104 }
105
106 /*
107  * Writes out declarations of procedure's argument list.
108  * In either ANSI C style, in one of old rpcgen style (pass by reference),
109  * or new rpcgen style (multiple arguments, pass by value);
110  */
111
112 /* sample addargname = "clnt"; sample addargtype = "CLIENT * " */
113
114 void
115 printarglist(proc_list *proc, const char *result, const char *addargname,
116     const char *addargtype)
117 {
118
119         decl_list *l;
120
121         if (!newstyle) {
122                 /* old style: always pass argument by reference */
123                 f_print(fout, "(");
124                 ptype(proc->args.decls->decl.prefix,
125                       proc->args.decls->decl.type, 1);
126
127                 if (mtflag) {/* Generate result field */
128                         f_print(fout, "*argp, ");
129                         ptype(proc->res_prefix, proc->res_type, 1);
130                         f_print(fout, "*%s, %s%s)\n",
131                                 result, addargtype, addargname);
132                 } else
133                         f_print(fout, "*argp, %s%s)\n", addargtype, addargname);
134         } else if (streq(proc->args.decls->decl.type, "void")) {
135                 /* newstyle, 0 argument */
136                 if (mtflag) {
137                         f_print(fout, "(");
138                         ptype(proc->res_prefix, proc->res_type, 1);
139                         f_print(fout, "*%s, %s%s)\n",
140                                 result, addargtype, addargname);
141                 } else
142                         f_print(fout, "(%s%s)\n", addargtype, addargname);
143         } else {
144                 /* new style, 1 or multiple arguments */
145                 f_print(fout, "(");
146                 for (l = proc->args.decls; l != NULL; l = l->next) {
147                         pdeclaration(proc->args.argname, &l->decl, 0, ", ");
148                 }
149                 if (mtflag) {
150                         ptype(proc->res_prefix, proc->res_type, 1);
151                         f_print(fout, "*%s, ", result);
152
153                 }
154                 f_print(fout, "%s%s)\n", addargtype, addargname);
155         }
156 }
157
158
159
160 static const char *
161 ampr(const char *type)
162 {
163         if (isvectordef(type, REL_ALIAS)) {
164                 return ("");
165         } else {
166                 return ("&");
167         }
168 }
169
170 static void
171 printbody(proc_list *proc)
172 {
173         decl_list *l;
174         bool_t args2 = (proc->arg_num > 1);
175
176         /*
177          * For new style with multiple arguments, need a structure in which
178          *  to stuff the arguments.
179          */
180         
181
182         if (newstyle && args2) {
183                 f_print(fout, "\t%s", proc->args.argname);
184                 f_print(fout, " arg;\n");
185         }
186         if (!mtflag) {
187                 f_print(fout, "\tstatic ");
188                 if (streq(proc->res_type, "void")) {
189                         f_print(fout, "char ");
190                 } else {
191                         ptype(proc->res_prefix, proc->res_type, 0);
192                 }
193                 f_print(fout, "%s;\n", RESULT);
194                 f_print(fout, "\n");
195                 f_print(fout, "\tmemset((char *)%s%s, 0, sizeof (%s));\n",
196                         ampr(proc->res_type), RESULT, RESULT);
197
198         }
199         if (newstyle && !args2 &&
200             (streq(proc->args.decls->decl.type, "void"))) {
201                 /* newstyle, 0 arguments */
202
203                 if (mtflag)
204                         f_print(fout, "\t return ");
205                 else
206                         f_print(fout, "\t if ");
207
208                 f_print(fout,
209                         "(clnt_call(clnt, %s,\n\t\t(xdrproc_t) xdr_void, ",
210                         proc->proc_name);
211                 f_print(fout,
212                         "(caddr_t) NULL,\n\t\t(xdrproc_t) xdr_%s, (caddr_t) %s%s,",
213                         stringfix(proc->res_type), (mtflag)?"":ampr(proc->res_type),
214                         RESULT);
215
216                 if (mtflag)
217                         f_print(fout, "\n\t\tTIMEOUT));\n");
218                 else
219                         f_print(fout, "\n\t\tTIMEOUT) != RPC_SUCCESS) {\n");
220
221         } else if (newstyle && args2) {
222                 /*
223                  * Newstyle, multiple arguments
224                  * stuff arguments into structure
225                  */
226                 for (l = proc->args.decls;  l != NULL; l = l->next) {
227                         f_print(fout, "\targ.%s = %s;\n",
228                                 l->decl.name, l->decl.name);
229                 }
230                 if (mtflag)
231                         f_print(fout, "\treturn ");
232                 else
233                         f_print(fout, "\tif ");                 
234                 f_print(fout,
235                         "(clnt_call(clnt, %s,\n\t\t(xdrproc_t) xdr_%s",
236                         proc->proc_name,proc->args.argname);
237                 f_print(fout,
238                         ", (caddr_t) &arg,\n\t\t(xdrproc_t) xdr_%s, (caddr_t) %s%s,",
239                         stringfix(proc->res_type), (mtflag)?"":ampr(proc->res_type),
240                         RESULT);
241                 if (mtflag)
242                         f_print(fout, "\n\t\tTIMEOUT));\n");
243                 else
244                         f_print(fout, "\n\t\tTIMEOUT) != RPC_SUCCESS) {\n");
245         } else {                /* single argument, new or old style */
246                 if (!mtflag)
247                         f_print(fout,
248                         "\tif (clnt_call(clnt, %s,\n\t\t(xdrproc_t) xdr_%s, (caddr_t) %s%s,\n\t\t(xdrproc_t) xdr_%s, (caddr_t) %s%s,\n\t\tTIMEOUT) != RPC_SUCCESS) {\n",
249                         proc->proc_name,
250                         stringfix(proc->args.decls->decl.type),
251                         (newstyle ? "&" : ""),
252                         (newstyle ? proc->args.decls->decl.name : "argp"),
253                         stringfix(proc->res_type), ampr(proc->res_type),
254                         RESULT);
255                 else
256                         
257                 f_print(fout,
258                         "\treturn (clnt_call(clnt, %s,\n\t\t(xdrproc_t) xdr_%s, (caddr_t) %s%s,\n\t\t(xdrproc_t) xdr_%s, (caddr_t) %s%s,\n\t\tTIMEOUT));\n",
259                         proc->proc_name,
260                         stringfix(proc->args.decls->decl.type),
261                         (newstyle ? "&" : ""),
262                         (newstyle ? proc->args.decls->decl.name : "argp"),
263                         stringfix(proc->res_type), "",
264                         RESULT);
265         }
266         if (!mtflag) {
267                 f_print(fout, "\t\treturn (NULL);\n");
268                 f_print(fout, "\t}\n");
269
270                 if (streq(proc->res_type, "void")) {
271                         f_print(fout, "\treturn ((void *)%s%s);\n",
272                                 ampr(proc->res_type), RESULT);
273                 } else {
274                         f_print(fout, "\treturn (%s%s);\n",
275                                 ampr(proc->res_type), RESULT);
276                 }
277         }
278 }