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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 /*
31  * rpc_clntout.c, Client-stub outputter for the RPC protocol compiler
32  * Copyright (C) 1987, Sun Microsytsems, Inc.
33  */
34 #include <stdio.h>
35 #include <string.h>
36 #include <rpc/types.h>
37 #include "rpc_parse.h"
38 #include "rpc_scan.h"
39 #include "rpc_util.h"
40
41 static void write_program( definition * );
42 static void printbody( proc_list * );
43
44 static char RESULT[] = "clnt_res";
45
46
47 #define DEFAULT_TIMEOUT 25      /* in seconds */
48
49
50 void
51 write_stubs(void)
52 {
53         list *l;
54         definition *def;
55
56         f_print(fout,
57                 "\n/* Default timeout can be changed using clnt_control() */\n");
58         f_print(fout, "static struct timeval TIMEOUT = { %d, 0 };\n",
59                 DEFAULT_TIMEOUT);
60         for (l = defined; l != NULL; l = l->next) {
61                 def = (definition *) l->val;
62                 if (def->def_kind == DEF_PROGRAM) {
63                         write_program(def);
64                 }
65         }
66 }
67
68 static void
69 write_program(definition *def)
70 {
71         version_list *vp;
72         proc_list *proc;
73
74         for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
75                 for (proc = vp->procs; proc != NULL; proc = proc->next) {
76                         f_print(fout, "\n");
77                         if (mtflag == 0) {
78                                 ptype(proc->res_prefix, proc->res_type, 1);
79                                 f_print(fout, "*\n");
80                                 pvname(proc->proc_name, vp->vers_num);
81                                 printarglist(proc, RESULT, "clnt", "CLIENT *");
82                         } else {
83                                 f_print(fout, "enum clnt_stat \n");
84                                 pvname(proc->proc_name, vp->vers_num);
85                                 printarglist(proc, RESULT,  "clnt", "CLIENT *");
86
87                         }
88                         f_print(fout, "{\n");
89                         printbody(proc);
90
91                         f_print(fout, "}\n");
92                 }
93         }
94 }
95
96 /*
97  * Writes out declarations of procedure's argument list.
98  * In either ANSI C style, in one of old rpcgen style (pass by reference),
99  * or new rpcgen style (multiple arguments, pass by value);
100  */
101
102 /* sample addargname = "clnt"; sample addargtype = "CLIENT * " */
103
104 void
105 printarglist(proc_list *proc, const char *result, const char *addargname,
106     const char *addargtype)
107 {
108
109         decl_list *l;
110
111         if (!newstyle) {
112                 /* old style: always pass argument by reference */
113                 f_print(fout, "(");
114                 ptype(proc->args.decls->decl.prefix,
115                       proc->args.decls->decl.type, 1);
116
117                 if (mtflag) {/* Generate result field */
118                         f_print(fout, "*argp, ");
119                         ptype(proc->res_prefix, proc->res_type, 1);
120                         f_print(fout, "*%s, %s%s)\n",
121                                 result, addargtype, addargname);
122                 } else
123                         f_print(fout, "*argp, %s%s)\n", addargtype, addargname);
124         } else if (streq(proc->args.decls->decl.type, "void")) {
125                 /* newstyle, 0 argument */
126                 if (mtflag) {
127                         f_print(fout, "(");
128                         ptype(proc->res_prefix, proc->res_type, 1);
129                         f_print(fout, "*%s, %s%s)\n",
130                                 result, addargtype, addargname);
131                 } else
132                         f_print(fout, "(%s%s)\n", addargtype, addargname);
133         } else {
134                 /* new style, 1 or multiple arguments */
135                 f_print(fout, "(");
136                 for (l = proc->args.decls; l != NULL; l = l->next) {
137                         pdeclaration(proc->args.argname, &l->decl, 0, ", ");
138                 }
139                 if (mtflag) {
140                         ptype(proc->res_prefix, proc->res_type, 1);
141                         f_print(fout, "*%s, ", result);
142
143                 }
144                 f_print(fout, "%s%s)\n", addargtype, addargname);
145         }
146 }
147
148
149
150 static const char *
151 ampr(const char *type)
152 {
153         if (isvectordef(type, REL_ALIAS)) {
154                 return ("");
155         } else {
156                 return ("&");
157         }
158 }
159
160 static void
161 printbody(proc_list *proc)
162 {
163         decl_list *l;
164         bool_t args2 = (proc->arg_num > 1);
165
166         /*
167          * For new style with multiple arguments, need a structure in which
168          *  to stuff the arguments.
169          */
170         
171
172         if (newstyle && args2) {
173                 f_print(fout, "\t%s", proc->args.argname);
174                 f_print(fout, " arg;\n");
175         }
176         if (!mtflag) {
177                 f_print(fout, "\tstatic ");
178                 if (streq(proc->res_type, "void")) {
179                         f_print(fout, "char ");
180                 } else {
181                         ptype(proc->res_prefix, proc->res_type, 0);
182                 }
183                 f_print(fout, "%s;\n", RESULT);
184                 f_print(fout, "\n");
185                 f_print(fout, "\tmemset((char *)%s%s, 0, sizeof (%s));\n",
186                         ampr(proc->res_type), RESULT, RESULT);
187
188         }
189         if (newstyle && !args2 &&
190             (streq(proc->args.decls->decl.type, "void"))) {
191                 /* newstyle, 0 arguments */
192
193                 if (mtflag)
194                         f_print(fout, "\t return ");
195                 else
196                         f_print(fout, "\t if ");
197
198                 f_print(fout,
199                         "(clnt_call(clnt, %s,\n\t\t(xdrproc_t) xdr_void, ",
200                         proc->proc_name);
201                 f_print(fout,
202                         "(caddr_t) NULL,\n\t\t(xdrproc_t) xdr_%s, (caddr_t) %s%s,",
203                         stringfix(proc->res_type), (mtflag)?"":ampr(proc->res_type),
204                         RESULT);
205
206                 if (mtflag)
207                         f_print(fout, "\n\t\tTIMEOUT));\n");
208                 else
209                         f_print(fout, "\n\t\tTIMEOUT) != RPC_SUCCESS) {\n");
210
211         } else if (newstyle && args2) {
212                 /*
213                  * Newstyle, multiple arguments
214                  * stuff arguments into structure
215                  */
216                 for (l = proc->args.decls;  l != NULL; l = l->next) {
217                         f_print(fout, "\targ.%s = %s;\n",
218                                 l->decl.name, l->decl.name);
219                 }
220                 if (mtflag)
221                         f_print(fout, "\treturn ");
222                 else
223                         f_print(fout, "\tif ");                 
224                 f_print(fout,
225                         "(clnt_call(clnt, %s,\n\t\t(xdrproc_t) xdr_%s",
226                         proc->proc_name,proc->args.argname);
227                 f_print(fout,
228                         ", (caddr_t) &arg,\n\t\t(xdrproc_t) xdr_%s, (caddr_t) %s%s,",
229                         stringfix(proc->res_type), (mtflag)?"":ampr(proc->res_type),
230                         RESULT);
231                 if (mtflag)
232                         f_print(fout, "\n\t\tTIMEOUT));\n");
233                 else
234                         f_print(fout, "\n\t\tTIMEOUT) != RPC_SUCCESS) {\n");
235         } else {                /* single argument, new or old style */
236                 if (!mtflag)
237                         f_print(fout,
238                         "\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",
239                         proc->proc_name,
240                         stringfix(proc->args.decls->decl.type),
241                         (newstyle ? "&" : ""),
242                         (newstyle ? proc->args.decls->decl.name : "argp"),
243                         stringfix(proc->res_type), ampr(proc->res_type),
244                         RESULT);
245                 else
246                         
247                 f_print(fout,
248                         "\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",
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), "",
254                         RESULT);
255         }
256         if (!mtflag) {
257                 f_print(fout, "\t\treturn (NULL);\n");
258                 f_print(fout, "\t}\n");
259
260                 if (streq(proc->res_type, "void")) {
261                         f_print(fout, "\treturn ((void *)%s%s);\n",
262                                 ampr(proc->res_type), RESULT);
263                 } else {
264                         f_print(fout, "\treturn (%s%s);\n",
265                                 ampr(proc->res_type), RESULT);
266                 }
267         }
268 }