xref: /freebsd/usr.bin/rpcgen/rpc_clntout.c (revision 9c067b844f85a224f0416e6eb46ba3ef82aec5c4)
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 }
279