xref: /src/usr.bin/rpcgen/rpc_clntout.c

/*	$NetBSD: rpc_clntout.c,v 1.15 2013/12/15 00:40:17 christos Exp $	*/
/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user or with the express written consent of
 * Sun Microsystems, Inc.
 *
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 *
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 *
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 *
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 *
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(lint)
#if 0
static char sccsid[] = "@(#)rpc_clntout.c 1.11 89/02/22 (C) 1987 SMI";
#else
__RCSID("$NetBSD: rpc_clntout.c,v 1.15 2013/12/15 00:40:17 christos Exp $");
#endif
#endif

/*
 * rpc_clntout.c, Client-stub outputter for the RPC protocol compiler
 * Copyright (C) 1987, Sun Microsytsems, Inc.
 */
#include <stdio.h>
#include <string.h>
#include <rpc/types.h>
#include "rpc_scan.h"
#include "rpc_parse.h"
#include "rpc_util.h"

static void write_program(definition *);
static const char *ampr(const char *);
static const char *aster(const char *);
static void printbody(proc_list *);

#define DEFAULT_TIMEOUT 25	/* in seconds */
static char RESULT[] = "clnt_res";


void
write_stubs(void)
{
	list   *l;
	definition *def;

	f_print(fout,
	    "\n/* Default timeout can be changed using clnt_control() */\n");
	f_print(fout, "static struct timeval TIMEOUT = { %d, 0 };\n",
	    DEFAULT_TIMEOUT);
	for (l = defined; l != NULL; l = l->next) {
		def = (definition *) l->val;
		if (def->def_kind == DEF_PROGRAM) {
			write_program(def);
		}
	}
}

static void
write_program(definition *def)
{
	version_list *vp;
	proc_list *proc;

	for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
		for (proc = vp->procs; proc != NULL; proc = proc->next) {
			f_print(fout, "\n");
			if (Mflag)
				f_print(fout, "enum clnt_stat\n");
			else {
				ptype(proc->res_prefix, proc->res_type, 1);
				f_print(fout, "*\n");
			}
			pvname(proc->proc_name, vp->vers_num);
			printarglist(proc, RESULT, "clnt", "CLIENT *");
			f_print(fout, "{\n");
			printbody(proc);
			f_print(fout, "}\n");
		}
	}
}
/* Writes out declarations of procedure's argument list.
   In either ANSI C style, in one of old rpcgen style (pass by reference),
   or new rpcgen style (multiple arguments, pass by value);
   */

/* sample addargname = "clnt"; sample addargtype = "CLIENT * " */

void
printarglist(proc_list *proc, const char *result,
	     const char *addargname, const char *addargtype)
{

	decl_list *l;

	if (!newstyle) {	/* old style: always pass argument by
				 * reference */
		f_print(fout, "(");
		ptype(proc->args.decls->decl.prefix, proc->args.decls->decl.type, 1);
		f_print(fout, "*argp, ");
		if (Mflag) {
			if (streq(proc->res_type, "void"))
				f_print(fout, "char ");
			else
				ptype(proc->res_prefix, proc->res_type, 0);
			f_print(fout, "%s%s, ", aster(proc->res_type),
			    result);
		}
		f_print(fout, "%s%s)\n", addargtype, addargname);
	} else {
		f_print(fout, "(");
		if (!streq(proc->args.decls->decl.type, "void")) {
			/* new style, 1 or multiple arguments */
			for (l = proc->args.decls; l != NULL; l = l->next)
				pdeclaration(proc->args.argname,
				    &l->decl, 0, ", ");
		}
		if (Mflag) {
			if (streq(proc->res_type, "void"))
				f_print(fout, "char ");
			else
				ptype(proc->res_prefix, proc->res_type, 0);
			f_print(fout, "%s%s, ", aster(proc->res_type),
			    result);
		}
		f_print(fout, "%s%s)\n", addargtype, addargname);
	}
}


static const char *
ampr(const char *type)
{
	if (isvectordef(type, REL_ALIAS)) {
		return ("");
	} else {
		return ("&");
	}
}

static const char *
aster(const char *type)
{
	if (isvectordef(type, REL_ALIAS)) {
		return ("");
	} else {
		return ("*");
	}
}

static void
printbody(proc_list *proc)
{
	decl_list *l;
	bool_t  args2 = (proc->arg_num > 1);

	/* For new style with multiple arguments, need a structure in which to
	 * stuff the arguments. */
	if (newstyle && args2) {
		f_print(fout, "\t%s", proc->args.argname);
		f_print(fout, " arg;\n");
	}
	if (!Mflag) {
		f_print(fout, "\tstatic ");
		if (streq(proc->res_type, "void"))
			f_print(fout, "char ");
		else
			ptype(proc->res_prefix, proc->res_type, 0);
		f_print(fout, "%s;\n", RESULT);
	}
	f_print(fout, "\n");
	if (!Mflag)
		f_print(fout, "\tmemset((char *)%s%s, 0, sizeof(%s));\n",
		    ampr(proc->res_type), RESULT, RESULT);
	if (newstyle && !args2 && (streq(proc->args.decls->decl.type, "void"))) {
		/* newstyle, 0 arguments */
		if (Mflag) {
			f_print(fout, "\treturn (clnt_call(clnt, %s, xdr_void",
			    proc->proc_name);
			f_print(fout, ", NULL, xdr_%s, %s, TIMEOUT));\n",
			    stringfix(proc->res_type), RESULT);
		} else {
			f_print(fout, "\tif (clnt_call(clnt, %s, xdr_void, ",
			    proc->proc_name);
			f_print(fout,
			    "NULL, xdr_%s, %s%s, TIMEOUT) != RPC_SUCCESS)\n",
			    stringfix(proc->res_type), ampr(proc->res_type),
			    RESULT);
		}
	} else {
		if (newstyle && args2) {
			/* newstyle, multiple arguments:  stuff arguments into
			 * structure */
			for (l = proc->args.decls; l != NULL; l = l->next) {
				f_print(fout, "\targ.%s = %s;\n",
				    l->decl.name, l->decl.name);
			}
			if (Mflag) {
				f_print(fout,
				    "\treturn (clnt_call(clnt, %s, xdr_%s, &arg, xdr_%s, %s, TIMEOUT));\n",
				    proc->proc_name, proc->args.argname,
				    stringfix(proc->res_type), RESULT);
			} else {
				f_print(fout,
				    "\tif (clnt_call(clnt, %s, xdr_%s, &arg, xdr_%s, %s%s, TIMEOUT) != RPC_SUCCESS)\n",
				    proc->proc_name, proc->args.argname,
				    stringfix(proc->res_type),
				    ampr(proc->res_type), RESULT);
			}
		} else {	/* single argument, new or old style */
			if (Mflag) {
				f_print(fout,
				    "\treturn (clnt_call(clnt, %s, xdr_%s, %s%s, xdr_%s, %s, TIMEOUT));\n",
				    proc->proc_name,
				    stringfix(proc->args.decls->decl.type),
				    (newstyle ? "&" : ""),
				    (newstyle ? proc->args.decls->decl.name : "argp"),
				    stringfix(proc->res_type), RESULT);
			} else {
				f_print(fout,
				    "\tif (clnt_call(clnt, %s, xdr_%s, %s%s, xdr_%s, %s%s, TIMEOUT) != RPC_SUCCESS)\n",
				    proc->proc_name,
				    stringfix(proc->args.decls->decl.type),
				    (newstyle ? "&" : ""),
				    (newstyle ? proc->args.decls->decl.name : "argp"),
				    stringfix(proc->res_type),
				    ampr(proc->res_type), RESULT);
			}
		}
	}
	if (!Mflag) {
		f_print(fout, "\t\treturn (NULL);\n");
		if (streq(proc->res_type, "void"))
			f_print(fout, "\treturn ((void *)%s%s);\n",
			    ampr(proc->res_type), RESULT);
		else
			f_print(fout, "\treturn (%s%s);\n",
			    ampr(proc->res_type), RESULT);
	}
}