/*
 * Copyright (c) 2009, Sun Microsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of Sun Microsystems, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#if 0
static char sccsid[] = "@(#)rpc_clntout.c 1.11 89/02/22 (C) 1987 SMI";
#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_parse.h"
#include "rpc_util.h"
#include "rpc_output.h"

/* extern pdeclaration(); */
/* void printarglist(); */

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

static void	write_program(definition *def);
static void	printbody(proc_list *proc);


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");
			ptype(proc->res_prefix, proc->res_type, 1);
			f_print(fout, "*\n");
			pvname(proc->proc_name, vp->vers_num);
			printarglist(proc, "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, char *addargname, char *addargtype)
{

	decl_list      *l;

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

	if (!Cflag)
		f_print(fout, "\t%s%s;\n", addargtype, addargname);
}


static char *
ampr(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");
	}
	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");
	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 */
		f_print(fout,
			"\tif (clnt_call(clnt, %s, (xdrproc_t) xdr_void, (caddr_t) NULL, "
			"(xdrproc_t) xdr_%s, (caddr_t) %s%s, TIMEOUT) != RPC_SUCCESS) {\n",
			proc->proc_name,
			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);
		}
		f_print(fout,
			"\tif (clnt_call(clnt, %s, (xdrproc_t) xdr_%s, (caddr_t) &arg, "
			"(xdrproc_t) xdr_%s, (caddr_t) %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 */
		f_print(fout,
			"\tif (clnt_call(clnt, %s, (xdrproc_t) xdr_%s, "
			"(caddr_t) %s%s, (xdrproc_t) xdr_%s, (caddr_t) %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);
	}
	f_print(fout, "\t\treturn (NULL);\n");
	f_print(fout, "\t}\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);
	}
}