/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

/*
 * rpc_sample.c, Sample client-server code outputter
 * for the RPC protocol compiler
 */

#include <stdio.h>
#include <string.h>
#include "rpc_parse.h"
#include "rpc_util.h"


static char RQSTP[] = "rqstp";

extern void printarglist(proc_list *, char *, char *, char *);

static void write_sample_client(char *, version_list *);
static void write_sample_server(definition *);
static void return_type(proc_list *);

void
write_sample_svc(definition *def)
{
	if (def->def_kind != DEF_PROGRAM)
		return;
	write_sample_server(def);
}

int
write_sample_clnt(definition *def)
{
	version_list *vp;
	int count = 0;

	if (def->def_kind != DEF_PROGRAM)
		return (0);
	/* generate sample code for each version */
	for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
		write_sample_client(def->def_name, vp);
		++count;
	}
	return (count);
}

static void
write_sample_client(char *program_name, version_list *vp)
{
	proc_list *proc;
	int i;
	decl_list *l;

	f_print(fout, "\n\nvoid\n");
	pvname(program_name, vp->vers_num);
	if (Cflag)
		f_print(fout, "(char *host)\n{\n");
	else
		f_print(fout, "(host)\n\tchar *host;\n{\n");
	f_print(fout, "\tCLIENT *clnt;\n");

	i = 0;
	for (proc = vp->procs; proc != NULL; proc = proc->next) {
		f_print(fout, "\t");
		if (mtflag) {
			f_print(fout, "enum clnt_stat retval_%d;\n", ++i);
			if (!streq(proc->res_type, "oneway")) {
				f_print(fout, "\t");
				if (!streq(proc->res_type, "void"))
					ptype(proc->res_prefix,
					    proc->res_type, 1);
				else
					f_print(fout, "void *");
				f_print(fout, "result_%d;\n", i);
			}
		} else {
			ptype(proc->res_prefix, proc->res_type, 1);
			f_print(fout, " *result_%d;\n", ++i);
		}
		/* print out declarations for arguments */
		if (proc->arg_num < 2 && !newstyle) {
			f_print(fout, "\t");
			if (!streq(proc->args.decls->decl.type, "void"))
				ptype(proc->args.decls->decl.prefix,
				    proc->args.decls->decl.type, 1);
			else
				/* cannot have "void" type */
				f_print(fout, "char * ");
			f_print(fout, " ");
			pvname(proc->proc_name, vp->vers_num);
			f_print(fout, "_arg;\n");
		} else if (!streq(proc->args.decls->decl.type, "void")) {
			for (l = proc->args.decls; l != NULL; l = l->next) {
				f_print(fout, "\t");
				ptype(l->decl.prefix, l->decl.type, 1);
				if (strcmp(l->decl.type, "string") == 1)
					f_print(fout, " ");
				pvname(proc->proc_name, vp->vers_num);
				f_print(fout, "_%s;\n", l->decl.name);
			}
		}
	}

	/* generate creation of client handle */
	f_print(fout, "\n#ifndef\tDEBUG\n");
	f_print(fout, "\tclnt = clnt_create(host, %s, %s, \"%s\");\n",
	    program_name, vp->vers_name, tirpcflag? "netpath" : "udp");
	f_print(fout, "\tif (clnt == (CLIENT *) NULL) {\n");
	f_print(fout, "\t\tclnt_pcreateerror(host);\n");
	f_print(fout, "\t\texit(1);\n\t}\n");
	f_print(fout, "#endif\t/* DEBUG */\n\n");

	/* generate calls to procedures */
	i = 0;
	for (proc = vp->procs; proc != NULL; proc = proc->next) {
		if (mtflag)
			f_print(fout, "\tretval_%d = ", ++i);
		else
			f_print(fout, "\tresult_%d = ", ++i);
		pvname(proc->proc_name, vp->vers_num);
		if (proc->arg_num < 2 && !newstyle) {
			f_print(fout, "(");
			if (streq(proc->args.decls->decl.type, "void"))
				/* cast to void * */
				f_print(fout, "(void *)");
			f_print(fout, "&");
			pvname(proc->proc_name, vp->vers_num);
			if (mtflag) {
				if (streq(proc->res_type, "oneway"))
					f_print(fout, "_arg, clnt);\n");
				else
					f_print(fout,
					    "_arg, &result_%d, clnt);\n", i);
			} else
				f_print(fout, "_arg, clnt);\n");

		} else if (streq(proc->args.decls->decl.type, "void")) {
			if (mtflag) {
				if (streq(proc->res_type, "oneway"))
					f_print(fout, "(clnt);\n");
				else
					f_print(fout,
					    "(&result_%d, clnt);\n", i);
			} else
				f_print(fout, "(clnt);\n");
		} else {
			f_print(fout, "(");
			for (l = proc->args.decls;  l != NULL; l = l->next) {
				pvname(proc->proc_name, vp->vers_num);
				f_print(fout, "_%s, ", l->decl.name);
			}
			if (mtflag) {
				if (!streq(proc->res_type, "oneway"))
					f_print(fout, "&result_%d, ", i);
			}

			f_print(fout, "clnt);\n");
		}
		if (mtflag) {
			f_print(fout, "\tif (retval_%d != RPC_SUCCESS) {\n", i);
		} else {
			f_print(fout, "\tif (result_%d == (", i);
			ptype(proc->res_prefix, proc->res_type, 1);
			f_print(fout, "*) NULL) {\n");
		}
		f_print(fout, "\t\tclnt_perror(clnt, \"call failed\");\n");
		f_print(fout, "\t}\n");
	}

	f_print(fout, "#ifndef\tDEBUG\n");
	f_print(fout, "\tclnt_destroy(clnt);\n");
	f_print(fout, "#endif\t	/* DEBUG */\n");
	f_print(fout, "}\n");
}

static void
write_sample_server(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 (!mtflag) {
				return_type(proc);
				f_print(fout, "*\n");
			} else {
				f_print(fout, "bool_t\n");
			}
			if (Cflag || mtflag)
				pvname_svc(proc->proc_name, vp->vers_num);
			else
				pvname(proc->proc_name, vp->vers_num);
			printarglist(proc, "result", RQSTP, "struct svc_req *");

			f_print(fout, "{\n");

			if (!mtflag) {
				f_print(fout, "\tstatic ");
				if ((!streq(proc->res_type, "void")) &&
				    (!streq(proc->res_type, "oneway")))
					return_type(proc);
				else
					f_print(fout, "char *");
				/* cannot have void type */
				f_print(fout, " result;\n");
			}

			f_print(fout, "\n\t/*\n\t * insert server code "
			    "here\n\t */\n\n");

			if (!mtflag)
				if (!streq(proc->res_type, "void"))
					f_print(fout,
					    "\treturn (&result);\n}\n");
				else /* cast back to void * */
					f_print(fout, "\treturn((void *) "
					    "&result);\n}\n");
			else
				f_print(fout, "\treturn (retval);\n}\n");
		}
		/* put in sample freeing routine */
		if (mtflag) {
			f_print(fout, "\nint\n");
			pvname(def->def_name, vp->vers_num);
			if (Cflag)
				f_print(fout, "_freeresult(SVCXPRT *transp,"
				    " xdrproc_t xdr_result,"
				    " caddr_t result)\n");
			else {
				f_print(fout, "_freeresult(transp, xdr_result,"
				    " result)\n");
				f_print(fout, "\tSVCXPRT *transp;\n");
				f_print(fout, "\txdrproc_t xdr_result;\n");
				f_print(fout, "\tcaddr_t result;\n");
			}
			f_print(fout, "{\n"
			    "\t(void) xdr_free(xdr_result, result);\n"
			    "\n\t/*\n\t * Insert additional freeing"
			    " code here, if needed\n\t */\n"
			    "\n\n\treturn (TRUE);\n}\n");
		}
	}
}

static void
return_type(proc_list *plist)
{
	ptype(plist->res_prefix, plist->res_type, 1);
}

void
add_sample_msg(void)
{
	f_print(fout, "/*\n");
	f_print(fout, " * This is sample code generated by rpcgen.\n");
	f_print(fout, " * These are only templates and you can use them\n");
	f_print(fout, " * as a guideline for developing your own functions.\n");
	f_print(fout, " */\n\n");
}

void
write_sample_clnt_main(void)
{
	list *l;
	definition *def;
	version_list *vp;

	f_print(fout, "\n\n");
	if (Cflag)
		f_print(fout, "int\nmain(int argc, char *argv[])\n{\n");
	else
		f_print(fout, "int\nmain(argc, argv)\n\tint argc;\n"
		    "\tchar *argv[];\n{\n");

	f_print(fout, "\tchar *host;");
	f_print(fout, "\n\n\tif (argc < 2) {");
	f_print(fout, "\n\t\tprintf(\"usage:  %%s server_host\\n\","
	    " argv[0]);\n");
	f_print(fout, "\t\texit(1);\n\t}");
	f_print(fout, "\n\thost = argv[1];\n");

	for (l = defined; l != NULL; l = l->next) {
		def = l->val;
		if (def->def_kind != DEF_PROGRAM)
			continue;
		for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
			f_print(fout, "\t");
			pvname(def->def_name, vp->vers_num);
			f_print(fout, "(host);\n");
		}
	}
	f_print(fout, "}\n");
}