/*
 * 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_sample.c  1.1  90/08/30  (C) 1987 SMI";

#endif

/*
 * 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";

static void	write_sample_client(char *program_name, version_list *vp);
static void	write_sample_server(definition * def);
static void	return_type(proc_list *plist);

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)\nchar *host;\n{\n");
	f_print(fout, "\tCLIENT *clnt;\n");

	i = 0;
	for (proc = vp->procs; proc != NULL; proc = proc->next) {
		f_print(fout, "\t");
		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
				f_print(fout, "char* ");	/* cannot have "void" type */
			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);
				f_print(fout, " ");
				pvname(proc->proc_name, vp->vers_num);
				f_print(fout, "_%s;\n", l->decl.name);
				/*	  pdeclaration(proc->args.argname, &l->decl, 1, ";\n" );*/
			}
		}
	}

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

	/* generate calls to procedures */
	i = 0;
	for (proc = vp->procs; proc != NULL; proc = proc->next) {
		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);
			f_print(fout, "_arg, clnt);\n");
		} else if (streq(proc->args.decls->decl.type, "void")) {
			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);
			}
			f_print(fout, "clnt);\n");
		}
		f_print(fout, "\tif (result_%d == NULL) {\n", i);
		f_print(fout, "\t\tclnt_perror(clnt, \"call failed:\");\n");
		f_print(fout, "\t}\n");
	}

	f_print(fout, "\tclnt_destroy( clnt );\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( Cflag )
			  f_print( fout, "extern \"C\"{\n");
*/
			return_type(proc);
			f_print(fout, "* \n");
			if (Cflag)
				pvname_svc(proc->proc_name, vp->vers_num);
			else
				pvname(proc->proc_name, vp->vers_num);
			printarglist(proc, RQSTP, "struct svc_req *");

			f_print(fout, "{\n");
			f_print(fout, "\n\tstatic ");
			if (!streq(proc->res_type, "void"))
				return_type(proc);
			else
				f_print(fout, "char*");	/* cannot have void type */
			/* f_print(fout, " result;\n", proc->res_type); */
			f_print(fout, " result;\n");
			f_print(fout,
				"\n\t/*\n\t * insert server code here\n\t */\n\n");
			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");
			/*			if( Cflag)
			  f_print( fout, "};\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,"main( int argc, char* argv[] )\n{\n" );
  else
    f_print(fout, "main(argc, argv)\nint argc;\nchar *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");
}