usr.bin/rpcgen/rpc_sample.c

/*
 * 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.
 *
 * 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
 */

#pragma ident	"@(#)rpc_sample.c	1.9	94/04/25 SMI"

/*
 * rpc_sample.c, Sample client-server code outputter for the RPC protocol compiler
 * Copyright (C) 1987, Sun Microsystems, Inc.
 */

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


static char RQSTP[] = "rqstp";

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

void
write_sample_svc(def)
     definition *def;
{

	if (def->def_kind != DEF_PROGRAM)
	  return;
	write_sample_server(def);
}


int
write_sample_clnt(def)
     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(program_name, vp)
     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\t", ++i);
			ptype(proc->res_prefix, proc->res_type, 1);
			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
				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);
				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)
				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)
				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)
				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(def)
	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"))
					return_type(proc);
				else
					f_print(fout, "char *");
				/* cannot have void type */
				f_print(fout, " result;\n");
			}
			else
				f_print(fout, "\tbool_t retval;\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");
		f_print(fout, "\t(void) xdr_free(xdr_result, result);\n");
		f_print(fout,
			"\n\t/*\n\t * Insert additional freeing code here, if needed\n\t */\n");
		f_print(fout, "\n}\n");


	}
	}
}


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

void
add_sample_msg()
{
	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()
{
	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)\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");
}