glibc/sunrpc/rpc_clntout.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 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
 */

/*
 * From: @(#)rpc_clntout.c 1.11 89/02/22 (C) 1987 SMI
 */
char clntout_rcsid[] = 
  "$Id$";

/*
 * 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 "proto.h"

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

static void write_program(definition *def);
static void printbody(proc_list *proc);
static const char *ampr(const char *type);
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, 
		  const char *addargname, const char *addargtype)
{

  decl_list *l;

  if (!newstyle) {    /* old style: always pass argument 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 
const char *
ampr(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);
/*  int i; */

  /* 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, 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);
	  }
	  f_print(fout,
		  "\tif (clnt_call(clnt, %s, xdr_%s", proc->proc_name,
		  proc->args.argname);
	  f_print(fout, 
 		      ", &arg, xdr_%s, %s%s, TIMEOUT) != RPC_SUCCESS) {\n",
 		  stringfix(proc->res_type), ampr(proc->res_type), RESULT);
	} else {  /* single argument, new or old style */
	      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);
	    }
	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);
	}
}