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 Microsystems, 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 const 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);
    }
}