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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 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_sample.c  1.1  90/08/30  (C) 1987 SMI
 */
char sample_rcsid[] =
  "$Id: rpc_sample.c,v 1.5 1998/11/16 11:56:33 drepper Exp $";

/*
 * 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"
#include "proto.h"


static const char RQSTP[] = "rqstp";

static void write_sample_client (const 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 (const 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");
      ++i;
      if (mtflag)
      {
        f_print (fout, "enum clnt_stat retval_%d;\n\t", i);
        ptype (proc->res_prefix, proc->res_type, 1);
        if (!streq (proc->res_type, "void"))
          f_print (fout, "result_%d;\n", i);
        else
          fprintf (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);
            f_print (fout, " ");
          }
        else
          f_print (fout, "char *"); /* cannot have "void" type */
        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 == 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 (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", proc->res_type); */
            f_print(fout, " result;\n");
          }
        else
          f_print(fout, "\tbool_t retval;\n");
        fprintf (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, "\txdr_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\treturn 1;\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)\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, "exit (0);\n}\n");
}

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