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path: root/sunrpc/rpc_cout.c
blob: 44ff8d59b5bece6923c3b96ecb56361c44f95d13 (plain) (blame)
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/*
 * 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_cout.c 1.13 89/02/22 (C) 1987 SMI
 */
char cout_rcsid[] =
"$Id$";

/*
 * rpc_cout.c, XDR routine outputter for the RPC protocol compiler
 */
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include "rpc_parse.h"
#include "rpc_util.h"
#include "proto.h"

static void emit_enum (definition * def);
static void emit_program (const definition * def);
static void emit_union (const definition * def);
static void emit_struct (definition * def);
static void emit_typedef (const definition * def);
static void emit_inline (int indent, declaration * decl, int flag);
static void emit_single_in_line (int indent, declaration *decl, int flag,
				 relation rel);
static int findtype (const definition * def, const char *type);
static int undefined (const char *type);
static void print_generic_header (const char *procname, int pointerp);
static void print_ifopen (int indent, const char *name);
static void print_ifarg (const char *arg);
static void print_ifsizeof (int indent, const char *prefix, const char *type);
static void print_ifclose (int indent);
static void print_ifstat (int indent, const char *prefix, const char *type,
			  relation rel, const char *amax,
			  const char *objname, const char *name);
static void print_stat (int indent, const declaration * dec);
static void print_header (const definition * def);
static void print_trailer (void);
static char *upcase (const char *str);

/*
 * Emit the C-routine for the given definition
 */
void
emit (definition * def)
{
  if (def->def_kind == DEF_CONST)
    {
      return;
    }
  if (def->def_kind == DEF_PROGRAM)
    {
      emit_program (def);
      return;
    }
  if (def->def_kind == DEF_TYPEDEF)
    {
      /* now we need to handle declarations like
         struct typedef foo foo;
         since we don't want this to be expanded
         into 2 calls to xdr_foo */

      if (strcmp (def->def.ty.old_type, def->def_name) == 0)
	return;
    };

  print_header (def);
  switch (def->def_kind)
    {
    case DEF_UNION:
      emit_union (def);
      break;
    case DEF_ENUM:
      emit_enum (def);
      break;
    case DEF_STRUCT:
      emit_struct (def);
      break;
    case DEF_TYPEDEF:
      emit_typedef (def);
      break;
    default:
      /* can't happen */
      break;
    }
  print_trailer ();
}

static int
findtype (const definition * def, const char *type)
{
  if (def->def_kind == DEF_PROGRAM || def->def_kind == DEF_CONST)
    {
      return 0;
    }
  else
    {
      return (streq (def->def_name, type));
    }
}

static int
undefined (const char *type)
{
  definition *def;
  def = (definition *) FINDVAL (defined, type, findtype);
  return (def == NULL);
}


static void
print_generic_header (const char *procname, int pointerp)
{
  f_print (fout, "\n");
  f_print (fout, "bool_t\n");
  if (Cflag)
    {
      f_print (fout, "xdr_%s (", procname);
      f_print (fout, "XDR *xdrs, ");
      f_print (fout, "%s ", procname);
      if (pointerp)
	f_print (fout, "*");
      f_print (fout, "objp)\n{\n");
    }
  else
    {
      f_print (fout, "xdr_%s (xdrs, objp)\n", procname);
      f_print (fout, "\tXDR *xdrs;\n");
      f_print (fout, "\t%s ", procname);
      if (pointerp)
	f_print (fout, "*");
      f_print (fout, "objp;\n{\n");
    }
}

static void
print_header (const definition * def)
{
  print_generic_header (def->def_name,
			def->def_kind != DEF_TYPEDEF ||
			!isvectordef (def->def.ty.old_type,
				      def->def.ty.rel));

  /* Now add Inline support */

  if (inlineflag == 0)
    return;
  /*May cause lint to complain. but  ... */
  f_print (fout, "\t register long *buf;\n\n");
}

static void
print_prog_header (const proc_list * plist)
{
  print_generic_header (plist->args.argname, 1);
}

static void
print_trailer (void)
{
  f_print (fout, "\treturn TRUE;\n");
  f_print (fout, "}\n");
}


static void
print_ifopen (int indent, const char *name)
{
  tabify (fout, indent);
  f_print (fout, " if (!xdr_%s (xdrs", name);
}

static void
print_ifarg (const char *arg)
{
  f_print (fout, ", %s", arg);
}

static void
print_ifsizeof (int indent, const char *prefix, const char *type)
{
  if (indent)
    {
      fprintf (fout, ",\n");
      tabify (fout, indent);
    }
  else
    fprintf (fout, ", ");

  if (streq (type, "bool"))
    fprintf (fout, "sizeof (bool_t), (xdrproc_t) xdr_bool");
  else
    {
      fprintf (fout, "sizeof (");
      if (undefined (type) && prefix)
	{
	  f_print (fout, "%s ", prefix);
	}
      fprintf (fout, "%s), (xdrproc_t) xdr_%s", type, type);
    }
}

static void
print_ifclose (int indent)
{
  f_print (fout, "))\n");
  tabify (fout, indent);
  f_print (fout, "\t return FALSE;\n");
}

static void
print_ifstat (int indent, const char *prefix, const char *type, relation rel,
	      const char *amax, const char *objname, const char *name)
{
  const char *alt = NULL;

  switch (rel)
    {
    case REL_POINTER:
      print_ifopen (indent, "pointer");
      print_ifarg ("(char **)");
      f_print (fout, "%s", objname);
      print_ifsizeof (0, prefix, type);
      break;
    case REL_VECTOR:
      if (streq (type, "string"))
	{
	  alt = "string";
	}
      else if (streq (type, "opaque"))
	{
	  alt = "opaque";
	}
      if (alt)
	{
	  print_ifopen (indent, alt);
	  print_ifarg (objname);
	}
      else
	{
	  print_ifopen (indent, "vector");
	  print_ifarg ("(char *)");
	  f_print (fout, "%s", objname);
	}
      print_ifarg (amax);
      if (!alt)
	{
	  print_ifsizeof (indent + 1, prefix, type);
	}
      break;
    case REL_ARRAY:
      if (streq (type, "string"))
	{
	  alt = "string";
	}
      else if (streq (type, "opaque"))
	{
	  alt = "bytes";
	}
      if (streq (type, "string"))
	{
	  print_ifopen (indent, alt);
	  print_ifarg (objname);
	}
      else
	{
	  if (alt)
	    {
	      print_ifopen (indent, alt);
	    }
	  else
	    {
	      print_ifopen (indent, "array");
	    }
	  print_ifarg ("(char **)");
	  if (*objname == '&')
	    {
	      f_print (fout, "%s.%s_val, (u_int *) %s.%s_len",
		       objname, name, objname, name);
	    }
	  else
	    {
	      f_print (fout, "&%s->%s_val, (u_int *) &%s->%s_len",
		       objname, name, objname, name);
	    }
	}
      print_ifarg (amax);
      if (!alt)
	{
	  print_ifsizeof (indent + 1, prefix, type);
	}
      break;
    case REL_ALIAS:
      print_ifopen (indent, type);
      print_ifarg (objname);
      break;
    }
  print_ifclose (indent);
}

static void
emit_enum (definition * def)
{
  (void) def;

  print_ifopen (1, "enum");
  print_ifarg ("(enum_t *) objp");
  print_ifclose (1);
}

static void
emit_program (const definition * def)
{
  decl_list *dl;
  version_list *vlist;
  proc_list *plist;

  for (vlist = def->def.pr.versions; vlist != NULL; vlist = vlist->next)
    for (plist = vlist->procs; plist != NULL; plist = plist->next)
      {
	if (!newstyle || plist->arg_num < 2)
	  continue;		/* old style, or single argument */
	print_prog_header (plist);
	for (dl = plist->args.decls; dl != NULL;
	     dl = dl->next)
	  print_stat (1, &dl->decl);
	print_trailer ();
      }
}

static void
emit_union (const definition * def)
{
  declaration *dflt;
  case_list *cl;
  declaration *cs;
  char *object;
  const char *vecformat = "objp->%s_u.%s";
  const char *format = "&objp->%s_u.%s";

  print_stat (1, &def->def.un.enum_decl);
  f_print (fout, "\tswitch (objp->%s) {\n", def->def.un.enum_decl.name);
  for (cl = def->def.un.cases; cl != NULL; cl = cl->next)
    {

      f_print (fout, "\tcase %s:\n", cl->case_name);
      if (cl->contflag == 1)	/* a continued case statement */
	continue;
      cs = &cl->case_decl;
      if (!streq (cs->type, "void"))
	{
	  object = alloc (strlen (def->def_name) + strlen (format) +
			  strlen (cs->name) + 1);
	  if (isvectordef (cs->type, cs->rel))
	    {
	      s_print (object, vecformat, def->def_name,
		       cs->name);
	    }
	  else
	    {
	      s_print (object, format, def->def_name,
		       cs->name);
	    }
	  print_ifstat (2, cs->prefix, cs->type, cs->rel, cs->array_max,
			object, cs->name);
	  free (object);
	}
      f_print (fout, "\t\tbreak;\n");
    }
  dflt = def->def.un.default_decl;
  if (dflt != NULL)
    {
      if (!streq (dflt->type, "void"))
	{
	  f_print (fout, "\tdefault:\n");
	  object = alloc (strlen (def->def_name) + strlen (format) +
			  strlen (dflt->name) + 1);
	  if (isvectordef (dflt->type, dflt->rel))
	    {
	      s_print (object, vecformat, def->def_name,
		       dflt->name);
	    }
	  else
	    {
	      s_print (object, format, def->def_name,
		       dflt->name);
	    }

	  print_ifstat (2, dflt->prefix, dflt->type, dflt->rel,
			dflt->array_max, object, dflt->name);
	  free (object);
	  f_print (fout, "\t\tbreak;\n");
	}
#ifdef __GNU_LIBRARY__
      else
	{
	  f_print (fout, "\tdefault:\n");
	  f_print (fout, "\t\tbreak;\n");
	}
#endif
    }
  else
    {
      f_print (fout, "\tdefault:\n");
      f_print (fout, "\t\treturn FALSE;\n");
    }

  f_print (fout, "\t}\n");
}

static void
inline_struct (definition *def, int flag)
{
  decl_list *dl;
  int i, size;
  decl_list *cur, *psav;
  bas_type *ptr;
  char *sizestr, *plus;
  char ptemp[256];
  int indent = 1;

  if (flag == PUT)
    f_print (fout, "\n\tif (xdrs->x_op == XDR_ENCODE) {\n");
  else
    f_print(fout,
	    "\t\treturn TRUE;\n\t} else if (xdrs->x_op == XDR_DECODE) {\n");

  i = 0;
  size = 0;
  sizestr = NULL;
  for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
    {			/* xxx */
      /* now walk down the list and check for basic types */
      if ((dl->decl.prefix == NULL) &&
	  ((ptr = find_type (dl->decl.type)) != NULL) &&
	  ((dl->decl.rel == REL_ALIAS) || (dl->decl.rel == REL_VECTOR)))
	{
	  if (i == 0)
	    cur = dl;
	  ++i;

	  if (dl->decl.rel == REL_ALIAS)
	    size += ptr->length;
	  else
	    {
	      /* this is required to handle arrays */
	      if (sizestr == NULL)
		plus = "";
	      else
		plus = "+ ";

	      if (ptr->length != 1)
		s_print (ptemp, " %s %s * %d", plus, dl->decl.array_max,
			 ptr->length);
	      else
		s_print (ptemp, " %s%s ", plus, dl->decl.array_max);

	      /*now concatenate to sizestr !!!! */
	      if (sizestr == NULL)
		sizestr = strdup (ptemp);
	      else
		{
		  sizestr = realloc (sizestr, strlen (sizestr) +
				     strlen (ptemp) + 1);
		  if (sizestr == NULL)
		    {
		      f_print (stderr, "Fatal error : no memory \n");
		      crash ();
		    };
		  sizestr = strcat (sizestr, ptemp);
		  /*build up length of array */
		}
	    }
	}
      else
	{
	  if (i > 0)
	    if (sizestr == NULL && size < inlineflag)
	      {
		/* don't expand into inline code if size < inlineflag */
		while (cur != dl)
		  {
		    print_stat (indent + 1, &cur->decl);
		    cur = cur->next;
		  }
	      }
	    else
	      {
		/* were already looking at a xdr_inlineable structure */
		tabify (fout, indent + 1);
		if (sizestr == NULL)
		  f_print (fout, "buf = XDR_INLINE (xdrs, %d * BYTES_PER_XDR_UNIT);", size);
		else if (size == 0)
		  f_print (fout,
			   "buf = XDR_INLINE (xdrs, %s * BYTES_PER_XDR_UNIT);",
			   sizestr);
		else
		  f_print (fout,
			   "buf = XDR_INLINE(xdrs, (%d + (%s)) * BYTES_PER_XDR_UNIT);",
			   size, sizestr);
		f_print (fout, "\n");
		tabify (fout, indent + 1);
		fprintf (fout, "if (buf == NULL) {\n");
		psav = cur;
		while (cur != dl)
		  {
		    print_stat (indent + 2, &cur->decl);
		    cur = cur->next;
		  }

		f_print (fout, "\n\t\t} else {\n");
		cur = psav;
		while (cur != dl)
		  {
		    emit_inline (indent + 1, &cur->decl, flag);
		    cur = cur->next;
		  }
		tabify (fout, indent + 1);
		f_print (fout, "}\n");
	      }
	  size = 0;
	  i = 0;
	  sizestr = NULL;
	  print_stat (indent + 1, &dl->decl);
	}
    }
  if (i > 0)
    if (sizestr == NULL && size < inlineflag)
      {
	/* don't expand into inline code if size < inlineflag */
	while (cur != dl)
	  {
	    print_stat (indent + 1, &cur->decl);
	    cur = cur->next;
	  }
      }
    else
      {
	/* were already looking at a xdr_inlineable structure */
	if (sizestr == NULL)
	  f_print (fout, "\t\tbuf = XDR_INLINE(xdrs,%d * BYTES_PER_XDR_UNIT);",
		   size);
	else if (size == 0)
	  f_print (fout,
		   "\t\tbuf = XDR_INLINE(xdrs,%s * BYTES_PER_XDR_UNIT);",
		   sizestr);
	else
	  f_print (fout,
		   "\t\tbuf = XDR_INLINE(xdrs,(%d + %s)* BYTES_PER_XDR_UNIT);",
		   size, sizestr);
	f_print (fout, "\n\t\tif (buf == NULL) {\n");
	psav = cur;
	while (cur != NULL)
	  {
	    print_stat (indent + 2, &cur->decl);
	    cur = cur->next;
	  }
	f_print (fout, "\t\t} else {\n");

	cur = psav;
	while (cur != dl)
	  {
	    emit_inline (indent + 2, &cur->decl, flag);
	    cur = cur->next;
	  }
	f_print (fout, "\t\t}\n");
      }
}

/* this may be const.  i haven't traced this one through yet. */

static void
emit_struct (definition * def)
{
  decl_list *dl;
  int j, size, flag;
  bas_type *ptr;
  int can_inline;


  if (inlineflag == 0)
    {
      /* No xdr_inlining at all */
      for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
	print_stat (1, &dl->decl);
      return;
    }

  for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
    if (dl->decl.rel == REL_VECTOR)
      {
	f_print (fout, "\tint i;\n");
	break;
      }

  size = 0;
  can_inline = 0;
  /*
   * Make a first pass and see if inling is possible.
   */
  for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
    if ((dl->decl.prefix == NULL) &&
	((ptr = find_type (dl->decl.type)) != NULL) &&
	((dl->decl.rel == REL_ALIAS) || (dl->decl.rel == REL_VECTOR)))
      {
	if (dl->decl.rel == REL_ALIAS)
	  size += ptr->length;
	else
	  {
	    can_inline = 1;
	    break;		/* can be inlined */
	  }
      }
    else
      {
	if (size >= inlineflag)
	  {
	    can_inline = 1;
	    break;		/* can be inlined */
	  }
	size = 0;
      }
  if (size > inlineflag)
    can_inline = 1;

  if (can_inline == 0)
    {			/* can not inline, drop back to old mode */
      for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
	print_stat (1, &dl->decl);
      return;
    };

  flag = PUT;
  for (j = 0; j < 2; j++)
    {
      inline_struct (def, flag);
      if (flag == PUT)
	flag = GET;
    }

  f_print (fout, "\t return TRUE;\n\t}\n\n");

  /* now take care of XDR_FREE case */

  for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
    print_stat (1, &dl->decl);
}

static void
emit_typedef (const definition * def)
{
  const char *prefix = def->def.ty.old_prefix;
  const char *type = def->def.ty.old_type;
  const char *amax = def->def.ty.array_max;
  relation rel = def->def.ty.rel;

  print_ifstat (1, prefix, type, rel, amax, "objp", def->def_name);
}

static void
print_stat (int indent, const declaration * dec)
{
  const char *prefix = dec->prefix;
  const char *type = dec->type;
  const char *amax = dec->array_max;
  relation rel = dec->rel;
  char name[256];

  if (isvectordef (type, rel))
    {
      s_print (name, "objp->%s", dec->name);
    }
  else
    {
      s_print (name, "&objp->%s", dec->name);
    }
  print_ifstat (indent, prefix, type, rel, amax, name, dec->name);
}


static void
emit_inline (int indent, declaration * decl, int flag)
{
  switch (decl->rel)
    {
    case REL_ALIAS:
      emit_single_in_line (indent, decl, flag, REL_ALIAS);
      break;
    case REL_VECTOR:
      tabify (fout, indent);
      f_print (fout, "{\n");
      tabify (fout, indent + 1);
      f_print (fout, "register %s *genp;\n\n", decl->type);
      tabify (fout, indent + 1);
      f_print (fout,
	      "for (i = 0, genp = objp->%s;\n", decl->name);
      tabify (fout, indent + 2);
      f_print (fout, "i < %s; ++i) {\n", decl->array_max);
      emit_single_in_line (indent + 2, decl, flag, REL_VECTOR);
      tabify (fout, indent + 1);
      f_print (fout, "}\n");
      tabify (fout, indent);
      f_print (fout, "}\n");
      break;
    default:
      /* ?... do nothing I guess */
    }
}

static void
emit_single_in_line (int indent, declaration *decl, int flag, relation rel)
{
  char *upp_case;
  int freed = 0;

  tabify (fout, indent);
  if (flag == PUT)
    f_print (fout, "IXDR_PUT_");
  else
    {
      if (rel == REL_ALIAS)
	f_print (fout, "objp->%s = IXDR_GET_", decl->name);
      else
	f_print (fout, "*genp++ = IXDR_GET_");
    }

  upp_case = upcase (decl->type);

  /* hack  - XX */
  if (!strcmp (upp_case, "INT"))
    {
      free (upp_case);
      freed = 1;
      upp_case = "LONG";
    }

  if (!strcmp (upp_case, "U_INT"))
    {
      free (upp_case);
      freed = 1;
      upp_case = "U_LONG";
    }

  if (flag == PUT)
    {
      if (rel == REL_ALIAS)
	f_print (fout, "%s(buf, objp->%s);\n", upp_case, decl->name);
      else
	f_print (fout, "%s(buf, *genp++);\n", upp_case);
    }
  else
    {
      f_print (fout, "%s(buf);\n", upp_case);
    }

  if (!freed)
    free (upp_case);
}


static char *
upcase (const char *str)
{
  char *ptr, *hptr;
  ptr = malloc (strlen (str));
  if (ptr == NULL)
    {
      f_print (stderr, "malloc failed\n");
      exit (1);
    }
  hptr = ptr;
  while (*str != '\0')
    *ptr++ = toupper (*str++);

  *ptr = '\0';
  return hptr;
}