/* $Id: rpc_cout.c,v 1.3 1999/03/08 22:52:35 dm Exp $ */
/*
 * 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
 */

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

static int findtype (definition *, char *);
static int undefined (char *);
static void print_generic_header (char *, int);
static void print_header (definition *);
static void print_prog_header (proc_list *);
static void print_trailer (void);
static void print_ifopen (int, char *);
static void print_ifarg (char *);
static void print_ifsizeof (char *, char *);
static void print_ifclose (int);
static void print_ifstat (int, char *, char *, relation, char *, char *, char *);
static void emit_program (definition *);
static void emit_enum (definition *);
static void emit_union (definition *);
static void emit_struct (definition *);
static void emit_typedef (definition *);
static void print_stat (int, declaration *);

void emit_inline (declaration *, int);
void emit_single_in_line (declaration *, int, relation);

/*
 * 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 dont 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:
    break;
  }
  print_trailer ();
}

static int
findtype (definition * def, 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 (char *type)
{
  definition *def;

  def = (definition *) FINDVAL (defined, type, findtype);

  return (def == NULL);
}

static void
print_generic_header (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\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\n");
  }
}

static void
print_header (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 (doinline == 0)
    return;
  /* May cause lint to complain. but  ... */
  f_print (fout, "\t register int32_t *buf;\n\n");
}

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

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

static void
print_ifsizeof (char *prefix, char *type)
{
  if (streq (type, "bool")) {
    f_print (fout, ", sizeof(bool_t), (xdrproc_t)xdr_bool");
  }
  else {
    f_print (fout, ", sizeof(");
    if (undefined (type) && prefix) {
      f_print (fout, "%s ", prefix);
    }
    f_print (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");
  tabify (fout, indent);
  f_print (fout, " }\n");
}

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

  switch (rel) {
  case REL_POINTER:
    print_ifopen (indent, "pointer");
    print_ifarg ("(char **)");
    f_print (fout, "%s", objname);
    print_ifsizeof (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 (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 0
      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);
      }
#else
      if (*objname == '&') {
	/* Don't know what this does but it seems broken */
	f_print (fout, "%s.val, (u_int *)%s.len",
		 objname, objname);
      }
      else {
	f_print (fout, "&%s->val, (u_int *)&%s->len",
		 objname, objname);
      }
#endif
    }
    print_ifarg (amax);
    if (!alt) {
      print_ifsizeof (prefix, type);
    }
    break;
  case REL_ALIAS:
    print_ifopen (indent, type);
    print_ifarg (objname);
    break;
  }
  print_ifclose (indent);
}

/* ARGSUSED */
static void
emit_enum (definition * def)
{
  print_ifopen (1, "enum");
  print_ifarg ("(enum_t *)objp");
  print_ifclose (1);
}

static void
emit_program (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 (definition * def)
{
  declaration *dflt;
  case_list *cl;
  declaration *cs;
  char *object;
#if 1
  char *vecformat = "objp->RPC_UNION_NAME(%s).%s";
  char *format = "&objp->RPC_UNION_NAME(%s).%s";
#else
  char *vecformat = "objp->u.%s";
  char *format = "&objp->u.%s";
#endif

  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 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);
      }
#else
      if (isvectordef (cs->type, cs->rel))
	s_print (object, vecformat, cs->name);
      else
	s_print (object, format, cs->name);
#endif
      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 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);
      }
#else
      if (isvectordef (dflt->type, dflt->rel))
	s_print (object, vecformat, dflt->name);
      else
	s_print (object, format, dflt->name);
#endif

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

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

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


  if (doinline == 0) {
    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, "\t int i;\n");
      break;
    }
  size = 0;
  can_inline = 0;
  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 >= doinline) {
	can_inline = 1;
	break;			/* can be inlined */
      }
      size = 0;
    }
  if (size > doinline)
    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++) {

    if (flag == PUT)
      f_print (fout, "\n\t if (xdrs->x_op == XDR_ENCODE) {\n");
    else
      f_print (fout, "\n \t return (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 = (char *) 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 < doinline) {
	    /* don't expand into inline
	     * code if size < doinline */
	    while (cur != dl) {
	      print_stat (1, &cur->decl);
	      cur = cur->next;
	    }
	  }
	  else {
	    /* were already looking at a
	     * xdr_inlineable structure */
	    if (sizestr == NULL)
	      f_print (fout, "\t buf = (int32_t *)XDR_INLINE(xdrs,%d * BYTES_PER_XDR_UNIT);",
		       size);
	    else if (size == 0)
	      f_print (fout,
		       "\t buf = (int32_t *)XDR_INLINE(xdrs,%s * BYTES_PER_XDR_UNIT);",
		       sizestr);
	    else
	      f_print (fout,
		       "\t buf = (int32_t *)XDR_INLINE(xdrs,(%d + %s)* BYTES_PER_XDR_UNIT);",
		       size, sizestr);

	    f_print (fout, "\n\t   if (buf == NULL) {\n");

	    psav = cur;
	    while (cur != dl) {
	      print_stat (2, &cur->decl);
	      cur = cur->next;
	    }

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

	    cur = psav;
	    while (cur != dl) {
	      emit_inline (&cur->decl, flag);
	      cur = cur->next;
	    }

	    f_print (fout, "\t  }\n");
	  }
	}
	size = 0;
	i = 0;
	sizestr = NULL;
	print_stat (1, &dl->decl);
      }

    }
    if (i > 0) {
      if (sizestr == NULL && size < doinline) {
	/* don't expand into inline code if size <
	 * doinline */
	while (cur != dl) {
	  print_stat (1, &cur->decl);
	  cur = cur->next;
	}
      }
      else {

	/* were already looking at a xdr_inlineable
	 * structure */
	if (sizestr == NULL)
	  f_print (fout, "\t\tbuf = (int32_t *)XDR_INLINE(xdrs,%d * BYTES_PER_XDR_UNIT);",
		   size);
	else if (size == 0)
	  f_print (fout,
	   "\t\tbuf = (int32_t *)XDR_INLINE(xdrs,%s * BYTES_PER_XDR_UNIT);",
		   sizestr);
	else
	  f_print (fout,
		   "\t\tbuf = (int32_t *)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 (2, &cur->decl);
	  cur = cur->next;
	}
	f_print (fout, "\n\t  }\n\t  else {\n");

	cur = psav;
	while (cur != dl) {
	  emit_inline (&cur->decl, flag);
	  cur = cur->next;
	}

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

      }
    }
    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 (definition * def)
{
  char *prefix = def->def.ty.old_prefix;
  char *type = def->def.ty.old_type;
  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, declaration * dec)
{
  char *prefix = dec->prefix;
  char *type = dec->type;
  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);
}


char *upcase (char *);

void
emit_inline (declaration * decl, int flag)
{

/*check whether an array or not */

  switch (decl->rel) {
  case REL_ALIAS:
    emit_single_in_line (decl, flag, REL_ALIAS);
    break;
  case REL_VECTOR:
    f_print (fout, "\t\t{ register %s *genp; \n", decl->type);
    f_print (fout, "\t\t  for ( i = 0,genp=objp->%s;\n \t\t\ti < %s; i++){\n\t\t",
	     decl->name, decl->array_max);
    emit_single_in_line (decl, flag, REL_VECTOR);
    f_print (fout, "\t\t   }\n\t\t };\n");
  default:
    break;
  }
}

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



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

  upp_case = upcase (decl->type);

  /* hack  - XX */
  if (strcmp (upp_case, "INT") == 0) {
    free (upp_case);
    freed = 1;
    upp_case = "LONG";
  }
  if (strcmp (upp_case, "U_INT") == 0) {
    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);

}


char *
upcase (char *str)
{
  char *ptr, *hptr;


  ptr = (char *) malloc (strlen (str) + 1);
  if (ptr == (char *) NULL) {
    f_print (stderr, "malloc failed \n");
    exit (1);
  };

  hptr = ptr;
  while (*str != '\0')
    *ptr++ = toupper (*str++);

  *ptr = '\0';
  return (hptr);

}
