/* Tree-dumping functionality for intermediate representation.
   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
   Written by Mark Mitchell <mark@codesourcery.com>

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Flags used with queue functions.  */
#define DUMP_NONE     0
#define DUMP_BINFO    1

/* Information about a node to be dumped.  */

typedef struct dump_node_info
{
  /* The index for the node.  */
  unsigned int index;
  /* Nonzero if the node is a binfo.  */
  unsigned int binfo_p : 1;
} *dump_node_info_p;

/* A dump_queue is a link in the queue of things to be dumped.  */

typedef struct dump_queue
{
  /* The queued tree node.  */
  splay_tree_node node;
  /* The next node in the queue.  */
  struct dump_queue *next;
} *dump_queue_p;

/* A dump_info gives information about how we should perform the dump 
   and about the current state of the dump.  */

struct dump_info
{
  /* The stream on which to dump the information.  */
  FILE *stream;
  /* The next unused node index.  */
  unsigned int index;
  /* The next column.  */
  unsigned int column;
  /* The first node in the queue of nodes to be written out.  */
  dump_queue_p queue;
  /* The last node in the queue.  */
  dump_queue_p queue_end;
  /* Free queue nodes.  */
  dump_queue_p free_list;
  /* The tree nodes which we have already written out.  The 
     keys are the addresses of the nodes; the values are the integer
     indices we assigned them.  */
  splay_tree nodes;
};

/* Dump the CHILD and its children.  */
#define dump_child(field, child) \
  queue_and_dump_index (di, field, child, DUMP_NONE)

extern void dump_int 
  PARAMS ((dump_info_p, const char *, int));
extern void dump_string 
  PARAMS ((dump_info_p, const char *));
extern void dump_stmt 
  PARAMS ((dump_info_p, tree));
extern void dump_next_stmt 
  PARAMS ((dump_info_p, tree));
extern void queue_and_dump_index 
  PARAMS ((dump_info_p, const char *, tree, int));
extern void queue_and_dump_type 
  PARAMS ((dump_info_p, tree));