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/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

/**********************************************************************

$Author: release $

$Date: 1998/01/17 15:55:46 $

$Revision: 1.1.1.1 $

$Log: mark_scope.c,v $

 * Revision 1.1.1.1  1998/01/17  15:55:46  release

 * First version to be checked into rolling release.

 *

 * Revision 1.8  1998/01/09  09:30:07  pwe

 * prep restructure

 *

 * Revision 1.7  1997/10/28  10:12:38  pwe

 * local location support

 *

 * Revision 1.6  1997/10/23  09:21:26  pwe

 * ANDF-DE V1.7 and extra diags

 *

 * Revision 1.5  1997/08/23  13:27:24  pwe

 * initial ANDF-DE

 *

 * Revision 1.4  1997/04/02  12:55:05  currie

 * includes before ifdef

 *

Revision 1.3  1997/03/20 17:04:53  currie

Dwarf2 diags

Revision 1.2  1997/02/18 12:55:52  currie

NEW DIAG STRUCTURE

 * Revision 1.1  1995/04/06  10:42:55  currie

 * Initial revision

 *

***********************************************************************/

#include "config.h"

#include "common_types.h"

#include "expmacs.h"

#include "tags.h"

#include "xalloc.h"

#include "externs.h"

#include "dg_aux.h"

#include "mark_scope.h"

#ifdef NEWDIAGS

int doing_mark_scope = 0;

void mark_scope

    PROTO_N ( (e) )

    PROTO_T ( exp e )

{

	/* called by read_diag_id_scope; dgf(e) holds DIAG_INFO_ID */

  dg_info d = dgf(e);

  dg_info * ptr;

  exp id;

  if (!d || d->key != DGA_NAME || d->data.i_nam.dnam->key != DGN_OBJECT)

    return;

  id = son(d->data.i_nam.dnam->data.n_obj.obtain_val);

  if (name(id) == cont_tag)

    id = son(id);

  if (name(id) != name_tag)

    return;

  id = son(id);

  if (isparam(id))

    return;

  ptr = &(d->more);

  d = nildiag;

  while (*ptr && (*ptr)->key != DGA_SCOPE)

    ptr = &((*ptr)->more);

  if (!*ptr && name(e) == seq_tag && name(son(son(e))) == ass_tag

		&& last(son(son(e))) && name(bro(son(e))) != ident_tag ) {

    ptr = &dgf(bro(son(e)));

    while (*ptr && (*ptr)->key != DGA_SCOPE)

      ptr = &((*ptr)->more);

  }

  if (*ptr) {

    d = *ptr;

    *ptr = d->more;

  }

  else {

    d = f_lexical_block_dg (no_dg_idname_option, no_dg_sourcepos_option);

    d->data.i_scope.begin_st = (long)(-1);

    doing_mark_scope = 1;

  }

  /* if (isglob(id)) */ {

    d->more = dgf(e);

    dgf(e) = d;

  }

#if 0

  else {

    exp def = son(id);

    if (dgf(def) && dgf(def)->key == DGA_SRC)

      dgf(e)->data.i_nam.dnam->whence = dgf(def)->data.i_src.startpos;

    d->more = dgf(id);

    dgf(id) = d;

  }

#endif

  return;

}

void mark_scope2

    PROTO_N ( (e) )

    PROTO_T ( exp e )

{

	/* called by read_diag_type_scope; dgf(e) holds DIAG_INFO_ID */

  dg_info d = dgf(e);

  dg_info * ptr;

  if (!d || d->key != DGA_NAME || d->data.i_nam.dnam->key != DGN_TYPE)

    return;

  ptr = &(d->more);

  d = nildiag;

  while (*ptr && (*ptr)->key != DGA_SCOPE)

    ptr = &((*ptr)->more);

  if (*ptr) {

    d = *ptr;

    *ptr = d->more;

  }

  else {

    d = f_lexical_block_dg (no_dg_idname_option, no_dg_sourcepos_option);

    d->data.i_scope.begin_st = (long)(-1);

    doing_mark_scope = 1;

  }

  d->more = dgf(e);

  dgf(e) = d;

  return;

}

void correct_mark_scope

    PROTO_N ( (e) )

    PROTO_T ( exp e )

{

  dg_info d = nildiag;

  dg_info * ptr = &(dgf(bro(son(e))));

  while (*ptr && (*ptr)->key != DGA_SCOPE)

    ptr = &((*ptr)->more);

  if (*ptr) {

    d = *ptr;

    *ptr = d->more;

  }

  if (d) {

    d->more = dgf(e);

    dgf(e) = d;

  }

  return;

}

#else

/* PROCEDURES */

static exp previous_scope

    PROTO_N ( (e) )

    PROTO_T ( exp e )

{

  if (!last(e) || bro(e) == nilexp)

    return nilexp;

  if (name(bro(e)) == diagnose_tag && (props(bro(e)) & 0x7) == 1)

    return previous_scope(bro(e));

  if (name(bro(e)) == diagnose_tag)

    return bro(e);

  if (name(bro(e)) == ident_tag && last(bro(e)))

   {

     if (bro(bro(e)) == nilexp)

       return nilexp;

     if (name(bro(bro(e))) == diagnose_tag &&

           (props(bro(bro(e))) & 0x7) == 1)

       return previous_scope(bro(bro(e)));

     if (name(bro(bro(e))) == diagnose_tag)

       return bro(bro(e));

     return nilexp;

   };

  return nilexp;

}

static int param_scope

    PROTO_N ( (e) )

    PROTO_T ( exp e )

{

  diag_info * d = dno(e);

  if (d -> key == DIAG_INFO_ID)

    return isparam(son(d -> data.id_scope.access));

  return 0;

}

static int needs_hiding

    PROTO_N ( (a, b) )

    PROTO_T ( exp a X exp b )

{

  diag_info * da = dno(a);

  diag_info * db = dno(b);

  if (da -> key != db -> key)

    return 0;

  switch (da -> key)

    {

      case DIAG_INFO_ID:

         return !strcmp(da -> data.id_scope.nme.ints.chars,

                        db -> data.id_scope.nme.ints.chars);

      case DIAG_INFO_TYPE:

         return !strcmp(da -> data.type_scope.nme.ints.chars,

                        db -> data.type_scope.nme.ints.chars);

      case DIAG_INFO_TAG:

         return !strcmp(da -> data.tag_scope.nme.ints.chars,

                        db -> data.tag_scope.nme.ints.chars);

      default: return 0;

    };

}

void mark_scope

    PROTO_N ( (e) )

    PROTO_T ( exp e )

{

  exp scope = e;

  if (param_scope(e))

     return;

  while (1)

   {

      scope = previous_scope(scope);

      if (scope == nilexp || param_scope(scope) ||

             needs_hiding(e, scope))

       {

         props(e) = (prop)(props(e) | 0x80);

         return;

       };

      if (props(scope) & 0x80)

         return;

   };

}

#endif