/* Interface definitions for Fortran symbol manager
   Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   Contributed by James Craig Burley (burley@gnu.ai.mit.edu).

This file is part of GNU Fortran.

GNU Fortran 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 Fortran 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 Fortran; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.  */

#ifndef _H_f_symbol
#define _H_f_symbol

/* The main symbol type.  */

typedef struct _ffesymbol_ *ffesymbol;

/* State of understanding about what the symbol represents.  */

enum _ffesymbol_state_
  {
/* See ffesymbol_state_is_exec() macro below when making changes.  */
    FFESYMBOL_stateNONE,	/* Never before seen. */
    FFESYMBOL_stateSEEN,	/* Seen before exec transition and not yet
				   understood (info not filled in, etc). */
    FFESYMBOL_stateUNCERTAIN,	/* Almost understood (info partly filled in). */
    FFESYMBOL_stateUNDERSTOOD,	/* Fully understood (info filled in). */
    FFESYMBOL_state
  };
typedef enum _ffesymbol_state_ ffesymbolState;
#define ffesymbolState_f ""

/* Attributes.  Symbols acquire attributes while their state is SEEN.
   These attributes are basically ignored once the symbol becomes
   UNDERSTOOD.  */

typedef long int ffesymbolAttrs;/* Holds set of attributes. */
#define ffesymbolAttrs_f "l"

enum _ffesymbol_attr_
  {
#define DEFATTR(ATTR,ATTRS,NAME) ATTR,
#include "symbol.def"
#undef DEFATTR
    FFESYMBOL_attr
  };				/* A given attribute. */
typedef enum _ffesymbol_attr_ ffesymbolAttr;
#define ffesymbolAttr_f ""

#define FFESYMBOL_attrsetNONE 0
#define FFESYMBOL_attrsetALL (((ffesymbolAttrs) 1 << FFESYMBOL_attr) - 1)

/* This is just for avoiding complaining about, e.g., "I = IABS(3)", that
   IABS doesn't meet the requirements for a user-defined symbol name as
   a result of, say, --symbol-case-lower, if IABS turns out to indeed be
   a reference to the intrinsic IABS (in which case it's a Fortran keyword
   like CALL) and not a user-defined name.  */

enum _ffesymbol_checkstate_
  {
    FFESYMBOL_checkstateNONE_,	/* Not checked/never necessary to check. */
    FFESYMBOL_checkstateINHIBITED_,	/* Bad name, but inhibited. */
    FFESYMBOL_checkstatePENDING_,	/* Bad name, might be intrinsic. */
    FFESYMBOL_checkstateCHECKED_,	/* Ok name, intrinsic, or bad name
					   reported. */
    FFESYMBOL_checkstate_
  };
typedef enum _ffesymbol_checkstate_ ffesymbolCheckState_;
#define ffesymbolCheckState_f_ ""

#include "bld.h"
#include "com.h"
#include "equiv.h"
#include "global.h"
#include "info.h"
#include "intrin.h"
#include "lex.h"
#include "malloc.h"
#include "name.h"
#include "storag.h"
#include "target.h"
#include "top.h"
#include "where.h"

struct _ffesymbol_
  {
    ffename name;
    ffename other_space_name;	/* For dual-space objects. */
    ffeglobal global;		/* In filewide name space. */
    ffesymbolAttrs attrs;	/* What kind of symbol am I? */
    ffesymbolState state;	/* What state am I in? */
    ffeinfo info;		/* Info filled in when _stateUNDERSTOOD. */
    ffebld dims;		/* Dimension list expression. */
    ffebld extents;		/* Extents list expression. */
    ffebld dim_syms;		/* List of SYMTERs of all symbols in dims. */
    ffebld array_size;		/* Size as an expression involving some of
				   dims. */
    ffebld init;		/* Initialization expression or expr list or
				   PARAMETER value. */
    ffebld accretion;		/* Initializations seen so far for
				   array/substr. */
    ffetargetOffset accretes;	/* # inits needed to fill entire array. */
    ffebld dummy_args;		/* For functions, subroutines, and entry
				   points. */
    ffebld namelist;		/* List of symbols in NML. */
    ffebld common_list;		/* List of entities in BCB/NCB. */
    ffebld sfunc_expr;		/* SFN's expression. */
    ffebldListBottom list_bottom;	/* For BCB, NCB, NML. */
    ffesymbol common;		/* Who is my containing COMMON area? */
    ffeequiv equiv;		/* Who have I been equivalenced with? */
    ffestorag storage;		/* Where am I in relation to my outside
				   world? */
#ifdef FFECOM_symbolHOOK
    ffecomSymbol hook;		/* Whatever the compiler/backend wants! */
#endif
    ffesymbol sfa_dummy_parent;	/* "X" outside sfunc "CIRC(X) = 3.14 * X". */
    ffesymbol func_result;	/* FUN sym's corresponding RES sym, & vice
				   versa. */
    ffetargetIntegerDefault value;	/* IMMEDIATE (DATA impdo) value. */
    ffesymbolCheckState_ check_state;	/* Valid name? */
    ffelexToken check_token;	/* checkstatePENDING_ only. */
    int max_entry_num;		/* For detecting dummy arg listed twice/IMPDO
				   iterator nesting violation; also for id of
				   sfunc dummy arg. */
    int num_entries;		/* Number of entry points in which this
				   symbol appears as a dummy arg; helps
				   determine whether arg might not be passed,
				   for example.  */
    ffeintrinGen generic;	/* Generic intrinsic id, if any. */
    ffeintrinSpec specific;	/* Specific intrinsic id, if any. */
    ffeintrinImp implementation;/* Implementation id, if any. */
    bool is_save;		/* SAVE flag set for this symbol (see also
				   ffe_is_saveall()). */
    bool is_init;		/* INIT flag set for this symbol. */
    bool do_iter;		/* Is currently a DO-loop iter (can't be
				   changed in loop). */
    bool reported;		/* (Debug) TRUE if the latest version has
				   been reported. */
    bool have_old;		/* TRUE if old copy of this symbol saved
				   away. */
    bool explicit_where;	/* TRUE if INTRINSIC/EXTERNAL explicit. */
    bool namelisted;		/* TRUE if in NAMELIST (needs static alloc). */
  };

#define ffesymbol_accretes(s) ((s)->accretes)
#define ffesymbol_accretion(s) ((s)->accretion)
#define ffesymbol_arraysize(s) ((s)->array_size)
#define ffesymbol_attr(s,a) ((s)->attrs & ((ffesymbolAttrs) 1 << (a)))
#define ffesymbol_attrs(s) ((s)->attrs)
char *ffesymbol_attrs_string (ffesymbolAttrs attrs);
#define ffesymbol_basictype(s) ffeinfo_basictype((s)->info)
void ffesymbol_check (ffesymbol s, ffelexToken t, bool maybe_intrin);
#define ffesymbol_common(s) ((s)->common)
#define ffesymbol_commonlist(s) ((s)->common_list)
ffesymbol ffesymbol_declare_blockdataunit (ffelexToken t, ffewhereLine wl,
					   ffewhereColumn wc);
ffesymbol ffesymbol_declare_cblock (ffelexToken t, ffewhereLine wl,
				    ffewhereColumn wc);
ffesymbol ffesymbol_declare_funcnotresunit (ffelexToken t);
ffesymbol ffesymbol_declare_funcresult (ffelexToken t);
ffesymbol ffesymbol_declare_funcunit (ffelexToken t);
ffesymbol ffesymbol_declare_local (ffelexToken t, bool maybe_intrin);
ffesymbol ffesymbol_declare_programunit (ffelexToken t, ffewhereLine wl,
					 ffewhereColumn wc);
ffesymbol ffesymbol_declare_sfdummy (ffelexToken t);
ffesymbol ffesymbol_declare_subrunit (ffelexToken t);
#define ffesymbol_dims(s) ((s)->dims)
#define ffesymbol_dim_syms(s) ((s)->dim_syms)
void ffesymbol_drive (ffesymbol (*fn) ());
void ffesymbol_drive_sfnames (ffesymbol (*fn) ());
#define ffesymbol_dummyargs(s) ((s)->dummy_args)
void ffesymbol_dump (ffesymbol s);
void ffesymbol_error (ffesymbol s, ffelexToken t);
#define ffesymbol_equiv(s) ((s)->equiv)
#define ffesymbol_explicitwhere(s) ((s)->explicit_where)
#define ffesymbol_extents(s) ((s)->extents)
#define ffesymbol_first_token(s) ((s)->name == NULL ? NULL  \
      : ffename_first_token((s)->name))
#define ffesymbol_funcresult(s) ((s)->func_result)
#define ffesymbol_generic(s) ((s)->generic)
#define ffesymbol_global(s) ((s)->global)
#define ffesymbol_hook(s) ((s)->hook)
#define ffesymbol_implementation(s) ((s)->implementation)
#define ffesymbol_info(s) ((s)->info)
#define ffesymbol_init(s) ((s)->init)
void ffesymbol_init_0 (void);
void ffesymbol_init_1 (void);
void ffesymbol_init_2 (void);
void ffesymbol_init_3 (void);
void ffesymbol_init_4 (void);
#define ffesymbol_is_doiter(s) ((s)->do_iter)
#define ffesymbol_is_dualspace(s) ((s)->other_space_name != NULL)
#define ffesymbol_is_f2c(s) (ffe_is_f2c())
#define ffesymbol_is_init(s) ((s)->is_init)
#define ffesymbol_is_reported(s) ((s)->reported)
#define ffesymbol_is_save(s) ((s)->is_save)
#define ffesymbol_is_specable(s) ffesymbol_state_is_specable(s->state)
#define ffesymbol_kindtype(s) ffeinfo_kindtype((s)->info)
#define ffesymbol_kind(s) ffeinfo_kind((s)->info)
ffesymbol ffesymbol_lookup_local (ffelexToken t);
#define ffesymbol_maxentrynum(s) ((s)->max_entry_num)
#define ffesymbol_name(s) ((s)->name)
#define ffesymbol_namelist(s) ((s)->namelist)
#define ffesymbol_namelisted(s) ((s)->namelisted)
#define ffesymbol_numentries(s) ((s)->num_entries)
#define ffesymbol_ptr_to_commonlist(s) (&(s)->common_list)
#define ffesymbol_ptr_to_listbottom(s) (&(s)->list_bottom)
#define ffesymbol_ptr_to_namelist(s) (&(s)->namelist)
#define ffesymbol_rank(s) ffeinfo_rank((s)->info)
void ffesymbol_reference (ffesymbol s, ffelexToken t, bool explicit);
ffesymbol ffesymbol_report (ffesymbol s);
void ffesymbol_report_all (void);
void ffesymbol_resolve_intrin (ffesymbol s);
void ffesymbol_retract (bool retract);
bool ffesymbol_retractable (void);
#define ffesymbol_set_accretes(s,a) ((s)->accretes = (a))
#define ffesymbol_set_accretion(s,a) ((s)->accretion = (a))
#define ffesymbol_set_arraysize(s,a) ((s)->array_size = (a))
#define ffesymbol_set_attr(s,a) ((s)->attrs |= ((ffesymbolAttrs) 1 << (a)))
#define ffesymbol_set_attrs(s,a) ((s)->attrs = (a))
#define ffesymbol_set_common(s,c) ((s)->common = (c))
#define ffesymbol_set_commonlist(s,c) ((s)->common_list = (c))
#define ffesymbol_set_dims(s,d) ((s)->dims = (d))
#define ffesymbol_set_dim_syms(s,d) ((s)->dim_syms = (d))
#define ffesymbol_set_dummyargs(s,d) ((s)->dummy_args = (d))
#define ffesymbol_set_equiv(s,e) ((s)->equiv = (e))
#define ffesymbol_set_explicitwhere(s,e) ((s)->explicit_where = (e))
#define ffesymbol_set_extents(s,e) ((s)->extents = (e))
#define ffesymbol_set_funcresult(s,f) ((s)->func_result = (f))
#define ffesymbol_set_generic(s,g) ((s)->generic = (g))
#define ffesymbol_set_global(s,g) ((s)->global = (g))
#define ffesymbol_set_hook(s,h) ((s)->hook = (h))
#define ffesymbol_set_implementation(s,im) ((s)->implementation = (im))
#define ffesymbol_set_init(s,i) ((s)->init = (i))
#define ffesymbol_set_info(s,i) ((s)->info = (i))
#define ffesymbol_set_is_doiter(s,f) ((s)->do_iter = (f))
#define ffesymbol_set_is_init(s,in) ((s)->is_init = (in))
#define ffesymbol_set_is_save(s,sa) ((s)->is_save = (sa))
#define ffesymbol_set_maxentrynum(s,m) ((s)->max_entry_num = (m))
#define ffesymbol_set_namelist(s,n) ((s)->namelist = (n))
#define ffesymbol_set_namelisted(s,n) ((s)->namelisted = (n))
#define ffesymbol_set_numentries(s,n) ((s)->num_entries = (n))
void ffesymbol_set_retractable (mallocPool pool);
#define ffesymbol_set_sfexpr(s,e) ((s)->sfunc_expr = (e))
#define ffesymbol_set_specific(s,sp) ((s)->specific = (sp))
#define ffesymbol_set_state(s,st) ((s)->state = (st))
#define ffesymbol_set_storage(s,st) ((s)->storage = (st))
#define ffesymbol_set_value(s,v) ((s)->value = (v))
#define ffesymbol_sfdummyparent(s) ((s)->sfa_dummy_parent)
#define ffesymbol_sfexpr(s) ((s)->sfunc_expr)
void ffesymbol_signal_change (ffesymbol s);
#define ffesymbol_signal_unreported(s) ((s)->reported = FALSE)
#define ffesymbol_size(s) ffeinfo_size((s)->info)
#define ffesymbol_specific(s) ((s)->specific)
#define ffesymbol_state(s) ((s)->state)
#define ffesymbol_state_is_specable(s) ((s) <= FFESYMBOL_stateSEEN)
char *ffesymbol_state_string (ffesymbolState state);
#define ffesymbol_storage(s) ((s)->storage)
void ffesymbol_terminate_0 (void);
void ffesymbol_terminate_1 (void);
void ffesymbol_terminate_2 (void);
void ffesymbol_terminate_3 (void);
void ffesymbol_terminate_4 (void);
#define ffesymbol_text(s) (((s)->name == NULL) ? "<->" : ffename_text((s)->name))
void ffesymbol_update_init (ffesymbol s);
void ffesymbol_update_save (ffesymbol s);
#define ffesymbol_value(s) ((s)->value)
#define ffesymbol_where(s) ffeinfo_where((s)->info)
#define ffesymbol_where_column(s) (((s)->name == NULL)	\
      ? ffewhere_column_unknown() : ffename_where_column((s)->name))
#define ffesymbol_where_filename(s) \
      ffewhere_line_filename(ffesymbol_where_line(s))
#define ffesymbol_where_filelinenum(s) \
      ffewhere_line_filelinenum(ffesymbol_where_line(s))
#define ffesymbol_where_line(s) (((s)->name == NULL) ? ffewhere_line_unknown() \
      : ffename_where_line((s)->name))

#endif
