newgen_types.h

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/*
 
  $Id: newgen_types.h 1357 2016-03-02 08:18:50Z coelho $
 
  Copyright 1989-2016 MINES ParisTech
 
  This file is part of NewGen.
 
  NewGen 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 3 of the License, or any later version.
 
  NewGen 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
  NewGen.  If not, see <http://www.gnu.org/licenses/>.
 
*/
 
#ifndef newgen_types_included
#define newgen_types_included
 
/*
 
  The implementation of the basic types UNIT, BOOL, TAG and STRING. The
  others CHAR, INT and FLOAT are provided by C.
 
*/
 
 
/* STRING
 */
#ifdef string
#undef string
#endif
typedef char *string ;
#define string_undefined ((string)-15)
#define string_undefined_p(s) ((s)==string_undefined)
#define copy_string(s) strdup(s)
 
/* _INT
 */
#ifndef _int_undefined
/* RK wants an "int" which is the size of a "pointer".
 * However, the use of the relevant "intptr_t" type in the code
 * amounts to source file defacing, hence this definition. FC.
 * The ifndef macro is to avoid a double definition if the type
 * needs to be defined in the C3/linear library as well.
 */
typedef intptr_t _int;
typedef uintptr_t _uint;
// also add corresponding format string
#include <inttypes.h>
#define _intFMT PRIuPTR
#define _uintFMT "u" PRIuPTR
#define _int_undefined ((_int)-15) /* SG: this is dangerous: a valid value is used to state an invalid value */
#define _int_undefined_p(i) ((i)==_int_undefined)
 
#endif /* _int_undefined */
 
/* BOOL
 */
 
/* SG: _Bool is not compatible with newgen because it does not permit the definition of an `undefined' state
   we use the int type for compatible behavior */
#ifndef BOOLEAN_INCLUDED /* similar to linear ... */
#define BOOLEAN_INCLUDED
 
#ifdef bool
    #error newgen header not compatible with stdbool.h
#endif
 
/* we cannot use an enum or stdbool because we need to be compatible with newgen,
 * thus boolean need to handle 3 states : true, false, and undefined  */
typedef int bool;
 
#define false 0
#define true 1
#endif
 
#define bool_undefined ((bool)-15) /* SG: this is a dangerous semantic: bool_undefined evaluates to true ... */
#define bool_undefined_p(b) ((b)==bool_undefined)
 
 
 
 
/* TAG
 */
typedef int tag;
#define tag_undefined (-3)
 
/* UNIT
 */
typedef int unit ;
#define UU ((void*)0)
#define UUINT(i) ((void*)(i))
 
/* ARRAY
 */
#define array_undefined NULL
#define array_undefined_p(a) ((a)==NULL)
 
typedef struct cons * list;
 
// functional types
typedef bool (*gen_filter_func_t)(const void *);
typedef bool (*gen_filter2_func_t)(const void *, const void *);
typedef string (*gen_string_func_t)(const void *);
// for qsort: void * points to a pointer to the newgen type
// so it is really "gen_chunk**", i.e. "entity*" or "statement*"
typedef int (*gen_cmp_func_t)(const void *, const void *);
typedef bool (*gen_eq_func_t)(const void *, const void *);
typedef void (*gen_iter_func_t)(void *);
 
/* Some CPP magics to get a line-number-dependent "unique" identifier to
   have list iteration variable with unique names and avoid conflicts if
   we have multiple FOREACH in the same statement block:
*/
// some magic is needed so that __LINE__ is really substituted with ##
#define NEWGEN_MACRO_NAME_1(prefix, x)   prefix##x
#define NEWGEN_MACRO_NAME_2(prefix, x)   NEWGEN_MACRO_NAME_1 (prefix, x)
// NGMID = NewGen Macro-generated IDitenfier
#define NGMID(f) NEWGEN_MACRO_NAME_2(_ ## f ## _, __LINE__)
 
// obsolete?
#ifdef __STRICT_ANSI__
#define GEN_PROTO(x) x
#else
#ifdef __STDC__
#define GEN_PROTO(x) x
#else
#define GEN_PROTO(x) ()
#endif /* __STDC__ */
#endif /* __STRICT_ANSI__ */
 
#endif /* newgen_types_included */