libguile/procs.h

   1 /* classes: h_files */
   2
   3 #ifndef PROCSH
   4 #define PROCSH
   5 /*      Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this software; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA 02111-1307 USA
  21  *
  22  * As a special exception, the Free Software Foundation gives permission
  23  * for additional uses of the text contained in its release of GUILE.
  24  *
  25  * The exception is that, if you link the GUILE library with other files
  26  * to produce an executable, this does not by itself cause the
  27  * resulting executable to be covered by the GNU General Public License.
  28  * Your use of that executable is in no way restricted on account of
  29  * linking the GUILE library code into it.
  30  *
  31  * This exception does not however invalidate any other reasons why
  32  * the executable file might be covered by the GNU General Public License.
  33  *
  34  * This exception applies only to the code released by the
  35  * Free Software Foundation under the name GUILE.  If you copy
  36  * code from other Free Software Foundation releases into a copy of
  37  * GUILE, as the General Public License permits, the exception does
  38  * not apply to the code that you add in this way.  To avoid misleading
  39  * anyone as to the status of such modified files, you must delete
  40  * this exception notice from them.
  41  *
  42  * If you write modifications of your own for GUILE, it is your choice
  43  * whether to permit this exception to apply to your modifications.
  44  * If you do not wish that, delete this exception notice.  */
  45 \f
  46
  47 #include "libguile/__scm.h"
  48
  49 \f
  50
  51
  52 /* Subrs
  53  */
  54
  55 typedef struct scm_subr
  56 {
  57   long sname;
  58   SCM (*cproc) ();
  59 } scm_subr;
  60
  61 typedef struct scm_iproc
  62 {
  63   char *scm_string;
  64   SCM (*cproc) ();
  65 } scm_iproc;
  66
  67 typedef struct scm_dsubr
  68 {
  69   long sname;
  70   double (*dproc) ();
  71 } scm_dsubr;
  72
  73 #define SCM_SNAME(x) ((SCM_CAR(x)>>8)?(SCM)(scm_heap_org+(SCM_CAR(x)>>8)):scm_nullstr)
  74 #define SCM_SUBRF(x) (((scm_subr *)(SCM2PTR(x)))->cproc)
  75 #define SCM_DSUBRF(x) (((scm_dsubr *)(SCM2PTR(x)))->dproc)
  76 #define SCM_CCLO_SUBR(x) (SCM_VELTS(x)[0])
  77
  78 /* Closures
  79  */
  80
  81 #define SCM_CLOSUREP(x) (SCM_TYP3(x)==scm_tc3_closure)
  82 #define SCM_CLOSCAR(x) (SCM_CAR(x)-scm_tc3_closure)
  83 #define SCM_CODE(x) SCM_CAR(SCM_CLOSCAR (x))
  84 #define SCM_PROCPROPS(x) SCM_CDR(SCM_CLOSCAR (x))
  85 #define SCM_SETPROCPROPS(x, p) SCM_SETCDR(SCM_CLOSCAR (x), p)
  86 #define SCM_SETCODE(x, e) (SCM_SETCAR (x, scm_cons ((e), SCM_EOL) + scm_tc3_closure))
  87 #define SCM_ENV(x) SCM_CDR(x)
  88 #define SCM_SETENV(x, e) SCM_SETCDR (x, e)
  89 #define SCM_TOP_LEVEL(SCM_ENV)  (SCM_NULLP(SCM_ENV) || (SCM_BOOL_T == scm_procedure_p (SCM_CAR (SCM_ENV))))
  90
  91 \f
  92
  93 extern SCM scm_make_subr SCM_P ((char *name, int type, SCM (*fcn) ()));
  94 extern SCM scm_make_subr_opt SCM_P ((char *name, int type, SCM (*fcn) (),
  95                                      int set));
  96 extern SCM scm_makcclo SCM_P ((SCM proc, long len));
  97 extern SCM scm_procedure_p SCM_P ((SCM obj));
  98 extern SCM scm_closure_p SCM_P ((SCM obj));
  99 extern SCM scm_thunk_p SCM_P ((SCM obj));
 100 extern void scm_init_iprocs SCM_P ((scm_iproc *subra, int type));
 101 extern void scm_init_procs SCM_P ((void));
 102
 103 #ifdef GUILE_DEBUG
 104 extern SCM scm_make_cclo SCM_P ((SCM proc, SCM len));
 105 #endif /*GUILE_DEBUG*/
 106
 107 \f
 108 #endif  /* PROCSH */