-/* classes: h_files */
-
-#ifndef PROCSH
-#define PROCSH
-/* Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
- *
- * This program 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.
- *
- * This program 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 this software; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 USA
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE. If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way. To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * If you write modifications of your own for GUILE, it is your choice
- * whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice. */
-\f
-
-#include "libguile/__scm.h"
-
-\f
-
-
-/* Subrs
- */
-
-typedef struct scm_subr
-{
- long sname;
- SCM (*cproc) ();
-} scm_subr;
-
-typedef struct scm_iproc
-{
- char *scm_string;
- SCM (*cproc) ();
-} scm_iproc;
-
-typedef struct scm_dsubr
-{
- long sname;
- double (*dproc) ();
-} scm_dsubr;
-
-#define SCM_SNAME(x) ((SCM_CAR(x)>>8)?(SCM)(scm_heap_org+(SCM_CAR(x)>>8)):scm_nullstr)
-#define SCM_SUBRF(x) (((scm_subr *)(SCM2PTR(x)))->cproc)
-#define SCM_DSUBRF(x) (((scm_dsubr *)(SCM2PTR(x)))->dproc)
-#define SCM_CCLO_SUBR(x) (SCM_VELTS(x)[0])
-
-/* Closures
- */
-
-#define SCM_CLOSUREP(x) (SCM_TYP3(x)==scm_tc3_closure)
-#define SCM_CLOSCAR(x) (SCM_CAR(x)-scm_tc3_closure)
-#define SCM_CODE(x) SCM_CAR(SCM_CLOSCAR (x))
-#define SCM_PROCPROPS(x) SCM_CDR(SCM_CLOSCAR (x))
-#define SCM_SETPROCPROPS(x, p) SCM_SETCDR(SCM_CLOSCAR (x), p)
-#define SCM_SETCODE(x, e) (SCM_SETCAR (x, scm_cons ((e), SCM_EOL) + scm_tc3_closure))
-#define SCM_ENV(x) SCM_CDR(x)
-#define SCM_SETENV(x, e) SCM_SETCDR (x, e)
-#define SCM_TOP_LEVEL(SCM_ENV) (SCM_NULLP(SCM_ENV) || (SCM_BOOL_T == scm_procedure_p (SCM_CAR (SCM_ENV))))
-
-/* Procedure-with-setter
-
- Four representations for procedure-with-setters were
- considered before selecting this one:
-
- 1. A closure where the CODE and ENV slots are used to represent
- the getter and a new SETTER slot is used for the setter. The
- original getter is stored as a `getter' procedure property. For
- closure getters, the CODE and ENV slots contains a copy of the
- getter's CODE and ENV slots. For subr getters, the CODE contains
- a call to the subr.
-
- 2. A compiled closure with a call to the getter in the cclo
- procedure. The getter and setter are stored in slots 1 and 2.
-
- 3. An entity (i.e. a struct with an associated procedure) with a
- call to the getter in the entity procedure and the setter stored
- in slot 0. The original getter is stored in slot 1.
-
- 4. A new primitive procedure type supported in the evaluator. The
- getter and setter are stored in a GETTER and SETTER slot. A call
- to this procedure type results in a retrieval of the getter and a
- jump back to the correct eval dispatcher.
-
- Representation 4 was selected because of efficiency and
- simplicity.
-
- Rep 1 has the advantage that there is zero penalty for closure
- getters, but primitive getters will get considerable overhead
- because the procedure-with-getter will be a closure which calls
- the getter.
-
- Rep 3 has the advantage that a GOOPS accessor can be a subclass of
- <procedure-with-setter>, but together with rep 2 it suffers from a
- three level dispatch for non-GOOPS getters:
-
- cclo/struct --> dispatch proc --> getter
-
- This is because the dispatch procedure must take an extra initial
- argument (cclo for rep 2, struct for rep 3).
-
- Rep 4 has the single disadvantage that it uses up one tc7 type
- code, but the plan for uniform vectors will very likely free tc7
- codes, so this is probably no big problem. Also note that the
- GETTER and SETTER slots can live directly on the heap, using the
- new four-word cells. */
-
-#define SCM_PROCEDURE_WITH_SETTER_P(obj) (SCM_TYP7 (obj) == scm_tc7_pws)
-#define SCM_PROCEDURE(obj) SCM_CADR (obj)
-#define SCM_SETTER(obj) SCM_CDDR (obj)
-
-\f
-
-extern SCM scm_make_subr SCM_P ((const char *name, int type, SCM (*fcn) ()));
-extern SCM scm_make_subr_opt SCM_P ((const char *name,
- int type,
- SCM (*fcn) (),
- int set));
-extern SCM scm_makcclo SCM_P ((SCM proc, long len));
-extern SCM scm_procedure_p SCM_P ((SCM obj));
-extern SCM scm_closure_p SCM_P ((SCM obj));
-extern SCM scm_thunk_p SCM_P ((SCM obj));
-extern SCM scm_procedure_documentation SCM_P ((SCM proc));
-extern SCM scm_procedure_with_setter_p SCM_P ((SCM obj));
-extern SCM scm_make_procedure_with_setter SCM_P ((SCM procedure, SCM setter));
-extern SCM scm_procedure SCM_P ((SCM proc));
-extern SCM scm_setter SCM_P ((SCM proc));
-extern void scm_init_iprocs SCM_P ((const scm_iproc *subra, int type));
-extern void scm_init_procs SCM_P ((void));
-
-#ifdef GUILE_DEBUG
-extern SCM scm_make_cclo SCM_P ((SCM proc, SCM len));
-#endif /*GUILE_DEBUG*/
-
-\f
-#endif /* PROCSH */
+/* classes: h_files */
+
+#ifndef SCM_PROCS_H
+#define SCM_PROCS_H
+
+/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2006, 2008, 2009 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+\f
+
+#include "libguile/__scm.h"
+
+\f
+
+SCM_API SCM scm_procedure_p (SCM obj);
+SCM_API SCM scm_thunk_p (SCM obj);
+SCM_API SCM scm_procedure_documentation (SCM proc);
+SCM_API SCM scm_procedure_with_setter_p (SCM obj);
+SCM_API SCM scm_make_procedure_with_setter (SCM procedure, SCM setter);
+SCM_API SCM scm_procedure (SCM proc);
+SCM_API SCM scm_setter (SCM proc);
+SCM_INTERNAL void scm_init_procs (void);
+
+#endif /* SCM_PROCS_H */
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff