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448 lines
13 KiB
C
448 lines
13 KiB
C
/* Copyright (C) 1995, 1996, 1998, 1999, 2000 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
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gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
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#include <stdio.h>
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#include "libguile/_scm.h"
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#include "libguile/objects.h"
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#include "libguile/ports.h"
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#include "libguile/smob.h"
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/* scm_smobs scm_numsmob
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* implement a dynamicly resized array of smob records.
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* Indexes into this table are used when generating type
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* tags for smobjects (if you know a tag you can get an index and conversely).
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*/
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int scm_numsmob;
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scm_smob_descriptor *scm_smobs;
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/* {Mark}
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*/
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/* This function is vestigial. It used to be the mark function's
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responsibility to set the mark bit on the smob or port, but now the
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generic marking routine in gc.c takes care of that, and a zero
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pointer for a mark function means "don't bother". So you never
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need scm_mark0.
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However, we leave it here because it's harmless to call it, and
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people out there have smob code that uses it, and there's no reason
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to make their links fail. */
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SCM
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scm_mark0 (SCM ptr)
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{
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return SCM_BOOL_F;
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}
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SCM
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scm_markcdr (SCM ptr)
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{
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return SCM_CDR (ptr);
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}
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/* {Free}
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*/
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scm_sizet
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scm_free0 (SCM ptr)
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{
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return 0;
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}
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scm_sizet
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scm_smob_free (SCM obj)
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{
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scm_must_free ((char *) SCM_CELL_WORD_1 (obj));
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return scm_smobs[SCM_SMOBNUM (obj)].size;
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}
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/* {Print}
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*/
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int
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scm_smob_print (SCM exp, SCM port, scm_print_state *pstate)
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{
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int n = SCM_SMOBNUM (exp);
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scm_puts ("#<", port);
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scm_puts (SCM_SMOBNAME (n) ? SCM_SMOBNAME (n) : "smob", port);
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scm_putc (' ', port);
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scm_intprint (SCM_UNPACK (scm_smobs[n].size ? SCM_CDR (exp) : exp), 16, port);
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scm_putc ('>', port);
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return 1;
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}
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/* {Apply}
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*/
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/*
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* A possible future optimization:
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*
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* Let's call each of the forms of call below a "trampoline".
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*
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* We could make a function out of each trampoline and store four
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* pointers to trampolines in the descriptor, one corresponding to
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* each arity of call (apply_0, apply_1 etc.)
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*
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* Which trampoline to store in which field is chosen in scm_set_smob_apply.
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*/
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SCM
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scm_smob_apply_0 (SCM smob)
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{
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int type = SCM_SMOB_DESCRIPTOR (smob).gsubr_type;
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switch (type)
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{
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case SCM_GSUBR_MAKTYPE (0, 0, 0):
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return SCM_SMOB_DESCRIPTOR (smob).apply ();
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case SCM_GSUBR_MAKTYPE (0, 1, 0):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, SCM_UNDEFINED);
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case SCM_GSUBR_MAKTYPE (0, 0, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, SCM_EOL);
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case SCM_GSUBR_MAKTYPE (0, 2, 0):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob,
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SCM_UNDEFINED,
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SCM_UNDEFINED);
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case SCM_GSUBR_MAKTYPE (0, 1, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob,
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SCM_UNDEFINED,
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SCM_EOL);
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case SCM_GSUBR_MAKTYPE (0, 3, 0):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob,
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SCM_UNDEFINED,
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SCM_UNDEFINED,
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SCM_UNDEFINED);
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case SCM_GSUBR_MAKTYPE (0, 2, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob,
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SCM_UNDEFINED,
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SCM_UNDEFINED,
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SCM_EOL);
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default:
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if (SCM_GSUBR_REQ (type) > 0)
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scm_wrong_num_args (smob);
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scm_misc_error ("scm_smob_apply_0",
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"Unsupported smob application: ~S",
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SCM_LIST1 (smob));
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}
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}
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SCM
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scm_smob_apply_1 (SCM smob, SCM a1)
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{
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int type = SCM_SMOB_DESCRIPTOR (smob).gsubr_type;
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switch (type)
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{
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case SCM_GSUBR_MAKTYPE (0, 0, 0):
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scm_wrong_num_args (smob);
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case SCM_GSUBR_MAKTYPE (1, 0, 0):
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case SCM_GSUBR_MAKTYPE (0, 1, 0):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1);
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case SCM_GSUBR_MAKTYPE (0, 0, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, SCM_LIST1 (a1));
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case SCM_GSUBR_MAKTYPE (1, 1, 0):
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case SCM_GSUBR_MAKTYPE (0, 2, 0):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1, SCM_UNDEFINED);
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case SCM_GSUBR_MAKTYPE (1, 0, 1):
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case SCM_GSUBR_MAKTYPE (0, 1, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1, SCM_EOL);
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case SCM_GSUBR_MAKTYPE (1, 2, 0):
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case SCM_GSUBR_MAKTYPE (0, 3, 0):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1,
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SCM_UNDEFINED,
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SCM_UNDEFINED);
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case SCM_GSUBR_MAKTYPE (1, 1, 1):
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case SCM_GSUBR_MAKTYPE (0, 2, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1,
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SCM_UNDEFINED,
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SCM_EOL);
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default:
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if (SCM_GSUBR_REQ (type) > 1)
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scm_wrong_num_args (smob);
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scm_misc_error ("scm_smob_apply_1",
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"Unsupported smob application: ~S",
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SCM_LIST1 (smob));
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}
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}
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SCM
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scm_smob_apply_2 (SCM smob, SCM a1, SCM a2)
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{
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int type = SCM_SMOB_DESCRIPTOR (smob).gsubr_type;
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switch (type)
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{
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case SCM_GSUBR_MAKTYPE (0, 0, 0):
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case SCM_GSUBR_MAKTYPE (1, 0, 0):
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case SCM_GSUBR_MAKTYPE (0, 1, 0):
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scm_wrong_num_args (smob);
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case SCM_GSUBR_MAKTYPE (0, 0, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, SCM_LIST2 (a1, a2));
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case SCM_GSUBR_MAKTYPE (2, 0, 0):
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case SCM_GSUBR_MAKTYPE (1, 1, 0):
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case SCM_GSUBR_MAKTYPE (0, 2, 0):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1, a2);
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case SCM_GSUBR_MAKTYPE (1, 0, 1):
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case SCM_GSUBR_MAKTYPE (0, 1, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1, SCM_LIST1 (a2));
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case SCM_GSUBR_MAKTYPE (2, 1, 0):
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case SCM_GSUBR_MAKTYPE (1, 2, 0):
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case SCM_GSUBR_MAKTYPE (0, 3, 0):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1, a2, SCM_UNDEFINED);
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case SCM_GSUBR_MAKTYPE (2, 0, 1):
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case SCM_GSUBR_MAKTYPE (1, 1, 1):
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case SCM_GSUBR_MAKTYPE (0, 2, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1, a2, SCM_EOL);
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default:
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if (SCM_GSUBR_REQ (type) > 2)
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scm_wrong_num_args (smob);
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scm_misc_error ("scm_smob_apply_2",
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"Unsupported smob application: ~S",
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SCM_LIST1 (smob));
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}
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}
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SCM
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scm_smob_apply_3 (SCM smob, SCM a1, SCM a2, SCM rest)
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{
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int type = SCM_SMOB_DESCRIPTOR (smob).gsubr_type;
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switch (type)
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{
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case SCM_GSUBR_MAKTYPE (0, 0, 0):
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case SCM_GSUBR_MAKTYPE (1, 0, 0):
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case SCM_GSUBR_MAKTYPE (0, 1, 0):
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case SCM_GSUBR_MAKTYPE (2, 0, 0):
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case SCM_GSUBR_MAKTYPE (1, 1, 0):
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case SCM_GSUBR_MAKTYPE (0, 2, 0):
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scm_wrong_num_args (smob);
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case SCM_GSUBR_MAKTYPE (0, 0, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, scm_cons (a1, scm_cons (a2, rest)));
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case SCM_GSUBR_MAKTYPE (1, 0, 1):
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case SCM_GSUBR_MAKTYPE (0, 1, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1, scm_cons (a2, rest));
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case SCM_GSUBR_MAKTYPE (3, 0, 0):
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case SCM_GSUBR_MAKTYPE (2, 1, 0):
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case SCM_GSUBR_MAKTYPE (1, 2, 0):
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case SCM_GSUBR_MAKTYPE (0, 3, 0):
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if (!SCM_NULLP (SCM_CDR (rest)))
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scm_wrong_num_args (smob);
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1, a2, SCM_CAR (rest));
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case SCM_GSUBR_MAKTYPE (2, 0, 1):
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case SCM_GSUBR_MAKTYPE (1, 1, 1):
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case SCM_GSUBR_MAKTYPE (0, 2, 1):
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return SCM_SMOB_DESCRIPTOR (smob).apply (smob, a1, a2, rest);
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default:
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if (SCM_GSUBR_REQ (type) > 3)
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scm_wrong_num_args (smob);
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scm_misc_error ("scm_smob_apply_3",
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"Unsupported smob application: ~S",
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SCM_LIST1 (smob));
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}
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}
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long
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scm_make_smob_type (char *name, scm_sizet size)
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{
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char *tmp;
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if (255 <= scm_numsmob)
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goto smoberr;
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SCM_DEFER_INTS;
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SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_smobs,
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(1 + scm_numsmob)
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* sizeof (scm_smob_descriptor)));
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if (tmp)
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{
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scm_smobs = (scm_smob_descriptor *) tmp;
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scm_smobs[scm_numsmob].name = name;
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scm_smobs[scm_numsmob].size = size;
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scm_smobs[scm_numsmob].mark = 0;
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scm_smobs[scm_numsmob].free = (size == 0 ? scm_free0 : scm_smob_free);
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scm_smobs[scm_numsmob].print = scm_smob_print;
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scm_smobs[scm_numsmob].equalp = 0;
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scm_smobs[scm_numsmob].apply = 0;
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scm_smobs[scm_numsmob].gsubr_type = 0;
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scm_numsmob++;
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}
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SCM_ALLOW_INTS;
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if (!tmp)
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{
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smoberr:
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scm_memory_error ("scm_make_smob_type");
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}
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/* Make a class object if Goops is present. */
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if (scm_smob_class)
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scm_smob_class[scm_numsmob - 1]
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= scm_make_extended_class (SCM_SMOBNAME (scm_numsmob - 1));
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return scm_tc7_smob + (scm_numsmob - 1) * 256;
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}
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long
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scm_make_smob_type_mfpe (char *name, scm_sizet size,
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SCM (*mark) (SCM),
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scm_sizet (*free) (SCM),
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int (*print) (SCM, SCM, scm_print_state *),
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SCM (*equalp) (SCM, SCM))
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{
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long answer = scm_make_smob_type (name, size);
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scm_set_smob_mfpe (answer, mark, free, print, equalp);
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return answer;
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}
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void
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scm_set_smob_mark (long tc, SCM (*mark) (SCM))
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{
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scm_smobs[SCM_TC2SMOBNUM (tc)].mark = mark;
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}
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void
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scm_set_smob_free (long tc, scm_sizet (*free) (SCM))
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{
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scm_smobs[SCM_TC2SMOBNUM (tc)].free = free;
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}
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void
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scm_set_smob_print (long tc, int (*print) (SCM, SCM, scm_print_state*))
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{
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scm_smobs[SCM_TC2SMOBNUM (tc)].print = print;
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}
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void
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scm_set_smob_equalp (long tc, SCM (*equalp) (SCM, SCM))
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{
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scm_smobs[SCM_TC2SMOBNUM (tc)].equalp = equalp;
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}
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void
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scm_set_smob_apply (long tc, SCM (*apply) (), int req, int opt, int rst)
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{
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scm_smobs[SCM_TC2SMOBNUM (tc)].apply = apply;
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scm_smobs[SCM_TC2SMOBNUM (tc)].gsubr_type = SCM_GSUBR_MAKTYPE (req, opt, rst);
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}
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void
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scm_set_smob_mfpe (long tc,
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SCM (*mark) (SCM),
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scm_sizet (*free) (SCM),
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int (*print) (SCM, SCM, scm_print_state *),
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SCM (*equalp) (SCM, SCM))
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{
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if (mark) scm_set_smob_mark (tc, mark);
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if (free) scm_set_smob_free (tc, free);
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if (print) scm_set_smob_print (tc, print);
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if (equalp) scm_set_smob_equalp (tc, equalp);
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}
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SCM
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scm_make_smob (long tc)
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{
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int n = SCM_TC2SMOBNUM (tc);
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scm_sizet size = scm_smobs[n].size;
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SCM z;
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SCM_NEWCELL (z);
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if (size != 0)
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{
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#if 0
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SCM_ASSERT (scm_smobs[n].mark == 0,
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0,
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"forbidden operation for smobs with GC data, use SCM_NEWSMOB",
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SCM_SMOBNAME (n));
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#endif
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SCM_SET_SMOB_DATA (z, scm_must_malloc (size, SCM_SMOBNAME (n)));
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}
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SCM_SET_CELL_TYPE (z, tc);
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return z;
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}
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/* {Initialization for i/o types, float, bignum, the type of free cells}
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*/
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static int
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freeprint (SCM exp,
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SCM port,
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scm_print_state *pstate)
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{
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char buf[100];
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sprintf (buf, "#<freed cell %p; GC missed a reference>", (void *) SCM_UNPACK (exp));
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scm_puts (buf, port);
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return 1;
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}
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void
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scm_smob_prehistory ()
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{
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scm_numsmob = 0;
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scm_smobs = ((scm_smob_descriptor *)
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malloc (7 * sizeof (scm_smob_descriptor)));
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/* WARNING: These scm_make_smob_type calls must be done in this order */
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scm_make_smob_type_mfpe ("free", 0,
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NULL, NULL, freeprint, NULL);
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scm_make_smob_type_mfpe ("big", 0, /* freed in gc */
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NULL, NULL, scm_bigprint, scm_bigequal);
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scm_make_smob_type_mfpe ("real", 0, /* freed in gc */
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NULL, NULL, scm_print_real, scm_real_equalp);
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||
scm_make_smob_type_mfpe ("complex", 0, /* freed in gc */
|
||
NULL, NULL, scm_print_complex, scm_complex_equalp);
|
||
}
|
||
|
||
/*
|
||
Local Variables:
|
||
c-file-style: "gnu"
|
||
End:
|
||
*/
|