-/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,1998,1999,2000,2001 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
* 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. */
+
+/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
+ gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
+
\f
#include <stdio.h>
-#include "_scm.h"
+#include <errno.h>
+
+#include "libguile/_scm.h"
-#include "smob.h"
+#include "libguile/objects.h"
+#include "libguile/ports.h"
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
+#include "libguile/smob.h"
+
\f
/* scm_smobs scm_numsmob
- * implement a dynamicly resized array of smob records.
+ * implement a fixed sized array of smob records.
* Indexes into this table are used when generating type
* tags for smobjects (if you know a tag you can get an index and conversely).
*/
-scm_sizet scm_numsmob;
-scm_smobfuns *scm_smobs;
+#define MAX_SMOB_COUNT 256
+scm_bits_t scm_numsmob;
+scm_smob_descriptor scm_smobs[MAX_SMOB_COUNT];
+
+/* {Mark}
+ */
+
+/* This function is vestigial. It used to be the mark function's
+ responsibility to set the mark bit on the smob or port, but now the
+ generic marking routine in gc.c takes care of that, and a zero
+ pointer for a mark function means "don't bother". So you never
+ need scm_mark0.
+
+ However, we leave it here because it's harmless to call it, and
+ people out there have smob code that uses it, and there's no reason
+ to make their links fail. */
+
+SCM
+scm_mark0 (SCM ptr)
+{
+ return SCM_BOOL_F;
+}
+
+SCM
+/* Dirk::FIXME: The name markcdr is misleading, since the term cdr should only
+ be used for real pairs. */
+scm_markcdr (SCM ptr)
+{
+ return SCM_CELL_OBJECT_1 (ptr);
+}
+
+/* {Free}
+ */
+
+size_t
+scm_free0 (SCM ptr)
+{
+ return 0;
+}
+
+size_t
+scm_smob_free (SCM obj)
+{
+ scm_must_free ((char *) SCM_CELL_WORD_1 (obj));
+ return scm_smobs[SCM_SMOBNUM (obj)].size;
+}
+
+/* {Print}
+ */
+
+int
+scm_smob_print (SCM exp, SCM port, scm_print_state *pstate)
+{
+ size_t n = SCM_SMOBNUM (exp);
+ scm_puts ("#<", port);
+ scm_puts (SCM_SMOBNAME (n) ? SCM_SMOBNAME (n) : "smob", port);
+ scm_putc (' ', port);
+ if (scm_smobs[n].size)
+ scm_intprint (SCM_CELL_WORD_1 (exp), 16, port);
+ else
+ scm_intprint (SCM_UNPACK (exp), 16, port);
+ scm_putc ('>', port);
+ return 1;
+}
+
+/* {Apply}
+ */
+
+#define SCM_SMOB_APPLY0(SMOB) \
+ SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB)
+#define SCM_SMOB_APPLY1(SMOB,A1) \
+ SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB, A1)
+#define SCM_SMOB_APPLY2(SMOB,A1,A2) \
+ SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB, A1, A2)
+#define SCM_SMOB_APPLY3(SMOB,A1,A2,A3) \
+ SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB, A1, A2, A3)
+
+static SCM
+scm_smob_apply_0_010 (SCM smob)
+{
+ return SCM_SMOB_APPLY1 (smob, SCM_UNDEFINED);
+}
+
+static SCM
+scm_smob_apply_0_020 (SCM smob)
+{
+ return SCM_SMOB_APPLY2 (smob, SCM_UNDEFINED, SCM_UNDEFINED);
+}
+
+static SCM
+scm_smob_apply_0_030 (SCM smob)
+{
+ return SCM_SMOB_APPLY3 (smob, SCM_UNDEFINED, SCM_UNDEFINED, SCM_UNDEFINED);
+}
+
+static SCM
+scm_smob_apply_0_001 (SCM smob)
+{
+ return SCM_SMOB_APPLY1 (smob, SCM_EOL);
+}
+
+static SCM
+scm_smob_apply_0_011 (SCM smob)
+{
+ return SCM_SMOB_APPLY2 (smob, SCM_UNDEFINED, SCM_EOL);
+}
+
+static SCM
+scm_smob_apply_0_021 (SCM smob)
+{
+ return SCM_SMOB_APPLY3 (smob, SCM_UNDEFINED, SCM_UNDEFINED, SCM_EOL);
+}
+
+static SCM
+scm_smob_apply_0_error (SCM smob)
+{
+ scm_wrong_num_args (smob);
+}
+
+static SCM
+scm_smob_apply_1_020 (SCM smob, SCM a1)
+{
+ return SCM_SMOB_APPLY2 (smob, a1, SCM_UNDEFINED);
+}
+
+static SCM
+scm_smob_apply_1_030 (SCM smob, SCM a1)
+{
+ return SCM_SMOB_APPLY3 (smob, a1, SCM_UNDEFINED, SCM_UNDEFINED);
+}
+
+static SCM
+scm_smob_apply_1_001 (SCM smob, SCM a1)
+{
+ return SCM_SMOB_APPLY1 (smob, SCM_LIST1 (a1));
+}
+
+static SCM
+scm_smob_apply_1_011 (SCM smob, SCM a1)
+{
+ return SCM_SMOB_APPLY2 (smob, a1, SCM_EOL);
+}
+
+static SCM
+scm_smob_apply_1_021 (SCM smob, SCM a1)
+{
+ return SCM_SMOB_APPLY3 (smob, a1, SCM_UNDEFINED, SCM_EOL);
+}
+
+static SCM
+scm_smob_apply_1_error (SCM smob, SCM a1)
+{
+ scm_wrong_num_args (smob);
+}
+
+static SCM
+scm_smob_apply_2_030 (SCM smob, SCM a1, SCM a2)
+{
+ return SCM_SMOB_APPLY3 (smob, a1, a2, SCM_UNDEFINED);
+}
+
+static SCM
+scm_smob_apply_2_001 (SCM smob, SCM a1, SCM a2)
+{
+ return SCM_SMOB_APPLY1 (smob, SCM_LIST2 (a1, a2));
+}
+
+static SCM
+scm_smob_apply_2_011 (SCM smob, SCM a1, SCM a2)
+{
+ return SCM_SMOB_APPLY2 (smob, a1, SCM_LIST1 (a2));
+}
+
+static SCM
+scm_smob_apply_2_021 (SCM smob, SCM a1, SCM a2)
+{
+ return SCM_SMOB_APPLY3 (smob, a1, a2, SCM_EOL);
+}
+
+static SCM
+scm_smob_apply_2_error (SCM smob, SCM a1, SCM a2)
+{
+ scm_wrong_num_args (smob);
+}
+
+static SCM
+scm_smob_apply_3_030 (SCM smob, SCM a1, SCM a2, SCM rst)
+{
+ if (!SCM_NULLP (SCM_CDR (rst)))
+ scm_wrong_num_args (smob);
+ return SCM_SMOB_APPLY3 (smob, a1, a2, SCM_CAR (rst));
+}
+
+static SCM
+scm_smob_apply_3_001 (SCM smob, SCM a1, SCM a2, SCM rst)
+{
+ return SCM_SMOB_APPLY1 (smob, scm_cons2 (a1, a2, rst));
+}
-long
-scm_newsmob (smob)
- scm_smobfuns *smob;
+static SCM
+scm_smob_apply_3_011 (SCM smob, SCM a1, SCM a2, SCM rst)
{
- char *tmp;
- if (255 <= scm_numsmob)
- goto smoberr;
- SCM_DEFER_INTS;
- SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_smobs, (1 + scm_numsmob) * sizeof (scm_smobfuns)));
- if (tmp)
+ return SCM_SMOB_APPLY2 (smob, a1, scm_cons (a2, rst));
+}
+
+static SCM
+scm_smob_apply_3_021 (SCM smob, SCM a1, SCM a2, SCM rst)
+{
+ return SCM_SMOB_APPLY3 (smob, a1, a2, rst);
+}
+
+static SCM
+scm_smob_apply_3_error (SCM smob, SCM a1, SCM a2, SCM rst)
+{
+ scm_wrong_num_args (smob);
+}
+
+\f
+
+scm_bits_t
+scm_make_smob_type (char *name, size_t size)
+#define FUNC_NAME "scm_make_smob_type"
+{
+ size_t new_smob;
+
+ SCM_ENTER_A_SECTION; /* scm_numsmob */
+ new_smob = scm_numsmob;
+ if (scm_numsmob != MAX_SMOB_COUNT)
+ ++scm_numsmob;
+ SCM_EXIT_A_SECTION;
+
+ if (new_smob == MAX_SMOB_COUNT)
+ scm_misc_error (FUNC_NAME, "maximum number of smobs exceeded", SCM_EOL);
+
+ scm_smobs[new_smob].name = name;
+ if (size != 0)
{
- scm_smobs = (scm_smobfuns *) tmp;
- scm_smobs[scm_numsmob].mark = smob->mark;
- scm_smobs[scm_numsmob].free = smob->free;
- scm_smobs[scm_numsmob].print = smob->print;
- scm_smobs[scm_numsmob].equalp = smob->equalp;
- scm_numsmob++;
+ scm_smobs[new_smob].size = size;
+ scm_smobs[new_smob].free = scm_smob_free;
}
- SCM_ALLOW_INTS;
- if (!tmp)
- smoberr:scm_wta (SCM_MAKINUM ((long) scm_numsmob), (char *) SCM_NALLOC, "newsmob");
- return scm_tc7_smob + (scm_numsmob - 1) * 256;
+
+ /* Make a class object if Goops is present. */
+ if (scm_smob_class)
+ scm_smob_class[new_smob] = scm_make_extended_class (name);
+
+ return scm_tc7_smob + new_smob * 256;
}
+#undef FUNC_NAME
-/* {Initialization for i/o types, float, bignum, the type of free cells}
- */
-static scm_smobfuns freecell =
+void
+scm_set_smob_mark (scm_bits_t tc, SCM (*mark) (SCM))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].mark = mark;
+}
+
+void
+scm_set_smob_free (scm_bits_t tc, size_t (*free) (SCM))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].free = free;
+}
+
+void
+scm_set_smob_print (scm_bits_t tc, int (*print) (SCM, SCM, scm_print_state*))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].print = print;
+}
+
+void
+scm_set_smob_equalp (scm_bits_t tc, SCM (*equalp) (SCM, SCM))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].equalp = equalp;
+}
+
+void
+scm_set_smob_apply (scm_bits_t tc, SCM (*apply) (),
+ unsigned int req, unsigned int opt, unsigned int rst)
+{
+ SCM (*apply_0) (SCM);
+ SCM (*apply_1) (SCM, SCM);
+ SCM (*apply_2) (SCM, SCM, SCM);
+ SCM (*apply_3) (SCM, SCM, SCM, SCM);
+ int type = SCM_GSUBR_MAKTYPE (req, opt, rst);
+
+ if (rst > 1 || req + opt + rst > 3)
+ {
+ puts ("Unsupported smob application type");
+ abort ();
+ }
+
+ switch (type)
+ {
+ case SCM_GSUBR_MAKTYPE (0, 0, 0):
+ apply_0 = apply; break;
+ case SCM_GSUBR_MAKTYPE (0, 1, 0):
+ apply_0 = scm_smob_apply_0_010; break;
+ case SCM_GSUBR_MAKTYPE (0, 2, 0):
+ apply_0 = scm_smob_apply_0_020; break;
+ case SCM_GSUBR_MAKTYPE (0, 3, 0):
+ apply_0 = scm_smob_apply_0_030; break;
+ case SCM_GSUBR_MAKTYPE (0, 0, 1):
+ apply_0 = scm_smob_apply_0_001; break;
+ case SCM_GSUBR_MAKTYPE (0, 1, 1):
+ apply_0 = scm_smob_apply_0_011; break;
+ case SCM_GSUBR_MAKTYPE (0, 2, 1):
+ apply_0 = scm_smob_apply_0_021; break;
+ default:
+ apply_0 = scm_smob_apply_0_error; break;
+ }
+
+ switch (type)
+ {
+ case SCM_GSUBR_MAKTYPE (1, 0, 0):
+ case SCM_GSUBR_MAKTYPE (0, 1, 0):
+ apply_1 = apply; break;
+ case SCM_GSUBR_MAKTYPE (1, 1, 0):
+ case SCM_GSUBR_MAKTYPE (0, 2, 0):
+ apply_1 = scm_smob_apply_1_020; break;
+ case SCM_GSUBR_MAKTYPE (1, 2, 0):
+ case SCM_GSUBR_MAKTYPE (0, 3, 0):
+ apply_1 = scm_smob_apply_1_030; break;
+ case SCM_GSUBR_MAKTYPE (0, 0, 1):
+ apply_1 = scm_smob_apply_1_001; break;
+ case SCM_GSUBR_MAKTYPE (1, 0, 1):
+ case SCM_GSUBR_MAKTYPE (0, 1, 1):
+ apply_1 = scm_smob_apply_1_011; break;
+ case SCM_GSUBR_MAKTYPE (1, 1, 1):
+ case SCM_GSUBR_MAKTYPE (0, 2, 1):
+ apply_1 = scm_smob_apply_1_021; break;
+ default:
+ apply_1 = scm_smob_apply_1_error; break;
+ }
+
+ switch (type)
+ {
+ case SCM_GSUBR_MAKTYPE (2, 0, 0):
+ case SCM_GSUBR_MAKTYPE (1, 1, 0):
+ case SCM_GSUBR_MAKTYPE (0, 2, 0):
+ apply_2 = apply; break;
+ case SCM_GSUBR_MAKTYPE (2, 1, 0):
+ case SCM_GSUBR_MAKTYPE (1, 2, 0):
+ case SCM_GSUBR_MAKTYPE (0, 3, 0):
+ apply_2 = scm_smob_apply_2_030; break;
+ case SCM_GSUBR_MAKTYPE (0, 0, 1):
+ apply_2 = scm_smob_apply_2_001; break;
+ case SCM_GSUBR_MAKTYPE (1, 0, 1):
+ case SCM_GSUBR_MAKTYPE (0, 1, 1):
+ apply_2 = scm_smob_apply_2_011; break;
+ case SCM_GSUBR_MAKTYPE (2, 0, 1):
+ case SCM_GSUBR_MAKTYPE (1, 1, 1):
+ case SCM_GSUBR_MAKTYPE (0, 2, 1):
+ apply_2 = scm_smob_apply_2_021; break;
+ default:
+ apply_2 = scm_smob_apply_2_error; break;
+ }
+
+ switch (type)
+ {
+ case SCM_GSUBR_MAKTYPE (3, 0, 0):
+ case SCM_GSUBR_MAKTYPE (2, 1, 0):
+ case SCM_GSUBR_MAKTYPE (1, 2, 0):
+ case SCM_GSUBR_MAKTYPE (0, 3, 0):
+ apply_3 = scm_smob_apply_3_030; break;
+ case SCM_GSUBR_MAKTYPE (0, 0, 1):
+ apply_3 = scm_smob_apply_3_001; break;
+ case SCM_GSUBR_MAKTYPE (1, 0, 1):
+ case SCM_GSUBR_MAKTYPE (0, 1, 1):
+ apply_3 = scm_smob_apply_3_011; break;
+ case SCM_GSUBR_MAKTYPE (2, 0, 1):
+ case SCM_GSUBR_MAKTYPE (1, 1, 1):
+ case SCM_GSUBR_MAKTYPE (0, 2, 1):
+ apply_3 = scm_smob_apply_3_021; break;
+ default:
+ apply_3 = scm_smob_apply_3_error; break;
+ }
+
+ scm_smobs[SCM_TC2SMOBNUM (tc)].apply = apply;
+ scm_smobs[SCM_TC2SMOBNUM (tc)].apply_0 = apply_0;
+ scm_smobs[SCM_TC2SMOBNUM (tc)].apply_1 = apply_1;
+ scm_smobs[SCM_TC2SMOBNUM (tc)].apply_2 = apply_2;
+ scm_smobs[SCM_TC2SMOBNUM (tc)].apply_3 = apply_3;
+ scm_smobs[SCM_TC2SMOBNUM (tc)].gsubr_type = type;
+}
+
+SCM
+scm_make_smob (scm_bits_t tc)
{
- scm_mark0,
- scm_free0,
- 0,
- 0
-};
+ size_t n = SCM_TC2SMOBNUM (tc);
+ size_t size = scm_smobs[n].size;
+ SCM z;
+ SCM_NEWCELL (z);
+ if (size != 0)
+ {
+#if 0
+ if (scm_smobs[n].mark != 0)
+ {
+ fprintf
+ (stderr,
+ "forbidden operation for smobs with GC data, use SCM_NEWSMOB\n");
+ abort ();
+ }
+#endif
+ SCM_SET_SMOB_DATA (z, scm_must_malloc (size, SCM_SMOBNAME (n)));
+ }
+ SCM_SET_CELL_TYPE (z, tc);
+ return z;
+}
+
+\f
+/* {Deprecated stuff}
+ */
+
+#if (SCM_DEBUG_DEPRECATED == 0)
-static scm_smobfuns flob =
+long
+scm_make_smob_type_mfpe (char *name, size_t size,
+ SCM (*mark) (SCM),
+ size_t (*free) (SCM),
+ int (*print) (SCM, SCM, scm_print_state *),
+ SCM (*equalp) (SCM, SCM))
{
- scm_mark0,
- /*flofree*/ 0,
- scm_floprint,
- scm_floequal
-};
+ scm_bits_t answer = scm_make_smob_type (name, size);
+ scm_set_smob_mfpe (answer, mark, free, print, equalp);
+ return answer;
+}
-static scm_smobfuns bigob =
+void
+scm_set_smob_mfpe (long tc,
+ SCM (*mark) (SCM),
+ size_t (*free) (SCM),
+ int (*print) (SCM, SCM, scm_print_state *),
+ SCM (*equalp) (SCM, SCM))
{
- scm_mark0,
- /*bigfree*/ 0,
- scm_bigprint,
- scm_bigequal
-};
+ if (mark) scm_set_smob_mark (tc, mark);
+ if (free) scm_set_smob_free (tc, free);
+ if (print) scm_set_smob_print (tc, print);
+ if (equalp) scm_set_smob_equalp (tc, equalp);
+}
+#endif /* SCM_DEBUG_DEPRECATED == 0 */
+\f
+/* {Initialization for i/o types, float, bignum, the type of free cells}
+ */
+static int
+free_print (SCM exp, SCM port, scm_print_state *pstate)
+{
+ char buf[100];
+
+ sprintf (buf, "#<freed cell %p; GC missed a reference>",
+ (void *) SCM_UNPACK (exp));
+ scm_puts (buf, port);
+
+ return 1;
+}
void
scm_smob_prehistory ()
{
+ size_t i;
+ scm_bits_t tc;
+
scm_numsmob = 0;
- scm_smobs = (scm_smobfuns *) malloc (7 * sizeof (scm_smobfuns));
+ for (i = 0; i < MAX_SMOB_COUNT; ++i)
+ {
+ scm_smobs[i].name = 0;
+ scm_smobs[i].size = 0;
+ scm_smobs[i].mark = 0;
+ scm_smobs[i].free = 0;
+ scm_smobs[i].print = scm_smob_print;
+ scm_smobs[i].equalp = 0;
+ scm_smobs[i].apply = 0;
+ scm_smobs[i].apply_0 = 0;
+ scm_smobs[i].apply_1 = 0;
+ scm_smobs[i].apply_2 = 0;
+ scm_smobs[i].apply_3 = 0;
+ scm_smobs[i].gsubr_type = 0;
+ }
+
+ /* WARNING: These scm_make_smob_type calls must be done in this order */
+ tc = scm_make_smob_type ("free", 0);
+ scm_set_smob_print (tc, free_print);
+
+ tc = scm_make_smob_type ("big", 0); /* freed in gc */
+ scm_set_smob_print (tc, scm_bigprint);
+ scm_set_smob_equalp (tc, scm_bigequal);
+
+ tc = scm_make_smob_type ("real", 0); /* freed in gc */
+ scm_set_smob_print (tc, scm_print_real);
+ scm_set_smob_equalp (tc, scm_real_equalp);
- /* WARNING: These scm_newsmob calls must be done in this order */
- scm_newsmob (&freecell);
- scm_newsmob (&flob);
- scm_newsmob (&bigob);
- scm_newsmob (&bigob); /* n.b.: two smobs, one smobfuns */
+ tc = scm_make_smob_type ("complex", 0); /* freed in gc */
+ scm_set_smob_print (tc, scm_print_complex);
+ scm_set_smob_equalp (tc, scm_complex_equalp);
}
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff