--- /dev/null
+/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2003, 2004, 2006 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 2.1 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
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+
+#include "libguile/_scm.h"
+
+#include "libguile/async.h"
+#include "libguile/objects.h"
+#include "libguile/goops.h"
+#include "libguile/ports.h"
+
+#ifdef HAVE_MALLOC_H
+#include <malloc.h>
+#endif
+
+#include "libguile/smob.h"
+
+\f
+
+/* scm_smobs scm_numsmob
+ * 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).
+ */
+
+#define MAX_SMOB_COUNT 256
+long scm_numsmob;
+scm_smob_descriptor scm_smobs[MAX_SMOB_COUNT];
+
+/* Lower 16 bit of data must be zero.
+*/
+void
+scm_i_set_smob_flags (SCM x, scm_t_bits data)
+{
+ SCM_SET_CELL_WORD_0 (x, (SCM_CELL_WORD_0 (x) & 0xFFFF) | data);
+}
+
+void
+scm_assert_smob_type (scm_t_bits tag, SCM val)
+{
+ if (!SCM_SMOB_PREDICATE (tag, val))
+ scm_wrong_type_arg_msg (NULL, 0, val, scm_smobs[SCM_TC2SMOBNUM(tag)].name);
+}
+
+/* {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 SCM_UNUSED)
+{
+ 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 SCM_UNUSED)
+{
+ return 0;
+}
+
+size_t
+scm_smob_free (SCM obj)
+{
+ long n = SCM_SMOBNUM (obj);
+ if (scm_smobs[n].size > 0)
+ scm_gc_free ((void *) SCM_CELL_WORD_1 (obj),
+ scm_smobs[n].size, SCM_SMOBNAME (n));
+ return 0;
+}
+
+/* {Print}
+ */
+
+int
+scm_smob_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
+{
+ long 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_uintprint (SCM_CELL_WORD_1 (exp), 16, port);
+ else
+ scm_uintprint (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_list_1 (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_UNUSED)
+{
+ 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_list_2 (a1, a2));
+}
+
+static SCM
+scm_smob_apply_2_011 (SCM smob, SCM a1, SCM a2)
+{
+ return SCM_SMOB_APPLY2 (smob, a1, scm_list_1 (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_UNUSED, SCM a2 SCM_UNUSED)
+{
+ scm_wrong_num_args (smob);
+}
+
+static SCM
+scm_smob_apply_3_030 (SCM smob, SCM a1, SCM a2, SCM rst)
+{
+ if (!scm_is_null (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));
+}
+
+static SCM
+scm_smob_apply_3_011 (SCM smob, SCM a1, SCM a2, SCM rst)
+{
+ 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_UNUSED,
+ SCM a2 SCM_UNUSED,
+ SCM rst SCM_UNUSED)
+{
+ scm_wrong_num_args (smob);
+}
+
+\f
+
+scm_t_bits
+scm_make_smob_type (char const *name, size_t size)
+#define FUNC_NAME "scm_make_smob_type"
+{
+ long new_smob;
+
+ SCM_CRITICAL_SECTION_START;
+ new_smob = scm_numsmob;
+ if (scm_numsmob != MAX_SMOB_COUNT)
+ ++scm_numsmob;
+ SCM_CRITICAL_SECTION_END;
+
+ 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[new_smob].size = size;
+ scm_smobs[new_smob].free = scm_smob_free;
+ }
+
+ /* Make a class object if Goops is present. */
+ if (scm_smob_class)
+ scm_smob_class[new_smob] = scm_make_extended_class (name, 0);
+
+ return scm_tc7_smob + new_smob * 256;
+}
+#undef FUNC_NAME
+
+
+void
+scm_set_smob_mark (scm_t_bits tc, SCM (*mark) (SCM))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].mark = mark;
+}
+
+void
+scm_set_smob_free (scm_t_bits tc, size_t (*free) (SCM))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].free = free;
+}
+
+void
+scm_set_smob_print (scm_t_bits tc, int (*print) (SCM, SCM, scm_print_state*))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].print = print;
+}
+
+void
+scm_set_smob_equalp (scm_t_bits tc, SCM (*equalp) (SCM, SCM))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].equalp = equalp;
+}
+
+void
+scm_set_smob_apply (scm_t_bits 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;
+
+ if (scm_smob_class)
+ scm_i_inherit_applicable (scm_smob_class[SCM_TC2SMOBNUM (tc)]);
+}
+
+SCM
+scm_make_smob (scm_t_bits tc)
+{
+ long n = SCM_TC2SMOBNUM (tc);
+ size_t size = scm_smobs[n].size;
+ scm_t_bits data = (size > 0
+ ? (scm_t_bits) scm_gc_malloc (size, SCM_SMOBNAME (n))
+ : 0);
+ return scm_cell (tc, data);
+}
+
+\f
+/* {Initialization for the type of free cells}
+ */
+
+static int
+free_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
+{
+ char buf[100];
+ sprintf (buf, "#<freed cell %p; GC missed a reference>",
+ (void *) SCM_UNPACK (exp));
+ scm_puts (buf, port);
+
+#if (SCM_DEBUG_CELL_ACCESSES == 1)
+ if (scm_debug_cell_accesses_p)
+ abort();
+#endif
+
+
+ return 1;
+}
+
+void
+scm_smob_prehistory ()
+{
+ long i;
+ scm_t_bits tc;
+
+ scm_numsmob = 0;
+ 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: This scm_make_smob_type call must be done first. */
+ tc = scm_make_smob_type ("free", 0);
+ scm_set_smob_print (tc, free_print);
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
projects / lilypond.git / blobdiff