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-rw-r--r--libguile/smob.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/libguile/smob.c b/libguile/smob.c
new file mode 100644
index 000000000..4843d486f
--- /dev/null
+++ b/libguile/smob.c
@@ -0,0 +1,134 @@
+/* Copyright (C) 1995,1996 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, 675 Mass Ave, Cambridge, MA 02139, 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.
+ */
+
+
+#include <stdio.h>
+#include "_scm.h"
+#ifdef HAVE_MALLOC_H
+#include <malloc.h>
+#endif
+
+
+
+/* scm_smobs scm_numsmob
+ * implement a dynamicly resized 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;
+
+#ifdef __STDC__
+long
+scm_newsmob (scm_smobfuns *smob)
+#else
+long
+scm_newsmob (smob)
+ scm_smobfuns *smob;
+#endif
+{
+ 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)
+ {
+ 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_ALLOW_INTS;
+ if (!tmp)
+ smoberr:scm_wta (SCM_MAKINUM ((long) scm_numsmob), (char *) SCM_NALLOC, "newsmob");
+ return scm_tc7_smob + (scm_numsmob - 1) * 256;
+}
+
+/* {Initialization for i/o types, float, bignum, the type of free cells}
+ */
+
+static scm_smobfuns freecell =
+{
+ scm_mark0,
+ scm_free0,
+ 0,
+ 0
+};
+
+static scm_smobfuns flob =
+{
+ scm_mark0,
+ /*flofree*/ 0,
+ scm_floprint,
+ scm_floequal
+};
+
+static scm_smobfuns bigob =
+{
+ scm_mark0,
+ /*bigfree*/ 0,
+ scm_bigprint,
+ scm_bigequal
+};
+
+
+
+#ifdef __STDC__
+void
+scm_smob_prehistory (void)
+#else
+void
+scm_smob_prehistory ()
+#endif
+{
+ scm_numsmob = 0;
+ scm_smobs = (scm_smobfuns *) malloc (7 * sizeof (scm_smobfuns));
+
+ /* 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 */
+}
+