1 files changed, 294 insertions, 0 deletions
diff --git a/src/objcodes.c b/src/objcodes.c
new file mode 100644
index 000000000..4306d3f47
--- /dev/null
+++ b/src/objcodes.c
@@ -0,0 +1,294 @@
+/* Copyright (C) 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
+ * 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.  */
+
+#if HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <assert.h>
+
+#include "programs.h"
+#include "objcodes.h"
+
+#define OBJCODE_COOKIE "GOOF-0.5"
+
+
+/*
+ * Objcode type
+ */
+
+scm_t_bits scm_tc16_objcode;
+
+static SCM
+make_objcode (size_t size)
+#define FUNC_NAME "make_objcode"
+{
+  struct scm_objcode *p = scm_gc_malloc (sizeof (struct scm_objcode),
+					 "objcode");
+  p->size = size;
+  p->base = scm_gc_malloc (size, "objcode-base");
+  p->fd   = -1;
+  SCM_RETURN_NEWSMOB (scm_tc16_objcode, p);
+}
+#undef FUNC_NAME
+
+static SCM
+make_objcode_by_mmap (int fd)
+#define FUNC_NAME "make_objcode_by_mmap"
+{
+  int ret;
+  char *addr;
+  struct stat st;
+  struct scm_objcode *p;
+
+  ret = fstat (fd, &st);
+  if (ret < 0)
+    SCM_SYSERROR;
+
+  if (st.st_size <= strlen (OBJCODE_COOKIE))
+    scm_misc_error (FUNC_NAME, "object file too small (~a bytes)",
+		    SCM_LIST1 (SCM_I_MAKINUM (st.st_size)));
+
+  addr = mmap (0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+  if (addr == MAP_FAILED)
+    SCM_SYSERROR;
+
+  if (memcmp (addr, OBJCODE_COOKIE, strlen (OBJCODE_COOKIE)))
+    SCM_SYSERROR;
+
+  p = scm_gc_malloc (sizeof (struct scm_objcode), "objcode");
+  p->size = st.st_size;
+  p->base = addr;
+  p->fd   = fd;
+  SCM_RETURN_NEWSMOB (scm_tc16_objcode, p);
+}
+#undef FUNC_NAME
+
+static scm_sizet
+objcode_free (SCM obj)
+#define FUNC_NAME "objcode_free"
+{
+  size_t size = sizeof (struct scm_objcode);
+  struct scm_objcode *p = SCM_OBJCODE_DATA (obj);
+
+  if (p->fd >= 0)
+    {
+      int rv;
+      rv = munmap (p->base, p->size);
+      if (rv < 0) SCM_SYSERROR;
+      rv = close (p->fd);
+      if (rv < 0) SCM_SYSERROR;
+    }
+  else
+    scm_gc_free (p->base, p->size, "objcode-base");
+
+  scm_gc_free (p, size, "objcode");
+
+  return 0;
+}
+#undef FUNC_NAME
+
+
+/*
+ * Scheme interface
+ */
+
+#if 0
+SCM_DEFINE (scm_do_pair, "do-pair", 2, 0, 0,
+	    (SCM car, SCM cdr),
+	    "This is a stupid test to see how cells work.  (Ludo)")
+{
+  static SCM room[512];
+  static SCM *where = &room[0];
+  SCM the_pair;
+  size_t incr;
+
+  if ((scm_t_bits)where & 6)
+    {
+      /* Align the cell pointer so that Guile considers it as a
+	 non-immediate object (see tags.h).  */
+      incr = (scm_t_bits)where & 6;
+      incr = (~incr) & 7;
+      where += incr;
+    }
+
+  printf ("do-pair: pool @ %p, pair @ %p\n", &room[0], where);
+  where[0] = car;
+  where[1] = cdr;
+
+  the_pair = PTR2SCM (where);
+  /* This doesn't work because SCM_SET_GC_MARK will look for some sort of a
+     "mark bitmap" at the end of a supposed cell segment which doesn't
+     exist.  */
+
+  return (the_pair);
+}
+#endif
+
+SCM_DEFINE (scm_objcode_p, "objcode?", 1, 0, 0,
+	    (SCM obj),
+	    "")
+#define FUNC_NAME s_scm_objcode_p
+{
+  return SCM_BOOL (SCM_OBJCODE_P (obj));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_bytecode_to_objcode, "bytecode->objcode", 3, 0, 0,
+	    (SCM bytecode, SCM nlocs, SCM nexts),
+	    "")
+#define FUNC_NAME s_scm_bytecode_to_objcode
+{
+  size_t size;
+  ssize_t increment;
+  scm_t_array_handle handle;
+  char *base;
+  const scm_t_uint8 *c_bytecode;
+  SCM objcode;
+
+  if (scm_u8vector_p (bytecode) != SCM_BOOL_T)
+    scm_wrong_type_arg (FUNC_NAME, 1, bytecode);
+  SCM_VALIDATE_NUMBER (2, nlocs);
+  SCM_VALIDATE_NUMBER (3, nexts);
+
+  c_bytecode = scm_u8vector_elements (bytecode, &handle, &size, &increment);
+  assert (increment == 1);
+
+  /* Account for the 10 byte-long header.  */
+  size += 10;
+  objcode = make_objcode (size);
+  base = SCM_OBJCODE_BASE (objcode);
+
+  memcpy (base, OBJCODE_COOKIE, 8);
+  base[8] = scm_to_uint8 (nlocs);
+  base[9] = scm_to_uint8 (nexts);
+
+  memcpy (base + 10, c_bytecode, size - 10);
+
+  scm_array_handle_release (&handle);
+
+  return objcode;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_load_objcode, "load-objcode", 1, 0, 0,
+	    (SCM file),
+	    "")
+#define FUNC_NAME s_scm_load_objcode
+{
+  int fd;
+  char *c_file;
+
+  SCM_VALIDATE_STRING (1, file);
+
+  c_file = scm_to_locale_string (file);
+  fd = open (c_file, O_RDONLY);
+  free (c_file);
+  if (fd < 0) SCM_SYSERROR;
+
+  return make_objcode_by_mmap (fd);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_objcode_to_u8vector, "objcode->u8vector", 1, 0, 0,
+	    (SCM objcode),
+	    "")
+#define FUNC_NAME s_scm_objcode_to_u8vector
+{
+  scm_t_uint8 *u8vector;
+  size_t size;
+
+  SCM_VALIDATE_OBJCODE (1, objcode);
+
+  size = SCM_OBJCODE_SIZE (objcode);
+  /* FIXME:  Is `gc_malloc' ok here? */
+  u8vector = scm_gc_malloc (size, "objcode-u8vector");
+  memcpy (u8vector, SCM_OBJCODE_BASE (objcode), size);
+
+  return scm_take_u8vector (u8vector, size);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_objcode_to_program, "objcode->program", 1, 0, 0,
+	    (SCM objcode),
+	    "")
+#define FUNC_NAME s_scm_objcode_to_program
+{
+  SCM prog;
+  size_t size;
+  char *base;
+  struct scm_program *p;
+
+  SCM_VALIDATE_OBJCODE (1, objcode);
+
+  base = SCM_OBJCODE_BASE (objcode);
+  size = SCM_OBJCODE_SIZE (objcode);
+  prog = scm_c_make_program (base + 10, size - 10, objcode);
+  p = SCM_PROGRAM_DATA (prog);
+  p->nlocs = base[8];
+  p->nexts = base[9];
+  return prog;
+}
+#undef FUNC_NAME
+
+
+void
+scm_init_objcodes (void)
+{
+  scm_tc16_objcode = scm_make_smob_type ("objcode", 0);
+  scm_set_smob_free (scm_tc16_objcode, objcode_free);
+
+#ifndef SCM_MAGIC_SNARFER
+#include "objcodes.x"
+#endif
+}
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/