parts of unif.[ch] to array-handle.[ch]

* libguile/array-handle.c:
* libguile/array-handle.h: Move some parts of unif.c and unif.h to these
  new files.

* libguile/unif.c:
* libguile/unif.h: Update includers. Since unif.h depends on the array
  handle type, we include array-handle.h, which also means that there
  will be no difference for our callers.

* libguile/init.c: Call scm_init_array_handle, though it does nothing as
  of yet.

* libguile/Makefile.am: Adapt for new files.

libguile/array-handle.c

@@ -0,0 +1,286 @@
+/* Copyright (C) 1995,1996,1997,1998,2000,2001,2002,2003,2004, 2005, 2006, 2009 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 3 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
+ */
+
+
+
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include "libguile/_scm.h"
+#include "libguile/__scm.h"
+
+#include "libguile/array-handle.h"
+#include "libguile/unif.h"
+#include "libguile/strings.h"
+#include "libguile/vectors.h"
+#include "libguile/srfi-4.h"
+#include "libguile/bytevectors.h"
+
+
+static SCM
+enclosed_ref (scm_t_array_handle *h, ssize_t pos)
+{
+  return scm_i_cvref (SCM_I_ARRAY_V (h->array), pos + h->base, 1);
+}
+
+static SCM
+vector_ref (scm_t_array_handle *h, ssize_t pos)
+{
+  return ((const SCM *)h->elements)[pos];
+}
+
+static SCM
+string_ref (scm_t_array_handle *h, ssize_t pos)
+{
+  pos += h->base;
+  if (SCM_I_ARRAYP (h->array))
+    return scm_c_string_ref (SCM_I_ARRAY_V (h->array), pos);
+  else
+    return scm_c_string_ref (h->array, pos);
+}
+
+static SCM
+bitvector_ref (scm_t_array_handle *h, ssize_t pos)
+{
+  pos += scm_array_handle_bit_elements_offset (h);
+  return
+    scm_from_bool (((scm_t_uint32 *)h->elements)[pos/32] & (1l << (pos % 32)));
+}
+
+static SCM
+bytevector_ref (scm_t_array_handle *h, ssize_t pos)
+{
+  return scm_from_uint8 (((scm_t_uint8 *) h->elements)[pos]);
+}
+
+static SCM
+memoize_ref (scm_t_array_handle *h, ssize_t pos)
+{
+  SCM v = h->array;
+
+  if (SCM_I_ENCLOSED_ARRAYP (v))
+    {
+      h->ref = enclosed_ref;
+      return enclosed_ref (h, pos);
+    }
+
+  if (SCM_I_ARRAYP (v))
+    v = SCM_I_ARRAY_V (v);
+
+  if (scm_is_vector (v))
+    {
+      h->elements = scm_array_handle_elements (h);
+      h->ref = vector_ref;
+    }
+  else if (scm_is_uniform_vector (v))
+    {
+      h->elements = scm_array_handle_uniform_elements (h);
+      h->ref = scm_i_uniform_vector_ref_proc (v);
+    }
+  else if (scm_is_string (v))
+    {
+      h->ref = string_ref;
+    }
+  else if (scm_is_bitvector (v))
+    {
+      h->elements = scm_array_handle_bit_elements (h);
+      h->ref = bitvector_ref;
+    }
+  else if (scm_is_bytevector (v))
+    {
+      h->elements = scm_array_handle_uniform_elements (h);
+      h->ref = bytevector_ref;
+    }
+  else
+    scm_misc_error (NULL, "unknown array type: ~a", scm_list_1 (h->array));
+
+  return h->ref (h, pos);
+}
+
+static void
+enclosed_set (scm_t_array_handle *h, ssize_t pos, SCM val)
+{
+  scm_wrong_type_arg_msg (NULL, 0, h->array, "non-enclosed array");
+}
+
+static void
+vector_set (scm_t_array_handle *h, ssize_t pos, SCM val)
+{
+  ((SCM *)h->writable_elements)[pos] = val;
+}
+
+static void
+string_set (scm_t_array_handle *h, ssize_t pos, SCM val)
+{
+  pos += h->base;
+  if (SCM_I_ARRAYP (h->array))
+    scm_c_string_set_x (SCM_I_ARRAY_V (h->array), pos, val);
+  else
+    scm_c_string_set_x (h->array, pos, val);
+}
+
+static void
+bitvector_set (scm_t_array_handle *h, ssize_t pos, SCM val)
+{
+  scm_t_uint32 mask;
+  pos += scm_array_handle_bit_elements_offset (h);
+  mask = 1l << (pos % 32);
+  if (scm_to_bool (val))
+    ((scm_t_uint32 *)h->writable_elements)[pos/32] |= mask;
+  else
+    ((scm_t_uint32 *)h->writable_elements)[pos/32] &= ~mask;
+}
+
+static void
+bytevector_set (scm_t_array_handle *h, ssize_t pos, SCM val)
+{
+  scm_t_uint8 c_value;
+  scm_t_uint8 *elements;
+
+  c_value = scm_to_uint8 (val);
+  elements = (scm_t_uint8 *) h->elements;
+  elements[pos] = (scm_t_uint8) c_value;
+}
+
+static void
+memoize_set (scm_t_array_handle *h, ssize_t pos, SCM val)
+{
+  SCM v = h->array;
+
+  if (SCM_I_ENCLOSED_ARRAYP (v))
+    {
+      h->set = enclosed_set;
+      enclosed_set (h, pos, val);
+      return;
+    }
+
+  if (SCM_I_ARRAYP (v))
+    v = SCM_I_ARRAY_V (v);
+
+  if (scm_is_vector (v))
+    {
+      h->writable_elements = scm_array_handle_writable_elements (h);
+      h->set = vector_set;
+    }
+  else if (scm_is_uniform_vector (v))
+    {
+      h->writable_elements = scm_array_handle_uniform_writable_elements (h);
+      h->set = scm_i_uniform_vector_set_proc (v);
+    }
+  else if (scm_is_string (v))
+    {
+      h->set = string_set;
+    }
+  else if (scm_is_bitvector (v))
+    {
+      h->writable_elements = scm_array_handle_bit_writable_elements (h);
+      h->set = bitvector_set;
+    }
+  else if (scm_is_bytevector (v))
+    {
+      h->elements = scm_array_handle_uniform_writable_elements (h);
+      h->set = bytevector_set;
+    }
+  else
+    scm_misc_error (NULL, "unknown array type: ~a", scm_list_1 (h->array));
+
+  h->set (h, pos, val);
+}
+
+void
+scm_array_get_handle (SCM array, scm_t_array_handle *h)
+{
+  h->array = array;
+  h->ref = memoize_ref;
+  h->set = memoize_set;
+
+  if (SCM_I_ARRAYP (array) || SCM_I_ENCLOSED_ARRAYP (array))
+    {
+      h->dims = SCM_I_ARRAY_DIMS (array);
+      h->base = SCM_I_ARRAY_BASE (array);
+    }
+  else if (scm_is_generalized_vector (array))
+    {
+      h->dim0.lbnd = 0;
+      h->dim0.ubnd = scm_c_generalized_vector_length (array) - 1;
+      h->dim0.inc = 1;
+      h->dims = &h->dim0;
+      h->base = 0;
+    }
+  else
+    scm_wrong_type_arg_msg (NULL, 0, array, "array");
+}
+
+void
+scm_array_handle_release (scm_t_array_handle *h)
+{
+  /* Nothing to do here until arrays need to be reserved for real.
+   */
+}
+
+size_t
+scm_array_handle_rank (scm_t_array_handle *h)
+{
+  if (SCM_I_ARRAYP (h->array) || SCM_I_ENCLOSED_ARRAYP (h->array))
+    return SCM_I_ARRAY_NDIM (h->array);
+  else
+    return 1;
+}
+
+scm_t_array_dim *
+scm_array_handle_dims (scm_t_array_handle *h)
+{
+  return h->dims;
+}
+
+const SCM *
+scm_array_handle_elements (scm_t_array_handle *h)
+{
+  SCM vec = h->array;
+  if (SCM_I_ARRAYP (vec))
+    vec = SCM_I_ARRAY_V (vec);
+  if (SCM_I_IS_VECTOR (vec))
+    return SCM_I_VECTOR_ELTS (vec) + h->base;
+  scm_wrong_type_arg_msg (NULL, 0, h->array, "non-uniform array");
+}
+
+SCM *
+scm_array_handle_writable_elements (scm_t_array_handle *h)
+{
+  SCM vec = h->array;
+  if (SCM_I_ARRAYP (vec))
+    vec = SCM_I_ARRAY_V (vec);
+  if (SCM_I_IS_VECTOR (vec))
+    return SCM_I_VECTOR_WELTS (vec) + h->base;
+  scm_wrong_type_arg_msg (NULL, 0, h->array, "non-uniform array");
+}
+
+
+void
+scm_init_array_handle (void)
+{
+#include "libguile/array-handle.x"
+}
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/