Make bytevectors accessible using the generalized-vector API.

As a side effect, this allows compilation of literal bytevectors
("#vu8(...)"), which gets done by the generic array handling
of the GLIL->assembly compiler.

* doc/ref/api-compound.texi (Generalized Vectors): Mention bytevectors.
  (Arrays, Array Syntax): Likewise.

* doc/ref/api-data.texi (Bytevectors as Generalized Vectors): New node.

* libguile/bytevectors.c (scm_i_bytevector_generalized_set_x): New.

* libguile/bytevectors.h (scm_i_bytevector_generalized_set_x): New
  declaration.

* libguile/srfi-4.c (scm_i_generalized_vector_type,
  scm_array_handle_uniform_element_size,
  scm_array_handle_uniform_writable_elements): Add support for
  bytevectors.

* libguile/unif.c (type_creator_table): Add `vu8'.
  (bytevector_ref, bytevector_set): New functions.
  (memoize_ref, memoize_set): Add support for bytevectors.

* libguile/vectors.c (scm_is_generalized_vector,
  scm_c_generalized_vector_length, scm_c_generalized_vector_ref,
  scm_c_generalized_vector_set_x): Add support for bytevectors.

* test-suite/tests/bytevectors.test ("Generalized Vectors"): New test
  set.

1 files changed, 8 insertions, 1 deletions

diff --git a/libguile/srfi-4.c b/libguile/srfi-4.c
index ac31fdc10..da571b0b8 100644
--- a/libguile/srfi-4.c
+++ b/libguile/srfi-4.c
@@ -1,6 +1,6 @@
 /* srfi-4.c --- Uniform numeric vector datatypes.
  *
- * 	Copyright (C) 2001, 2004, 2006 Free Software Foundation, Inc.
+ * 	Copyright (C) 2001, 2004, 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
@@ -29,6 +29,7 @@
 #include "libguile/_scm.h"
 #include "libguile/__scm.h"
 #include "libguile/srfi-4.h"
+#include "libguile/bytevectors.h"
 #include "libguile/error.h"
 #include "libguile/read.h"
 #include "libguile/ports.h"
@@ -609,6 +610,8 @@ scm_i_generalized_vector_type (SCM v)
     return scm_sym_b;
   else if (scm_is_uniform_vector (v))
     return scm_from_locale_symbol (uvec_tags[SCM_UVEC_TYPE(v)]);
+  else if (scm_is_bytevector (v))
+    return scm_from_locale_symbol ("vu8");
   else
     return SCM_BOOL_F;
 }
@@ -750,6 +753,8 @@ scm_array_handle_uniform_element_size (scm_t_array_handle *h)
     vec = SCM_I_ARRAY_V (vec);
   if (scm_is_uniform_vector (vec))
     return uvec_sizes[SCM_UVEC_TYPE(vec)];
+  if (scm_is_bytevector (vec))
+    return 1U;
   scm_wrong_type_arg_msg (NULL, 0, h->array, "uniform array");
 }
 
@@ -790,6 +795,8 @@ scm_array_handle_uniform_writable_elements (scm_t_array_handle *h)
       char *elts = SCM_UVEC_BASE (vec);
       return (void *) (elts + size*h->base);
     }
+  if (scm_is_bytevector (vec))
+    return SCM_BYTEVECTOR_CONTENTS (vec);
   scm_wrong_type_arg_msg (NULL, 0, h->array, "uniform array");
 }