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+#ifndef SCM_UNIFORM_H
+#define SCM_UNIFORM_H
+
+/* Copyright 1995-1997,1999-2001,2004,2006,2008-2009,2013-2014,2018
+ Free Software Foundation, Inc.
+
+ This file is part of Guile.
+
+ Guile 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.
+
+ Guile 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 Guile. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+
+
+#include "libguile/array-handle.h"
+
+
+
+/*
+ * Uniform vectors contain unboxed values. They are not necessarily contiguous.
+ */
+
+SCM_INTERNAL const size_t scm_i_array_element_type_sizes[];
+#define SCM_ARRAY_ELEMENT_TYPE_IS_UNBOXED(t) \
+ (scm_i_array_element_type_sizes[(t)] != 0)
+
+/* type size in bytes */
+SCM_API size_t scm_array_handle_uniform_element_size (scm_t_array_handle *h);
+/* type size in bits */
+SCM_API size_t scm_array_handle_uniform_element_bit_size (scm_t_array_handle *h);
+
+SCM_API const void *scm_array_handle_uniform_elements (scm_t_array_handle *h);
+SCM_API void *scm_array_handle_uniform_writable_elements (scm_t_array_handle *h);
+
+SCM_INTERNAL void scm_init_uniform (void);
+
+
+#endif /* SCM_UNIFORM_H */