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/* GnuTLS --- Guile bindings for GnuTLS.
Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
GnuTLS 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 2.1 of the License, or (at your option) any later version.
GnuTLS 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 GnuTLS; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
#ifndef GUILE_GNUTLS_UTILS_H
#define GUILE_GNUTLS_UTILS_H
/* Common utilities. */
#include <libguile.h>
/* Compiler twiddling. */
#ifdef __GNUC__
#define EXPECT __builtin_expect
#define NO_RETURN __attribute__ ((__noreturn__))
#else
#define EXPECT(_expr, _value) (_expr)
#define NO_RETURN
#endif
#define EXPECT_TRUE(_expr) EXPECT ((_expr), 1)
#define EXPECT_FALSE(_expr) EXPECT ((_expr), 0)
/* Arrays as byte vectors. */
extern const char scm_gnutls_array_error_message[];
/* Initialize C_HANDLE and C_LEN and return the contiguous C array
corresponding to ARRAY. */
static inline const char *
scm_gnutls_get_array (SCM array, scm_t_array_handle * c_handle,
size_t * c_len, const char *func_name)
{
const char *c_array = NULL;
const scm_t_array_dim *c_dims;
scm_array_get_handle (array, c_handle);
c_dims = scm_array_handle_dims (c_handle);
if ((scm_array_handle_rank (c_handle) != 1) || (c_dims->inc != 1))
{
scm_array_handle_release (c_handle);
scm_misc_error (func_name, scm_gnutls_array_error_message,
scm_list_1 (array));
}
else
{
size_t c_elem_size;
c_elem_size = scm_array_handle_uniform_element_size (c_handle);
*c_len = c_elem_size * (c_dims->ubnd - c_dims->lbnd + 1);
c_array = (char *) scm_array_handle_uniform_elements (c_handle);
}
return (c_array);
}
/* Initialize C_HANDLE and C_LEN and return the contiguous C array
corresponding to ARRAY. The returned array can be written to. */
static inline char *
scm_gnutls_get_writable_array (SCM array, scm_t_array_handle * c_handle,
size_t * c_len, const char *func_name)
{
char *c_array = NULL;
const scm_t_array_dim *c_dims;
scm_array_get_handle (array, c_handle);
c_dims = scm_array_handle_dims (c_handle);
if ((scm_array_handle_rank (c_handle) != 1) || (c_dims->inc != 1))
{
scm_array_handle_release (c_handle);
scm_misc_error (func_name, scm_gnutls_array_error_message,
scm_list_1 (array));
}
else
{
size_t c_elem_size;
c_elem_size = scm_array_handle_uniform_element_size (c_handle);
*c_len = c_elem_size * (c_dims->ubnd - c_dims->lbnd + 1);
c_array =
(char *) scm_array_handle_uniform_writable_elements (c_handle);
}
return (c_array);
}
#define scm_gnutls_release_array scm_array_handle_release
/* Type conversion. */
/* Return a list corresponding to the key usage values ORed in C_USAGE. */
SCM_API SCM scm_from_gnutls_key_usage_flags (unsigned int c_usage);
#endif
/* arch-tag: a33400bc-b5e3-429e-80e0-6ff14cab79e7
*/
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