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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* 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 2 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.
*
* (C) Copyright 2017 Red Hat, Inc.
*/
#ifndef __NM_HASH_UTILS_H__
#define __NM_HASH_UTILS_H__
#include "c-siphash/src/c-siphash.h"
#include "nm-macros-internal.h"
struct _NMHashState {
CSipHash _state;
};
typedef struct _NMHashState NMHashState;
guint nm_hash_static (guint static_seed);
void nm_hash_init (NMHashState *state, guint static_seed);
static inline guint
nm_hash_complete (NMHashState *state)
{
guint64 h;
nm_assert (state);
h = c_siphash_finalize (&state->_state);
/* we don't ever want to return a zero hash.
*
* NMPObject requires that in _idx_obj_part(), and it's just a good idea. */
return (((guint) (h >> 32)) ^ ((guint) h)) ?: 1396707757u;
}
static inline void
nm_hash_update (NMHashState *state, const void *ptr, gsize n)
{
nm_assert (state);
nm_assert (ptr);
nm_assert (n > 0);
c_siphash_append (&state->_state, ptr, n);
}
#define nm_hash_update_val(state, val) \
G_STMT_START { \
typeof (val) _val = (val); \
\
nm_hash_update ((state), &_val, sizeof (_val)); \
} G_STMT_END
static inline void
nm_hash_update_bool (NMHashState *state, bool val)
{
nm_hash_update (state, &val, sizeof (val));
}
#define _NM_HASH_COMBINE_BOOLS_x_1( t, y) ((y) ? ((t) (1ull << 0)) : ((t) 0ull))
#define _NM_HASH_COMBINE_BOOLS_x_2( t, y, ...) ((y) ? ((t) (1ull << 1)) : ((t) 0ull)) | _NM_HASH_COMBINE_BOOLS_x_1 (t, __VA_ARGS__)
#define _NM_HASH_COMBINE_BOOLS_x_3( t, y, ...) ((y) ? ((t) (1ull << 2)) : ((t) 0ull)) | _NM_HASH_COMBINE_BOOLS_x_2 (t, __VA_ARGS__)
#define _NM_HASH_COMBINE_BOOLS_x_4( t, y, ...) ((y) ? ((t) (1ull << 3)) : ((t) 0ull)) | _NM_HASH_COMBINE_BOOLS_x_3 (t, __VA_ARGS__)
#define _NM_HASH_COMBINE_BOOLS_x_5( t, y, ...) ((y) ? ((t) (1ull << 4)) : ((t) 0ull)) | _NM_HASH_COMBINE_BOOLS_x_4 (t, __VA_ARGS__)
#define _NM_HASH_COMBINE_BOOLS_x_6( t, y, ...) ((y) ? ((t) (1ull << 5)) : ((t) 0ull)) | _NM_HASH_COMBINE_BOOLS_x_5 (t, __VA_ARGS__)
#define _NM_HASH_COMBINE_BOOLS_x_7( t, y, ...) ((y) ? ((t) (1ull << 6)) : ((t) 0ull)) | _NM_HASH_COMBINE_BOOLS_x_6 (t, __VA_ARGS__)
#define _NM_HASH_COMBINE_BOOLS_x_8( t, y, ...) ((y) ? ((t) (1ull << 7)) : ((t) 0ull)) | _NM_HASH_COMBINE_BOOLS_x_7 (t, __VA_ARGS__)
#define _NM_HASH_COMBINE_BOOLS_x_9( t, y, ...) ((y) ? ((t) (1ull << 8)) : ((t) 0ull)) | (G_STATIC_ASSERT_EXPR (sizeof (t) >= 2), (_NM_HASH_COMBINE_BOOLS_x_8 (t, __VA_ARGS__)))
#define _NM_HASH_COMBINE_BOOLS_x_10(t, y, ...) ((y) ? ((t) (1ull << 9)) : ((t) 0ull)) | _NM_HASH_COMBINE_BOOLS_x_9 (t, __VA_ARGS__)
#define _NM_HASH_COMBINE_BOOLS_x_11(t, y, ...) ((y) ? ((t) (1ull << 10)) : ((t) 0ull)) | _NM_HASH_COMBINE_BOOLS_x_10 (t, __VA_ARGS__)
#define _NM_HASH_COMBINE_BOOLS_n2(t, n, ...) _NM_HASH_COMBINE_BOOLS_x_##n (t, __VA_ARGS__)
#define _NM_HASH_COMBINE_BOOLS_n(t, n, ...) _NM_HASH_COMBINE_BOOLS_n2(t, n, __VA_ARGS__)
#define NM_HASH_COMBINE_BOOLS(type, ...) ((type) (_NM_HASH_COMBINE_BOOLS_n(type, NM_NARG (__VA_ARGS__), __VA_ARGS__)))
#define nm_hash_update_bools(state, ...) \
nm_hash_update_val (state, NM_HASH_COMBINE_BOOLS (guint8, __VA_ARGS__))
#define _NM_HASH_COMBINE_VALS_typ_x_1( y) typeof (y) _v1;
#define _NM_HASH_COMBINE_VALS_typ_x_2( y, ...) typeof (y) _v2; _NM_HASH_COMBINE_VALS_typ_x_1 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_3( y, ...) typeof (y) _v3; _NM_HASH_COMBINE_VALS_typ_x_2 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_4( y, ...) typeof (y) _v4; _NM_HASH_COMBINE_VALS_typ_x_3 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_5( y, ...) typeof (y) _v5; _NM_HASH_COMBINE_VALS_typ_x_4 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_6( y, ...) typeof (y) _v6; _NM_HASH_COMBINE_VALS_typ_x_5 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_7( y, ...) typeof (y) _v7; _NM_HASH_COMBINE_VALS_typ_x_6 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_8( y, ...) typeof (y) _v8; _NM_HASH_COMBINE_VALS_typ_x_7 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_9( y, ...) typeof (y) _v9; _NM_HASH_COMBINE_VALS_typ_x_8 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_10(y, ...) typeof (y) _v10; _NM_HASH_COMBINE_VALS_typ_x_9 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_11(y, ...) typeof (y) _v11; _NM_HASH_COMBINE_VALS_typ_x_10 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_12(y, ...) typeof (y) _v12; _NM_HASH_COMBINE_VALS_typ_x_11 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_13(y, ...) typeof (y) _v13; _NM_HASH_COMBINE_VALS_typ_x_12 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_14(y, ...) typeof (y) _v14; _NM_HASH_COMBINE_VALS_typ_x_13 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_15(y, ...) typeof (y) _v15; _NM_HASH_COMBINE_VALS_typ_x_14 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_16(y, ...) typeof (y) _v16; _NM_HASH_COMBINE_VALS_typ_x_15 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_17(y, ...) typeof (y) _v17; _NM_HASH_COMBINE_VALS_typ_x_16 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_18(y, ...) typeof (y) _v18; _NM_HASH_COMBINE_VALS_typ_x_17 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_19(y, ...) typeof (y) _v19; _NM_HASH_COMBINE_VALS_typ_x_18 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_x_20(y, ...) typeof (y) _v20; _NM_HASH_COMBINE_VALS_typ_x_19 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_n2(n, ...) _NM_HASH_COMBINE_VALS_typ_x_##n (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_typ_n(n, ...) _NM_HASH_COMBINE_VALS_typ_n2(n, __VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_1( y) ._v1 = (y),
#define _NM_HASH_COMBINE_VALS_val_x_2( y, ...) ._v2 = (y), _NM_HASH_COMBINE_VALS_val_x_1 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_3( y, ...) ._v3 = (y), _NM_HASH_COMBINE_VALS_val_x_2 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_4( y, ...) ._v4 = (y), _NM_HASH_COMBINE_VALS_val_x_3 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_5( y, ...) ._v5 = (y), _NM_HASH_COMBINE_VALS_val_x_4 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_6( y, ...) ._v6 = (y), _NM_HASH_COMBINE_VALS_val_x_5 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_7( y, ...) ._v7 = (y), _NM_HASH_COMBINE_VALS_val_x_6 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_8( y, ...) ._v8 = (y), _NM_HASH_COMBINE_VALS_val_x_7 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_9( y, ...) ._v9 = (y), _NM_HASH_COMBINE_VALS_val_x_8 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_10(y, ...) ._v10 = (y), _NM_HASH_COMBINE_VALS_val_x_9 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_11(y, ...) ._v11 = (y), _NM_HASH_COMBINE_VALS_val_x_10 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_12(y, ...) ._v12 = (y), _NM_HASH_COMBINE_VALS_val_x_11 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_13(y, ...) ._v13 = (y), _NM_HASH_COMBINE_VALS_val_x_12 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_14(y, ...) ._v14 = (y), _NM_HASH_COMBINE_VALS_val_x_13 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_15(y, ...) ._v15 = (y), _NM_HASH_COMBINE_VALS_val_x_14 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_16(y, ...) ._v16 = (y), _NM_HASH_COMBINE_VALS_val_x_15 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_17(y, ...) ._v17 = (y), _NM_HASH_COMBINE_VALS_val_x_16 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_18(y, ...) ._v18 = (y), _NM_HASH_COMBINE_VALS_val_x_17 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_19(y, ...) ._v19 = (y), _NM_HASH_COMBINE_VALS_val_x_18 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_x_20(y, ...) ._v20 = (y), _NM_HASH_COMBINE_VALS_val_x_19 (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_n2(n, ...) _NM_HASH_COMBINE_VALS_val_x_##n (__VA_ARGS__)
#define _NM_HASH_COMBINE_VALS_val_n(n, ...) _NM_HASH_COMBINE_VALS_val_n2(n, __VA_ARGS__)
/* NM_HASH_COMBINE_VALS() is faster then nm_hash_update_val() as it combines multiple
* calls to nm_hash_update() using a packed structure. */
#define NM_HASH_COMBINE_VALS(var, ...) \
const struct _nm_packed { \
_NM_HASH_COMBINE_VALS_typ_n (NM_NARG (__VA_ARGS__), __VA_ARGS__) \
} var _nm_alignas (guint64) = { \
_NM_HASH_COMBINE_VALS_val_n (NM_NARG (__VA_ARGS__), __VA_ARGS__) \
}
/* nm_hash_update_vals() is faster then nm_hash_update_val() as it combines multiple
* calls to nm_hash_update() using a packed structure. */
#define nm_hash_update_vals(state, ...) \
G_STMT_START { \
NM_HASH_COMBINE_VALS (_val, __VA_ARGS__); \
\
nm_hash_update ((state), &_val, sizeof (_val)); \
} G_STMT_END
static inline void
nm_hash_update_mem (NMHashState *state, const void *ptr, gsize n)
{
/* This also hashes the length of the data. That means,
* hashing two consecutive binary fields (of arbitrary
* length), will hash differently. That is,
* [[1,1], []] differs from [[1],[1]].
*
* If you have a constant length (sizeof), use nm_hash_update()
* instead. */
nm_hash_update (state, &n, sizeof (n));
if (n > 0)
nm_hash_update (state, ptr, n);
}
static inline void
nm_hash_update_str0 (NMHashState *state, const char *str)
{
if (str)
nm_hash_update_mem (state, str, strlen (str));
else {
gsize n = G_MAXSIZE;
nm_hash_update (state, &n, sizeof (n));
}
}
static inline void
nm_hash_update_str (NMHashState *state, const char *str)
{
nm_assert (str);
nm_hash_update (state, str, strlen (str) + 1);
}
#if _NM_CC_SUPPORT_GENERIC
/* Like nm_hash_update_str(), but restricted to arrays only. nm_hash_update_str() only works
* with a @str argument that cannot be NULL. If you have a string pointer, that is never NULL, use
* nm_hash_update() instead. */
#define nm_hash_update_strarr(state, str) \
(_Generic (&(str), \
const char (*) [sizeof (str)]: nm_hash_update_str ((state), (str)), \
char (*) [sizeof (str)]: nm_hash_update_str ((state), (str))) \
)
#else
#define nm_hash_update_strarr(state, str) nm_hash_update_str ((state), (str))
#endif
guint nm_hash_ptr (gconstpointer ptr);
guint nm_direct_hash (gconstpointer str);
guint nm_hash_str (const char *str);
guint nm_str_hash (gconstpointer str);
#define nm_hash_val(static_seed, val) \
({ \
NMHashState _h; \
\
nm_hash_init (&_h, static_seed); \
nm_hash_update_val (&_h, val); \
nm_hash_complete (&_h); \
})
/*****************************************************************************/
/* nm_pstr_*() are for hashing keys that are pointers to strings,
* that is, "const char *const*" types, using strcmp(). */
guint nm_pstr_hash (gconstpointer p);
gboolean nm_pstr_equal (gconstpointer a, gconstpointer b);
/*****************************************************************************/
#endif /* __NM_HASH_UTILS_H__ */
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