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-rw-r--r--vpp/vppinfra/vppinfra/hash.c1095
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diff --git a/vpp/vppinfra/vppinfra/hash.c b/vpp/vppinfra/vppinfra/hash.c
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+++ b/vpp/vppinfra/vppinfra/hash.c
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+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ Copyright (c) 2001-2005 Eliot Dresselhaus
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <vppinfra/hash.h>
+#include <vppinfra/error.h>
+#include <vppinfra/mem.h>
+#include <vppinfra/byte_order.h> /* for clib_arch_is_big_endian */
+
+always_inline void
+zero_pair (hash_t * h, hash_pair_t * p)
+{
+ memset (p, 0, hash_pair_bytes (h));
+}
+
+always_inline void
+init_pair (hash_t * h, hash_pair_t * p)
+{
+ memset (p->value, ~0, hash_value_bytes (h));
+}
+
+always_inline hash_pair_union_t *
+get_pair (void *v, uword i)
+{
+ hash_t *h = hash_header (v);
+ hash_pair_t *p;
+ ASSERT (i < vec_len (v));
+ p = v;
+ p += i << h->log2_pair_size;
+ return (hash_pair_union_t *) p;
+}
+
+always_inline void
+set_is_user (void *v, uword i, uword is_user)
+{
+ hash_t *h = hash_header (v);
+ uword i0 = i / BITS (h->is_user[0]);
+ uword i1 = (uword) 1 << (i % BITS (h->is_user[0]));
+ if (is_user)
+ h->is_user[i0] |= i1;
+ else
+ h->is_user[i0] &= ~i1;
+}
+
+static u8 *hash_format_pair_default (u8 * s, va_list * args);
+
+#if uword_bits == 64
+
+static inline u64
+zap64 (u64 x, word n)
+{
+#define _(n) (((u64) 1 << (u64) (8*(n))) - (u64) 1)
+ static u64 masks_little_endian[] = {
+ 0, _(1), _(2), _(3), _(4), _(5), _(6), _(7),
+ };
+ static u64 masks_big_endian[] = {
+ 0, ~_(7), ~_(6), ~_(5), ~_(4), ~_(3), ~_(2), ~_(1),
+ };
+#undef _
+ if (clib_arch_is_big_endian)
+ return x & masks_big_endian[n];
+ else
+ return x & masks_little_endian[n];
+}
+
+static inline u64
+hash_memory64 (void *p, word n_bytes, u64 state)
+{
+ u64 *q = p;
+ u64 a, b, c, n;
+
+ a = b = 0x9e3779b97f4a7c13LL;
+ c = state;
+ n = n_bytes;
+
+ while (n >= 3 * sizeof (u64))
+ {
+ a += clib_mem_unaligned (q + 0, u64);
+ b += clib_mem_unaligned (q + 1, u64);
+ c += clib_mem_unaligned (q + 2, u64);
+ hash_mix64 (a, b, c);
+ n -= 3 * sizeof (u64);
+ q += 3;
+ }
+
+ c += n_bytes;
+ switch (n / sizeof (u64))
+ {
+ case 2:
+ a += clib_mem_unaligned (q + 0, u64);
+ b += clib_mem_unaligned (q + 1, u64);
+ if (n % sizeof (u64))
+ c += zap64 (clib_mem_unaligned (q + 2, u64), n % sizeof (u64)) << 8;
+ break;
+
+ case 1:
+ a += clib_mem_unaligned (q + 0, u64);
+ if (n % sizeof (u64))
+ b += zap64 (clib_mem_unaligned (q + 1, u64), n % sizeof (u64));
+ break;
+
+ case 0:
+ if (n % sizeof (u64))
+ a += zap64 (clib_mem_unaligned (q + 0, u64), n % sizeof (u64));
+ break;
+ }
+
+ hash_mix64 (a, b, c);
+
+ return c;
+}
+
+#else /* if uword_bits == 64 */
+
+static inline u32
+zap32 (u32 x, word n)
+{
+#define _(n) (((u32) 1 << (u32) (8*(n))) - (u32) 1)
+ static u32 masks_little_endian[] = {
+ 0, _(1), _(2), _(3),
+ };
+ static u32 masks_big_endian[] = {
+ 0, ~_(3), ~_(2), ~_(1),
+ };
+#undef _
+ if (clib_arch_is_big_endian)
+ return x & masks_big_endian[n];
+ else
+ return x & masks_little_endian[n];
+}
+
+static inline u32
+hash_memory32 (void *p, word n_bytes, u32 state)
+{
+ u32 *q = p;
+ u32 a, b, c, n;
+
+ a = b = 0x9e3779b9;
+ c = state;
+ n = n_bytes;
+
+ while (n >= 3 * sizeof (u32))
+ {
+ a += clib_mem_unaligned (q + 0, u32);
+ b += clib_mem_unaligned (q + 1, u32);
+ c += clib_mem_unaligned (q + 2, u32);
+ hash_mix32 (a, b, c);
+ n -= 3 * sizeof (u32);
+ q += 3;
+ }
+
+ c += n_bytes;
+ switch (n / sizeof (u32))
+ {
+ case 2:
+ a += clib_mem_unaligned (q + 0, u32);
+ b += clib_mem_unaligned (q + 1, u32);
+ if (n % sizeof (u32))
+ c += zap32 (clib_mem_unaligned (q + 2, u32), n % sizeof (u32)) << 8;
+ break;
+
+ case 1:
+ a += clib_mem_unaligned (q + 0, u32);
+ if (n % sizeof (u32))
+ b += zap32 (clib_mem_unaligned (q + 1, u32), n % sizeof (u32));
+ break;
+
+ case 0:
+ if (n % sizeof (u32))
+ a += zap32 (clib_mem_unaligned (q + 0, u32), n % sizeof (u32));
+ break;
+ }
+
+ hash_mix32 (a, b, c);
+
+ return c;
+}
+#endif
+
+uword
+hash_memory (void *p, word n_bytes, uword state)
+{
+ uword *q = p;
+
+#if uword_bits == 64
+ return hash_memory64 (q, n_bytes, state);
+#else
+ return hash_memory32 (q, n_bytes, state);
+#endif
+}
+
+#if uword_bits == 64
+always_inline uword
+hash_uword (uword x)
+{
+ u64 a, b, c;
+
+ a = b = 0x9e3779b97f4a7c13LL;
+ c = 0;
+ a += x;
+ hash_mix64 (a, b, c);
+ return c;
+}
+#else
+always_inline uword
+hash_uword (uword x)
+{
+ u32 a, b, c;
+
+ a = b = 0x9e3779b9;
+ c = 0;
+ a += x;
+ hash_mix32 (a, b, c);
+ return c;
+}
+#endif
+
+/* Call sum function. Hash code will be sum function value
+ modulo the prime length of the hash table. */
+always_inline uword
+key_sum (hash_t * h, uword key)
+{
+ uword sum;
+ switch (pointer_to_uword ((void *) h->key_sum))
+ {
+ case KEY_FUNC_NONE:
+ sum = hash_uword (key);
+ break;
+
+ case KEY_FUNC_POINTER_UWORD:
+ sum = hash_uword (*uword_to_pointer (key, uword *));
+ break;
+
+ case KEY_FUNC_POINTER_U32:
+ sum = hash_uword (*uword_to_pointer (key, u32 *));
+ break;
+
+ case KEY_FUNC_STRING:
+ sum = string_key_sum (h, key);
+ break;
+
+ default:
+ sum = h->key_sum (h, key);
+ break;
+ }
+
+ return sum;
+}
+
+always_inline uword
+key_equal1 (hash_t * h, uword key1, uword key2, uword e)
+{
+ switch (pointer_to_uword ((void *) h->key_equal))
+ {
+ case KEY_FUNC_NONE:
+ break;
+
+ case KEY_FUNC_POINTER_UWORD:
+ e =
+ *uword_to_pointer (key1, uword *) == *uword_to_pointer (key2,
+ uword *);
+ break;
+
+ case KEY_FUNC_POINTER_U32:
+ e = *uword_to_pointer (key1, u32 *) == *uword_to_pointer (key2, u32 *);
+ break;
+
+ case KEY_FUNC_STRING:
+ e = string_key_equal (h, key1, key2);
+ break;
+
+ default:
+ e = h->key_equal (h, key1, key2);
+ break;
+ }
+ return e;
+}
+
+/* Compares two keys: returns 1 if equal, 0 if not. */
+always_inline uword
+key_equal (hash_t * h, uword key1, uword key2)
+{
+ uword e = key1 == key2;
+ if (CLIB_DEBUG > 0 && key1 == key2)
+ ASSERT (key_equal1 (h, key1, key2, e));
+ if (!e)
+ e = key_equal1 (h, key1, key2, e);
+ return e;
+}
+
+static hash_pair_union_t *
+get_indirect (void *v, hash_pair_indirect_t * pi, uword key)
+{
+ hash_t *h = hash_header (v);
+ hash_pair_t *p0, *p1;
+
+ p0 = p1 = pi->pairs;
+ if (h->log2_pair_size > 0)
+ p1 = hash_forward (h, p0, indirect_pair_get_len (pi));
+ else
+ p1 += vec_len (p0);
+
+ while (p0 < p1)
+ {
+ if (key_equal (h, p0->key, key))
+ return (hash_pair_union_t *) p0;
+ p0 = hash_forward1 (h, p0);
+ }
+
+ return (hash_pair_union_t *) 0;
+}
+
+static hash_pair_union_t *
+set_indirect_is_user (void *v, uword i, hash_pair_union_t * p, uword key)
+{
+ hash_t *h = hash_header (v);
+ hash_pair_t *q;
+ hash_pair_indirect_t *pi = &p->indirect;
+ uword log2_bytes = 0;
+
+ if (h->log2_pair_size == 0)
+ q = vec_new (hash_pair_t, 2);
+ else
+ {
+ log2_bytes = 1 + hash_pair_log2_bytes (h);
+ q = clib_mem_alloc (1ULL << log2_bytes);
+ }
+ clib_memcpy (q, &p->direct, hash_pair_bytes (h));
+
+ pi->pairs = q;
+ if (h->log2_pair_size > 0)
+ indirect_pair_set (pi, log2_bytes, 2);
+
+ set_is_user (v, i, 0);
+
+ /* First element is used by existing pair, second will be used by caller. */
+ q = hash_forward1 (h, q);
+ q->key = key;
+ init_pair (h, q);
+ return (hash_pair_union_t *) q;
+}
+
+static hash_pair_union_t *
+set_indirect (void *v, hash_pair_indirect_t * pi, uword key,
+ uword * found_key)
+{
+ hash_t *h = hash_header (v);
+ hash_pair_t *new_pair;
+ hash_pair_union_t *q;
+
+ q = get_indirect (v, pi, key);
+ if (q)
+ {
+ *found_key = 1;
+ return q;
+ }
+
+ if (h->log2_pair_size == 0)
+ vec_add2 (pi->pairs, new_pair, 1);
+ else
+ {
+ uword len, new_len, log2_bytes;
+
+ len = indirect_pair_get_len (pi);
+ log2_bytes = indirect_pair_get_log2_bytes (pi);
+
+ new_len = len + 1;
+ if (new_len * hash_pair_bytes (h) > (1ULL << log2_bytes))
+ {
+ pi->pairs = clib_mem_realloc (pi->pairs,
+ 1ULL << (log2_bytes + 1),
+ 1ULL << log2_bytes);
+ log2_bytes++;
+ }
+
+ indirect_pair_set (pi, log2_bytes, new_len);
+ new_pair = pi->pairs + (len << h->log2_pair_size);
+ }
+ new_pair->key = key;
+ init_pair (h, new_pair);
+ *found_key = 0;
+ return (hash_pair_union_t *) new_pair;
+}
+
+static void
+unset_indirect (void *v, uword i, hash_pair_t * q)
+{
+ hash_t *h = hash_header (v);
+ hash_pair_union_t *p = get_pair (v, i);
+ hash_pair_t *e;
+ hash_pair_indirect_t *pi = &p->indirect;
+ uword len, is_vec;
+
+ is_vec = h->log2_pair_size == 0;
+
+ ASSERT (!hash_is_user (v, i));
+ len = is_vec ? vec_len (pi->pairs) : indirect_pair_get_len (pi);
+ e = hash_forward (h, pi->pairs, len - 1);
+ ASSERT (q >= pi->pairs && q <= e);
+
+ /* We have two or fewer pairs and we are delete one pair.
+ Make indirect pointer direct and free indirect memory. */
+ if (len <= 2)
+ {
+ hash_pair_t *r = pi->pairs;
+
+ if (len == 2)
+ {
+ clib_memcpy (p, q == r ? hash_forward1 (h, r) : r,
+ hash_pair_bytes (h));
+ set_is_user (v, i, 1);
+ }
+ else
+ zero_pair (h, &p->direct);
+
+ if (is_vec)
+ vec_free (r);
+ else if (r)
+ clib_mem_free (r);
+ }
+ else
+ {
+ /* If deleting a pair we need to keep non-null pairs together. */
+ if (q < e)
+ clib_memcpy (q, e, hash_pair_bytes (h));
+ else
+ zero_pair (h, q);
+ if (is_vec)
+ _vec_len (pi->pairs) -= 1;
+ else
+ indirect_pair_set (pi, indirect_pair_get_log2_bytes (pi), len - 1);
+ }
+}
+
+enum lookup_opcode
+{
+ GET = 1,
+ SET = 2,
+ UNSET = 3,
+};
+
+static hash_pair_t *
+lookup (void *v, uword key, enum lookup_opcode op,
+ void *new_value, void *old_value)
+{
+ hash_t *h = hash_header (v);
+ hash_pair_union_t *p = 0;
+ uword found_key = 0;
+ uword i;
+
+ if (!v)
+ return 0;
+
+ i = key_sum (h, key) & (_vec_len (v) - 1);
+ p = get_pair (v, i);
+
+ if (hash_is_user (v, i))
+ {
+ found_key = key_equal (h, p->direct.key, key);
+ if (found_key)
+ {
+ if (op == UNSET)
+ {
+ set_is_user (v, i, 0);
+ if (old_value)
+ clib_memcpy (old_value, p->direct.value,
+ hash_value_bytes (h));
+ zero_pair (h, &p->direct);
+ }
+ }
+ else
+ {
+ if (op == SET)
+ p = set_indirect_is_user (v, i, p, key);
+ else
+ p = 0;
+ }
+ }
+ else
+ {
+ hash_pair_indirect_t *pi = &p->indirect;
+
+ if (op == SET)
+ {
+ if (!pi->pairs)
+ {
+ p->direct.key = key;
+ set_is_user (v, i, 1);
+ }
+ else
+ p = set_indirect (v, pi, key, &found_key);
+ }
+ else
+ {
+ p = get_indirect (v, pi, key);
+ found_key = p != 0;
+ if (found_key && op == UNSET)
+ {
+ if (old_value)
+ clib_memcpy (old_value, &p->direct.value,
+ hash_value_bytes (h));
+
+ unset_indirect (v, i, &p->direct);
+
+ /* Nullify p (since it's just been deleted).
+ Otherwise we might be tempted to play with it. */
+ p = 0;
+ }
+ }
+ }
+
+ if (op == SET && p != 0)
+ {
+ /* Save away old value for caller. */
+ if (old_value && found_key)
+ clib_memcpy (old_value, &p->direct.value, hash_value_bytes (h));
+ clib_memcpy (&p->direct.value, new_value, hash_value_bytes (h));
+ }
+
+ if (op == SET)
+ h->elts += !found_key;
+ if (op == UNSET)
+ h->elts -= found_key;
+
+ return &p->direct;
+}
+
+/* Fetch value of key. */
+uword *
+_hash_get (void *v, uword key)
+{
+ hash_t *h = hash_header (v);
+ hash_pair_t *p;
+
+ /* Don't even search table if its empty. */
+ if (!v || h->elts == 0)
+ return 0;
+
+ p = lookup (v, key, GET, 0, 0);
+ if (!p)
+ return 0;
+ if (h->log2_pair_size == 0)
+ return &p->key;
+ else
+ return &p->value[0];
+}
+
+hash_pair_t *
+_hash_get_pair (void *v, uword key)
+{
+ return lookup (v, key, GET, 0, 0);
+}
+
+hash_pair_t *
+hash_next (void *v, hash_next_t * hn)
+{
+ hash_t *h = hash_header (v);
+ hash_pair_t *p;
+
+ while (1)
+ {
+ if (hn->i == 0 && hn->j == 0)
+ {
+ /* Save flags. */
+ hn->f = h->flags;
+
+ /* Prevent others from re-sizing hash table. */
+ h->flags |=
+ (HASH_FLAG_NO_AUTO_GROW
+ | HASH_FLAG_NO_AUTO_SHRINK | HASH_FLAG_HASH_NEXT_IN_PROGRESS);
+ }
+ else if (hn->i >= hash_capacity (v))
+ {
+ /* Restore flags. */
+ h->flags = hn->f;
+ memset (hn, 0, sizeof (hn[0]));
+ return 0;
+ }
+
+ p = hash_forward (h, v, hn->i);
+ if (hash_is_user (v, hn->i))
+ {
+ hn->i++;
+ return p;
+ }
+ else
+ {
+ hash_pair_indirect_t *pi = (void *) p;
+ uword n;
+
+ if (h->log2_pair_size > 0)
+ n = indirect_pair_get_len (pi);
+ else
+ n = vec_len (pi->pairs);
+
+ if (hn->j >= n)
+ {
+ hn->i++;
+ hn->j = 0;
+ }
+ else
+ return hash_forward (h, pi->pairs, hn->j++);
+ }
+ }
+}
+
+/* Remove key from table. */
+void *
+_hash_unset (void *v, uword key, void *old_value)
+{
+ hash_t *h;
+
+ if (!v)
+ return v;
+
+ (void) lookup (v, key, UNSET, 0, old_value);
+
+ h = hash_header (v);
+ if (!(h->flags & HASH_FLAG_NO_AUTO_SHRINK))
+ {
+ /* Resize when 1/4 full. */
+ if (h->elts > 32 && 4 * (h->elts + 1) < vec_len (v))
+ v = hash_resize (v, vec_len (v) / 2);
+ }
+
+ return v;
+}
+
+void *
+_hash_create (uword elts, hash_t * h_user)
+{
+ hash_t *h;
+ uword log2_pair_size;
+ void *v;
+
+ /* Size of hash is power of 2 >= ELTS and larger than
+ number of bits in is_user bitmap elements. */
+ elts = clib_max (elts, BITS (h->is_user[0]));
+ elts = 1ULL << max_log2 (elts);
+
+ log2_pair_size = 1;
+ if (h_user)
+ log2_pair_size = h_user->log2_pair_size;
+
+ v = _vec_resize (0,
+ /* vec len: */ elts,
+ /* data bytes: */
+ (elts << log2_pair_size) * sizeof (hash_pair_t),
+ /* header bytes: */
+ sizeof (h[0]) +
+ (elts / BITS (h->is_user[0])) * sizeof (h->is_user[0]),
+ /* alignment */ sizeof (hash_pair_t));
+ h = hash_header (v);
+
+ if (h_user)
+ h[0] = h_user[0];
+
+ h->log2_pair_size = log2_pair_size;
+ h->elts = 0;
+
+ /* Default flags to never shrinking hash tables.
+ Shrinking tables can cause "jackpot" cases. */
+ if (!h_user)
+ h->flags = HASH_FLAG_NO_AUTO_SHRINK;
+
+ if (!h->format_pair)
+ {
+ h->format_pair = hash_format_pair_default;
+ h->format_pair_arg = 0;
+ }
+
+ return v;
+}
+
+void *
+_hash_free (void *v)
+{
+ hash_t *h = hash_header (v);
+ hash_pair_union_t *p;
+ uword i;
+
+ if (!v)
+ return v;
+
+ /* We zero all freed memory in case user would be tempted to use it. */
+ for (i = 0; i < hash_capacity (v); i++)
+ {
+ if (hash_is_user (v, i))
+ continue;
+ p = get_pair (v, i);
+ if (h->log2_pair_size == 0)
+ vec_free (p->indirect.pairs);
+ else if (p->indirect.pairs)
+ clib_mem_free (p->indirect.pairs);
+ }
+
+ vec_free_header (h);
+
+ return 0;
+}
+
+static void *
+hash_resize_internal (void *old, uword new_size, uword free_old)
+{
+ void *new;
+ hash_pair_t *p;
+
+ new = 0;
+ if (new_size > 0)
+ {
+ hash_t *h = old ? hash_header (old) : 0;
+ new = _hash_create (new_size, h);
+ /* *INDENT-OFF* */
+ hash_foreach_pair (p, old, {
+ new = _hash_set3 (new, p->key, &p->value[0], 0);
+ });
+ /* *INDENT-ON* */
+ }
+
+ if (free_old)
+ hash_free (old);
+ return new;
+}
+
+void *
+hash_resize (void *old, uword new_size)
+{
+ return hash_resize_internal (old, new_size, 1);
+}
+
+void *
+hash_dup (void *old)
+{
+ return hash_resize_internal (old, vec_len (old), 0);
+}
+
+void *
+_hash_set3 (void *v, uword key, void *value, void *old_value)
+{
+ hash_t *h;
+
+ if (!v)
+ v = hash_create (0, sizeof (uword));
+
+ h = hash_header (v);
+ (void) lookup (v, key, SET, value, old_value);
+
+ if (!(h->flags & HASH_FLAG_NO_AUTO_GROW))
+ {
+ /* Resize when 3/4 full. */
+ if (4 * (h->elts + 1) > 3 * vec_len (v))
+ v = hash_resize (v, 2 * vec_len (v));
+ }
+
+ return v;
+}
+
+uword
+vec_key_sum (hash_t * h, uword key)
+{
+ void *v = uword_to_pointer (key, void *);
+ return hash_memory (v, vec_len (v) * h->user, 0);
+}
+
+uword
+vec_key_equal (hash_t * h, uword key1, uword key2)
+{
+ void *v1 = uword_to_pointer (key1, void *);
+ void *v2 = uword_to_pointer (key2, void *);
+ uword l1 = vec_len (v1);
+ uword l2 = vec_len (v2);
+ return l1 == l2 && 0 == memcmp (v1, v2, l1 * h->user);
+}
+
+u8 *
+vec_key_format_pair (u8 * s, va_list * args)
+{
+ void *CLIB_UNUSED (user_arg) = va_arg (*args, void *);
+ void *v = va_arg (*args, void *);
+ hash_pair_t *p = va_arg (*args, hash_pair_t *);
+ hash_t *h = hash_header (v);
+ void *u = uword_to_pointer (p->key, void *);
+ int i;
+
+ switch (h->user)
+ {
+ case 1:
+ s = format (s, "%v", u);
+ break;
+
+ case 2:
+ {
+ u16 *w = u;
+ for (i = 0; i < vec_len (w); i++)
+ s = format (s, "0x%x, ", w[i]);
+ break;
+ }
+
+ case 4:
+ {
+ u32 *w = u;
+ for (i = 0; i < vec_len (w); i++)
+ s = format (s, "0x%x, ", w[i]);
+ break;
+ }
+
+ case 8:
+ {
+ u64 *w = u;
+ for (i = 0; i < vec_len (w); i++)
+ s = format (s, "0x%Lx, ", w[i]);
+ break;
+ }
+
+ default:
+ s = format (s, "0x%U", format_hex_bytes, u, vec_len (u) * h->user);
+ break;
+ }
+
+ if (hash_value_bytes (h) > 0)
+ s = format (s, " -> 0x%wx", p->value[0]);
+
+ return s;
+}
+
+uword
+mem_key_sum (hash_t * h, uword key)
+{
+ uword *v = uword_to_pointer (key, void *);
+ return hash_memory (v, h->user, 0);
+}
+
+uword
+mem_key_equal (hash_t * h, uword key1, uword key2)
+{
+ void *v1 = uword_to_pointer (key1, void *);
+ void *v2 = uword_to_pointer (key2, void *);
+ return v1 && v2 && 0 == memcmp (v1, v2, h->user);
+}
+
+uword
+string_key_sum (hash_t * h, uword key)
+{
+ char *v = uword_to_pointer (key, char *);
+ return hash_memory (v, strlen (v), 0);
+}
+
+uword
+string_key_equal (hash_t * h, uword key1, uword key2)
+{
+ void *v1 = uword_to_pointer (key1, void *);
+ void *v2 = uword_to_pointer (key2, void *);
+ return v1 && v2 && 0 == strcmp (v1, v2);
+}
+
+u8 *
+string_key_format_pair (u8 * s, va_list * args)
+{
+ void *CLIB_UNUSED (user_arg) = va_arg (*args, void *);
+ void *v = va_arg (*args, void *);
+ hash_pair_t *p = va_arg (*args, hash_pair_t *);
+ hash_t *h = hash_header (v);
+ void *u = uword_to_pointer (p->key, void *);
+
+ s = format (s, "%s", u);
+
+ if (hash_value_bytes (h) > 0)
+ s =
+ format (s, " -> 0x%8U", format_hex_bytes, &p->value[0],
+ hash_value_bytes (h));
+
+ return s;
+}
+
+static u8 *
+hash_format_pair_default (u8 * s, va_list * args)
+{
+ void *CLIB_UNUSED (user_arg) = va_arg (*args, void *);
+ void *v = va_arg (*args, void *);
+ hash_pair_t *p = va_arg (*args, hash_pair_t *);
+ hash_t *h = hash_header (v);
+
+ s = format (s, "0x%08x", p->key);
+ if (hash_value_bytes (h) > 0)
+ s =
+ format (s, " -> 0x%8U", format_hex_bytes, &p->value[0],
+ hash_value_bytes (h));
+ return s;
+}
+
+uword
+hash_bytes (void *v)
+{
+ uword i, bytes;
+ hash_t *h = hash_header (v);
+
+ if (!v)
+ return 0;
+
+ bytes = vec_capacity (v, hash_header_bytes (v));
+
+ for (i = 0; i < hash_capacity (v); i++)
+ {
+ if (!hash_is_user (v, i))
+ {
+ hash_pair_union_t *p = get_pair (v, i);
+ if (h->log2_pair_size > 0)
+ bytes += 1 << indirect_pair_get_log2_bytes (&p->indirect);
+ else
+ bytes += vec_capacity (p->indirect.pairs, 0);
+ }
+ }
+ return bytes;
+}
+
+u8 *
+format_hash (u8 * s, va_list * va)
+{
+ void *v = va_arg (*va, void *);
+ int verbose = va_arg (*va, int);
+ hash_pair_t *p;
+ hash_t *h = hash_header (v);
+ uword i;
+
+ s = format (s, "hash %p, %wd elts, capacity %wd, %wd bytes used,\n",
+ v, hash_elts (v), hash_capacity (v), hash_bytes (v));
+
+ {
+ uword *occupancy = 0;
+
+ /* Count number of buckets with each occupancy. */
+ for (i = 0; i < hash_capacity (v); i++)
+ {
+ uword j;
+
+ if (hash_is_user (v, i))
+ {
+ j = 1;
+ }
+ else
+ {
+ hash_pair_union_t *p = get_pair (v, i);
+ if (h->log2_pair_size > 0)
+ j = indirect_pair_get_len (&p->indirect);
+ else
+ j = vec_len (p->indirect.pairs);
+ }
+
+ vec_validate (occupancy, j);
+ occupancy[j]++;
+ }
+
+ s = format (s, " profile ");
+ for (i = 0; i < vec_len (occupancy); i++)
+ s = format (s, "%wd%c", occupancy[i],
+ i + 1 == vec_len (occupancy) ? '\n' : ' ');
+
+ s = format (s, " lookup # of compares: ");
+ for (i = 1; i < vec_len (occupancy); i++)
+ s = format (s, "%wd: .%03d%c", i,
+ (1000 * i * occupancy[i]) / hash_elts (v),
+ i + 1 == vec_len (occupancy) ? '\n' : ' ');
+
+ vec_free (occupancy);
+ }
+
+ if (verbose)
+ {
+ /* *INDENT-OFF* */
+ hash_foreach_pair (p, v, {
+ s = format (s, " %U\n", h->format_pair, h->format_pair_arg, v, p);
+ });
+ /* *INDENT-ON* */
+ }
+
+ return s;
+}
+
+static uword
+unformat_hash_string_internal (unformat_input_t * input,
+ va_list * va, int is_vec)
+{
+ uword *hash = va_arg (*va, uword *);
+ int *result = va_arg (*va, int *);
+ u8 *string = 0;
+ uword *p;
+
+ if (!unformat (input, is_vec ? "%v%_" : "%s%_", &string))
+ return 0;
+
+ p = hash_get_mem (hash, string);
+ if (p)
+ *result = *p;
+
+ vec_free (string);
+ return p ? 1 : 0;
+}
+
+uword
+unformat_hash_vec_string (unformat_input_t * input, va_list * va)
+{
+ return unformat_hash_string_internal (input, va, /* is_vec */ 1);
+}
+
+uword
+unformat_hash_string (unformat_input_t * input, va_list * va)
+{
+ return unformat_hash_string_internal (input, va, /* is_vec */ 0);
+}
+
+clib_error_t *
+hash_validate (void *v)
+{
+ hash_t *h = hash_header (v);
+ uword i, j;
+ uword *keys = 0;
+ clib_error_t *error = 0;
+
+#define CHECK(x) if ((error = ERROR_ASSERT (x))) goto done;
+
+ for (i = 0; i < hash_capacity (v); i++)
+ {
+ hash_pair_union_t *pu = get_pair (v, i);
+
+ if (hash_is_user (v, i))
+ {
+ CHECK (pu->direct.key != 0);
+ vec_add1 (keys, pu->direct.key);
+ }
+ else
+ {
+ hash_pair_t *p;
+ hash_pair_indirect_t *pi = &pu->indirect;
+ uword n;
+
+ n = h->log2_pair_size > 0
+ ? indirect_pair_get_len (pi) : vec_len (pi->pairs);
+
+ for (p = pi->pairs; n-- > 0; p = hash_forward1 (h, p))
+ {
+ /* Assert key uniqueness. */
+ for (j = 0; j < vec_len (keys); j++)
+ CHECK (keys[j] != p->key);
+ vec_add1 (keys, p->key);
+ }
+ }
+ }
+
+ CHECK (vec_len (keys) == h->elts);
+
+ vec_free (keys);
+done:
+ return error;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */