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/*
* Copyright (c) 2016 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.
*/
#ifndef __BIER_BIT_STRING_H__
#define __BIER_BIT_STRING_H__
#include <vppinfra/byte_order.h>
#include <vppinfra/format.h>
#include <vnet/bier/bier_types.h>
#define BIER_BBS_LEN_TO_BUCKETS(_len) (_len)
#define BIER_BBS_LEN_TO_BITS(_len) (_len * 8)
#define BIER_BBS_LEN_TO_INTS(_len) ((_len) / sizeof(int))
#define BIER_BIT_MASK_BITS_PER_INT (sizeof(int) * 8)
/*
* bier_find_first_bit_set
*
* find the position of the first bit set in a long
*/
static inline int
bier_find_first_bit_string_set (int mask)
{
return (__builtin_ffs(clib_net_to_host_u32(mask)));
}
extern void bier_bit_string_set_bit(bier_bit_string_t *mask,
bier_bp_t bp);
extern void bier_bit_string_clear_bit(bier_bit_string_t *mask,
bier_bp_t bp);
extern u8 *format_bier_bit_string(u8 * s, va_list * args);
#define BIER_BBS_NUM_INT_BUCKETS(_bbs) \
(BIER_BBS_LEN_TO_BUCKETS(_bbs->bbs_len) / sizeof(int))
always_inline int
bier_bit_string_is_zero (const bier_bit_string_t *src)
{
u16 index;
for (index = 0;
index < BIER_BBS_NUM_INT_BUCKETS(src);
index++) {
if (((int*)src->bbs_buckets)[index] != 0) {
return (0);
}
}
return (1);
}
always_inline void
bier_bit_string_clear_string (const bier_bit_string_t *src,
bier_bit_string_t *dest)
{
u16 index;
ASSERT(src->bbs_len == dest->bbs_len);
for (index = 0;
index < BIER_BBS_NUM_INT_BUCKETS(src);
index++) {
((int*)dest->bbs_buckets)[index] &= ~(((int*)src->bbs_buckets)[index]);
}
}
always_inline void
bier_bit_string_logical_and_string (const bier_bit_string_t *src,
bier_bit_string_t *dest)
{
u16 index;
ASSERT(src->bbs_len == dest->bbs_len);
for (index = 0;
index < BIER_BBS_NUM_INT_BUCKETS(src);
index++) {
((int*)dest->bbs_buckets)[index] &= ((int*)src->bbs_buckets)[index];
}
}
always_inline void
bier_bit_string_init (bier_bit_string_t *bbs,
bier_hdr_len_id_t len,
bier_bit_mask_bucket_t *buckets)
{
bbs->bbs_len = bier_hdr_len_id_to_num_bytes(len);
bbs->bbs_buckets = buckets;
}
#endif
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