/* * 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_BUKCETS(_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_BUKCETS(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_BUKCETS(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_BUKCETS(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