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https://github.com/openvswitch/ovs
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b16270e69b
Add SHORT version of SAFE loop macros and overload the current macro name to keep backwards compatibility. Acked-by: Dumitru Ceara <dceara@redhat.com> Acked-by: Eelco Chaudron <echaudro@redhat.com> Signed-off-by: Adrian Moreno <amorenoz@redhat.com> Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
135 lines
4.5 KiB
C
135 lines
4.5 KiB
C
/*
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* Copyright (c) 2011, 2012, 2013, 2015, 2016 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SSET_H
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#define SSET_H
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#include "openvswitch/hmap.h"
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#include "util.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct sset_node {
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struct hmap_node hmap_node;
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char name[1];
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};
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/* A set of strings. */
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struct sset {
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struct hmap map;
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};
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#define SSET_INITIALIZER(SSET) { HMAP_INITIALIZER(&(SSET)->map) }
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/* Basics. */
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void sset_init(struct sset *);
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void sset_destroy(struct sset *);
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void sset_clone(struct sset *, const struct sset *);
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void sset_swap(struct sset *, struct sset *);
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void sset_moved(struct sset *);
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/* String parsing and formatting. */
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void sset_from_delimited_string(struct sset *, const char *s,
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const char *delimiters);
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char *sset_join(const struct sset *,
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const char *delimiter, const char *terminator);
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/* Count. */
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bool sset_is_empty(const struct sset *);
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size_t sset_count(const struct sset *);
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/* Insertion. */
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struct sset_node *sset_add(struct sset *, const char *);
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struct sset_node *sset_add_and_free(struct sset *, char *);
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void sset_add_assert(struct sset *, const char *);
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void sset_add_array(struct sset *, char **, size_t n);
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/* Deletion. */
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void sset_clear(struct sset *);
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void sset_delete(struct sset *, struct sset_node *);
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bool sset_find_and_delete(struct sset *, const char *);
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void sset_find_and_delete_assert(struct sset *, const char *);
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char *sset_pop(struct sset *);
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/* Search. */
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struct sset_node *sset_find(const struct sset *, const char *);
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bool sset_contains(const struct sset *, const char *);
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bool sset_equals(const struct sset *, const struct sset *);
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struct sset_position {
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struct hmap_position pos;
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};
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struct sset_node *sset_at_position(const struct sset *,
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struct sset_position *);
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/* Set operations. */
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void sset_intersect(struct sset *, const struct sset *);
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/* Iteration macros. */
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#define SSET_FOR_EACH(NAME, SSET) \
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for ((NAME) = SSET_FIRST(SSET); \
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NAME != NULL; \
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(NAME) = SSET_NEXT(SSET, NAME))
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#define SSET_FOR_EACH_SAFE_LONG(NAME, NEXT, SSET) \
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for ((NAME) = SSET_FIRST(SSET); \
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(NAME != NULL \
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? (NEXT) = SSET_NEXT(SSET, NAME), true \
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: false); \
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(NAME) = (NEXT))
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#define SSET_FOR_EACH_SAFE_SHORT(NAME, SSET) \
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for (const char * NAME__next = \
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((NAME) = SSET_FIRST(SSET), NULL); \
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(NAME != NULL \
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? (NAME__next = SSET_NEXT(SSET, NAME), true) \
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: (NAME__next = NULL, false)); \
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(NAME) = NAME__next)
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#define SSET_FOR_EACH_SAFE(...) \
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OVERLOAD_SAFE_MACRO(SSET_FOR_EACH_SAFE_LONG, \
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SSET_FOR_EACH_SAFE_SHORT, \
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3, __VA_ARGS__)
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const char **sset_array(const struct sset *);
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const char **sset_sort(const struct sset *);
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/* Implementation helper macros. */
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#define SSET_NODE_FROM_HMAP_NODE(HMAP_NODE) \
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CONTAINER_OF(HMAP_NODE, struct sset_node, hmap_node)
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#define SSET_NAME_FROM_HMAP_NODE(HMAP_NODE) \
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HMAP_NODE == NULL \
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? NULL \
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: (CONST_CAST(const char *, (SSET_NODE_FROM_HMAP_NODE(HMAP_NODE)->name)))
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#define SSET_NODE_FROM_NAME(NAME) CONTAINER_OF(NAME, struct sset_node, name)
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#define SSET_FIRST(SSET) \
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(BUILD_ASSERT_TYPE(SSET, struct sset *), \
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SSET_NAME_FROM_HMAP_NODE(hmap_first(&(SSET)->map)))
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#define SSET_NEXT(SSET, NAME) \
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(BUILD_ASSERT_TYPE(SSET, struct sset *), \
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SSET_NAME_FROM_HMAP_NODE( \
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hmap_next(&(SSET)->map, &SSET_NODE_FROM_NAME(NAME)->hmap_node)))
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#ifdef __cplusplus
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}
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#endif
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#endif /* sset.h */
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