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tree-wide: make new/new0/malloc_multiply/reallocarray safe for size 0
[thirdparty/systemd.git] / src / basic / strbuf.h
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2 #pragma once
3
4 #include <stddef.h>
5 #include <stdint.h>
6 #include <sys/types.h>
7
8 #include "macro.h"
9
10 struct strbuf {
11 char *buf;
12 size_t len;
13 struct strbuf_node *root;
14
15 size_t nodes_count;
16 size_t in_count;
17 size_t in_len;
18 size_t dedup_len;
19 size_t dedup_count;
20 };
21
22 struct strbuf_node {
23 size_t value_off;
24 size_t value_len;
25
26 struct strbuf_child_entry *children;
27 uint8_t children_count;
28 };
29
30 struct strbuf_child_entry {
31 uint8_t c;
32 struct strbuf_node *child;
33 };
34
35 struct strbuf *strbuf_new(void);
36 ssize_t strbuf_add_string(struct strbuf *str, const char *s, size_t len);
37 void strbuf_complete(struct strbuf *str);
38 void strbuf_cleanup(struct strbuf *str);
39 DEFINE_TRIVIAL_CLEANUP_FUNC(struct strbuf*, strbuf_cleanup);