1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2
3 /* Fluent Bit
4 * ==========
5 * Copyright (C) 2019-2021 The Fluent Bit Authors
6 * Copyright (C) 2015-2018 Treasure Data Inc.
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 /*
22 * The following SDS interface is a clone/strip-down version of the original
23 * SDS library created by Antirez at https://github.com/antirez/sds.
24 */
25
26 #ifndef FLB_SDS_H
27 #define FLB_SDS_H
28
29 #include <fluent-bit/flb_info.h>
30 #include <fluent-bit/flb_macros.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <inttypes.h>
34
35 #define FLB_SDS_HEADER_SIZE (sizeof(uint64_t) + sizeof(uint64_t))
36
37 typedef char *flb_sds_t;
38
39 #pragma pack(push, 1)
40 struct flb_sds {
41 uint64_t len; /* used */
42 uint64_t alloc; /* excluding the header and null terminator */
43 char buf[];
44 };
45 #pragma pack(pop)
46
47 #define FLB_SDS_HEADER(s) ((struct flb_sds *) (s - FLB_SDS_HEADER_SIZE))
48
flb_sds_len(flb_sds_t s)49 static inline size_t flb_sds_len(flb_sds_t s)
50 {
51 return (size_t) FLB_SDS_HEADER(s)->len;
52 }
53
flb_sds_is_empty(flb_sds_t s)54 static inline int flb_sds_is_empty(flb_sds_t s)
55 {
56 if (flb_sds_len(s) == 0) {
57 return FLB_TRUE;
58 }
59
60 return FLB_FALSE;
61 }
62
flb_sds_len_set(flb_sds_t s,size_t len)63 static inline void flb_sds_len_set(flb_sds_t s, size_t len)
64 {
65 FLB_SDS_HEADER(s)->len = len;
66 }
67
flb_sds_alloc(flb_sds_t s)68 static inline size_t flb_sds_alloc(flb_sds_t s)
69 {
70 return (size_t) FLB_SDS_HEADER(s)->alloc;
71 }
72
flb_sds_avail(flb_sds_t s)73 static inline size_t flb_sds_avail(flb_sds_t s)
74 {
75 struct flb_sds *h;
76
77 h = FLB_SDS_HEADER(s);
78 return (size_t) (h->alloc - h->len);
79 }
80
flb_sds_cmp(flb_sds_t s,const char * str,int len)81 static inline int flb_sds_cmp(flb_sds_t s, const char *str, int len)
82 {
83 if (flb_sds_len(s) != len) {
84 return -1;
85 }
86
87 return strncmp(s, str, len);
88 }
89
flb_sds_casecmp(flb_sds_t s,const char * str,int len)90 static inline int flb_sds_casecmp(flb_sds_t s, const char *str, int len)
91 {
92 if (flb_sds_len(s) != len) {
93 return -1;
94 }
95
96 return strncasecmp(s, str, len);
97 }
98
99 flb_sds_t flb_sds_create(const char *str);
100 flb_sds_t flb_sds_create_len(const char *str, int len);
101 flb_sds_t flb_sds_create_size(size_t size);
102 flb_sds_t flb_sds_cat(flb_sds_t s, const char *str, int len);
103 flb_sds_t flb_sds_cat_esc(flb_sds_t s, const char *str, int len,
104 char *esc, size_t esc_size);
105 flb_sds_t flb_sds_cat_utf8(flb_sds_t *sds, const char *str, int len);
106 int flb_sds_cat_safe(flb_sds_t *buf, const char *str, int len);
107 flb_sds_t flb_sds_increase(flb_sds_t s, size_t len);
108 flb_sds_t flb_sds_copy(flb_sds_t s, const char *str, int len);
109 void flb_sds_destroy(flb_sds_t s);
110 flb_sds_t flb_sds_printf(flb_sds_t *sds, const char *fmt, ...);
111
112 #endif
113