chiark / gitweb /
nss-util: be a tiny bit more compatible with glibc's lookup behaviour regarding IPv6
[elogind.git] / src / shared / strv.h
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 #pragma once
4
5 /***
6   This file is part of systemd.
7
8   Copyright 2010 Lennart Poettering
9
10   systemd is free software; you can redistribute it and/or modify it
11   under the terms of the GNU Lesser General Public License as published by
12   the Free Software Foundation; either version 2.1 of the License, or
13   (at your option) any later version.
14
15   systemd is distributed in the hope that it will be useful, but
16   WITHOUT ANY WARRANTY; without even the implied warranty of
17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18   Lesser General Public License for more details.
19
20   You should have received a copy of the GNU Lesser General Public License
21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 ***/
23
24 #include <stdarg.h>
25 #include <stdbool.h>
26
27 #include "util.h"
28
29 char *strv_find(char **l, const char *name) _pure_;
30 char *strv_find_prefix(char **l, const char *name) _pure_;
31
32 void strv_free(char **l);
33 DEFINE_TRIVIAL_CLEANUP_FUNC(char**, strv_free);
34 #define _cleanup_strv_free_ _cleanup_(strv_freep)
35
36 char **strv_copy(char * const *l);
37 unsigned strv_length(char * const *l) _pure_;
38
39 int strv_extend_strv(char ***a, char **b);
40 int strv_extend_strv_concat(char ***a, char **b, const char *suffix);
41 int strv_extend(char ***l, const char *value);
42 int strv_extendf(char ***l, const char *format, ...) _printf_(2,0);
43 int strv_push(char ***l, char *value);
44 int strv_push_prepend(char ***l, char *value);
45 int strv_consume(char ***l, char *value);
46 int strv_consume_prepend(char ***l, char *value);
47
48 char **strv_remove(char **l, const char *s);
49 char **strv_uniq(char **l);
50
51 #define strv_contains(l, s) (!!strv_find((l), (s)))
52
53 char **strv_new(const char *x, ...) _sentinel_;
54 char **strv_new_ap(const char *x, va_list ap);
55
56 static inline const char* STRV_IFNOTNULL(const char *x) {
57         return x ? x : (const char *) -1;
58 }
59
60 static inline bool strv_isempty(char * const *l) {
61         return !l || !*l;
62 }
63
64 char **strv_split(const char *s, const char *separator);
65 char **strv_split_quoted(const char *s);
66 char **strv_split_newlines(const char *s);
67
68 char *strv_join(char **l, const char *separator);
69 char *strv_join_quoted(char **l);
70
71 char **strv_parse_nulstr(const char *s, size_t l);
72 char **strv_split_nulstr(const char *s);
73
74 bool strv_overlap(char **a, char **b) _pure_;
75
76 #define STRV_FOREACH(s, l)                      \
77         for ((s) = (l); (s) && *(s); (s)++)
78
79 #define STRV_FOREACH_BACKWARDS(s, l)            \
80         STRV_FOREACH(s, l)                      \
81                 ;                               \
82         for ((s)--; (l) && ((s) >= (l)); (s)--)
83
84 #define STRV_FOREACH_PAIR(x, y, l)               \
85         for ((x) = (l), (y) = (x+1); (x) && *(x) && *(y); (x) += 2, (y) = (x + 1))
86
87 char **strv_sort(char **l);
88 void strv_print(char **l);
89
90 #define STRV_MAKE(...) ((char**) ((const char*[]) { __VA_ARGS__, NULL }))
91
92 #define STRV_MAKE_EMPTY ((char*[1]) { NULL })
93
94 #define strv_from_stdarg_alloca(first)                          \
95         ({                                                      \
96                 char **_l;                                      \
97                                                                 \
98                 if (!first)                                     \
99                         _l = (char**) &first;                   \
100                 else {                                          \
101                         unsigned _n;                            \
102                         va_list _ap;                            \
103                                                                 \
104                         _n = 1;                                 \
105                         va_start(_ap, first);                   \
106                         while (va_arg(_ap, char*))              \
107                                 _n++;                           \
108                         va_end(_ap);                            \
109                                                                 \
110                         _l = newa(char*, _n+1);                 \
111                         _l[_n = 0] = (char*) first;             \
112                         va_start(_ap, first);                   \
113                         for (;;) {                              \
114                                 _l[++_n] = va_arg(_ap, char*);  \
115                                 if (!_l[_n])                    \
116                                         break;                  \
117                         }                                       \
118                         va_end(_ap);                            \
119                 }                                               \
120                 _l;                                             \
121         })
122
123 #define STR_IN_SET(x, ...) strv_contains(STRV_MAKE(__VA_ARGS__), x)
124
125 #define FOREACH_STRING(x, ...)                               \
126         for (char **_l = ({                                  \
127                 char **_ll = STRV_MAKE(__VA_ARGS__);         \
128                 x = _ll ? _ll[0] : NULL;                     \
129                 _ll;                                         \
130         });                                                  \
131         _l && *_l;                                           \
132         x = ({                                               \
133                 _l ++;                                       \
134                 _l[0];                                       \
135         }))