src/basic/strv.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2010 Lennart Poettering
   8 ***/
   9
  10 #include <fnmatch.h>
  11 #include <stdarg.h>
  12 #include <stdbool.h>
  13 #include <stddef.h>
  14
  15 #include "alloc-util.h"
  16 #include "extract-word.h"
  17 #include "macro.h"
  18 #include "util.h"
  19
  20 char *strv_find(char **l, const char *name) _pure_;
  21 char *strv_find_prefix(char **l, const char *name) _pure_;
  22 char *strv_find_startswith(char **l, const char *name) _pure_;
  23
  24 char **strv_free(char **l);
  25 DEFINE_TRIVIAL_CLEANUP_FUNC(char**, strv_free);
  26 #define _cleanup_strv_free_ _cleanup_(strv_freep)
  27
  28 char **strv_free_erase(char **l);
  29 DEFINE_TRIVIAL_CLEANUP_FUNC(char**, strv_free_erase);
  30 #define _cleanup_strv_free_erase_ _cleanup_(strv_free_erasep)
  31
  32 void strv_clear(char **l);
  33
  34 char **strv_copy(char * const *l);
  35 unsigned strv_length(char * const *l) _pure_;
  36
  37 int strv_extend_strv(char ***a, char **b, bool filter_duplicates);
  38 int strv_extend_strv_concat(char ***a, char **b, const char *suffix);
  39 int strv_extend(char ***l, const char *value);
  40 int strv_extendf(char ***l, const char *format, ...) _printf_(2,0);
  41 int strv_extend_front(char ***l, const char *value);
  42 int strv_push(char ***l, char *value);
  43 int strv_push_pair(char ***l, char *a, char *b);
  44 int strv_insert(char ***l, unsigned position, char *value);
  45
  46 static inline int strv_push_prepend(char ***l, char *value) {
  47         return strv_insert(l, 0, value);
  48 }
  49
  50 int strv_consume(char ***l, char *value);
  51 int strv_consume_pair(char ***l, char *a, char *b);
  52 int strv_consume_prepend(char ***l, char *value);
  53
  54 char **strv_remove(char **l, const char *s);
  55 char **strv_uniq(char **l);
  56 bool strv_is_uniq(char **l);
  57
  58 bool strv_equal(char **a, char **b);
  59
  60 #define strv_contains(l, s) (!!strv_find((l), (s)))
  61
  62 char **strv_new(const char *x, ...) _sentinel_;
  63 char **strv_new_ap(const char *x, va_list ap);
  64
  65 #define STRV_IGNORE ((const char *) -1)
  66
  67 static inline const char* STRV_IFNOTNULL(const char *x) {
  68         return x ? x : STRV_IGNORE;
  69 }
  70
  71 static inline bool strv_isempty(char * const *l) {
  72         return !l || !*l;
  73 }
  74
  75 char **strv_split(const char *s, const char *separator);
  76 char **strv_split_newlines(const char *s);
  77
  78 int strv_split_extract(char ***t, const char *s, const char *separators, ExtractFlags flags);
  79
  80 char *strv_join(char **l, const char *separator);
  81
  82 char **strv_parse_nulstr(const char *s, size_t l);
  83 char **strv_split_nulstr(const char *s);
  84 int strv_make_nulstr(char **l, char **p, size_t *n);
  85
  86 bool strv_overlap(char **a, char **b) _pure_;
  87
  88 #define STRV_FOREACH(s, l)                      \
  89         for ((s) = (l); (s) && *(s); (s)++)
  90
  91 #define STRV_FOREACH_BACKWARDS(s, l)                                \
  92         for (s = ({                                                 \
  93                         char **_l = l;                              \
  94                         _l ? _l + strv_length(_l) - 1U : NULL;      \
  95                         });                                         \
  96              (l) && ((s) >= (l));                                   \
  97              (s)--)
  98
  99 #define STRV_FOREACH_PAIR(x, y, l)               \
 100         for ((x) = (l), (y) = (x+1); (x) && *(x) && *(y); (x) += 2, (y) = (x + 1))
 101
 102 char **strv_sort(char **l);
 103 void strv_print(char **l);
 104
 105 #define STRV_MAKE(...) ((char**) ((const char*[]) { __VA_ARGS__, NULL }))
 106
 107 #define STRV_MAKE_EMPTY ((char*[1]) { NULL })
 108
 109 #define strv_from_stdarg_alloca(first)                          \
 110         ({                                                      \
 111                 char **_l;                                      \
 112                                                                 \
 113                 if (!first)                                     \
 114                         _l = (char**) &first;                   \
 115                 else {                                          \
 116                         unsigned _n;                            \
 117                         va_list _ap;                            \
 118                                                                 \
 119                         _n = 1;                                 \
 120                         va_start(_ap, first);                   \
 121                         while (va_arg(_ap, char*))              \
 122                                 _n++;                           \
 123                         va_end(_ap);                            \
 124                                                                 \
 125                         _l = newa(char*, _n+1);                 \
 126                         _l[_n = 0] = (char*) first;             \
 127                         va_start(_ap, first);                   \
 128                         for (;;) {                              \
 129                                 _l[++_n] = va_arg(_ap, char*);  \
 130                                 if (!_l[_n])                    \
 131                                         break;                  \
 132                         }                                       \
 133                         va_end(_ap);                            \
 134                 }                                               \
 135                 _l;                                             \
 136         })
 137
 138 #define STR_IN_SET(x, ...) strv_contains(STRV_MAKE(__VA_ARGS__), x)
 139 #define STRPTR_IN_SET(x, ...)                                    \
 140         ({                                                       \
 141                 const char* _x = (x);                            \
 142                 _x && strv_contains(STRV_MAKE(__VA_ARGS__), _x); \
 143         })
 144
 145 #define FOREACH_STRING(x, ...)                               \
 146         for (char **_l = ({                                  \
 147                 char **_ll = STRV_MAKE(__VA_ARGS__);         \
 148                 x = _ll ? _ll[0] : NULL;                     \
 149                 _ll;                                         \
 150         });                                                  \
 151         _l && *_l;                                           \
 152         x = ({                                               \
 153                 _l ++;                                       \
 154                 _l[0];                                       \
 155         }))
 156
 157 char **strv_reverse(char **l);
 158 char **strv_shell_escape(char **l, const char *bad);
 159
 160 bool strv_fnmatch(char* const* patterns, const char *s, int flags);
 161
 162 static inline bool strv_fnmatch_or_empty(char* const* patterns, const char *s, int flags) {
 163         assert(s);
 164         return strv_isempty(patterns) ||
 165                strv_fnmatch(patterns, s, flags);
 166 }
 167
 168 char ***strv_free_free(char ***l);
 169 DEFINE_TRIVIAL_CLEANUP_FUNC(char***, strv_free_free);
 170
 171 char **strv_skip(char **l, size_t n);
 172
 173 int strv_extend_n(char ***l, const char *value, size_t n);
 174
 175 int fputstrv(FILE *f, char **l, const char *separator, bool *space);
 176
 177 #define strv_free_and_replace(a, b)             \
 178         ({                                      \
 179                 strv_free(a);                   \
 180                 (a) = (b);                      \
 181                 (b) = NULL;                     \
 182                 0;                              \
 183         })