src/basic/strv.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include <fnmatch.h>
   5 #include <stdarg.h>
   6 #include <stdbool.h>
   7 #include <stddef.h>
   8
   9 #include "alloc-util.h"
  10 #include "extract-word.h"
  11 #include "macro.h"
  12 #include "string-util.h"
  13 #include "util.h"
  14
  15 char *strv_find(char **l, const char *name) _pure_;
  16 char *strv_find_prefix(char **l, const char *name) _pure_;
  17 char *strv_find_startswith(char **l, const char *name) _pure_;
  18
  19 char **strv_free(char **l);
  20 DEFINE_TRIVIAL_CLEANUP_FUNC(char**, strv_free);
  21 #define _cleanup_strv_free_ _cleanup_(strv_freep)
  22
  23 char **strv_free_erase(char **l);
  24 DEFINE_TRIVIAL_CLEANUP_FUNC(char**, strv_free_erase);
  25 #define _cleanup_strv_free_erase_ _cleanup_(strv_free_erasep)
  26
  27 void strv_clear(char **l);
  28
  29 char **strv_copy(char * const *l);
  30 size_t strv_length(char * const *l) _pure_;
  31
  32 int strv_extend_strv(char ***a, char **b, bool filter_duplicates);
  33 int strv_extend_strv_concat(char ***a, char **b, const char *suffix);
  34 int strv_extend(char ***l, const char *value);
  35 int strv_extendf(char ***l, const char *format, ...) _printf_(2,0);
  36 int strv_extend_front(char ***l, const char *value);
  37 int strv_push(char ***l, char *value);
  38 int strv_push_pair(char ***l, char *a, char *b);
  39 int strv_insert(char ***l, size_t position, char *value);
  40
  41 static inline int strv_push_prepend(char ***l, char *value) {
  42         return strv_insert(l, 0, value);
  43 }
  44
  45 int strv_consume(char ***l, char *value);
  46 int strv_consume_pair(char ***l, char *a, char *b);
  47 int strv_consume_prepend(char ***l, char *value);
  48
  49 char **strv_remove(char **l, const char *s);
  50 char **strv_uniq(char **l);
  51 bool strv_is_uniq(char **l);
  52
  53 bool strv_equal(char **a, char **b);
  54
  55 #define strv_contains(l, s) (!!strv_find((l), (s)))
  56
  57 char **strv_new_internal(const char *x, ...) _sentinel_;
  58 char **strv_new_ap(const char *x, va_list ap);
  59 #define strv_new(...) strv_new_internal(__VA_ARGS__, NULL)
  60
  61 #define STRV_IGNORE ((const char *) -1)
  62
  63 static inline const char* STRV_IFNOTNULL(const char *x) {
  64         return x ? x : STRV_IGNORE;
  65 }
  66
  67 static inline bool strv_isempty(char * const *l) {
  68         return !l || !*l;
  69 }
  70
  71 char **strv_split_full(const char *s, const char *separator, SplitFlags flags);
  72 static inline char **strv_split(const char *s, const char *separator) {
  73         return strv_split_full(s, separator, 0);
  74 }
  75 char **strv_split_newlines(const char *s);
  76
  77 int strv_split_extract(char ***t, const char *s, const char *separators, ExtractFlags flags);
  78
  79 char *strv_join_prefix(char **l, const char *separator, const char *prefix);
  80 static inline char *strv_join(char **l, const char *separator) {
  81         return strv_join_prefix(l, separator, NULL);
  82 }
  83
  84 char **strv_parse_nulstr(const char *s, size_t l);
  85 char **strv_split_nulstr(const char *s);
  86 int strv_make_nulstr(char **l, char **p, size_t *n);
  87
  88 bool strv_overlap(char **a, char **b) _pure_;
  89
  90 #define STRV_FOREACH(s, l)                      \
  91         for ((s) = (l); (s) && *(s); (s)++)
  92
  93 #define STRV_FOREACH_BACKWARDS(s, l)                                \
  94         for (s = ({                                                 \
  95                         char **_l = l;                              \
  96                         _l ? _l + strv_length(_l) - 1U : NULL;      \
  97                         });                                         \
  98              (l) && ((s) >= (l));                                   \
  99              (s)--)
 100
 101 #define STRV_FOREACH_PAIR(x, y, l)               \
 102         for ((x) = (l), (y) = (x+1); (x) && *(x) && *(y); (x) += 2, (y) = (x + 1))
 103
 104 char **strv_sort(char **l);
 105 void strv_print(char **l);
 106
 107 #define STRV_MAKE(...) ((char**) ((const char*[]) { __VA_ARGS__, NULL }))
 108
 109 #define STRV_MAKE_EMPTY ((char*[1]) { NULL })
 110
 111 #define strv_from_stdarg_alloca(first)                          \
 112         ({                                                      \
 113                 char **_l;                                      \
 114                                                                 \
 115                 if (!first)                                     \
 116                         _l = (char**) &first;                   \
 117                 else {                                          \
 118                         size_t _n;                              \
 119                         va_list _ap;                            \
 120                                                                 \
 121                         _n = 1;                                 \
 122                         va_start(_ap, first);                   \
 123                         while (va_arg(_ap, char*))              \
 124                                 _n++;                           \
 125                         va_end(_ap);                            \
 126                                                                 \
 127                         _l = newa(char*, _n+1);                 \
 128                         _l[_n = 0] = (char*) first;             \
 129                         va_start(_ap, first);                   \
 130                         for (;;) {                              \
 131                                 _l[++_n] = va_arg(_ap, char*);  \
 132                                 if (!_l[_n])                    \
 133                                         break;                  \
 134                         }                                       \
 135                         va_end(_ap);                            \
 136                 }                                               \
 137                 _l;                                             \
 138         })
 139
 140 #define STR_IN_SET(x, ...) strv_contains(STRV_MAKE(__VA_ARGS__), x)
 141 #define STRPTR_IN_SET(x, ...)                                    \
 142         ({                                                       \
 143                 const char* _x = (x);                            \
 144                 _x && strv_contains(STRV_MAKE(__VA_ARGS__), _x); \
 145         })
 146
 147 #define FOREACH_STRING(x, ...)                               \
 148         for (char **_l = ({                                  \
 149                 char **_ll = STRV_MAKE(__VA_ARGS__);         \
 150                 x = _ll ? _ll[0] : NULL;                     \
 151                 _ll;                                         \
 152         });                                                  \
 153         _l && *_l;                                           \
 154         x = ({                                               \
 155                 _l ++;                                       \
 156                 _l[0];                                       \
 157         }))
 158
 159 char **strv_reverse(char **l);
 160 char **strv_shell_escape(char **l, const char *bad);
 161
 162 bool strv_fnmatch(char* const* patterns, const char *s, int flags);
 163
 164 static inline bool strv_fnmatch_or_empty(char* const* patterns, const char *s, int flags) {
 165         assert(s);
 166         return strv_isempty(patterns) ||
 167                strv_fnmatch(patterns, s, flags);
 168 }
 169
 170 char ***strv_free_free(char ***l);
 171 DEFINE_TRIVIAL_CLEANUP_FUNC(char***, strv_free_free);
 172
 173 char **strv_skip(char **l, size_t n);
 174
 175 int strv_extend_n(char ***l, const char *value, size_t n);
 176
 177 int fputstrv(FILE *f, char **l, const char *separator, bool *space);
 178
 179 #define strv_free_and_replace(a, b)             \
 180         ({                                      \
 181                 strv_free(a);                   \
 182                 (a) = (b);                      \
 183                 (b) = NULL;                     \
 184                 0;                              \
 185         })