install/strv.h

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