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systemd/src/basic/nulstr-util.h
T
Arnaud Ferraris 533f11c529 basic: nulstr-util: add nulstr_get() returning the matching string
Currently `nulstr_contains` returns a boolean, making it difficult to
identify which of the input strings matches the "needle".

Adding a new `nulstr_get()` function, returning a const pointer to the
matching string, eases this process and allows us to directly re-use the
result of a call to this function without additional processing or
memory allocation.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
2021-09-15 16:45:58 +02:00

18 lines
610 B
C

/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <stdbool.h>
#include <string.h>
#define NULSTR_FOREACH(i, l) \
for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
#define NULSTR_FOREACH_PAIR(i, j, l) \
for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
const char* nulstr_get(const char *nulstr, const char *needle);
static inline bool nulstr_contains(const char *nulstr, const char *needle) {
return nulstr_get(nulstr, needle);
}