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git.ipfire.org Git - thirdparty/kmod.git/blob - shared/util.h
12 #include <shared/macro.h>
14 /* string handling functions and memory allocations */
15 /* ************************************************************************ */
16 #define streq(a, b) (strcmp((a), (b)) == 0)
17 #define strstartswith(a, b) (strncmp(a, b, strlen(b)) == 0)
18 char *strchr_replace(char *s
, char c
, char r
);
19 void *memdup(const void *p
, size_t n
) __attribute__((nonnull(1)));
21 /* module-related functions */
22 /* ************************************************************************ */
23 #define KMOD_EXTENSION_UNCOMPRESSED ".ko"
25 int alias_normalize(const char *alias
, char buf
[static PATH_MAX
], size_t *len
) _must_check_
__attribute__((nonnull(1,2)));
26 int underscores(char *s
) _must_check_
;
27 char *modname_normalize(const char *modname
, char buf
[static PATH_MAX
], size_t *len
) __attribute__((nonnull(1, 2)));
28 char *path_to_modname(const char *path
, char buf
[static PATH_MAX
], size_t *len
) __attribute__((nonnull(2)));
29 bool path_ends_with_kmod_ext(const char *path
, size_t len
) __attribute__((nonnull(1)));
31 /* read-like and fread-like functions */
32 /* ************************************************************************ */
33 ssize_t
read_str_safe(int fd
, char *buf
, size_t buflen
) _must_check_
__attribute__((nonnull(2)));
34 ssize_t
write_str_safe(int fd
, const char *buf
, size_t buflen
) __attribute__((nonnull(2)));
35 int read_str_long(int fd
, long *value
, int base
) _must_check_
__attribute__((nonnull(2)));
36 int read_str_ulong(int fd
, unsigned long *value
, int base
) _must_check_
__attribute__((nonnull(2)));
37 char *freadline_wrapped(FILE *fp
, unsigned int *linenum
) __attribute__((nonnull(1)));
39 /* path handling functions */
40 /* ************************************************************************ */
41 bool path_is_absolute(const char *p
) _must_check_
__attribute__((nonnull(1)));
42 char *path_make_absolute_cwd(const char *p
) _must_check_
__attribute__((nonnull(1)));
43 int mkdir_p(const char *path
, int len
, mode_t mode
);
44 int mkdir_parents(const char *path
, mode_t mode
);
45 unsigned long long stat_mstamp(const struct stat
*st
);
47 /* time-related functions
48 * ************************************************************************ */
49 #define USEC_PER_SEC 1000000ULL
50 #define USEC_PER_MSEC 1000ULL
51 #define MSEC_PER_SEC 1000ULL
52 #define NSEC_PER_MSEC 1000000ULL
54 unsigned long long ts_usec(const struct timespec
*ts
);
55 unsigned long long ts_msec(const struct timespec
*ts
);
56 unsigned long long now_usec(void);
57 unsigned long long now_msec(void);
58 int sleep_until_msec(unsigned long long msec
);
59 unsigned long long get_backoff_delta_msec(unsigned long long t0
,
60 unsigned long long tend
,
61 unsigned long long *delta
);
64 /* endianess and alignments */
65 /* ************************************************************************ */
66 #define get_unaligned(ptr) \
68 struct __attribute__((packed)) { \
70 } *__p = (typeof(__p)) (ptr); \
74 #define put_unaligned(val, ptr) \
76 struct __attribute__((packed)) { \
78 } *__p = (typeof(__p)) (ptr); \
82 static _always_inline_
unsigned int ALIGN_POWER2(unsigned int u
)
84 return 1 << ((sizeof(u
) * 8) - __builtin_clz(u
- 1));
88 /* ************************************************************************ */
89 static inline void freep(void *p
) {
92 #define _cleanup_free_ _cleanup_(freep)
94 static inline bool addu64_overflow(uint64_t a
, uint64_t b
, uint64_t *res
)
96 #if (HAVE___BUILTIN_UADDL_OVERFLOW && HAVE___BUILTIN_UADDLL_OVERFLOW)
97 #if __SIZEOF_LONG__ == 8
98 return __builtin_uaddl_overflow(a
, b
, res
);
99 #elif __SIZEOF_LONG_LONG__ == 8
100 return __builtin_uaddll_overflow(a
, b
, res
);
102 #error "sizeof(long long) != 8"
106 return UINT64_MAX
- a
< b
;