1 #pragma once
2
3 #include <inttypes.h>
4 #include <limits.h>
5 #include <stdbool.h>
6 #include <stdlib.h>
7 #include <stdio.h>
8 #include <sys/types.h>
9 #include <sys/stat.h>
10 #include <time.h>
11
12 #include <shared/macro.h>
13
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)));
20
21 /* module-related functions */
22 /* ************************************************************************ */
23 #define KMOD_EXTENSION_UNCOMPRESSED ".ko"
24
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)));
30
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)));
38
39 /* path handling functions */
40 /* ************************************************************************ */
41 char *path_make_absolute_cwd(const char *p) _must_check_ __attribute__((nonnull(1)));
42 int mkdir_p(const char *path, int len, mode_t mode);
43 int mkdir_parents(const char *path, mode_t mode);
44 unsigned long long stat_mstamp(const struct stat *st);
45
46 /* time-related functions
47 * ************************************************************************ */
48 #define USEC_PER_SEC 1000000ULL
49 #define USEC_PER_MSEC 1000ULL
50 #define MSEC_PER_SEC 1000ULL
51 #define NSEC_PER_MSEC 1000000ULL
52
53 unsigned long long now_usec(void);
54 unsigned long long now_msec(void);
55 int sleep_until_msec(unsigned long long msec);
56 unsigned long long get_backoff_delta_msec(unsigned long long t0,
57 unsigned long long tend,
58 unsigned long long *delta);
59
60
61 /* endianess and alignments */
62 /* ************************************************************************ */
63 #define get_unaligned(ptr) \
64 ({ \
65 struct __attribute__((packed)) { \
66 typeof(*(ptr)) __v; \
67 } *__p = (typeof(__p)) (ptr); \
68 __p->__v; \
69 })
70
71 #define put_unaligned(val, ptr) \
72 do { \
73 struct __attribute__((packed)) { \
74 typeof(*(ptr)) __v; \
75 } *__p = (typeof(__p)) (ptr); \
76 __p->__v = (val); \
77 } while(0)
78
ALIGN_POWER2(unsigned int u)79 static _always_inline_ unsigned int ALIGN_POWER2(unsigned int u)
80 {
81 return 1 << ((sizeof(u) * 8) - __builtin_clz(u - 1));
82 }
83
84 /* misc */
85 /* ************************************************************************ */
freep(void * p)86 static inline void freep(void *p) {
87 free(*(void**) p);
88 }
89 #define _cleanup_free_ _cleanup_(freep)
90
addu64_overflow(uint64_t a,uint64_t b,uint64_t * res)91 static inline bool addu64_overflow(uint64_t a, uint64_t b, uint64_t *res)
92 {
93 #if (HAVE___BUILTIN_UADDL_OVERFLOW && HAVE___BUILTIN_UADDLL_OVERFLOW)
94 #if __SIZEOF_LONG__ == 8
95 return __builtin_uaddl_overflow(a, b, res);
96 #elif __SIZEOF_LONG_LONG__ == 8
97 return __builtin_uaddll_overflow(a, b, res);
98 #else
99 #error "sizeof(long long) != 8"
100 #endif
101 #endif
102 *res = a + b;
103 return UINT64_MAX - a < b;
104 }
105