src/basic/util.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include <stdint.h>
   5
   6 #include "macro.h"
   7
   8 static inline const char* yes_no(bool b) {
   9         return b ? "yes" : "no";
  10 }
  11
  12 static inline const char* true_false(bool b) {
  13         return b ? "true" : "false";
  14 }
  15
  16 static inline const char* one_zero(bool b) {
  17         return b ? "1" : "0";
  18 }
  19
  20 static inline const char* enable_disable(bool b) {
  21         return b ? "enable" : "disable";
  22 }
  23
  24 extern int saved_argc;
  25 extern char **saved_argv;
  26
  27 static inline void save_argc_argv(int argc, char **argv) {
  28         saved_argc = argc;
  29         saved_argv = argv;
  30 }
  31
  32 bool kexec_loaded(void);
  33
  34 int prot_from_flags(int flags) _const_;
  35
  36 bool in_initrd(void);
  37 void in_initrd_force(bool value);
  38
  39 int on_ac_power(void);
  40
  41 static inline unsigned u64log2(uint64_t n) {
  42 #if __SIZEOF_LONG_LONG__ == 8
  43         return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
  44 #else
  45 #error "Wut?"
  46 #endif
  47 }
  48
  49 static inline unsigned u32ctz(uint32_t n) {
  50 #if __SIZEOF_INT__ == 4
  51         return n != 0 ? __builtin_ctz(n) : 32;
  52 #else
  53 #error "Wut?"
  54 #endif
  55 }
  56
  57 static inline unsigned log2i(int x) {
  58         assert(x > 0);
  59
  60         return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
  61 }
  62
  63 static inline unsigned log2u(unsigned x) {
  64         assert(x > 0);
  65
  66         return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
  67 }
  68
  69 static inline unsigned log2u_round_up(unsigned x) {
  70         assert(x > 0);
  71
  72         if (x == 1)
  73                 return 0;
  74
  75         return log2u(x - 1) + 1;
  76 }
  77
  78 int container_get_leader(const char *machine, pid_t *pid);
  79
  80 int version(void);
  81
  82 int str_verscmp(const char *s1, const char *s2);
  83
  84 void disable_coredumps(void);