libcutils

libcutils/src/misc.c
misc.c
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1#include <cutils/misc.h>
2
3void sleep_ms(unsigned int milliseconds)
4{
5 #ifdef __unix__
6 usleep(milliseconds * 1000);
7 #endif
8 #ifdef _WIN32
9 Sleep(milliseconds);
10 #endif
11}
12
13int strcmp_nocase(const char* s1, const char* s2)
14{
15 const unsigned char* p1 = (const unsigned char*)s1;
16 const unsigned char* p2 = (const unsigned char*)s2;
17 unsigned char c1, c2;
18
19 do
20 {
21 c1 = (unsigned char)tolower(*p1++);
22 c2 = (unsigned char)tolower(*p2++);
23 if (c1 == '\0')
24 return c1 - c2;
25 }
26 while (c1 == c2);
27
28 return c1 - c2;
29}
30
31int strncmp_nocase(const char* s1, const char* s2, size_t n)
32{
33 const unsigned char* p1 = (const unsigned char*)s1;
34 const unsigned char* p2 = (const unsigned char*)s2;
35 unsigned char c1, c2;
36
37 if(n == 0)
38 return 0;
39
40 do
41 {
42 c1 = (unsigned char)tolower(*p1++);
43 c2 = (unsigned char)tolower(*p2++);
44 if (c1 == '\0')
45 return c1 - c2;
46 }
47 while (c1 == c2 && --n);
48
49 return c1 - c2;
50}
51
52#if __STDC_VERSION__ >= 199901L
53#ifdef UINT32_MAX
54uint32_t ntoh32(uint32_t const net)
55{
56 uint8_t data[4];
57 memcpy(&data, &net, sizeof(data));
58
59 return ((uint32_t) data[3] << 0)
60 | ((uint32_t) data[2] << 8)
61 | ((uint32_t) data[1] << 16)
62 | ((uint32_t) data[0] << 24);
63}
64#endif
65#endif
66
67#if __STDC_VERSION__ >= 201112L
68struct timespec timespec_diff(const struct timespec* old_ts, const struct timespec* new_ts)
69{
70 struct timespec diff;
71
72 if ((new_ts->tv_nsec - old_ts->tv_nsec) < 0)
73 {
74 diff.tv_sec = new_ts->tv_sec - old_ts->tv_sec - 1;
75 diff.tv_nsec = new_ts->tv_nsec - old_ts->tv_nsec + 1000000000;
76 } else {
77 diff.tv_sec = new_ts->tv_sec - old_ts->tv_sec;
78 diff.tv_nsec = new_ts->tv_nsec - old_ts->tv_nsec;
79 }
80
81 return diff;
82}
83
84struct timespec timespec_add(const struct timespec* ts_1, const struct timespec* ts_2)
85{
86 struct timespec res;
87
88 if (999999999 - ts_1->tv_nsec < ts_2->tv_nsec)
89 {
90 res.tv_sec = ts_1->tv_sec + ts_2->tv_sec + 1;
91 res.tv_nsec = ts_1->tv_nsec + (ts_2->tv_nsec - 1000000000) ;
92 } else {
93 res.tv_sec = ts_1->tv_sec + ts_2->tv_sec;
94 res.tv_nsec = ts_1->tv_nsec + ts_2->tv_nsec;
95 }
96
97 return res;
98}
99
100
101max_uint_t timespec_ms(const struct timespec* ts)
102{
103 return (max_uint_t)ts->tv_sec * 1000 + (max_uint_t)ts->tv_nsec/1000000;
104}
105#endif
106