|
7
|
1 /**
|
|
|
2 * utils.c:
|
|
|
3 *
|
|
|
4 * Useful utilities for general use.
|
|
|
5 **/
|
|
10
|
6 #include "utils.h"
|
|
|
7
|
|
|
8 #include <sysinfoapi.h>
|
|
11
|
9 #include <windef.h>
|
|
|
10 #include <winbase.h>
|
|
|
11 #include <winuser.h>
|
|
|
12 #include <stringapiset.h>
|
|
7
|
13 #include <stdint.h>
|
|
|
14
|
|
11
|
15 /* self explanatory. */
|
|
7
|
16 uint64_t get_system_time_in_milliseconds(void) {
|
|
|
17 FILETIME ft;
|
|
|
18 GetSystemTimeAsFileTime(&ft);
|
|
|
19 uint64_t ul = (uint64_t) ft.dwHighDateTime << 32 | ft.dwLowDateTime;
|
|
11
|
20 return ((ul - 116444736000000000ULL) * (1.0/10000000));
|
|
7
|
21 }
|
|
|
22
|
|
11
|
23 /*
|
|
|
24 * appends the contents of a UTF-8 string with the content of a wide string
|
|
|
25 *
|
|
|
26 * [in] LPCWSTR wstr, the wstring to append
|
|
|
27 * [out] LPSTR str, the utf-8 string to append to
|
|
|
28 * [in] size_t offset, an offset in bytes of `str` to append at
|
|
|
29 * [in] size_t size, the total size of `str` in bytes
|
|
|
30 *
|
|
|
31 * if the function fails, it returns 0.
|
|
|
32 * if the string is empty (i.e. str[0] == '\0'), this function returns 0.
|
|
|
33 * if the wide string is too large to be appended within `size`, it returns 0.
|
|
|
34 * on success, it returns the amount of characters written ***NOT INCLUDING THE
|
|
|
35 * NUL BYTE***.
|
|
|
36 */
|
|
|
37 size_t append_wstr_to_utf8(LPCWSTR wstr, LPSTR str, size_t offset, size_t size) {
|
|
|
38 if (!wstr || !str)
|
|
|
39 return 0;
|
|
7
|
40
|
|
11
|
41 const int wstr_len = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, wstr, -1, NULL, 0, NULL, NULL);
|
|
|
42 if (wstr_len < 0 || offset + wstr_len >= size)
|
|
|
43 return 0;
|
|
|
44
|
|
|
45 const int actual_len = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, wstr, -1, str + offset, wstr_len, NULL, NULL);
|
|
|
46 if (actual_len < 1)
|
|
|
47 return 0;
|
|
|
48
|
|
|
49 return actual_len - 1; // remove nul byte from offset
|
|
7
|
50 }
|
