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Check substring exists in a string in C
...
My own humble (case sensitive) solution:
uint8_t strContains(char* string, char* toFind)
{
uint8_t slen = strlen(string);
uint8_t tFlen = strlen(toFind);
uint8_t found = 0;
if( slen >= tFlen )
{
for(uint8_t s=0, t=0; s<slen; s++)
...
Opening a folder in explorer and selecting a file
...e)]
public static extern int SHOpenFolderAndSelectItems(IntPtr pidlFolder, uint cidl, [In, MarshalAs(UnmanagedType.LPArray)] IntPtr[] apidl, uint dwFlags);
[DllImport("shell32.dll", SetLastError = true)]
public static extern void SHParseDisplayName([MarshalAs(UnmanagedType.LPWStr)] string name, Int...
What do 'real', 'user' and 'sys' mean in the output of time(1)?
...clude <stdio.h>
#include <stdlib.h>
#include <unistd.h>
uint64_t niters;
void* my_thread(void *arg) {
uint64_t *argument, i, result;
argument = (uint64_t *)arg;
result = *argument;
for (i = 0; i < niters; ++i) {
result = (result * result) - (3 * result)...
OnNotify函数 ON_NOTIFY消息总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...体的定义
typedef struct tagNMHDR
{
HWND hwndFrom;
UINT_PTR idFrom;
UINT code; // NM_ code
} NMHDR;
通过分析代码发现：
hwndFrom：必须有，声明消息来自哪个窗口。
idFrom：可有可无，声明窗口ID
code：具体的子消...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...ate is:
This shows the result of benchmark runs on the following code:
uint64_t do_Ndec(int thread, int loop_count)
{
uint64_t start;
uint64_t end;
int __d0;
asm volatile ("rdtsc\n\tshl $32, %%rdx\n\tor %%rdx, %0" : "=a" (start) : : "%rdx");
mutex.lock();
mutex.unlock();
asm volat...
Best way to test if a generic type is a string? (C#)
...of that class. IConvertible is implemented by Boolean, SByte, Byte, Int16, UInt16, Int32, UInt32, Int64, UInt64, Single, Double, Decimal, DateTime, Char, and String, so you can check for primitive types using this. More info on "Generic Type Checking".
...
Specifically, what's dangerous about casting the result of malloc?
...s both C and C++: #ifdef __cplusplus \nextern "C" { \n#endif static inline uint16_t swb(uint16_t a) {return ((a << 8) | ((a >> 8) & 0xFF); } \n#ifdef __cplusplus\n } \n#endif. Now, why you'd want to call malloc in a static inline function I really don't know, but headers which work i...
Generate random password string with requirements in javascript
...to && window.crypto.getRandomValues)
{
var result = new Uint8Array(1);
window.crypto.getRandomValues(result);
return result[0];
}
else if(window.msCrypto && window.msCrypto.getRandomValues)
{
var result = new Uint8Array(1);
window.msCry...
What is a rune?
..._compare.go
Output:
hello你好, type: string, len: 11
s[0]: 104, type: uint8
s[10]: 189, type: uint8
[104 101 108 108 111 20320 22909], type: []int32, len: 7
Explanation:
The string hello你好 has length 11, because first 5 chars each take 1 byte only, while the last 2 Chinese chars each t...
How to quickly check if folder is empty (.NET)?
...tial, CharSet = CharSet.Auto)]
private struct WIN32_FIND_DATA
{
public uint dwFileAttributes;
public System.Runtime.InteropServices.ComTypes.FILETIME ftCreationTime;
public System.Runtime.InteropServices.ComTypes.FILETIME ftLastAccessTime;
public System.Runtime.InteropServices.ComTyp...