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When would anyone use a union? Is it a remnant from the C-only days?
...use case I can think of is this:
typedef union
{
struct
{
uint8_t a;
uint8_t b;
uint8_t c;
uint8_t d;
};
uint32_t x;
} some32bittype;
You can then access the 8-bit separate parts of that 32-bit block of data; however, prepare to potentially be bitte...
How to call C from Swift?
...t zlib
public class Zlib {
public class func zlibCompileFlags() -> UInt {
return zlib.zlibCompileFlags()
}
}
You don't have to put the zlib library name in front, except in the above case I named the Swift class func the same as the C function, and without the qualification the...
Inserting a tab character into text using C#
... private static extern IntPtr SendMessage(IntPtr h, int msg, int wParam, uint[] lParam);
private const int EM_SETTABSTOPS = 0x00CB;
private const char vbTab = '\t';
public Form1()
{
InitializeComponent();
var tabs = new uint[] { 25 * 4 };
...
How do I shuffle an array in Swift?
...tartIndex ..< endIndex - 1 {
let j = Int(arc4random_uniform(UInt32(count - i))) + i
guard i != j else { continue }
swap(&self[i], &self[j])
}
}
}
extension CollectionType {
/// Return a copy of `self` with its elements shuffled.
fun...
How To Test if Type is Primitive
...ariations one by one.
Edit 3: IsPrimitive = (Boolean, Byte, SByte, Int16, UInt16, Int32, UInt32, Int64, UInt64, IntPtr, UIntPtr, Char, Double, and Single),
Anther Primitive-Like type to check (t == typeof(DateTime))
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How do I achieve the theoretical maximum of 4 FLOPs per cycle?
...#include <iostream>
using namespace std;
typedef unsigned long long uint64;
double test_dp_mac_SSE(double x,double y,uint64 iterations){
register __m128d r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,rA,rB,rC,rD,rE,rF;
// Generate starting data.
r0 = _mm_set1_pd(x);
r1 = _mm_set1_pd(y);
...
Trying to login to RDP using AS3
...t forward, write zeroes manually
dataBuffer.writeShort(0xca01); // out_uint16_le(s, 0xca01);
dataBuffer.writeShort(1);
if (true) //Options.use_rdp5)
{
dataBuffer.writeInt(0); // out_uint32(s, 0);
dataBuffer.writeByte(24); // out_uint8(s, g_server_bpp);
dataBuf...
How to get the Power of some Integer in Swift language?
...xample I've used a generic T: BinaryInteger. This is so you can use Int or UInt or any other integer-like type.
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Hidden features of C
...
int8_t
int16_t
int32_t
uint8_t
uint16_t
uint32_t
These are an optional item in the standard, but it must be a hidden feature, because people are constantly redefining them. One code base I've worked on (and still do, for now) has multiple redefi...
What is the strict aliasing rule?
...work msg) onto a buffer of the word size of your system (like a pointer to uint32_ts or uint16_ts). When you overlay a struct onto such a buffer, or a buffer onto such a struct through pointer casting you can easily violate strict aliasing rules.
So in this kind of setup, if I want to send a message...