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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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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...
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...