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maximum value of int
...
in C99 you can also use UINT64_MAX and INT64_MAX
– Dmitry Vyal
Oct 2 '13 at 9:08
3
...
What does static_assert do, and what would you use it for?
...ly occupy 32 bits of memory, leaving 16 of them unused (and thus the macro UINT_MAX would be equal to 65535). So the way you describe the first static assertion ("unsigned int object having exactly 32 bits") is misleading. To match your description, this assertion should be included as well : static...
Timer function to provide time in nano seconds using C++
...rors, and may yield incorrect timing values on certain processors)
inline uint64_t rdtsc()
{
uint32_t lo, hi;
__asm__ __volatile__ (
"xorl %%eax, %%eax\n"
"cpuid\n"
"rdtsc\n"
: "=a" (lo), "=d" (hi)
:
: "%ebx", "%ecx" );
return (uint64_t)hi << 32...
Convert interface{} to int
...== %T\n", t, t)
i = int(t) // standardizes across systems
case uint8:
fmt.Printf("%d == %T\n", t, t)
i = int(t) // standardizes across systems
case uint16:
fmt.Printf("%d == %T\n", t, t)
i = int(t) // standardizes across systems
case uint32:
...
Why unsigned integer is not available in PostgreSQL?
...additional constraint.
For an concrete example you could use
CREATE DOMAIN uint2 AS int4
CHECK(VALUE >= 0 AND VALUE < 65536);
Here is what psql gives when I try to abuse the type.
DS1=# select (346346 :: uint2);
ERROR: value for domain uint2 violates check constraint "uint2_check"
...
How to get current timestamp in milliseconds since 1970 just the way Java gets
...ast<milliseconds>(d)
translate std::chrono::milliseconds to integer (uint64_t to avoid overflow)
#include <chrono>
#include <cstdint>
#include <iostream>
uint64_t timeSinceEpochMillisec() {
using namespace std::chrono;
return duration_cast<milliseconds>(system_cl...
How to enumerate an enum with String type?
...orOfOne(unsafeBitCast((), T.self)))
case 1: cast = { unsafeBitCast(UInt8(truncatingBitPattern: $0), T.self) }
case 2: cast = { unsafeBitCast(UInt16(truncatingBitPattern: $0), T.self) }
case 4: cast = { unsafeBitCast(UInt32(truncatingBitPattern: $0), T.self) }
case 8: ...
How to have stored properties in Swift, the same way I had on Objective-C?
...roperties:
for Swift 1
import ObjectiveC
private var xoAssociationKey: UInt8 = 0
extension UIView {
var xo: PFObject! {
get {
return objc_getAssociatedObject(self, &xoAssociationKey) as? PFObject
}
set(newValue) {
objc_setAssociatedObject(...
How to count the number of set bits in a 32-bit integer?
...e, you may need to adjust it to work for a particular language (e.g. using uint32_t for C++ and >>> in Java):
int numberOfSetBits(uint32_t i)
{
// Java: use int, and use >>> instead of >>
// C or C++: use uint32_t
i = i - ((i >> 1) & 0x55555555);
...
How to Calculate Execution Time of a Code Snippet in C++
... if already defined */
typedef long long int64; typedef unsigned long long uint64;
/* Returns the amount of milliseconds elapsed since the UNIX epoch. Works on both
* windows and linux. */
uint64 GetTimeMs64()
{
#ifdef _WIN32
/* Windows */
FILETIME ft;
LARGE_INTEGER li;
/* Get the amount of ...