bitwise-operators Questions
9
Solved
Apple sometimes uses the Bitwise-Shift operator in their enum definitions. For example, in the CGDirectDisplay.h file which is part of Core Graphics:
enum {
kCGDisplayBeginConfigurationFlag = (1 ...
Collation asked 22/10, 2010 at 18:44
3
Solved
I know of base classes Enum and IntEnum. Both are very helpful but I miss features for flag operations. I don't expect that these two classes implement my wished feature.
Let's construct an example...
Deception asked 24/4, 2016 at 22:53
3
Solved
I am trying to solve a problem, using python code, which requires me to add two integers without the use of '+' or '-' operators. I have the following code which works perfectly for two positive nu...
Chickie asked 24/8, 2016 at 2:27
4
The problem for signed 2's complement 32-bit integers:
satMul2 - multiplies by 2, saturating to Tmin or Tmax if overflow.
Examples: satMul2(0x30000000) = 0x60000000
satMul2(0x40000000) ...
Sandoval asked 8/10, 2022 at 12:22
1
My situation is the same as in this question, but instead of using floats, I'm using integers. I feel like this difference might be significant because there might be some bit twiddling hacks that ...
Forespeak asked 28/9, 2022 at 16:56
7
Solved
What is the equivalent (in C#) of Java's >>> operator?
(Just to clarify, I'm not referring to the >> and << operators.)
Harkins asked 10/12, 2009 at 10:50
7
Given the 32 bits that represent an IEEE 754 floating-point number, how can the number be converted to an integer, using integer or bit operations on the representation (rather than using a machine...
Siphonophore asked 9/9, 2012 at 20:57
4
Solved
Java has binary-or | and binary-and & operators:
int a = 5 | 10;
int b = 5 & 10;
They do not seem to work in Kotlin:
val a = 5 | 10;
val b = 5 & 10;
How do I use Java's bitwise op...
Vexation asked 27/1, 2018 at 9:45
10
Solved
My code looks like this:
TextView task_text = (TextView) view.findViewById(R.id.task_text);
task_text.setPaintFlags( task_text.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
This causes a str...
Uranic asked 22/7, 2011 at 22:36
3
I have a 32-bit value in the lower part of a 64-bit register; the top part is 0's. Letting X denote a bit with information and with bits listed from LSB to MSB, here's what it looks like:
X X X ......
Hominy asked 7/12, 2017 at 10:28
5
How can one use in SQL Server the processing of the Flags such as on enums in C#?
For example, how would one return a list of users that are part of a list or conditions like so:
ConditionAlpha...
Sandal asked 30/11, 2012 at 12:33
4
I just started learning about bit wise operation and want to ask why and 1 ( &1) bitwise operation always return 0 or 1 .
Calcariferous asked 6/1, 2017 at 7:38
3
Solved
bool check(const char *text) {
char c;
while (c = *text++) {
if ((c & 0x80) && ((*text) & 0x80)) {
return true;
}
}
return false;
}
What's 0x80 and the what does the whole m...
Descant asked 25/1, 2022 at 23:36
4
Solved
I wanna do some bitwise operations (for example xor two files) on files in Linux , and I have no idea how I can do that. Is there any command for that or not?
any help will be appreciated.
Bitterling asked 31/7, 2011 at 11:6
5
This is a homework assignment which requires me to come up with a function to determine if x < y, if it is I must return 1, using only bitwise operators ( ! ~ & ^ | + << >> ). I ...
Fugate asked 29/1, 2013 at 17:1
3
Solved
I want to get the index which equals to 1 in binary format, now I use codes like this:
inline static uint8_t the_index(uint32_t val){
return uint8_t(log(val & ((~val) + 1))/log(2));
}
I want ...
Pedaias asked 29/11, 2021 at 9:29
6
Solved
Assume that I have:
unsigned int x = 883621;
which in binary is :
00000000000011010111101110100101
I need the fastest way to swap the two lowest bits:
00000000000011010111101110100110
Note: To c...
Cinema asked 28/10, 2021 at 10:36
7
Solved
I am facing a rather peculiar problem. I am working on a compiler for an architecture that doesn't support bitwise operations. However, it handles signed 16-bit integer arithmetics and I was wonder...
Cristobal asked 6/6, 2010 at 1:3
4
Solved
Context:
I'm learning C# and have been messing about on the Pex for fun site. The site challenges you to re-implement a secret algorithm, by typing code into the site and examining how the inputs ...
Zacynthus asked 10/7, 2014 at 17:46
2
Solved
What would be the best way to apply the bitwise OR operator (or any operator I suppose) to an array of values in javascript?
var array = [1, 5, 18, 4];
// evaluate 1 | 5 | 18 | 4
Scissure asked 30/10, 2015 at 13:49
1
Solved
I'm a beginner to programming in general so i'm sorry if i make some mistakes while putting this question up.
The tutorial I'm following goes over this code:
package main
import (
"fmt"...
Earthworm asked 29/7, 2021 at 12:16
10
I occasionally will come across an integer type (e.g. POSIX signed integer type off_t) where it would be helpful to have a macro for its minimum and maximum values, but I don't know how to make one...
Polypody asked 22/12, 2010 at 23:12
7
How can I implement bitwise operators in Lua language?
Specifically, I need a XOR operator/method.
Deferral asked 12/5, 2011 at 12:2
15
Solved
I always thought that && operator in Java is used for verifying whether both its boolean operands are true, and the & operator is used to do Bit-wise operations on two integer types.
R...
Epidermis asked 6/4, 2011 at 9:46
27
Solved
How can I set, clear, and toggle a bit?
Changeless asked 7/9, 2008 at 0:42
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