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What is the difference between memmove and memcpy?
... that way. Thats indeed relevant as most memmove implementations just do a XOR-swap.
– dhein
May 8 '15 at 11:25
3
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Redefining NULL
... trick is to hack the compiler so that pointer<->integer conversions XOR a specific value that is an invalid pointer and still trivial enough that the target architecture can do that cheaply (usually, that would be a value with a single bit set, such as 0x20000000).
– Sim...
How to remove an item for a OR'd enum?
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What about xor(^)?
Given that the FLAG you are trying to remove is there, it will work.. if not, you will have to use an &.
public enum Colour
{
None = 0, // default value
RED = 2,
BLUE = 4,
GREEN = 8,
YELLOW ...
Simple way to encode a string according to a password?
...less you read this and don't mind talking with lawyers:
What's wrong with XOR encryption?
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Git: Remove committed file after push
... answered Feb 26 '14 at 12:25
xorxor
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`testl` eax against eax?
...rom the same bag of tricks that holds the idea of clearing a register with XOR EAX,EAX (which i saw on someone's license plate in Colorado!) rather than the obvious but maybe slower MOV EAX, #0 (i use an older notation).
In asm, like perl, TMTOWTDI.
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How can I ensure that a division of integers is always rounded up?
...ositive by checking that the signs of both integers are identical. Integer xor operator '^' on the two values will result in a 0 sign-bit when this is the case, meaning a non-negative result, so the check (a ^ b) >= 0 determines that the result should have been positive before rounding. Also note...
LaTeX source code listing like in professional books
... VT = np.zeros((n*m,1), int) #dummy variable
#compute the bitwise xor matrix
M1 = bitxormatrix(genl1)
M2 = np.triu(bitxormatrix(genl2),1)
for i in range(m-1):
for j in range(i+1, m):
[r,c] = np.where(M2 == M1[i,j])
for k in range(len(r)):
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XML attribute vs XML element
...r example, attribute set choices. For example use (startDate and endDate) xor (startTS and endTS) is not possible with the current schema language
If XML Schema starts allowing the "all" content model to be restricted or extended then I would probably drop it
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What is the significance of initializing direction arrays below with given values when developing ch
...6.
.1X0.
.724.
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The way it is set up, if you do ^1 (^ being bitwise XOR) on the index you get the opposite direction - 0 and 1 are opposites, 2 and 3 are opposites and so on. (Another way to set it up is to go clockwise starting at north - then ^4 gets you the opposite direction.)
Now you ca...