Is it ok to use memcpy to combine two wchar_t strings?

[vestal stream]

I want to read from stdin as wchar_t* string using fgetws and accumulate it in one buffer. I'am trying to use wcscat for this, but it's pretty slow. So I tried using memcpy and it seems to be working.

[wet gate]

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[vestal stream]

Is it ok to use memcpy to combine two wchar_t strings?

[amber notch]

Personally I wouldn't do that

memcpy is efficient because, for one, it doesn't take precautions to avoid UB

Especially since you are taking stuff like user input

[vestal stream]

But i reading in a buffer with known size