NSMutableData memcpy vs. memmove

[Alexander Malmberg]

Hi,

I noticed that [NSMutableData -replaceBytesInRange: withBytes:] uses
memcpy() when copying the new bytes into its mutableBytes. This means
that eg.:

NSMutableData *foo;
...
[foo replaceBytesInRange: NSMakeRange(5,[foo length]) withBytes: [foo
bytes]];

isn't safe. The docs I have don't say anything about how overlapping
should be handled, but it seems safer to use memmove() anyway. If it
should remain like it is, the behavior should at least be documented.

- Alexander Malmberg