memccpy - copy memory area
void *memccpy(void *dest, const void *src, int c, size_t n);
The memccpy() function copies no more than n bytes from memory
area src to memory area dest, stopping when the character
c is found.
If the memory areas overlap, the results are undefined.
The memccpy() function returns a pointer to the next character in
dest after c, or NULL if c was not found in the first
n characters of src.
For an explanation of the terms used in this section, see attributes(7).
POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD.
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