memmove - copy bytes in memory with overlapping areas
void *memmove(void *s1, const void *s2, size_t n);
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard.
The memmove() function shall copy n bytes from the object pointed to by s2 into the object pointed to by s1. Copying takes place as if the n bytes from the object pointed to by s2 are first copied into a temporary array of n bytes that does not overlap the objects pointed to by s1 and s2, and then the n bytes from the temporary array are copied into the object pointed to by s1.
The memmove() function shall return s1; no return value is reserved to indicate an error.
No errors are defined.
First released in Issue 4. Derived from the ANSI C standard.
return to top of page