ref: fe2b29d13bac3ab3c16490b859f452201c6b4c77
dir: /doc/man3/memcpy.3/
.TH memcpy 3 .SH NAME memcpy - copy bytes in memory .SH SYNOPSIS #include <string.h> void *memcpy (void *restrict s1, const void *restrict s2, size_t n) .SH DESCRIPTION The .BR memcpy () function copies the first .I n bytes of the object pointed to by .I s2 into the object pointed to by .IR s1 . The function does not modify .I s1 if .I n is equal to 0. If copying takes place between objects that overlap, the behavior is undefined. .SH RETURN VALUE The .BR memcpy () function shall always return the pointer .IR s1 . .SH STANDARDS ISO/IEC 9899:1999 Section 7.21.2.1