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       memcpy.3 (570B)
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            1 .TH memcpy 3
            2 .SH NAME
            3 memcpy - copy bytes in memory
            4 .SH SYNOPSIS
            5 #include <string.h>
            6 
            7 void *memcpy (void *restrict s1, const void *restrict s2, size_t n)
            8 .SH DESCRIPTION
            9 The
           10 .BR memcpy ()
           11 function copies the first
           12 .I n
           13 bytes of the object pointed to by
           14 .I s2
           15 into the object pointed to by
           16 .IR s1 .
           17 The function does not modify
           18 .I s1
           19 if
           20 .I n
           21 is equal to 0.
           22 If copying takes place between objects that overlap,
           23 the behavior is undefined.
           24 .SH RETURN VALUE
           25 The
           26 .BR memcpy ()
           27 function shall always return the pointer
           28 .IR s1 .
           29 .SH STANDARDS
           30 ISO/IEC 9899:1999 Section 7.21.2.1