welibc
A clear, secure, and well documented standard C library
memcpy.c
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1 /*******************************************************************************
2  Copyright (c) 2017 Walt Elam
3  All rights reserved.
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30 *******************************************************************************/
31 /***************************************************************************//**
32  @file memcpy.c
33 
34  @brief Defines the memcpy function
35 *******************************************************************************/
36 #include <string.h>
37 
38 /*******************************************************************************
39  memcpy
40 *//**
41  @brief Copies n characters from s2 into s1
42  @param *s1 The destination location to which to copy characters
43  @param *s2 The source location from which to copy characters
44  @param n The number of characters to copy
45 
46  The memcpy function copies n characters from the object pointed to by s2
47  into the object pointed to by s1.
48 
49  @note Copying between overlapping objects is supported, but the source may
50  be overwritten.
51 
52  @warn If copying is attempted such that a memory read/write will wrap, the
53  copy will not take place.
54 
55  @see memmove()
56 
57  @return The value of s1
58 *******************************************************************************/
59 void *
60 memcpy(void *s1, const void *s2, size_t n)
61 {
62  return memmove(s1, s2, n);
63 }
64 
string.h
Declares types, functions, and macros for manipulating arrays of character type and other objects tre...
memmove
void * memmove(void *s1, const void *s2, size_t n)
Copies n characters from s2 into s1.
Definition: memmove.c:59
memcpy
void * memcpy(void *s1, const void *s2, size_t n)
Copies n characters from s2 into s1.
Definition: memcpy.c:60