Microchip Technology SW006021-2 Manuel D’Utilisation
MPLAB
®
XC8 C Compiler User’s Guide
DS52053B-page 346
2012 Microchip Technology Inc.
See Also
strncpy()
, strncmp(), strchr(), memset(), memchr()
Return Value
Returns negative one, zero or one, depending on whether
s1
points to string which is
less than, equal to or greater than the string pointed to by
s2
in the collating sequence.
MEMCPY
Synopsis
#include <string.h>
void * memcpy (void * d, const void * s, size_t n)
Description
The
memcpy()
function copies
n
bytes of memory starting from the location pointed to
by
s
to the block of memory pointed to by
d
. The result of copying overlapping blocks
is undefined. The
memcpy()
function differs from strcpy() in that it copies a specified
number of bytes, rather than all bytes up to a null terminator.
Example
#include <string.h>
#include <stdio.h>
void
main (void)
{
char buf[80];
memset(buf, 0, sizeof buf);
memcpy(buf, "A partial string", 10);
printf("buf = ’%s’\n", buf);
}
See Also
strncpy()
, strncmp(), strchr(), memset()
Return Value
The
memcpy()
routine returns its first argument.
MEMMOVE
Synopsis
#include <string.h>
void * memmove (void * s1, const void * s2, size_t n)
Description
The
memmove()
function is similar to the function memcpy() except copying of
overlapping blocks is handled correctly. That is, it will copy forwards or backwards as
appropriate to correctly copy one block to another that overlaps it.
appropriate to correctly copy one block to another that overlaps it.
See Also
strncpy()
, strncmp(), strchr(), memcpy()