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/* memmove( void *, const void *, size_t )
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#include <string.h>
#ifndef REGTEST
void * memmove( void * s1, const void * s2, size_t n )
{
char * dest = ( char * ) s1;
const char * src = ( const char * ) s2;
if ( dest <= src )
{
while ( n-- )
{
*dest++ = *src++;
}
}
else
{
src += n;
dest += n;
while ( n-- )
{
*--dest = *--src;
}
}
return s1;
}
#endif
#ifdef TEST
#include "_PDCLIB_test.h"
int main( void )
{
char s[] = "xxxxabcde";
TESTCASE( memmove( s, s + 4, 5 ) == s );
TESTCASE( s[0] == 'a' );
TESTCASE( s[4] == 'e' );
TESTCASE( s[5] == 'b' );
TESTCASE( memmove( s + 4, s, 5 ) == s + 4 );
TESTCASE( s[4] == 'a' );
return TEST_RESULTS;
}
#endif
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