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/* memmove_s( void *, rsize_t, const void *, rsize_t )
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#define __STDC_WANT_LIB_EXT1__ 1
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#ifndef REGTEST
errno_t memmove_s( void * s1, rsize_t s1max, const void * s2, rsize_t n )
{
char * dest = ( char * ) s1;
const char * src = ( const char * ) s2;
if ( s1 == NULL || s2 == NULL || s1max > RSIZE_MAX || n > RSIZE_MAX || n > s1max )
{
if ( s1 != NULL && s1max <= RSIZE_MAX )
{
memset( s1, 0, s1max );
}
_PDCLIB_constraint_handler( _PDCLIB_CONSTRAINT_VIOLATION( _PDCLIB_EINVAL ) );
return _PDCLIB_EINVAL;
}
while ( n )
{
if ( dest == s2 || src == s1 )
{
src += n;
dest += n;
while ( n-- )
{
*--dest = *--src;
}
return 0;
}
*dest++ = *src++;
--n;
}
return 0;
}
#endif
#ifdef TEST
#include "_PDCLIB_test.h"
#if ! defined( REGTEST ) || defined( __STDC_LIB_EXT1__ )
static int HANDLER_CALLS = 0;
static void test_handler( const char * _PDCLIB_restrict msg, void * _PDCLIB_restrict ptr, errno_t error )
{
++HANDLER_CALLS;
}
#endif
int main( void )
{
#if ! defined( REGTEST ) || defined( __STDC_LIB_EXT1__ )
char s[] = "xxxxabcde";
set_constraint_handler_s( test_handler );
TESTCASE( memmove_s( s, 10, s + 4, 5 ) == 0 );
TESTCASE( s[0] == 'a' );
TESTCASE( s[4] == 'e' );
TESTCASE( s[5] == 'b' );
TESTCASE( memmove_s( s + 4, 6, s, 5 ) == 0 );
TESTCASE( s[4] == 'a' );
TESTCASE( HANDLER_CALLS == 0 );
#endif
return TEST_RESULTS;
}
#endif
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