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PDCLib / functions / string / memcpy.c

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/* $Id$ */

/* memcpy( 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 * memcpy( void * _PDCLIB_restrict s1, const void * _PDCLIB_restrict s2, size_t n )
{
    char * dest = (char *) s1;
    const char * src = (const char *) s2;
    while ( n-- )
    {
        *dest++ = *src++;
    }
    return s1;
}

#endif

#ifdef TEST
#include <_PDCLIB_test.h>

int main( void )
{
    char s[] = "xxxxxxxxxxx";
    TESTCASE( memcpy( s, abcde, 6 ) == s );
    TESTCASE( s[4] == 'e' );
    TESTCASE( s[5] == '\0' );
    TESTCASE( memcpy( s + 5, abcde, 5 ) == s + 5 );
    TESTCASE( s[9] == 'e' );
    TESTCASE( s[10] == 'x' );
    return TEST_RESULTS;
}
#endif
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