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