44 lines
909 B
C
44 lines
909 B
C
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/* wchar_t * wcsncpy( wchar_t *, const wchar_t * , 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 <wchar.h>
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#ifndef REGTEST
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wchar_t *wcsncpy( wchar_t * _PDCLIB_restrict s1,
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const wchar_t * _PDCLIB_restrict s2,
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size_t n )
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{
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wchar_t * rc = s1;
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while ( ( n > 0 ) && ( *s1++ = *s2++ ) )
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{
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/* Cannot do "n--" in the conditional as size_t is unsigned and we have
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to check it again for >0 in the next loop below, so we must not risk
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underflow.
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*/
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--n;
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}
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/* Checking against 1 as we missed the last --n in the loop above. */
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while ( n-- > 1 )
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{
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*s1++ = '\0';
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}
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return rc;
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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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return TEST_RESULTS;
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}
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#endif
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