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| <h3 class="section">6.19 <code>wcsncpy</code>—copy part of a wide-character string</h3> |
| |
| <p><strong>Synopsis</strong> |
| <pre class="example"> #include <wchar.h> |
| wchar_t *wcsncpy(wchar_t *<var>s1</var>, const wchar_t *<var>s2</var>, size_t <var>n</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| The <code>wcsncpy</code> function copies not more than <var>n</var> wide-character codes |
| (wide-character codes that follow a null wide-character code are not |
| copied) from the array pointed to by <var>s2</var> to the array pointed to |
| by <var>s1</var>. If copying takes place between objects that overlap, the |
| behaviour is undefined. Note that if <var>s1</var> contains more than <var>n</var> |
| wide characters before its terminating null, the result is not |
| null-terminated. |
| |
| <p>If the array pointed to by <var>s2</var> is a wide-character string that is |
| shorter than <var>n</var> wide-character codes, null wide-character codes are |
| appended to the copy in the array pointed to by <var>s1</var>, until <var>n</var> |
| wide-character codes in all are written. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| The <code>wcsncpy</code> function returns <var>s1</var>; no return value is reserved to |
| indicate an error. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| ISO/IEC 9899; POSIX.1. |
| |
| <p>No supporting OS subroutines are required. |
| |
| <p><br> |
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