| /* |
| FUNCTION |
| <<wcsncpy>>---copy part of a wide-character string |
| |
| ANSI_SYNOPSIS |
| #include <wchar.h> |
| wchar_t *wcsncpy(wchar_t *<[s1]>, const wchar_t *<[s2]>, size_t <[n]>); |
| |
| TRAD_SYNOPSIS |
| wchar_t *wcsncpy(<[s1]>, <[s2]>, <[n]> |
| wchar_t *<[s1]>; |
| const wchar_t *<[s2]>; |
| size_t <[n]>; |
| |
| DESCRIPTION |
| The <<wcsncpy>> function copies not more than <[n]> wide-character codes |
| (wide-character codes that follow a null wide-character code are not |
| copied) from the array pointed to by <[s2]> to the array pointed to |
| by <[s1]>. If copying takes place between objects that overlap, the |
| behaviour is undefined. Note that if <[s1]> contains more than <[n]> |
| wide characters before its terminating null, the result is not |
| null-terminated. |
| |
| If the array pointed to by <[s2]> is a wide-character string that is |
| shorter than <[n]> wide-character codes, null wide-character codes are |
| appended to the copy in the array pointed to by <[s1]>, until <[n]> |
| wide-character codes in all are written. |
| |
| RETURNS |
| The <<wcsncpy>> function returns <[s1]>; no return value is reserved to |
| indicate an error. |
| |
| PORTABILITY |
| ISO/IEC 9899; POSIX.1. |
| |
| No supporting OS subroutines are required. |
| */ |
| |
| #include <_ansi.h> |
| #include <wchar.h> |
| |
| wchar_t * |
| _DEFUN (wcsncpy, (s1, s2, n), |
| wchar_t * s1 _AND |
| _CONST wchar_t * s2 _AND |
| size_t n) |
| { |
| wchar_t *dscan=s1; |
| |
| while(n > 0) |
| { |
| --n; |
| if((*dscan++ = *s2++) == L'\0') break; |
| } |
| while(n-- > 0) *dscan++ = L'\0'; |
| |
| return s1; |
| } |