| 0,0 → 1,62 |
|---|
| /* |
| FUNCTION |
| <<wcpncpy>>---copy part of a wide-character string returning a pointer to its end |
| |
| ANSI_SYNOPSIS |
| #include <wchar.h> |
| wchar_t *wcpncpy(wchar_t *__restrict <[s1]>, |
| const wchar_t *__restrict <[s2]>, size_t <[n]>); |
| |
| TRAD_SYNOPSIS |
| wchar_t *wcpncpy(<[s1]>, <[s2]>, <[n]> |
| wchar_t *__restrict <[s1]>; |
| const wchar_t *__restrict <[s2]>; |
| size_t <[n]>; |
| |
| DESCRIPTION |
| The <<wcpncpy>> 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. |
| |
| 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 <<wcpncpy>> function returns <[s1]>; no return value is reserved to |
| indicate an error. |
| |
| PORTABILITY |
| <<wcpncpy>> is ISO/IEC 9899/AMD1:1995 (ISO C). |
| |
| No supporting OS subroutines are required. |
| */ |
| |
| #include <_ansi.h> |
| #include <wchar.h> |
| |
| wchar_t * |
| _DEFUN (wcpncpy, (dst, src, count), |
| wchar_t *__restrict dst _AND |
| _CONST wchar_t *__restrict src _AND |
| size_t count) |
| { |
| wchar_t *ret = NULL; |
| |
| while (count > 0) |
| { |
| --count; |
| if ((*dst++ = *src++) == L'\0') |
| { |
| ret = dst - 1; |
| break; |
| } |
| } |
| while (count-- > 0) |
| *dst++ = L'\0'; |
| |
| return ret ? ret : dst; |
| } |