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[/] [openrisc/] [tags/] [gnu-src/] [newlib-1.18.0/] [newlib-1.18.0-or32-1.0rc1/] [newlib/] [libc/] [string/] [wcsncpy.c] - Rev 345
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/* 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; }