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[/] [openrisc/] [tags/] [gnu-src/] [newlib-1.18.0/] [newlib-1.18.0-or32-1.0rc1/] [newlib/] [libc/] [string/] [wcpncpy.c] - Rev 345
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/* 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 *<[s1]>, const wchar_t *<[s2]>, size_t <[n]>); TRAD_SYNOPSIS wchar_t *wcpncpy(<[s1]>, <[s2]>, <[n]> wchar_t *<[s1]>; const wchar_t *<[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 * dst _AND _CONST wchar_t * 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; }