Last change
on this file was
444,
checked in by satin@…, 6 years ago
|
add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
File size:
1.3 KB
|
Rev | Line | |
---|
[444] | 1 | /* |
---|
| 2 | FUNCTION |
---|
| 3 | <<wcsncpy>>---copy part of a wide-character string |
---|
| 4 | |
---|
| 5 | SYNOPSIS |
---|
| 6 | #include <wchar.h> |
---|
| 7 | wchar_t *wcsncpy(wchar_t *__restrict <[s1]>, |
---|
| 8 | const wchar_t *__restrict <[s2]>, size_t <[n]>); |
---|
| 9 | |
---|
| 10 | DESCRIPTION |
---|
| 11 | The <<wcsncpy>> function copies not more than <[n]> wide-character codes |
---|
| 12 | (wide-character codes that follow a null wide-character code are not |
---|
| 13 | copied) from the array pointed to by <[s2]> to the array pointed to |
---|
| 14 | by <[s1]>. If copying takes place between objects that overlap, the |
---|
| 15 | behaviour is undefined. Note that if <[s1]> contains more than <[n]> |
---|
| 16 | wide characters before its terminating null, the result is not |
---|
| 17 | null-terminated. |
---|
| 18 | |
---|
| 19 | If the array pointed to by <[s2]> is a wide-character string that is |
---|
| 20 | shorter than <[n]> wide-character codes, null wide-character codes are |
---|
| 21 | appended to the copy in the array pointed to by <[s1]>, until <[n]> |
---|
| 22 | wide-character codes in all are written. |
---|
| 23 | |
---|
| 24 | RETURNS |
---|
| 25 | The <<wcsncpy>> function returns <[s1]>; no return value is reserved to |
---|
| 26 | indicate an error. |
---|
| 27 | |
---|
| 28 | PORTABILITY |
---|
| 29 | ISO/IEC 9899; POSIX.1. |
---|
| 30 | |
---|
| 31 | No supporting OS subroutines are required. |
---|
| 32 | */ |
---|
| 33 | |
---|
| 34 | #include <_ansi.h> |
---|
| 35 | #include <wchar.h> |
---|
| 36 | |
---|
| 37 | wchar_t * |
---|
| 38 | wcsncpy (wchar_t *__restrict s1, |
---|
| 39 | const wchar_t *__restrict s2, |
---|
| 40 | size_t n) |
---|
| 41 | { |
---|
| 42 | wchar_t *dscan=s1; |
---|
| 43 | |
---|
| 44 | while(n > 0) |
---|
| 45 | { |
---|
| 46 | --n; |
---|
| 47 | if((*dscan++ = *s2++) == L'\0') break; |
---|
| 48 | } |
---|
| 49 | while(n-- > 0) *dscan++ = L'\0'; |
---|
| 50 | |
---|
| 51 | return s1; |
---|
| 52 | } |
---|
Note: See
TracBrowser
for help on using the repository browser.