diff options
Diffstat (limited to 'wcsmbs/wcsncat.c')
| -rw-r--r-- | wcsmbs/wcsncat.c | 57 |
1 files changed, 9 insertions, 48 deletions
diff --git a/wcsmbs/wcsncat.c b/wcsmbs/wcsncat.c index 8d4013b53d..94d7347175 100644 --- a/wcsmbs/wcsncat.c +++ b/wcsmbs/wcsncat.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1995-2018 Free Software Foundation, Inc. +/* Copyright (C) 1995-2019 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995. @@ -14,7 +14,7 @@ You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ + <https://www.gnu.org/licenses/>. */ #include <wchar.h> @@ -26,54 +26,15 @@ wchar_t * WCSNCAT (wchar_t *dest, const wchar_t *src, size_t n) { - wchar_t c; - wchar_t * const s = dest; + wchar_t *ret = dest; - /* Find the end of DEST. */ - do - c = *dest++; - while (c != L'\0'); + /* Find the end of dest. */ + dest += __wcslen (dest); - /* Make DEST point before next character, so we can increment - it while memory is read (wins on pipelined cpus). */ - dest -= 2; + size_t ds = __wcsnlen (src, n); - if (n >= 4) - { - size_t n4 = n >> 2; - do - { - c = *src++; - *++dest = c; - if (c == L'\0') - return s; - c = *src++; - *++dest = c; - if (c == L'\0') - return s; - c = *src++; - *++dest = c; - if (c == L'\0') - return s; - c = *src++; - *++dest = c; - if (c == L'\0') - return s; - } while (--n4 > 0); - n &= 3; - } + dest[ds] = L'\0'; + __wmemcpy (dest, src, ds); - while (n > 0) - { - c = *src++; - *++dest = c; - if (c == L'\0') - return s; - n--; - } - - if (c != L'\0') - *++dest = L'\0'; - - return s; + return ret; } |