[PATCH] msvcrt: Fix handling of dst == src in wcscpy_s.
Dmitry Timoshkov
dmitry at baikal.ru
Sun Jun 23 22:49:34 CDT 2019
Signed-off-by: Dmitry Timoshkov <dmitry at baikal.ru>
---
dlls/msvcrt/tests/string.c | 5 +++++
dlls/msvcrt/wcs.c | 13 +++++++++----
2 files changed, 14 insertions(+), 4 deletions(-)
diff --git a/dlls/msvcrt/tests/string.c b/dlls/msvcrt/tests/string.c
index 0f1ee47d17..da6478c1b1 100644
--- a/dlls/msvcrt/tests/string.c
+++ b/dlls/msvcrt/tests/string.c
@@ -1020,6 +1020,11 @@ static void test_wcscpy_s(void)
ok(ret == 0, "expected 0 got %d\n", ret);
ok(lstrcmpW(szDest, szLongText) == 0, "szDest != szLongText\n");
+ /* dest == source */
+ ret = p_wcscpy_s(szDest, 18, szDest);
+ ok(ret == 0, "expected 0 got %d\n", ret);
+ ok(lstrcmpW(szDest, szLongText) == 0, "szDest != szLongText\n");
+
/* Copy smaller buffer size */
errno = EBADF;
szDest[0] = 'A';
diff --git a/dlls/msvcrt/wcs.c b/dlls/msvcrt/wcs.c
index e62ac25edc..6b8c7bbe0f 100644
--- a/dlls/msvcrt/wcs.c
+++ b/dlls/msvcrt/wcs.c
@@ -2041,16 +2041,21 @@ INT CDECL MSVCRT_wcscpy_s( MSVCRT_wchar_t* wcDest, MSVCRT_size_t numElement, con
if(!MSVCRT_CHECK_PMT(wcDest)) return MSVCRT_EINVAL;
if(!MSVCRT_CHECK_PMT(numElement)) return MSVCRT_EINVAL;
- wcDest[0] = 0;
-
- if(!MSVCRT_CHECK_PMT(wcSrc)) return MSVCRT_EINVAL;
+ if(!MSVCRT_CHECK_PMT(wcSrc))
+ {
+ wcDest[0] = 0;
+ return MSVCRT_EINVAL;
+ }
size = strlenW(wcSrc) + 1;
if(!MSVCRT_CHECK_PMT_ERR(size <= numElement, MSVCRT_ERANGE))
+ {
+ wcDest[0] = 0;
return MSVCRT_ERANGE;
+ }
- memcpy( wcDest, wcSrc, size*sizeof(WCHAR) );
+ memmove( wcDest, wcSrc, size*sizeof(WCHAR) );
return 0;
}
--
2.20.1
More information about the wine-devel
mailing list