Alexandre Julliard : ntdll: Add _ui64tow_s.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 703212b67e37f35af6dcd1d23f81778bb07475b9
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=703212b67e37f35af6dcd1d23f81778bb07475b9

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Thu Jun 30 11:05:32 2022 +0200

ntdll: Add _ui64tow_s.

Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/ntdll/ntdll.spec |  2 ++
 dlls/ntdll/wcstring.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/dlls/ntdll/ntdll.spec b/dlls/ntdll/ntdll.spec
index ca896902762..9666fcc7f36 100644
--- a/dlls/ntdll/ntdll.spec
+++ b/dlls/ntdll/ntdll.spec
@@ -1529,8 +1529,10 @@
 @ cdecl _toupper(long)
 @ cdecl _ui64toa(int64 ptr long)
 @ cdecl _ui64tow(int64 ptr long)
+@ cdecl _ui64tow_s(int64 ptr long long)
 @ cdecl _ultoa(long ptr long)
 @ cdecl _ultow(long ptr long)
+@ cdecl _ultow_s(long ptr long long)
 @ cdecl -norelay _vsnprintf(ptr long str ptr)
 @ cdecl _vsnprintf_s(ptr long str ptr)
 @ cdecl _vsnwprintf(ptr long wstr ptr)
diff --git a/dlls/ntdll/wcstring.c b/dlls/ntdll/wcstring.c
index 192bd9e9a46..8d53388f4c4 100644
--- a/dlls/ntdll/wcstring.c
+++ b/dlls/ntdll/wcstring.c
@@ -1082,6 +1082,51 @@ LPWSTR __cdecl _i64tow(
 }
 
 
+/*********************************************************************
+ *      _ui64tow_s  (NTDLL.@)
+ */
+errno_t __cdecl _ui64tow_s( unsigned __int64 value, wchar_t *str, size_t size, int radix )
+{
+    wchar_t buffer[65], *pos;
+
+    if (!str || !size) return EINVAL;
+    if (radix < 2 || radix > 36)
+    {
+        str[0] = 0;
+        return EINVAL;
+    }
+
+    pos = buffer + 64;
+    *pos = 0;
+
+    do {
+	int digit = value % radix;
+	value = value / radix;
+	if (digit < 10)
+	    *--pos = '0' + digit;
+	else
+	    *--pos = 'a' + digit - 10;
+    } while (value != 0);
+
+    if (buffer - pos + 65 > size)
+    {
+        str[0] = 0;
+        return ERANGE;
+    }
+    memcpy( str, pos, (buffer - pos + 65) * sizeof(wchar_t) );
+    return 0;
+}
+
+
+/*********************************************************************
+ *      _ultow_s  (NTDLL.@)
+ */
+errno_t __cdecl _ultow_s( __msvcrt_ulong value, wchar_t *str, size_t size, int radix )
+{
+    return _ui64tow_s( value, str, size, radix );
+}
+
+
 /*********************************************************************
  *      _wtol    (NTDLL.@)
  *