msvcrt: Implemented _itow_s.

dlls/msvcr100/msvcr100.spec

@@ -836,7 +836,7 @@
 @ cdecl _itoa(long ptr long) msvcrt._itoa
 @ cdecl _itoa_s(long ptr long long) msvcrt._itoa_s
 @ cdecl _itow(long ptr long) msvcrt._itow
-@ stub _itow_s
+@ cdecl _itow_s(long ptr long long) msvcrt._itow_s
 @ cdecl _j0(double) msvcrt._j0
 @ cdecl _j1(double) msvcrt._j1
 @ cdecl _jn(long double) msvcrt._jn

dlls/msvcr80/msvcr80.spec

@@ -682,7 +682,7 @@
 @ cdecl _itoa(long ptr long) msvcrt._itoa
 @ cdecl _itoa_s(long ptr long long) msvcrt._itoa_s
 @ cdecl _itow(long ptr long) msvcrt._itow
-@ stub _itow_s
+@ cdecl _itow_s(long ptr long long) msvcrt._itow_s
 @ cdecl _j0(double) msvcrt._j0
 @ cdecl _j1(double) msvcrt._j1
 @ cdecl _jn(long double) msvcrt._jn

dlls/msvcr90/msvcr90.spec

@@ -670,7 +670,7 @@
 @ cdecl _itoa(long ptr long) msvcrt._itoa
 @ cdecl _itoa_s(long ptr long long) msvcrt._itoa_s
 @ cdecl _itow(long ptr long) msvcrt._itow
-@ stub _itow_s
+@ cdecl _itow_s(long ptr long long) msvcrt._itow_s
 @ cdecl _j0(double) msvcrt._j0
 @ cdecl _j1(double) msvcrt._j1
 @ cdecl _jn(long double) msvcrt._jn

dlls/msvcrt/msvcrt.spec

@@ -611,7 +611,7 @@
 @ cdecl _itoa(long ptr long) ntdll._itoa
 @ cdecl _itoa_s(long ptr long long)
 @ cdecl _itow(long ptr long) ntdll._itow
-# stub _itow_s
+@ cdecl _itow_s(long ptr long long)
 @ cdecl _j0(double)
 @ cdecl _j1(double)
 @ cdecl _jn(long double)

dlls/msvcrt/string.c

@@ -746,6 +746,83 @@ int CDECL _itoa_s(int value, char *str, MSVCRT_size_t size, int radix)
 }
 
 /*********************************************************************
+ *  _itow_s (MSVCRT.@)
+ */
+int CDECL _itow_s(int value, MSVCRT_wchar_t *str, MSVCRT_size_t size, int radix)
+{
+    unsigned int val, digit;
+    int is_negative;
+    MSVCRT_wchar_t buffer[33], *pos;
+    size_t len;
+
+    if (!MSVCRT_CHECK_PMT(str != NULL) || !MSVCRT_CHECK_PMT(size > 0) ||
+        !MSVCRT_CHECK_PMT(radix >= 2) || !MSVCRT_CHECK_PMT(radix <= 36))
+    {
+        if (str && size)
+            str[0] = '\0';
+
+        *MSVCRT__errno() = MSVCRT_EINVAL;
+        return MSVCRT_EINVAL;
+    }
+
+    if (value < 0 && radix == 10)
+    {
+        is_negative = 1;
+        val = -value;
+    }
+    else
+    {
+        is_negative = 0;
+        val = value;
+    }
+
+    pos = buffer + 32;
+    *pos = '\0';
+
+    do
+    {
+        digit = val % radix;
+        val /= radix;
+
+        if (digit < 10)
+            *--pos = '0' + digit;
+        else
+            *--pos = 'a' + digit - 10;
+    }
+    while (val != 0);
+
+    if (is_negative)
+        *--pos = '-';
+
+    len = buffer + 33 - pos;
+    if (len > size)
+    {
+        size_t i;
+        MSVCRT_wchar_t *p = str;
+
+        /* Copy the temporary buffer backwards up to the available number of
+         * characters. Don't copy the negative sign if present. */
+
+        if (is_negative)
+        {
+            p++;
+            size--;
+        }
+
+        for (pos = buffer + 31, i = 0; i < size; i++)
+            *p++ = *pos--;
+
+        MSVCRT_INVALID_PMT("str[size] is too small");
+        str[0] = '\0';
+        *MSVCRT__errno() = MSVCRT_ERANGE;
+        return MSVCRT_ERANGE;
+    }
+
+    memcpy(str, pos, len * sizeof(MSVCRT_wchar_t));
+    return 0;
+}
+
+/*********************************************************************
  *  _ui64toa_s (MSVCRT.@)
  */
 int CDECL MSVCRT__ui64toa_s(unsigned __int64 value, char *str,