msvcrt: Implement _get_doserrno.

dlls/msvcr100/msvcr100.spec

@@ -677,7 +677,7 @@
 @ cdecl _gcvt_s(ptr long  double long) msvcrt._gcvt_s
 @ stub _get_current_locale
 @ stub _get_daylight
-@ stub _get_doserrno
+@ cdecl _get_doserrno(ptr) msvcrt._get_doserrno
 @ stub _get_dstbias
 @ cdecl _get_errno(ptr) msvcrt._get_errno
 @ stub _get_fmode

dlls/msvcr80/msvcr80.spec

@@ -519,7 +519,7 @@
 @ stub _get_amblksiz
 @ stub _get_current_locale
 @ stub _get_daylight
-@ stub _get_doserrno
+@ cdecl _get_doserrno(ptr) msvcrt._get_doserrno
 @ stub _get_dstbias
 @ cdecl _get_errno(ptr) msvcrt._get_errno
 @ stub _get_fmode

dlls/msvcr90/msvcr90.spec

@@ -511,7 +511,7 @@
 @ stub _get_amblksiz
 @ stub _get_current_locale
 @ stub _get_daylight
-@ stub _get_doserrno
+@ cdecl _get_doserrno(ptr) msvcrt._get_doserrno
 @ stub _get_dstbias
 @ cdecl _get_errno(ptr) msvcrt._get_errno
 @ stub _get_fmode

dlls/msvcrt/errno.c

@@ -216,6 +216,18 @@ int CDECL _get_errno(int *pValue)
 }
 
 /*********************************************************************
+ *		_get_doserrno (MSVCRT.@)
+ */
+int CDECL _get_doserrno(int *pValue)
+{
+    if (!pValue)
+        return MSVCRT_EINVAL;
+
+    *pValue = *MSVCRT___doserrno();
+    return 0;
+}
+
+/*********************************************************************
  *		strerror (MSVCRT.@)
  */
 char* CDECL MSVCRT_strerror(int err)

dlls/msvcrt/msvcrt.spec

@@ -462,7 +462,7 @@
 @ varargs _fwscanf_s_l(ptr wstr ptr) MSVCRT__fwscanf_s_l
 @ cdecl _gcvt(double long str)
 @ cdecl _gcvt_s(ptr long  double long)
-# stub _get_doserrno
+@ cdecl _get_doserrno(ptr)
 # stub _get_environ
 @ cdecl _get_errno(ptr)
 # stub _get_fileinfo

dlls/msvcrt/tests/misc.c

@@ -26,6 +26,7 @@ static int (__cdecl *prand_s)(unsigned int *);
 static int (__cdecl *pmemcpy_s)(void *, MSVCRT_size_t, void*, MSVCRT_size_t);
 static int (__cdecl *pI10_OUTPUT)(long double, int, int, void*);
 static int (__cdecl *pstrerror_s)(char *, MSVCRT_size_t, int);
+static int (__cdecl *p_get_doserrno)(int *);
 static int (__cdecl *p_get_errno)(int *);
 
 static void init(void)
@@ -36,6 +37,7 @@ static void init(void)
     pmemcpy_s = (void*)GetProcAddress(hmod, "memcpy_s");
     pI10_OUTPUT = (void*)GetProcAddress(hmod, "$I10_OUTPUT");
     pstrerror_s = (void *)GetProcAddress(hmod, "strerror_s");
+    p_get_doserrno = (void *)GetProcAddress(hmod, "_get_doserrno");
     p_get_errno = (void *)GetProcAddress(hmod, "_get_errno");
 }
 
@@ -243,6 +245,31 @@ static void test_strerror_s(void)
     ok(ret == 0, "Expected strerror_s to return 0, got %d\n", ret);
 }
 
+static void test__get_doserrno(void)
+{
+    int ret, out;
+
+    if (!p_get_doserrno)
+    {
+        win_skip("_get_doserrno is not available\n");
+        return;
+    }
+
+    _doserrno = ERROR_INVALID_CMM;
+    errno = EBADF;
+    ret = p_get_doserrno(NULL);
+    ok(ret == EINVAL, "Expected _get_doserrno to return EINVAL, got %d\n", ret);
+    ok(_doserrno = ERROR_INVALID_CMM, "Expected _doserrno to be ERROR_INVALID_CMM, got %d\n", _doserrno);
+    ok(errno == EBADF, "Expected errno to be EBADF, got %d\n", errno);
+
+    _doserrno = ERROR_INVALID_CMM;
+    errno = EBADF;
+    out = 0xdeadbeef;
+    ret = p_get_doserrno(&out);
+    ok(ret == 0, "Expected _get_doserrno to return 0, got %d\n", ret);
+    ok(out == ERROR_INVALID_CMM, "Expected output variable to be ERROR_INVAID_CMM, got %d\n", out);
+}
+
 static void test__get_errno(void)
 {
     int ret, out;
@@ -273,5 +300,6 @@ START_TEST(misc)
     test_memcpy_s();
     test_I10_OUTPUT();
     test_strerror_s();
+    test__get_doserrno();
     test__get_errno();
 }

include/msvcrt/stdlib.h

@@ -128,6 +128,7 @@ extern int*           __cdecl _errno(void);
  * char** _sys_errlist;
  */
 
+errno_t       __cdecl _get_doserrno(int*);
 errno_t       __cdecl _get_errno(int*);
 
 typedef int (__cdecl *_onexit_t)(void);