Ensure that underflowing negative float is represented as a positive
0, just as native oleaut32.
diff --git a/dlls/oleaut32/tests/vartype.c b/dlls/oleaut32/tests/vartype.c
index 7cbb982..b42627c 100644
--- a/dlls/oleaut32/tests/vartype.c
+++ b/dlls/oleaut32/tests/vartype.c
@@ -4615,7 +4615,7 @@
ok(hres == S_OK, "got hres 0x%08lx\n", hres);
if (bstr)
{
- todo_wine ok(memcmp(bstr, szZero, sizeof(szZero)) == 0, "negative zero (got %s)\n", wtoascii(bstr));
+ ok(memcmp(bstr, szZero, sizeof(szZero)) == 0, "negative zero (got %s)\n", wtoascii(bstr));
}
}
diff --git a/dlls/oleaut32/vartype.c b/dlls/oleaut32/vartype.c
index a82b692..0e1b7e8 100644
--- a/dlls/oleaut32/vartype.c
+++ b/dlls/oleaut32/vartype.c
@@ -5258,6 +5258,19 @@
return E_INVALIDARG;
sprintfW( buff, lpszFormat, dblIn );
+
+ /* Negative zeroes are disallowed (some applications depend on this).
+ If buff starts with a minus, and then nothing follows but zeroes
+ and/or a period, it is a negative zero and is replaced with a
+ canonical zero. This duplicates native oleaut32 behavior.
+ */
+ if (buff[0] == '-')
+ {
+ const WCHAR szAccept[] = {'0', '.', '\0'};
+ if (strlenW(buff + 1) == strspnW(buff + 1, szAccept))
+ { buff[0] = '0'; buff[1] = '\0'; }
+ }
+
TRACE("created string %s\n", debugstr_w(buff));
if (dwFlags & LOCALE_USE_NLS)
{
