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oleaut32: Fix some corner cases in VarBstrCmp.

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This commit is contained in:
Lei Zhang 2009-03-20 15:37:07 -07:00 committed by Alexandre Julliard
parent 68dba4eff3
commit 25c2e283d8
2 changed files with 33 additions and 5 deletions
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20
dlls/oleaut32/tests/vartype.c
View file

@ -4983,6 +4983,8 @@ static void test_VarBstrCmp(void)
static const WCHAR s2[] = { 'a',0,'b' };
static const char sb1[] = {1,0,1};
static const char sb2[] = {1,0,2};
static const char sbchr0[] = {0,0};
static const char sbchr00[] = {0,0,0};
BSTR bstr, bstrempty, bstr2;
CHECKPTR(VarBstrCmp);
@ -5021,6 +5023,15 @@ static void test_VarBstrCmp(void)
SysFreeString(bstr);
bstr = SysAllocStringByteLen(sbchr0, sizeof(sbchr0));
bstr2 = SysAllocStringByteLen(sbchr0, sizeof(sbchr00));
VARBSTRCMP(bstr,bstrempty,0,VARCMP_GT);
VARBSTRCMP(bstrempty,bstr,0,VARCMP_LT);
VARBSTRCMP(bstr2,bstrempty,0,VARCMP_GT);
VARBSTRCMP(bstr2,bstr,0,VARCMP_EQ);
SysFreeString(bstr2);
SysFreeString(bstr);
/* When (LCID == 0) it should be a binary comparison
* so these two strings could not match.
*/
@ -5030,6 +5041,15 @@ static void test_VarBstrCmp(void)
VARBSTRCMP(bstr,bstr2,0,VARCMP_LT);
SysFreeString(bstr2);
SysFreeString(bstr);
bstr = SysAllocStringByteLen(sbchr0, sizeof(sbchr0));
bstr2 = SysAllocStringByteLen(sbchr0, sizeof(sbchr00));
VARBSTRCMP(bstr,bstrempty,0,VARCMP_GT);
VARBSTRCMP(bstrempty,bstr,0,VARCMP_LT);
VARBSTRCMP(bstr2,bstrempty,0,VARCMP_GT);
VARBSTRCMP(bstr2,bstr,0,VARCMP_GT);
SysFreeString(bstr2);
SysFreeString(bstr);
}
/* Get the internal representation of a BSTR */

18
dlls/oleaut32/vartype.c
View file

@ -6957,9 +6957,8 @@ HRESULT WINAPI VarBstrCmp(BSTR pbstrLeft, BSTR pbstrRight, LCID lcid, DWORD dwFl
if (!pbstrLeft || !*pbstrLeft)
{
if (!pbstrRight || !*pbstrRight)
return VARCMP_EQ;
return VARCMP_LT;
if (pbstrRight && *pbstrRight)
return VARCMP_LT;
}
else if (!pbstrRight || !*pbstrRight)
return VARCMP_GT;
@ -6981,8 +6980,17 @@ HRESULT WINAPI VarBstrCmp(BSTR pbstrLeft, BSTR pbstrRight, LCID lcid, DWORD dwFl
}
else
{
hres = CompareStringW(lcid, dwFlags, pbstrLeft, SysStringLen(pbstrLeft),
pbstrRight, SysStringLen(pbstrRight)) - 1;
unsigned int lenLeft = SysStringLen(pbstrLeft);
unsigned int lenRight = SysStringLen(pbstrRight);
if (lenLeft == 0 || lenRight == 0)
{
if (lenLeft == 0 && lenRight == 0) return VARCMP_EQ;
return lenLeft < lenRight ? VARCMP_LT : VARCMP_GT;
}
hres = CompareStringW(lcid, dwFlags, pbstrLeft, lenLeft,
pbstrRight, lenRight) - 1;
TRACE("%d\n", hres);
return hres;
}