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mf: Fix string array access for registration data helpers. 

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Nikolay Sivov 2020-03-25 15:01:24 +03:00 committed by Alexandre Julliard
parent e121a55293
commit d0f4487c61
1 changed files with 9 additions and 8 deletions
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17
dlls/mf/main.c
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@ -1090,7 +1090,7 @@ BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved)
return TRUE; return TRUE;
} }
static HRESULT prop_string_vector_append(PROPVARIANT *vector, unsigned int *count, BOOL unique, const WCHAR *str) static HRESULT prop_string_vector_append(PROPVARIANT *vector, unsigned int *capacity, BOOL unique, const WCHAR *str)
{ {
WCHAR *ptrW; WCHAR *ptrW;
int len, i; int len, i;
@ -1104,17 +1104,17 @@ static HRESULT prop_string_vector_append(PROPVARIANT *vector, unsigned int *coun
} }
} }
if (!vector->calpwstr.cElems || *count > vector->calpwstr.cElems - 1) if (!*capacity || *capacity - 1 < vector->calpwstr.cElems)
{ {
unsigned int new_count; unsigned int new_count;
WCHAR **ptr; WCHAR **ptr;
new_count = *count ? *count * 2 : 10; new_count = *capacity ? *capacity * 2 : 10;
ptr = CoTaskMemRealloc(vector->calpwstr.pElems, new_count * sizeof(*vector->calpwstr.pElems)); ptr = CoTaskMemRealloc(vector->calpwstr.pElems, new_count * sizeof(*vector->calpwstr.pElems));
if (!ptr) if (!ptr)
return E_OUTOFMEMORY; return E_OUTOFMEMORY;
vector->calpwstr.pElems = ptr; vector->calpwstr.pElems = ptr;
*count = new_count; *capacity = new_count;
} }
len = lstrlenW(str); len = lstrlenW(str);
@ -1129,12 +1129,14 @@ static HRESULT prop_string_vector_append(PROPVARIANT *vector, unsigned int *coun
static int __cdecl qsort_string_compare(const void *a, const void *b) static int __cdecl qsort_string_compare(const void *a, const void *b)
{ {
return lstrcmpW(a, b); const WCHAR *left = *(const WCHAR **)a, *right = *(const WCHAR **)b;
return lstrcmpW(left, right);
} }
static HRESULT mf_get_handler_strings(const WCHAR *path, WCHAR filter, unsigned int maxlen, PROPVARIANT *dst) static HRESULT mf_get_handler_strings(const WCHAR *path, WCHAR filter, unsigned int maxlen, PROPVARIANT *dst)
{ {
static const HKEY hkey_roots[2] = { HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE }; static const HKEY hkey_roots[2] = { HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE };
unsigned int capacity = 0, count, size;
HRESULT hr = S_OK; HRESULT hr = S_OK;
int i, index; int i, index;
WCHAR *buffW; WCHAR *buffW;
@ -1148,8 +1150,6 @@ static HRESULT mf_get_handler_strings(const WCHAR *path, WCHAR filter, unsigned
for (i = 0; i < ARRAY_SIZE(hkey_roots); ++i) for (i = 0; i < ARRAY_SIZE(hkey_roots); ++i)
{ {
unsigned int count;
DWORD size;
HKEY hkey; HKEY hkey;
if (RegOpenKeyW(hkey_roots[i], path, &hkey)) if (RegOpenKeyW(hkey_roots[i], path, &hkey))
@ -1162,7 +1162,8 @@ static HRESULT mf_get_handler_strings(const WCHAR *path, WCHAR filter, unsigned
{ {
if (filter && !wcschr(buffW, filter)) if (filter && !wcschr(buffW, filter))
continue; continue;
if (FAILED(hr = prop_string_vector_append(dst, &count, i > 0, buffW)))
if (FAILED(hr = prop_string_vector_append(dst, &capacity, i > 0, buffW)))
break; break;
size = maxlen; size = maxlen;
} }