[PATCH 0/2] MR340: regedit: Fix broken handling of REG_DWORD and REG_QWORD values

[PATCH 1/2] regedit: Pass correct data size when adding a new value via the GUI

[Hugh McMaster]

From: Hugh McMaster

This bug was exposed by 3b1faf59f60c2e5d91321fd8998dd81d90a13e11

Signed-off-by: Hugh McMaster 
---
 programs/regedit/edit.c | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/programs/regedit/edit.c b/programs/regedit/edit.c
index c19ef1506fa..47ce233039e 100644
--- a/programs/regedit/edit.c
+++ b/programs/regedit/edit.c
@@ -443,6 +443,7 @@ BOOL CreateValue(HWND hwnd, HKEY hKeyRoot, LPCWSTR keyPath, DWORD valueType, LPW
     LONG lRet = ERROR_SUCCESS;
     WCHAR newValue[256];
     UINT64 value = 0;
+    DWORD size_bytes;
     BOOL result = FALSE;
     int valueNum, index;
     HKEY hKey;
@@ -466,15 +467,34 @@ BOOL CreateValue(HWND hwnd, HKEY hKeyRoot, LPCWSTR keyPath, DWORD valueType, LPW
         error_code_messagebox(hwnd, IDS_CREATE_VALUE_FAILED);
    goto done;
     }
-   
-    lRet = RegSetValueExW(hKey, valueName, 0, valueType, (BYTE *)&value, sizeof(value));
+
+    switch (valueType)
+    {
+        case REG_DWORD:
+        case REG_DWORD_BIG_ENDIAN:
+            size_bytes = sizeof(DWORD);
+            break;
+        case REG_QWORD:
+            size_bytes = sizeof(UINT64);
+            break;
+        case REG_BINARY:
+            size_bytes = 0;
+            break;
+        case REG_MULTI_SZ:
+            size_bytes = 2 * sizeof(WCHAR);
+            break;
+        default: /* REG_NONE, REG_SZ, REG_EXPAND_SZ */
+            size_bytes = sizeof(WCHAR);
+    }
+
+    lRet = RegSetValueExW(hKey, valueName, 0, valueType, (BYTE *)&value, size_bytes);
     if (lRet) {
         error_code_messagebox(hwnd, IDS_CREATE_VALUE_FAILED);
    goto done;
     }

/* Add the new item to the listview */
-    index = AddEntryToList(g_pChildWnd->hListWnd, valueName, valueType, (BYTE *)&value, sizeof(value), -1);
+    index = AddEntryToList(g_pChildWnd->hListWnd, valueName, valueType, (BYTE *)&value, size_bytes, -1);
     item.state = LVIS_FOCUSED | LVIS_SELECTED;
     item.stateMask = LVIS_FOCUSED | LVIS_SELECTED;
     SendMessageW(g_pChildWnd->hListWnd, LVM_SETITEMSTATE, index, (LPARAM)&item);

[PATCH 2/2] regedit: Use correct printf specifier for UINT64 (QWORD) values

[Hugh McMaster]

From: Hugh McMaster

Signed-off-by: Hugh McMaster 
---
 programs/regedit/listview.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/programs/regedit/listview.c b/programs/regedit/listview.c
index e314862ee6f..7841f244202 100644
--- a/programs/regedit/listview.c
+++ b/programs/regedit/listview.c
@@ -122,7 +122,7 @@ void format_value_data(HWND hwndLV, int index, DWORD type, void *data, DWORD siz
         {
             UINT64 value = *(UINT64 *)data;
             WCHAR buf[64];
-            swprintf(buf, ARRAY_SIZE(buf), L"0x%08Ix (%Iu)", value, value);
+            swprintf(buf, ARRAY_SIZE(buf), L"0x%08llx (%llIu)", value, value);
             ListView_SetItemTextW(hwndLV, index, 2, buf);
             break;
         }

[eric pouech (＠epo)]

in first patch:
- %llIu doesn't exist, I suppose you meant %llu... I'd suggest using %I64x and %I64u instead (IIRC %llu isn't supported in all versions of msvcrt on Windows)

(and yes it's a pain that mingw doesn't support __attribute__(format) for wide chars, that should have generated warnings here)

[Hugh McMaster (＠hmc)]

It's actually two Ls and I, not triple L. If `%llu` might cause an issue, I'll update the MR to use `%I64u`.