[reactos] 01/01: [NOTEPAD] Fix and improve DoSaveFile (#5066)

[Katayama Hirofumi MZ]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=97db8a258dc49de5bf8cba...

commit 97db8a258dc49de5bf8cba8c432a9d37be5eacc0
Author:     Katayama Hirofumi MZ [e-mail]
AuthorDate: Mon Feb 13 08:32:09 2023 +0900
Commit:     GitHub [e-mail]
CommitDate: Mon Feb 13 08:32:09 2023 +0900

[NOTEPAD] Fix and improve DoSaveFile (#5066)

- Use EM_GETHANDLE to get the text.
    - Check zero size and handle it elegantly.
    CORE-18832
---
 base/applications/notepad/dialog.c | 41 +++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 21 deletions(-)

diff --git a/base/applications/notepad/dialog.c b/base/applications/notepad/dialog.c
index 06618147121..8233082be1b 100644
--- a/base/applications/notepad/dialog.c
+++ b/base/applications/notepad/dialog.c
@@ -4,6 +4,7 @@
  *  Copyright 1998,99 Marcel Baur [e-mail]
  *  Copyright 2002 Sylvain Petreolle [e-mail]
  *  Copyright 2002 Andriy Palamarchuk
+ *  Copyright 2023 Katayama Hirofumi MZ [e-mail]
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -332,48 +333,46 @@ GetPrintingRect(HDC hdc, RECT margins)

static BOOL DoSaveFile(VOID)
 {
-    BOOL bRet = TRUE;
+    BOOL bRet = FALSE;
     HANDLE hFile;
-    LPTSTR pTemp;
-    DWORD size;
+    DWORD cchText;

-    hFile = CreateFile(Globals.szFileName, GENERIC_WRITE, FILE_SHARE_WRITE,
-                       NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
-    if(hFile == INVALID_HANDLE_VALUE)
+    hFile = CreateFileW(Globals.szFileName, GENERIC_WRITE, FILE_SHARE_WRITE,
+                        NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+    if (hFile == INVALID_HANDLE_VALUE)
     {
         ShowLastError();
         return FALSE;
     }

-    size = GetWindowTextLength(Globals.hEdit) + 1;
-    pTemp = HeapAlloc(GetProcessHeap(), 0, size * sizeof(*pTemp));
-    if (!pTemp)
+    cchText = GetWindowTextLengthW(Globals.hEdit);
+    if (cchText <= 0)
     {
-        CloseHandle(hFile);
-        ShowLastError();
-        return FALSE;
+        bRet = TRUE;
     }
-    size = GetWindowText(Globals.hEdit, pTemp, size);
-
-    if (size)
+    else
     {
-        if (!WriteText(hFile, (LPWSTR)pTemp, size, Globals.encFile, Globals.iEoln))
+        HLOCAL hLocal = (HLOCAL)SendMessageW(Globals.hEdit, EM_GETHANDLE, 0, 0);
+        LPWSTR pszText = LocalLock(hLocal);
+        if (pszText)
         {
-            ShowLastError();
-            bRet = FALSE;
+            bRet = WriteText(hFile, pszText, cchText, Globals.encFile, Globals.iEoln);
+            if (!bRet)
+                ShowLastError();
+
+            LocalUnlock(hLocal);
         }
         else
         {
-            SendMessage(Globals.hEdit, EM_SETMODIFY, FALSE, 0);
-            bRet = TRUE;
+            ShowLastError();
         }
     }

CloseHandle(hFile);
-    HeapFree(GetProcessHeap(), 0, pTemp);

if (bRet)
     {
+        SendMessage(Globals.hEdit, EM_SETMODIFY, FALSE, 0);
         SetFileName(Globals.szFileName);
     }