[reactos] 01/01: [IMM32] Rewrite ImmGetIMEFileNameA/W (#3822)

[Katayama Hirofumi MZ]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=b06b628f30e2bf616991e…

commit b06b628f30e2bf616991e00b9cad13f0228b29fb
Author:     Katayama Hirofumi MZ <katayama.hirofumi.mz(a)gmail.com>
AuthorDate: Thu Jul 15 23:01:50 2021 +0900
Commit:     GitHub <noreply(a)github.com>
CommitDate: Thu Jul 15 23:01:50 2021 +0900

    [IMM32] Rewrite ImmGetIMEFileNameA/W (#3822)
    
    - Rewrite ImmGetIMEFileNameA and ImmGetIMEFileNameW functions. CORE-11700
---
 dll/win32/imm32/imm.c | 85 +++++++++++++++++++++------------------------------
 1 file changed, 34 insertions(+), 51 deletions(-)

diff --git a/dll/win32/imm32/imm.c b/dll/win32/imm32/imm.c
index 4bcc133ae66..8c40da91928 100644
--- a/dll/win32/imm32/imm.c
+++ b/dll/win32/imm32/imm.c
@@ -2195,32 +2195,31 @@ DWORD WINAPI ImmGetGuideLineW(HIMC hIMC, DWORD dwIndex, LPWSTR
lpBuf, DWORD dwBu
  */
 UINT WINAPI ImmGetIMEFileNameA( HKL hKL, LPSTR lpszFileName, UINT uBufLen)
 {
-    LPWSTR bufW = NULL;
-    UINT wBufLen = uBufLen;
-    UINT rc;
+    BOOL bDefUsed;
+    IMEINFOEX info;
+    size_t cch;
 
-    if (uBufLen && lpszFileName)
-        bufW = HeapAlloc(GetProcessHeap(),0,uBufLen * sizeof(WCHAR));
-    else /* We need this to get the number of byte required */
+    TRACE("ImmGetIMEFileNameA(%p, %p, %u)\n", hKL, lpszFileName, uBufLen);
+
+    if (!ImmGetImeInfoEx(&info, ImeInfoExKeyboardLayout, &hKL) ||
!IS_IME_HKL(hKL))
     {
-        bufW = HeapAlloc(GetProcessHeap(),0,MAX_PATH * sizeof(WCHAR));
-        wBufLen = MAX_PATH;
+        if (uBufLen > 0)
+            lpszFileName[0] = 0;
+        return 0;
     }
 
-    rc = ImmGetIMEFileNameW(hKL,bufW,wBufLen);
+    StringCchLengthW(info.wszImeFile, _countof(info.wszImeFile), &cch);
 
-    if (rc > 0)
-    {
-        if (uBufLen && lpszFileName)
-            rc = WideCharToMultiByte(CP_ACP, 0, bufW, -1, lpszFileName,
-                                 uBufLen, NULL, NULL);
-        else /* get the length */
-            rc = WideCharToMultiByte(CP_ACP, 0, bufW, -1, NULL, 0, NULL,
-                                     NULL);
-    }
+    cch = WideCharToMultiByte(CP_ACP, 0, info.wszImeFile, (INT)cch,
+                              lpszFileName, uBufLen, NULL, &bDefUsed);
+    if (uBufLen == 0)
+        return (UINT)cch;
 
-    HeapFree(GetProcessHeap(),0,bufW);
-    return rc;
+    if (cch > uBufLen - 1)
+        cch = uBufLen - 1;
+
+    lpszFileName[cch] = 0;
+    return (UINT)cch;
 }
 
 /***********************************************************************
@@ -2228,45 +2227,29 @@ UINT WINAPI ImmGetIMEFileNameA( HKL hKL, LPSTR lpszFileName, UINT
uBufLen)
  */
 UINT WINAPI ImmGetIMEFileNameW(HKL hKL, LPWSTR lpszFileName, UINT uBufLen)
 {
-    HKEY hkey;
-    DWORD length;
-    DWORD rc;
-    WCHAR regKey[ARRAY_SIZE(szImeRegFmt)+8];
-
-    wsprintfW( regKey, szImeRegFmt, (ULONG_PTR)hKL );
-    rc = RegOpenKeyW( HKEY_LOCAL_MACHINE, regKey, &hkey);
-    if (rc != ERROR_SUCCESS)
-    {
-        SetLastError(rc);
-        return 0;
-    }
+    IMEINFOEX info;
+    size_t cch;
 
-    length = 0;
-    rc = RegGetValueW(hkey, NULL, szImeFileW, RRF_RT_REG_SZ, NULL, NULL, &length);
+    TRACE("ImmGetIMEFileNameW(%p, %p, %u)\n", hKL, lpszFileName, uBufLen);
 
-    if (rc != ERROR_SUCCESS)
+    if (!ImmGetImeInfoEx(&info, ImeInfoExKeyboardLayout, &hKL) ||
!IS_IME_HKL(hKL))
     {
-        RegCloseKey(hkey);
-        SetLastError(rc);
+        if (uBufLen > 0)
+            lpszFileName[0] = 0;
         return 0;
     }
-    if (length > uBufLen * sizeof(WCHAR) || !lpszFileName)
-    {
-        RegCloseKey(hkey);
-        if (lpszFileName)
-        {
-            SetLastError(ERROR_INSUFFICIENT_BUFFER);
-            return 0;
-        }
-        else
-            return length / sizeof(WCHAR);
-    }
 
-    RegGetValueW(hkey, NULL, szImeFileW, RRF_RT_REG_SZ, NULL, lpszFileName,
&length);
+    StringCchLengthW(info.wszImeFile, _countof(info.wszImeFile), &cch);
+    if (uBufLen == 0)
+        return (UINT)cch;
+
+    StringCchCopyNW(lpszFileName, uBufLen, info.wszImeFile, cch);
 
-    RegCloseKey(hkey);
+    if (cch > uBufLen - 1)
+        cch = uBufLen - 1;
 
-    return length / sizeof(WCHAR);
+    lpszFileName[cch] = 0;
+    return (UINT)cch;
 }
 
 /***********************************************************************