[gadamopoulos] 58809: [desk.cpl] - Add missing file - In desk.cpl we now use RegLoadMUIStringW however this function is introduced in vista. Since we don't have an official policy what to do in suc...

Author: gadamopoulos
Date: Sun Apr 21 14:42:16 2013
New Revision: 58809
URL: http://svn.reactos.org/svn/reactos?rev=58809&view=rev
Log:
[desk.cpl]
- Add missing file
- In desk.cpl we now use RegLoadMUIStringW however this function is introduced in vista.
Since we don't have an official policy what to do in such cases I chose to create a
local copy of this function here becasue it also lets us test desk.cpl in xp
Added:
    trunk/reactos/dll/cpl/desk/muireg.c   (with props)
Added: trunk/reactos/dll/cpl/desk/muireg.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/cpl/desk/muireg.c?rev=…
==============================================================================
--- trunk/reactos/dll/cpl/desk/muireg.c (added)
+++ trunk/reactos/dll/cpl/desk/muireg.c [iso-8859-1] Sun Apr 21 14:42:16 2013
@@ -1,0 +1,144 @@
+#include "desk.h"
+
+/******************************************************************************
+ * load_string [Internal]
+ *
+ * This is basically a copy of user32/resource.c's LoadStringW. Necessary to
+ * avoid importing user32, which is higher level than advapi32. Helper for
+ * RegLoadMUIString.
+ */
+static int load_string(HINSTANCE hModule, UINT resId, LPWSTR pwszBuffer, INT cMaxChars)
+{
+    HGLOBAL hMemory;
+    HRSRC hResource;
+    WCHAR *pString;
+    int idxString;
+
+    /* Negative values have to be inverted. */
+    if (HIWORD(resId) == 0xffff)
+        resId = (UINT)(-((INT)resId));
+
+    /* Load the resource into memory and get a pointer to it. */
+    hResource = FindResourceW(hModule, MAKEINTRESOURCEW(LOWORD(resId >> 4) + 1),
(LPWSTR)RT_STRING);
+    if (!hResource) return 0;
+    hMemory = LoadResource(hModule, hResource);
+    if (!hMemory) return 0;
+    pString = LockResource(hMemory);
+
+    /* Strings are length-prefixed. Lowest nibble of resId is an index. */
+    idxString = resId & 0xf;
+    while (idxString--) pString += *pString + 1;
+
+    /* If no buffer is given, return length of the string. */
+    if (!pwszBuffer) return *pString;
+
+    /* Else copy over the string, respecting the buffer size. */
+    cMaxChars = (*pString < cMaxChars) ? *pString : (cMaxChars - 1);
+    if (cMaxChars >= 0)
+    {
+        memcpy(pwszBuffer, pString+1, cMaxChars * sizeof(WCHAR));
+        pwszBuffer[cMaxChars] = L'\0';
+    }
+
+    return cMaxChars;
+}
+
+
+/************************************************************************
+ *  RegLoadMUIStringW
+ *
+ * @implemented
+ */
+LONG
+RegLoadMUIStringW(IN HKEY hKey,
+                  IN LPCWSTR pszValue  OPTIONAL,
+                  OUT LPWSTR pszOutBuf,
+                  IN DWORD cbOutBuf,
+                  OUT LPDWORD pcbData OPTIONAL,
+                  IN DWORD Flags,
+                  IN LPCWSTR pszDirectory  OPTIONAL)
+{
+    DWORD dwValueType, cbData;
+    LPWSTR pwszTempBuffer = NULL, pwszExpandedBuffer = NULL;
+    LONG result;
+
+    /* Parameter sanity checks. */
+    if (!hKey || !pszOutBuf)
+        return ERROR_INVALID_PARAMETER;
+
+    if (pszDirectory && *pszDirectory)
+    {
+        //FIXME("BaseDir parameter not yet supported!\n");
+        return ERROR_INVALID_PARAMETER;
+    }
+
+    /* Check for value existence and correctness of it's type, allocate a buffer and
load it. */
+    result = RegQueryValueExW(hKey, pszValue, NULL, &dwValueType, NULL, &cbData);
+    if (result != ERROR_SUCCESS) goto cleanup;
+    if (!(dwValueType == REG_SZ || dwValueType == REG_EXPAND_SZ) || !cbData)
+    {
+        result = ERROR_FILE_NOT_FOUND;
+        goto cleanup;
+    }
+    pwszTempBuffer = HeapAlloc(GetProcessHeap(), 0, cbData);
+    if (!pwszTempBuffer)
+    {
+        result = ERROR_NOT_ENOUGH_MEMORY;
+        goto cleanup;
+    }
+    result = RegQueryValueExW(hKey, pszValue, NULL, &dwValueType,
(LPBYTE)pwszTempBuffer, &cbData);
+    if (result != ERROR_SUCCESS) goto cleanup;
+
+    /* Expand environment variables, if appropriate, or copy the original string over. */
+    if (dwValueType == REG_EXPAND_SZ)
+    {
+        cbData = ExpandEnvironmentStringsW(pwszTempBuffer, NULL, 0) * sizeof(WCHAR);
+        if (!cbData) goto cleanup;
+        pwszExpandedBuffer = HeapAlloc(GetProcessHeap(), 0, cbData);
+        if (!pwszExpandedBuffer)
+        {
+            result = ERROR_NOT_ENOUGH_MEMORY;
+            goto cleanup;
+        }
+        ExpandEnvironmentStringsW(pwszTempBuffer, pwszExpandedBuffer, cbData);
+    }
+    else
+    {
+        pwszExpandedBuffer = HeapAlloc(GetProcessHeap(), 0, cbData);
+        memcpy(pwszExpandedBuffer, pwszTempBuffer, cbData);
+    }
+
+    /* If the value references a resource based string, parse the value and load the
string.
+     * Else just copy over the original value. */
+    result = ERROR_SUCCESS;
+    if (*pwszExpandedBuffer != L'@') /* '@' is the prefix for resource
based string entries. */
+    {
+        lstrcpynW(pszOutBuf, pwszExpandedBuffer, cbOutBuf / sizeof(WCHAR));
+    }
+    else
+    {
+        WCHAR *pComma = wcsrchr(pwszExpandedBuffer, L',');
+        UINT uiStringId;
+        HMODULE hModule;
+
+        /* Format of the expanded value is 'path_to_dll,-resId' */
+        if (!pComma || pComma[1] != L'-')
+        {
+            result = ERROR_BADKEY;
+            goto cleanup;
+        }
+
+        uiStringId = _wtoi(pComma+2);
+        *pComma = L'\0';
+
+        hModule = LoadLibraryExW(pwszExpandedBuffer + 1, NULL, LOAD_LIBRARY_AS_DATAFILE);
+        if (!hModule || !load_string(hModule, uiStringId, pszOutBuf, cbOutBuf /
sizeof(WCHAR)))
+            result = ERROR_BADKEY;
+        FreeLibrary(hModule);
+    }
+
+cleanup:
+    HeapFree(GetProcessHeap(), 0, pwszTempBuffer);
+    HeapFree(GetProcessHeap(), 0, pwszExpandedBuffer);
+    return result;
+}
Propchange: trunk/reactos/dll/cpl/desk/muireg.c
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