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advapi32: Factor out load_mui_string(). 

Signed-off-by: Akihiro Sagawa <sagawa.aki@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Akihiro Sagawa 2019-05-24 22:32:31 +09:00 committed by Alexandre Julliard
parent 1ca4ecadec
commit ed16573795
1 changed files with 52 additions and 31 deletions
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83
dlls/advapi32/registry.c
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@ -3112,7 +3112,7 @@ LSTATUS WINAPI RegOpenUserClassesRoot(
* avoid importing user32, which is higher level than advapi32. Helper for
* RegLoadMUIString.
*/
static LONG load_string(HINSTANCE hModule, UINT resId, LPWSTR pwszBuffer, INT cMaxChars, UINT *reqChars)
static INT load_string(HINSTANCE hModule, UINT resId, LPWSTR *pResString)
{
HGLOBAL hMemory;
HRSRC hResource;
@ -3125,27 +3125,61 @@ static LONG load_string(HINSTANCE hModule, UINT resId, LPWSTR pwszBuffer, INT cM
/* 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 ERROR_FILE_NOT_FOUND;
if (!hResource) return 0;
hMemory = LoadResource(hModule, hResource);
if (!hMemory) return ERROR_FILE_NOT_FOUND;
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;
*reqChars = *pString + 1;
/* If no buffer is given, return here. */
if (!pwszBuffer) return ERROR_MORE_DATA;
*pResString = pString + 1;
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] = '\0';
static LONG load_mui_string(const WCHAR *file_name, UINT res_id, WCHAR *buffer, INT max_chars, INT *req_chars)
{
HMODULE hModule = NULL;
WCHAR *string;
int size;
LONG result;
/* Verify the file existence. i.e. We don't rely on PATH variable */
if (GetFileAttributesW(file_name) == INVALID_FILE_ATTRIBUTES)
return ERROR_FILE_NOT_FOUND;
/* Load the file */
hModule = LoadLibraryExW(file_name, NULL,
LOAD_LIBRARY_AS_DATAFILE | LOAD_LIBRARY_AS_IMAGE_RESOURCE);
if (!hModule)
return ERROR_BADKEY;
size = load_string(hModule, res_id, &string);
if (!size) {
result = ERROR_FILE_NOT_FOUND;
goto cleanup;
}
*req_chars = size + 1;
/* If no buffer is given, skip copying. */
if (!buffer) {
result = ERROR_MORE_DATA;
goto cleanup;
}
return ERROR_SUCCESS;
/* Else copy over the string, respecting the buffer size. */
max_chars = (size < max_chars) ? size : (max_chars - 1);
if (max_chars >= 0) {
memcpy(buffer, string, max_chars * sizeof(WCHAR));
buffer[max_chars] = '\0';
}
result = ERROR_SUCCESS;
cleanup:
if (hModule) FreeLibrary(hModule);
return result;
}
/******************************************************************************
@ -3229,7 +3263,7 @@ LSTATUS WINAPI RegLoadMUIStringW(HKEY hKey, LPCWSTR pwszValue, LPWSTR pwszBuffer
const WCHAR backslashW[] = {'\\',0};
UINT uiStringId;
DWORD baseDirLen;
HMODULE hModule;
int reqChars;
/* Format of the expanded value is 'path_to_dll,-resId' */
if (!pComma || pComma[1] != '-') {
@ -3257,24 +3291,11 @@ LSTATUS WINAPI RegLoadMUIStringW(HKEY hKey, LPCWSTR pwszValue, LPWSTR pwszBuffer
}
strcatW(pwszTempBuffer, pwszExpandedBuffer + 1);
/* Verify the file existence. i.e. We don't rely on PATH variable */
if (GetFileAttributesW(pwszTempBuffer) == INVALID_FILE_ATTRIBUTES) {
result = ERROR_FILE_NOT_FOUND;
goto cleanup;
}
/* Load the file */
hModule = LoadLibraryExW(pwszTempBuffer, NULL,
LOAD_LIBRARY_AS_DATAFILE | LOAD_LIBRARY_AS_IMAGE_RESOURCE);
if (hModule) {
DWORD reqChars;
result = load_string(hModule, uiStringId, pwszBuffer, cbBuffer/sizeof(WCHAR), &reqChars);
if (pcbData && (result == ERROR_SUCCESS || result == ERROR_MORE_DATA))
*pcbData = reqChars * sizeof(WCHAR);
FreeLibrary(hModule);
}
else
result = ERROR_BADKEY;
/* Load specified string from the file */
reqChars = 0;
result = load_mui_string(pwszTempBuffer, uiStringId, pwszBuffer, cbBuffer/sizeof(WCHAR), &reqChars);
if (pcbData && (result == ERROR_SUCCESS || result == ERROR_MORE_DATA))
*pcbData = reqChars * sizeof(WCHAR);
}
cleanup: