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user32: WM_GETTEXT message converters have to 0-terminate output buffer if there is enough space even if there is no text to convert.

This commit is contained in:
Dmitry Timoshkov 2007-03-22 19:08:21 +08:00 committed by Alexandre Julliard
parent 928d28f688
commit b9eb76dea0
1 changed files with 10 additions and 5 deletions
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9
dlls/user32/winproc.c
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@ -856,8 +856,10 @@ LRESULT WINPROC_CallProcAtoW( winproc_callback_t callback, HWND hwnd, UINT msg,
if (!(ptr = get_buffer( buffer, sizeof(buffer), len ))) break; if (!(ptr = get_buffer( buffer, sizeof(buffer), len ))) break;
ret = callback( hwnd, msg, wParam, (LPARAM)ptr, result, arg ); ret = callback( hwnd, msg, wParam, (LPARAM)ptr, result, arg );
if (*result && wParam) if (wParam)
{ {
len = 0;
if (*result)
RtlUnicodeToMultiByteN( str, wParam - 1, &len, ptr, strlenW(ptr) * sizeof(WCHAR) ); RtlUnicodeToMultiByteN( str, wParam - 1, &len, ptr, strlenW(ptr) * sizeof(WCHAR) );
str[len] = 0; str[len] = 0;
*result = len; *result = len;
@ -1091,10 +1093,13 @@ static LRESULT WINPROC_CallProcWtoA( winproc_callback_t callback, HWND hwnd, UIN
if (!(ptr = get_buffer( buffer, sizeof(buffer), len ))) break; if (!(ptr = get_buffer( buffer, sizeof(buffer), len ))) break;
ret = callback( hwnd, msg, wParam, (LPARAM)ptr, result, arg ); ret = callback( hwnd, msg, wParam, (LPARAM)ptr, result, arg );
if (*result && len) if (len)
{
if (*result)
{ {
RtlMultiByteToUnicodeN( (LPWSTR)lParam, wParam*sizeof(WCHAR), &len, ptr, strlen(ptr)+1 ); RtlMultiByteToUnicodeN( (LPWSTR)lParam, wParam*sizeof(WCHAR), &len, ptr, strlen(ptr)+1 );
*result = len/sizeof(WCHAR) - 1; /* do not count terminating null */ *result = len/sizeof(WCHAR) - 1; /* do not count terminating null */
}
((LPWSTR)lParam)[*result] = 0; ((LPWSTR)lParam)[*result] = 0;
} }
free_buffer( buffer, ptr ); free_buffer( buffer, ptr );