dll/shellext/fontext/fontpidl.cpp

   1 /*
   2  * PROJECT:     ReactOS Font Shell Extension
   3  * LICENSE:     GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
   4  * PURPOSE:     pidl handling
   5  * COPYRIGHT:   Copyright 2019,2020 Mark Jansen (mark.jansen@reactos.org)
   6  */
   7
   8 #include "precomp.h"
   9
  10 LPITEMIDLIST _ILCreate(LPCWSTR lpString, ULONG Index)
  11 {
  12     // Because the FontPidlEntry contains one WCHAR, we do not need to take the null terminator into account
  13     size_t cbData = sizeof(FontPidlEntry) + wcslen(lpString) * sizeof(WCHAR);
  14     FontPidlEntry* pidl = (FontPidlEntry*)CoTaskMemAlloc(cbData + sizeof(WORD));
  15     if (!pidl)
  16         return NULL;
  17
  18     ZeroMemory(pidl, cbData + sizeof(WORD));
  19
  20     pidl->cb = (WORD)cbData;
  21     pidl->Magic = 'fp';
  22     pidl->Index = Index;
  23
  24     wcscpy(pidl->Name, lpString);
  25     // Should be zero already, but make sure it is
  26     *(WORD*)((char*)pidl + cbData) = 0;
  27
  28     return (LPITEMIDLIST)pidl;
  29 }
  30
  31
  32 const FontPidlEntry* _FontFromIL(LPCITEMIDLIST pidl)
  33 {
  34     const FontPidlEntry* fontEntry = (const FontPidlEntry*)pidl;
  35     if (fontEntry->Magic == 'fp')
  36         return fontEntry;
  37     return NULL;
  38 }