dlls/kernelbase/path.c

   1 /*
   2  * Copyright 2018 Nikolay Sivov
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <stdarg.h>
  20
  21 #include "windef.h"
  22 #include "winbase.h"
  23 #include "pathcch.h"
  24 #include "strsafe.h"
  25
  26 #include "wine/debug.h"
  27 #include "wine/unicode.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(path);
  30
  31 HRESULT WINAPI PathCchAddBackslash(WCHAR *path, SIZE_T size)
  32 {
  33     return PathCchAddBackslashEx(path, size, NULL, NULL);
  34 }
  35
  36 HRESULT WINAPI PathCchAddBackslashEx(WCHAR *path, SIZE_T size, WCHAR **endptr, SIZE_T *remaining)
  37 {
  38     BOOL needs_termination;
  39     SIZE_T length;
  40
  41     TRACE("%s, %lu, %p, %p\n", debugstr_w(path), size, endptr, remaining);
  42
  43     length = strlenW(path);
  44     needs_termination = size && length && path[length - 1] != '\\';
  45
  46     if (length >= (needs_termination ? size - 1 : size))
  47     {
  48         if (endptr) *endptr = NULL;
  49         if (remaining) *remaining = 0;
  50         return STRSAFE_E_INSUFFICIENT_BUFFER;
  51     }
  52
  53     if (!needs_termination)
  54     {
  55         if (endptr) *endptr = path + length;
  56         if (remaining) *remaining = size - length;
  57         return S_FALSE;
  58     }
  59
  60     path[length++] = '\\';
  61     path[length] = 0;
  62
  63     if (endptr) *endptr = path + length;
  64     if (remaining) *remaining = size - length;
  65
  66     return S_OK;
  67 }