FilePaths.c

Go to the documentation of this file.

 
#include  <Library/BaseMemoryLib.h>
#include  <Library/BaseLib.h>
 
BOOLEAN
EFIAPI
PathRemoveLastItem (
  IN OUT CHAR16  *Path
  )
{
  CHAR16  *Walker;
  CHAR16  *LastSlash;
 
  //
  // get directory name from path... ('chop' off extra)
  //
  for ( Walker = Path, LastSlash = NULL
        ; Walker != NULL && *Walker != CHAR_NULL
        ; Walker++
        )
  {
    if ((*Walker == L'\\') && (*(Walker + 1) != CHAR_NULL)) {
      LastSlash = Walker+1;
    } else if ((*Walker == L':') && (*(Walker + 1) != L'\\') && (*(Walker + 1) != CHAR_NULL)) {
      LastSlash = Walker+1;
    }
  }
 
  if (LastSlash != NULL) {
    *LastSlash = CHAR_NULL;
    return (TRUE);
  }
 
  return (FALSE);
}
 
CHAR16 *
EFIAPI
PathCleanUpDirectories (
  IN CHAR16  *Path
  )
{
  CHAR16  *TempString;
 
  if (Path == NULL) {
    return NULL;
  }
 
  //
  // Replace the '/' with '\'
  //
  for (TempString = Path; *TempString != CHAR_NULL; TempString++) {
    if (*TempString == L'/') {
      *TempString = L'\\';
    }
  }
 
  //
  // Replace the "\\" with "\"
  //
  while ((TempString = StrStr (Path, L"\\\\")) != NULL) {
    CopyMem (TempString, TempString + 1, StrSize (TempString + 1));
  }
 
  //
  // Remove all the "\.". E.g.: fs0:\abc\.\def\.
  //
  while ((TempString = StrStr (Path, L"\\.\\")) != NULL) {
    CopyMem (TempString, TempString + 2, StrSize (TempString + 2));
  }
 
  if ((StrLen (Path) >= 2) && (StrCmp (Path + StrLen (Path) - 2, L"\\.") == 0)) {
    Path[StrLen (Path) - 1] = CHAR_NULL;
  }
 
  //
  // Remove all the "\..". E.g.: fs0:\abc\..\def\..
  //
  while (((TempString = StrStr (Path, L"\\..")) != NULL) &&
         ((*(TempString + 3) == L'\\') || (*(TempString + 3) == CHAR_NULL))
         )
  {
    *(TempString + 1) = CHAR_NULL;
    PathRemoveLastItem (Path);
    if (*(TempString + 3) != CHAR_NULL) {
      CopyMem (Path + StrLen (Path), TempString + 4, StrSize (TempString + 4));
    }
  }
 
  return Path;
}