Function OsPathPeerFilePath

BaseTools/Source/C/Common/OsPath.c:204–260

CHAR8*
OsPathPeerFilePath (
  IN CHAR8    *OldPath,
  IN CHAR8    *Peer
  )
/*++

Routine Description:

  This function replaces the final portion of a path with an alternative
  'peer' filename.  For example:
    "a/b/../c", "peer" -> "a/b/../peer"
    "a/b/", "peer"     -> "a/b/peer"
    "/a", "peer"       -> "/peer"
    "a", "peer"        -> "peer"

  This function does not check for the existence of the file.

Arguments:

  OldPath     Path name of replace the final segment
  Peer        The new path name to concatenate to become the peer path

Returns:

  A CHAR8* string, which must be freed by the caller

--*/
{
  CHAR8 *Result;
  INTN    Offset;

  Result = (CHAR8 *) malloc (strlen (OldPath) + strlen (Peer) + 1);
  if (Result == NULL) {
    return NULL;
  }

  strcpy (Result, OldPath);

  //
  // Search for the last '/' or '\' in the string.  If found, replace
  // everything following it with Peer
  //
  for (Offset = strlen (Result); Offset >= 0; Offset--) {
    if ((Result[Offset] == '/') || (Result[Offset] == '\\')) {
      Result[Offset + 1] = '\0';
      strcat (Result, Peer);
      return Result;
    }
  }

  //
  // Neither a '/' nor a '\' was found.  Therefore, we simply return Peer.
  //
  strcpy (Result, Peer);
  return Result;
}