#! /bin/sh
# The next line is executed by /bin/sh, but not Tcl \
exec tclsh $0 ${1+"$@"}

# OpenSTA, Static Timing Analyzer
# Copyright (c) 2019, Parallax Software, Inc.
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

proc find_parent_dir { dir } {
  if { $dir == "." } {
    return ".."
  } else {
    set path [file split $dir]
    set path_len [llength $path]
    if { $path_len == 1 } {
      return "."
    } else {
      set path_len2 [expr $path_len - 2]
      return [eval file join [lrange $path 0 $path_len2]]
    }
  }
}