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#!/bin/bash
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#"======================================================================================="
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#"---------------------------------------------------------------------------------------"
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#" LPP VHDL lib makeDirs "
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#" Copyright (C) 2010 Laboratory of Plasmas Physic. "
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#"======================================================================================="
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#----------------------------------------------------------------------------------------
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# This file is a part of the LPP VHDL IP LIBRARY
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# Copyright (C) 2010, Laboratory of Plasmas Physic - CNRS
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#----------------------------------------------------------------------------------------
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# Full path function
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function fullpath() {
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if test $# -gt 0
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then
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cd $1
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echo `pwd`
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fi
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}
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# Relative path function
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# both $1 and $2 are absolute paths (biginning with /)
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# returns $2 relative to $1
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function relpath() {
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if test $# -gt 1
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then
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source=`fullpath $1`
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target=`fullpath $2`
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common_part=$source # for now
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result="" # for now
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while [[ "${target#$common_part}" == "${target}" ]]; do
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# no match, means that candidate common part is not correct
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# go up one level (reduce common part)
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common_part="$(dirname $common_part)"
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# and record that we went back, with correct / handling
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if [[ -z $result ]]; then
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result=".."
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else
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result="../$result"
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fi
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done
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if [[ $common_part == "/" ]]; then
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# special case for root (no common path)
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result="$result/"
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fi
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# since we now have identified the common part,
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# compute the non-common part
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forward_part="${target#$common_part}"
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# and now stick all parts together
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if [[ -n $result ]] && [[ -n $forward_part ]]; then
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result="$result$forward_part"
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elif [[ -n $forward_part ]]; then
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# extra slash removal
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result="${forward_part:1}"
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fi
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echo $result
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fi
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}
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