crypto/aesni_mb: remove check for SSE4
[dpdk.git] / buildtools / relpath.sh
1 #!/bin/sh
2
3 #   BSD LICENSE
4 #
5 #   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
6 #   All rights reserved.
7 #
8 #   Redistribution and use in source and binary forms, with or without
9 #   modification, are permitted provided that the following conditions
10 #   are met:
11 #
12 #     * Redistributions of source code must retain the above copyright
13 #       notice, this list of conditions and the following disclaimer.
14 #     * Redistributions in binary form must reproduce the above copyright
15 #       notice, this list of conditions and the following disclaimer in
16 #       the documentation and/or other materials provided with the
17 #       distribution.
18 #     * Neither the name of Intel Corporation nor the names of its
19 #       contributors may be used to endorse or promote products derived
20 #       from this software without specific prior written permission.
21 #
22 #   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 #   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 #   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 #   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 #   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 #   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 #   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 #   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 #   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 #   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 #   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33
34 #
35 # print the relative path of $1 from $2 directory
36 # $1 and $2 MUST be absolute paths
37 #
38
39 if [ $# -ne 2 ]; then
40         echo "Bad arguments"
41         echo "Usage:"
42         echo "  $0 path1 path2"
43         exit 1
44 fi
45
46 # get the real absolute path, derefencing symlinks
47 ABS1="$(dirname $(readlink -f $1))/$(basename $1)"
48 ABS2=$(readlink -f $2)
49
50 # remove leading slash
51 REL1=${ABS1#/}
52 REL2=${ABS2#/}
53
54 left1=${REL1%%/*}
55 right1=${REL1#*/}
56 prev_right1=$REL1
57 prev_left1=
58
59 left2=${REL2%%/*}
60 right2=${REL2#*/}
61 prev_right2=$REL2
62 prev_left2=
63
64 prefix=
65
66 while [ "${right1}" != "" -a "${right2}" != "" ]; do
67
68         if [ "$left1" != "$left2" ]; then
69                 break
70         fi
71
72         prev_left1=$left1
73         left1=$left1/${right1%%/*}
74         prev_right1=$right1
75         right1=${prev_right1#*/}
76         if [ "$right1" = "$prev_right1" ]; then
77                 right1=""
78         fi
79
80         prev_left2=$left2
81         left2=$left2/${right2%%/*}
82         prev_right2=$right2
83         right2=${prev_right2#*/}
84         if [ "$right2" = "$prev_right2" ]; then
85                 right2=""
86         fi
87 done
88
89 if [ "${left1}" != "${left2}" ]; then
90         right2=${prev_right2}
91         right1=${prev_right1}
92 fi
93
94 while [ "${right2}" != "" ]; do
95         prefix=${prefix}../
96         prev_right2=$right2
97         right2=${right2#*/}
98         if [ "$right2" = "$prev_right2" ]; then
99                 right2=""
100         fi
101 done
102
103 echo ${prefix}${right1}
104
105 exit 0