#!/bin/bash
#
# Copyright (C) 2009 Red Hat, Inc.
# Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
#
# 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.
#
# This program is distributed in the hope that it would 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 <http://www.gnu.org/licenses/>.
#
#
# standard filters
#

# Checks that given_value is in range of correct_value +/- tolerance.
# Tolerance can be an absolute value or a percentage of the correct value
# (see examples with tolerances below).
# Outputs suitable message to stdout if it's not in range.
#
# A verbose option, -v, may be used as the LAST argument
#
# e.g.
# foo: 0.0298 = 0.03 +/- 5%
# _within_tolerance "foo" 0.0298 0.03 5%
#
# foo: 0.0298 = 0.03 +/- 0.01
# _within_tolerance "foo" 0.0298 0.03 0.01
#
# foo: 0.0298 = 0.03 -0.01 +0.002
# _within_tolerance "foo" 0.0298 0.03 0.01 0.002
#
# foo: verbose output of 0.0298 = 0.03 +/- 5%
# _within_tolerance "foo" 0.0298 0.03 5% -v
_within_tolerance()
{
  _name=$1
  _given_val=$2
  _correct_val=$3
  _mintol=$4
  _maxtol=$_mintol
  _verbose=0
  _debug=false

  # maxtol arg is optional
  # verbose arg is optional
  if [ $# -ge 5 ]
  then
     if [ "$5" = "-v" ]
     then
        _verbose=1
     else
        _maxtol=$5
     fi
  fi
  if [ $# -ge 6 ]
  then
     [ "$6" = "-v" ] && _verbose=1
  fi

  # find min with or without %
  _mintolerance=`echo $_mintol | sed -e 's/%//'`
  if [ $_mintol = $_mintolerance ]
  then
      _min=`echo "scale=5; $_correct_val-$_mintolerance" | bc`
  else
      _min=`echo "scale=5; $_correct_val-$_mintolerance*0.01*$_correct_val" | bc`
  fi

  # find max with or without %
  _maxtolerance=`echo $_maxtol | sed -e 's/%//'`
  if [ $_maxtol = $_maxtolerance ]
  then
      _max=`echo "scale=5; $_correct_val+$_maxtolerance" | bc`
  else
      _max=`echo "scale=5; $_correct_val+$_maxtolerance*0.01*$_correct_val" | bc`
  fi

  $_debug && echo "min = $_min"
  $_debug && echo "max = $_max"

  cat <<EOF >$tmp.bc.1
scale=5;
if ($_min <= $_given_val) 1;
if ($_min > $_given_val) 0;
EOF

  cat <<EOF >$tmp.bc.2
scale=5;
if ($_given_val <= $_max) 1;
if ($_given_val > $_max) 0;
EOF

  _above_min=`bc <$tmp.bc.1`
  _below_max=`bc <$tmp.bc.2`

  rm -f $tmp.bc.[12]

  _in_range=`expr $_above_min \& $_below_max`

  # fix up min, max precision for output
  # can vary for 5.3, 6.2
  _min=`echo $_min | sed -e 's/0*$//'` # get rid of trailling zeroes
  _max=`echo $_max | sed -e 's/0*$//'` # get rid of trailling zeroes

  if [ $_in_range -eq 1 ]
  then
        [ $_verbose -eq 1 ] && echo $_name is in range
        return 0
  else
        [ $_verbose -eq 1 ] && echo $_name has value of $_given_val
        [ $_verbose -eq 1 ] && echo $_name is NOT in range $_min .. $_max
        return 1
  fi
}

# ctime(3) dates
#
_filter_date()
{
    sed \
        -e 's/[A-Z][a-z][a-z] [A-z][a-z][a-z]  *[0-9][0-9]* [0-9][0-9]:[0-9][0-9]:[0-9][0-9] [0-9][0-9][0-9][0-9]$/DATE/'
}

_filter_generated_node_ids()
{
     sed -re 's/\#block[0-9]{3,}/NODE_NAME/'
}

# replace occurrences of the actual TEST_DIR value with TEST_DIR
_filter_testdir()
{
    sed -e "s#$TEST_DIR#TEST_DIR#g"
}

# replace occurrences of the actual IMGFMT value with IMGFMT
_filter_imgfmt()
{
    sed -e "s#$IMGFMT#IMGFMT#g"
}

# Removes \r from messages
_filter_win32()
{
    sed -e 's/\r//g'
}

# sanitize qemu-io output
_filter_qemu_io()
{
    _filter_win32 | sed -e "s/[0-9]* ops\; [0-9/:. sec]* ([0-9/.inf]* [EPTGMKiBbytes]*\/sec and [0-9/.inf]* ops\/sec)/X ops\; XX:XX:XX.X (XXX YYY\/sec and XXX ops\/sec)/" \
        -e "s/: line [0-9][0-9]*:  *[0-9][0-9]*\( Aborted\| Killed\)/:\1/" \
        -e "s/qemu-io> //g"
}

# replace occurrences of QEMU_PROG with "qemu"
_filter_qemu()
{
    sed -e "s#\\(^\\|(qemu) \\)$(basename $QEMU_PROG):#\1QEMU_PROG:#" \
        -e 's#^QEMU [0-9]\+\.[0-9]\+\.[0-9]\+ monitor#QEMU X.Y.Z monitor#' \
        -e '/main-loop: WARNING: I\/O thread spun for [0-9]\+ iterations/d' \
        -e $'s#\r##' # QEMU monitor uses \r\n line endings
}

# replace problematic QMP output like timestamps
_filter_qmp()
{
    _filter_win32 | \
    sed -e 's#\("\(micro\)\?seconds": \)[0-9]\+#\1 TIMESTAMP#g' \
        -e 's#^{"QMP":.*}$#QMP_VERSION#' \
        -e '/^    "QMP": {\s*$/, /^    }\s*$/ c\' \
        -e '    QMP_VERSION'
}

# replace driver-specific options in the "Formatting..." line
_filter_img_create()
{
    sed -e "s#$IMGPROTO:$TEST_DIR#TEST_DIR#g" \
        -e "s#$TEST_DIR#TEST_DIR#g" \
        -e "s#$IMGFMT#IMGFMT#g" \
        -e "s# encryption=off##g" \
        -e "s# cluster_size=[0-9]\\+##g" \
        -e "s# table_size=[0-9]\\+##g" \
        -e "s# compat=[^ ]*##g" \
        -e "s# compat6=\\(on\\|off\\)##g" \
        -e "s# static=\\(on\\|off\\)##g" \
        -e "s# zeroed_grain=\\(on\\|off\\)##g" \
        -e "s# subformat='[^']*'##g" \
        -e "s# adapter_type='[^']*'##g" \
        -e "s# lazy_refcounts=\\(on\\|off\\)##g" \
        -e "s# block_size=[0-9]\\+##g" \
        -e "s# block_state_zero=\\(on\\|off\\)##g" \
        -e "s# log_size=[0-9]\\+##g" \
        -e "s/archipelago:a/TEST_DIR\//g" \
        -e "s# refcount_bits=[0-9]\\+##g"
}

_filter_img_info()
{
    sed -e "s#$IMGPROTO:$TEST_DIR#TEST_DIR#g" \
        -e "s#$TEST_DIR#TEST_DIR#g" \
        -e "s#$IMGFMT#IMGFMT#g" \
        -e 's#nbd://127.0.0.1:10810$#TEST_DIR/t.IMGFMT#g' \
        -e "/encrypted: yes/d" \
        -e "/cluster_size: [0-9]\\+/d" \
        -e "/table_size: [0-9]\\+/d" \
        -e "/compat: '[^']*'/d" \
        -e "/compat6: \\(on\\|off\\)/d" \
        -e "/static: \\(on\\|off\\)/d" \
        -e "/zeroed_grain: \\(on\\|off\\)/d" \
        -e "/subformat: '[^']*'/d" \
        -e "/adapter_type: '[^']*'/d" \
        -e "/lazy_refcounts: \\(on\\|off\\)/d" \
        -e "/block_size: [0-9]\\+/d" \
        -e "/block_state_zero: \\(on\\|off\\)/d" \
        -e "/log_size: [0-9]\\+/d" \
        -e "s/archipelago:a/TEST_DIR\//g"
}

# filter out offsets and file names from qemu-img map
_filter_qemu_img_map()
{
    sed -e 's/\([0-9a-fx]* *[0-9a-fx]* *\)[0-9a-fx]* */\1/g' \
        -e 's/Mapped to *//' | _filter_testdir | _filter_imgfmt
}

_filter_nbd()
{
    # nbd.c error messages contain function names and line numbers that are
    # prone to change.  Message ordering depends on timing between send and
    # receive callbacks sometimes, making them unreliable.
    #
    # Filter out the TCP port number since this changes between runs.
    sed -e '/nbd\/.*\.c:/d' \
        -e 's#nbd:\(//\)\?127\.0\.0\.1:[0-9]*#nbd:\1127.0.0.1:PORT#g' \
        -e "s#?socket=$TEST_DIR#?socket=TEST_DIR#g" \
        -e 's#\(exportname=foo\|PORT\): Failed to .*$#\1#'
}

# make sure this script returns success
true