#!/bin/sh

## Copyright (C) 2003 Commonwealth Scientific and Industrial Research
## Organisation (CSIRO) Australia
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions
## are met:
##
## - Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
##
## - Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in the
## documentation and/or other materials provided with the distribution.
##
## - Neither the name of CSIRO Australia nor the names of its
## contributors may be used to endorse or promote products derived from
## this software without specific prior written permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
## PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ORGANISATION OR
## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
## EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
## PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
## PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
## LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
## NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
## SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

version () {
  echo >&2 "oggz-diff version "1.1.1
  exit 1
}

usage () {
  echo >&2 "oggz-diff, diff oggz-dumps of two Ogg files."
  echo >&2
  echo >&2 "Usage: oggz-diff [options] [OGGZDUMP_OPTIONS] [DIFF_OPTIONS] file1.ogg file2.ogg"
  echo >&2
  echo >&2 "options: [--verbose] [-v | --version] [-h | --help]"
  echo >&2
  echo >&2 "Supported oggz-dump and diff options:"
  echo >&2
  echo >&2 "OGGZDUMP_OPTIONS: [-b | --binary] [-x | --hexadecimal]"
  echo >&2 "    [-O | --hide-offset] [-S | --hide-serialno] [-G | --hide-granulepos]"
  echo >&2 "    [-P | --hide-packetno] [-s serialno | --serialno serialno]"
  echo >&2 "    [-c content-type | --content-type content-type]"
  echo >&2
  echo >&2 "DIFF_OPTIONS: [-q | --brief] [-C NUM | --context[=NUM]]"
  echo >&2 "     [-u | -U NUM | --unified[=NUM]] [-e | -ed] [--normal] [--rcs]"
  echo >&2 "     [-y | --side-by-side] [-l | --paginate]"
  echo >&2
  exit 1
}

GETOPTEST=`getopt --version`
case $GETOPTEST in
getopt*) # GNU getopt
  GETOPTARGS="-l verbose -l version -l brief -l context:: -l unified:: -l ed -l normal -l rcs -l side-by-side -l paginate -l binary -l hexadecimal -l serialno: -l content-type: -l hide-offset -l hide-serialno -l hide-granulepos -l hide-packetno -l help -- +qC:uU:eylbxs:c:OSGPhv"
  QARGS="--verbose --version --brief --context --unified --ed --normal --rcs --side-by-side --paginate --binary --hexadecimal --serialno --content-type --hide-offset --hide-serialno --hide-granulepos --hide-packetno --help -q -C -u -U -e -y -l -b -x -s -c -O -S -G -P -h -v"
  ;;
*) # POSIX getopt ?
  GETOPTARGS="qC:uU:eylbxs:c:OSGPhv"
  QARGS="-q -C -u -U -e -y -l -b -x -s -c -O -S -G -P -h -v"
  ;;
esac

# First check for -? option
if test "X$1" = "X-?"; then
  exit 0
fi

TEMP=`getopt $GETOPTARGS "$@"`

if test "$?" != "0"; then
  usage
fi

eval set -- "$TEMP"

DIFFOPTS="-w" # -w, --ignore-all-space
DUMPOPTS=""
VERBOSE=""

while test "X$1" != "X--"; do
  case "$1" in
    -q|--brief)
      DIFFOPTS=$DIFFOPTS" -q"
      ;;
    -C)
      shift
      DIFFOPTS=$DIFFOPTS" -C $1"
      ;;
    --context)
      shift
      if test "x$1" = "x"; then
        DIFFOPTS=$DIFFOPTS" --context"
      else
        DIFFOPTS=$DIFFOPTS" --context=$1"
      fi
      ;;
    -u)
      DIFFOPTS=$DIFFOPTS" -u"
      ;;
    -U)
      shift
      DIFFOPTS=$DIFFOPTS" -U $1"
      ;;
    --unified)
      shift
      if test "x$1" = "x"; then
        DIFFOPTS=$DIFFOPTS" --unified"
      else
        DIFFOPTS=$DIFFOPTS" --unified=$1"
      fi
      ;;
    -e|--ed)
      DIFFOPTS=$DIFFOPTS" -e"
      ;;
    --normal)
      DIFFOPTS=$DIFFOPTS" --normal"
      ;;
    --rcs)
      DIFFOPTS=$DIFFOPTS" --rcs"
      ;;
    -y|--side-by-side)
      DIFFOPTS=$DIFFOPTS" -y"
      ;;
    -l|--paginate)
      DIFFOPTS=$DIFFOPTS" -l"
      ;;
    -b|--binary)
      DUMPOPTS=$DUMPOPTS" -b"
      ;;
    -x|--hexadecimal)
      DUMPOPTS=$DUMPOPTS" -x"
      ;;
    -s|--serialno)
      shift
      DUMPOPTS=$DUMPOPTS" -s $1"
      ;;
    -c)
      shift
      DUMPOPTS=$DUMPOPTS" -c $1"
      ;;
    -O|--hide-offset)
      DUMPOPTS=$DUMPOPTS" -O"
      ;;
    -S|--hide-serialno)
      DUMPOPTS=$DUMPOPTS" -S"
      ;;
    -G|--hide-granulepos)
      DUMPOPTS=$DUMPOPTS" -G"
      ;;
    -P|--hide-packetno)
      DUMPOPTS=$DUMPOPTS" -P"
      ;;
    --verbose)
      VERBOSE="y"
      ;;
    -v|--version)
      version
      ;;
    -h|--help)
      usage
      ;;
  esac
  shift
done

# Check that all options parsed ok
if test "x$1" != "x--"; then
  usage
fi
shift #get rid of the '--'

if test "x$1" = "x"; then
  usage
fi
if test "x$2" = "x"; then
  usage
fi

if test "x$VERBOSE" != "x"; then
  echo >&2 "OGGZDUMP_OPTIONS: " $DUMPOPTS
  echo >&2 "DIFF_OPTIONS: " $DIFFOPTS
fi

FIFO1="${TMPDIR:-/tmp}/`basename $1`.dump-1-$$"
FIFO2="${TMPDIR:-/tmp}/`basename $2`.dump-2-$$"

exec 5>$FIFO1
exec 6>$FIFO2

oggz-dump $DUMPOPTS $1 >&5
if test "$?" != "0"; then
  exit 1
fi

oggz-dump $DUMPOPTS $2 >&6
if test "$?" != "0"; then
  exit 1
fi

diff $DIFFOPTS $FIFO1 $FIFO2
ret=$?

rm $FIFO1 $FIFO2

exit $ret