#!/bin/bash
if [ $# == 0 ]
then
   cat << EOF
miniprohex by Al Williams http://www.awce.com
Usage:
  miniprohex [--offset offset] [--unfill byte size] [--obs blksize] [--line-length length] [minipro_options] -r filename.ext
  miniprohex [--offset offset] [minipro_options] -w filename.ext

This calls minipro after converting known file types to
.bin for writing or converting bin files after reading.

--offset: Offset for file conversion (see srec_cat)
--unfill: Unfil blocks of at least size of byte (see srec_cat)
--obs: Output block size (see srec_cat)
--line-length: Output line length max (see srec_cat)

Assumes minipro and srec_cat are on the path.

Here's the minipro help:
EOF
exec minipro
fi

# Options for minipro
OPTS=
# The -r or -w
RWOPT=
# Real file name
FN=
# Extension provided
EXT=
# Options for srec_cat
SRECOPTS=

# parse arguments and sort them out
while [ $# != 0 ]
do
# note --obs x becomes --obs=x
  if [ "$1" == "--obs" ]
  then
      SRECOPTS="$SRECOPTS $1=$2"
      shift
      shift
      continue
  fi
# note --line-length x becomes --line-length=x
  if [ "$1" == "--line-length" ]
  then
      SRECOPTS="$SRECOPTS $1=$2"
  fi
  if [ "$1" == "--unfill" ]
  then
      SRECOPTS="$SRECOPTS $1 $2 $3"
      shift
      shift
      shift
      continue
  fi
  if [ "$1" == "--offset" ]
  then
      SRECOPTS="$SRECOPTS $1 $2"
      shift
      shift
      continue
  fi
  if [ "$1" == "-r" ]
  then
    RWOPT=-r
    shift
    FN=$1
  elif [ "$1" == "-w" ]
  then
    RWOPT=-w
    shift
    FN=$1
  elif [ "$1" == "-p" ]
  then
    if [ -z "$DEVICE" ]
    then
      shift
      DEVICE="-p '$1'"
      shift
      continue
    else
      echo "Ignoring duplicate -p flag!"
      shift
      shift
      continue
    fi
  else
    OPTS="$OPTS $1"
  fi
  shift
done
# Pick apart file name
filename=$(basename "$FN")
extension="${filename##*.}"
fileprefix="${filename%.*}"

# for each case decide the real file name (RFILE)
# and what you have to do before or after
# to get the right answer
case "$extension" in
.bin)
# no conversion needed
RFILE="$FN"
PRECVT=
POSTCVT=
;;
hex)
RFILE="$(mktemp)"
PRECVT="srec_cat $FN --intel $SRECOPTS -o $RFILE --binary"
POSTCVT="srec_cat $RFILE --binary $SRECOPTS -o $FN --intel"
;;
srec | s19)
RFILE="$(mktemp)"
PRECVT="srec_cat $FN --motorola $SRECOPTS -o $RFILE --binary"
POSTCVT="srec_cat $RFILE --binary $SRECOPTS -o $FN --motorola"
;;
txt)
# assume fuse and just go for it
RFILE="$FN"
PRECVT=
POSTCVT=
;;
*)
# Who knows?
RFILE="$FN"
PRECVT=
POSTCVT=
esac

DOIT="minipro $OPTS $DEVICE $RWOPT $RFILE"

# If we write, do PRECMD and execute
if [ $RWOPT == -w ]
then
$PRECVT
eval $DOIT
else
# If reading, execute and then do post cmd
eval $DOIT
$POSTCVT
fi

# Purge the temporary file if we used one
[ "$PRECVT" ] && rm "$RFILE"