#!/bin/sh
#
# Tool for fetching the X-Files from CMT
#
# Copyright (C) 2009 Nokia Corporation. All Rights Reserved.
#
# Author: Andras Domokos<andras.domokos@nokia.com>
#

if [ "$1" = "-h" ]; then
    echo "usage: xfetch [-h] [-a] [idx]"
    echo "       idx is X-File index, no value means read the last one"
    echo "       -a means read all the files"
    exit 1
fi

if [ -z $(which pnsend) ]; then
    echo -e "\npnsend not found, install isa-utils package!\n"
    exit 1
fi

MAXDATA=1024

if [ $MAXDATA -lt 64 ]; then
    echo "Internal error: MAXDATA smaller than the usable minimum of 64"
    exit 1
fi

if [ $MAXDATA -gt 1024 ]; then
    echo "Internal error: MAXDATA bigger than the usable maximum of 1024"
    exit 1
fi

PMM_GID=$(printf "%04x" 239)
PMM_GID=$(echo $PMM_GID | sed -e 's/\(..\)\(..\)/\1 \2/')

QSIZE=$(printf "%02x" 0x0c)
RSIZE=$(printf "%02x" 0x0d)

QREAD=$(printf "%02x" 4)
RREAD=$(printf "%02x" 5)

FNAME=$(printf "%02x" 13)
OK=00

MAXIDX=0
while true; do 
    local x
    x=$((MAXIDX+1))
    x=$(printf "%04x" $x)
    x=$(echo $x | sed -e 's/\(..\)\(..\)/\1 \2/')
    size=$(pnsend -r 0x23 00 $QSIZE $PMM_GID $x 00 00 | grep "rcv: 00 $RSIZE $OK" | sed -e 's/rcv: .\{30\}\(..\) \(..\)/0x\1\2/')
    if [ -z "$size" ]; then
        break;
    fi
    MAXIDX=$((MAXIDX+1))
    XLIST="$XLIST $MAXIDX"
done

if [ $MAXIDX -eq 0 ]; then
    echo "X-Files not available"
    exit 1
fi

if [ -z "$1" ]; then
    lpos=$(pnsend -r 0x23 00 $QREAD $PMM_GID 00 00 00 00 00 00 00 00 00 00 00 02 | grep "rcv: 00 $RREAD $OK" | sed -e 's/rcv: .\{48\}\(..\) \(..\)\(.*\)/0x\2\1/')
    if [ -z "$lpos" ]; then
        echo "Unexpected response received, exiting..."
        exit 1
    fi
    lpos=$((lpos))
    XLIST=$lpos
elif [ "$1" != "-a" ]; then
    idx=$(($1))
    if [ $idx -lt 1 -o $idx -gt $MAXIDX ]; then
        echo "Invalid index, valid values are 1..$MAXIDX"
        exit 1
    fi
    XLIST=$idx
fi

for idx in $XLIST; do 
    echo "Fetching X-File $idx ..."
    IDX=$(printf "%04x" $idx)
    IDX=$(echo $IDX | sed -e 's/\(..\)\(..\)/\1 \2/')
    
    #echo "IDX = $IDX"
    
    size=$(pnsend -r 0x23 00 $QSIZE $PMM_GID $IDX 00 00 | grep "rcv: 00 $RSIZE $OK" | sed -e 's/rcv: .\{30\}\(..\) \(..\)/0x\1\2/')
    
    if [ -z "$size" ]; then
        echo "Unexpected response received, exiting..."
        exit 1
    fi
    
    size=$((size))
    #echo "size = $size"
    
    offs=0
    i=0
    
    echo -n -e "\rFetched $offs bytes"
    
    while [ $size -gt 0 ]; do
        chunk=$size
        if [ $size -gt $MAXDATA ]; then
           chunk=$MAXDATA
        fi
    
        OFFSET=$(printf "%08x" $offs | sed -e 's/^\(..\)\(..\)\(..\)\(..\)/\1 \2 \3 \4/')
        AMOUNT=$(printf "%08x" $chunk | sed -e 's/^\(..\)\(..\)\(..\)\(..\)/\1 \2 \3 \4/')
        data=$(pnsend -r 0x23 00 $QREAD $PMM_GID $IDX 00 00 $OFFSET $AMOUNT | grep "rcv: 00 $RREAD $OK" | sed -e 's/rcv: .\{48\}//')
    
        if [ -z "$data" ]; then
            echo -e "\nUnexpected response received, exiting..."
            exit 1
        fi
    
        dlen=$((3*chunk-1))
        data=$(echo $data | sed -e "s/^\(.\{$dlen\}\)\(.*\)/\1/")
    
        i=$((i+1))
    
        if [ $i -eq 1 ]; then
            id=$(echo $data | sed -e 's/^\(..\)\(.*\)/\1/')
            if [ "$id" != "$FNAME" ]; then
                echo -e "\nX-File name is not present"
                exit 1
            fi
    
            nlen=$(echo $data | sed -e 's/^\(..\) \(..\) \(..\) \(.*\)/0x\2\3/') 
            nlen=$((3*nlen-1))
            file=$(echo $data | sed -e "s/^\(.\{9\}\)\(.\{$nlen\}\)\(.*\)/\2/")
            file=$(eval $(echo $file | sed -e 's/ /\\x/g;s/^/echo -n -e \"\\x/;s/$/\"/')) 
            if echo $file | grep -q ath; then
                file=${file}_0.XF
            fi
            > $file 
            data=$(echo $data | sed -e "s/^\(.\{9\}\)\(.\{$nlen\}\)\(.*\)/\3/")
        fi
    
        if [ -n "$data" ]; then
            eval $(echo $data | sed -e  's/ /\\x/g;s/^/echo -n -e \"\\x/;s/$/\"/') >> $file 
        fi
    
        size=$((size-chunk))
        offs=$((offs+chunk))
    
        echo -n -e "\rFetched $offs bytes"
    done
    
    echo -e "\nX-File created: $file ($((offs-nlen/3-3)) bytes)"
done