Multiple passes with AWK or perhaps alternatives

Zacariaz · 06-30-2015, 02:08 PM

I'm posting here as I don't know where else to put it.

I have a couple of AWK scripts looking like so:

date.awk

Code:

BEGIN {
    FS = ","
    datetime = strftime( "Ym%d", systime() );
}

{
    printf " %s %s %s %s %s %s %s %s %s %s\n",
        $( substr( datetime, 1, 1 ) + 1 ), \
        $( substr( datetime, 2, 1 ) + 1 ), \
        $( substr( datetime, 3, 1 ) + 1 ), \
        $( substr( datetime, 4, 1 ) + 1 ), \
        $11, \
        $( substr( datetime, 5, 1 ) + 1 ), \
        $( substr( datetime, 6, 1 ) + 1 ), \
        $11, \
        $( substr( datetime, 7, 1 ) + 1 ), \
        $( substr( datetime, 8, 1 ) + 1 )
}

END {
    printf "      .\n"
}

time.awk

Code:

BEGIN {
    FS = ","
    datetime = strftime( "%H%M%S", systime() );
}

{
    switch (NR) {
        case 1:
            printf "     / \\     "
            break
        case 2:
            printf "    /'. \\    "
            break
        case 3:
            printf "   / .-. \\   "
            break
        case 4:
            printf "  / (   )'\\  "
            break
        case 5:
            printf " /.'     '.\\ "
            break
    default:
        break
    }
    printf "%s %s %s %s %s %s %s %s\n",
        $( substr( datetime, 1, 1 ) + 1 ), \
        $( substr( datetime, 2, 1 ) + 1 ), \
        $12, \
        $( substr( datetime, 3, 1 ) + 1 ), \
        $( substr( datetime, 4, 1 ) + 1 ), \
        $12, \
        $( substr( datetime, 5, 1 ) + 1 ), \
        $( substr( datetime, 6, 1 ) + 1 )
}

END {
    printf "\n"
}

7sd.csv (data)

Code:

#####,    #,#####,#####,#   #,#####,#    ,#####,#####,#####,    #,     ,
#   #,    #,    #,    #,#   #,#    ,#    ,    #,#   #,#   #,   # ,  #  ,
#   #,    #,#####,#####,#####,#####,#####,    #,#####,#####,  #  ,     ,
#   #,    #,#    ,    #,    #,    #,#   #,    #,#   #,    #, #   ,  #  ,
#####,    #,#####,#####,    #,#####,#####,    #,#####,    #,#    ,     ,

When run in the right order, it will output date and time in large friendly letter, including a small fancy Arch Linux logo.

Everything works exactly as it should.

I'm always for optimizing, and since this is supposed to run once every second as is, and even on a somewhat slow platform, perhaps that's not a bad thing.

I would like to combine the two scripts, and I find it difficult to understand why you can't simple do multiple passes in one, without playing around with loops and such. Insights on this topic would be welcome.

I have also wondered if this sort of script can actually be compiled, but have yet to find satisfactory answers.

Lastly, I originally tried to implement this in pure bash, but frankly I hadn't a clue where to start, so alternative approaches would be welcome also.

In the end, what I've got actually works, so I'm not too concerned, but I like to learn new stuff, so please feel free to enlighten me if you so desire.

Best regards.