#! /usr/bin/env bash

set -e
set -u
set -x

if ! test -f README.md
then
    echo "run from the base directory." >&2
    exit 1
fi

in=$1

if ! test -f $in
then
    echo "$in does not exist" >&2
    exit 1
fi

chosenfile=""
foundname="n"
for n in $(seq 10000)
do
    paddedn=$(printf "%05d" "$n")
    chosenfile="./tests/single-exec/$paddedn.c"

    if test -f "$chosenfile" 
    then
        continue
    fi

    foundname="y"
    break
done

if test "$foundname" = "n"
then
    echo "no numbers left."  >&2
    exit 1
fi


cat $in > "$chosenfile"
added="y"
tagfile="$chosenfile.tags"

echo "inferring tags..." 1>&2

echo "portable" > $tagfile

# Check for cstd
if gcc -pedantic --std=c89 -c -o /tmp/ctestsuite-infer.o $in
then
    echo "c89" >> $tagfile
elif gcc -pedantic --std=c99 -c -o /tmp/ctestsuite-infer.o $in
then
    echo "c99" >> $tagfile
elif gcc -pedantic --std=c11 -c -o /tmp/ctestsuite-infer.o $in
then
    echo "c11" >> $tagfile
else
    echo "unable to guess c std"
fi 

if grep -q -e "#include" "$in"
then
    # Since these are single file tests, the only
    # thing we could include would be libc headers. 
    echo "needs-libc" >> $tagfile
fi

if grep -q -e "#include" -e "#define" -e "#if" -e "#ifdef" "$in"
then
    echo "needs-cpp" >> $tagfile
fi

echo "$chosenfile"