#!/bin/sh

if [ $# -eq 0 ] || [ "$1" = "-h" ]; then
    cat<<EOF
Usage: ${0##*/} FILES|FOLDERS

Prettify C source code using 'indent'.

Alternative to indent: astyle, uncrustify.

EOF
    exit
fi

if ! command -v indent >/dev/null 2>&1; then
    echo >&2 "'indent' not found in PATH. Exiting."
    exit 1
fi

CMD="indent -i4 -ppi4 -bli0 -cli4 -nut"
_formatc_dir()
{
    ## Note that '+' does not work together with {} concatenation. Don't know
    ## why...
    find "$1" -type f \
	    -name "*.[ch]" \
        -print \
        -exec $CMD {} \; \
        -exec rm {}"~" \;
}

for i ; do
    [ ! -e "$i" ] && continue

    if [ -d "$i" ]; then
        _formatc_dir "$i"
    else
        $CMD "$i"
        rm -f "$i~"
    fi
done