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#!/bin/sh -e
#
#    mem_available: grab the current memory and usage
#
#    Copyright (C) 2008 Canonical Ltd.
#    Copyright (C) 2011 Dustin Kirkland
#
#    Authors: Dustin Kirkland <kirkland@ubuntu.com>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, version 3 of the License.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

__memory() {
	free
}

__memory() {
	local free="" total="" buffers="" cached=""
	local kb_main_used=0 buffers_plus_cached=0 fo_buffers=0 fo_cached=0
	while read tok val unit; do
		case "$tok" in
			MemTotal:) total=${val};;
			MemFree:) free=${val};;
			Buffers:) buffers=${val};;
			Cached:) cached=${val};;
		esac
		[ -n "${free}" -a -n "${total}" -a -n "${buffers}" -a -n "${cached}" ] && break;
	done < /proc/meminfo
        kb_main_used=$(($total-$free))
        buffers_plus_cached=$(($buffers+$cached))
        # "free output" buffers and cache (output from 'free')
        fo_buffers=$(($kb_main_used - $buffers_plus_cached))
        fo_cached=$(($kb_main_free + $buffers_plus_cached))
        fpdiv $((100*${fo_buffers})) "${total}" 0;
        f=${_RET}
	if [ $total -ge 1048576 ]; then
		fpdiv "$total" 1048567 1
		total=${_RET}
		unit="$ICON_GB"
	elif [ $total -ge 1024 ]; then
		fpdiv "$total" 1024 0
		total=${_RET}
		unit="$ICON_MB"
	else
		unit="$ICON_KB"
	fi
	[ -n "$total" ] || return
	color b g W; printf "%s" "$total"; color -; color g W; printf "%s" "$unit"; color -; color b g W; printf "%s" "$f"; color -; color g W; printf "%s" "$PCT"; color --
}

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