# Functions for printing messages
#
# Copyright (C) 2013  Patrick "P. J." McDermott
#
# This file is part of the ProteanOS Development Kit.
#
# The ProteanOS Development Kit 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, either version 3 of the
# License, or (at your option) any later version.
#
# The ProteanOS Development Kit 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 the ProteanOS Development Kit.  If not, see
# <http://www.gnu.org/licenses/>.

error()
{
	case "${1}" in
		*[!0-9]*)
			local fmt="${1}"
			shift 1

			printf '%s: Error: ' "${0##*/}" >&2
			printf "${fmt}\n" "${@}" >&2
			;;
		*)
			local status=${1}
			local fmt="${2}"
			shift 2
		
			printf '%s: Error: ' "${0##*/}" >&2
			printf "${fmt}\n" "${@}" >&2
		
			# In a subshell, this will have no effect, so the
			# shell's exit status will be 128+SIGINT.  Meh.
			exit_status=${status}
			kill -s INT ${$}
			;;
	esac
}

warn()
{
	local fmt="${1}"
	shift 1

	printf '%s: Warning: ' "${0##*/}" >&2
	printf "${fmt}\n" "${@}" >&2

	return 0
}

info()
{
	local fmt="${1}"
	shift 1

	printf '%s: ' "${0##*/}" >&2
	printf "${fmt}\n" "${@}" >&2

	return 0
}