# Linear congruential pseudorandom number generator
#
# Copyright (C) 2014  Patrick "P. J." McDermott
#
# 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, either version 3 of the License, or
# (at your option) any later version.
#
# 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/>.

rand_x=1

srand()
{
	local x="${1}"
	shift 1

	rand_x=${x}

	return 0
}

rand()
{
	# Increment, multiplier, and modulus values are those used in glibc.
	rand_x=$((1103515245 * $rand_x + 12345))
	rand_x=$(($rand_x % 4294967296))

	return 0
}