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authorP. J. McDermott <pj@pehjota.net>2014-08-27 22:03:05 (EDT)
committer P. J. McDermott <pj@pehjota.net>2014-08-27 22:03:05 (EDT)
commitbf734679a7643e4cf54e192cb8a624c92fc2da64 (patch)
tree93b5d9990e43992166d9ac150ae66173299ae7b3
parent6da6b199c38fd9295be7ac110f6d63991c721165 (diff)
lib/rand.sh: New file
-rw-r--r--lib/local.mk1
-rw-r--r--lib/rand.sh48
-rw-r--r--locale/en_US.sh3
3 files changed, 52 insertions, 0 deletions
diff --git a/lib/local.mk b/lib/local.mk
index 5dad2b9..30306d3 100644
--- a/lib/local.mk
+++ b/lib/local.mk
@@ -8,5 +8,6 @@ pkgdata_sources = \
lib/pkg.sh \
lib/chroot.sh \
lib/opkg.sh \
+ lib/rand.sh \
lib/cmd.sh \
lib/profile.sh
diff --git a/lib/rand.sh b/lib/rand.sh
new file mode 100644
index 0000000..19d6e9f
--- /dev/null
+++ b/lib/rand.sh
@@ -0,0 +1,48 @@
+# Linear congruential pseudorandom number generator
+#
+# Copyright (C) 2014 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/>.
+
+[ "x${_RAND_SM+set}" = 'xset' ] && return 0
+_RAND_SM=1
+
+use output
+use locale
+
+rand_x=1
+
+srand()
+{
+ local x="${1}"
+
+ case "${x}" in
+ [!0-9])
+ warn "$(get_msg 'rand_bad_x')"
+ return 1
+ ;;
+ esac
+
+ rand_x=${x}
+}
+
+rand()
+{
+ # Increment, multiplier, and modulus values are those used in glibc.
+ rand_x=$((1103515245 * $rand_x + 12345))
+ rand_x=$(($rand_x % 4294967296))
+}
diff --git a/locale/en_US.sh b/locale/en_US.sh
index 46fdba2..ba3d5b7 100644
--- a/locale/en_US.sh
+++ b/locale/en_US.sh
@@ -39,6 +39,9 @@ msg_prokit_control_found_contination='found continuation line where expected '\
msg_prokit_list_item_separator=', '
msg_prokit_control_missing_fields='missing fields: %s'
+# lib/rand.sh
+msg_prokit_rand_bad_x='Invalid random number generator seed value'
+
# lib/cmd.sh
msg_prokit_cmd_not_found='Command "%s" not found'
msg_prokit_cmd_usage='Usage: %s %s %s'