From c4e072e8a58800f2dfd6c1e5e95009dd783061be Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Tue, 6 Feb 2007 00:10:32 +0000
Subject: Merged r4354:4390 from developer branch jcorgan/digital into trunk.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4391 221aa14e-8319-0410-a670-987f0aec2ac5
---
gnuradio-examples/python/digital/run_length.py | 83 ++++++++++++++++++++++++++
1 file changed, 83 insertions(+)
create mode 100755 gnuradio-examples/python/digital/run_length.py
(limited to 'gnuradio-examples/python/digital/run_length.py')
diff --git a/gnuradio-examples/python/digital/run_length.py b/gnuradio-examples/python/digital/run_length.py
new file mode 100755
index 0000000000..dcf86e8c59
--- /dev/null
+++ b/gnuradio-examples/python/digital/run_length.py
@@ -0,0 +1,83 @@
+#!/usr/bin/env python
+#
+# Copyright 2007 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio 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 2, or (at your option)
+# any later version.
+#
+# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from optparse import OptionParser
+import sys
+
+def main():
+ parser = OptionParser()
+ parser.add_option("-f", "--file", default=None,
+ help="Choose file to read data from.")
+ (options, args) = parser.parse_args()
+
+ if options.file == None:
+ print "Must specify file to read from using '-f'."
+ sys.exit(1)
+ print "Using", options.file, "for data."
+
+ f = open(options.file, 'r')
+ runs = []
+ count = 0
+ current = 0
+ bytes = 0
+ bits = 0
+
+ for ch in f.read():
+ x = ord(ch)
+ bytes = bytes + 1
+ for i in range(7,-1,-1):
+ bits = bits + 1
+ t = (x >> i) & 0x1
+ if t == current:
+ count = count + 1
+ else:
+ if count > 0:
+ if len(runs) < count:
+ for j in range(count - len(runs)):
+ runs.append(0);
+ runs[count-1] = runs[count-1] + 1
+
+ current = 1-current;
+ count = 1
+
+ # Deal with last run at EOF
+ if len(runs) < count and count > 0:
+ for j in range(count - len(runs)):
+ runs.append(0);
+ runs[count-1] = runs[count-1] + 1
+
+ chk = 0
+ print "Bytes read: ", bytes
+ print "Bits read: ", bits
+ print
+ for i in range(len(runs)):
+ chk = chk + runs[i]*(i+1)
+ print "Runs of length", i+1, ":", runs[i]
+ print
+ print "Sum of runs:", chk, "bits"
+ print
+ print "Maximum run length is", len(runs), "bits"
+
+if __name__ == "__main__":
+ main()
+
+
--
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