1 files changed, 29 insertions, 0 deletions
diff --git a/lib/dtas/parse_freq.rb b/lib/dtas/parse_freq.rb
new file mode 100644
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+++ b/lib/dtas/parse_freq.rb
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+# Copyright (C) 2015 all contributors <dtas-all@nongnu.org>
+# License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
+
+require_relative '../dtas'
+module DTAS::ParseFreq
+
+  # may return a negative frequency meaning lowpass
+  def parse_freq(val, round = true)
+    case val
+    when String
+      val = val.dup
+      mult = val.sub!(/k\z/, '') ? 1000 : 1
+      val = (val.to_f * mult)
+    when Numeric
+      val
+    else
+      raise ArgumentError, "non-numeric value given"
+    end
+
+    case round
+    when true, :int
+      val.round
+    when :float
+      val.to_f
+    else
+      raise ArgumentError, "usage: parse_freq(val, (true|:round))"
+    end
+  end
+end