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-rw-r--r--README.markdown6
-rw-r--r--lib/puppet/parser/functions/convert_base.rb35
-rw-r--r--spec/functions/convert_base_spec.rb24
3 files changed, 65 insertions, 0 deletions
diff --git a/README.markdown b/README.markdown
index 591c27b..ccbceab 100644
--- a/README.markdown
+++ b/README.markdown
@@ -155,6 +155,12 @@ Appends the contents of multiple arrays onto the first array given. For example:
* `concat(['1','2','3'],'4',['5','6','7'])` returns ['1','2','3','4','5','6','7'].
*Type*: rvalue.
+#### `convert_base`
+
+Converts a given integer or base 10 string representing an integer to a specified base, as a string. For example:
+ * `convert_base(5, 2)` results in: '101'
+ * `convert_base('254', '16')` results in: 'fe'
+
#### `count`
If called with only an array, it counts the number of elements that are **not** nil/undef. If called with a second argument, counts the number of elements in an array that matches the second argument. *Type*: rvalue.
diff --git a/lib/puppet/parser/functions/convert_base.rb b/lib/puppet/parser/functions/convert_base.rb
new file mode 100644
index 0000000..0fcbafe
--- /dev/null
+++ b/lib/puppet/parser/functions/convert_base.rb
@@ -0,0 +1,35 @@
+module Puppet::Parser::Functions
+
+ newfunction(:convert_base, :type => :rvalue, :arity => 2, :doc => <<-'ENDHEREDOC') do |args|
+
+ Converts a given integer or base 10 string representing an integer to a specified base, as a string.
+
+ Usage:
+
+ $binary_repr = convert_base(5, 2) # $binary_repr is now set to "101"
+ $hex_repr = convert_base("254", "16") # $hex_repr is now set to "fe"
+
+ ENDHEREDOC
+
+ raise Puppet::ParseError, ("convert_base(): First argument must be either a string or an integer") unless (args[0].is_a?(Integer) or args[0].is_a?(String))
+ raise Puppet::ParseError, ("convert_base(): Second argument must be either a string or an integer") unless (args[1].is_a?(Integer) or args[1].is_a?(String))
+
+ if args[0].is_a?(String)
+ raise Puppet::ParseError, ("convert_base(): First argument must be an integer or a string corresponding to an integer in base 10") unless args[0] =~ /^[0-9]+$/
+ end
+
+ if args[1].is_a?(String)
+ raise Puppet::ParseError, ("convert_base(): First argument must be an integer or a string corresponding to an integer in base 10") unless args[1] =~ /^[0-9]+$/
+ end
+
+ number_to_convert = args[0]
+ new_base = args[1]
+
+ number_to_convert = number_to_convert.to_i()
+ new_base = new_base.to_i()
+
+ raise Puppet::ParseError, ("convert_base(): base must be at least 2 and must not be greater than 36") unless new_base >= 2 and new_base <= 36
+
+ return number_to_convert.to_s(new_base)
+ end
+end
diff --git a/spec/functions/convert_base_spec.rb b/spec/functions/convert_base_spec.rb
new file mode 100644
index 0000000..8ab2284
--- /dev/null
+++ b/spec/functions/convert_base_spec.rb
@@ -0,0 +1,24 @@
+require 'spec_helper'
+
+describe 'convert_base' do
+ it { is_expected.not_to eq(nil) }
+ it { is_expected.to run.with_params().and_raise_error(ArgumentError) }
+ it { is_expected.to run.with_params("asdf").and_raise_error(ArgumentError) }
+ it { is_expected.to run.with_params("asdf","moo","cow").and_raise_error(ArgumentError) }
+ it { is_expected.to run.with_params(["1"],"2").and_raise_error(Puppet::ParseError, /argument must be either a string or an integer/) }
+ it { is_expected.to run.with_params("1",["2"]).and_raise_error(Puppet::ParseError, /argument must be either a string or an integer/) }
+ it { is_expected.to run.with_params("1",1).and_raise_error(Puppet::ParseError, /base must be at least 2 and must not be greater than 36/) }
+ it { is_expected.to run.with_params("1",37).and_raise_error(Puppet::ParseError, /base must be at least 2 and must not be greater than 36/) }
+
+ it "should raise a ParseError if argument 1 is a string that does not correspond to an integer in base 10" do
+ is_expected.to run.with_params("ten",6).and_raise_error(Puppet::ParseError, /argument must be an integer or a string corresponding to an integer in base 10/)
+ end
+
+ it "should raise a ParseError if argument 2 is a string and does not correspond to an integer in base 10" do
+ is_expected.to run.with_params(100,"hex").and_raise_error(Puppet::ParseError, /argument must be an integer or a string corresponding to an integer in base 10/)
+ end
+
+ it { is_expected.to run.with_params("11",'16').and_return('b') }
+ it { is_expected.to run.with_params("35",'36').and_return('z') }
+ it { is_expected.to run.with_params(5, 2).and_return('101') }
+end