Implemented message file source and sink. Issue #101
diff --git a/grc/misc_utils/gsm_message_file_source.xml b/grc/misc_utils/gsm_message_file_source.xml
new file mode 100644
index 0000000..7095749
--- /dev/null
+++ b/grc/misc_utils/gsm_message_file_source.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0"?>
+<block>
+ <name>Message file source</name>
+ <key>gsm_message_file_source</key>
+ <import>import grgsm</import>
+ <make>grgsm.message_file_source($filename)</make>
+
+ <param>
+ <name>Source file</name>
+ <key>filename</key>
+ <value>/tmp/output.msg</value>
+ <type>file_open</type>
+ </param>
+
+ <source>
+ <name>out</name>
+ <type>message</type>
+ </source>
+
+ <doc>
+This block outputs gsm messages stored in a file.
+ </doc>
+</block>