indicate that the regexes are read only

Signed-off-by: Benedek Kupper <[email protected]>

Author: benedekkupper

Dfu/Device.cs

@@ -565,7 +565,7 @@ private Status SeErase(uint address)
             return status;
         }
 
-        private static Regex SeMemoryLayoutRegex = new Regex(
+        private static readonly Regex SeMemoryLayoutRegex = new Regex(
                 @"^@(?<name>[\w\s]*[\w]+)\s*
                  /0x(?<address>[A-F0-9]{1,8})
                  /(\d+)\*(\d+)([\x20KM]{1})([a-g]{1})(?:,(\d+)\*(\d+)([\x20KM]{1})([a-g]{1}))*$",

FileFormat/IntelHex.cs

@@ -122,7 +122,7 @@ private enum RecordType : byte
 
         private static readonly int CountCharOffset = 11;
 
-        private static Regex RecordRegex = new Regex
+        private static readonly Regex RecordRegex = new Regex
             (@"^:(?<bytecount>[A-F0-9]{2})(?<address>[A-F0-9]{4})(?<recordtype>0[0-5]{1})(?<data>(?:[A-F0-9]{2})*)(?<checksum>[A-F0-9]{2})$",
             RegexOptions.Compiled | RegexOptions.IgnorePatternWhitespace);
     }

FileFormat/SRecord.cs

@@ -96,7 +96,7 @@ private enum RecordType : byte
 
         private static readonly int CountCharOffset = 4;
 
-        private static Regex RecordRegex = new Regex
+        private static readonly Regex RecordRegex = new Regex
             (@"^S(?:(?:(?<recordtype>[0,1,5,9]{1})(?<bytecount>[A-F0-9]{2})(?<address>(?:[A-F0-9]{2}){2})) |
                     (?:(?<recordtype>[2,6,8]{1})(?<bytecount>[A-F0-9]{2})(?<address>(?:[A-F0-9]{2}){3})) |
                     (?:(?<recordtype>[3,7]{1})(?<bytecount>[A-F0-9]{2})(?<address>(?:[A-F0-9]{2}){4})))(?<data>(?:[A-F0-9]{2})*)(?<checksum>[A-F0-9]{2})$",