Add rpm and dcm type.

Author: dosas

README.rst

@@ -105,6 +105,8 @@ Audio
 Archive
 ^^^^^^^
 
+-  **rpm** - ``application/x-rpm``
+-  **dcm** - ``application/dicom``
 -  **epub** - ``application/epub+zip``
 -  **zip** - ``application/zip``
 -  **tar** - ``application/x-tar``

filetype/types/__init__.py

@@ -58,6 +58,8 @@
 
 # Supported archive container types
 ARCHIVE = (
+    archive.Rpm(),
+    archive.Dcm(),
     archive.Epub(),
     archive.Zip(),
     archive.Tar(),

filetype/types/archive.py

@@ -513,3 +513,35 @@ def match(self, buf):
                 buf[1] == 0x5A and
                 buf[2] == 0x49 and
                 buf[3] == 0x50)
+
+
+class Dcm(Type):
+    """Implements the Dcm image type matcher."""
+
+    MIME = 'application/dicom'
+    EXTENSION = 'dcm'
+
+    def __init__(self):
+        super(Dcm, self).__init__(
+            mime=Dcm.MIME,
+            extension=Dcm.EXTENSION
+        )
+
+    def match(self, buf):
+        return buf[128:131] == bytearray([0x44, 0x49, 0x43, 0x4d])
+
+
+class Rpm(Type):
+    """Implements the Rpm image type matcher."""
+
+    MIME = 'application/x-rpm'
+    EXTENSION = 'rpm'
+
+    def __init__(self):
+        super(Rpm, self).__init__(
+            mime=Rpm.MIME,
+            extension=Rpm.EXTENSION
+        )
+
+    def match(self, buf):
+        return buf[:4] == bytearray([0xed, 0xab, 0xee, 0xdb])