[Zope3-checkins] CVS: ZODB3/ZConfig - datatypes.py:1.1.2.23

[Barry Warsaw]

Update of /cvs-repository/ZODB3/ZConfig
In directory cvs.zope.org:/tmp/cvs-serv26668

Modified Files:
      Tag: zconfig-schema-devel-branch
	datatypes.py 
Log Message:
SuffixMultiplier: A generic class to support specifications like 12h,
53MB.  Used in the new byte-size type and time-interval types.


=== ZODB3/ZConfig/datatypes.py 1.1.2.22 => 1.1.2.23 ===
--- ZODB3/ZConfig/datatypes.py:1.1.2.22	Fri Jan  3 01:04:25 2003
+++ ZODB3/ZConfig/datatypes.py	Fri Jan  3 13:54:47 2003
@@ -276,6 +276,29 @@
         l.append('')
     return l
 
+
+class SuffixMultiplier:
+    # d is a dictionary of suffixes to integer multipliers.  If no suffixes
+    # match, default is the multiplier.  Matches are case insensitive.  Return
+    # values are in the fundamental unit.
+    def __init__(self, d, default=1):
+        self._d = d
+        self._default = default
+        # all keys must be the same size
+        self._keysz = None
+        for k in d.keys():
+            if self._keysz is None:
+                self._keysz = len(k)
+            else:
+                assert self._keysz == len(k)
+
+    def __call__(self, v):
+        v = v.lower()
+        for s, m in self._d.items():
+            if v[-self._keysz:] == s:
+                return int(v[:-self._keysz]) * m
+        return int(v) * self._default
+
 stock_datatypes = {
     "boolean":       asBoolean,
     "identifier":    IdentifierConversion().__call__,
@@ -291,11 +314,20 @@
     "socket-address":socket_address,
     "ipaddr-or-hostname":IpaddrOrHostname().__call__,
     "existing-directory":existing_directory,
-    "existing-path":existing_path,
-    "existing-file":existing_file,
-    "existing-dirpath":existing_dirpath,
-    "constructor":constructor_conversion,
-    "key-value":space_sep_key_value_conversion,
+    "existing-path":     existing_path,
+    "existing-file":     existing_file,
+    "existing-dirpath":  existing_dirpath,
+    "constructor":       constructor_conversion,
+    "key-value":         space_sep_key_value_conversion,
+    "byte-size":         SuffixMultiplier({'kb': 1024,
+                                           'mb': 1024*1024,
+                                           'gb': 1024*1024*1024,
+                                           }).__call__,
+    "time-interval":     SuffixMultiplier({'s': 1,
+                                           'm': 60,
+                                           'h': 60*60,
+                                           'd': 60*60*24,
+                                           }).__call__,
     }
 
 class Registry: