Add -n option to suppress non-zero fields

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

diff --git a/bitfield b/bitfield
index e9be554734bb9ba37613cf9a4b3ca5ffafe41387..b0dfcc0a341ce0982c0ab8962ae701eaf4acf7dc 100644 (file)
--- a/bitfield
+++ b/bitfield
@@ -79,12 +79,14 @@ class register:
        def add_field(self, field,):
                self.fields.append(field)
 
        def add_field(self, field,):
                self.fields.append(field)
 

-       def decode(self, value):
+       def decode(self, value, ignore_zero):

                field_width = (self.width + 3) / 4
                name_width = max(map(lambda f: len(f.name), self.fields))
                str = "0x%0*lx [%d]\n" % (field_width, value, value)
                for field in self.fields:
                        v = field.mask(self.width, value);
                field_width = (self.width + 3) / 4
                name_width = max(map(lambda f: len(f.name), self.fields))
                str = "0x%0*lx [%d]\n" % (field_width, value, value)
                for field in self.fields:
                        v = field.mask(self.width, value);

+                       if ignore_zero and v == 0:
+                               continue

                        desc = field.value(v)
                        if desc is not None:
                                str += "%*s: 0x%s [%s]\n" \
                        desc = field.value(v)
                        if desc is not None:
                                str += "%*s: 0x%s [%s]\n" \


@@ -210,8 +212,8 @@ def usage(prog):
 
 def main():
        try:
 
 def main():
        try:

-               (opts, args) = getopt(sys.argv[1:], "hls:", \
-                       ["help", "list", "search="])
+               (opts, args) = getopt(sys.argv[1:], "hlns:", \
+                       ["help", "list", "non-zero", "search="])

        except GetoptError:
                usage(sys.argv[0])
                return 1
        except GetoptError:
                usage(sys.argv[0])
                return 1


@@ -227,6 +229,9 @@ def main():
                print "No configuration available"
                return 1
 
                print "No configuration available"
                return 1
 

+       options = {}
+       options['non-zero'] = False
+

        for o, a in opts:
                if o in ("-h", "--help"):
                        usage(sys.argv[0])
        for o, a in opts:
                if o in ("-h", "--help"):
                        usage(sys.argv[0])


@@ -240,6 +245,8 @@ def main():
                        list_regs(search_regs(regs, a))
                        return
 
                        list_regs(search_regs(regs, a))
                        return
 

+               if o in ("-n", "--non-zero"):
+                       options['non-zero'] = True

 
        if not args:
                usage(sys.argv[0])
 
        if not args:
                usage(sys.argv[0])


@@ -263,7 +270,7 @@ def main():
 
        for value in values:
                i = long(value.strip(), 0)
 
        for value in values:
                i = long(value.strip(), 0)

-               print r.decode(i)
+               print r.decode(i, options['non-zero'])

 
        return 0
 
 
        return 0