1 files changed, 74 insertions, 0 deletions
diff --git a/lib/python/debian_linux/kconfig.py b/lib/python/debian_linux/kconfig.py
new file mode 100644
index 0000000..c5192d1
--- /dev/null
+++ b/lib/python/debian_linux/kconfig.py
@@ -0,0 +1,74 @@
+from __future__ import absolute_import
+
+from .utils import SortedDict
+
+__all__ = (
+    "KconfigFile",
+)
+
+class EntryString(object):
+    __slots__ = "name", "value"
+
+    def __init__(self, name, value):
+        self.name = name
+        self.value = value
+
+    def __str__(self):
+        return "CONFIG_%s=%s" % (self.name, self.value)
+
+class EntryTristate(object):
+    __slots__ = "name", "value"
+
+    VALUE_NO = 0
+    VALUE_YES = 1
+    VALUE_MOD = 2
+
+    def __init__(self, name, value = None):
+        self.name = name
+        if value == 'n' or value is None:
+            self.value = self.VALUE_NO
+        elif value == 'y':
+            self.value = self.VALUE_YES
+        elif value == 'm':
+            self.value = self.VALUE_MOD
+
+    def __str__(self):
+        conf = "CONFIG_%s" % self.name
+        if self.value == self.VALUE_NO:
+            return "# %s is not set" % conf
+        elif self.value == self.VALUE_YES:
+            return "%s=y" % conf
+        elif self.value == self.VALUE_MOD:
+            return "%s=m" % conf
+
+class KconfigFile(SortedDict):
+    def __str__(self):
+        ret = []
+        for i in self.str_iter():
+            ret.append(i)
+        return '\n'.join(ret) + '\n'
+
+    def read(self, f):
+        for line in iter(f.readlines()):
+            line = line.strip()
+            if line.startswith("CONFIG_"):
+                i = line.find('=')
+                option = line[7:i]
+                value = line[i+1:]
+                if value in ('y', 'm'):
+                    entry = EntryTristate(option, value)
+                else:
+                    entry = EntryString(option, value)
+                self[option] = entry
+            elif line.startswith("# CONFIG_"):
+                option = line[9:-11]
+                self[option] = EntryTristate(option)
+            elif line.startswith("#") or not line:
+                pass
+            else:
+                raise RuntimeError, "Can't recognize %s" % line
+
+    def str_iter(self):
+        for key, value in self.iteritems():
+            yield str(value)
+