1 files changed, 97 insertions, 0 deletions

diff --git a/gnunet/strings.py b/gnunet/strings.py
new file mode 100644
index 0000000..cfbdaa5
--- /dev/null
+++ b/gnunet/strings.py
@@ -0,0 +1,97 @@
+import datetime
+
+from gnunet import *
+
+encTable = "0123456789ABCDEFGHIJKLMNOPQRSTUV"
+
+def data_to_string(data):
+  data = bytearray(data)
+  size = len(data)
+  bits = 0
+  rpos = 0
+  vbit = 0
+  ret = ""
+  while rpos < size:
+    while rpos < size and vbit < 5:
+      bits = (bits << 8) | data[rpos]
+      rpos += 1
+      vbit += 8
+    while vbit >= 5:
+      vbit -= 5
+      ret += encTable[(bits >> vbit) & 31]
+  if vbit > 0:
+    ret += encTable[(bits << (5 - vbit)) & 31]
+  return ret
+
+def string_to_data(s):
+  s = str(s)
+  size = len(s)
+  bits = 0
+  rpos = 0
+  vbit = 0
+  ret = bytearray([])
+  try:
+    while rpos < size:
+      while rpos < size and vbit < 8:
+        bits = (bits << 5) | int(s[rpos], 32)
+        rpos += 1
+        vbit += 5
+      while vbit >= 8:
+        vbit -= 8
+        ret.append((bits >> vbit) & 255)
+    if vbit > 0:
+      if bits & ((1 << vbit) - 1) != 0:
+        raise ValueError("")
+  except ValueError:
+    raise ValueError("'" + s + "' is not a valid data-encoding string")
+  return ret
+  
+def absolute_time_to_string(t):
+  return t.strftime("%a %b %d %H:%M:%S %Y")
+
+def string_to_absolute_time(s):
+  if s == "end of time":
+    return None
+  try:
+    return datetime.datetime.strptime(s, "%a %b %d %H:%M:%S %Y")
+  except ValueError:
+    pass
+  try:
+    return datetime.datetime.strptime(s, "%c")
+  except ValueError:
+    pass
+  try:
+    return datetime.datetime.strptime(s, "%Ec")
+  except ValueError:
+    pass
+  try:
+    return datetime.datetime.strptime(s, "%Y-%m-%d %H:%M:%S")
+  except ValueError:
+    pass
+  try:
+    return datetime.datetime.strptime(s, "%Y-%m-%d %H:%M")
+  except ValueError:
+    pass
+  try:
+    return datetime.datetime.strptime(s, "%x")
+  except ValueError:
+    pass
+  try:
+    return datetime.datetime.strptime(s, "%Ex")
+  except ValueError:
+    pass
+  try:
+    return datetime.datetime.strptime(s, "%Y-%m-%d")
+  except ValueError:
+    pass
+  try:
+    return datetime.datetime.strptime(s, "%Y-%m")
+  except ValueError:
+    pass
+  try:
+    return datetime.datetime.strptime(s, "%Y")
+  except ValueError:
+    pass
+  raise ValueError("%s is not a properly formatted time string" % s)
+
+