Project

General

Profile

Actions

Task #1932

closed

Permit zero-length NameComponent

Added by Junxiao Shi about 10 years ago. Updated over 9 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Start date:
Due date:
% Done:

100%

Estimated time:
2.00 h

Description

Permit zero-length NameComponent.

A zero-length NameComponent doesn't have special meaning in terms of packet processing and forwarding.
The processing rule is exactly same as any other NameComponent.


Files


Related issues 2 (0 open2 closed)

Related to NDN Specifications - Bug #1763: Canonical Order section permits empty NameComponentClosedJunxiao Shi07/15/2014

Actions
Blocks ndn-cxx - Task #1933: Permit zero-length NameComponentClosedJunxiao Shi

Actions
Actions #1

Updated by Junxiao Shi about 10 years ago

  • Related to Bug #1763: Canonical Order section permits empty NameComponent added
Actions #2

Updated by Junxiao Shi about 10 years ago

  • Blocks Task #1933: Permit zero-length NameComponent added
Actions #3

Updated by Junxiao Shi about 10 years ago

  • Status changed from New to In Progress
Actions #4

Updated by Junxiao Shi about 10 years ago

  • Status changed from In Progress to Code review
  • % Done changed from 0 to 100
Actions #5

Updated by Junxiao Shi about 10 years ago

  • Status changed from Code review to Closed
Actions #7

Updated by Yingdi Yu over 9 years ago

Why not use "NULL" as a special name component to indicate a particular name component is not available?

Actions #8

Updated by Junxiao Shi over 9 years ago

Reply to note-7:

The string "NULL", or more precisely, the binary octets 4E554C4C, is a regular NameComponent, and it differs from null.

Similarly, in C++, the char[] literal "NULL" does not equal nullptr.

Defining 4E554C4C to have a special meaning of null has two drawbacks:

  • It limits what value a regular NameComponent can take. For example, nonNegativeInterger 1314212940 and string "NULL" are not representable.
  • Its place in canonical ordering is unusual. It's surprising to see "A" < null but "hello" > null.
Actions #9

Updated by Alex Afanasyev over 9 years ago

I'm a litle bit lost now. Didn't we already allowed empty component to exist? What else needs to be done?

Actions

Also available in: Atom PDF