Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 1 | /* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */ |
| 2 | /* |
| 3 | * Copyright (c) 2011 University of California, Los Angeles |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation; |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | * |
| 18 | * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu> |
| 19 | */ |
| 20 | |
Alexander Afanasyev | 2b4c947 | 2012-08-09 15:00:38 -0700 | [diff] [blame] | 21 | #include "dtag.h" |
Alexander Afanasyev | e709f3d | 2011-08-21 17:55:45 -0700 | [diff] [blame] | 22 | |
Alexander Afanasyev | 2b4c947 | 2012-08-09 15:00:38 -0700 | [diff] [blame] | 23 | #include "base-attr.h" |
| 24 | #include "base-tag.h" |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 25 | |
Alexander Afanasyev | 1043c70 | 2013-07-15 16:21:09 -0700 | [diff] [blame] | 26 | NDN_NAMESPACE_BEGIN |
| 27 | |
| 28 | namespace wire { |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 29 | namespace CcnbParser { |
| 30 | |
| 31 | Dtag::Dtag (Buffer::Iterator &start, uint32_t dtag) |
| 32 | { |
| 33 | m_dtag = dtag; |
Alexander Afanasyev | e91ab75 | 2011-08-31 19:13:40 -0700 | [diff] [blame] | 34 | // std::cout << m_dtag << ", position: " << Block::counter << "\n"; |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 35 | /** |
| 36 | * Hack |
| 37 | * |
Alexander Afanasyev | 6315ef7 | 2012-06-01 20:56:31 -0700 | [diff] [blame] | 38 | * Stop processing after encountering "Content" dtag. Actual |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 39 | * content (including virtual payload) will be stored in Packet |
| 40 | * buffer |
| 41 | */ |
Alexander Afanasyev | e709f3d | 2011-08-21 17:55:45 -0700 | [diff] [blame] | 42 | if (dtag == CCN_DTAG_Content) |
Alexander Afanasyev | b4bf3ef | 2013-07-30 10:40:55 -0700 | [diff] [blame] | 43 | { |
| 44 | Block::ParseBlock (start, true); // process length field and ignore it |
| 45 | return; // hack #1. Do not process nesting block for <Content> |
| 46 | } |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 47 | |
| 48 | // parse attributes until first nested block reached |
Alexander Afanasyev | c1e33eb | 2012-05-31 12:13:17 -0700 | [diff] [blame] | 49 | while (!start.IsEnd () && BufferIteratorPeekU8 (start)!=CCN_CLOSE) |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 50 | { |
| 51 | Ptr<Block> block = Block::ParseBlock (start); |
| 52 | if (DynamicCast<BaseAttr> (block)!=0) |
| 53 | m_attrs.push_back (block); |
| 54 | else |
| 55 | { |
| 56 | m_nestedTags.push_back (block); |
| 57 | break; |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | // parse the rest of nested blocks |
Alexander Afanasyev | c1e33eb | 2012-05-31 12:13:17 -0700 | [diff] [blame] | 62 | while (!start.IsEnd () && BufferIteratorPeekU8 (start)!=CCN_CLOSE) |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 63 | { |
| 64 | // hack #2. Stop processing nested blocks if last block was <Content> |
Alexander Afanasyev | 772f51b | 2013-08-01 18:53:25 -0700 | [diff] [blame] | 65 | if (m_dtag == CCN_DTAG_Data && // we are in <Data> |
Alexander Afanasyev | e709f3d | 2011-08-21 17:55:45 -0700 | [diff] [blame] | 66 | DynamicCast<Dtag> (m_nestedTags.back())!=0 && // last block is DTAG |
| 67 | DynamicCast<Dtag> (m_nestedTags.back())->m_dtag == CCN_DTAG_Content) |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 68 | { |
| 69 | return; |
| 70 | } |
| 71 | |
Alexander Afanasyev | e709f3d | 2011-08-21 17:55:45 -0700 | [diff] [blame] | 72 | m_nestedTags.push_back (Block::ParseBlock (start)); |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 73 | } |
Alexander Afanasyev | e91ab75 | 2011-08-31 19:13:40 -0700 | [diff] [blame] | 74 | |
Alexander Afanasyev | 772f51b | 2013-08-01 18:53:25 -0700 | [diff] [blame] | 75 | // hack #3. Stop processing when last tag was <Data> |
| 76 | if (m_dtag == CCN_DTAG_Data && // we are in <Data> |
Alexander Afanasyev | e91ab75 | 2011-08-31 19:13:40 -0700 | [diff] [blame] | 77 | DynamicCast<Dtag> (m_nestedTags.back())!=0 && // last block is DTAG |
| 78 | DynamicCast<Dtag> (m_nestedTags.back())->m_dtag == CCN_DTAG_Content) |
| 79 | { |
| 80 | return; |
| 81 | } |
| 82 | |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 83 | if (start.IsEnd ()) |
Alexander Afanasyev | e709f3d | 2011-08-21 17:55:45 -0700 | [diff] [blame] | 84 | throw CcnbDecodingException (); |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 85 | |
| 86 | start.ReadU8 (); // read CCN_CLOSE |
Alexander Afanasyev | e91ab75 | 2011-08-31 19:13:40 -0700 | [diff] [blame] | 87 | // std::cout << "closer, position = " << Block::counter << "\n"; |
| 88 | // Block::counter ++; |
Alexander Afanasyev | 8b37905 | 2011-08-21 16:58:20 -0700 | [diff] [blame] | 89 | } |
| 90 | |
Alexander Afanasyev | 1043c70 | 2013-07-15 16:21:09 -0700 | [diff] [blame] | 91 | } // namespace CcnbParser |
| 92 | } // namespace wire |
| 93 | |
| 94 | NDN_NAMESPACE_END |