diff options
Diffstat (limited to 'src/v2_decoder.cpp')
-rw-r--r-- | src/v2_decoder.cpp | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/src/v2_decoder.cpp b/src/v2_decoder.cpp deleted file mode 100644 index a4f36e9..0000000 --- a/src/v2_decoder.cpp +++ /dev/null @@ -1,142 +0,0 @@ -/* - Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file - - This file is part of 0MQ. - - 0MQ is free software; you can redistribute it and/or modify it under - the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - 0MQ is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ - -#include <stdlib.h> -#include <string.h> - -#include "platform.hpp" -#ifdef ZMQ_HAVE_WINDOWS -#include "windows.hpp" -#endif - -#include "v2_protocol.hpp" -#include "v2_decoder.hpp" -#include "likely.hpp" -#include "wire.hpp" -#include "err.hpp" - -zmq::v2_decoder_t::v2_decoder_t (size_t bufsize_, int64_t maxmsgsize_) : - decoder_base_t <v2_decoder_t> (bufsize_), - msg_flags (0), - maxmsgsize (maxmsgsize_) -{ - int rc = in_progress.init (); - errno_assert (rc == 0); - - // At the beginning, read one byte and go to flags_ready state. - next_step (tmpbuf, 1, &v2_decoder_t::flags_ready); -} - -zmq::v2_decoder_t::~v2_decoder_t () -{ - int rc = in_progress.close (); - errno_assert (rc == 0); -} - -int zmq::v2_decoder_t::flags_ready () -{ - msg_flags = 0; - if (tmpbuf [0] & v2_protocol_t::more_flag) - msg_flags |= msg_t::more; - if (tmpbuf [0] & v2_protocol_t::command_flag) - msg_flags |= msg_t::command; - - // The payload length is either one or eight bytes, - // depending on whether the 'large' bit is set. - if (tmpbuf [0] & v2_protocol_t::large_flag) - next_step (tmpbuf, 8, &v2_decoder_t::eight_byte_size_ready); - else - next_step (tmpbuf, 1, &v2_decoder_t::one_byte_size_ready); - - return 0; -} - -int zmq::v2_decoder_t::one_byte_size_ready () -{ - // Message size must not exceed the maximum allowed size. - if (maxmsgsize >= 0) - if (unlikely (tmpbuf [0] > static_cast <uint64_t> (maxmsgsize))) { - errno = EMSGSIZE; - return -1; - } - - // in_progress is initialised at this point so in theory we should - // close it before calling zmq_msg_init_size, however, it's a 0-byte - // message and thus we can treat it as uninitialised... - int rc = in_progress.init_size (tmpbuf [0]); - if (unlikely (rc)) { - errno_assert (errno == ENOMEM); - rc = in_progress.init (); - errno_assert (rc == 0); - errno = ENOMEM; - return -1; - } - - in_progress.set_flags (msg_flags); - next_step (in_progress.data (), in_progress.size (), - &v2_decoder_t::message_ready); - - return 0; -} - -int zmq::v2_decoder_t::eight_byte_size_ready () -{ - // The payload size is encoded as 64-bit unsigned integer. - // The most significant byte comes first. - const uint64_t msg_size = get_uint64 (tmpbuf); - - // Message size must not exceed the maximum allowed size. - if (maxmsgsize >= 0) - if (unlikely (msg_size > static_cast <uint64_t> (maxmsgsize))) { - errno = EMSGSIZE; - return -1; - } - - // Message size must fit into size_t data type. - if (unlikely (msg_size != static_cast <size_t> (msg_size))) { - errno = EMSGSIZE; - return -1; - } - - // in_progress is initialised at this point so in theory we should - // close it before calling init_size, however, it's a 0-byte - // message and thus we can treat it as uninitialised. - int rc = in_progress.init_size (static_cast <size_t> (msg_size)); - if (unlikely (rc)) { - errno_assert (errno == ENOMEM); - rc = in_progress.init (); - errno_assert (rc == 0); - errno = ENOMEM; - return -1; - } - - in_progress.set_flags (msg_flags); - next_step (in_progress.data (), in_progress.size (), - &v2_decoder_t::message_ready); - - return 0; -} - -int zmq::v2_decoder_t::message_ready () -{ - // Message is completely read. Signal this to the caller - // and prepare to decode next message. - next_step (tmpbuf, 1, &v2_decoder_t::flags_ready); - return 1; -} |