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Diffstat (limited to 'src/proto/protoio.cc')
-rw-r--r-- | src/proto/protoio.cc | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/proto/protoio.cc b/src/proto/protoio.cc new file mode 100644 index 000000000..852ba56fa --- /dev/null +++ b/src/proto/protoio.cc @@ -0,0 +1,93 @@ +/* + * Copyright (c) 2012 ARM Limited + * All rights reserved + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Andreas Hansson + */ + +#include "base/misc.hh" +#include "proto/protoio.hh" + +using namespace std; +using namespace google::protobuf; + +ProtoOutputStream::ProtoOutputStream(const string& filename) : + fileStream(filename.c_str(), ios::out | ios::binary | ios::trunc), + zeroCopyStream(NULL), gzipStream(NULL), codedStream(NULL) +{ + if (!fileStream.good()) + panic("Could not open %s for writing\n", filename); + + // Wrap the output file in a zero copy stream, that in turn is + // wrapped in a gzip stream if the filename ends with .gz. The + // latter stream is in turn wrapped in a coded stream + zeroCopyStream = new io::OstreamOutputStream(&fileStream); + if (filename.find_last_of('.') != string::npos && + filename.substr(filename.find_last_of('.') + 1) == "gz") { + gzipStream = new io::GzipOutputStream(zeroCopyStream); + codedStream = new io::CodedOutputStream(gzipStream); + } else { + codedStream = new io::CodedOutputStream(zeroCopyStream); + } + + // Use the ASCII characters gem5 as our magic number and write it + // to the file + const uint32_t magic_number = 0x356d6567; + codedStream->WriteLittleEndian32(magic_number); + + // Note that each type of stream (packet, instruction etc) should + // add its own header and perform the appropriate checks +} + +ProtoOutputStream::~ProtoOutputStream() +{ + delete codedStream; + // As the compression is optional, see if the stream exists + if (gzipStream != NULL) + delete gzipStream; + delete zeroCopyStream; + fileStream.close(); +} + +void +ProtoOutputStream::write(const Message& msg) +{ + // Write the size of the message to the stream + codedStream->WriteVarint32(msg.ByteSize()); + + // Write the message itself to the stream + if (!msg.SerializeToCodedStream(codedStream)) + panic("Unable to write message to coded stream\n"); +} |