bool FileFormat::openStreams(const QString fileName,
OstProto::StreamConfigList &streams, QString &error)
{
QFile file(fileName);
QByteArray buf;
int size, contentOffset, contentSize;
quint32 calcCksum;
OstProto::FileMagic magic;
OstProto::FileMeta meta;
OstProto::FileContent content;
OstProto::FileChecksum cksum, zeroCksum;
if (!file.open(QIODevice::ReadOnly))
goto _open_fail;
if (file.size() < kFileMagicSize)
goto _magic_missing;
if (file.size() < kFileMinSize)
goto _checksum_missing;
buf.resize(file.size());
size = file.read(buf.data(), buf.size());
if (size < 0)
goto _read_fail;
Q_ASSERT(file.atEnd());
file.close();
qDebug("%s: file.size() = %lld", __FUNCTION__, file.size());
qDebug("%s: size = %d", __FUNCTION__, size);
//qDebug("Read %d bytes", buf.size());
//qDebug("%s", QString(buf.toHex()).toAscii().constData());
// Parse and verify magic
if (!magic.ParseFromArray(
(void*)(buf.constData() + kFileMagicOffset),
kFileMagicSize))
{
goto _magic_parse_fail;
}
if (magic.value() != kFileMagicValue)
goto _magic_match_fail;
// Parse and verify checksum
if (!cksum.ParseFromArray(
(void*)(buf.constData() + size - kFileChecksumSize),
kFileChecksumSize))
{
goto _cksum_parse_fail;
}
zeroCksum.set_value(0);
if (!zeroCksum.SerializeToArray(
(void*) (buf.data() + size - kFileChecksumSize),
kFileChecksumSize))
{
goto _zero_cksum_serialize_fail;
}
calcCksum = checksumCrc32C((quint8*) buf.constData(), size);
qDebug("checksum \nExpected:%x Actual:%x",
calcCksum, cksum.value());
if (cksum.value() != calcCksum)
goto _cksum_verify_fail;
// Parse the metadata first before we parse the full contents
if (!meta.ParseFromArray(
(void*)(buf.constData() + kFileMetaDataOffset),
size - kFileMetaDataOffset))
{
goto _metadata_parse_fail;
}
qDebug("%s: File MetaData (INFORMATION) - \n%s", __FUNCTION__,
QString().fromStdString(meta.DebugString()).toAscii().constData());
// MetaData Validation(s)
if (meta.data().file_type() != OstProto::kStreamsFileType)
goto _unexpected_file_type;
if (meta.data().format_version_major() != kFileFormatVersionMajor)
goto _incompatible_file_version;
if (meta.data().format_version_minor() > kFileFormatVersionMinor)
goto _incompatible_file_version;
if (meta.data().format_version_minor() < kFileFormatVersionMinor)
{
// TODO: need to modify 'buf' such that we can parse successfully
// assuming the native minor version
}
if (meta.data().format_version_revision() > kFileFormatVersionRevision)
{
error = QString(tr("%1 was created using a newer version of Ostinato."
" New features/protocols will not be available.")).arg(fileName);
}
Q_ASSERT(meta.data().format_version_major() == kFileFormatVersionMajor);
// ByteSize() does not include the Tag/Key, so we add 2 for that
contentOffset = kFileMetaDataOffset + meta.data().ByteSize() + 2;
contentSize = size - contentOffset - kFileChecksumSize;
// Parse full contents
if (!content.ParseFromArray(
(void*)(buf.constData() + contentOffset),
contentSize))
{
goto _content_parse_fail;
}
if (!content.matter().has_streams())
goto _missing_streams;
postParseFixup(meta.data(), content);
streams.CopyFrom(content.matter().streams());
return true;
_missing_streams:
error = QString(tr("%1 does not contain any streams")).arg(fileName);
goto _fail;
_content_parse_fail:
error = QString(tr("Failed parsing %1 contents")).arg(fileName);
qDebug("Error: %s", QString().fromStdString(
content.matter().InitializationErrorString())
.toAscii().constData());
qDebug("Debug: %s", QString().fromStdString(
content.matter().DebugString()).toAscii().constData());
goto _fail;
_incompatible_file_version:
error = QString(tr("%1 is in an incompatible format version - %2.%3.%4"
" (Native version is %5.%6.%7)"))
.arg(fileName)
.arg(meta.data().format_version_major())
.arg(meta.data().format_version_minor())
.arg(meta.data().format_version_revision())
.arg(kFileFormatVersionMajor)
.arg(kFileFormatVersionMinor)
.arg(kFileFormatVersionRevision);
goto _fail;
_unexpected_file_type:
error = QString(tr("%1 is not a streams file")).arg(fileName);
goto _fail;
_metadata_parse_fail:
error = QString(tr("Failed parsing %1 meta data")).arg(fileName);
qDebug("Error: %s", QString().fromStdString(
meta.data().InitializationErrorString())
.toAscii().constData());
goto _fail;
_cksum_verify_fail:
error = QString(tr("%1 checksum validation failed!\nExpected:%2 Actual:%3"))
.arg(fileName)
.arg(calcCksum, 0, kBaseHex)
.arg(cksum.value(), 0, kBaseHex);
goto _fail;
_zero_cksum_serialize_fail:
error = QString(tr("Internal Error: Zero Checksum Serialize failed!\n"
"Error: %1\nDebug: %2"))
.arg(QString().fromStdString(
cksum.InitializationErrorString()))
.arg(QString().fromStdString(cksum.DebugString()));
goto _fail;
_cksum_parse_fail:
error = QString(tr("Failed parsing %1 checksum")).arg(fileName);
qDebug("Error: %s", QString().fromStdString(
cksum.InitializationErrorString())
.toAscii().constData());
goto _fail;
_magic_match_fail:
error = QString(tr("%1 is not an Ostinato file")).arg(fileName);
goto _fail;
_magic_parse_fail:
error = QString(tr("%1 does not look like an Ostinato file")).arg(fileName);
qDebug("Error: %s", QString().fromStdString(
magic.InitializationErrorString())
.toAscii().constData());
goto _fail;
_read_fail:
error = QString(tr("Error reading from %1")).arg(fileName);
goto _fail;
_checksum_missing:
error = QString(tr("%1 is too small (missing checksum)")).arg(fileName);
goto _fail;
_magic_missing:
error = QString(tr("%1 is too small (missing magic value)"))
.arg(fileName);
goto _fail;
_open_fail:
error = QString(tr("Error opening %1")).arg(fileName);
goto _fail;
_fail:
qDebug("%s", error.toAscii().constData());
return false;
}
