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Commit 27b85117 authored by Andrius Štikonas's avatar Andrius Štikonas
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Rename blockSize to chunkSize to avoid confusion with physical blocks.

parent d9ceb502
Pipeline #140154 passed with stage
in 1 minute and 57 seconds
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src/util/externalcommandhelper.cpp
View file @ 27b85117
......@@ -156,19 +156,19 @@ bool ExternalCommandHelper::CreateFile(const QString &filePath, const QByteArray
}
// If targetDevice is empty then return QByteArray with data that was read from disk.
QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, const qint64 sourceOffset, const qint64 sourceLength, const QString& targetDevice, const qint64 targetOffset, const qint64 blockSize)
QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, const qint64 sourceOffset, const qint64 sourceLength, const QString& targetDevice, const qint64 targetOffset, const qint64 chunkSize)
{
if (!isCallerAuthorized()) {
return {};
}
// Avoid division by zero further down
if (!blockSize) {
if (!chunkSize) {
return {};
}
// Prevent some out of memory situations
if (blockSize > 100 * MiB) {
if (chunkSize > 100 * MiB) {
return {};
}
......@@ -187,13 +187,13 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
QVariantMap reply;
reply[QStringLiteral("success")] = true;
// This enum specified whether individual blocks are moved left or right
// This enum specified whether individual data chunks are moved left or right
// When source and target devices are the same we have to be careful not to overwrite
// source data with newly written data. We don't have to do this if sourceDevice is not
// targetDevice but there are no disadvantages in applying the same scheme.
// When partition is moved to the left, we start with the leftmost block,
// and move it further left, then second leftmost block and so on.
// But when we move partition to the right, we start with rightmost block.
// When partition is moved to the left, we start with the leftmost chunk,
// and move it further left, then second leftmost chunk and so on.
// But when we move partition to the right, we start with rightmost chunk.
// To account for this difference, we introduce CopyDirection variable which takes
// care of some of the differences in offset calculation between these two cases.
enum CopyDirection : qint8 {
......@@ -202,26 +202,26 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
};
qint8 copyDirection = targetOffset > sourceOffset ? CopyDirection::Right : CopyDirection::Left;
// Let readOffset (r) and writeOffset (w) be the offsets of the first block that we move.
// Let readOffset (r) and writeOffset (w) be the offsets of the first chunk that we move.
// When we move data to the left:
// ______target______ ______source______
// r <- w=================
qint64 readOffset = sourceOffset;
qint64 writeOffset = targetOffset;
// When we move data to the right, we start moving data from the last block
// When we move data to the right, we start moving data from the last chunk
// ______source______ ______target______
// =================r -> w
if (copyDirection == CopyDirection::Right) {
readOffset = sourceOffset + sourceLength - blockSize;
writeOffset = targetOffset + sourceLength - blockSize;
readOffset = sourceOffset + sourceLength - chunkSize;
writeOffset = targetOffset + sourceLength - chunkSize;
}
const qint64 blocksToCopy = sourceLength / blockSize;
const qint64 lastBlock = sourceLength % blockSize;
const qint64 chunksToCopy = sourceLength / chunkSize;
const qint64 lastBlock = sourceLength % chunkSize;
qint64 bytesWritten = 0;
qint64 blocksCopied = 0;
qint64 chunksCopied = 0;
QByteArray buffer;
int percent = 0;
......@@ -229,7 +229,7 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
timer.start();
QString reportText = xi18nc("@info:progress", "Copying %1 blocks (%2 bytes) from %3 to %4, direction: %5.", blocksToCopy,
QString reportText = xi18nc("@info:progress", "Copying %1 chunks (%2 bytes) from %3 to %4, direction: %5.", chunksToCopy,
sourceLength, readOffset, writeOffset, copyDirection == CopyDirection::Left ? i18nc("direction: left", "left")
: i18nc("direction: right", "right"));
Q_EMIT report(reportText);
......@@ -238,20 +238,20 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
QFile target(targetDevice);
QFile source(sourceDevice);
while (blocksCopied < blocksToCopy) {
if (!(rval = readData(source, buffer, readOffset + blockSize * blocksCopied * copyDirection, blockSize)))
while (chunksCopied < chunksToCopy) {
if (!(rval = readData(source, buffer, readOffset + chunkSize * chunksCopied * copyDirection, chunkSize)))
break;
if (!(rval = writeData(target, buffer, writeOffset + blockSize * blocksCopied * copyDirection)))
if (!(rval = writeData(target, buffer, writeOffset + chunkSize * chunksCopied * copyDirection)))
break;
bytesWritten += buffer.size();
if (++blocksCopied * 100 / blocksToCopy != percent) {
percent = blocksCopied * 100 / blocksToCopy;
if (++chunksCopied * 100 / chunksToCopy != percent) {
percent = chunksCopied * 100 / chunksToCopy;
if (percent % 5 == 0 && timer.elapsed() > 1000) {
const qint64 mibsPerSec = (blocksCopied * blockSize / 1024 / 1024) / (timer.elapsed() / 1000);
const qint64 mibsPerSec = (chunksCopied * chunkSize / 1024 / 1024) / (timer.elapsed() / 1000);
const qint64 estSecsLeft = (100 - percent) * timer.elapsed() / percent / 1000;
reportText = xi18nc("@info:progress", "Copying %1 MiB/second, estimated time left: %2", mibsPerSec, QTime(0, 0).addSecs(estSecsLeft).toString());
Q_EMIT report(reportText);
......@@ -262,11 +262,11 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
// copy the remainder
if (rval && lastBlock > 0) {
Q_ASSERT(lastBlock < blockSize);
Q_ASSERT(lastBlock < chunkSize);
const qint64 lastBlockReadOffset = copyDirection == CopyDirection::Left ? readOffset + blockSize * blocksCopied : sourceOffset;
const qint64 lastBlockWriteOffset = copyDirection == CopyDirection::Left ? writeOffset + blockSize * blocksCopied : targetOffset;
reportText = xi18nc("@info:progress", "Copying remainder of block size %1 from %2 to %3.", lastBlock, lastBlockReadOffset, lastBlockWriteOffset);
const qint64 lastBlockReadOffset = copyDirection == CopyDirection::Left ? readOffset + chunkSize * chunksCopied : sourceOffset;
const qint64 lastBlockWriteOffset = copyDirection == CopyDirection::Left ? writeOffset + chunkSize * chunksCopied : targetOffset;
reportText = xi18nc("@info:progress", "Copying remainder of chunk size %1 from %2 to %3.", lastBlock, lastBlockReadOffset, lastBlockWriteOffset);
Q_EMIT report(reportText);
rval = readData(source, buffer, lastBlockReadOffset, lastBlock);
......@@ -280,7 +280,7 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
}
}
reportText = xi18ncp("@info:progress argument 2 is a string such as 7 bytes (localized accordingly)", "Copying 1 block (%2) finished.", "Copying %1 blocks (%2) finished.", blocksCopied, i18np("1 byte", "%1 bytes", bytesWritten));
reportText = xi18ncp("@info:progress argument 2 is a string such as 7 bytes (localized accordingly)", "Copying 1 chunk (%2) finished.", "Copying %1 chunks (%2) finished.", chunksCopied, i18np("1 byte", "%1 bytes", bytesWritten));
Q_EMIT report(reportText);
reply[QStringLiteral("success")] = rval;
......
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