7 files changed, 128 insertions, 141 deletions

diff --git a/src/corelib/io/qdatastream.cpp b/src/corelib/io/qdatastream.cpp
index 19e86a6..b10d603 100644
--- a/src/corelib/io/qdatastream.cpp
+++ b/src/corelib/io/qdatastream.cpp
@@ -42,7 +42,7 @@
 #include "qdatastream.h"
 #include "qdatastream_p.h"
 
-#ifndef QT_NO_DATASTREAM
+#if !defined(QT_NO_DATASTREAM) || defined(QT_BOOTSTRAPPED)
 #include "qbuffer.h"
 #include "qstring.h"
 #include <stdio.h>
diff --git a/src/corelib/io/qdatastream.h b/src/corelib/io/qdatastream.h
index f61a59c..2e4e7c1 100644
--- a/src/corelib/io/qdatastream.h
+++ b/src/corelib/io/qdatastream.h
@@ -66,7 +66,7 @@ template <typename T> class QSet;
 template <class Key, class T> class QHash;
 template <class Key, class T> class QMap;
 
-#ifndef QT_NO_DATASTREAM
+#if !defined(QT_NO_DATASTREAM) || defined(QT_BOOTSTRAPPED)
 class QDataStreamPrivate;
 class Q_CORE_EXPORT QDataStream
 {
diff --git a/src/corelib/io/qdatastream_p.h b/src/corelib/io/qdatastream_p.h
index 157fee9..98dd21f 100644
--- a/src/corelib/io/qdatastream_p.h
+++ b/src/corelib/io/qdatastream_p.h
@@ -57,7 +57,7 @@
 
 QT_BEGIN_NAMESPACE
 
-#ifndef QT_NO_DATASTREAM
+#if !defined(QT_NO_DATASTREAM) || defined(QT_BOOTSTRAPPED)
 class QDataStreamPrivate
 {
 public:
diff --git a/src/corelib/io/qfile.cpp b/src/corelib/io/qfile.cpp
index c9b2603..d4077bc 100644
--- a/src/corelib/io/qfile.cpp
+++ b/src/corelib/io/qfile.cpp
@@ -1339,7 +1339,7 @@ QFile::setPermissions(const QString &fileName, Permissions permissions)
 
 static inline qint64 _qfile_writeData(QAbstractFileEngine *engine, QRingBuffer *buffer)
 {
-    qint64 ret = engine->write(buffer->readPointer(), buffer->size());
+    qint64 ret = engine->write(buffer->readPointer(), buffer->nextDataBlockSize());
     if (ret > 0)
         buffer->free(ret);
     return ret;
diff --git a/src/corelib/io/qfsfileengine.cpp b/src/corelib/io/qfsfileengine.cpp
index 9ab831f..3cf9b7e 100644
--- a/src/corelib/io/qfsfileengine.cpp
+++ b/src/corelib/io/qfsfileengine.cpp
@@ -762,12 +762,10 @@ qint64 QFSFileEnginePrivate::writeFdFh(const char *data, qint64 len)
         // Buffered stdlib mode.
 
         size_t result;
-        bool eof;
         do {
             result = fwrite(data + writtenBytes, 1, size_t(len - writtenBytes), fh);
             writtenBytes += result;
-            eof = feof(fh);
-        } while (!eof && (result == 0 ? errno == EINTR : writtenBytes < len));
+        } while (result == 0 ? errno == EINTR : writtenBytes < len);
 
     } else if (fd != -1) {
         // Unbuffered stdio mode.
@@ -783,7 +781,7 @@ qint64 QFSFileEnginePrivate::writeFdFh(const char *data, qint64 len)
                 || (result > 0 && (writtenBytes += result) < len));
     }
 
-    if (writtenBytes == 0) {
+    if (len &&  writtenBytes == 0) {
         writtenBytes = -1;
         q->setError(errno == ENOSPC ? QFile::ResourceError : QFile::WriteError, qt_error_string(errno));
     }
diff --git a/src/corelib/io/qiodevice.cpp b/src/corelib/io/qiodevice.cpp
index 4494d2a..e4e6a15 100644
--- a/src/corelib/io/qiodevice.cpp
+++ b/src/corelib/io/qiodevice.cpp
@@ -619,7 +619,8 @@ qint64 QIODevice::size() const
 */
 bool QIODevice::seek(qint64 pos)
 {
-    if (d_func()->openMode == NotOpen) {
+    Q_D(QIODevice);
+    if (d->openMode == NotOpen) {
         qWarning("QIODevice::seek: The device is not open");
         return false;
     }
@@ -628,7 +629,6 @@ bool QIODevice::seek(qint64 pos)
         return false;
     }
 
-    Q_D(QIODevice);
 #if defined QIODEVICE_DEBUG
     printf("%p QIODevice::seek(%d), before: d->pos = %d, d->buffer.size() = %d\n",
            this, int(pos), int(d->pos), d->buffer.size());
@@ -640,21 +640,16 @@ bool QIODevice::seek(qint64 pos)
         d->devicePos = pos;
     }
 
-    if (offset > 0 && !d->buffer.isEmpty()) {
-        // When seeking forwards, we need to pop bytes off the front of the
-        // buffer.
-        do {
-            int bytesToSkip = int(qMin<qint64>(offset, INT_MAX));
-            d->buffer.skip(bytesToSkip);
-            offset -= bytesToSkip;
-        } while (offset > 0);
-    } else if (offset < 0) {
+    if (offset < 0
+            || offset >= qint64(d->buffer.size()))
         // When seeking backwards, an operation that is only allowed for
         // random-access devices, the buffer is cleared. The next read
         // operation will then refill the buffer. We can optimize this, if we
         // find that seeking backwards becomes a significant performance hit.
         d->buffer.clear();
-    }
+    else if (!d->buffer.isEmpty())
+        d->buffer.skip(int(offset));
+
 #if defined QIODEVICE_DEBUG
     printf("%p \tafter: d->pos == %d, d->buffer.size() == %d\n", this, int(d->pos),
            d->buffer.size());
@@ -762,22 +757,20 @@ qint64 QIODevice::read(char *data, qint64 maxSize)
 
     // Short circuit for getChar()
     if (maxSize == 1) {
-        int chint = d->buffer.getChar();
-        if (chint != -1) {
+        int chint;
+        while ((chint = d->buffer.getChar()) != -1) {
+            if (!sequential)
+                ++d->pos;
+
             char c = char(uchar(chint));
-            if (c == '\r' && (d->openMode & Text)) {
-                d->buffer.ungetChar(c);
-            } else {
-                if (data)
-                    *data = c;
-                if (!sequential)
-                    ++d->pos;
+            if (c == '\r' && (d->openMode & Text))
+                continue;
+            *data = c;
 #if defined QIODEVICE_DEBUG
-                printf("%p \tread 0x%hhx (%c) returning 1 (shortcut)\n", this,
-                       int(c), isprint(c) ? c : '?');
+            printf("%p \tread 0x%hhx (%c) returning 1 (shortcut)\n", this,
+                   int(c), isprint(c) ? c : '?');
 #endif
-                return qint64(1);
-            }
+            return qint64(1);
         }
     }
 
@@ -911,10 +904,10 @@ qint64 QIODevice::read(char *data, qint64 maxSize)
 QByteArray QIODevice::read(qint64 maxSize)
 {
     Q_D(QIODevice);
-    CHECK_MAXLEN(read, QByteArray());
-    QByteArray tmp;
-    qint64 readSoFar = 0;
-    char buffer[4096];
+    QByteArray result;
+
+    CHECK_MAXLEN(read, result);
+
 #if defined QIODEVICE_DEBUG
     printf("%p QIODevice::read(%d), d->pos = %d, d->buffer.size() = %d\n",
            this, int(maxSize), int(d->pos), int(d->buffer.size()));
@@ -922,16 +915,34 @@ QByteArray QIODevice::read(qint64 maxSize)
     Q_UNUSED(d);
 #endif
 
-    do {
-        qint64 bytesToRead = qMin(int(maxSize - readSoFar), int(sizeof(buffer)));
-        qint64 readBytes = read(buffer, bytesToRead);
-        if (readBytes <= 0)
-            break;
-        tmp.append(buffer, (int) readBytes);
-        readSoFar += readBytes;
-    } while (readSoFar < maxSize && bytesAvailable() > 0);
+    if (maxSize != qint64(int(maxSize))) {
+        qWarning("QIODevice::read: maxSize argument exceeds QByteArray size limit");
+        maxSize = INT_MAX;
+    }
+
+    qint64 readBytes = 0;
+    if (maxSize) {
+        result.resize(int(maxSize));
+        if (!result.size()) {
+            // If resize fails, read incrementally.
+            qint64 readResult;
+            do {
+                result.resize(int(qMin(maxSize, result.size() + QIODEVICE_BUFFERSIZE)));
+                readResult = read(result.data() + readBytes, result.size() - readBytes);
+                if (readResult > 0 || readBytes == 0)
+                    readBytes += readResult;
+            } while (readResult == QIODEVICE_BUFFERSIZE);
+        } else {
+            readBytes = read(result.data(), result.size());
+        }
+    }
+
+    if (readBytes <= 0)
+        result.clear();
+    else
+        result.resize(int(readBytes));
 
-    return tmp;
+    return result;
 }
 
 /*!
@@ -952,28 +963,30 @@ QByteArray QIODevice::readAll()
            this, int(d->pos), int(d->buffer.size()));
 #endif
 
-    QByteArray tmp;
-    if (d->isSequential() || size() == 0) {
-        // Read it in chunks. Use bytesAvailable() as an unreliable hint for
-        // sequential devices, but try to read 4K as a minimum.
-        int chunkSize = qMax(qint64(4096), bytesAvailable());
-        qint64 totalRead = 0;
-        forever {
-            tmp.resize(tmp.size() + chunkSize);
-            qint64 readBytes = read(tmp.data() + totalRead, chunkSize);
-            tmp.chop(chunkSize - (readBytes < 0 ? 0 : readBytes));
-            if (readBytes <= 0)
-                return tmp;
-            totalRead += readBytes;
-            chunkSize = qMax(qint64(4096), bytesAvailable());
-        }
+    QByteArray result;
+    qint64 readBytes = 0;
+    if (d->isSequential() || (readBytes = size()) == 0) {
+        // Size is unknown, read incrementally.
+        qint64 readResult;
+        do {
+            result.resize(result.size() + QIODEVICE_BUFFERSIZE);
+            readResult = read(result.data() + readBytes, result.size() - readBytes);
+            if (readResult > 0 || readBytes == 0)
+                readBytes += readResult;
+        } while (readResult > 0);
     } else {
         // Read it all in one go.
-        tmp.resize(int(bytesAvailable()));
-        qint64 readBytes = read(tmp.data(), tmp.size());
-        tmp.resize(readBytes < 0 ? 0 : int(readBytes));
+        // If resize fails, don't read anything.
+        result.resize(int(readBytes - d->pos));
+        readBytes = read(result.data(), result.size());
     }
-    return tmp;
+
+    if (readBytes <= 0)
+        result.clear();
+    else
+        result.resize(int(readBytes));
+
+    return result;
 }
 
 /*!
@@ -1122,11 +1135,9 @@ qint64 QIODevice::readLine(char *data, qint64 maxSize)
 QByteArray QIODevice::readLine(qint64 maxSize)
 {
     Q_D(QIODevice);
-    CHECK_MAXLEN(readLine, QByteArray());
-    QByteArray tmp;
-    const int BufferGrowth = 4096;
-    qint64 readSoFar = 0;
-    qint64 readBytes = 0;
+    QByteArray result;
+
+    CHECK_MAXLEN(readLine, result);
 
 #if defined QIODEVICE_DEBUG
     printf("%p QIODevice::readLine(%d), d->pos = %d, d->buffer.size() = %d\n",
@@ -1135,25 +1146,34 @@ QByteArray QIODevice::readLine(qint64 maxSize)
     Q_UNUSED(d);
 #endif
 
-    do {
-        if (maxSize != 0)
-            tmp.resize(int(readSoFar + qMin(int(maxSize), BufferGrowth)));
-        else
-            tmp.resize(int(readSoFar + BufferGrowth));
-        readBytes = readLine(tmp.data() + readSoFar, tmp.size() - readSoFar);
-        if (readBytes <= 0)
-            break;
-
-        readSoFar += readBytes;
-    } while ((!maxSize || readSoFar < maxSize) &&
-             readSoFar + 1 == tmp.size() &&   // +1 due to the ending null
-             tmp.at(readSoFar - 1) != '\n');
+    if (maxSize > INT_MAX) {
+        qWarning("QIODevice::read: maxSize argument exceeds QByteArray size limit");
+        maxSize = INT_MAX;
+    }
 
-    if (readSoFar == 0 && readBytes == -1)
-        tmp.clear();            // return Null if we found an error
+    result.resize(int(maxSize));
+    qint64 readBytes = 0;
+    if (!result.size()) {
+        // If resize fails or maxSize == 0, read incrementally
+        if (maxSize == 0)
+            maxSize = INT_MAX;
+        qint64 readResult;
+        do {
+            result.resize(int(qMin(maxSize, result.size() + QIODEVICE_BUFFERSIZE)));
+            readResult = readLine(result.data() + readBytes, result.size() - readBytes);
+            if (readResult > 0 || readBytes == 0)
+                readBytes += readResult;
+        } while (readResult == QIODEVICE_BUFFERSIZE
+                && result[int(readBytes)] != '\n');
+    } else
+        readBytes = readLine(result.data(), result.size());
+
+    if (readBytes <= 0)
+        result.clear();
     else
-        tmp.resize(int(readSoFar));
-    return tmp;
+        result.resize(readBytes);
+
+    return result;
 }
 
 /*!
@@ -1384,40 +1404,8 @@ bool QIODevicePrivate::putCharHelper(char c)
 */
 bool QIODevice::getChar(char *c)
 {
-    Q_D(QIODevice);
-    const OpenMode openMode = d->openMode;
-    if (!(openMode & ReadOnly)) {
-        if (openMode == NotOpen)
-            qWarning("QIODevice::getChar: Closed device");
-        else
-            qWarning("QIODevice::getChar: WriteOnly device");
-        return false;
-    }
-
-    // Shortcut for QIODevice::read(c, 1)
-    QRingBuffer *buffer = &d->buffer;
-    const int chint = buffer->getChar();
-    if (chint != -1) {
-        char ch = char(uchar(chint));
-        if ((openMode & Text) && ch == '\r') {
-            buffer->ungetChar(ch);
-        } else {
-            if (c)
-                *c = ch;
-            if (!d->isSequential())
-                ++d->pos;
-            return true;
-        }
-    }
-
-    // Fall back to read().
     char ch;
-    if (read(&ch, 1) == 1) {
-        if (c)
-            *c = ch;
-        return true;
-    }
-    return false;
+    return (1 == read(c ? c : &ch, 1));
 }
 
 /*!
diff --git a/src/corelib/io/qurl.cpp b/src/corelib/io/qurl.cpp
index 86680a5..fd51bcf 100644
--- a/src/corelib/io/qurl.cpp
+++ b/src/corelib/io/qurl.cpp
@@ -6210,8 +6210,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     \list
     \o qt.nokia.com becomes http://qt.nokia.com
     \o ftp.qt.nokia.com becomes ftp://ftp.qt.nokia.com
-    \o localhost becomes http://localhost
-    \o /home/user/test.html becomes file:///home/user/test.html (if exists)
+    \o hostname becomes http://hostname
+    \o /home/user/test.html becomes file:///home/user/test.html
     \endlist
 
     \section2 Tips to avoid erroneous character conversion when dealing with
@@ -6228,31 +6228,32 @@ QUrl QUrl::fromUserInput(const QString &userInput)
 {
     QString trimmedString = userInput.trimmed();
 
-    // Check the most common case of a valid url with scheme and host first
+    // Check first for files, since on Windows drive letters can be interpretted as schemes
+    if (QDir::isAbsolutePath(trimmedString))
+        return QUrl::fromLocalFile(trimmedString);
+
     QUrl url = QUrl::fromEncoded(trimmedString.toUtf8(), QUrl::TolerantMode);
-    if (url.isValid() && !url.scheme().isEmpty() && !url.host().isEmpty())
+    QUrl urlPrepended = QUrl::fromEncoded((QLatin1String("http://") + trimmedString).toUtf8(), QUrl::TolerantMode);
+
+    // Check the most common case of a valid url with scheme and host
+    // We check if the port would be valid by adding the scheme to handle the case host:port
+    // where the host would be interpretted as the scheme
+    if (url.isValid()
+        && !url.scheme().isEmpty()
+        && (!url.host().isEmpty() || !url.path().isEmpty())
+        && urlPrepended.port() == -1)
         return url;
 
-    // Absolute files that exists
-    if (QDir::isAbsolutePath(trimmedString) && QFile::exists(trimmedString))
-        return QUrl::fromLocalFile(trimmedString);
-
-    // If the string is missing the scheme or the scheme is not valid prepend a scheme
-    QString scheme = url.scheme();
-    if (scheme.isEmpty() || scheme.contains(QLatin1Char('.')) || scheme == QLatin1String("localhost")) {
-        // Do not do anything for strings such as "foo", only "foo.com"
+    // Else, try the prepended one and adjust the scheme from the host name
+    if (urlPrepended.isValid() && (!urlPrepended.host().isEmpty() || !urlPrepended.path().isEmpty()))
+    {
         int dotIndex = trimmedString.indexOf(QLatin1Char('.'));
-        if (dotIndex != -1 || trimmedString.startsWith(QLatin1String("localhost"))) {
-            const QString hostscheme = trimmedString.left(dotIndex).toLower();
-            QByteArray scheme = (hostscheme == QLatin1String("ftp")) ? "ftp" : "http";
-            trimmedString = QLatin1String(scheme) + QLatin1String("://") + trimmedString;
-        }
-        url = QUrl::fromEncoded(trimmedString.toUtf8(), QUrl::TolerantMode);
+        const QString hostscheme = trimmedString.left(dotIndex).toLower();
+        if (hostscheme == QLatin1String("ftp"))
+            urlPrepended.setScheme(QLatin1String("ftp"));
+        return urlPrepended;
     }
 
-    if (url.isValid())
-        return url;
-
     return QUrl();
 }
 // end of BSD code