1 files changed, 150 insertions, 0 deletions
diff --git a/WebCore/platform/FileStream.cpp b/WebCore/platform/FileStream.cpp
new file mode 100644
index 0000000..45f435e
--- /dev/null
+++ b/WebCore/platform/FileStream.cpp
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2010 Google Inc.  All rights reserved.
+ *
+ * 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 Google Inc. 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.
+ */
+
+#include "config.h"
+
+#if ENABLE(BLOB) || ENABLE(FILE_WRITER)
+
+#include "FileStream.h"
+
+#include "PlatformString.h"
+
+namespace WebCore {
+
+FileStream::FileStream()
+    : m_handle(invalidPlatformFileHandle)
+    , m_bytesProcessed(0)
+    , m_totalBytesToRead(0)
+{
+}
+
+FileStream::~FileStream()
+{
+    ASSERT(!isHandleValid(m_handle));
+}
+
+// FIXME: To be removed when we switch to using BlobData.
+void FileStream::start()
+{
+}
+
+void FileStream::stop()
+{
+    close();
+}
+
+long long FileStream::getSize(const String& path, double expectedModificationTime)
+{
+    // Check the modification time for the possible file change.
+    time_t modificationTime;
+    if (!getFileModificationTime(path, modificationTime))
+        return -1;
+    if (expectedModificationTime) {
+        if (static_cast<time_t>(expectedModificationTime) != modificationTime)
+            return -1;
+    }
+
+    // Now get the file size.
+    long long length;
+    if (!getFileSize(path, length))
+        return -1;
+
+    return length;
+}
+
+bool FileStream::openForRead(const String& path, long long offset, long long length)
+{
+    if (isHandleValid(m_handle))
+        return true;
+
+    // Open the file.
+    m_handle = openFile(path, OpenForRead);
+    if (!isHandleValid(m_handle))
+        return false;
+
+    // Jump to the beginning position if the file has been sliced.
+    if (offset > 0) {
+        if (seekFile(m_handle, offset, SeekFromBeginning) < 0)
+            return false;
+    }
+
+    m_totalBytesToRead = length;
+    m_bytesProcessed = 0;
+
+    return true;
+}
+
+bool FileStream::openForWrite(const String&)
+{
+    // FIXME: to be implemented.
+    return false;
+}
+
+void FileStream::close()
+{
+    if (isHandleValid(m_handle)) {
+        closeFile(m_handle);
+        m_handle = invalidPlatformFileHandle;
+    }
+}
+
+int FileStream::read(char* buffer, int bufferSize)
+{
+    if (!isHandleValid(m_handle))
+        return -1;
+
+    long long remaining = m_totalBytesToRead - m_bytesProcessed;
+    int bytesToRead = (remaining < bufferSize) ? static_cast<int>(remaining) : bufferSize;
+    int bytesRead = 0;
+    if (bytesToRead > 0)
+        bytesRead = readFromFile(m_handle, buffer, bytesToRead);
+    if (bytesRead < 0)
+        return -1;
+    if (bytesRead > 0)
+        m_bytesProcessed += bytesRead;
+
+    return bytesRead;
+}
+
+int FileStream::write(const KURL&, long long, int)
+{
+    // FIXME: to be implemented.
+    return -1;
+}
+
+bool FileStream::truncate(long long)
+{
+    // FIXME: to be implemented.
+    return false;
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(BLOB) || ENABLE(FILE_WRITER)