+/**************************************************************************
+ *
+ * Copyright 2011 Zack Rusin
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
#include "trace_file.hpp"
+#include "trace_snappyfile.hpp"
+
+#include <assert.h>
+#include <string.h>
+
#include <zlib.h>
+#include "os.hpp"
+
+#include <iostream>
+
using namespace Trace;
+
File::File(const std::string &filename,
File::Mode mode)
: m_filename(filename),
close();
}
-bool File::isOpened() const
-{
- return m_isOpened;
-}
-File::Mode File::mode() const
+File::Offset File::currentOffset()
{
- return m_mode;
+ return File::Offset();
}
-std::string File::filename() const
+void File::setCurrentOffset(const File::Offset &offset)
{
- return m_filename;
}
-bool File::open(const std::string &filename, File::Mode mode)
+bool File::isZLibCompressed(const std::string &filename)
{
- if (m_isOpened) {
- close();
- }
- m_isOpened = rawOpen(filename, mode);
- return m_isOpened;
-}
-
-bool File::write(const void *buffer, int length)
-{
- if (!m_isOpened || m_mode != File::Write) {
+ std::fstream stream(filename.c_str(),
+ std::fstream::binary | std::fstream::in);
+ if (!stream.is_open())
return false;
- }
- return rawWrite(buffer, length);
+
+ unsigned char byte1, byte2;
+ stream >> byte1;
+ stream >> byte2;
+ stream.close();
+
+ return (byte1 == 0x1f && byte2 == 0x8b);
}
-bool File::read(void *buffer, int length)
+
+bool File::isSnappyCompressed(const std::string &filename)
{
- if (!m_isOpened || m_mode != File::Read) {
+ std::fstream stream(filename.c_str(),
+ std::fstream::binary | std::fstream::in);
+ if (!stream.is_open())
return false;
- }
- return rawRead(buffer, length);
-}
-void File::close()
-{
- if (m_isOpened) {
- rawClose();
- m_isOpened = false;
- }
-}
+ unsigned char byte1, byte2;
+ stream >> byte1;
+ stream >> byte2;
+ stream.close();
-void File::flush()
-{
- rawFlush();
+ return (byte1 == SNAPPY_BYTE1 && byte2 == SNAPPY_BYTE2);
}
-char File::getc()
-{
- if (!m_isOpened || m_mode != File::Read) {
- return 0;
- }
- return rawGetc();
-}
ZLibFile::ZLibFile(const std::string &filename,
File::Mode mode)
return m_gzFile != NULL;
}
-bool ZLibFile::rawWrite(const void *buffer, int length)
+bool ZLibFile::rawWrite(const void *buffer, size_t length)
{
- return gzwrite(m_gzFile, buffer, length);
+ return gzwrite(m_gzFile, buffer, length) != -1;
}
-bool ZLibFile::rawRead(void *buffer, int length)
+bool ZLibFile::rawRead(void *buffer, size_t length)
{
- return gzread(m_gzFile, buffer, length);
+ return gzread(m_gzFile, buffer, length) != -1;
}
-char ZLibFile::rawGetc()
+int ZLibFile::rawGetc()
{
return gzgetc(m_gzFile);
}
{
gzflush(m_gzFile, Z_SYNC_FLUSH);
}
+
+
+bool ZLibFile::supportsOffsets() const
+{
+ return false;
+}
+
+bool ZLibFile::rawSkip(size_t)
+{
+ return false;
+}