+/**************************************************************************
+ *
+ * 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"
close();
}
+
+File::Offset File::currentOffset()
+{
+ return File::Offset();
+}
+
+void File::setCurrentOffset(const File::Offset &offset)
+{
+}
+
bool File::isZLibCompressed(const std::string &filename)
{
std::fstream stream(filename.c_str(),
return (byte1 == SNAPPY_BYTE1 && byte2 == SNAPPY_BYTE2);
}
+typedef struct gz_stream {
+ z_stream stream;
+ int z_err; /* error code for last stream operation */
+ int z_eof; /* set if end of input file */
+ FILE *file; /* .gz file */
+} gz_dummy_stream;
ZLibFile::ZLibFile(const std::string &filename,
File::Mode mode)
{
m_gzFile = gzopen(filename.c_str(),
(mode == File::Write) ? "wb" : "rb");
+
+ if (mode == File::Read && m_gzFile) {
+ //XXX: unfortunately zlib doesn't support
+ // SEEK_END or we could've done:
+ //m_endOffset = gzseek(m_gzFile, 0, SEEK_END);
+ //gzrewind(m_gzFile);
+ gz_dummy_stream *stream = (gz_dummy_stream *)m_gzFile;
+ long loc = ftell(stream->file);
+ fseek(stream->file,0,SEEK_END);
+ m_endOffset = ftell(stream->file);
+ fseek(stream->file, loc, SEEK_SET);
+ }
+
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) != -1;
}
-bool ZLibFile::rawRead(void *buffer, int length)
+bool ZLibFile::rawRead(void *buffer, size_t length)
{
return gzread(m_gzFile, buffer, length) != -1;
}
}
}
-void ZLibFile::rawFlush(FlushType type)
+void ZLibFile::rawFlush()
{
gzflush(m_gzFile, Z_SYNC_FLUSH);
}
+
+
+bool ZLibFile::supportsOffsets() const
+{
+ return false;
+}
+
+bool ZLibFile::rawSkip(size_t)
+{
+ return false;
+}
+
+int ZLibFile::rawPercentRead()
+{
+ gz_dummy_stream *stream = (gz_dummy_stream *)m_gzFile;
+ return 100 * (ftell(stream->file) / m_endOffset);
+}