+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+
#ifndef TRACE_FILE_HPP
#define TRACE_FILE_HPP
#include <string>
#include <fstream>
+#include <stdint.h>
namespace Trace {
Read,
Write
};
- enum FlushType {
- FlushShallow,
- FlushDeep
+ struct Offset {
+ Offset()
+ : chunk(0),
+ offsetInChunk(0)
+ {}
+ uint64_t chunk;
+ uint32_t offsetInChunk;
};
+
public:
static bool isZLibCompressed(const std::string &filename);
static bool isSnappyCompressed(const std::string &filename);
bool write(const void *buffer, int length);
bool read(void *buffer, int length);
void close();
- void flush(FlushType type = FlushShallow);
+ void flush(void);
int getc();
+ virtual bool supportsOffsets() const = 0;
+ virtual File::Offset currentOffset();
+ virtual void setCurrentOffset(const File::Offset &offset);
protected:
virtual bool rawOpen(const std::string &filename, File::Mode mode) = 0;
virtual bool rawWrite(const void *buffer, int length) = 0;
virtual bool rawRead(void *buffer, int length) = 0;
virtual int rawGetc() = 0;
virtual void rawClose() = 0;
- virtual void rawFlush(FlushType type) = 0;
+ virtual void rawFlush() = 0;
protected:
std::string m_filename;
}
}
-inline void File::flush(File::FlushType type)
+inline void File::flush(void)
{
- rawFlush(type);
+ rawFlush();
}
inline int File::getc()
{
if (!m_isOpened || m_mode != File::Read) {
- return 0;
+ return -1;
}
return rawGetc();
}
File::Mode mode = File::Read);
virtual ~ZLibFile();
+
+ virtual bool supportsOffsets() const;
protected:
virtual bool rawOpen(const std::string &filename, File::Mode mode);
virtual bool rawWrite(const void *buffer, int length);
virtual bool rawRead(void *buffer, int length);
virtual int rawGetc();
virtual void rawClose();
- virtual void rawFlush(FlushType type);
+ virtual void rawFlush();
private:
void *m_gzFile;
};
+inline bool
+operator<(const File::Offset &one, const File::Offset &two)
+{
+ return one.chunk < two.chunk ||
+ (one.chunk == two.chunk && one.offsetInChunk < two.offsetInChunk);
+}
+
+inline bool
+operator==(const File::Offset &one, const File::Offset &two)
+{
+ return one.chunk == two.chunk &&
+ one.offsetInChunk == two.offsetInChunk;
+}
+
+inline bool
+operator>=(const File::Offset &one, const File::Offset &two)
+{
+ return one.chunk > two.chunk ||
+ (one.chunk == two.chunk && one.offsetInChunk >= two.offsetInChunk);
+}
+
+inline bool
+operator>(const File::Offset &one, const File::Offset &two)
+{
+ return two < one;
+}
+
+inline bool
+operator<=(const File::Offset &one, const File::Offset &two)
+{
+ return two >= one;
+}
+
+
}
#endif