+/**************************************************************************
+ *
+ * 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
};
+ struct Offset {
+ Offset(uint64_t _chunk = 0, uint32_t _offsetInChunk = 0)
+ : chunk(_chunk),
+ offsetInChunk(_offsetInChunk)
+ {}
+ uint64_t chunk;
+ uint32_t offsetInChunk;
+ };
+
+public:
+ static bool isZLibCompressed(const std::string &filename);
+ static bool isSnappyCompressed(const std::string &filename);
public:
File(const std::string &filename = std::string(),
File::Mode mode = File::Read);
bool isOpened() const;
File::Mode mode() const;
- std::string filename() const;
bool open(const std::string &filename, File::Mode mode);
- bool write(const void *buffer, int length);
- bool read(void *buffer, int length);
+ bool write(const void *buffer, size_t length);
+ bool read(void *buffer, size_t length);
void close();
- void flush();
+ void flush(void);
int getc();
+ bool skip(size_t length);
+ int percentRead();
+ virtual bool supportsOffsets() const = 0;
+ virtual File::Offset currentOffset() = 0;
+ 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 bool rawWrite(const void *buffer, size_t length) = 0;
+ virtual bool rawRead(void *buffer, size_t length) = 0;
virtual int rawGetc() = 0;
virtual void rawClose() = 0;
virtual void rawFlush() = 0;
+ virtual bool rawSkip(size_t length) = 0;
+ virtual int rawPercentRead() = 0;
protected:
- std::string m_filename;
File::Mode m_mode;
bool m_isOpened;
};
+inline bool File::isOpened() const
+{
+ return m_isOpened;
+}
+
+inline File::Mode File::mode() const
+{
+ return m_mode;
+}
+
+inline bool File::open(const std::string &filename, File::Mode mode)
+{
+ if (m_isOpened) {
+ close();
+ }
+ m_isOpened = rawOpen(filename, mode);
+ m_mode = mode;
+
+ return m_isOpened;
+}
+
+inline bool File::write(const void *buffer, size_t length)
+{
+ if (!m_isOpened || m_mode != File::Write) {
+ return false;
+ }
+ return rawWrite(buffer, length);
+}
+
+inline bool File::read(void *buffer, size_t length)
+{
+ if (!m_isOpened || m_mode != File::Read) {
+ return false;
+ }
+ return rawRead(buffer, length);
+}
+
+inline int File::percentRead()
+{
+ if (!m_isOpened || m_mode != File::Read) {
+ return 0;
+ }
+ return rawPercentRead();
+}
+
+inline void File::close()
+{
+ if (m_isOpened) {
+ rawClose();
+ m_isOpened = false;
+ }
+}
+
+inline void File::flush(void)
+{
+ if (m_mode == File::Write) {
+ rawFlush();
+ }
+}
+
+inline int File::getc()
+{
+ if (!m_isOpened || m_mode != File::Read) {
+ return -1;
+ }
+ return rawGetc();
+}
+
+inline bool File::skip(size_t length)
+{
+ if (!m_isOpened || m_mode != File::Read) {
+ return false;
+ }
+ return rawSkip(length);
+}
+
class ZLibFile : public File {
public:
ZLibFile(const std::string &filename = std::string(),
File::Mode mode = File::Read);
virtual ~ZLibFile();
+
+ virtual bool supportsOffsets() const;
+ virtual File::Offset currentOffset();
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 bool rawWrite(const void *buffer, size_t length);
+ virtual bool rawRead(void *buffer, size_t length);
virtual int rawGetc();
virtual void rawClose();
virtual void rawFlush();
+ virtual bool rawSkip(size_t length);
+ virtual int rawPercentRead();
private:
void *m_gzFile;
+ double m_endOffset;
};
-namespace snappy {
- class File;
+inline bool
+operator<(const File::Offset &one, const File::Offset &two)
+{
+ return one.chunk < two.chunk ||
+ (one.chunk == two.chunk && one.offsetInChunk < two.offsetInChunk);
}
-#define SNAPPY_CHUNK_SIZE (1 * 1024 * 1024)
-class SnappyFile : public File {
-public:
- SnappyFile(const std::string &filename = std::string(),
- File::Mode mode = File::Read);
- virtual ~SnappyFile();
+inline bool
+operator==(const File::Offset &one, const File::Offset &two)
+{
+ return one.chunk == two.chunk &&
+ one.offsetInChunk == two.offsetInChunk;
+}
-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();
+inline bool
+operator>=(const File::Offset &one, const File::Offset &two)
+{
+ return one.chunk > two.chunk ||
+ (one.chunk == two.chunk && one.offsetInChunk >= two.offsetInChunk);
+}
-private:
- inline int freeCacheSize() const
- {
- if (m_cacheSize > 0)
- return m_cacheSize - (m_cachePtr - m_cache);
- else
- return 0;
- }
- void flushCache();
- void createCache(size_t size);
-private:
- std::fstream m_stream;
- char *m_cache;
- char *m_cachePtr;
- size_t m_cacheSize;
+inline bool
+operator>(const File::Offset &one, const File::Offset &two)
+{
+ return two < one;
+}
- char *m_compressedCache;
-};
+inline bool
+operator<=(const File::Offset &one, const File::Offset &two)
+{
+ return two >= one;
+}
}
projects / apitrace / blobdiff