Make sure that the size of the compressed length is constant.

[apitrace] / trace_file.hpp

diff --git a/trace_file.hpp b/trace_file.hpp
index 9ea6bb8dd893b067754af82070f29cb1047787bd..fc42e9b9e7f27ccdc0685d7833d14077bfd99272 100644 (file)
--- a/trace_file.hpp
+++ b/trace_file.hpp
@@ -2,6 +2,7 @@
 #define TRACE_FILE_HPP
 
 #include <string>
+#include <fstream>
 
 namespace Trace {
 
@@ -11,6 +12,13 @@ public:
         Read,
         Write
     };
+    enum FlushType {
+        FlushShallow,
+        FlushDeep
+    };
+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);
@@ -18,22 +26,23 @@ public:
 
     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);
     void close();
-    void flush();
-    char getc();
+    void flush(FlushType type = FlushShallow);
+    int getc();
 
 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 char rawGetc() = 0;
+    virtual int rawGetc() = 0;
     virtual void rawClose() = 0;
-    virtual void rawFlush() = 0;
+    virtual void rawFlush(FlushType type) = 0;
 
 protected:
     std::string m_filename;
@@ -41,6 +50,69 @@ protected:
     bool m_isOpened;
 };
 
+inline bool File::isOpened() const
+{
+    return m_isOpened;
+}
+
+inline File::Mode File::mode() const
+{
+    return m_mode;
+}
+
+inline std::string File::filename() const
+{
+    return m_filename;
+}
+
+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, int length)
+{
+    if (!m_isOpened || m_mode != File::Write) {
+        return false;
+    }
+    return rawWrite(buffer, length);
+}
+
+inline bool File::read(void *buffer, int length)
+{
+    if (!m_isOpened || m_mode != File::Read) {
+        return false;
+    }
+    return rawRead(buffer, length);
+}
+
+inline void File::close()
+{
+    if (m_isOpened) {
+        rawClose();
+        m_isOpened = false;
+    }
+}
+
+inline void File::flush(File::FlushType type)
+{
+    rawFlush(type);
+}
+
+inline int File::getc()
+{
+    if (!m_isOpened || m_mode != File::Read) {
+        return 0;
+    }
+    return rawGetc();
+}
+
 class ZLibFile : public File {
 public:
     ZLibFile(const std::string &filename = std::string(),
@@ -51,9 +123,9 @@ 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 char rawGetc();
+    virtual int rawGetc();
     virtual void rawClose();
-    virtual void rawFlush();
+    virtual void rawFlush(FlushType type);
 private:
     void *m_gzFile;
 };