X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=trace_file.hpp;h=2129d1e388f197b9e2cd7e844ddcf836b3e4cbdc;hb=f562f318ddee6da2041696887e2195fc3c96d740;hp=fc42e9b9e7f27ccdc0685d7833d14077bfd99272;hpb=124cd34846abf59579fe7cbd819a3a719a07a29f;p=apitrace

diff --git a/trace_file.hpp b/trace_file.hpp
index fc42e9b..2129d1e 100644
--- a/trace_file.hpp
+++ b/trace_file.hpp
@@ -1,8 +1,35 @@
+/**************************************************************************
+ *
+ * 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 {
 
@@ -12,10 +39,15 @@ public:
         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);
@@ -33,16 +65,19 @@ public:
     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;
@@ -100,15 +135,15 @@ inline void File::close()
     }
 }
 
-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();
 }
@@ -119,17 +154,53 @@ public:
              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