X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=trace_file.hpp;h=4b1b70ddad6f6bd886ac7aa51c28f5604b281faf;hb=447f4a55a01e82b0265f44212b8d439fa83750d7;hp=fb61b985d8c2e98862a95af05d37a897a1988c66;hpb=1035b94bc86d70dc0f6af1adcf7f20fd5d2bdca3;p=apitrace

diff --git a/trace_file.hpp b/trace_file.hpp
index fb61b98..4b1b70d 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(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);
@@ -26,83 +58,165 @@ 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);
+    bool write(const void *buffer, size_t length);
+    bool read(void *buffer, size_t length);
     void close();
-    void flush(FlushType type = FlushShallow);
+    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(FlushType type) = 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(FlushType type);
+    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(FlushType type);
+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;
+}
 
 
 }