X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=trace_file.cpp;h=f48c1aa9189c8b04c23a92448afc5b51ddd9d216;hb=c592957de1083b4e32ee58c0ea2e5feaa9085b47;hp=758ecd78c264d6e218b001473489394607da4b8f;hpb=b5f2ee344ef2914ca141608107c571ec0c28c6a6;p=apitrace

diff --git a/trace_file.cpp b/trace_file.cpp
index 758ecd7..f48c1aa 100644
--- a/trace_file.cpp
+++ b/trace_file.cpp
@@ -1,3 +1,29 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+
 #include "trace_file.hpp"
 
 #include "trace_snappyfile.hpp"
@@ -16,82 +42,23 @@ using namespace Trace;
 
 File::File(const std::string &filename,
            File::Mode mode)
-    : m_filename(filename),
-      m_mode(mode),
+    : m_mode(mode),
       m_isOpened(false)
 {
-    if (!m_filename.empty()) {
-        open(m_filename, m_mode);
+    if (!filename.empty()) {
+        open(filename, m_mode);
     }
 }
 
-
 File::~File()
 {
     close();
 }
 
-bool File::isOpened() const
-{
-    return m_isOpened;
-}
 
-File::Mode File::mode() const
+void File::setCurrentOffset(const File::Offset &offset)
 {
-    return m_mode;
-}
-
-std::string File::filename() const
-{
-    return m_filename;
-}
-
-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;
-}
-
-bool File::write(const void *buffer, int length)
-{
-    if (!m_isOpened || m_mode != File::Write) {
-        return false;
-    }
-    return rawWrite(buffer, length);
-}
-
-bool File::read(void *buffer, int length)
-{
-    if (!m_isOpened || m_mode != File::Read) {
-        return false;
-    }
-    return rawRead(buffer, length);
-}
-
-void File::close()
-{
-    if (m_isOpened) {
-        rawClose();
-        m_isOpened = false;
-    }
-}
-
-void File::flush(FlushType type)
-{
-    rawFlush(type);
-}
-
-int File::getc()
-{
-    if (!m_isOpened || m_mode != File::Read) {
-        return 0;
-    }
-    return rawGetc();
+    assert(0);
 }
 
 bool File::isZLibCompressed(const std::string &filename)
@@ -125,6 +92,12 @@ bool File::isSnappyCompressed(const std::string &filename)
     return (byte1 == SNAPPY_BYTE1 && byte2 == SNAPPY_BYTE2);
 }
 
+typedef struct gz_stream {
+    z_stream stream;
+    int      z_err;   /* error code for last stream operation */
+    int      z_eof;   /* set if end of input file */
+    FILE     *file;   /* .gz file */
+} gz_dummy_stream;
 
 ZLibFile::ZLibFile(const std::string &filename,
                    File::Mode mode)
@@ -141,15 +114,28 @@ bool ZLibFile::rawOpen(const std::string &filename, File::Mode mode)
 {
     m_gzFile = gzopen(filename.c_str(),
                       (mode == File::Write) ? "wb" : "rb");
+
+    if (mode == File::Read && m_gzFile) {
+        //XXX: unfortunately zlib doesn't support
+        //     SEEK_END or we could've done:
+        //m_endOffset = gzseek(m_gzFile, 0, SEEK_END);
+        //gzrewind(m_gzFile);
+        gz_dummy_stream *stream = (gz_dummy_stream *)m_gzFile;
+        long loc = ftell(stream->file);
+        fseek(stream->file,0,SEEK_END);
+        m_endOffset = ftell(stream->file);
+        fseek(stream->file, loc, SEEK_SET);
+    }
+
     return m_gzFile != NULL;
 }
 
-bool ZLibFile::rawWrite(const void *buffer, int length)
+bool ZLibFile::rawWrite(const void *buffer, size_t length)
 {
     return gzwrite(m_gzFile, buffer, length) != -1;
 }
 
-bool ZLibFile::rawRead(void *buffer, int length)
+bool ZLibFile::rawRead(void *buffer, size_t length)
 {
     return gzread(m_gzFile, buffer, length) != -1;
 }
@@ -167,7 +153,28 @@ void ZLibFile::rawClose()
     }
 }
 
-void ZLibFile::rawFlush(FlushType type)
+void ZLibFile::rawFlush()
 {
     gzflush(m_gzFile, Z_SYNC_FLUSH);
 }
+
+File::Offset ZLibFile::currentOffset()
+{
+    return File::Offset(gztell(m_gzFile));
+}
+
+bool ZLibFile::supportsOffsets() const
+{
+    return false;
+}
+
+bool ZLibFile::rawSkip(size_t)
+{
+    return false;
+}
+
+int ZLibFile::rawPercentRead()
+{
+    gz_dummy_stream *stream = (gz_dummy_stream *)m_gzFile;
+    return 100 * (ftell(stream->file) / m_endOffset);
+}