X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=trace_file.cpp;h=45473b345ffa3a3cae447ccab1fe101e93f91514;hb=ebf971eec6c3a5f98885cc418e04690ba213b645;hp=517e2219cf70fdd8924d9844dca7a0e14aaf9036;hpb=20b1f6dc3783cec612fe3712c4b6c1ca65d4a5f4;p=apitrace

diff --git a/trace_file.cpp b/trace_file.cpp
index 517e221..45473b3 100644
--- a/trace_file.cpp
+++ b/trace_file.cpp
@@ -97,6 +97,12 @@ 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)
@@ -115,8 +121,15 @@ bool ZLibFile::rawOpen(const std::string &filename, File::Mode mode)
                       (mode == File::Write) ? "wb" : "rb");
 
     if (mode == File::Read && m_gzFile) {
-        m_endOffset = gzseek(m_gzFile, 0, SEEK_END);
-        gzrewind(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;
@@ -163,5 +176,6 @@ bool ZLibFile::rawSkip(size_t)
 
 int ZLibFile::rawPercentRead()
 {
-    return 100 * (gztell(m_gzFile) / m_endOffset);
+    gz_dummy_stream *stream = (gz_dummy_stream *)m_gzFile;
+    return 100 * (ftell(stream->file) / m_endOffset);
 }