refine the file stream, to file reader and writer. 0.9.142

@@ -121,14 +121,14 @@ int process(const char* in_flv_file, const char* out_flv_file, srs_flv_t* pic, s
     srs_amf0_t amf0_data = NULL;
     srs_amf0_t amf0_data = NULL;
     srs_amf0_t filepositions = NULL;
     srs_amf0_t filepositions = NULL;
     
     
-    if ((ic = srs_flv_open_read(in_flv_file)) == NULL) {
+    if ((ic = srs_flv_open(in_flv_file)) == NULL) {
         ret = 2;
         ret = 2;
         trace("open input flv file failed. ret=%d", ret);
         trace("open input flv file failed. ret=%d", ret);
         return ret;
         return ret;
     }
     }
     *pic = ic;
     *pic = ic;
     
     
-    if ((oc = srs_flv_open_write(out_flv_file)) == NULL) {
+    if ((oc = srs_flv_open(out_flv_file)) == NULL) {
         ret = 2;
         ret = 2;
         trace("open output flv file failed. ret=%d", ret);
         trace("open output flv file failed. ret=%d", ret);
         return ret;
         return ret;

@@ -64,7 +64,7 @@ int main(int argc, char** argv)
     trace("version: %d.%d.%d", srs_version_major(), srs_version_minor(), srs_version_revision());
     trace("version: %d.%d.%d", srs_version_major(), srs_version_minor(), srs_version_revision());
     trace("input:  %s", in_flv_file);
     trace("input:  %s", in_flv_file);
 
 
-    if ((flv = srs_flv_open_read(in_flv_file)) == NULL) {
+    if ((flv = srs_flv_open(in_flv_file)) == NULL) {
         ret = 2;
         ret = 2;
         trace("open flv file failed. ret=%d", ret);
         trace("open flv file failed. ret=%d", ret);
         return ret;
         return ret;

@@ -93,7 +93,7 @@ int main(int argc, char** argv)
     trace("input:  %s", in_flv_file);
     trace("input:  %s", in_flv_file);
     trace("output: %s", out_rtmp_url);
     trace("output: %s", out_rtmp_url);
 
 
-    if ((flv = srs_flv_open_read(in_flv_file)) == NULL) {
+    if ((flv = srs_flv_open(in_flv_file)) == NULL) {
         ret = 2;
         ret = 2;
         trace("open flv file failed. ret=%d", ret);
         trace("open flv file failed. ret=%d", ret);
         return ret;
         return ret;

@@ -71,7 +71,7 @@ SrsDvrPlan::SrsDvrPlan()
     _req = NULL;
     _req = NULL;
     jitter = NULL;
     jitter = NULL;
     dvr_enabled = false;
     dvr_enabled = false;
-    fs = new SrsFileStream();
+    fs = new SrsFileWriter();
     enc = new SrsFlvEncoder();
     enc = new SrsFlvEncoder();
     segment = new SrsFlvSegment();
     segment = new SrsFlvSegment();
     jitter_algorithm = SrsRtmpJitterAlgorithmOFF;
     jitter_algorithm = SrsRtmpJitterAlgorithmOFF;
@@ -283,7 +283,7 @@ int SrsDvrPlan::flv_open(string stream, string path)
     segment->reset();
     segment->reset();
     
     
     std::string tmp_file = path + ".tmp";
     std::string tmp_file = path + ".tmp";
-    if ((ret = fs->open_write(tmp_file)) != ERROR_SUCCESS) {
+    if ((ret = fs->open(tmp_file)) != ERROR_SUCCESS) {
         srs_error("open file stream for file %s failed. ret=%d", path.c_str(), ret);
         srs_error("open file stream for file %s failed. ret=%d", path.c_str(), ret);
         return ret;
         return ret;
     }
     }
@@ -569,8 +569,8 @@ int SrsDvrHssPlan::on_meta_data(SrsOnMetaDataPacket* metadata)
         << "/" << req->app << "/" 
         << "/" << req->app << "/" 
         << req->stream << ".header.flv";
         << req->stream << ".header.flv";
         
         
-    SrsFileStream fs;
-    if ((ret = fs.open_write(path.str().c_str())) != ERROR_SUCCESS) {
+    SrsFileWriter fs;
+    if ((ret = fs.open(path.str().c_str())) != ERROR_SUCCESS) {
         return ret;
         return ret;
     }
     }
     
     

@@ -39,7 +39,7 @@ class SrsStream;
 class SrsRtmpJitter;
 class SrsRtmpJitter;
 class SrsOnMetaDataPacket;
 class SrsOnMetaDataPacket;
 class SrsSharedPtrMessage;
 class SrsSharedPtrMessage;
-class SrsFileStream;
+class SrsFileWriter;
 class SrsFlvEncoder;
 class SrsFlvEncoder;
 
 
 #include <srs_app_source.hpp>
 #include <srs_app_source.hpp>
@@ -114,7 +114,7 @@ protected:
     SrsFlvSegment* segment;
     SrsFlvSegment* segment;
     SrsRequest* _req;
     SrsRequest* _req;
     bool dvr_enabled;
     bool dvr_enabled;
-    SrsFileStream* fs;
+    SrsFileWriter* fs;
 public:
 public:
     SrsDvrPlan();
     SrsDvrPlan();
     virtual ~SrsDvrPlan();
     virtual ~SrsDvrPlan();

@@ -300,10 +300,10 @@ int SrsHttpVhost::response_flv_file2(SrsSocket* skt, SrsHttpMessage* req, string
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-    SrsFileStream fs;
+    SrsFileReader fs;
     
     
     // open flv file
     // open flv file
-    if ((ret = fs.open_read(fullpath)) != ERROR_SUCCESS) {
+    if ((ret = fs.open(fullpath)) != ERROR_SUCCESS) {
         return ret;
         return ret;
     }
     }
     
     

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 // current release version
 #define VERSION_MAJOR "0"
 #define VERSION_MAJOR "0"
 #define VERSION_MINOR "9"
 #define VERSION_MINOR "9"
-#define VERSION_REVISION "141"
+#define VERSION_REVISION "142"
 #define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
 #define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
 // server info.
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
 #define RTMP_SIG_SRS_KEY "SRS"

@@ -37,17 +37,16 @@ using namespace std;
 #define SRS_FLV_TAG_HEADER_SIZE 11
 #define SRS_FLV_TAG_HEADER_SIZE 11
 #define SRS_FLV_PREVIOUS_TAG_SIZE 4
 #define SRS_FLV_PREVIOUS_TAG_SIZE 4
 
 
-SrsFileStream::SrsFileStream()
+SrsFileWriter::SrsFileWriter()
 {
 {
-    fd = -1;
 }
 }
 
 
-SrsFileStream::~SrsFileStream()
+SrsFileWriter::~SrsFileWriter()
 {
 {
     close();
     close();
 }
 }
 
 
-int SrsFileStream::open_write(string file)
+int SrsFileWriter::open(string file)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
@@ -71,28 +70,7 @@ int SrsFileStream::open_write(string file)
     return ret;
     return ret;
 }
 }
 
 
-int SrsFileStream::open_read(string file)
-{
-    int ret = ERROR_SUCCESS;
-    
-    if (fd > 0) {
-        ret = ERROR_SYSTEM_FILE_ALREADY_OPENED;
-        srs_error("file %s already opened. ret=%d", _file.c_str(), ret);
-        return ret;
-    }
-
-    if ((fd = ::open(file.c_str(), O_RDONLY)) < 0) {
-        ret = ERROR_SYSTEM_FILE_OPENE;
-        srs_error("open file %s failed. ret=%d", file.c_str(), ret);
-        return ret;
-    }
-    
-    _file = file;
-    
-    return ret;
-}
-
-void SrsFileStream::close()
+void SrsFileWriter::close()
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
@@ -110,63 +88,99 @@ void SrsFileStream::close()
     return;
     return;
 }
 }
 
 
-bool SrsFileStream::is_open()
+bool SrsFileWriter::is_open()
 {
 {
     return fd > 0;
     return fd > 0;
 }
 }
 
 
-int SrsFileStream::read(void* buf, size_t count, ssize_t* pnread)
+int64_t SrsFileWriter::tellg()
+{
+    return (int64_t)::lseek(fd, 0, SEEK_CUR);
+}
+
+int SrsFileWriter::write(void* buf, size_t count, ssize_t* pnwrite)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-    ssize_t nread;
-    if ((nread = ::read(fd, buf, count)) < 0) {
-        ret = ERROR_SYSTEM_FILE_READ;
-        srs_error("read from file %s failed. ret=%d", _file.c_str(), ret);
+    ssize_t nwrite;
+    if ((nwrite = ::write(fd, buf, count)) < 0) {
+        ret = ERROR_SYSTEM_FILE_WRITE;
+        srs_error("write to file %s failed. ret=%d", _file.c_str(), ret);
         return ret;
         return ret;
     }
     }
     
     
-    if (nread == 0) {
-        ret = ERROR_SYSTEM_FILE_EOF;
+    if (pnwrite != NULL) {
+        *pnwrite = nwrite;
+    }
+    
+    return ret;
+}
+
+SrsFileReader::SrsFileReader()
+{
+    fd = -1;
+}
+
+SrsFileReader::~SrsFileReader()
+{
+    close();
+}
+
+int SrsFileReader::open(string file)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (fd > 0) {
+        ret = ERROR_SYSTEM_FILE_ALREADY_OPENED;
+        srs_error("file %s already opened. ret=%d", _file.c_str(), ret);
         return ret;
         return ret;
     }
     }
 
 
-    if (pnread != NULL) {
-        *pnread = nread;
+    if ((fd = ::open(file.c_str(), O_RDONLY)) < 0) {
+        ret = ERROR_SYSTEM_FILE_OPENE;
+        srs_error("open file %s failed. ret=%d", file.c_str(), ret);
+        return ret;
     }
     }
     
     
+    _file = file;
+    
     return ret;
     return ret;
 }
 }
 
 
-int SrsFileStream::write(void* buf, size_t count, ssize_t* pnwrite)
+void SrsFileReader::close()
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-    ssize_t nwrite;
-    if ((nwrite = ::write(fd, buf, count)) < 0) {
-        ret = ERROR_SYSTEM_FILE_WRITE;
-        srs_error("write to file %s failed. ret=%d", _file.c_str(), ret);
-        return ret;
+    if (fd < 0) {
+        return;
     }
     }
     
     
-    if (pnwrite != NULL) {
-        *pnwrite = nwrite;
+    if (::close(fd) < 0) {
+        ret = ERROR_SYSTEM_FILE_CLOSE;
+        srs_error("close file %s failed. ret=%d", _file.c_str(), ret);
+        return;
     }
     }
+    fd = -1;
     
     
-    return ret;
+    return;
 }
 }
 
 
-int64_t SrsFileStream::tellg()
+int64_t SrsFileReader::tellg()
 {
 {
     return (int64_t)::lseek(fd, 0, SEEK_CUR);
     return (int64_t)::lseek(fd, 0, SEEK_CUR);
 }
 }
 
 
-int64_t SrsFileStream::lseek(int64_t offset)
+void SrsFileReader::skip(int64_t size)
+{
+    ::lseek(fd, size, SEEK_CUR);
+}
+
+int64_t SrsFileReader::lseek(int64_t offset)
 {
 {
     return (int64_t)::lseek(fd, offset, SEEK_SET);
     return (int64_t)::lseek(fd, offset, SEEK_SET);
 }
 }
 
 
-int64_t SrsFileStream::filesize()
+int64_t SrsFileReader::filesize()
 {
 {
     int64_t cur = tellg();
     int64_t cur = tellg();
     int64_t size = (int64_t)::lseek(fd, 0, SEEK_END);
     int64_t size = (int64_t)::lseek(fd, 0, SEEK_END);
@@ -174,9 +188,27 @@ int64_t SrsFileStream::filesize()
     return size;
     return size;
 }
 }
 
 
-void SrsFileStream::skip(int64_t size)
+int SrsFileReader::read(void* buf, size_t count, ssize_t* pnread)
 {
 {
-    ::lseek(fd, size, SEEK_CUR);
+    int ret = ERROR_SUCCESS;
+    
+    ssize_t nread;
+    if ((nread = ::read(fd, buf, count)) < 0) {
+        ret = ERROR_SYSTEM_FILE_READ;
+        srs_error("read from file %s failed. ret=%d", _file.c_str(), ret);
+        return ret;
+    }
+    
+    if (nread == 0) {
+        ret = ERROR_SYSTEM_FILE_EOF;
+        return ret;
+    }
+    
+    if (pnread != NULL) {
+        *pnread = nread;
+    }
+    
+    return ret;
 }
 }
 
 
 SrsFlvEncoder::SrsFlvEncoder()
 SrsFlvEncoder::SrsFlvEncoder()
@@ -190,7 +222,7 @@ SrsFlvEncoder::~SrsFlvEncoder()
     srs_freep(tag_stream);
     srs_freep(tag_stream);
 }
 }
 
 
-int SrsFlvEncoder::initialize(SrsFileStream* fs)
+int SrsFlvEncoder::initialize(SrsFileWriter* fs)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
@@ -377,7 +409,7 @@ SrsFlvFastDecoder::~SrsFlvFastDecoder()
     srs_freep(tag_stream);
     srs_freep(tag_stream);
 }
 }
 
 
-int SrsFlvFastDecoder::initialize(SrsFileStream* fs)
+int SrsFlvFastDecoder::initialize(SrsFileReader* fs)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
@@ -538,7 +570,7 @@ SrsFlvDecoder::~SrsFlvDecoder()
     srs_freep(tag_stream);
     srs_freep(tag_stream);
 }
 }
 
 
-int SrsFlvDecoder::initialize(SrsFileStream* fs)
+int SrsFlvDecoder::initialize(SrsFileReader* fs)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     

@@ -34,37 +34,47 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 class SrsStream;
 class SrsStream;
 
 
 /**
 /**
-* file stream to read/write file.
+* file writer, to write to file.
 */
 */
-class SrsFileStream
+class SrsFileWriter
 {
 {
 private:
 private:
     std::string _file;
     std::string _file;
     int fd;
     int fd;
 public:
 public:
-    SrsFileStream();
-    virtual ~SrsFileStream();
+    SrsFileWriter();
+    virtual ~SrsFileWriter();
 public:
 public:
-    virtual int open_write(std::string file);
-    virtual int open_read(std::string file);
+    virtual int open(std::string file);
     virtual void close();
     virtual void close();
+public:
     virtual bool is_open();
     virtual bool is_open();
+    virtual int64_t tellg();
 public:
 public:
-    /**
-    * @param pnread, return the read size. NULL to ignore.
-    */
-    virtual int read(void* buf, size_t count, ssize_t* pnread);
-    /**
-    * @param pnwrite, return the write size. NULL to ignore.
-    */
     virtual int write(void* buf, size_t count, ssize_t* pnwrite);
     virtual int write(void* buf, size_t count, ssize_t* pnwrite);
-    /**
-    * tell current offset of stream.
-    */
+};
+
+/**
+* file reader, to read from file.
+*/
+class SrsFileReader
+{
+private:
+    std::string _file;
+    int fd;
+public:
+    SrsFileReader();
+    virtual ~SrsFileReader();
+public:
+    virtual int open(std::string file);
+    virtual void close();
+public:
     virtual int64_t tellg();
     virtual int64_t tellg();
+    virtual void skip(int64_t size);
     virtual int64_t lseek(int64_t offset);
     virtual int64_t lseek(int64_t offset);
     virtual int64_t filesize();
     virtual int64_t filesize();
-    virtual void skip(int64_t size);
+public:
+    virtual int read(void* buf, size_t count, ssize_t* pnread);
 };
 };
 
 
 /**
 /**
@@ -73,7 +83,7 @@ public:
 class SrsFlvEncoder
 class SrsFlvEncoder
 {
 {
 private:
 private:
-    SrsFileStream* _fs;
+    SrsFileWriter* _fs;
 private:
 private:
     SrsStream* tag_stream;
     SrsStream* tag_stream;
 public:
 public:
@@ -84,7 +94,7 @@ public:
     * initialize the underlayer file stream,
     * initialize the underlayer file stream,
     * user can initialize multiple times to encode multiple flv files.
     * user can initialize multiple times to encode multiple flv files.
     */
     */
-    virtual int initialize(SrsFileStream* fs);
+    virtual int initialize(SrsFileWriter* fs);
 public:
 public:
     /**
     /**
     * write flv header.
     * write flv header.
@@ -122,7 +132,7 @@ private:
 class SrsFlvFastDecoder
 class SrsFlvFastDecoder
 {
 {
 private:
 private:
-    SrsFileStream* _fs;
+    SrsFileReader* _fs;
 private:
 private:
     SrsStream* tag_stream;
     SrsStream* tag_stream;
 public:
 public:
@@ -133,7 +143,7 @@ public:
     * initialize the underlayer file stream,
     * initialize the underlayer file stream,
     * user can initialize multiple times to encode multiple flv files.
     * user can initialize multiple times to encode multiple flv files.
     */
     */
-    virtual int initialize(SrsFileStream* fs);
+    virtual int initialize(SrsFileReader* fs);
 public:
 public:
     /**
     /**
     * read the flv header and size.
     * read the flv header and size.
@@ -156,7 +166,7 @@ public:
 class SrsFlvDecoder
 class SrsFlvDecoder
 {
 {
 private:
 private:
-    SrsFileStream* _fs;
+    SrsFileReader* _fs;
 private:
 private:
     SrsStream* tag_stream;
     SrsStream* tag_stream;
 public:
 public:
@@ -167,7 +177,7 @@ public:
     * initialize the underlayer file stream,
     * initialize the underlayer file stream,
     * user can initialize multiple times to decode multiple flv files.
     * user can initialize multiple times to decode multiple flv files.
     */
     */
-    virtual int initialize(SrsFileStream* fs);
+    virtual int initialize(SrsFileReader* fs);
 public:
 public:
     virtual int read_header(char header[9]);
     virtual int read_header(char header[9]);
     virtual int read_tag_header(char* ptype, int32_t* pdata_size, u_int32_t* ptime);
     virtual int read_tag_header(char* ptype, int32_t* pdata_size, u_int32_t* ptime);

@@ -461,52 +461,34 @@ int64_t srs_get_nrecv_bytes(srs_rtmp_t rtmp)
 
 
 struct FlvContext
 struct FlvContext
 {
 {
-    SrsFileStream fs;
+    SrsFileReader reader;
+    SrsFileWriter writer;
     SrsFlvEncoder enc;
     SrsFlvEncoder enc;
     SrsFlvDecoder dec;
     SrsFlvDecoder dec;
 };
 };
 
 
-srs_flv_t srs_flv_open_read(const char* file)
+srs_flv_t srs_flv_open(const char* file)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
     FlvContext* flv = new FlvContext();
     FlvContext* flv = new FlvContext();
     
     
-    if ((ret = flv->fs.open_read(file)) != ERROR_SUCCESS) {
+    if ((ret = flv->reader.open(file)) != ERROR_SUCCESS) {
         srs_freep(flv);
         srs_freep(flv);
         return NULL;
         return NULL;
     }
     }
     
     
-    if ((ret = flv->enc.initialize(&flv->fs)) != ERROR_SUCCESS) {
+    if ((ret = flv->dec.initialize(&flv->reader)) != ERROR_SUCCESS) {
         srs_freep(flv);
         srs_freep(flv);
         return NULL;
         return NULL;
     }
     }
     
     
-    if ((ret = flv->dec.initialize(&flv->fs)) != ERROR_SUCCESS) {
+    if ((ret = flv->writer.open(file)) != ERROR_SUCCESS) {
         srs_freep(flv);
         srs_freep(flv);
         return NULL;
         return NULL;
     }
     }
     
     
-    return flv;
-}
-
-srs_flv_t srs_flv_open_write(const char* file)
-{
-    int ret = ERROR_SUCCESS;
-    
-    FlvContext* flv = new FlvContext();
-    
-    if ((ret = flv->fs.open_write(file)) != ERROR_SUCCESS) {
-        srs_freep(flv);
-        return NULL;
-    }
-    
-    if ((ret = flv->enc.initialize(&flv->fs)) != ERROR_SUCCESS) {
-        srs_freep(flv);
-        return NULL;
-    }
-    
-    if ((ret = flv->dec.initialize(&flv->fs)) != ERROR_SUCCESS) {
+    if ((ret = flv->enc.initialize(&flv->writer)) != ERROR_SUCCESS) {
         srs_freep(flv);
         srs_freep(flv);
         return NULL;
         return NULL;
     }
     }
@@ -602,13 +584,13 @@ int srs_flv_size_tag(int data_size)
 int64_t srs_flv_tellg(srs_flv_t flv)
 int64_t srs_flv_tellg(srs_flv_t flv)
 {
 {
     FlvContext* context = (FlvContext*)flv;
     FlvContext* context = (FlvContext*)flv;
-    return context->fs.tellg();
+    return context->reader.tellg();
 }
 }
 
 
 void srs_flv_lseek(srs_flv_t flv, int64_t offset)
 void srs_flv_lseek(srs_flv_t flv, int64_t offset)
 {
 {
     FlvContext* context = (FlvContext*)flv;
     FlvContext* context = (FlvContext*)flv;
-    context->fs.lseek(offset);
+    context->reader.lseek(offset);
 }
 }
 
 
 flv_bool srs_flv_is_eof(int error_code)
 flv_bool srs_flv_is_eof(int error_code)

@@ -165,8 +165,7 @@ int64_t srs_get_nrecv_bytes(srs_rtmp_t rtmp);
 */
 */
 typedef void* srs_flv_t;
 typedef void* srs_flv_t;
 typedef int flv_bool;
 typedef int flv_bool;
-srs_flv_t srs_flv_open_read(const char* file);
-srs_flv_t srs_flv_open_write(const char* file);
+srs_flv_t srs_flv_open(const char* file);
 void srs_flv_close(srs_flv_t flv);
 void srs_flv_close(srs_flv_t flv);
 /* read the flv header. 9bytes header. drop the 4bytes zero previous tag size */
 /* read the flv header. 9bytes header. drop the 4bytes zero previous tag size */
 int srs_flv_read_header(srs_flv_t flv, char header[9]);
 int srs_flv_read_header(srs_flv_t flv, char header[9]);

@@ -25,6 +25,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 using namespace std;
 using namespace std;
 
 
 #include <srs_kernel_error.hpp>
 #include <srs_kernel_error.hpp>
+#include <srs_kernel_codec.hpp>
 
 
 VOID TEST(KernelCodecTest, IsKeyFrame)
 VOID TEST(KernelCodecTest, IsKeyFrame)
 {
 {

@@ -30,6 +30,28 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_utest.hpp>
 #include <srs_utest.hpp>
 
 
 #include <string>
 #include <string>
-#include <srs_kernel_codec.hpp>
+#include <srs_kernel_flv.hpp>
+
+/*
+class MockSrsFileStream : public SrsFileStream
+{
+public:
+    MockSrsFileStream();
+    virtual ~MockSrsFileStream();
+public:
+public:
+    virtual int open_write(std::string file);
+    virtual int open_read(std::string file);
+    virtual void close();
+    virtual bool is_open();
+public:
+    virtual int read(void* buf, size_t count, ssize_t* pnread);
+    virtual int write(void* buf, size_t count, ssize_t* pnwrite);
+    virtual int64_t tellg();
+    virtual int64_t lseek(int64_t offset);
+    virtual int64_t filesize();
+    virtual void skip(int64_t size);
+};
+*/
 
 
 #endif
 #endif