Make certain functions pure virtual so I won't forget to implement them

[libs/core.git] / source / io / zlibcompressed.cpp

diff --git a/source/io/zlibcompressed.cpp b/source/io/zlibcompressed.cpp
index ea5e8030142f5fcfb90b72171b268ed1cdba3b7b..99ae7f81f8845016e73e92d60f13083e7e672ee6 100644 (file)
--- a/source/io/zlibcompressed.cpp
+++ b/source/io/zlibcompressed.cpp
@@ -38,17 +38,32 @@ ZlibCompressed::Private::Private()
 
 
 ZlibCompressed::ZlibCompressed(Base &b, unsigned level):
-       below(b),
-       buffer_size(1024),
-       in_buffer(0),
-       out_buffer(0),
-       priv(0)
+       below(b)
 {
-#ifdef WITH_ZLIB
        mode = below.get_mode()&M_RDWR;
        if(mode!=M_READ && mode!=M_WRITE)
                throw invalid_access(mode);
 
+       init(level);
+}
+
+ZlibCompressed::ZlibCompressed(Base &b, Mode m, unsigned level):
+       below(b)
+{
+       mode = m&below.get_mode()&M_RDWR;
+       if(mode!=M_READ && mode!=M_WRITE)
+               throw invalid_access(m);
+
+       init(level);
+}
+
+void ZlibCompressed::init(unsigned level)
+{
+#ifdef WITH_ZLIB
+       buffer_size = 1024;
+       in_buffer = 0;
+       out_buffer = 0;
+       stream_end = false;
        priv = new Private;
 
        if(mode==M_WRITE)
@@ -74,6 +89,8 @@ ZlibCompressed::ZlibCompressed(Base &b, unsigned level):
 
        below.signal_flush_required.connect(sigc::mem_fun(this, &ZlibCompressed::flush));
 #else
+       (void)buffer_size;
+       (void)stream_end;
        (void)level;
        throw zlib_error("unsupported", -1);
 #endif
@@ -96,6 +113,11 @@ ZlibCompressed::~ZlibCompressed()
        delete priv;
 }
 
+void ZlibCompressed::set_block(bool)
+{
+       throw logic_error("ZlibCompressed::set_block");
+}
+
 void ZlibCompressed::flush()
 {
 #ifdef WITH_ZLIB
@@ -219,7 +241,7 @@ unsigned ZlibCompressed::do_read(char *data, unsigned size)
                {
                        int ret = inflate(&priv->stream, Z_NO_FLUSH);
                        if(ret==Z_STREAM_END)
-                               set_eof();
+                               stream_end = true;
                        else if(ret!=Z_OK)
                                throw zlib_error("inflate", ret);
                        need_more_input = (priv->stream.next_out==out_buffer);
@@ -227,7 +249,7 @@ unsigned ZlibCompressed::do_read(char *data, unsigned size)
 
                if(need_more_input)
                {
-                       if(eof_flag)
+                       if(stream_end)
                                break;
 
                        if(priv->stream.next_in>in_buffer)
@@ -237,9 +259,12 @@ unsigned ZlibCompressed::do_read(char *data, unsigned size)
                        unsigned len = below.read(reinterpret_cast<char *>(priv->stream.next_in), in_buffer+buffer_size-priv->stream.next_in);
                        priv->stream.avail_in += len;
                        if(!len && below.eof())
-                               set_eof();
+                               stream_end = true;
                }
        }
+
+       if(size>0 && processed==0 && stream_end)
+               set_eof();
 #else
        (void)data;
        (void)size;
@@ -248,5 +273,10 @@ unsigned ZlibCompressed::do_read(char *data, unsigned size)
        return processed;
 }
 
+const Handle &ZlibCompressed::get_handle(Mode)
+{
+       throw logic_error("ZlibCompressed::get_handle");
+}
+
 } // namespace IO
 } // namespace Msp