Handle gsf_input_seek and gsf_output_seek by hand.

svn path=/trunk/gsf-sharp/; revision=34954

gsf/Gsf.metadata

@@ -4,10 +4,12 @@
   <attr path="/api/namespace/object[@cname='GsfInput']/method[@name='Remaining']" name="name">GetRemaining</attr>
   <attr path="/api/namespace/object[@cname='GsfInput']/method[@name='Eof']" name="name">GetEof</attr>
   <attr path="/api/namespace/object[@cname='GsfInput']/method[@name='Name']" name="name">GetName</attr>
+  <attr path="/api/namespace/object[@cname='GsfInput']/method[@name='Read']" name="hidden">1</attr>
+  <attr path="/api/namespace/object[@cname='GsfInput']/method[@name='Seek']" name="hidden">1</attr>
   <attr path="/api/namespace/object[@cname='GsfOutput']/method[@name='Size']" name="name">GetSize</attr>
   <attr path="/api/namespace/object[@cname='GsfOutput']/method[@name='IsClosed']" name="name">GetIsClosed</attr>
   <attr path="/api/namespace/object[@cname='GsfOutput']/method[@name='Name']" name="name">GetName</attr>
-  <attr path="/api/namespace/object[@cname='GsfOutput']/method[@name='Read']" name="hidden">1</attr>
+  <attr path="/api/namespace/object[@cname='GsfOutput']/method[@name='Seek']" name="hidden">1</attr>
   <attr path="/api/namespace/object[@cname='GsfDocMetaData']" name="hidden">1</attr>
   <attr path="/api/namespace/object[@cname='GsfOutfileMSOle']/method[@name='SetClassId']/*/*[@name='clsid']" name="array">1</attr>
 </metadata>

gsf/Input.custom

@@ -11,3 +11,26 @@
 			System.Runtime.InteropServices.Marshal.Copy (raw_ret, ret, 0, num_bytes);
 			return ret;
 		}
+
+		[DllImport("libgsf-1-1.dll")]
+		static extern bool gsf_input_seek(IntPtr raw, long offset, int whence);
+
+		public bool Seek(long offset, System.IO.SeekOrigin origin) {
+			int whence;
+			switch (origin) {
+			case System.IO.SeekOrigin.Begin:
+				whence = 1;
+				break;
+			case System.IO.SeekOrigin.Current:
+				whence = 0;
+				break;
+			case System.IO.SeekOrigin.End:
+				whence = 2;
+				break;
+			default:
+				return true;
+			}
+			bool raw_ret = gsf_input_seek(Handle, offset, whence);
+			bool ret = raw_ret;
+			return ret;
+		}

gsf/Output.custom

@@ -0,0 +1,23 @@
+
+		[DllImport("libgsf-1-1.dll")]
+		static extern bool gsf_output_seek(IntPtr raw, long offset, int whence);
+
+		public bool Seek(long offset, System.IO.SeekOrigin origin) {
+			int whence;
+			switch (origin) {
+			case System.IO.SeekOrigin.Begin:
+				whence = 1;
+				break;
+			case System.IO.SeekOrigin.Current:
+				whence = 0;
+				break;
+			case System.IO.SeekOrigin.End:
+				whence = 2;
+				break;
+			default:
+				return true;
+			}
+			bool raw_ret = gsf_output_seek(Handle, offset, whence);
+			bool ret = raw_ret;
+			return ret;
+		}

gsf/makefile.am

@@ -20,7 +20,7 @@ gsf-api.xml:
 	chmod u+w gsf-api.xml
 	$(GAPI_FIXUP) --api=gsf-api.xml --metadata=$(srcdir)/Gsf.metadata
 
-generated-stamp: $(APIS) $(sources) Gsf.metadata Global.custom Input.custom
+generated-stamp: $(APIS) $(sources) Gsf.metadata Global.custom Input.custom Output.custom
 	$(GAPI_CODEGEN) --generate $(APIS) \
 	--outdir=generated --customdir=. --assembly-name=gsf-sharp && touch generated-stamp