USB Port transport add-on contributed by Andreas Benzler

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3739 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/print/transports/usb_port/Jamfile

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+SubDir OBOS_TOP src add-ons print transports usb_port ;
+
+SubDirHdrs [ FDirName $(OBOS_TOP) src add-ons print transports shared ] ;
+
+UsePrivateHeaders interface print ;
+
+Addon USB\ Port : print transport : 
+	print_transport.cpp
+;
+
+LinkSharedOSLibs USB\ Port : be libtransportaddon.a ;
+

src/add-ons/print/transports/usb_port/print_transport.cpp

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+/*****************************************************************************/
+// Usb port transport add-on,
+// changes by Andreas Benzler
+//
+// Original from Parallel 
+// port transport add-on.
+//
+// Author
+//   Michael Pfeiffer
+// 
+// This application and all source files used in its construction, except 
+// where noted, are licensed under the MIT License, and have been written 
+// and are:
+//
+// Copyright (c) 2001-2003 OpenBeOS Project
+//
+// 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 <unistd.h>
+#include <stdio.h>
+
+#include <StorageKit.h>
+#include <SupportKit.h>
+
+#include "TransportAddOn.h"
+
+class UsbPort : public BDataIO {	
+	public:
+		UsbPort(BDirectory* printer, BMessage* msg);
+		~UsbPort();
+
+		bool IsOk() { return fFile > -1; }
+
+		ssize_t Read(void* buffer, size_t size);
+		ssize_t Write(const void* buffer, size_t size);
+
+	private:
+		int fFile;
+};
+
+
+// Implementation of transport add-on interface
+
+BDataIO* instanciate_transport(BDirectory* printer, BMessage* msg) {
+	UsbPort* transport = new UsbPort(printer, msg);
+	if (transport->IsOk()) {
+		return transport;
+	} else {
+		delete transport; return NULL;
+	}
+}
+
+
+// Implementation of UsbPort
+
+UsbPort::UsbPort(BDirectory* printer, BMessage *msg) 
+	: fFile(-1)
+{
+	// We support only one USB printer, so does BeOS R5.
+	fFile = open("/dev/printer/usb/0", O_RDWR | O_EXCL | O_BINARY, 0);
+}
+
+
+UsbPort::~UsbPort()
+{
+	if (IsOk()) {
+		close(fFile);
+		fFile = -1;
+	}
+}
+
+
+ssize_t
+UsbPort::Read(void* buffer, size_t size)
+{
+	return read(fFile, buffer, size);
+}
+
+
+ssize_t
+UsbPort::Write(const void* buffer, size_t size)
+{
+	return write(fFile, buffer, size);
+}
+