1 files changed, 75 insertions, 0 deletions
diff --git a/viengoos/output.h b/viengoos/output.h
new file mode 100644
index 0000000..922ad28
--- /dev/null
+++ b/viengoos/output.h
@@ -0,0 +1,75 @@
+/* output.h - Output routines interfaces.
+   Copyright (C) 2003, 2007 Free Software Foundation, Inc.
+   Written by Marcus Brinkmann.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#ifndef _OUTPUT_H
+#define _OUTPUT_H	1
+
+
+/* Every architecture must define at least one output driver, but might
+   define several.  For each output driver, the name and operations on
+   the driver must be provided in the following structure.  */
+
+struct output_driver
+{
+  const char *name;
+
+  /* Initialize the output device.  */
+  void (*init) (const char *cfg);
+
+  /* Deinitialize the output device.  */
+  void (*deinit) (void);
+
+  /* Output a character.  */
+  void (*putchar) (int chr);
+};
+
+
+/* Every architecture must provide a list of all output drivers,
+   terminated by a driver structure which has a null pointer as its
+   name.  */
+extern struct output_driver *output_drivers[];
+
+
+#include <stdarg.h>
+
+/* Activate the output driver DRIVER or the default one if DRIVER is a
+   null pointer.  Must be called once at startup, before calling
+   putchar or any other output routine.  DRIVER has the pattern
+   NAME[,CONFIG...], for example "serial,uart2,speed=9600".  Returns 0
+   if DRIVER is not a valid output driver specification, otherwise 1
+   on success.  */
+int output_init (const char *driver);
+
+
+/* Deactivate the output driver.  Must be called after the last time
+   putchar or any other output routine is called.  */
+void output_deinit (void);
+
+
+/* Print the single character CHR on the output device.  */
+int putchar (int chr);
+
+int puts (const char *str);
+
+int vprintf (const char *fmt, va_list ap);
+
+int printf (const char *fmt, ...);
+
+#endif	/* _OUTPUT_H */