Added Be's driver_settings.h header file (hey, they don't even include any

license stuff in it :-).
Some cleanup on the other headers.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@638 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/drivers/driver_settings.h

@@ -0,0 +1,48 @@
+#ifndef _DRIVER_SETTINGS_H
+#define _DRIVER_SETTINGS_H
+
+#include <OS.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct driver_parameter {
+	char *name;
+	int	value_count;
+	char **values;
+	int parameter_count;
+	struct driver_parameter *parameters;
+} driver_parameter;
+
+typedef struct driver_settings {
+	int parameter_count;
+	struct driver_parameter *parameters;
+} driver_settings;
+
+extern void			*load_driver_settings(const char *drivername);
+extern status_t		unload_driver_settings(void *handle);
+extern const char	*get_driver_parameter(
+							void *handle,
+							const char *keyname,
+							const char *unknownvalue,	/* key not present */
+							const char *noargvalue);	/* key has no value */
+extern bool			get_driver_boolean_parameter(
+							void *handle,
+							const char *keyname,
+							bool unknownvalue,
+							bool noargvalue);
+
+extern const driver_settings   *get_driver_settings(void *handle);
+
+/* Pass this in as drivername to access safe mode settings */
+#define B_SAFEMODE_DRIVER_SETTINGS	"/safemode/"
+
+/* Pass this as the key value to check if safe mode is enabled */
+#define B_SAFEMODE_SAFE_MODE		"safemode"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* _DRIVER_SETTINGS_H */