[parseopt] Add parse_timeout()

Parsing a timeout value (specified in milliseconds) into an internal
timeout value measured in timer ticks is a common operation.  Provide
a parse_timeout() value to carry out this conversion automatically.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/menu.h

@@ -43,7 +43,7 @@ extern struct menu_item * add_menu_item ( struct menu *menu, const char *label,
 					  int is_default );
 extern void destroy_menu ( struct menu *menu );
 extern struct menu * find_menu ( const char *name );
-extern int show_menu ( struct menu *menu, unsigned int timeout_ms,
+extern int show_menu ( struct menu *menu, unsigned long timeout,
 		       const char *select, struct menu_item **selected );
 
 #endif /* _IPXE_MENU_H */

src/include/ipxe/parseopt.h

@@ -126,6 +126,7 @@ struct named_setting {
 
 extern int parse_string ( char *text, char **value );
 extern int parse_integer ( char *text, unsigned int *value );
+extern int parse_timeout ( char *text, unsigned long *value );
 extern int parse_netdev ( char *text, struct net_device **netdev );
 extern int parse_menu ( char *text, struct menu **menu );
 extern int parse_flag ( char *text __unused, int *flag );

src/include/usr/pingmgmt.h

@@ -11,6 +11,6 @@ FILE_LICENCE ( GPL2_OR_LATER );
 
 #include <stdint.h>
 
-extern int ping ( const char *hostname, unsigned long timeout_ms, size_t len );
+extern int ping ( const char *hostname, unsigned long timeout, size_t len );
 
 #endif /* _USR_PINGMGMT_H */

src/include/usr/prompt.h

@@ -9,6 +9,6 @@
 
 FILE_LICENCE ( GPL2_OR_LATER );
 
-extern int prompt ( const char *text, unsigned int wait_ms, int key );
+extern int prompt ( const char *text, unsigned long timeout, int key );
 
 #endif /* _USR_PROMPT_H */