Silence top(1) compiler warnings

The contrib/top code is no longer maintained upstream (last pulled 16 years
ago). The K&R-style followed by the code spews -Wimplicit-int and -Wreturn-type
warnings, amongst others. This silences 131 warnings with as little modification
as possible by adding necessary return types, definitions, headers, and header
guards, and missing header includes.

The 5 warnings that remain are due to undeclared ncurses references. I didn't
include curses.h and term.h because there are several local functions and macros
that conflict with those definitions.

MFC after: 3 weeks
Reviewed by: cem, ngie
Submitted by: Randy Westlund <rwestlun@gmail.com>
Differential Revision: https://reviews.freebsd.org/D6468

1 files changed, 34 insertions, 0 deletions

diff --git a/contrib/top/display.h b/contrib/top/display.h
index 4bd7ce7..5d5a07a 100644
--- a/contrib/top/display.h
+++ b/contrib/top/display.h
@@ -5,3 +5,37 @@
 #define  MT_standout  1
 #define  MT_delayed   2
 
+#include "machine.h"
+
+int		 display_updatecpus(struct statics *statics);
+void	 clear_message(void);
+int		 display_resize(void);
+void	 i_header(char *text);
+char	*printable(char *string);
+char	*cpustates_tag(void);
+void	 display_header(int t);
+int		 display_init(struct statics *statics);
+void	 i_arc(int *stats);
+void	 i_cpustates(int *states);
+void	 i_loadave(int mpid, double *avenrun);
+void	 i_memory(int *stats);
+void	 i_message(void);
+void	 i_process(int line, char *thisline);
+void	 i_procstates(int total, int *brkdn);
+void	 i_swap(int *stats);
+void	 i_timeofday(time_t *tod);
+void	 i_uptime(struct timeval *bt, time_t *tod);
+void	 new_message();
+int		 readline(char *buffer, int size, int numeric);
+char	*trim_header(char *text);
+void	 u_arc(int *stats);
+void	 u_cpustates(int *states);
+void	 u_endscreen(int hi);
+void	 u_header(char *text);
+void	 u_loadave(int mpid, double *avenrun);
+void	 u_memory(int *stats);
+void	 u_message(void);
+void	 u_process(int line, char *newline);
+void	 u_procstates(int total, int *brkdn);
+void	 u_swap(int *stats);
+void	 z_cpustates(void);