data types: make control structure smaller

Move boolean variables, and other variables that has well known small size,
to a named bit field.

diff --git a/mtr.h b/mtr.h
index 99ebf66fb28b00f4a7f3d99841793566e80f2160..11d8a00fb6c44c1ef4edb524d9c182c441b3f4c9 100644 (file)
--- a/mtr.h
+++ b/mtr.h
@@ -81,28 +81,19 @@ extern char *
 trim(char * s);
 
 struct mtr_ctl {
-  int DisplayMode;
-  int display_mode;
-  int Interactive;
   int MaxPing;
-  int ForceMaxPing;
   float WaitTime;
   float GraceTime;
   char *Hostname;
   char *InterfaceAddress;
   char LocalHostname[128];
-  int dns;
-  int use_dns;
-  int show_ips;
   int ipinfo_no;
-  int enablempls;
   int cpacketsize;             /* packet size used by ping */
   int bitpattern;              /* packet bit pattern used by ping */
   int tos;                     /* type of service set in ping packet*/
 #ifdef SO_MARK
   uint32_t mark;
 #endif
-  int reportwide;
   int af;                      /* address family of remote target */
   int mtrtype;                 /* type of query packet used */
   int fstTTL;                  /* initial hub(ttl) to ping byMin */
@@ -115,6 +106,16 @@ struct mtr_ctl {
   int fld_index[256];          /* default display field (defined by key in net.h) and order */
   char available_options[MAXFLD];
   void *gtk_data;              /* pointer to hold arbitrary gtk data */
+  unsigned int                 /* bit field to hold named booleans */
+    ForceMaxPing:1,
+    use_dns:1,
+    show_ips:1,
+    enablempls:1,
+    dns:1,
+    reportwide:1,
+    Interactive:1,
+    display_mode:2,
+    DisplayMode:5;
 };
 
 #endif /* MTR_MTR_H */