top: add the ability to suppress zeros in most columns

With the increased width and precision of memory and %
columns, the proliferation of 0's when there's nothing
to report seems like a distraction versus useful data.

This commit introduces the '0' toggle which can either
display or suppress those zeros. And, like the scaling
states this new state is also preserved in the rcfile.

(now that we know a '.' + 2 spaces is squeezed to one)
(everything's perfectly justified, but it's just luck)

Signed-off-by: Jim Warner <james.warner@comcast.net>

diff --git a/top/top.1 b/top/top.1
index e6ab28cd8e1e9a4e2a2b17ce0cfccd84e20869d3..c914e771f89fff9efb6622f8fed8193a29c94186 100644 (file)
--- a/top/top.1
+++ b/top/top.1
@@ -836,7 +836,7 @@ depending on the context in which they are issued.
 
 .Bd -literal
   4a.\fI Global-Commands \fR
-        <Ent/Sp> ?, =,
+        <Ent/Sp> ?, =, 0,
         A, B, d, E, g, h, H, I, k, q, r, s, W, X, Y, Z
   4b.\fI Summary-Area-Commands \fR
         C, l, t, 1, m
@@ -900,6 +900,12 @@ vertical and horizontal scrolling.
 
 When operating in \*(AM this command has a broader meaning.
 
+.TP 7
+\ \ \'\fB0\fR\' :\fIZero-Suppress\fR toggle \fR
+This command determines whether zeros are shown or suppressed for many
+of the fields in a \*(TW.
+Fields like UID, GID, NI, PR or P are not affected by this toggle.
+
 .TP 7
 \ \ \'\fBA\fR\' :\fIAlternate-Display-Mode\fR toggle \fR
 This command will switch between \*(FM and \*(AM.

diff --git a/top/top.c b/top/top.c
index 204a678307c4ce2b9117372f70915a5f280fdbef..0dadc870c7be8093a03bd1a8bb5e414ff201a46d 100644 (file)
--- a/top/top.c
+++ b/top/top.c
@@ -3113,8 +3113,8 @@ static void configs_read (void) {
       } // end: for (GROUPSMAX)
 
       // any new addition(s) last, for older rcfiles compatibility...
-      fscanf(fp, "Fixed_widest=%d, Summ_mscale=%d, Task_mscale=%d\n"
-         , &Rc.fixed_widest, &Rc.summ_mscale, &Rc.task_mscale);
+      fscanf(fp, "Fixed_widest=%d, Summ_mscale=%d, Task_mscale=%d, Zero_suppress=%d\n"
+         , &Rc.fixed_widest, &Rc.summ_mscale, &Rc.task_mscale, &Rc.zero_suppress);
 
 try_inspect_entries:
 
@@ -3702,8 +3702,8 @@ static void file_writerc (void) {
    }
 
    // any new addition(s) last, for older rcfiles compatibility...
-   fprintf(fp, "Fixed_widest=%d, Summ_mscale=%d, Task_mscale=%d\n"
-      , Rc.fixed_widest, Rc.summ_mscale, Rc.task_mscale);
+   fprintf(fp, "Fixed_widest=%d, Summ_mscale=%d, Task_mscale=%d, Zero_suppress=%d\n"
+      , Rc.fixed_widest, Rc.summ_mscale, Rc.task_mscale, Rc.zero_suppress);
 
    if (Inspect.raw)
       fputs(Inspect.raw, fp);
@@ -3901,6 +3901,9 @@ static void keys_global (int ch) {
       case 'Z':
          wins_colors();
          break;
+      case '0':
+         Rc.zero_suppress = !Rc.zero_suppress;
+         break;
       case kbd_ENTER:        // these two have the effect of waking us
       case kbd_SPACE:        // from 'select()', updating hotplugged
          sysinfo_refresh(1); // resources and refreshing the display
@@ -4364,7 +4367,7 @@ static void do_key (int ch) {
    } key_tab[] = {
       { keys_global,
          { '?', 'B', 'd', 'E', 'e', 'F', 'f', 'g', 'H', 'h'
-         , 'I', 'k', 'r', 's', 'X', 'Y', 'Z'
+         , 'I', 'k', 'r', 's', 'X', 'Y', 'Z', '0'
          , kbd_ENTER, kbd_SPACE, '\0' } },
       { keys_summary,
          { '1', 'C', 'l', 'm', 't', '\0' } },