top: refined memory graphs two abreast summary display <=== port of newlib 5c5bff39

______________________________ original newlib message

When more than two cpus are displayed per summary area
line in graph form, those memory graphs were scaled to
that same width for consistency & aesthetics. However,
they probably shouldn't have been reduced to less than
terminal width due to a resulting loss of information.

[ after all, detailed memory stats are never reduced ]

So now, supporting logic was refactored to behave just
as it did before the 4 toggle was expanded beyond '1'.

[ the changes impact the 2 memory graphs exclusively ]

Reference(s):
https://www.freelists.org/post/procps/top-enhancements-2-bugs-swatted,1

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

2 files changed, 57 insertions, 43 deletions

diff --git a/top/top.c b/top/top.c
index 1cfb318..08e1c80 100644
--- a/top/top.c
+++ b/top/top.c
@@ -258,8 +258,14 @@ static int Numa_node_sel = -1;
 #define GRAPH_prefix_std   25  // '%Cpunnn: 100.0/100.0 100[' or 'nnn-nnn: 100.0/100.0 100['
 #define GRAPH_prefix_abv   12  // '%Cpunnn:100[' or 'nnn-nnn:100[' or 'GiB Mem 100[' or 'GiB Swap 99['
 #define GRAPH_suffix        2  // '] ' (bracket + trailing space)
-static float Graph_adj;        // bars/blocks scaling factor
-static int   Graph_len;        // scaled length (<= GRAPH_length_max)
+        // first 3 more static (adj_geometry), last 3 volatile (sum_tics/do_memory)
+struct graph_parms {
+   float adjust;               // bars/blocks scaling factor
+   int   length;               // scaled length (<= GRAPH_length_max)
+   int   style;                // rc.graph_cpus or rc.graph_mems
+   long  total, part1, part2;  // elements to be graphed
+};
+static struct graph_parms *Graph_cpus, *Graph_mems;
 static const char Graph_blks[] = "                                                                                                    ";
 static const char Graph_bars[] = "||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||";
 
@@ -2142,15 +2148,23 @@ static void adj_geometry (void) {
    if (Curwin->rc.double_up) {
       int num = (Curwin->rc.double_up + 1);
       int pfx = (Curwin->rc.double_up < 2) ? GRAPH_prefix_std : GRAPH_prefix_abv;
-      Graph_len =  (Screen_cols - (ADJOIN_space * Curwin->rc.double_up) - (num * (pfx + GRAPH_suffix))) / num;
+      Graph_cpus->length = (Screen_cols - (ADJOIN_space * Curwin->rc.double_up) - (num * (pfx + GRAPH_suffix))) / num;
+      Graph_mems->length = (Screen_cols - ADJOIN_space - (2 * (GRAPH_prefix_std + GRAPH_suffix))) / 2;
    } else {
-      Graph_len = Screen_cols - (GRAPH_prefix_std + GRAPH_length_max + GRAPH_suffix);
-      if (Graph_len >= 0) Graph_len = GRAPH_length_max;
-      else Graph_len = Screen_cols - GRAPH_prefix_std - GRAPH_suffix;
+      Graph_cpus->length = Screen_cols - (GRAPH_prefix_std + GRAPH_length_max + GRAPH_suffix);
+      if (Graph_cpus->length >= 0) Graph_cpus->length = GRAPH_length_max;
+      else Graph_cpus->length = Screen_cols - GRAPH_prefix_std - GRAPH_suffix;
+      Graph_mems->length = Graph_cpus->length;
    }
-   if (Graph_len < GRAPH_length_min) Graph_len = GRAPH_length_min;
-   if (Graph_len > GRAPH_length_max) Graph_len = GRAPH_length_max;
-   Graph_adj = (float)Graph_len / 100.0;
+   if (Graph_cpus->length < GRAPH_length_min) Graph_cpus->length = GRAPH_length_min;
+   if (Graph_cpus->length > GRAPH_length_max) Graph_cpus->length = GRAPH_length_max;
+   Graph_cpus->adjust = (float)Graph_cpus->length / 100.0;
+   Graph_cpus->style  = Curwin->rc.graph_cpus;
+
+   if (Graph_mems->length < GRAPH_length_min) Graph_mems->length = GRAPH_length_min;
+   if (Graph_mems->length > GRAPH_length_max) Graph_mems->length = GRAPH_length_max;
+   Graph_mems->adjust = (float)Graph_mems->length / 100.0;
+   Graph_mems->style  = Curwin->rc.graph_mems;
 
    fflush(stdout);
 } // end: adj_geometry
@@ -3879,6 +3893,9 @@ static void before (char *me) {
    memcpy(HHash_one, HHash_nul, sizeof(HHash_nul));
    memcpy(HHash_two, HHash_nul, sizeof(HHash_nul));
 #endif
+   // lastly, establish support for graphing cpus & memory
+   Graph_cpus = alloc_c(sizeof(struct graph_parms));
+   Graph_mems = alloc_c(sizeof(struct graph_parms));
 } // end: before
 
 
@@ -6265,7 +6282,7 @@ struct rx_st {
          * A *Helper* function to produce the actual cpu & memory graphs for |
          * these functions -- sum_tics (tertiary) and do_memory (secondary). |
          * (sorry about the name, but it keeps the above comment commitment) | */
-static struct rx_st *sum_rx (long total, long part1, long part2, int style) {
+static struct rx_st *sum_rx (struct graph_parms *these) {
    static struct {
       const char *part1, *part2, *style;
    } gtab[] = {
@@ -6274,30 +6291,30 @@ static struct rx_st *sum_rx (long total, long part1, long part2, int style) {
    };
    static __thread struct rx_st rx;
    char buf1[SMLBUFSIZ], buf2[SMLBUFSIZ], buf3[MEDBUFSIZ];
-   int num1, num2, width;
+   int ix, num1, num2, width;
    float scale;
 
-   scale = 100.0 / total;
-   rx.pcnt_one = scale * part1;
-   rx.pcnt_two = scale * part2;
+   scale = 100.0 / these->total;
+   rx.pcnt_one = scale * these->part1;
+   rx.pcnt_two = scale * these->part2;
    if (rx.pcnt_one + rx.pcnt_two > 100.0 || rx.pcnt_two < 0)
       rx.pcnt_two = 0;
    rx.pcnt_tot = rx.pcnt_one + rx.pcnt_two;
 
-   num1 = (int)((rx.pcnt_one * Graph_adj) + .5),
-   num2 = (int)((rx.pcnt_two * Graph_adj) + .5);
-   if (num1 + num2 > Graph_len)
-      num2 = Graph_len - num1;
+   num1 = (int)((rx.pcnt_one * these->adjust) + .5),
+   num2 = (int)((rx.pcnt_two * these->adjust) + .5);
+   if (num1 + num2 > these->length)
+      num2 = these->length - num1;
 
-   width = Graph_len;
+   width = these->length;
    buf1[0] = buf2[0] = buf3[0] = '\0';
-   --style;    // now relative to zero
+   ix = these->style - 1;     // now relative to zero
    if (num1) {
-      snprintf(buf1, sizeof(buf1), gtab[style].part1, num1, gtab[style].style);
+      snprintf(buf1, sizeof(buf1), gtab[ix].part1, num1, gtab[ix].style);
       width += 2;
    }
    if (num2) {
-      snprintf(buf2, sizeof(buf2), gtab[style].part2, num2, gtab[style].style);
+      snprintf(buf2, sizeof(buf2), gtab[ix].part2, num2, gtab[ix].style);
       width += 2;
    }
    snprintf(buf3, sizeof(buf3), "%s%s", buf1, buf2);
@@ -6370,7 +6387,10 @@ static int sum_tics (CPU_t *cpu, const char *pfx, int nobuf) {
    /* display some kinda' cpu state percentages
       (who or what is explained by the passed prefix) */
    if (Curwin->rc.graph_cpus) {
-      rx = sum_rx(tot_frme, u_frme, s_frme, Curwin->rc.graph_cpus);
+      Graph_cpus->total = tot_frme;
+      Graph_cpus->part1 = u_frme;
+      Graph_cpus->part2 = s_frme;
+      rx = sum_rx(Graph_cpus);
       if (Curwin->rc.double_up > 1)
          return sum_see(fmtmk("%s~3%3.0f%s", pfx, rx->pcnt_tot, rx->graph), nobuf);
       else {
@@ -6548,29 +6568,23 @@ static void do_memory (void) {
    kb_main_my_misc = kb_main_total - kb_main_available - kb_main_used;
 #endif
    if (Curwin->rc.graph_mems) {
+      Graph_mems->total = kb_main_total;
+      Graph_mems->part1 = kb_main_used;
+      Graph_mems->part2 = kb_main_my_misc;
+      rx = sum_rx(Graph_mems);
       prT(bfT(0), mkM(total));
-      rx = sum_rx(kb_main_total, kb_main_used, kb_main_my_misc, Curwin->rc.graph_mems);
-      if (Curwin->rc.double_up > 1)
-         snprintf(row, sizeof(row), "%s %s~3%3.0f%s"
-            , scT(label), N_txt(WORD_abv_mem_txt), rx->pcnt_tot, rx->graph);
-      else {
-         prT(bfT(0), kb_main_total);
-         snprintf(row, sizeof(row), "%s %s:~3%#5.1f~2/%-9.9s~3%s"
-            , scT(label), N_txt(WORD_abv_mem_txt), rx->pcnt_tot, bfT(0)
-            , rx->graph);
-      }
+      snprintf(row, sizeof(row), "%s %s:~3%#5.1f~2/%-9.9s~3%s"
+         , scT(label), N_txt(WORD_abv_mem_txt), rx->pcnt_tot, bfT(0)
+         , rx->graph);
       Msg_row += sum_see(row, mem2UP);
 
+      Graph_mems->total = kb_swap_total;
+      Graph_mems->part1 = 0;
+      Graph_mems->part2 = kb_main_used;
+      rx = sum_rx(Graph_mems);
       prT(bfT(1), mkS(total));
-      rx = sum_rx(kb_swap_total, 0, kb_swap_used, Curwin->rc.graph_mems);
-      if (Curwin->rc.double_up > 1)
-         snprintf(row, sizeof(row), "%s %s~3%3.0f%s"
-            , scT(label), N_txt(WORD_abv_swp_txt), rx->pcnt_tot, rx->graph);
-      else {
-         prT(bfT(1), kb_swap_total);
-         snprintf(row, sizeof(row), "%s %s:~3%#5.1f~2/%-9.9s~3%s"
-            , scT(label), N_txt(WORD_abv_swp_txt), rx->pcnt_two, bfT(1), rx->graph);
-      }
+      snprintf(row, sizeof(row), "%s %s:~3%#5.1f~2/%-9.9s~3%s"
+         , scT(label), N_txt(WORD_abv_swp_txt), rx->pcnt_two, bfT(1), rx->graph);
       Msg_row += sum_see(row, 1);
 
    } else {
diff --git a/top/top.h b/top/top.h
index 2706105..c0efceb 100644
--- a/top/top.h
+++ b/top/top.h
@@ -846,7 +846,7 @@ typedef struct WIN_t {
 //atic void          keys_window (int ch);
 //atic void          keys_xtra (int ch);
 /*------  Tertiary summary display support (summary_show helpers)  -------*/
-//atic struct rx_st *sum_rx (long total, long part1, long part2, int style);
+//atic struct rx_st *sum_rx (struct graph_parms *these);
 //atic inline int    sum_see (const char *str, int nobuf);
 //atic int           sum_tics (CPU_t *cpu, const char *pfx, int nobuf);
 //atic int           sum_unify (CPU_t *cpu, int nobuf);