Add commas to top display, and adjust memory units to megabytes if >10G RAM.

lib/lib.c

@@ -1148,18 +1148,33 @@ match:
 }
 
 // display first "dgt" many digits of number plus unit (kilo-exabytes)
-int human_readable_long(char *buf, unsigned long long num, int dgt, int style)
+int human_readable_long(char *buf, unsigned long long num, int dgt, int unit,
+  int style)
 {
   unsigned long long snap = 0;
-  int len, unit, divisor = (style&HR_1000) ? 1000 : 1024;
+  int len, commas = 0, off, ii, divisor = (style&HR_1000) ? 1000 : 1024;
 
   // Divide rounding up until we have 3 or fewer digits. Since the part we
   // print is decimal, the test is 999 even when we divide by 1024.
-  // We can't run out of units because 1<<64 is 18 exabytes.
-  for (unit = 0; snprintf(0, 0, "%llu", num)>dgt; unit++)
+  // The largest unit we can detect is 1<<64 = 18 Exabytes, but we added
+  // Zettabyte and Yottabyte in case "unit" starts above zero.
+  for (;;unit++) {
+    len = snprintf(0, 0, "%llu", num);
+    if (style&HR_COMMAS) commas = (len>4)*((len-1)/3);
+    if (len<=(dgt-commas)) break;
     num = ((snap = num)+(divisor/2))/divisor;
+  }
+  if (CFG_TOYBOX_DEBUG && unit>8) return sprintf(buf, "%.*s", dgt, "TILT");
+
   len = sprintf(buf, "%llu", num);
-  if (unit && len == 1) {
+  if (commas) {
+    for (ii = 0; ii<commas; ii++) {
+      off = len-3*(ii+1);
+      memmove(buf+off+commas-ii, buf+off, 3);
+      buf[off+commas-ii-1] = ',';
+    }
+    len += commas;
+  } else if (unit && len == 1) {
     // Redo rounding for 1.2M case, this works with and without HR_1000.
     num = snap/divisor;
     snap -= num*divisor;
@@ -1169,7 +1184,7 @@ int human_readable_long(char *buf, unsigned long long num, int dgt, int style)
   }
   if (style & HR_SPACE) buf[len++] = ' ';
   if (unit) {
-    unit = " kMGTPE"[unit];
+    unit = " kMGTPEZY"[unit];
 
     if (!(style&HR_1000)) unit = toupper(unit);
     buf[len++] = unit;
@@ -1182,7 +1197,7 @@ int human_readable_long(char *buf, unsigned long long num, int dgt, int style)
 // Give 3 digit estimate + units ala 999M or 1.7T
 int human_readable(char *buf, unsigned long long num, int style)
 {
-  return human_readable_long(buf, num, 3, style);
+  return human_readable_long(buf, num, 3, 0, style);
 }
 
 // The qsort man page says you can use alphasort, the posix committee

lib/lib.h

@@ -275,10 +275,12 @@ unsigned tar_cksum(void *data);
 int is_tar_header(void *pkt);
 char *elf_arch_name(int type);
 
-#define HR_SPACE 1 // Space between number and units
-#define HR_B     2 // Use "B" for single byte units
-#define HR_1000  4 // Use decimal instead of binary units
-int human_readable_long(char *buf, unsigned long long num, int dgt, int style);
+#define HR_SPACE  1 // Space between number and units
+#define HR_B      2 // Use "B" for single byte units
+#define HR_1000   4 // Use decimal instead of binary units
+#define HR_COMMAS 8 // Commas every 1000
+int human_readable_long(char *buf, unsigned long long num, int dgt, int unit,
+  int style);
 int human_readable(char *buf, unsigned long long num, int style);
 
 // env.c

toys/example/demo_number.c

@@ -2,14 +2,17 @@
  *
  * Copyright 2015 Rob Landley <rob@landley.net>
 
-USE_DEMO_NUMBER(NEWTOY(demo_number, "D#=3<3hdbs", TOYFLAG_BIN))
+USE_DEMO_NUMBER(NEWTOY(demo_number, "D#=3<3M#<0hcdbs", TOYFLAG_BIN))
 
 config DEMO_NUMBER
   bool "demo_number"
   default n
   help
-    usage: demo_number [-hsbi] NUMBER...
+    usage: demo_number [-hsbi] [-D LEN] NUMBER...
 
+    -D	output field is LEN chars
+    -M	input units (index into bkmgtpe)
+    -c	Comma comma down do be do down down
     -b	Use "B" for single byte units (HR_B)
     -d	Decimal units
     -h	Human readable
@@ -20,7 +23,7 @@ config DEMO_NUMBER
 #include "toys.h"
 
 GLOBALS(
-  long D;
+  long M, D;
 )
 
 void demo_number_main(void)
@@ -31,7 +34,7 @@ void demo_number_main(void)
     long long ll = atolx(*arg);
 
     if (toys.optflags) {
-      human_readable_long(toybuf, ll, TT.D, toys.optflags);
+      human_readable_long(toybuf, ll, TT.D, TT.M, toys.optflags);
       xputs(toybuf);
     } else printf("%lld\n", ll);
   }

toys/posix/ps.c

@@ -600,7 +600,7 @@ static char *string_field(struct procpid *tb, struct ofields *field)
     }
     if (which <= PS_SHR) ll *= sysconf(_SC_PAGESIZE);
     if (TT.forcek) sprintf(out, "%lldk", ll/1024);
-    else human_readable_long(s, ll, i-1, 0);
+    else human_readable_long(s, ll, i-1, 0, 0);
 
   // Posix doesn't specify what flags should say. Man page says
   // 1 for PF_FORKNOEXEC and 4 for PF_SUPERPRIV from linux/sched.h
@@ -1568,7 +1568,7 @@ static void top_common(
           char hr[4][32];
           long long ll, up = 0;
           long run[6];
-          int j;
+          int j, k;
 
           // Count running, sleeping, stopped, zombie processes.
           // The kernel has more states (and different sets in different
@@ -1590,19 +1590,19 @@ static void top_common(
               j = i%3;
               pos = strafter(toybuf+256, (char *[]){"MemTotal:","\nMemFree:",
                     "\nBuffers:","\nSwapTotal:","\nSwapFree:","\nCached:"}[i]);
-              human_readable_long(hr[j+!!j], 1024*(run[i] = pos?atol(pos):0),
-                8, 0);
-              if (j==1) human_readable_long(hr[1], 1024*(run[i-1]-run[i]), 8,0);
+              run[i] = pos ? atol(pos) : 0;
+              k = (*run>=10000000);
+              human_readable_long(hr[j+!!j], run[i]>>(10*k), 8, k+1, HR_COMMAS);
+              if (j==1) human_readable_long(hr[1], (run[i-1]-run[i])>>(10*k),
+                8, k+1, HR_COMMAS);
               else if (j==2) {
-                sprintf(toybuf, (i<3)
-                  ? "  Mem: %9s total, %9s used, %9s free, %9s buffers"
-                  : " Swap: %9s total, %9s used, %9s free, %9s cached",
-                  hr[0], hr[1], hr[2], hr[3]);
+                sprintf(toybuf, " %s: %9s total, %9s used, %9s free, %9s %s",
+                  (i<3) ? " Mem" : "Swap", hr[0], hr[1], hr[2], hr[3],
+                  (i<3) ? "buffers" : "cached");
                 lines = header_line(lines, 0);
               }
             }
           }
-
           pos = toybuf;
           i = sysconf(_SC_NPROCESSORS_CONF);
           pos += sprintf(pos, "%d%%cpu", i*100);