GCOV: add -j argument (human readable format).

2017-10-31  Martin Liska  <mliska@suse.cz>

	* doc/gcov.texi: Document new option.
	* gcov.c (print_usage): Likewise print it.
	(process_args): Support the argument.
	(format_count): New function.
	(format_gcov): Use the function.
2017-10-31  Martin Liska  <mliska@suse.cz>

	* g++.dg/gcov/loop.C: New test.
	* lib/gcov.exp: Support human readable format for counts.

From-SVN: r254269

1 files changed, 38 insertions, 2 deletions

diff --git a/gcc/gcov.c b/gcc/gcov.c
index f1e7777..48bcdc0 100644
--- a/gcc/gcov.c
+++ b/gcc/gcov.c
@@ -431,6 +431,10 @@ static int flag_use_colors = 0;
 
 static int flag_all_blocks = 0;
 
+/* Output human readable numbers.  */
+
+static int flag_human_readable_numbers = 0;
+
 /* Output summary info for each function.  */
 
 static int flag_function_summary = 0;
@@ -742,6 +746,7 @@ print_usage (int error_p)
   fnotice (file, "  -f, --function-summaries        Output summaries for each function\n");
   fnotice (file, "  -h, --help                      Print this help, then exit\n");
   fnotice (file, "  -i, --intermediate-format       Output .gcov file in intermediate text format\n");
+  fnotice (file, "  -j, --human-readable            Output human readable numbers\n");
   fnotice (file, "  -k, --use-colors                Emit colored output\n");
   fnotice (file, "  -l, --long-file-names           Use long output file names for included\n\
                                     source files\n");
@@ -784,6 +789,7 @@ static const struct option options[] =
   { "branch-probabilities", no_argument,       NULL, 'b' },
   { "branch-counts",        no_argument,       NULL, 'c' },
   { "intermediate-format",  no_argument,       NULL, 'i' },
+  { "human-readable",	    no_argument,       NULL, 'j' },
   { "no-output",            no_argument,       NULL, 'n' },
   { "long-file-names",      no_argument,       NULL, 'l' },
   { "function-summaries",   no_argument,       NULL, 'f' },
@@ -807,7 +813,7 @@ process_args (int argc, char **argv)
 {
   int opt;
 
-  const char *opts = "abcdfhiklmno:prs:uvwx";
+  const char *opts = "abcdfhijklmno:prs:uvwx";
   while ((opt = getopt_long (argc, argv, opts, options, NULL)) != -1)
     {
       switch (opt)
@@ -830,6 +836,9 @@ process_args (int argc, char **argv)
 	case 'l':
 	  flag_long_names = 1;
 	  break;
+	case 'j':
+	  flag_human_readable_numbers = 1;
+	  break;
 	case 'k':
 	  flag_use_colors = 1;
 	  break;
@@ -1914,6 +1923,33 @@ add_branch_counts (coverage_t *coverage, const arc_t *arc)
     }
 }
 
+/* Format COUNT, if flag_human_readable_numbers is set, return it human
+   readable format.  */
+
+static char const *
+format_count (gcov_type count)
+{
+  static char buffer[64];
+  const char *units = " kMGTPEZY";
+
+  if (count < 1000 || !flag_human_readable_numbers)
+    {
+      sprintf (buffer, "%" PRId64, count);
+      return buffer;
+    }
+
+  unsigned i;
+  gcov_type divisor = 1;
+  for (i = 0; units[i+1]; i++, divisor *= 1000)
+    {
+      if (count + divisor / 2 < 1000 * divisor)
+	break;
+    }
+  gcov_type r  = (count + divisor / 2) / divisor;
+  sprintf (buffer, "%" PRId64 "%c", r, units[i]);
+  return buffer;
+}
+
 /* Format a GCOV_TYPE integer as either a percent ratio, or absolute
    count.  If dp >= 0, format TOP/BOTTOM * 100 to DP decimal places.
    If DP is zero, no decimal point is printed. Only print 100% when
@@ -1961,7 +1997,7 @@ format_gcov (gcov_type top, gcov_type bottom, int dp)
 	}
     }
   else
-    sprintf (buffer, "%" PRId64, (int64_t)top);
+    return format_count (top);
 
   return buffer;
 }