Index: icu46/source/test/perf/perldriver/Format.pm |
=================================================================== |
--- icu46/source/test/perf/perldriver/Format.pm (revision 0) |
+++ icu46/source/test/perf/perldriver/Format.pm (revision 0) |
@@ -0,0 +1,166 @@ |
+#!/usr/local/bin/perl |
+# ******************************************************************** |
+# * COPYRIGHT: |
+# * Copyright (c) 2002, International Business Machines Corporation and |
+# * others. All Rights Reserved. |
+# ******************************************************************** |
+ |
+my $PLUS_MINUS = "±"; |
+ |
+#|#--------------------------------------------------------------------- |
+#|# Format a confidence interval, as given by a Dataset. Output is as |
+#|# as follows: |
+#|# 241.23 - 241.98 => 241.5 +/- 0.3 |
+#|# 241.2 - 243.8 => 242 +/- 1 |
+#|# 211.0 - 241.0 => 226 +/- 15 or? 230 +/- 20 |
+#|# 220.3 - 234.3 => 227 +/- 7 |
+#|# 220.3 - 300.3 => 260 +/- 40 |
+#|# 220.3 - 1000 => 610 +/- 390 or? 600 +/- 400 |
+#|# 0.022 - 0.024 => 0.023 +/- 0.001 |
+#|# 0.022 - 0.032 => 0.027 +/- 0.005 |
+#|# 0.022 - 1.000 => 0.5 +/- 0.5 |
+#|# In other words, take one significant digit of the error value and |
+#|# display the mean to the same precision. |
+#|sub formatDataset { |
+#| my $ds = shift; |
+#| my $lower = $ds->getMean() - $ds->getError(); |
+#| my $upper = $ds->getMean() + $ds->getError(); |
+#| my $scale = 0; |
+#| # Find how many initial digits are the same |
+#| while ($lower < 1 || |
+#| int($lower) == int($upper)) { |
+#| $lower *= 10; |
+#| $upper *= 10; |
+#| $scale++; |
+#| } |
+#| while ($lower >= 10 && |
+#| int($lower) == int($upper)) { |
+#| $lower /= 10; |
+#| $upper /= 10; |
+#| $scale--; |
+#| } |
+#|} |
+ |
+#--------------------------------------------------------------------- |
+# Format a number, optionally with a +/- delta, to n significant |
+# digits. |
+# |
+# @param significant digit, a value >= 1 |
+# @param multiplier |
+# @param time in seconds to be formatted |
+# @optional delta in seconds |
+# |
+# @return string of the form "23" or "23 +/- 10". |
+# |
+sub formatNumber { |
+ my $sigdig = shift; |
+ my $mult = shift; |
+ my $a = shift; |
+ my $delta = shift; # may be undef |
+ |
+ my $result = formatSigDig($sigdig, $a*$mult); |
+ if (defined($delta)) { |
+ my $d = formatSigDig($sigdig, $delta*$mult); |
+ # restrict PRECISION of delta to that of main number |
+ if ($result =~ /\.(\d+)/) { |
+ # TODO make this work for values with all significant |
+ # digits to the left of the decimal, e.g., 1234000. |
+ |
+ # TODO the other thing wrong with this is that it |
+ # isn't rounding the $delta properly. Have to put |
+ # this logic into formatSigDig(). |
+ my $x = length($1); |
+ $d =~ s/\.(\d{$x})\d+/.$1/; |
+ } |
+ $result .= " $PLUS_MINUS " . $d; |
+ } |
+ $result; |
+} |
+ |
+#--------------------------------------------------------------------- |
+# Format a time, optionally with a +/- delta, to n significant |
+# digits. |
+# |
+# @param significant digit, a value >= 1 |
+# @param time in seconds to be formatted |
+# @optional delta in seconds |
+# |
+# @return string of the form "23 ms" or "23 +/- 10 ms". |
+# |
+sub formatSeconds { |
+ my $sigdig = shift; |
+ my $a = shift; |
+ my $delta = shift; # may be undef |
+ |
+ my @MULT = (1 , 1e3, 1e6, 1e9); |
+ my @SUFF = ('s' , 'ms', 'us', 'ns'); |
+ |
+ # Determine our scale |
+ my $i = 0; |
+ #always do seconds if the following line is commented out |
+ ++$i while ($a*$MULT[$i] < 1 && $i < @MULT); |
+ |
+ formatNumber($sigdig, $MULT[$i], $a, $delta) . ' ' . $SUFF[$i]; |
+} |
+ |
+#--------------------------------------------------------------------- |
+# Format a percentage, optionally with a +/- delta, to n significant |
+# digits. |
+# |
+# @param significant digit, a value >= 1 |
+# @param value to be formatted, as a fraction, e.g. 0.5 for 50% |
+# @optional delta, as a fraction |
+# |
+# @return string of the form "23 %" or "23 +/- 10 %". |
+# |
+sub formatPercent { |
+ my $sigdig = shift; |
+ my $a = shift; |
+ my $delta = shift; # may be undef |
+ |
+ formatNumber($sigdig, 100, $a, $delta) . '%'; |
+} |
+ |
+#--------------------------------------------------------------------- |
+# Format a number to n significant digits without using exponential |
+# notation. |
+# |
+# @param significant digit, a value >= 1 |
+# @param number to be formatted |
+# |
+# @return string of the form "1234" "12.34" or "0.001234". If |
+# number was negative, prefixed by '-'. |
+# |
+sub formatSigDig { |
+ my $n = shift() - 1; |
+ my $a = shift; |
+ |
+ local $_ = sprintf("%.${n}e", $a); |
+ my $sign = (s/^-//) ? '-' : ''; |
+ |
+ my $a_e; |
+ my $result; |
+ if (/^(\d)\.(\d+)e([-+]\d+)$/) { |
+ my ($d, $dn, $e) = ($1, $2, $3); |
+ $a_e = $e; |
+ $d .= $dn; |
+ $e++; |
+ $d .= '0' while ($e > length($d)); |
+ while ($e < 1) { |
+ $e++; |
+ $d = '0' . $d; |
+ } |
+ if ($e == length($d)) { |
+ $result = $sign . $d; |
+ } else { |
+ $result = $sign . substr($d, 0, $e) . '.' . substr($d, $e); |
+ } |
+ } else { |
+ die "Can't parse $_"; |
+ } |
+ $result; |
+} |
+ |
+1; |
+ |
+#eof |