allow distinct prefix for versioned executables

[p5sagit/p5-mst-13.2.git] / lib / bigfloat.pl

diff --git a/lib/bigfloat.pl b/lib/bigfloat.pl
index d687c78..032dfe6 100644 (file)
--- a/lib/bigfloat.pl
+++ b/lib/bigfloat.pl
@@ -6,7 +6,7 @@ require "bigint.pl";
 #
 # number format
 #   canonical strings have the form /[+-]\d+E[+-]\d+/
-#   Input values can have inbedded whitespace
+#   Input values can have embedded whitespace
 # Error returns
 #   'NaN'           An input parameter was "Not a Number" or 
 #                       divide by zero or sqrt of negative number
@@ -126,7 +126,7 @@ sub main'fdiv #(fnum_str, fnum_str[,scale]) return fnum_str
        $scale = length($xm)-1 if (length($xm)-1 > $scale);
        $scale = length($ym)-1 if (length($ym)-1 > $scale);
        $scale = $scale + length($ym) - length($xm);
-       &norm(&round(&'bdiv($xm.('0' x $scale),$ym),$ym),
+       &norm(&round(&'bdiv($xm.('0' x $scale),$ym),&'babs($ym)),
            $xe-$ye-$scale);
     }
 }
@@ -186,7 +186,12 @@ sub main'ffround { #(fnum_str, scale) return fnum_str
            if ($xe < 1) {
                '+0E+0';
            } elsif ($xe == 1) {
-               &norm(&round('+0',"+0".substr($xm,$[+1,1),"+10"), $scale);
+               # The first substr preserves the sign, which means that
+               # we'll pass a non-normalized "-0" to &round when rounding
+               # -0.006 (for example), purely so that &round won't lose
+               # the sign.
+               &norm(&round(substr($xm,$[,1).'0',
+                     "+0".substr($xm,$[+1,1),"+10"), $scale);
            } else {
                &norm(&round(substr($xm,$[,$xe),
                      "+0".substr($xm,$[+$xe,1),"+10"), $scale);