From 7cad0069e8f4a652d0e22f1b0198f67399e80157 Mon Sep 17 00:00:00 2001
From: David Adam <zanchey@ucc.gu.uwa.edu.au>
Date: Sat, 27 Sep 2014 18:36:33 +0800
Subject: [PATCH] math.fish: support floating-point maths
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Closes #1643.

Thanks to Mickaël RAYBAUD-ROIG (https://github.com/m-r-r) for the idea
of printf.
---
 share/functions/math.fish | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/share/functions/math.fish b/share/functions/math.fish
index ced85aad4..a782f7d75 100644
--- a/share/functions/math.fish
+++ b/share/functions/math.fish
@@ -7,8 +7,13 @@ function math --description "Perform math calculations in bc"
 				return 0
 		end
 
-		set -l out (echo $argv|env BC_LINE_LENGTH=0 bc)
-                test -z "$out"; and return 1
+		# Override the locale so that the output can be used as input
+		set -l LC_NUMERIC C
+		# GNU bc extension
+		set -l BC_LINE_LENGTH 0
+
+		set -l out (printf '%g' (echo $argv| bc -l))
+		test -z "$out"; and return 1
 		echo $out
 		switch $out
 			case 0