From 79c56adea40686bb822c75ec12a72a945d079f41 Mon Sep 17 00:00:00 2001
From: Tyson Grant Nottingham <tgnottingham@gmail.com>
Date: Tue, 22 Jul 2014 21:58:41 -0700
Subject: [PATCH] Don't use isdigit() in fast_atof.

---
 code/fast_atof.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/code/fast_atof.h b/code/fast_atof.h
index a7f0cb23f..4ff666b38 100644
--- a/code/fast_atof.h
+++ b/code/fast_atof.h
@@ -236,7 +236,8 @@ inline const char* fast_atoreal_move( const char* c, Real& out, bool check_comma
 		++c;
 	}
 
-        if (!isdigit(*c) && !(*c == '.' && isdigit(c[1])))
+        if (!(c[0] >= '0' && c[0] <= '9') &&
+                !(c[0] == '.' && c[1] >= '0' && c[1] <= '9'))
         {
                 throw std::invalid_argument("Cannot parse string "
                         "as real number: does not start with digit "