From bd02aac18aee04c804aece969bb478dffafe52fa Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Sat, 22 Mar 2014 13:02:21 +0000
Subject: [PATCH] No longer accept and silently convert invalid REAL tokens to
 zero

---
 src/ifcparse/IfcParse.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/ifcparse/IfcParse.cpp b/src/ifcparse/IfcParse.cpp
index 399cc47db9..d447cc65e5 100644
--- a/src/ifcparse/IfcParse.cpp
+++ b/src/ifcparse/IfcParse.cpp
@@ -345,7 +345,11 @@ bool TokenFunc::asBool(const Token& t) {
 }
 double TokenFunc::asFloat(const Token& t) {
 	const std::string str = asString(t);
-	return (double) atof(str.c_str());
+	const char* start = str.c_str();
+	char* end;
+	double result = strtod(start,&end);
+	if ( start == end ) throw IfcException("Token is not a real");
+	return result;
 }
 std::string TokenFunc::asString(const Token& t) {
 	if ( isOperator(t,'$') ) return "";