[niepce] * src/fwk/utils/fractions.cpp (fwk): Catch conversion exceptions.

[Hubert Figuière <hub src gnome org>]

commit 19986c0fc523a7c45869c0933da1a955c62ffa3a
Author: Hubert Figuiere <hub figuiere net>
Date:   Fri Apr 24 16:30:08 2009 -0400

    	* src/fwk/utils/fractions.cpp (fwk): Catch conversion exceptions.
---
 ChangeLog                   |    4 ++++
 src/fwk/utils/fractions.cpp |   13 +++++++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 7b78828..b1e403c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2009-04-24  Hubert Figuiere  <hub figuiere net>
+
+	* src/fwk/utils/fractions.cpp (fwk): Catch conversion exceptions.
+
 2009-04-21  Hubert Figuiere  <hub figuiere net>
 
 	* src/engine/db/filebundle.cpp: path::stem() is not
diff --git a/src/fwk/utils/fractions.cpp b/src/fwk/utils/fractions.cpp
index 765f3e4..02c06f7 100644
--- a/src/fwk/utils/fractions.cpp
+++ b/src/fwk/utils/fractions.cpp
@@ -21,6 +21,7 @@
 #include <boost/rational.hpp>
 #include <boost/lexical_cast.hpp>
 
+#include "debug.h"
 #include "fractions.hpp"
 
 namespace fwk {
@@ -28,8 +29,16 @@ namespace fwk {
 
 double fraction_to_decimal(const std::string & value)
 {
-    boost::rational<int> r = boost::lexical_cast<boost::rational<int> >(value);
-    return boost::rational_cast<double>(r);
+    double v = 0.0;
+
+    try {
+        boost::rational<int> r = boost::lexical_cast<boost::rational<int> >(value);
+        v = boost::rational_cast<double>(r);
+    }
+    catch(const std::exception & e) {
+        ERR_OUT("unable to cast fraction '%s': %s", value.c_str(), e.what());
+    }
+    return v;
 }