Exception update

1 files changed, 28 insertions, 0 deletions

diff --git a/klm/util/exception.cc b/klm/util/exception.cc
index 84f9fe7c..62280970 100644
--- a/klm/util/exception.cc
+++ b/klm/util/exception.cc
@@ -1,5 +1,9 @@
 #include "util/exception.hh"
 
+#ifdef __GXX_RTTI
+#include <typeinfo>
+#endif
+
 #include <errno.h>
 #include <string.h>
 
@@ -22,6 +26,30 @@ const char *Exception::what() const throw() {
   return text_.c_str();
 }
 
+void Exception::SetLocation(const char *file, unsigned int line, const char *func, const char *child_name, const char *condition) {
+  /* The child class might have set some text, but we want this to come first.
+   * Another option would be passing this information to the constructor, but
+   * then child classes would have to accept constructor arguments and pass
+   * them down.  
+   */
+  text_ = stream_.str();
+  stream_.str("");
+  stream_ << file << ':' << line;
+  if (func) stream_ << " in " << func << " threw ";
+  if (child_name) {
+    stream_ << child_name;
+  } else {
+#ifdef __GXX_RTTI
+    stream_ << typeid(this).name();
+#else
+    stream_ << "an exception";
+#endif
+  }
+  if (condition) stream_ << " because `" << condition;
+  stream_ << "'.\n";
+  stream_ << text_;
+}
+
 namespace {
 // The XOPEN version.
 const char *HandleStrerror(int ret, const char *buf) {