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+/**
+ * @file wrapllerrs.h
+ * @author Nat Goodspeed
+ * @date 2009-03-11
+ * @brief Define a class useful for unit tests that engage llerrs (LL_ERRS) functionality
+ *
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * Copyright (c) 2009, Linden Research, Inc.
+ * $/LicenseInfo$
+ */
+
+#if ! defined(LL_WRAPLLERRS_H)
+#define LL_WRAPLLERRS_H
+
+#include "llerrorcontrol.h"
+
+struct WrapLL_ERRS
+{
+ WrapLL_ERRS():
+ // Resetting Settings discards the default Recorder that writes to
+ // stderr. Otherwise, expected llerrs (LL_ERRS) messages clutter the
+ // console output of successful tests, potentially confusing things.
+ mPriorErrorSettings(LLError::saveAndResetSettings()),
+ // Save shutdown function called by LL_ERRS
+ mPriorFatal(LLError::getFatalFunction())
+ {
+ // Make LL_ERRS call our own operator() method
+ LLError::setFatalFunction(boost::bind(&WrapLL_ERRS::operator(), this, _1));
+ }
+
+ ~WrapLL_ERRS()
+ {
+ LLError::setFatalFunction(mPriorFatal);
+ LLError::restoreSettings(mPriorErrorSettings);
+ }
+
+ struct FatalException: public std::runtime_error
+ {
+ FatalException(const std::string& what): std::runtime_error(what) {}
+ };
+
+ void operator()(const std::string& message)
+ {
+ // Save message for later in case consumer wants to sense the result directly
+ error = message;
+ // Also throw an appropriate exception since calling code is likely to
+ // assume that control won't continue beyond LL_ERRS.
+ throw FatalException(message);
+ }
+
+ std::string error;
+ LLError::Settings* mPriorErrorSettings;
+ LLError::FatalFunction mPriorFatal;
+};
+
+#endif /* ! defined(LL_WRAPLLERRS_H) */