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Diffstat (limited to 'contrib/src/LuaBridge/detail/LuaException.h')
-rw-r--r-- | contrib/src/LuaBridge/detail/LuaException.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/contrib/src/LuaBridge/detail/LuaException.h b/contrib/src/LuaBridge/detail/LuaException.h new file mode 100644 index 0000000..a094496 --- /dev/null +++ b/contrib/src/LuaBridge/detail/LuaException.h @@ -0,0 +1,113 @@ +//------------------------------------------------------------------------------ +/* + https://github.com/vinniefalco/LuaBridge + + Copyright 2012, Vinnie Falco <vinnie.falco@gmail.com> + Copyright 2008, Nigel Atkinson <suprapilot+LuaCode@gmail.com> + + License: The MIT License (http://www.opensource.org/licenses/mit-license.php) + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in all + copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + SOFTWARE. +*/ +//============================================================================== + +class LuaException : public std::exception +{ +private: + lua_State* m_L; + std::string m_what; + +public: + //---------------------------------------------------------------------------- + /** + Construct a LuaException after a lua_pcall(). + */ + LuaException (lua_State* L, int /*code*/) + : m_L (L) + { + whatFromStack (); + } + + //---------------------------------------------------------------------------- + + LuaException (lua_State *L, + char const*, + char const*, + long) + : m_L (L) + { + whatFromStack (); + } + + //---------------------------------------------------------------------------- + + ~LuaException() throw () + { + } + + //---------------------------------------------------------------------------- + + char const* what() const throw () + { + return m_what.c_str(); + } + + //============================================================================ + /** + Throw an exception. + + This centralizes all the exceptions thrown, so that we can set + breakpoints before the stack is unwound, or otherwise customize the + behavior. + */ + template <class Exception> + static void Throw (Exception e) + { + throw e; + } + + //---------------------------------------------------------------------------- + /** + Wrapper for lua_pcall that throws. + */ + static void pcall (lua_State* L, int nargs = 0, int nresults = 0, int msgh = 0) + { + int code = lua_pcall (L, nargs, nresults, msgh); + + if (code != LUABRIDGE_LUA_OK) + Throw (LuaException (L, code)); + } + + //---------------------------------------------------------------------------- + +protected: + void whatFromStack () + { + if (lua_gettop (m_L) > 0) + { + char const* s = lua_tostring (m_L, -1); + m_what = s ? s : ""; + } + else + { + // stack is empty + m_what = "missing error"; + } + } +}; |