xpcom_support.cpp

   1 // Copyright 2005 Ben Hutchings <ben@decadentplace.org.uk>.
   2 // See the file "COPYING" for licence details.
   3
   4 #include <cassert>
   5 #include <memory>
   6 #include <stdexcept>
   7
   8 #include "xpcom_support.hpp"
   9
  10 namespace xpcom_support
  11 {
  12     void throw_exception(nsresult error)
  13     {
  14         assert(NS_ERROR_GET_SEVERITY(error) == NS_ERROR_SEVERITY_ERROR);
  15
  16         // TODO: look up error message
  17         char message[30];
  18         std::sprintf(message, "XPCOM error %08x", error);
  19
  20         switch (error)
  21         {
  22         case NS_ERROR_OUT_OF_MEMORY:
  23             throw std::bad_alloc();
  24
  25         case NS_ERROR_NOT_INITIALIZED:
  26         case NS_ERROR_ALREADY_INITIALIZED:
  27         case NS_ERROR_INVALID_POINTER:
  28         case NS_ERROR_ILLEGAL_VALUE:
  29         case NS_BASE_STREAM_CLOSED:
  30         case NS_BASE_STREAM_ILLEGAL_ARGS:
  31             assert(!"internal error detected by XPCOM function");
  32             throw std::logic_error(message);
  33
  34         default:
  35             throw std::runtime_error(message);
  36         }
  37     }
  38 }