xpcom_support.cpp

   1 // Copyright 2005 Ben Hutchings <ben@decadent.org.uk>.
   2 // See the file "COPYING" for licence details.
   3
   4 #include <cstdio>
   5 #include <cassert>
   6 #include <memory>
   7 #include <stdexcept>
   8
   9 #include "xpcom_support.hpp"
  10
  11 namespace xpcom_support
  12 {
  13     void throw_exception(nsresult error)
  14     {
  15         assert(NS_ERROR_GET_SEVERITY(error) == NS_ERROR_SEVERITY_ERROR);
  16
  17         // TODO: look up error message
  18         char message[30];
  19         std::sprintf(message, "XPCOM error %08x", error);
  20
  21         switch (error)
  22         {
  23         case NS_ERROR_OUT_OF_MEMORY:
  24             throw std::bad_alloc();
  25
  26         case NS_ERROR_NOT_INITIALIZED:
  27         case NS_ERROR_ALREADY_INITIALIZED:
  28         case NS_ERROR_INVALID_POINTER:
  29         case NS_ERROR_ILLEGAL_VALUE:
  30         case NS_BASE_STREAM_CLOSED:
  31         case NS_BASE_STREAM_ILLEGAL_ARGS:
  32             assert(!"internal error detected by XPCOM function");
  33             throw std::logic_error(message);
  34
  35         default:
  36             throw std::runtime_error(message);
  37         }
  38     }
  39 }