core/except.cpp

   1
   2 #include "config.h"
   3
   4 #include "except.h"
   5
   6 #include <cstdio>
   7 #include <cstdarg>
   8
   9 #include "opthelpers.h"
  10
  11
  12 namespace al {
  13
  14 base_exception::~base_exception() = default;
  15
  16 void base_exception::setMessage(const char* msg, std::va_list args)
  17 {
  18     std::va_list args2;
  19     va_copy(args2, args);
  20     int msglen{std::vsnprintf(nullptr, 0, msg, args)};
  21     if(msglen > 0) LIKELY
  22     {
  23         mMessage.resize(static_cast<size_t>(msglen)+1);
  24         std::vsnprintf(const_cast<char*>(mMessage.data()), mMessage.length(), msg, args2);
  25         mMessage.pop_back();
  26     }
  27     va_end(args2);
  28 }
  29
  30 } // namespace al