C++ MDFN_Error函数代码示例

bool CDIF_ST::Eject(bool eject_status)
{
   if(UnrecoverableError)
      return(false);

   try
   {
      int32_t old_de = DiscEjected;

      DiscEjected = eject_status;

      if(old_de != DiscEjected)
      {
         disc_cdaccess->Eject(eject_status);

         if(!eject_status)     // Re-read the TOC
         {
            disc_cdaccess->Read_TOC(&disc_toc);

            if(disc_toc.first_track < 1 || disc_toc.last_track > 99 || disc_toc.first_track > disc_toc.last_track)
               throw(MDFN_Error(0, _("TOC first(%d)/last(%d) track numbers bad."), disc_toc.first_track, disc_toc.last_track));
         }
      }
   }
   catch(std::exception &e)
   {
      log_cb(RETRO_LOG_ERROR, "%s\n", e.what());
      return(false);
   }

   return(true);
}

MemoryStream::MemoryStream() : data_buffer(NULL), data_buffer_size(0), data_buffer_alloced(0), position(0)
{
 data_buffer_size = 0;
 data_buffer_alloced = 64;
 if(!(data_buffer = (uint8*)realloc(data_buffer, data_buffer_alloced)))
  throw MDFN_Error(ErrnoHolder(errno));
}

static void LoadPRG(Stream *fp)
{
 uint32 t;
 unsigned z;

 z = uchead.ID[3] - '0';	// FIXME hex

 if(z > 15)
  throw MDFN_Error(0, "Invalid PRG ROM index '%c'.\n", uchead.ID[3]);

 MDFN_printf(_("PRG ROM %u size: %u\n"), z, uchead.info);

 if(malloced[z])
  free(malloced[z]);

 t = FixRomSize(uchead.info, 2048);

 malloced[z] = (uint8 *)MDFN_malloc_T(t, _("PRG ROM"));
 mallocedsizes[z] = t;
 memset(malloced[z] + uchead.info, 0xFF, t - uchead.info);

 fp->read(malloced[z], uchead.info);

 SetupCartPRGMapping(z,malloced[z],t,0); 
}

void Stream::print_format(const char *format, ...)
{
 char *str = NULL;
 int rc;

 va_list ap;

 va_start(ap, format);

 rc = trio_vasprintf(&str, format, ap);

 va_end(ap);

 if(rc < 0)
  throw MDFN_Error(0, "Error in trio_vasprintf()");
 else
 {
  try	// Bleck
  {
   write(str, rc);
  }
  catch(...)
  {
   free(str);
   throw;
  }
  free(str);
 }
}

void CDIF_MT::RT_EjectDisc(bool eject_status, bool skip_actual_eject)
{
   int32_t old_de = DiscEjected;

   DiscEjected = eject_status;

   if(old_de != DiscEjected)
   {
      if(!skip_actual_eject)
         disc_cdaccess->Eject(eject_status);

      if(!eject_status)	// Re-read the TOC
      {
         disc_cdaccess->Read_TOC(&disc_toc);

         if(disc_toc.first_track < 1 || disc_toc.last_track > 99 || disc_toc.first_track > disc_toc.last_track)
            throw(MDFN_Error(0, _("TOC first(%d)/last(%d) track numbers bad."), disc_toc.first_track, disc_toc.last_track));
      }

      SBWritePos = 0;
      ra_lba = 0;
      ra_count = 0;
      last_read_lba = ~0U;
      memset(SectorBuffers, 0, SBSize * sizeof(CDIF_Sector_Buffer));
   }
}

// Returns FALSE if message not read, TRUE if it was read.  Will always return TRUE if "blocking" is set.
// Will throw MDFN_Error if the read message code is CDIF_MSG_FATAL_ERROR
bool CDIF_Queue::Read(CDIF_Message *message, bool blocking)
{
   bool ret = true;

   slock_lock((slock_t*)ze_mutex);

   if(blocking)
   {
      while(ze_queue.size() == 0)	// while, not just if.
         scond_wait((scond_t*)ze_cond, (slock_t*)ze_mutex);
   }

   if(ze_queue.size() == 0)
      ret = false;
   else
   {
      *message = ze_queue.front();
      ze_queue.pop();
   }  

   slock_unlock((slock_t*)ze_mutex);

   if(ret && message->message == CDIF_MSG_FATAL_ERROR)
      throw MDFN_Error(0, "%s", message->str_message.c_str());

   return(ret);
}

// Integrity checking is experimental, and needs work to function properly(in the emulator cores).
static int SendIntegrity(void)
{
 StateMem sm;
 md5_context md5;
 uint8 digest[16];

 memset(&sm, 0, sizeof(StateMem));

 // Do not do a raw/data-only state for speed, due to lack of endian and bool conversion.
 if(!MDFNSS_SaveSM(&sm, 0, false))
 {
  throw MDFN_Error(0, _("Error during save state generation."));
 }

 md5.starts();
 md5.update(sm.data, sm.len);
 md5.finish(digest);

 free(sm.data);

 //for(int i = 15; i >= 0; i--)
 // printf("%02x", digest[i]);
 //puts("");

 SendCommand(MDFNNPCMD_INTEGRITY_RES, 16, digest);

 return(1);
}

MemoryStream::MemoryStream(uint64 size_hint) : data_buffer(NULL), data_buffer_size(0), data_buffer_alloced(0), position(0)
{
 data_buffer_size = 0;
 data_buffer_alloced = (size_hint > SIZE_MAX) ? SIZE_MAX : size_hint;

 if(!(data_buffer = (uint8*)realloc(data_buffer, (size_t)data_buffer_alloced)))
  throw MDFN_Error(ErrnoHolder(errno));
}

FileWrapper::FileWrapper(const char *path, const int mode, const char *purpose) : OpenedMode(mode)
{
 path_save = std::string(path);

 if(mode == MODE_READ)
  fp = fopen(path, "rb");
 else if(mode == MODE_WRITE)
  fp = fopen(path, "wb");
 else if(mode == MODE_WRITE_SAFE)	// SO ANNOYING
 {
  int open_flags = O_WRONLY | O_CREAT | O_EXCL;

  #ifdef O_BINARY
   open_flags |= O_BINARY;
  #elif defined(_O_BINARY)
   open_flags |= _O_BINARY;
  #endif

  #if defined(S_IRGRP) && defined(S_IROTH) 
  int tmpfd = open(path, open_flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
  #else
  int tmpfd = open(path, open_flags, S_IRUSR | S_IWUSR);
  #endif
  if(tmpfd == -1)
  {
   ErrnoHolder ene(errno);

   if(purpose)
    throw(MDFN_Error(ene.Errno(), _("Error opening file \"%s\" for \"%s\": %s"), path_save.c_str(), purpose, ene.StrError()));
   else
    throw(MDFN_Error(ene.Errno(), _("Error opening file \"%s\": %s"), path_save.c_str(), ene.StrError()));
  }
  fp = fdopen(tmpfd, "wb");
 }

 if(!fp)
 {
  ErrnoHolder ene(errno);

  if(purpose)
   throw(MDFN_Error(ene.Errno(), _("Error opening file \"%s\" for \"%s\": %s"), path_save.c_str(), purpose, ene.StrError()));
  else
   throw(MDFN_Error(ene.Errno(), _("Error opening file \"%s\": %s"), path_save.c_str(), ene.StrError()));
 }
}

void FileWrapper::flush(void)
{
 if(fflush(fp) == EOF)
 {
  ErrnoHolder ene(errno);

  throw(MDFN_Error(ene.Errno(), _("Error flushing to opened file \"%s\": %s"), path_save.c_str(), ene.StrError()));
 }
}

void FileStream::truncate(uint64 length)
{
 if(fflush(fp) == EOF)
 {
  ErrnoHolder ene(errno);

  throw(MDFN_Error(ene.Errno(), _("Error truncating opened file \"%s\": %s"), path_save.c_str(), ene.StrError()));
 }
}

FileStream::FileStream(const std::string& path, const int mode) : OpenedMode(mode), mapping(NULL), mapping_size(0)
{
 path_save = path;

 if(mode == MODE_READ)
  fp = fopen(path.c_str(), "rb");
 else if(mode == MODE_WRITE)
  fp = fopen(path.c_str(), "wb");
 else if(mode == MODE_WRITE_SAFE || mode == MODE_WRITE_INPLACE)	// SO ANNOYING
 {
  int open_flags = O_WRONLY | O_CREAT;

  if(mode == MODE_WRITE_SAFE)
   open_flags |= O_EXCL;

  #ifdef O_BINARY
   open_flags |= O_BINARY;
  #elif defined(_O_BINARY)
   open_flags |= _O_BINARY;
  #endif

  #if defined(S_IRGRP) && defined(S_IROTH) 
  int tmpfd = open(path.c_str(), open_flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
  #else
  int tmpfd = open(path.c_str(), open_flags, S_IRUSR | S_IWUSR);
  #endif
  if(tmpfd == -1)
  {
   ErrnoHolder ene(errno);

   throw(MDFN_Error(ene.Errno(), _("Error opening file \"%s\": %s"), path_save.c_str(), ene.StrError()));
  }
  fp = fdopen(tmpfd, "wb");
 }
 else
  abort();

 if(!fp)
 {
  ErrnoHolder ene(errno);

  throw(MDFN_Error(ene.Errno(), _("Error opening file \"%s\": %s"), path_save.c_str(), ene.StrError()));
 }
}

MCGenjin::MCGenjin(Blip_Buffer *bb, const uint8 *rr, uint32 rr_size)
{
 uint8 revision, num256_pages, region, cs_di[2];

 if(rr_size < 8192)
  throw MDFN_Error(0, _("MCGenjin ROM size is too small!"));

 if(memcmp(rr + 0x1FD0, "MCGENJIN", 8))
  throw MDFN_Error(0, _("MC Genjin header magic missing!"));

 rom.resize(round_up_pow2(rr_size));

 memcpy(&rom[0], rr, rr_size);

 revision = rom[0x1FD8];
 num256_pages = rom[0x1FD9];
 region = rom[0x1FDA];
 cs_di[0] = rom[0x1FDB];
 cs_di[1] = rom[0x1FDC];

 for(unsigned i = 0; i < 2; i++)
 {
  switch(cs_di[i])
  {
   default:
	for(unsigned si = 0; si < i; si++) // FIXME: auto ptr to make this not necessary
         delete cs[si];

	throw MDFN_Error(0, _("Unsupported MCGENJIN device on CS%d: 0x%02x"), i, cs_di[i]);
	break;

   case 0x00:
	MDFN_printf(_("CS%d: Unused\n"), i);
	cs[i] = new MCGenjin_CS_Device();
	break;

   case 0x10 ... 0x18:
   case 0x20 ... 0x28:
	MDFN_printf(_("CS%d: %uKiB %sRAM\n"), i, 8 << (cs_di[i] & 0xF), (cs_di[i] & 0x20) ? "Nonvolatile " : "");
	cs[i] = new MCGenjin_CS_Device_RAM(8192 << (cs_di[i] & 0xF), (bool)(cs_di[i] & 0x20));
	break;
  }
 }
}

void FileStream::truncate(uint64 length)
{
	//not needed by mednadisc
 //if(fflush(fp) == EOF || ftruncate(fileno(fp), length) != 0)
 {
  ErrnoHolder ene(errno);

  throw(MDFN_Error(ene.Errno(), _("Error truncating opened file \"%s\": %s"), path_save.c_str(), ene.StrError()));
 }
}

static void RecvState(const uint32 clen)
{
 StateMem sm;
 std::vector<uint8> cbuf;
 std::vector<uint8> buf;

 memset(&sm, 0, sizeof(StateMem));

 if(clen < 4)
 {
  throw MDFN_Error(0, _("Compressed save state data is too small: %u"), clen);
 }

 if(clen > 8 * 1024 * 1024) // Compressed length sanity check - 8 MiB max.
 {
  throw MDFN_Error(0, _("Compressed save state data is too large: %u"), clen);
 }

 cbuf.resize(clen);

 MDFND_RecvData(&cbuf[0], clen);

 uLongf len = MDFN_de32lsb(&cbuf[0]);
 if(len > 12 * 1024 * 1024) // Uncompressed length sanity check - 12 MiB max.
 {
  throw MDFN_Error(0, _("Uncompressed save state data is too large: %llu"), (unsigned long long)len);
 }

 buf.resize(len);

 uncompress((Bytef *)&buf[0], &len, (Bytef *)&cbuf[0] + 4, clen - 4);

 sm.data = &buf[0];
 sm.len = len;

 if(!MDFNSS_LoadSM(&sm, 0, 0))
 {
  throw MDFN_Error(0, _("Error during save state loading."));
 }

 if(MDFNMOV_IsRecording())
  MDFNMOV_RecordState();
}