//---------------------------------------------------------------------------
bool File::Truncate (int64u Offset)
{
if (File_Handle==NULL)
return false;
#ifdef ZENLIB_USEWX
return false; //Not supported
#else //ZENLIB_USEWX
#ifdef ZENLIB_STANDARD
#if defined(WINDOWS)
return false; //Not supported
#else //defined(WINDOWS)
//Need to close the file, use truncate, reopen it
if (Offset==(int64u)-1)
Offset=Position_Get();
Ztring File_Name_Sav=File_Name;
Close();
truncate(File_Name_Sav.To_Local().c_str(), Offset);
if (!Open(File_Name_Sav, Access_Read_Write))
return false;
GoTo(0, FromEnd);
return true;
#endif //!defined(WINDOWS)
#elif defined WINDOWS
if(Offset!=(int64u)-1 && Offset!=Position_Get())
if (!GoTo(Offset))
return false;
SetEndOfFile(File_Handle);
return true;
#endif
#endif //ZENLIB_USEWX
}
//---------------------------------------------------------------------------
size_t File::Read (int8u* Buffer, size_t Buffer_Size_Max)
{
if (File_Handle==NULL)
return 0;
#ifdef ZENLIB_USEWX
size_t ByteRead=((wxFile*)File_Handle)->Read(Buffer, Buffer_Size_Max);
Position+=ByteRead;
return ByteRead;
#else //ZENLIB_USEWX
#ifdef ZENLIB_STANDARD
//return read((int)File_Handle, Buffer, Buffer_Size_Max);
if (Position==(int64u)-1)
Position_Get();
if (Size==(int64u)-1)
Size_Get();
if (Position!=(int64u)-1 && Position+Buffer_Size_Max>Size)
Buffer_Size_Max=(size_t)(Size-Position); //We don't want to enable eofbit (impossible to seek after)
((fstream*)File_Handle)->read((char*)Buffer, Buffer_Size_Max);
size_t ByteRead=((fstream*)File_Handle)->gcount();
Position+=ByteRead;
return ByteRead;
#elif defined WINDOWS
DWORD Buffer_Size;
if (ReadFile(File_Handle, Buffer, (DWORD)Buffer_Size_Max, &Buffer_Size, NULL))
{
Position+=Buffer_Size;
return Buffer_Size;
}
else
return 0;
#endif
#endif //ZENLIB_USEWX
}
