mirror of
				https://github.com/OpenMW/openmw.git
				synced 2025-10-31 12:26:39 +00:00 
			
		
		
		
	
		
			
				
	
	
		
			86 lines
		
	
	
	
		
			2.5 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			86 lines
		
	
	
	
		
			2.5 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
| #include "reader.hpp"
 | |
| 
 | |
| //#ifdef NDEBUG
 | |
| //#undef NDEBUG
 | |
| //#endif
 | |
| 
 | |
| #include <cassert>
 | |
| #include <stdexcept>
 | |
| 
 | |
| #include <components/files/constrainedfilestream.hpp>
 | |
| 
 | |
| #include "components/esm3/esmreader.hpp"
 | |
| #include "components/esm4/reader.hpp"
 | |
| 
 | |
| namespace ESM
 | |
| {
 | |
|     Reader* Reader::getReader(const std::string &filename)
 | |
|     {
 | |
|         Files::IStreamPtr esmStream(Files::openConstrainedFileStream(filename));
 | |
| 
 | |
|         std::uint32_t modVer = 0; // get the first 4 bytes of the record header only
 | |
|         esmStream->read((char*)&modVer, sizeof(modVer));
 | |
|         if (esmStream->gcount() == sizeof(modVer))
 | |
|         {
 | |
|             esmStream->seekg(0);
 | |
| 
 | |
|             if (modVer == ESM4::REC_TES4)
 | |
|             {
 | |
|                 return new ESM4::Reader(std::move(esmStream), filename);
 | |
|             }
 | |
|             else
 | |
|             {
 | |
|                 //return new ESM3::ESMReader(esmStream, filename);
 | |
|             }
 | |
|         }
 | |
| 
 | |
|         throw std::runtime_error("Unknown file format");
 | |
|     }
 | |
| 
 | |
|     bool Reader::getStringImpl(std::string& str, std::size_t size,
 | |
|             std::istream& stream, const ToUTF8::StatelessUtf8Encoder* encoder, bool hasNull)
 | |
|     {
 | |
|         std::size_t newSize = size;
 | |
| 
 | |
|         if (encoder)
 | |
|         {
 | |
|             std::string input(size, '\0');
 | |
|             stream.read(input.data(), size);
 | |
|             if (stream.gcount() == static_cast<std::streamsize>(size))
 | |
|             {
 | |
|                 encoder->getUtf8(input, ToUTF8::BufferAllocationPolicy::FitToRequiredSize, str);
 | |
|                 return true;
 | |
|             }
 | |
|         }
 | |
|         else
 | |
|         {
 | |
|             if (hasNull)
 | |
|                 newSize -= 1; // don't read the null terminator yet
 | |
| 
 | |
|             str.resize(newSize); // assumed C++11
 | |
|             stream.read(&str[0], newSize);
 | |
|             if (static_cast<std::size_t>(stream.gcount()) == newSize)
 | |
|             {
 | |
|                 if (hasNull)
 | |
|                 {
 | |
|                     char ch;
 | |
|                     stream.read(&ch, 1); // read the null terminator
 | |
|                     assert (ch == '\0'
 | |
|                             && "ESM4::Reader::getString string is not terminated with a null");
 | |
|                 }
 | |
| #if 0
 | |
|                 else
 | |
|                 {
 | |
|                     // NOTE: normal ESMs don't but omwsave has locals or spells with null terminator
 | |
|                     assert (str[newSize - 1] != '\0'
 | |
|                             && "ESM4::Reader::getString string is unexpectedly terminated with a null");
 | |
|                 }
 | |
| #endif
 | |
|                 return true;
 | |
|             }
 | |
|         }
 | |
| 
 | |
|         str.clear();
 | |
|         return false; // FIXME: throw instead?
 | |
|     }
 | |
| }
 |