kits/storage/ResourceFile.cpp

8 	\file ResourceFile.cpp
44 // recognized file types (indices into kFileTypeNames)
57 	"x86 resource file",
58 	"PPC resource file",
59 	"ELF object file",
60 	"PEF object file",
61 	"empty file",
78 read_exactly(BPositionIO& file, off_t position, void* buffer, size_t size,
81 	ssize_t read = file.ReadAt(position, buffer, size);
95 write_exactly(BPositionIO& file, off_t position, const void* buffer,
98 	ssize_t written = file.WriteAt(position, buffer, size);
240 ResourceFile::SetTo(BFile* file, bool clobber)
242 	status_t error = (file ? B_OK : B_BAD_VALUE);
246 			_InitFile(*file, clobber);
290 			// get the file size
293 				throw Exception(error, "Failed to get the file size.");
378 ResourceFile::_InitFile(BFile& file, bool clobber)
382 	// get the file size first
384 	error = file.GetSize(&fileSize);
386 		throw Exception(error, "Failed to get the file size.");
387 	// read the first four bytes, and check, if they identify a resource file
390 		read_exactly(file, 0, magic, 4, "Failed to read magic number.");
392 		throw Exception(B_IO_ERROR, "File is not a resource file.");
394 		// empty file
397 		fFile.SetTo(&file, 0);
400 		// x86 resource file
403 		fFile.SetTo(&file, kX86ResourcesOffset);
407 		read_exactly(file, 0, &pefHeader, kPEFContainerHeaderSize,
410 			// PPC resource file
413 			fFile.SetTo(&file, kPPCResourcesOffset);
416 			// PEF file
418 			_InitPEFFile(file, pefHeader);
420 			throw Exception(B_IO_ERROR, "File is not a resource file.");
422 		// ELF file
424 		_InitELFFile(file);
426 		// x86 resource file with screwed magic?
428 //									"for x86 resource file. Try anyway.",
433 		fFile.SetTo(&file, kX86ResourcesOffset);
437 			// make it an x86 resource file
440 			fFile.SetTo(&file, 0);
442 			throw Exception(B_IO_ERROR, "File is not a resource file.");
446 		throw Exception(error, "Failed to initialize resource file.");
457 ResourceFile::_InitELFFile(BFile& file)
461 	// get the file size
463 	error = file.GetSize(&fileSize);
465 		throw Exception(error, "Failed to get the file size.");
469 	read_exactly(file, 0, identification, EI_NIDENT,
492 			_InitELFXFile<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr>(file, fileSize);
495 			_InitELFXFile<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr>(file, fileSize);
506 ResourceFile::_InitELFXFile(BFile& file, uint64 fileSize)
510 	read_exactly(file, 0, &fileHeader, sizeof(ElfHeader),
546 				"table exceeds file: %lu.",
559 		read_exactly(file, programHeaderTableOffset, programHeaders,
584 						"segment exceeds file: %lu.", segmentEnd);
604 				"table exceeds file: %lu.",
617 		read_exactly(file, sectionHeaderTableOffset, sectionHeaders,
633 			// SHT_NOBITS sections take no space in the file
642 						"section exceeds file: %lu.", sectionEnd);
652 		// not necessary to align the position of the resources in the file to
663 			throw Exception(B_IO_ERROR, "The ELF object file requires an "
670 //		throw Exception("The ELF object file does not contain resources.");
675 	// fine, init the offset file
676 	fFile.SetTo(&file, resourceOffset);
681 ResourceFile::_InitPEFFile(BFile& file, const PEFContainerHeader& pefHeader)
684 	// get the file size
686 	error = file.GetSize(&fileSize);
688 		throw Exception(error, "Failed to get the file size.");
691 		throw Exception(B_IO_ERROR, "PEF file architecture is not PPC.");
703 		read_exactly(file, shOffset, &sectionHeader, kPEFSectionHeaderSize,
716 				"exceeds file: %" B_PRIu32 ".", sectionEnd);
721 //		throw Exception("The PEF object file does not contain resources.");
725 	// init the offset file
726 	fFile.SetTo(&file, resourceOffset);
1029 					" sum: In file: %" B_PRIx32 ", calculated: %" B_PRIx32 ".",
1150 		// set the file size
1298 			BFile* file = fFile.File();
1299 			// make it an x86 resource file
1300 			error = file->SetSize(4);
1302 				throw Exception(error, "Failed to set file size.");
1303 			write_exactly(*file, 0, kX86ResourceFileMagic, 4,
1307 			fFile.SetTo(file, kX86ResourcesOffset);