Warning, /include/Geant4/tools/wroot/file is written in an unsupported language. File is not indexed.
0001 // Copyright (C) 2010, Guy Barrand. All rights reserved.
0002 // See the file tools.license for terms.
0003
0004 #ifndef tools_wroot_file
0005 #define tools_wroot_file
0006
0007 #include "ifile"
0008
0009 #include "directory"
0010
0011 #include "infos"
0012 #include "free_seg"
0013
0014 #include "../platform"
0015
0016 #include "../path"
0017
0018 #include <map>
0019
0020 #include <fcntl.h>
0021 #include <errno.h>
0022 #include <sys/stat.h>
0023
0024 #if defined(_MSC_VER) || defined(__MINGW32__)
0025 #include <direct.h>
0026 #include <io.h>
0027 #else
0028 #include <unistd.h>
0029 #endif
0030
0031 namespace tools {
0032 namespace wroot {
0033
0034 class file : public virtual ifile {
0035 file& get_me() {return *this;} //_MSC_VER : to avoid warning about the usage of "this" in the constructor.
0036 static int not_open() {return -1;}
0037 static uint32 kBegin() {return 64;}
0038 public:
0039 static const std::string& s_class() {
0040 static const std::string s_v("tools::wroot::file");
0041 return s_v;
0042 }
0043 virtual const std::string& s_cls() const {return s_class();}
0044 public: //ifile
0045 virtual bool verbose() const {return m_verbose;}
0046 virtual std::ostream& out() const {return m_out;}
0047
0048 virtual bool byte_swap() const {return is_little_endian();}
0049 virtual bool set_pos(seek a_offset = 0,from a_from = begin){
0050 int whence = 0;
0051 switch(a_from) {
0052 case begin:
0053 whence = SEEK_SET;
0054 break;
0055 case current:
0056 whence = SEEK_CUR;
0057 break;
0058 case end:
0059 whence = SEEK_END;
0060 break;
0061 }
0062
0063 #if defined(__linux__) && (__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 2)
0064 if (::lseek64(m_file, a_offset, whence) < 0) {
0065 #elif defined(_MSC_VER) || defined(__MINGW32__)
0066 if (::_lseeki64(m_file, a_offset, whence) < 0) {
0067 #else
0068 if (::lseek(m_file, a_offset, whence) < 0) {
0069 #endif
0070 m_out << "tools::wroot::file::set_pos :"
0071 << " cannot set position " << a_offset
0072 << " in file " << sout(m_path) << "."
0073 << std::endl;
0074 return false;
0075 }
0076 return true;
0077 }
0078
0079 virtual seek END() const {return m_END;}
0080 virtual void set_END(seek a_end){
0081 m_END = a_end;
0082
0083 if(m_free_segs.empty()) {
0084 m_out << "tools::wroot::file::set_END :"
0085 << " free_seg list should not be empty here."
0086 << std::endl;
0087 } else {
0088 free_seg* end_seg = m_free_segs.back();
0089 if(end_seg->last()!=START_BIG_FILE()) {
0090 m_out << "tools::wroot::file::set_END :"
0091 << " last free_seg is not the ending of file one."
0092 << " free_seg list looks corrupted."
0093 << std::endl;
0094 } else {
0095 m_free_segs.back()->set_first(m_END);
0096 }
0097 }
0098 }
0099
0100 virtual bool write_buffer(const char* a_buffer,uint32 a_length) {
0101 // Write a buffer to the file. This is the basic low level write operation.
0102 #ifdef _MSC_VER
0103 typedef int ssize_t;
0104 #endif
0105 ssize_t siz;
0106 while ((siz = ::write(m_file,a_buffer,a_length)) < 0 &&
0107 error_number() == EINTR) reset_error_number();
0108
0109 if(siz < 0) {
0110 m_out << "tools::wroot::file::write_buffer :"
0111 << " error writing to file " << sout(m_path) << "."
0112 << std::endl;
0113 return false;
0114 }
0115 if(siz!=(ssize_t)a_length) {
0116 m_out << "tools::wroot::file::write_buffer :"
0117 << "error writing all requested bytes to file " << sout(m_path)
0118 << ", wrote " << long_out(siz) << " of " << a_length
0119 << std::endl;
0120 return false;
0121 }
0122 //m_bytes_write += siz;
0123 return true;
0124 }
0125
0126 virtual uint32 version() const {
0127 // Return version id as an integer, i.e. "2.22/04" -> 22204.
0128 static const uint32 ROOT_MAJOR_VERSION = 4;
0129 static const uint32 ROOT_MINOR_VERSION = 0;
0130 static const uint32 ROOT_PATCH_VERSION = 0;
0131 return
0132 10000 * ROOT_MAJOR_VERSION +
0133 100 * ROOT_MINOR_VERSION +
0134 ROOT_PATCH_VERSION;
0135 }
0136
0137 virtual bool synchronize(){
0138 // Synchornize a file's in-core and on-disk states.
0139 #ifdef _MSC_VER
0140 if(::_commit(m_file)) {
0141 m_out << "tools::wroot::file::synchronize :"
0142 << " in _commit() for file " << sout(m_path) << "."
0143 << std::endl;
0144 return false;
0145 }
0146 #elif defined(__MINGW32__)
0147 return true;
0148 #else
0149 if (::fsync(m_file) < 0) {
0150 m_out << "tools::wroot::file::synchronize :"
0151 << " error in fsync() for file " << sout(m_path) << "."
0152 << std::endl;
0153 return false;
0154 }
0155 #endif
0156 return true;
0157 }
0158
0159 virtual bool ziper(char a_key,compress_func& a_func) const {
0160 std::map<char,compress_func>::const_iterator it = m_zipers.find(a_key);
0161 if(it==m_zipers.end()) {
0162 a_func = 0;
0163 return false;
0164 }
0165 a_func = (*it).second;
0166 return true;
0167 }
0168 virtual uint32 compression() const {return m_compress;}
0169 virtual void compress_buffer(const buffer& a_buffer,char*& a_kbuf,uint32& a_klen,bool& a_kdel) {
0170 //NOTE : if(kdelete) delete [] kbuf;
0171
0172 a_kbuf = 0;
0173 a_klen = 0;
0174 a_kdel = false;
0175
0176 uint32 nbytes = a_buffer.length();
0177 uint32 cxlevel = m_compress;
0178 if(cxlevel && (nbytes>256)) {
0179 compress_func func;
0180 if(!ziper('Z',func)) {
0181 //m_out << "tools::wroot::directory::write_object :"
0182 // << " zlib ziper not found."
0183 // << std::endl;
0184 a_kbuf = (char*)a_buffer.buf();
0185 a_klen = a_buffer.length();
0186 a_kdel = false;
0187 } else {
0188 const uint32 kMAXBUF = 0xffffff;
0189 const uint32 HDRSIZE = 9;
0190 uint32 nbuffers = nbytes/kMAXBUF;
0191 uint32 buflen = nbytes+HDRSIZE*(nbuffers+1);
0192 a_kbuf = new char[buflen];
0193 a_kdel = true;
0194 char* src = (char*)a_buffer.buf();
0195 char* tgt = a_kbuf;
0196 uint32 nzip = 0;
0197 for(uint32 i=0;i<=nbuffers;i++) {
0198 uint32 bufmax = ((i == nbuffers) ? nbytes - nzip : kMAXBUF);
0199 uint32 nout;
0200 if(!zip(m_out,func,cxlevel,bufmax,src,bufmax,tgt,nout)) {
0201 delete [] a_kbuf;
0202 a_kbuf = (char*)a_buffer.buf();
0203 a_klen = a_buffer.length();
0204 a_kdel = false;
0205 break;
0206 }
0207 tgt += nout; //nout includes HDRSIZE
0208 a_klen += nout;
0209 src += kMAXBUF;
0210 nzip += kMAXBUF;
0211 }
0212 //::printf("debug : compress : end : %u %u\n",nbytes,klen);
0213 }
0214 } else {
0215 a_kbuf = (char*)a_buffer.buf();
0216 a_klen = a_buffer.length();
0217 a_kdel = false;
0218 }
0219 }
0220 public:
0221 file(std::ostream& a_out,const std::string& a_path,bool a_verbose = false)
0222 :m_out(a_out)
0223 ,m_path(a_path)
0224 ,m_verbose(a_verbose)
0225 ,m_file(not_open())
0226 //,m_bytes_write(0)
0227 ,m_root_directory(get_me(),nosuffix(a_path),m_title)
0228 // begin of record :
0229 ,m_version(0)
0230 ,m_BEGIN(0)
0231 ,m_END(0)
0232 ,m_seek_free(0)
0233 ,m_nbytes_free(0)
0234 ,m_nbytes_name(0)
0235 ,m_units(4)
0236 ,m_compress(1)
0237 ,m_seek_info(0)
0238 ,m_nbytes_info(0)
0239 {
0240 #ifdef TOOLS_MEM
0241 mem::increment(s_class().c_str());
0242 #endif
0243
0244 m_version = version();
0245
0246 if(access_path(m_path,kFileExists)) unlink(m_path);
0247
0248 if(!m_root_directory.is_valid()) {
0249 m_out << "tools::wroot::file::file :"
0250 << " " << sout(m_path) << " root directory badly created."
0251 << std::endl;
0252 return;
0253 }
0254
0255 m_file = _open(a_path.c_str(),
0256 #if defined(_MSC_VER) || defined(__MINGW32__)
0257 O_RDWR | O_CREAT | O_BINARY,S_IREAD | S_IWRITE
0258 #else
0259 O_RDWR | O_CREAT,0644
0260 #endif
0261 );
0262 if(m_file==not_open()) {
0263 m_out << "tools::wroot::file::file :"
0264 << " can't open " << sout(a_path) << "."
0265 << std::endl;
0266 return;
0267 }
0268
0269 //initialize :
0270
0271 m_BEGIN = kBegin(); // First used word in file following the file header.
0272 m_END = m_BEGIN; // Pointer to end of file.
0273
0274 m_free_segs.push_back(new free_seg(m_out,m_BEGIN,START_BIG_FILE()));
0275
0276 // Write Directory info :
0277 uint32 namelen =
0278 key::std_string_record_size(m_path) +
0279 key::std_string_record_size(m_title);
0280 uint32 nbytes = namelen + m_root_directory.record_size();
0281
0282 //TUUID version 1:
0283 nbytes += sizeof(unsigned int);
0284 nbytes += 2*sizeof(unsigned short);
0285 nbytes += 8*sizeof(unsigned char);
0286
0287 wroot::key key(m_out,*this,0,m_path,m_title,"TFile",nbytes); // It does a (*this).set_END().
0288
0289 // m_nbytes_name = start point of directory info from key head.
0290 m_nbytes_name = key.key_length() + namelen;
0291 m_root_directory.set_nbytes_name(m_nbytes_name);
0292 m_root_directory.set_seek_directory(key.seek_key()); //at EOF.
0293
0294 //the below write 45 bytes at BOF (Begin Of File).
0295 if(!write_header()) { //need m_nbytes_name, m_END after key written.
0296 m_out << "tools::wroot::file::file :"
0297 << " can't write file header."
0298 << std::endl;
0299 return;
0300 }
0301
0302 {char* pos = key.data_buffer();
0303 wbuf wb(m_out,byte_swap(),key.eob(),pos);
0304 if(!wb.write(m_path)) return;
0305 if(!wb.write(m_title)) return;
0306 if(!m_root_directory.to_buffer(wb)) return;
0307 //TUUID version 1:
0308 if(!wb.write((unsigned int)0)) return;
0309 if(!wb.write((unsigned short)0)) return;
0310 if(!wb.write((unsigned short)0)) return;
0311 {for(size_t count=0;count<8;count++) if(!wb.write((unsigned char)0)) return;}}
0312
0313 if(m_verbose) {
0314 m_out << "tools::wroot::file::file :"
0315 << " write key ("
0316 << namelen
0317 << ", "
0318 << m_root_directory.record_size()
0319 << ", "
0320 << nbytes
0321 << ", "
0322 << m_nbytes_name
0323 << ", "
0324 << key.seek_key()
0325 << ")."
0326 << std::endl;
0327 }
0328
0329 key.set_cycle(1);
0330 if(!key.write_self(*this)) {
0331 m_out << "tools::wroot::file::file :"
0332 << " key.write_self() failed."
0333 << std::endl;
0334 return;
0335 }
0336
0337 //the below write at kBegin + nbytes.
0338 //64+52
0339 uint32 n;
0340 if(!key.write_file(*this,n)) {
0341 m_out << "tools::wroot::file::file :"
0342 << " can't write key in file."
0343 << std::endl;
0344 return;
0345 }
0346 //::printf("debug : file::file : write key : %d\n",n);
0347
0348 }
0349 virtual ~file() {
0350 close();
0351 #ifdef TOOLS_MEM
0352 mem::decrement(s_class().c_str());
0353 #endif
0354 }
0355 protected:
0356 file(const file& a_from)
0357 :ifile(a_from)
0358 ,m_out(a_from.m_out)
0359 ,m_root_directory(get_me())
0360 {
0361 #ifdef TOOLS_MEM
0362 mem::increment(s_class().c_str());
0363 #endif
0364 }
0365 file& operator=(const file&){return *this;}
0366 public:
0367 const std::string& path() const {return m_path;}
0368
0369 void set_compression(uint32 a_level) {
0370 // level = 0 objects written to this file will not be compressed.
0371 // level = 1 minimal compression level but fast.
0372 // ....
0373 // level = 9 maximal compression level but slow.
0374 m_compress = a_level;
0375 if(m_compress>9) m_compress = 9;
0376 }
0377
0378 bool is_open() const {return (m_file==not_open()?false:true);}
0379
0380 void close() {
0381 if(m_file==not_open()) return;
0382 m_root_directory.close();
0383
0384 if(m_free_segs.size()) {
0385 if(!write_free_segments()) {
0386 m_out << "tools::wroot::file::close :"
0387 << " can't write free segments."
0388 << std::endl;
0389 }
0390 if(!write_header()) { // Now write file header
0391 m_out << "tools::wroot::file::close :"
0392 << " can't write file header."
0393 << std::endl;
0394 }
0395 }
0396
0397 {std::list<free_seg*>::iterator it;
0398 for(it=m_free_segs.begin();
0399 it!=m_free_segs.end();
0400 it = m_free_segs.erase(it)) {
0401 delete (*it);
0402 }}
0403
0404 ::close(m_file);
0405 m_file = not_open();
0406 }
0407
0408 directory& dir() {return m_root_directory;}
0409 const directory& dir() const {return m_root_directory;}
0410
0411 bool write(uint32& a_nbytes){
0412 // Write memory objects to this file :
0413 // Loop on all objects in m_root_directory (including subdirectories).
0414 // A new key is created in the directories m_keys linked list
0415 // for each object.
0416 // The list of keys is then saved on the file (via write_keys)
0417 // as a single data record.
0418 // The directory header info is rewritten on the directory header record.
0419 // //The linked list of FREE segments is written.
0420 // The file header is written (bytes 1->m_BEGIN).
0421 a_nbytes = 0;
0422
0423 if(m_verbose) {
0424 m_out << "tools::wroot::file::write :"
0425 << " writing Name=" << sout(m_path)
0426 << " Title=" << sout(m_title) << "."
0427 << std::endl;
0428 }
0429
0430 uint32 nbytes;
0431 if(!m_root_directory.write(nbytes)) return false; // Write directory tree
0432
0433 if(!write_streamer_infos()) {
0434 m_out << "tools::wroot::file::write :"
0435 << " write_streamer_infos failed."
0436 << std::endl;
0437 return false;
0438 }
0439
0440 if(!write_free_segments()) {
0441 m_out << "tools::wroot::file::write :"
0442 << " can't write free segments."
0443 << std::endl;
0444 return false;
0445 }
0446
0447 if(!write_header()) { //write 45 bytes at BOF.
0448 m_out << "tools::wroot::file::write :"
0449 << " can't write file header."
0450 << std::endl;
0451 return false;
0452 }
0453
0454 a_nbytes = nbytes;
0455 return true;
0456 }
0457
0458 bool add_ziper(char a_key,compress_func a_func){
0459 std::map<char,compress_func>::const_iterator it = m_zipers.find(a_key);
0460 if(it!=m_zipers.end()) {
0461 //(*it).second = a_func; //override ?
0462 return false;
0463 } else {
0464 m_zipers[a_key] = a_func;
0465 return true;
0466 }
0467 }
0468 protected:
0469 enum EAccessMode {
0470 kFileExists = 0,
0471 kExecutePermission = 1,
0472 kWritePermission = 2,
0473 kReadPermission = 4
0474 };
0475 static bool access_path(const std::string& a_path,EAccessMode a_mode){
0476 // Returns true if one can access a file using the specified access mode.
0477 // Mode is the same as for the WinNT access(2) function.
0478 #ifdef _MSC_VER
0479 return (::_access(a_path.c_str(),a_mode) == 0) ? true : false;
0480 #else
0481 return (::access(a_path.c_str(),a_mode) == 0) ? true : false;
0482 #endif
0483 }
0484 static bool unlink(const std::string& a_path){
0485 // Unlink, i.e. remove, a file or directory. Returns true when succesfull,
0486 // false in case of failure.
0487 struct stat finfo;
0488 if (::stat(a_path.c_str(),&finfo) < 0) return false;
0489 #ifdef _MSC_VER
0490 if (finfo.st_mode & S_IFDIR)
0491 return (::_rmdir(a_path.c_str())==-1 ? false : true);
0492 else
0493 return (::unlink(a_path.c_str())==-1 ? false : true);
0494 #else
0495 if (S_ISDIR(finfo.st_mode))
0496 return (::rmdir(a_path.c_str())==-1 ? false : true);
0497 else
0498 return (::unlink(a_path.c_str())==-1 ? false : true);
0499 #endif
0500 }
0501
0502 static int _open(const char* a_name,int a_flags,unsigned int a_mode) {
0503 #if defined(__linux__) && (__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 2)
0504 return ::open64(a_name,a_flags,a_mode);
0505 #else
0506 return ::open(a_name,a_flags,a_mode);
0507 #endif
0508 }
0509 bool write_header() {
0510 const char root[] = "root";
0511 //char psave[kBegin()];
0512 char psave[128];
0513 const char* eob = psave + kBegin();
0514 char* pos = psave;
0515 ::memcpy(pos,root,4); pos += 4;
0516 uint32 vers = m_version;
0517 if((m_END>START_BIG_FILE()) ||
0518 (m_seek_free>START_BIG_FILE()) ||
0519 (m_seek_info>START_BIG_FILE()) ){
0520 vers += 1000000;
0521 m_units = 8;
0522 }
0523 wbuf wb(m_out,byte_swap(),eob,pos);
0524 if(!wb.write(vers)) return false;
0525 if(!wb.write((seek32)m_BEGIN)) return false;
0526 if(vers>1000000) {
0527 if(!wb.write(m_END)) return false;
0528 if(!wb.write(m_seek_free)) return false;
0529 } else {
0530 if(!wb.write((seek32)m_END)) return false;
0531 if(!wb.write((seek32)m_seek_free)) return false;
0532 }
0533 if(!wb.write(m_nbytes_free)) return false;
0534 //int nfree = fFreeSegments.size();
0535 uint32 nfree = 0; //FIXME
0536 if(!wb.write(nfree)) return false;
0537 if(!wb.write(m_nbytes_name)) return false;
0538 if(!wb.write(m_units)) return false;
0539 if(!wb.write(m_compress)) return false;
0540 if(vers>1000000) {
0541 if(!wb.write(m_seek_info)) return false;
0542 } else {
0543 if(!wb.write((seek32)m_seek_info)) return false;
0544 }
0545 if(!wb.write(m_nbytes_info)) return false;
0546 if(!set_pos()) return false; //BOF
0547 uint32 nbytes = uint32(pos - psave);
0548 //::printf("debug : write_header : %d\n",nbytes);
0549 if(!write_buffer(psave,nbytes)) return false;
0550 if(!synchronize()) return false;
0551 return true;
0552 }
0553
0554 bool write_streamer_infos() {
0555 obj_list<streamer_info> sinfos;
0556 fill_infos(sinfos,m_out);
0557
0558 if(sinfos.empty()) return false;
0559
0560 buffer bref(m_out,byte_swap(),256);
0561
0562 if(!sinfos.stream(bref)) {
0563 m_out << "tools::wroot::file::write_streamer_infos :"
0564 << " cannot stream obj_list<streamer_info>."
0565 << std::endl;
0566 return false;
0567 }
0568 uint32 nbytes = bref.length();
0569
0570 wroot::key key(m_out,*this,
0571 m_root_directory.seek_directory(),
0572 "StreamerInfo","",
0573 sinfos.store_cls(),
0574 nbytes); // It does a (*this).set_END().
0575 if(!key.seek_key()) return false;
0576
0577 if(!bref.displace_mapped(key.key_length())) return false;
0578
0579 ::memcpy(key.data_buffer(),bref.buf(),nbytes);
0580
0581 //key.set_cycle(1);
0582 if(!key.write_self(*this)) {
0583 m_out << "tools::wroot::file::write_streamer_infos :"
0584 << " key.write_self() failed."
0585 << std::endl;
0586 return false;
0587 }
0588
0589 m_seek_info = key.seek_key();
0590 m_nbytes_info = key.number_of_bytes();
0591 //FIXME sumBuffer(key.objectSize());
0592
0593 uint32 n;
0594 if(!key.write_file(*this,n)) return false;
0595 if(!n) return false;
0596
0597 return true;
0598 }
0599
0600 bool make_free_seg(seek a_first,seek a_last) {
0601 // Mark unused bytes on the file :
0602 // The list of free segments is in the m_free_segs list
0603 // When an object is deleted from the file, the freed space is added
0604 // into the FREE linked list (m_free_segs). The FREE list consists
0605 // of a chain of consecutive free segments on the file. At the same
0606 // time, the first 4 bytes of the freed record on the file
0607 // are overwritten by GAPSIZE where
0608 // GAPSIZE = -(Number of bytes occupied by the record).
0609
0610 if(m_free_segs.empty()) {
0611 m_out << "tools::wroot::file::make_free_seg :"
0612 << " free_seg list should not be empty here."
0613 << std::endl;
0614 return false;
0615 }
0616
0617 free_seg* newfree = add_free(m_free_segs,a_first,a_last);
0618 if(!newfree) {
0619 m_out << "tools::wroot::file::make_free_seg :"
0620 << " add_free failed."
0621 << std::endl;
0622 return false;
0623 }
0624
0625 seek nfirst = newfree->first();
0626 seek nlast = newfree->last();
0627
0628 seek _nbytes = nlast-nfirst+1;
0629 if(_nbytes>START_BIG_FILE()) _nbytes = START_BIG_FILE();
0630 int nbytes = -int(_nbytes);
0631
0632 int nb = sizeof(int);
0633
0634 char psave[128];
0635 const char* eob = psave + nb;
0636 char* pos = psave;
0637
0638 wbuf wb(m_out,byte_swap(),eob,pos);
0639 if(!wb.write(nbytes)) return false;
0640
0641 if(nlast == (m_END-1)) m_END = nfirst;
0642 if(!set_pos(nfirst)) return false;
0643 if(!write_buffer(psave,nb)) return false;
0644 if(!synchronize()) return false;
0645 return true;
0646 }
0647
0648 bool write_free_segments(){
0649 // The linked list of FREE segments (fFree) is written as a single data record.
0650
0651 // Delete old record if it exists :
0652 if(m_seek_free){
0653 if(!make_free_seg(m_seek_free, m_seek_free + m_nbytes_free -1)) {
0654 m_out << "tools::wroot::file::write_free_segments :"
0655 << " key.write_self() failed."
0656 << std::endl;
0657 return false;
0658 }
0659 }
0660
0661 //::printf("debug : write_free_segments : seg list :\n");
0662
0663 uint32 nbytes = 0;
0664 {tools_lforcit(free_seg*,m_free_segs,it) {
0665 nbytes += (*it)->record_size();
0666 //::printf("debug : write_free_segments : %lu %lu\n",
0667 // (*it)->first(),(*it)->last());
0668 }}
0669 if(!nbytes) return true;
0670
0671 wroot::key key(m_out,*this,
0672 m_root_directory.seek_directory(),
0673 m_path,m_title,"TFile",
0674 nbytes); // It does a (*this).set_END().
0675 if(!key.seek_key()) return false;
0676
0677 {char* pos = key.data_buffer();
0678 wbuf wb(m_out,byte_swap(),key.eob(),pos);
0679 tools_lforcit(free_seg*,m_free_segs,it) {
0680 if(!(*it)->fill_buffer(wb)) return false;
0681 }}
0682
0683 //key.set_cycle(1);
0684 if(!key.write_self(*this)) {
0685 m_out << "tools::wroot::file::write_free_segments :"
0686 << " key.write_self() failed."
0687 << std::endl;
0688 return false;
0689 }
0690
0691 m_seek_free = key.seek_key();
0692 m_nbytes_free = key.number_of_bytes();
0693 if(m_verbose) {
0694 m_out << "tools::wroot::file::write_free_segments :"
0695 << " write key." << std::endl;
0696 }
0697
0698 uint32 n;
0699 if(!key.write_file(*this,n)) return false;
0700 if(!n) return false;
0701
0702 return true;
0703 }
0704
0705 static bool zip(std::ostream& a_out,
0706 compress_func a_func,
0707 int a_level,
0708 uint32 a_srcsize,char* a_src,
0709 uint32 a_tgtsize,char* a_tgt,
0710 uint32& a_irep){
0711
0712 // from Rio/Bits/R__zip using zlib.
0713
0714 const uint32 HDRSIZE = 9;
0715
0716 if(a_tgtsize<HDRSIZE) {
0717 a_out << "tools::wroot::directory::zip :"
0718 << " target buffer too small."
0719 << std::endl;
0720 a_irep = 0;
0721 return false;
0722 }
0723 if(a_srcsize>0xffffff) {
0724 a_out << "tools::wroot::directory::zip :"
0725 << " source buffer too big."
0726 << std::endl;
0727 a_irep = 0;
0728 return false;
0729 }
0730
0731 uint32 out_size;
0732 if(!a_func(a_out,a_level,
0733 a_srcsize,a_src,
0734 a_tgtsize,a_tgt+HDRSIZE,
0735 out_size)) {
0736 a_out << "tools::wroot::directory::zip :"
0737 << " zipper failed."
0738 << std::endl;
0739 a_irep = 0;
0740 return false;
0741 }
0742 if((HDRSIZE+out_size)>a_tgtsize) {
0743 a_out << "tools::wroot::directory::zip :"
0744 << " target buffer overflow."
0745 << std::endl;
0746 a_irep = 0;
0747 return false;
0748 }
0749
0750 // HEADER :
0751 a_tgt[0] = 'Z'; // Signature ZLib
0752 a_tgt[1] = 'L';
0753 a_tgt[2] = 8; //DEFLATE
0754
0755 a_tgt[3] = (char)(out_size & 0xff);
0756 a_tgt[4] = (char)((out_size >> 8) & 0xff);
0757 a_tgt[5] = (char)((out_size >> 16) & 0xff);
0758
0759 a_tgt[6] = (char)(a_srcsize & 0xff);
0760 a_tgt[7] = (char)((a_srcsize >> 8) & 0xff);
0761 a_tgt[8] = (char)((a_srcsize >> 16) & 0xff);
0762
0763 a_irep = HDRSIZE+out_size;
0764
0765 return true;
0766 }
0767
0768 #if defined(__sun) && !defined(__linux__) && (__SUNPRO_CC > 0x420)
0769 int error_number() {return ::errno;}
0770 void reset_error_number() {::errno = 0;}
0771 #else
0772 int error_number() {return errno;}
0773 void reset_error_number() {errno = 0;}
0774 #endif
0775
0776 protected:
0777 std::ostream& m_out;
0778 std::string m_path;
0779 bool m_verbose;
0780 int m_file;
0781 //uint64 m_bytes_write; //Number of bytes write in this file
0782 std::string m_title; //must be before the below.
0783 directory m_root_directory;
0784 std::map<char,compress_func> m_zipers;
0785 std::list<free_seg*> m_free_segs; //Free segments linked list table
0786 // begin of record :
0787 // "root"
0788 uint32 m_version; //File format version
0789 seek m_BEGIN; //First used byte in file
0790 seek m_END; //Last used byte in file
0791 seek m_seek_free; //Location on disk of free segments structure
0792 uint32 m_nbytes_free; //Number of bytes for free segments structure
0793 //int nfree
0794 uint32 m_nbytes_name; //Number of bytes in TNamed at creation time
0795 char m_units; //Number of bytes for file pointers
0796 uint32 m_compress; //(=1 file is compressed, 0 otherwise)
0797 seek m_seek_info; //Location on disk of StreamerInfo record
0798 uint32 m_nbytes_info; //Number of bytes for StreamerInfo record
0799 };
0800
0801
0802 }}
0803
0804 #endif
0805
0806 //doc
0807 //
0808 // A ROOT file is a suite of consecutive data records with the following
0809 // format (see also the TKey class);
0810 // TKey ---------------------
0811 // byte 1->4 Nbytes = Length of compressed object (in bytes)
0812 // 5->6 Version = TKey version identifier
0813 // 7->10 ObjLen = Length of uncompressed object
0814 // 11->14 Datime = Date and time when object was written to file
0815 // 15->16 KeyLen = Length of the key structure (in bytes)
0816 // 17->18 Cycle = Cycle of key
0817 // 19->22 SeekKey = Pointer to record itself (consistency check)
0818 // 23->26 SeekPdir = Pointer to directory header
0819 // 27->27 lname = Number of bytes in the class name
0820 // 28->.. ClassName = Object Class Name
0821 // ..->.. lname = Number of bytes in the object name
0822 // ..->.. Name = lName bytes with the name of the object
0823 // ..->.. lTitle = Number of bytes in the object title
0824 // ..->.. Title = Title of the object
0825 // -----> DATA = Data bytes associated to the object
0826 //
0827 // The first data record starts at byte fBEGIN (currently set to kBegin)
0828 // Bytes 1->kBegin contain the file description:
0829 // byte 1->4 "root" = Root file identifier
0830 // 5->8 fVersion = File format version
0831 // 9->12 fBEGIN = Pointer to first data record
0832 // 13->16 fEND = Pointer to first free word at the EOF
0833 // 17->20 fSeekFree = Pointer to FREE data record
0834 // 21->24 fNbytesFree = Number of bytes in FREE data record
0835 // 25->28 nfree = Number of free data records
0836 // 29->32 fNbytesName = Number of bytes in TNamed at creation time
0837 // 33->33 fUnits = Number of bytes for file pointers
0838 // 34->37 fCompress = Zip compression level
0839 //
