src/MEDLoader/MEDFileUtilities.cxx

   1 // Copyright (C) 2007-2016  CEA/DEN, EDF R&D
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19 // Author : Anthony Geay (CEA/DEN)
  20
  21 #include "MEDFileUtilities.hxx"
  22 #include "MEDFileSafeCaller.txx"
  23 #include "MEDLoaderBase.hxx"
  24 #include "MEDLoader.hxx"
  25
  26 #include "InterpKernelAutoPtr.hxx"
  27
  28 #include <sstream>
  29 #include <fstream>
  30
  31 const char MEDCoupling::MEDFileWritableStandAlone::DFT_FILENAME_IN_MEM[]="DftFileNameInMemory";
  32
  33 med_access_mode MEDFileUtilities::TraduceWriteMode(int medloaderwritemode)
  34 {
  35   switch(medloaderwritemode)
  36   {
  37     case 2:
  38       return MED_ACC_CREAT;
  39     case 1:
  40       return MED_ACC_RDEXT;
  41     case 0:
  42       return MED_ACC_RDWR;
  43     default:
  44       throw INTERP_KERNEL::Exception("Invalid write mode specified ! must be 0(write with no question), 1(append) or 2(creation)");
  45   }
  46 }
  47
  48 const char *MEDFileUtilities::GetReadableMEDFieldType(med_field_type ft)
  49 {
  50   static const char medFloat64[]="MED_FLOAT64";
  51   static const char medInt32[]="MED_INT32";
  52   static const char medInt64[]="MED_INT64";
  53   switch(ft)
  54   {
  55     case MED_FLOAT64:
  56       return medFloat64;
  57     case MED_INT32:
  58       return medInt32;
  59     case MED_INT64:
  60       return medInt64;
  61     default:
  62       throw INTERP_KERNEL::Exception("Non supported field type ! Should be FLOAT64, INT32 or INT64 !");
  63   }
  64 }
  65
  66 void MEDFileUtilities::CheckMEDCode(int code, med_idt fid, const std::string& msg)
  67 {
  68   if(code<0)
  69     {
  70       std::ostringstream oss;
  71       oss << "MEDFile has returned an error code (" << code <<") : " << msg;
  72       throw INTERP_KERNEL::Exception(oss.str().c_str());
  73     }
  74 }
  75
  76 void MEDFileUtilities::CheckFileForRead(const std::string& fileName)
  77 {
  78   int status=MEDLoaderBase::getStatusOfFile(fileName);
  79   std::ostringstream oss;
  80   oss << " File : \"" << fileName << "\"";
  81   switch(status)
  82   {
  83     case MEDLoaderBase::DIR_LOCKED:
  84       {
  85         oss << " has been detected as unreadable : impossible to read anything !";
  86         throw INTERP_KERNEL::Exception(oss.str().c_str());
  87       }
  88     case MEDLoaderBase::NOT_EXIST:
  89       {
  90         oss << " has been detected as NOT EXISTING : impossible to read anything !";
  91         throw INTERP_KERNEL::Exception(oss.str().c_str());
  92       }
  93     case MEDLoaderBase::EXIST_WRONLY:
  94       {
  95         oss << " has been detected as WRITE ONLY : impossible to read anything !";
  96         throw INTERP_KERNEL::Exception(oss.str().c_str());
  97       }
  98   }
  99   AutoFid fid=MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY);
 100   if(fid<0)
 101     {
 102       oss << " has been detected as unreadable by MED file : impossible to read anything !";
 103       throw INTERP_KERNEL::Exception(oss.str().c_str());
 104     }
 105   oss << " has been detected readable but ";
 106   int major,minor,release;
 107   MEDfileNumVersionRd(fid,&major,&minor,&release);
 108   if(major<2 || (major==2 && minor<2))
 109     {
 110       oss << "version of MED file is < 2.2 : impossible to read anything !";
 111       throw INTERP_KERNEL::Exception(oss.str().c_str());
 112     }
 113 }
 114
 115 MEDFileUtilities::AutoFid::AutoFid(med_idt fid):_fid(fid)
 116 {
 117 }
 118
 119 MEDFileUtilities::AutoFid::~AutoFid()
 120 {
 121   MEDfileClose(_fid);
 122 }
 123
 124 MEDCoupling::MEDFileWritable::MEDFileWritable():_too_long_str(0),_zipconn_pol(2)
 125 {
 126 }
 127
 128 void MEDCoupling::MEDFileWritable::copyOptionsFrom(const MEDFileWritable& other) const
 129 {
 130   _too_long_str=other._too_long_str;
 131   _zipconn_pol=other._zipconn_pol;
 132 }
 133
 134 int MEDCoupling::MEDFileWritable::getTooLongStrPolicy() const
 135 {
 136   return _too_long_str;
 137 }
 138
 139 void MEDCoupling::MEDFileWritable::setTooLongStrPolicy(int newVal)
 140 {
 141   if(newVal!=2 && newVal!=1 && newVal!=0)
 142     throw INTERP_KERNEL::Exception("MEDFileWritable::setTooLongStrPolicy : invalid policy should be in 0,1 or 2 !");
 143   _too_long_str=newVal;
 144 }
 145
 146 int MEDCoupling::MEDFileWritable::getZipConnPolicy()
 147 {
 148   return _zipconn_pol;
 149 }
 150
 151 void MEDCoupling::MEDFileWritable::setZipConnPolicy(int newVal)
 152 {
 153   _zipconn_pol=newVal;
 154 }
 155
 156 std::string MEDCoupling::MEDFileWritable::FileNameFromFID(med_idt fid)
 157 {
 158   int lgth(MEDfileName(fid,0,0));
 159   if(lgth<=0)
 160     return std::string();
 161   INTERP_KERNEL::AutoPtr<char> tmp(new char[lgth+1]);
 162   if(MEDfileName(fid,tmp,lgth)<0)
 163     throw INTERP_KERNEL::Exception("MEDFileWritable::FileNameFromFID : Return code of MEDFile call \"MEDfileName\" is not >=0 as expected !");
 164   return std::string(tmp);
 165 }
 166
 167 MEDFileUtilities::AutoFid MEDCoupling::OpenMEDFileForRead(const std::string& fileName)
 168 {
 169   MEDFileUtilities::CheckFileForRead(fileName);
 170   return MEDFileUtilities::AutoFid(MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY));
 171 }
 172
 173 /*!
 174  * Writes \a this mesh into a MED file specified by its name.
 175  *  \param [in] fileName - the MED file name.
 176  *  \param [in] mode - the writing mode. For more on \a mode, see \ref AdvMEDLoaderBasics.
 177  * - 2 - erase; an existing file is removed.
 178  * - 1 - append; same data should not be present in an existing file.
 179  * - 0 - overwrite; same data present in an existing file is overwritten.
 180  *  \throw If the mesh name is not set.
 181  *  \throw If \a mode == 1 and the same data is present in an existing file.
 182  */
 183 void MEDCoupling::MEDFileWritableStandAlone::write(const std::string& fileName, int mode) const
 184 {
 185   med_access_mode medmod(MEDFileUtilities::TraduceWriteMode(mode));
 186   MEDFileUtilities::AutoFid fid(MEDfileOpen(fileName.c_str(),medmod));
 187   std::ostringstream oss; oss << "MEDFileWritableStandAlone : error on attempt to write in file : \"" << fileName << "\"";
 188   MEDFileUtilities::CheckMEDCode(fid,fid,oss.str());
 189   writeLL(fid);
 190 }
 191
 192 void MEDCoupling::MEDFileWritableStandAlone::write33(const std::string& fileName, int mode) const
 193 {
 194   med_access_mode medmod(MEDFileUtilities::TraduceWriteMode(mode));
 195 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 196 #if MED_NUM_MAJEUR>3
 197   med_bool fileexist,accessok;
 198   MEDFILESAFECALLERRD0(MEDfileExist,(fileName.c_str(),medmod,&fileexist,&accessok));
 199   if(!accessok)
 200     {
 201       std::ostringstream oss; oss << "MEDFileWritableStandAlone::write33 : requested access to file \"" << fileName << "\" !";
 202       throw INTERP_KERNEL::Exception(oss.str());
 203     }
 204   if(medmod==MED_ACC_CREAT || !fileexist)
 205     {
 206       std::ofstream ofs(fileName);
 207       ofs.write(reinterpret_cast<const char *>(EMPTY_FILE_3_3),sizeof(EMPTY_FILE_3_3));
 208       medmod=MEDFileUtilities::TraduceWriteMode(0);
 209     }
 210   MEDFileUtilities::AutoFid fid(MEDfileVersionOpen(fileName.c_str(),medmod,3,3,1));
 211   writeLL(fid);
 212 #else
 213   std::ostringstream oss; oss << "MEDFileWritableStandAlone::write33 : is implemented with MEDFile " << MEDFileVersionStr() << " ! If you need this feature please use version >= 3.2.1.";
 214   throw INTERP_KERNEL::Exception(oss.str());
 215 #endif
 216 }
 217
 218 MEDCoupling::MCAuto<MEDCoupling::DataArrayByte> MEDCoupling::MEDFileWritableStandAlone::serialize() const
 219 {
 220   med_memfile memfile=MED_MEMFILE_INIT;
 221   memfile.app_image_ptr=0;
 222   memfile.app_image_size=0;
 223   //
 224   std::string dftFileName(GenerateUniqueDftFileNameInMem());
 225   {// very important to let this braces ! The AutoFid destructor must be called, to have a "clean" memfile.app_image_ptr pointer embedded in the returned object.
 226     MEDFileUtilities::AutoFid fid(MEDmemFileOpen(dftFileName.c_str(),&memfile,MED_FALSE,MED_ACC_CREAT));
 227     writeLL(fid);
 228   }
 229   //
 230   MEDCoupling::MCAuto<MEDCoupling::DataArrayByte> ret(MEDCoupling::DataArrayByte::New());
 231   ret->useArray(reinterpret_cast<char *>(memfile.app_image_ptr),true,DeallocType::C_DEALLOC,memfile.app_image_size,1);
 232   return ret;
 233 }
 234
 235 std::string MEDCoupling::MEDFileWritableStandAlone::GenerateUniqueDftFileNameInMem()
 236 {
 237   static int ii=0;
 238   std::ostringstream oss; oss << DFT_FILENAME_IN_MEM << "_" << ii++;
 239   return oss.str();
 240 }