Step 8 : meshes have been managed, fields still remaining.

[tools/medcoupling.git] / src / MEDLoader / MEDFileUtilities.cxx

diff --git a/src/MEDLoader/MEDFileUtilities.cxx b/src/MEDLoader/MEDFileUtilities.cxx
index 93d927a4b5dc0a9741aa70e186558b6b62ab5e7d..46354964f2f511c37c54053e887a2d5dfb3f8786 100644 (file)
--- a/src/MEDLoader/MEDFileUtilities.cxx
+++ b/src/MEDLoader/MEDFileUtilities.cxx
@@ -20,9 +20,14 @@
 
 #include "MEDFileUtilities.hxx"
 #include "MEDLoaderBase.hxx"
+#include "MEDLoader.hxx"
+
+#include "InterpKernelAutoPtr.hxx"
 
 #include <sstream>
 
+const char MEDCoupling::MEDFileWritableStandAlone::DFT_FILENAME_IN_MEM[]="DftFileNameInMemory";
+
 med_access_mode MEDFileUtilities::TraduceWriteMode(int medloaderwritemode)
 {
   switch(medloaderwritemode)
@@ -145,3 +150,75 @@ void MEDCoupling::MEDFileWritable::setZipConnPolicy(int newVal)
 {
   _zipconn_pol=newVal;
 }
+
+std::string MEDCoupling::MEDFileWritable::FileNameFromFID(med_idt fid)
+{
+  int lgth(MEDfileName(fid,0,0));
+  if(lgth<=0)
+    return std::string();
+  INTERP_KERNEL::AutoPtr<char> tmp(new char[lgth+1]);
+  if(MEDfileName(fid,tmp,lgth)<0)
+    throw INTERP_KERNEL::Exception("MEDFileWritable::FileNameFromFID : Return code of MEDFile call \"MEDfileName\" is not >=0 as expected !");
+  return std::string(tmp);
+}
+
+MEDFileUtilities::AutoFid MEDCoupling::OpenMEDFileForRead(const std::string& fileName)
+{
+  MEDFileUtilities::CheckFileForRead(fileName);
+  return MEDFileUtilities::AutoFid(MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY));
+}
+
+/*!
+ * Writes \a this mesh into a MED file specified by its name.
+ *  \param [in] fileName - the MED file name.
+ *  \param [in] mode - the writing mode. For more on \a mode, see \ref AdvMEDLoaderBasics.
+ * - 2 - erase; an existing file is removed.
+ * - 1 - append; same data should not be present in an existing file.
+ * - 0 - overwrite; same data present in an existing file is overwritten.
+ *  \throw If the mesh name is not set.
+ *  \throw If \a mode == 1 and the same data is present in an existing file.
+ */
+void MEDCoupling::MEDFileWritableStandAlone::write(const std::string& fileName, int mode) const
+{
+  med_access_mode medmod(MEDFileUtilities::TraduceWriteMode(mode));
+  MEDFileUtilities::AutoFid fid(MEDfileOpen(fileName.c_str(),medmod));
+  std::ostringstream oss; oss << "MEDFileWritableStandAlone : error on attempt to write in file : \"" << fileName << "\""; 
+  MEDFileUtilities::CheckMEDCode(fid,fid,oss.str());
+  writeLL(fid);
+}
+
+void MEDCoupling::MEDFileWritableStandAlone::write30(const std::string& fileName, int mode) const
+{
+  med_access_mode medmod(MEDFileUtilities::TraduceWriteMode(mode));
+#if MED_NUM_MAJEUR>=3 && MED_NUM_MINEUR>=2 && MED_NUM_RELEASE>=1
+  MEDFileUtilities::AutoFid fid(MEDfileVersionOpen(fileName.c_str(),medmod,3,0,0));
+  writeLL(fid);
+#else
+  std::ostringstream oss; oss << "MEDFileWritableStandAlone::write30 : is implemented with MEDFile " << MEDFileVersionStr() << " ! If you need this feature please use version >= 3.2.1.";
+  throw INTERP_KERNEL::Exception(oss.str());
+#endif
+}
+
+MEDCoupling::MCAuto<MEDCoupling::DataArrayByte> MEDCoupling::MEDFileWritableStandAlone::serialize() const
+{
+  med_memfile memfile=MED_MEMFILE_INIT;
+  memfile.app_image_ptr=0;
+  memfile.app_image_size=0;
+  //
+  std::string dftFileName(GenerateUniqueDftFileNameInMem());
+  {// 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.
+    MEDFileUtilities::AutoFid fid(MEDmemFileOpen(dftFileName.c_str(),&memfile,MED_FALSE,MED_ACC_CREAT));
+    writeLL(fid);
+  }
+  //
+  MEDCoupling::MCAuto<MEDCoupling::DataArrayByte> ret(MEDCoupling::DataArrayByte::New());
+  ret->useArray(reinterpret_cast<char *>(memfile.app_image_ptr),true,C_DEALLOC,memfile.app_image_size,1);
+  return ret;
+}
+
+std::string MEDCoupling::MEDFileWritableStandAlone::GenerateUniqueDftFileNameInMem()
+{
+  static int ii=0;
+  std::ostringstream oss; oss << DFT_FILENAME_IN_MEM << "_" << ii++;
+  return oss.str();
+}