ENH: direct access to wrapped ifstream/ofstream with compression (#1805)
- previously hidden as Detail::[IO]FstreamAllocator, now exposed directly as [io]fstreamPointer, which allows reuse for std::ifstream, std::ofstream wrapping, without the additional ISstream, OSstream layers. These stream pointers have some characteristics similar to a unique_ptr. - restrict direct gzstream usage to two files (fstreamPointers.C, gzstream.C) which improves localization and makes it simpler to enable/disable with the `HAVE_LIBZ` define. The HAVE_LIBZ define is currently simply hard-coded in the Make/options. If compiled WITHOUT libz support: - reading gz files : FatalError - writing gz files : emit warning and downgrade to uncompressed - warn if compression is specified in the case controlDict and downgrade to uncompressed ENH: minor updates to gzstream interface for C++11 - support construct/open with std::string for the file names. CONFIG: provisioning for have_libz detect...
Showing with 949 additions and 343 deletions