- less efficient and less portable than using single-pass processing

Support the following expansions when they occur at the start of a
string:

    Short-form       Equivalent
    =========       ===========
      <etc>/          ~OpenFOAM/   (as per foamEtcFile)
      <case>/         $FOAM_CASE/
      <constant>/     $FOAM_CASE/constant/
      <system>/       $FOAM_CASE/system/

These can be used in fileName expansions to improve clarity and reduce
some typing

     "<constant>/reactions"   vs  "$FOAM_CASE/constant/reactions"

  ParaView 5.4 and older:
    - requires lib/paraview-X.X only

  ParaView 5.5:
    - requires lib/
    - does not appear to require lib/paraview-X.X, but retained for simplicity

- Change default version to paraview-5.5.0 for testing purposes

- this removes an OS-specific dependency (eg, drand48_r is not POSIX)
  and allows easier use of other random number generators.

  The Rand48 generator has identical behaviour and period as the
  lrand48() library routine, but holds its own seed and state
  (which makes it re-entrant) and can be combined with other
  random distributions.

  However, when using the modified form to obtain scalar values
  they will not be identical to what drand48() yields.

  This is because drand48() uses the raw 48-bit values to directly
  set the mantissa of an IEEE double where as the newer distribution
  normalizes based on the 32-bit value.

STYLE: simplify code in Random::shuffle and use Swap

- quick ignore of empty filenames.

- relocated some implementation details from POSIX.C to the
  fileStat class, where they make more sense.

- was using st_atim instead of st_mtim for the nanoseconds

- value of followLink was being ignored (it was always being followed).

This thermo is used with multiComponentMixture in rhoThermo type

keeping chocked conditions of Mach number.
This BC can work in two modes, chocked or non-chocked. In the
chocked mode the Ma is an input. In the non-chocked mode
the Ma is calculated from model inputs.

STYLE: use 'return nullptr' for empty autoPtr/tmp returns

See merge request OpenFOAM-plus!197

more consistent use of dimensioned Zero

See merge request OpenFOAM-plus!196

Feature catalyst

See merge request OpenFOAM-plus!195

- this can occur when OpenFOAM is run in serial mode, but connects to
  a program that starts/stops MPI on its own.

- makes the meaning clearer

ENH: reduce profiling overhead (issue #764)

See merge request OpenFOAM-plus!194

- avoid clockTime in favour of clockValue.

- avoid allocations when profiling is not active.

- replace hashing with manual pointer lists

Updated/modified PtrList implementation

See merge request OpenFOAM-plus!193

- in many cases can just use lookupOrDefault("key", bool) instead of
  lookupOrDefault<bool> or lookupOrDefault<Switch> since reading a
  bool from an Istream uses the Switch(Istream&) anyhow

STYLE: relocated Switch string names into file-local scope

- this is a continuation of commit ba92e752 with simpler
  template logic.

- improve internal handling to permit deriving resizable containers
  (eg, PtrDynList).

- include '->' iterator dereferencing

- Only append/set non-const autoPtr references. This doesn't break
  existing code, but makes the intention more transparent.

mattijs authored 7 years ago and Mark OLESEN committed 7 years ago

- occurred when the initial mesh distribution was missing cells on
  some processors.

- specialize transfer and swap to ensure allocated capacity isn't
  forgotten.

- both autoPtr and tmp are defined with an implicit construct from
  nullptr (but with explicit construct from a pointer to null).
  Thus is it safe to use 'nullptr' when returning an empty autoPtr or tmp.

- can assist the compiler in producing tighter code.