The weights here are taken from
http://www.iupac.org/publications/pac/2003/7508/7508x1107.html
and have been rounded to four significant figures in all cases.
In the case of elements that have no isotopes stable enough for
reasonable measurement, numbers have been updated from Zumdahl,
"Chemistry", Fifth edition and are presented (as before) in parentheses.
2) Cesium is now C{a}esium
3) A number of new elements have been added at the end of the periodic
table.
Although the traditional spelling in commonwealth countries is
"Sulphur", the official IUPAC name of the element is "Sulfur", and
even the Royal Society of Chemistry now spells it "Sulfur".
- replaced direct POSIX read/write with stdio, which made the code simpler.
- added even more error checking.
- restructured the code to make each function fit on one screen
(well, except one).
- now the code reflects the intended purpose of the program.
- return 0 instead of EXIT_FAILURE on success.
The C code is a complete rewrite done by Guy Harris for 4.4BSD and is
not the original from v7 at all. Unfortunately, the data file itself,
without which the rest isn't useful, was not freed until Caldera
released all of 32v a few years ago, so it was not in 4.4lite.
The data file, the ching nroff macros, and the driver script are under
Caldera or Caldera+Berkeley copyright.
I've partially redone the driver script from 4.4 (there was no point
in using a temporary file for the hexagram), which was already
partially redone from 32v. (As an aside, it is nutty that the script
needs a copyright so many times longer than the code.)
I've renamed "cno" to "castching", "phx" to "printching", (the
traditional names were opaque), and put them in /usr/libexec/ching
instead of the v7 /usr/games/ching.d. The data file and nroff macros
are in /usr/share/games/ching
because it is initialized with values >= SCHAR_MAX. Also removed two
unnecessary bit mask operations. These changes do not affect the actual
behavior. Also replaced an "#ifdef notdef" with "#if 0". All these
changes are mainly for reducing lint(1) warnings.
