CVS commit: src/games

["Adrian Steinmann" <ast%netbsd.org@localhost>]

Module Name:    src
Committed By:   ast
Date:           Thu Oct  2 21:36:37 UTC 2014

Modified Files:
        src/games/factor: factor.6 factor.c
        src/games/primes: Makefile pattern.c pr_tbl.c primes.6 primes.c
            primes.h
Added Files:
        src/games/primes: spsp.c

Log Message:
Imported and adapted from FreeBSD svn r272166 and r272207; this fixes
false positives for products of primes larger than 2^16. For example,
before this commit:

  $ /usr/games/primes 4295360521 4295360522
  4295360521
but
  $ /usr/games/factor 4295360521
  4295360521: 65539 65539

or
  $ /usr/games/primes 3825123056546413049 3825123056546413050
  3825123056546413049
yet
  $ /usr/games/factor 3825123056546413049
  3825123056546413049: 165479 23115459100831

or
  $ /usr/games/primes 18446744073709551577
  18446744073709551577
although
  $ /usr/games/factor 18446744073709551577
  18446744073709551577: 139646831 132095686967

Incidentally, the above examples show the smallest and largest cases that
were erroneously stated as prime in the range 2^32 .. 3825123056546413049
.. 2^64; the primes(6) program now stops at 3825123056546413050 as
primality tests on larger integers would be by brute force factorization.

In addition, special to the NetBSD version:
. for -d option, skip first difference when start is >65537 as it is incorrect
. corrected usage to mention both the existing -d as well as the new -h option

For original FreeBSD commit message by Colin Percival, see:
http://svnweb.freebsd.org/base?view=revision&revision=272166


To generate a diff of this commit:
cvs rdiff -u -r1.12 -r1.13 src/games/factor/factor.6
cvs rdiff -u -r1.26 -r1.27 src/games/factor/factor.c
cvs rdiff -u -r1.7 -r1.8 src/games/primes/Makefile src/games/primes/pr_tbl.c
cvs rdiff -u -r1.6 -r1.7 src/games/primes/pattern.c
cvs rdiff -u -r1.3 -r1.4 src/games/primes/primes.6
cvs rdiff -u -r1.19 -r1.20 src/games/primes/primes.c
cvs rdiff -u -r1.5 -r1.6 src/games/primes/primes.h
cvs rdiff -u -r0 -r1.1 src/games/primes/spsp.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.