CVS commit: src/games/adventure

["David A. Holland" <dholland%netbsd.org@localhost>]

Module Name:    src
Committed By:   dholland
Date:           Sat Jan  7 22:23:16 UTC 2012

Modified Files:
        src/games/adventure: save.c

Log Message:
Redo save file handling. The old save files were unportable, had no
magic number or versioning, relied on random(3) never changing to a
different implementation, and were also saving pointers to disk and
reading them back again. It *looks* as if the pointers thus loaded
were reset before being used, but it's not particularly clear as the
main loop of this thing is goto-based FORTRAN translated lightly to C.
I've changed the logic to null these pointers instead of saving and
loading them, and things seem to still work.

The new save files have a header, support versioning, write only sized
types in network byte order, and for the toy encryption to discourage
cheating do something self-contained instead of using random(3) as a
stream cipher.

Because between the original import from 4.4 until earlier today
trying to save would result in SIGSEGV on most platforms, it's
unlikely anyone has a save file, but just in case (since the pointer
issue appears to be nonlethal) I've kept compat code for old save
files.


To generate a diff of this commit:
cvs rdiff -u -r1.11 -r1.12 src/games/adventure/save.c

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