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bug#19193: Announcing "untangle" for Grep 2.21; R.I.P. Dad
From: |
behoffski |
Subject: |
bug#19193: Announcing "untangle" for Grep 2.21; R.I.P. Dad |
Date: |
Thu, 27 Nov 2014 00:08:04 +1030 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 |
G'day,
Congratulations to all on the GNU Grep 2.21 release.
I'm continuing my attempt to do a "bottom-up" refactoring of the code to make
it more modular, via the Lua script "untangle" that you've seen recently.
This email contains an updated version of the script, tracking the changes
to the sources (especially to dfa.c) since the last release.
I've also added some code to make the modules more robust:
1. Added C++ C wrappers to the header files:
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
[... body of header goes here ... ]
#ifdef __cplusplus
}
#endif /* __cplusplus */
2. Strengthened pointer passing between modules
Although the code uses strong typing (opaque types) for pointers
representing instances created, manipulated and destroyed by
each module, there are various ways -- intentional or unintentional --
that an invalid pointer might be presented, masquerading as an
instance of the module.
To reduce the likelihood of this happening, along with adding
checking fro some other cases such as gross memory corruption, and
perhaps also use-after-free, I've added sentinel magic numbers at the
top and bottom of each of the refactored modules, and these sentinels
are checked each time an external party interacts with the module.
The charclass module has had a couple of extra additions:
"bitcount" reports how many members of the class are set; and
"next_member" allows a client to enumerate the members in an
ordered fashion.
I've tested the "untangle" script with Lua 5.1.
I haven't included the files generated by this script -- if people
are interested, I'm happy to post these to the list.
cheers,
behoffski (Brenton Hoff)
Programmer, Grouse Software
FINALLY:
RIP to my Dad, who passed away a year ago today
(27 November 2013):
He did so much to encourage my interest in science and
technology, and also personally did a lot to help me through
some tough times. Thanks Dad, for everything.
This release is dedicated to his memory.
untangle
Description: Text document
- bug#19193: Announcing "untangle" for Grep 2.21; R.I.P. Dad,
behoffski <=