[freetds] status and stability
Lowden, James K
LowdenJK at bernstein.com
Wed May 14 17:32:05 EDT 2003
> From: Frediano Ziglio [mailto:freddyz77 at tin.it]
> Sent: May 14, 2003 3:09 PM
> Someone accept iso8859_1 but not ISO8859_1...
> I agree to remove perl code
>> One question, though, because you seem to have an idea different from
>> When Sybase sends you its charset name "iso88597", and you're using HP
>> iconv, how are you going to locate the iconv name that HP uses?
> I use a cache. From iconv.c:
> static const char *iconv_names[sizeof(canonic_charsets) /
> Here I store iconv names relative to canonic names (same index, TODO:
> use index for canonic instead of names??).
You only write to the first four entries.
$ grep iconv_names src/tds/iconv.c \
|sed 's/^.*\(iconv_names\[.\]\).*/\1/g' \
Are you going to look up the canonical name and try each alternative until
iconv_open returns a valid descriptor?
I chose iso88597 intentionally: it's not among the first four. Sybase uses
"iso88597" for Greek; our canonical name is "ISO-8859-7". I bet HP uses
1. Sybase sends its name, "iso88597".
2. tds_canonical_charset_name returns "ISO-8859-7".
3. bytes_per_char sets the character width to 1.
4. HP iconv_open(3) rejects "ISO-8859-7". Bzzt.
/* new code needed for #5. */
5. Iterate over alternatives, caching the
first one that iconv_open() accepts.
If none are OK, put -1 in the cache, to avoid
repeated failed lookups.
Is that your idea? OK by me.
FWIW, I think a name cache is easier to understand than an index cache. I'm
glad you chose char* and not int, IOW.
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