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freetds - Re: [freetds] SQLGetData() returns len 4095 for empty TEXT on AIX 6.1 without ClientCharset defined

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  • From: Sebastien FLAESCH <sf AT 4js.com>
  • To: FreeTDS Development Group <freetds AT lists.ibiblio.org>
  • Subject: Re: [freetds] SQLGetData() returns len 4095 for empty TEXT on AIX 6.1 without ClientCharset defined
  • Date: Fri, 05 Apr 2013 08:57:47 +0200

Great!

I will test the last version...

Keep in mind my remark about invalid iconv names. During my tests, I saw
that an invalid ClientCharset value was just ignored. By mistake I used
a system locale (LANG/LC_ALL) name instead of an iconv charset name...

If iconv cannot initialize properly, freetds lib should stop with an error.

Seb

On 04/04/2013 10:21 PM, Frediano Ziglio wrote:
Fix in git repository. Also fixed problem with AIX and SQLPutData with 0
bytes.

Frediano


2013/4/4 Frediano Ziglio<freddy77 AT gmail.com>

Found!

Actually the problem is in iconv AIX implementation, iconv is a function
like

size_t iconv(iconv_t cd,
char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft);

if *inbuf is NULL and *inbytesleft is 0 AIX threat input as an infinite
buffer with zeroes so it convert an empty string (cause for libTDS view is
an empty string) to a set of zeroes (actually up to the output buffer which
is 4095 if you take into account space for terminator).

The simpler fix is to test and assume empty string if *inbytesleft == 0 in
tds_iconv.

Frediano



2013/4/2 Sebastien FLAESCH<sf AT 4js.com>

Ok thanks.
We'll setup one of our AIX machines to give you access.
Seb

On 03/30/2013 04:24 PM, Frediano Ziglio wrote:
Can I have access to one of the AIX machines ??

I'm currently on holidays, I'll be back on Thursday.

Frediano


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