Re: [CODE] calling char function from sprintf

From: Artovil (
Date: 09/05/01

At 01:49 2001-09-05 -0700, George Greer wrote:
>On Wed, 5 Sep 2001, Artovil wrote:
> Example
>char query[1000],*end;
>end = strmov(query,"INSERT INTO test_table values(");
>*end++ = '\'';
>end += mysql_real_escape_string(&mysql, end,"What's this",11);
>*end++ = '\'';
>*end++ = ',';
>*end++ = '\'';
>end += mysql_real_escape_string(&mysql, end,"binary data: \0\r\n",16);
>*end++ = '\'';
>*end++ = ')';
>if (mysql_real_query(&mysql,query,(unsigned int) (end - query)))
>    fprintf(stderr, "Failed to insert row, Error: %s\n",
>            mysql_error(&mysql));
>    The  strmov()  function  used  in the example is included in the
>mysqlclient library and works like strcpy() but returns a
>    pointer to the terminating null of the first parameter.
>You should use that function instead of trying to write your own.  You'll
>need '-lmysqlclient' to LIBS= in Makefile if you're not already using it.

I already have everything set up in the Makefile.

Well, I thought about mysql_real_escape_string() as well before I emailed,
but to structure a query that has 68 columns in that manner would take a
bzillion lines of code.  Are you sure that this is the only way to do
it?  I can't use the sprintf?

It just seems very painful.  Very very painful.

Which is best, to do the 68 column query with mysql_real_escape_string()
and have about 136 *end++='\'' and 67 *end++=',' in there, or to use 68
temporary chars and just use sprintf() to put it all together?

What does these two options do with performance and memory and all of that?

What if I had to loop something over, like player affects, and concatenated
insert strings together, and then ran that query?  Which option would be
best then?

And why is it so hard to use some kind of function inside a sprintf that
strips the ' and replaces them with \' instead?  The one I had was
obviously wrong, but you never said what was wrong with it or why, you just
said it was due to lack of understanding static.  That answer would make
sense if I actually DID understand static, but since I don't, you know
where this is all going...

I appologize for all my short-comings, and I hope that you can offer some
advice and help.

Kind regards,

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