[freetds] tdsstring.c ansi alias problem
Lowden, James K
LowdenJK at bernstein.com
Mon May 5 11:34:36 EDT 2003
> From: Craig A. Berry [mailto:craigberry at mac.com]
> Sent: May 4, 2003 11:26 PM
> which uses the type "pointer to struct DSTR_CHAR".
> tds_dstr_set(DSTR * s, char *src)
> if (*(char **) s != tds_str_empty)
> free(*(char **) s);
> *(char **) s = src;
> return *s;
> I guess I don't understand the purpose of casting the
> left-hand side of "*(char **) s = src;"
Where is DSTR_CHAR defined? I find only a forward declaration in tds.h.
I've looked in unixodbc and on my Win32 box:
$ grep DSTR_CHAR include/* src/*/*.c win32/*
include/tds.h:typedef struct DSTR_CHAR *DSTR;
I can't even explain how the above compiles. That doesn't prevent me from
thinking it's ugly, and afaik "free(*(char **) s);" is identical to
"free(s);" in all cases, as far as the compiler and free store are
There must be a better way to do this than casting the living daylights out
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