Tom Lane wrote:
is, how does the client know whether the function recognized all the
bits it passed?

How about returning the bits it could set?

int mask = PG_INITSSL | PG_INITCRYPTO;
if (!(PQinitSecure(mask) & PG_INITCRYPTO))
  ; // no support for crypto


...OR...

consider a generic PQinit call per system/object/etc..

int PQinit(int which, void *data);

int mask = PG_SECURE_SSL | PG_SECURE_CRYPTO;
PQinit(PG_INIT_SECURE, &mask); // or PG_INIT_OPENSSL

xxx_t xxx = {0, "blah", 12};
PQinit(PG_INIT_xxx, &xxx);

--
Andrew Chernow
eSilo, LLC
every bit counts
http://www.esilo.com/

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