bart@amiga.UUCP (Barry A. Whitebook) (09/04/86)
< eat this line - please! >
this is amiga!bart:
recent code examples posted to this net have said something to this
effect...
" under V1.2 you can do this new thing... "
followed by code which includes this type of example...
/***************** start bad example fragment *************************/
if ((FooBase = OpenLibrary("foo.library", 0)) == NULL)
{
my_go_away_and_die_routine("can't open ANY version of foo library");
}
else
{
do_1.2_thing();
my_go_away_and_die_routine("did 1.2 thing");
}
/***************** stop bad example fragment *************************/
Q: Why is this a bad thing?
A: Example doesn't check to see whether it is running under v1.2 before
doing its thing...
/***************** start better example fragment *************************/
#define V1_POINT_2 33
if ((FooBase = OpenLibrary("foo.library", V1_POINT_2)) == NULL)
{
my_go_away_and_die_routine("can't open V1.2 version of foo library");
}
else
{
do_1.2_thing();
my_go_away_and_die_routine("did 1.2 thing");
}
/***************** stop better example fragment *************************/
The bottom line: Please check that the poor user who accidentally tries
to run your software which depends on 1.2 features under V1.1 or V1.0
doesn't crash their machine.