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2) When using the open API I pass the address of the variable containing the file name + 2 because the variable is VARYING and the first 2 bytes contain the length. If you don't use a VARYING field then remove the "+ 2" part, but be aware that trailing blanks in a fixed-length field can be interpreted as part of the file name - hence the common use of adding a trailing null to terminate the string.
This is both incorrect and unnecessary. For a fixed-length variable, the following code is all you need:
midrange.com
fd = open(%trimr(filename): . . .)
For a VARYING variable, it's the same, except you don't need to code
%trimr():
fd = open(filename: . . .)
Notes:
-- You do not need to use %addr() or pass a pointer. In fact, if you
_do_, you'll create problems, because the automatic x'00' will no
longer be added.
-- You do not need to add x'00' manually, options(*string) adds it for
you as long as you're bright enough not to pass a pointer.
-- You do not need to add 2 to the address. Since you're not passing
a pointer, but are using the functionality of the RPG language, it
KNOWS that your field is VARYING. It KNOWS that the intended result
is a null-terminated string. It'll convert it for you.
The really frustrating part is that I've already explained this to
Emmanuel, and a day later you come and do it wrong, and convince him to do
it wrong. It's enough to make you want to chew your own foot off!
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