Use a for() loop from position n to start of field until a non space is found.
Eg:
Field read is 120 bytes with blanks added to end of field.
For(i = 119; i > 0; i--) {
New_string[i] = (read_field[i] != ' ') ? '\0' : read_field[i];
If(read_field[i] != ' ')
break;
}
If the field is NULL terminated when written then this would not be necessary, just use strcpy(new_field,read_field);
There are no API's or anything else to look for the length of a character array to a string automatically, you can using the above come up with one of your own.
Another option would be to have a separate field that stores the string length when written.
Chris...
-----Original Message-----
From: C400-L <c400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Patrik Schindler
Sent: June 4, 2021 8:02 AM
To: Bare Metal Programming IBM i (AS/400 and iSeries) <c400-l@xxxxxxxxxxxxxxxxxx>
Subject: [C400-L] Fixed-Length strings vs. NUL-terminated strings
Hello,
reading from a database table (declared with fixed length strings for easier handling in RPG for green screen use) with the _R API calls returns fixed length strings, filled with spaces until the space is exhausted.
Do I need to come up with a hand crafted function to "convert" these to C-style strings, or does IBM i provide an API for achieving this? By "conversion" I want to point out that I don't care if that function just places a NUL on the proper position's original buffer, or the string gets just copied and the copy is treated accordingly.
My Google searches yield a lot of unrelated information, because the question seems rather generic. The IBM API finder list yielded no usable results by searches for string, fixed or NUL.
Thanks for your hints!
:wq! PoC
--
This is the Bare Metal Programming IBM i (AS/400 and iSeries) (C400-L) mailing list To post a message email: C400-L@xxxxxxxxxxxxxxxxxx To subscribe, unsubscribe, or change list options,
visit:
https://lists.midrange.com/mailman/listinfo/c400-l
or email: C400-L-request@xxxxxxxxxxxxxxxxxx Before posting, please take a moment to review the archives at
https://archive.midrange.com/c400-l.
Help support midrange.com by shopping at amazon.com with our affiliate
link:
https://amazon.midrange.com
midrange.com
