[HECnet] Slightly OT - How to concatenate multi line strings in DEC COBOL

All I need is a function in C that takes a string and computes it's SHA1 hash (I've got the code for this) and returns the SHA1 hash as a string, I was thinking along the lines of int sha1hash(char *stringToHash, char *hashStringOutput); /* returns -1 if something borks, otherwise 0 */ Anyone got a nice little bit of code for: a) Wrapping that with the OpenVMS calling standard stuff in C (the strings will be passed in as descriptors etc, so I need to "unpack" them I suppose) b) An example call from COBOL to that wrapper.. Anyone? :) Sampsa On 13 Sep 2012, at 14:01, Mark Wickens wrote: On 13/09/12 01:33, Jordi Guillaumes i Pons wrote: It should be no problem. All the DEC compilers share a common ABI (VMS calling and condition handling standard). There is a manual in the "gray wall" just about that. I can't search for it now, but iirc the title is easy to pick up. Basic summary: scalars are passed by reference, strings are passed by descriptor address. VMS C provides macros to build and manage descriptors (the ASCIZ convention is fortunately not used). The HP OpenVMS Calling Standard manual I think is what you are referring to. Unfortunately I don't think it's going to help Sampsa much - I had a quick flick through and it's all low level detail, it doesn't contain any examples of calling one language from another. More of a specification of the interface for new language implementations. Mark -- http://www.wickensonline.co.uk http://declegacy.org.uk