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  1.  Home
  2. RPG400-L
  3. October 2006

Re: "Conversion Error" when opening Stream File



I was actually referring to making it "work" on V4R5 and
up, so doing it one way for all versions.  I can set the
code page but what about machines running V5R1 and up?
There are lots of potential solutions, but I don't know enough about yoru project to recommend one. Here are thoughts:
a) Store the CCSID in the data of the file itself (assuming you can do that without fouling up another application). For example, store it in the first 2 bytes of the file. Use the open() API in binary mode, and do the translation with the iconv() API. This'll work on any release.
b) If you can't store the CCSID in the file itself, can you just "assume" that a V4R5 file will always be in a particular CCSID? So iconv() always assumes a particular CCSID, rather than looking at what the file is tagged with?
c) Perhaps always store the data in Unicode, and just use iconv() when it needs to be translated for displaying it to a user? Then the file's CCSID can be assumed to be the unicode CCSID at all times, and only the job's CCSID has to be looked up. 



what code page do I use?  I can't find a table anywhere
that has a cross reference from Code pages to CCSIDs.
Hmmm... can't a CCSID refer to more than one codepage? I didn't think it was a simple 1 to 1 mapping. Have you looked at the NLS APIs (link follows): 
http://publib.boulder.ibm.com/infocenter/iseries/v5r3/topic/apis/nls1.htm
There's an API that gets a CS/CP (character set / code page) pair from a given CCSID, and vice-versa.
There's a lot of stuff out there, but nothing that's nearly as elegant as the V5R1 support.

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