Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!amdahl!dwl10
From: dwl10@amdahl.uts.amdahl.com (Dave Lowrey)
Newsgroups: comp.sys.cbm
Subject: Re: Spinnaker C Power bugs
Message-ID: <26983@amdahl.uts.amdahl.com>
Date: 7 Apr 88 14:51:56 GMT
References: <5270@emcard.UUCP>
Reply-To: dwl10@amdahl.uts.amdahl.com (Dave Lowrey)
Organization: Amdahl Corporation, Houston TX
Lines: 57

In article <5270@emcard.UUCP> mat@emcard.UUCP (Mat Waites) writes:
>
>Hello:
>
>I've been writing a terminal program for the c64 with
>power c. (or is it c power?)
>
>Xmodem is working, but there is a problem with the file
>I/O.
>
>The first time I open a file for reading to upload it
>I can read the file fine and get EOF at the end.
>The next time I try to upload, EOF is immediately
>returned. If I exit the program and re-run it, it
>will upload the second file ok. It appears that
>the end of file status is stored internally
>and not reset on "open".
>
>Is anyone out there doing "big" program development
>with this compiler? I'd like to hear your experiences/
>problems. My terminal program is approx 1500 lines total
>broken into several files.
>
>Mat
>
>-- 
>  W Mat Waites                     |  PHONE:  (404) 727-7197
>  Emory Univ Cardiac Data Bank     |  UUCP:   ...!gatech!emcard!mat
>  Atlanta, GA 30322                |

C-Power remembers the last returned status from each I/O operation. It
is stored in an array, one element for each possible file number (stream).

Once a "non-zero" status is returned from an I/O operation, C-Power will
automatically return that status with each I/O call.
 
There are several ways out of this. The easiest (but not the most efficient),
is to close the file, and re-open it again. This can be a real pain if you
are dealing with relative files, that return EOF at the end fo EACH RECORD!
 
To fix this, I have written a pgm, using the C-assm assembler, that you call
to re-set the I/O status for a particular file to zero.
 
If you would like, I can ship you a copy.

-- 
-------------------------------------------------------------------

                  "Familiarity breeds attempt"

                          Dave Lowrey
                          Amdahl Corp.
                          Houston, Texas
                          (713)-850-8828
                         ...!{ihnp4,cbosgd,hplabs,oliveb}!amdahl!dwl10

[ The opinions expressed <may> be those of the author and not necessarily
  those of his most eminent employer. ]