[help-octave] Re: converting to new streampos syntax ?]

[Pascal A. Dupuis]

On Wed, Feb 04, 2004 at 11:24:49AM -0600, John W. Eaton wrote:
> | 1) tell if a stream is seekable. Old way:
> |     cur_pos = ftell(FID);  cur_pos > -1 || error('Can''t seek');
> 
> The only comparison operators that work are == and !=.
The right, backward compatible way:
cur_pos != -1 || error('my_fscanf: stream is not seekable');
> 
> | 2) push back one character onto a stream. Old way:
> |     fseek(FID, cur_pos - 1);
> 
> This should work with the current CVS sources.
It works with 2.1.53

This leaves another question open: the help and info pages don't say anything
about ftell return value. Is it something like the C counterpart, 0=succes,
non-zero = failure ?

Best regards

Pascal Dupuis

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