[Octave-bug-tracker] [bug #60533] some Octave functions unable to read ascii data file if D used as exponential separator

[Rik]

Update of bug #60533 (project octave):

                  Status:                    None => Confirmed              

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Follow-up Comment #2:

Localizing the problem.  dlmread calls read_value<double> which is located in
liboctave/util/lo-utils.cc.  In turn, this eventually calls read_fp_value in
the same file.  The eventual code is


        is >> val;


We are relying on the C++ stream libraries for reading "val" and those
libraries understand 'e' for exponent but not 'd' for exponent.  There might
be a way to hack the libraries in to recognizing 'd' for 'e' by making one's
own locale.  This sounds difficult though.  Otherwise, we would need to write
our own stream input routine that would read character-by-character and
assemble a number.  That is precisely what the C++ library does and it sounds
like a lot work to replicate that.

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