[Octave-bug-tracker] [bug #34037] sscanf pads with null when reading in %#c from a string

[Ben Barrowes]

URL:
  <http://savannah.gnu.org/bugs/?34037>

                 Summary: sscanf pads with null when reading in %#c from a
string
                 Project: GNU Octave
            Submitted by: barrowes
            Submitted on: Wed 17 Aug 2011 06:28:38 PM GMT
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: Ben Barrowes
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

sscanf (and possible fscanf?) pad a character array with nulls when reading a
string with a %#c format specifier. Matlab does not pad with nulls.

This can cause problems when determining the length of a string after sscanf.

In octave:

octave:3> aa=sscanf('123456','%10c')
aa = 123456
octave:4> length(aa)
ans =  10
octave:5> double(aa)
ans =

   49   50   51   52   53   54    0    0    0    0

octave:6> 







While in matlab:

>> aa=sscanf('123456','%10c')
aa =
123456
>> length(aa)
ans =
     6
>> double(aa)
ans =
    49    50    51    52    53    54
>>  






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