Asian Characters and strchr()

[Ben Abbott]

I noticed that fileparts give an error when the full-file contains  
asian characters.

ctave:209> fileparts ("System/Library/Fonts/华文细黑.ttf")
error: subscript indices must be either positive integers or logicals.
error: called from:
error:   /Users/bpabbott/Development/mercurial/octave-3.1.53/scripts/ 
strings/strchr.m at line 40, column 19
error:   /Users/bpabbott/Development/mercurial/octave-3.1.53/scripts/ 
miscellaneous/fileparts.m at line 30, column 10

It appears that there is a simple fix for strchr, but it will depend  
upon the ascii equivalent for Asian fonts.

I'm seeing negative values.

fullfile = "System/Library/Fonts/华文细黑.ttf";
octave:211> double(fullfile)
ans =

 Columns 1 through 16:

    83   121   115   116   101   109    47    76   105    98   114     
97   114   121    47    70

 Columns 17 through 32:

   111   110   116   115    47   -27  -115  -114   -26  -106  -121    
-25   -69  -122   -23   -69

 Columns 33 through 37:

  -111    46   116   116   102

Can anyone tell me what the permissible range for integer values of  
Asian characters is?

I'm planning to patch strchr, any reason I shouldn't do that?

Ben