[ft-devel] Question about CFF arithmetic operator dup

[Ning Dong]

Hi,

 

I'm checking the cff_decoder_parse_charstrings function in cffgload.c of FT239.

 

According to CFF technical note #5177, operator "dup" should consume one element and put two elements to arguement stack:

dup     any dup(12 27) any any

 

But in cff_decoder_parse_charstrings, the codes like this:

        case cff_op_dup:

          FT_TRACE4(( " dup\n" ));

          args[1] = args[0];

          args++;                //should be args+=2?

          break;

Only one element put to arguement stack.

 

Is this a bug?

FT2310 is the same.

2009-10-09

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Ning Dong