Question about CFF charstring parsing

[Ning Dong]

A question about CFF charstring parsing:

According to CFF Technical note #5177, cff_op_put stores a value into a transient array and cff_op_get retrieves a value from that transient array.

In function cff_decoder_parse_charstrings, that two operators are implemented just as described in #5177.

The CFF_DecoderRec_.buildchar is used as transient array and len_buildchar is the length of that array.

But buildchar and len_buildchar were not been initialized. 

Are these two storage operators never used in real world?

 

Anyone know my last question about cff_op_dup?

2009-10-13

---

Ning Dong

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[Werner LEMBERG]

> Anyone know my last question about cff_op_dup?

Please give me some time to answer; I'm abroad and have a lot of other
things to do.


    Werner


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[Werner LEMBERG]

> A question about CFF charstring parsing: According to CFF Technical
> note #5177, cff_op_put stores a value into a transient array and
> cff_op_get retrieves a value from that transient array.  In function
> cff_decoder_parse_charstrings, that two operators are implemented
> just as described in #5177.  The CFF_DecoderRec_.buildchar is used
> as transient array and len_buildchar is the length of that array.
> But buildchar and len_buildchar were not been initialized.

Oops!  Can you provide a patch?  Maybe it's necessary to map the
arbitrary index values for `put' and `get' to consecutive index values
within `buildchar', e.g.

  put index        buildchar index
     4                  1
  1234345               2
     17                 3
    ...

> Are these two storage operators never used in real world?

I don't know.


    Werner


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