[barcode] Problem with 128-A

[Greg Stark]

I'm using GNU Barcode to generate various forms of barcodes. I'm trying to
match pre-existing printed barcodes so the support for lots of different
formats is why I chose GNU Barcode over various other codebases since most of
the alternatives only support a handful of formats.

However I can't seem to match one of the formats, namely 128-A. The code I'm
trying to match is for "12861889" and the barcode looks exactly like what you
get from http://www.mribti.com/barcode/sample.php if you enter that number and
select 128-A.

The output of GNU Barcode for BARCODE_128 is identical to that of 128-C except
for the height of the bars.

Reading the code128.c code it seems it tries to figure out which format to use
based on the content. Is there some trick to force it to use 128-A?

-- 
greg