[liblouis-liblouisxml] Re: Python bindings and output buffer size for lou_translate*
- From: James Teh <jamie@xxxxxxxxxxxx>
- To: liblouis-liblouisxml@xxxxxxxxxxxxx
- Date: Thu, 05 Aug 2010 02:07:48 +1000
On 4/08/2010 10:33 PM, Michael Whapples wrote:
OK, on the naming, may be what you suggest is better, it was late here
when I created the patch.
That's fine. I wasn't criticising; I just think this is clearer.
There is one thing I am not fully sure of on
how you arrived at the value, the default for outlenMultiplier, its
probably long enough I just don't know where it comes from.
Well, for 16 bit unicode, the undefined character strings are in the format:
'\xnnnn'
So the 4 refers to the characters that aren't numeric (first, second,
third and final).
The maximum number of hex digits will depend on how many bytes you have
for widechar. There are two hex digits to 1 byte, so it's 2 times the
size of widechar. Thus, for 16 bit unicode:
outlenMultiplier = 4 + 2 (widechar bytes) * 2 = 8
For 32 bit:
outlenMultiplier = 4 + 4 (widechar bytes) * 2 = 12
Jamie
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