Does anyone have any thoughts on this?
The plan was to have a function returning a type like:
typedef struct arrayType {
int values[4];
} arrayType;
give a Boxed object that has an array of values. Does that make sense?
Any idea on how to handle C bitfields?
I'm trudging ahead with a patch and some tests but I want some input ;)
-Steve
On Jan 4, 2010, at 9:58 AM, Steven Canfield wrote:
Hello all,
I'm new to MacRuby so please bear with me. Yesterday I was going
through the buglist and happened upon bug #280 (https://www.macruby.org/trac/ticket/280
) "NSNumber#decimalValue cant convert to ruby object". I created an
objective c file to print out the method signature and I got this:
{?=b8b4b1b1b18[8s]...@0:8
(The ? would be replaced by NSDecimal_ when in MacRuby)
The initial problem is happening inside of
RoxorCompiler::convert_type (compiler.cpp) which doesn't handle the
_C_BFLD type. Upon some further testing, it also doesn't handle the
[8S] part (array of 8 short), which is also bug #178 (https://www.macruby.org/trac/ticket/178
). So it seems like I need to add bitfield and structure array
support.
My question is, how is all of this supposed to be represented. I
assume the arrays part can just be ArrayType, while we probably want
to treat a bitfield declaration as just a regular structure, i.e.
typedef struct {
signed int _exponent:8;
unsigned int _length:4; // length == 0 && isNegative -> NaN
unsigned int _isNegative:1;
unsigned int _isCompact:1;
unsigned int _reserved:18;
unsigned short _mantissa[NSDecimalMaxSize];
} NSDecimal;
would be interpreted as
typedef struct {
signed int _exponent;
unsigned int _length; // length == 0 && isNegative -> NaN
unsigned int _isNegative;
unsigned int _isCompact;
unsigned int _reserved;
unsigned short _mantissa[NSDecimalMaxSize];
} NSDecimal;
The only problem I see with this is that we have to convert back to
NSDecimal packing on return. Maybe it would be better to have a ruby
class that provides accessors to the NSDecimal similar to Boxed (or
modify Boxed to handle this situation).
Just looking for a little bit of guidance,
-Steve
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