On Wed, Oct 19, 2016 at 12:54 PM, Kyle Kotowick <[email protected]> wrote:
> Aha, that fixed it!
>
> I'm running into one issue though. What do I do with the data when it's a
> "Float16" type? C++ has no way to represent a 16-bit float, so I'm having
> difficulty converting it to a regular 32-bit float.
>
Find a compiler / library that supports it? ;-p
I'm only half joking. You can always just keep a pointer to the value or
store it in a int16_t as long as you don't need to do any operation on it.
If you want to operate on them in C++ natively you would have to find a
C/C++ compiler/library (or write the necessary operations yourself) that
supports __fp16.
>
> jl_value_t *ret = jl_eval_string(code_string);
> jl_array_t *ret_array = (jl_array_t*)ret;
>
> if (jl_array_eltype(ret) == jl_float16_type) {
>
> /* now I need to convert the 'ret_array' to a C++ array of floats, but
> how do I do that when they're given in Float16? */
>
> }
>
>
> On Tuesday, 18 October 2016 20:57:10 UTC-4, Isaiah wrote:
>>
>> The issue here is that `jl_array_eltype` is already returning a type.
>>
>> `jl_typeis(v, t)` becomes `jl_typeof(v) == t`, so your checks become:
>>
>> jl_typeof(array_type) == jl_int64_type
>>
>> But
>>
>> jl_typeof(array_type) -> DataType
>>
>> Instead, either do the equality check directly:
>>
>> array_type == jl_int64_type
>>
>> Or use the exported API only (jlapi.c):
>>
>> strcmp(jl_typename_str(array_type), jl_typename_str(jl_int64_type))
>>
>> On Tue, Oct 18, 2016 at 7:52 PM, Kyle Kotowick <[email protected]> wrote:
>>
>>> I apologize for the formatting, that should be:
>>>
>>> jl_value_t *ret = jl_eval_string(code_string);
>>> void* array_type = jl_array_eltype(ret);
>>> jl_array_t *ret_array = (jl_array_t*)ret;
>>>
>>> if (jl_typeis(array_type, jl_int64_type)) {
>>> long *data = (long*) jl_array_data(ret_array);
>>> }
>>> else if (jl_typeis(array_type, jl_float64_type)) {
>>> double *data = (double*) jl_array_data(ret_array);
>>> }
>>>
>>>
>>> And the issue is that even if it is an Int64 or Float64, neither of
>>> those IF statements will return true.
>>>
>>>
>>>
>>> On Sunday, 16 October 2016 21:36:03 UTC-4, Kyle Kotowick wrote:
>>>>
>>>> Awesome, thanks. Could you show how to use it in a minimal code
>>>> example? Here's what I'm currently trying, but it does not appear to be
>>>> working:
>>>>
>>>> jl_value_t *ret = jl_eval_string(code_string);
>>>> void* array_type = jl_array_eltype(ret);
>>>> jl_array_t *ret_array = (jl_array_t*)ret;
>>>>
>>>>
>>>>
>>>> if (jl_typeis(array_type, jl_int64_type)) {
>>>> long *data = (long*) jl_array_data(ret_array);
>>>> }
>>>> else if (jl_typeis(array_type, jl_float64_type)) { double *data = (
>>>> double*) jl_array_data(ret_array);
>>>> }
>>>>
>>>>
>>>> On Friday, 14 October 2016 20:45:18 UTC-4, Isaiah wrote:
>>>>>
>>>>> On Fri, Oct 14, 2016 at 2:28 PM, Kyle Kotowick <[email protected]>
>>>>> wrote:
>>>>>>
>>>>>>
>>>>>> After determining that an array was returned, how would you determine
>>>>>> what the inner type of the array is (i.e. the type of the objects it
>>>>>> contains)?
>>>>>>
>>>>>
>>>>> `jl_array_eltype`
>>>>>
>>>>>
>>>>>>
>>>>>> And furthermore, if it returns an array of type "Any", would there be
>>>>>> any way to tell what the type is of any arbitrary element in that array?
>>>>>>
>>>>>
>>>>> `jl_typeof`, after retrieving the element (which will be boxed)
>>>>>
>>>>>
>>>>>>
>>>>>> Thanks!
>>>>>>
>>>>>
>>>>>
>>
