I imagine you'll have to call the Java System.out.println from C. I forget
how exactly to do this.
Java streams and ANSI/POSIX C streams aren't compatible. The C ones
usually rely on having an OS file descriptor, and Java allows making new
kinds by implementing interfaces. There's not a general way (at least not
a portable one) to get a file descriptor for a user space object.
On Fri, Feb 14, 2020 at 5:40 AM Sonny To <son.c...@gmail.com> wrote:
> here is an example of
>
>
>
>
>
>> package foo;
>>
>>
>>
>> import com.sun.jna.Library;
>>
>>
>> import com.sun.jna.Native;
>>
>>
>> import com.sun.jna.Pointer;
>>
>>
>>
>>
>>
>> public interface C extends Library {
>>
>>
>> C INSTANCE = (C) Native.load("c",C.class);
>>
>>
>>
>>
>>
>> void printf(String format, Object... args);
>>
>>
>> }
>>
>>
>
>
>
> calling this from a java main like this works as expected at the command
> line
> C.INSTANCE.printf("hello\n");
>
> but from the clojure REPL,
>
> (.printf foo.C/INSTANCE "hello "(into-array []))
>
>
> does not show anything
>
> On Friday, February 14, 2020 at 6:30:51 PM UTC+8, Sonny To wrote:
>>
>> I am using JNA to call native C code. calling native code that outputs to
>> stdout does not show up in the Clojure REPL. stdout is redirected somewhere
>> that is not attached to *out*
>>
>> How can I get stdout from native code outputting to *out* in the REPL?
>> Without this, it makes it difficult to see what went wrong in the C code.
>>
>> thanks,
>> Sonny
>>
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