how do i access array within the heap?

[Evert Chin]

I had compiled a C lib into javascript code by using Emscripten. However I ran into a problem when i try to bind it with my Javascript wrapper.

I wrote this to pass it by reference, i am able to access it via the compiled lib just fine.

 

    var str_to_heapu8 = function (str) {

        return allocate(intArrayFromString(str), 'i8', ALLOC_NORMAL);

    }

However, I have trouble retrieving it back to normal javascript string... the return value is an empty string.

    var heapu8_to_str = function (ptr, len){

        var array = new Uint8Array(len);

        var i = 0;

        while( (ptr+i) < len){

            array[i] = getValue(ptr+i, 'i8');

            i++;

        }

        

        return intArrayToString(array);

    }

How can i convert it back to javascript string?e

[Alon Zakai]

See Pointer_stringify for a utility that does that.

- Alon

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[Evert Chin]

Thank you very much!

Been trying to figure out for almost 2 days!

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