haste-compiler-0.5.4: lib/array.js

// Functions for dealing with arrays.

function newArr(n, x) {
    var arr = new Array(n);
    for(var i = 0; i < n; ++i) {
        arr[i] = x;
    }
    return arr;
}

// Create all views at once; perhaps it's wasteful, but it's better than having
// to check for the right view at each read or write.
function newByteArr(n) {
    // Pad the thing to multiples of 8.
    var padding = 8 - n % 8;
    if(padding < 8) {
        n += padding;
    }
    var buffer = new ArrayBuffer(n);
    var views =
        { 'i8' : new Int8Array(buffer)
        , 'i16': new Int16Array(buffer)
        , 'i32': new Int32Array(buffer)
        , 'w8' : new Uint8Array(buffer)
        , 'w16': new Uint16Array(buffer)
        , 'w32': new Uint32Array(buffer)
        , 'f32': new Float32Array(buffer)
        , 'f64': new Float64Array(buffer)
        };
    var arr =
        { 'b'  : buffer
        , 'v'  : views
        , 'off': 0
        };
    return arr;
}
window['newArr'] = newArr;
window['newByteArr'] = newByteArr;