aureooms/js-integer-little-endian

/**
 *
 * BINARY and APPLIED ON a AND b
 *
 * Meaningful only when r is a power of 2.
 *
 * |a| = |b| = |c| > 0
 *
 *
 */

export function and (a, a0, b, b0, c, c0, c1) {

    while (c0 < c1) c[c0++] = a[a0++] & b[b0++];

}


/**
 * BIG ENDIAN BINARY and APPLIED ON a AND b
 *
 * Meaningful only when r is a power of 2.
 *
 * |a| >= |b| > 0
 *
 * treats b as if it was represented with the same number of blocks as a
 */

export function band_t (r){

    var _r = r / 2;

    return function (a, a0, a1, b, b0, b1, c, c0, c1) {

        var at = a1 - b1 + b0;
        var ct = c0 + at - a0;

        if (b[b0] < _r) while (c0 < ct) c[c0++] = 0;
        else            while (c0 < ct) c[c0++] = a[a0++];

        while (c0 < c1) c[c0++] = a[at++] & b[b0++];

    };

}




/**
 * LITTLE ENDIAN BINARY and APPLIED ON a AND b
 *
 * Meaningful only when r is a power of 2.
 *
 * |a| >= |b| > 0
 *
 * treats b as if it was represented with the same number of blocks as a
 */

export function land_t (r){

    var _r = r / 2;

    return function (a, a0, a1, b, b0, b1, c, c0, c1) {

        var ct = c0 + b1 - b0;

        while (c0 < ct) c[c0++] = a[a0++] & b[b0++];

        if (b[b0 - 1] < _r) while (c0 < c1) c[c0++] = 0;
        else                while (c0 < c1) c[c0++] = a[a0++];


    };

}