int cr_op()

in src/couch_quickjs/quickjs/libunicode.c [462:512]

• 48 lines of code
• 13 McCabe index (conditional complexity)

int cr_op(CharRange *cr, const uint32_t *a_pt, int a_len,
          const uint32_t *b_pt, int b_len, int op)
{
    int a_idx, b_idx, is_in;
    uint32_t v;

    a_idx = 0;
    b_idx = 0;
    for(;;) {
        /* get one more point from a or b in increasing order */
        if (a_idx < a_len && b_idx < b_len) {
            if (a_pt[a_idx] < b_pt[b_idx]) {
                goto a_add;
            } else if (a_pt[a_idx] == b_pt[b_idx]) {
                v = a_pt[a_idx];
                a_idx++;
                b_idx++;
            } else {
                goto b_add;
            }
        } else if (a_idx < a_len) {
        a_add:
            v = a_pt[a_idx++];
        } else if (b_idx < b_len) {
        b_add:
            v = b_pt[b_idx++];
        } else {
            break;
        }
        /* add the point if the in/out status changes */
        switch(op) {
        case CR_OP_UNION:
            is_in = (a_idx & 1) | (b_idx & 1);
            break;
        case CR_OP_INTER:
            is_in = (a_idx & 1) & (b_idx & 1);
            break;
        case CR_OP_XOR:
            is_in = (a_idx & 1) ^ (b_idx & 1);
            break;
        default:
            abort();
        }
        if (is_in != (cr->len & 1)) {
            if (cr_add_point(cr, v))
                return -1;
        }
    }
    cr_compress(cr);
    return 0;
}