static_inline void bigint_mul_pow2()

in include/yyjson/yyjson.c [4166:4187]

• 22 lines of code
• 6 McCabe index (conditional complexity)

static_inline void bigint_mul_pow2(bigint *big, u32 exp) {
    u32 shft = exp % 64;
    u32 move = exp / 64;
    u32 idx = big->used;
    if (unlikely(shft == 0)) {
        for (; idx > 0; idx--) {
            big->bits[idx + move - 1] = big->bits[idx - 1];
        }
        big->used += move;
        while (move) big->bits[--move] = 0;
    } else {
        big->bits[idx] = 0;
        for (; idx > 0; idx--) {
            u64 num = big->bits[idx] << shft;
            num |= big->bits[idx - 1] >> (64 - shft);
            big->bits[idx + move] = num;
        }
        big->bits[move] = big->bits[0] << shft;
        big->used += move + (big->bits[big->used + move] > 0);
        while (move) big->bits[--move] = 0;
    }
}