static RAPIDJSON_FORCEINLINE void SkipUnescapedString()

in src/main/cpp/sdk/common/rapidjson/reader.h [1347:1390]
36 lines of code
8 McCabe index (conditional complexity)

    static RAPIDJSON_FORCEINLINE void SkipUnescapedString(InsituStringStream& is) {
        RAPIDJSON_ASSERT(is.src_ == is.dst_);
        char* p = is.src_;

        // Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
        const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
        for (; p != nextAligned; p++)
            if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
                is.src_ = is.dst_ = p;
                return;
            }

        // The rest of string using SIMD
        const uint8x16_t s0 = vmovq_n_u8('"');
        const uint8x16_t s1 = vmovq_n_u8('\\');
        const uint8x16_t s2 = vmovq_n_u8('\b');
        const uint8x16_t s3 = vmovq_n_u8(32);

        for (;; p += 16) {
            const uint8x16_t s = vld1q_u8(reinterpret_cast<uint8_t *>(p));
            uint8x16_t x = vceqq_u8(s, s0);
            x = vorrq_u8(x, vceqq_u8(s, s1));
            x = vorrq_u8(x, vceqq_u8(s, s2));
            x = vorrq_u8(x, vcltq_u8(s, s3));

            x = vrev64q_u8(x);                     // Rev in 64
            uint64_t low = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 0);   // extract
            uint64_t high = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 1);  // extract

            if (low == 0) {
                if (high != 0) {
                    int lz = __builtin_clzll(high);
                    p += 8 + (lz >> 3);
                    break;
                }
            } else {
                int lz = __builtin_clzll(low);
                p += lz >> 3;
                break;
            }
        }

        is.src_ = is.dst_ = p;
    }