Function hex

server/src/server/disk_prefix_cache.cpp:27–36

// ─── Utility ────────────────────────────────────────────────────────────

static std::string hex(const uint8_t * data, int len) {
    static const char hex_chars[] = "0123456789abcdef";
    std::string out;
    out.reserve(len * 2);
    for (int i = 0; i < len; ++i) {
        out.push_back(hex_chars[data[i] >> 4]);
        out.push_back(hex_chars[data[i] & 0x0f]);
    }
    return out;
}

static bool mkdir_p(const std::string & path) {
    std::error_code ec;