newtx/scanner/scanner_const_opts.h

// scanner const attributes definitions: 
//
// Contains:    vid, pid, serial-number, ip, mac, firmware-ver, roll-life, name, family
//
// Date:        2023-12-16

#include <sane_opt_json/base_opt.h>

class scanner_const_opts : public sane_opt_provider
{
    std::string root_;
    uint32_t    hist_cnt_ = 0;
    uint32_t    roller_cnt_ = 0;

    std::string get_device_content(const char* path, bool truncate_from_lrn = false);
    std::string get_ip(void);
    std::string get_mac(void);

    void init(void);

public:
    scanner_const_opts(const char* dev_path = "/opt/cfg/usb_gadget/g1");
protected:
    ~scanner_const_opts();

public:
	// return malloc(), real data size stored in parameter 'size'. invoker should free() the returned value
	virtual char* get_value(const char* name, void* value, size_t* size, int* err = nullptr) override;
    virtual int set_value(const char* name, void* val) override;
};