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#ifndef _GAMEPAD_H_
#define _GAMEPAD_H_

#include <linux/joystick.h>

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <fcntl.h>
#include <vector>

#include <sigc++/functors/slot.h>
#include <sigc++/functors/ptr_fun.h>
#include <sigc++/functors/mem_fun.h>
#include <boost/shared_ptr.hpp>


class Button
{
        public:
                Button()
                {
                        value=0;
                }
                int value;
                
                sigc::slot<void, int> callback;
};

typedef boost::shared_ptr<Button> ButtonPtr;

class Gamepad
{
        public:
                typedef enum {AXIS,BUTTON} e_type;
                
                Gamepad():
                ret(0),
                fd(0),
                n_buttons(0),
                n_axes(0)
                {
                }
                
                ~Gamepad()
                {
                        close(fd);
                }
                        
                
                int startComm(const char*device)
                {
                        fd = open(device, O_RDONLY | O_NONBLOCK);
                        if(fd<0)
                        {
                                sprintf(err,"Unable to open device: %s",device);
                                return -3;
                        }
                        
                        ret=ioctl(fd, JSIOCGAXES, &n_axes);
                        if(ret<0)
                        {
                                strcpy(err,"Unable to read number of axes");
                                return -3;
                        }
                        
                        ret=ioctl(fd, JSIOCGBUTTONS, &n_buttons);
                        if(ret<0)
                        {
                                strcpy(err,"Unable to read number of buttons");
                                return -3;
                        }
                        
                        ret=ioctl(fd, JSIOCGNAME(sizeof(name)), name);
                        if(ret<0)
                                strcpy(name,"Unknown");
                        
                        printf("\33[1m\33[36mGamepad\33[0m %s\n",name);
                        
                        for(int i=0;i<n_buttons;i++)
                        {
                                ButtonPtr button(new Button);
                                buttons_.push_back(button);
                        }
                        
                        for(int i=0;i<n_axes;i++)
                        {
                                ButtonPtr button(new Button);
                                axes_.push_back(button);
                        }
                        
                        return 0;
                }

                int dispatch(bool debug=false)
                {
                        struct js_event buffer[64];
                        
                        ret = read (fd, buffer, sizeof(struct js_event)*64);
                        if(ret<0)
                                return 0;
                        
                        for(int i=0; i<ret/(signed int)sizeof(struct js_event);i++)
                        {
                                if(buffer[i].type & JS_EVENT_BUTTON & ~JS_EVENT_INIT)
                                {
                                        if(debug)printf("Button %d Value %d\n",buffer[i].number,buffer[i].value);
                                        if(buttons_[buffer[i].number]->callback.empty())
                                                continue;
                                        
                                        buttons_[buffer[i].number]->value = buffer[i].value;
                                        buttons_[buffer[i].number]->callback(buttons_[buffer[i].number]->value);
                                }else if(buffer[i].type == JS_EVENT_AXIS)
                                {
                                        if(debug)printf("Axis %d Value %d\n",buffer[i].number,buffer[i].value);
                                        if(axes_[buffer[i].number]->callback.empty())
                                                continue;
                                        
                                        axes_[buffer[i].number]->value = buffer[i].value;
                                        axes_[buffer[i].number]->callback(axes_[buffer[i].number]->value);
                                }
                        }
                        
                        return 0;
                }
                
                void plerr(int ret)
                {
                        if(ret==-1)
                        {
                                printf("Error!!   ");
                                printf("%s (raising SIGINT)\n",err);
                                raise(SIGINT);
                        }else if(ret==-2)
                        {
                                printf("Warning!! ");
                                printf("%s\n",err);
                        }else if(ret==-3)
                        {
                                printf("Error!!   ");
                                printf("%s, ",err);fflush(stdout);
                                perror(NULL);
                                raise(SIGINT);
                        }
                }
                
                
                ButtonPtr buttons(uint i)
                {
                        if(i>0 || i<buttons_.size())
                                return buttons_[i];
                        else
                        {
                                ButtonPtr empty;
                                return empty;
                        }
                }
                
                ButtonPtr axes(uint i)
                {
                        if(i>0 || i<axes_.size())
                                return axes_[i];
                        else
                        {
                                ButtonPtr empty;
                                return empty;
                        }
                }
                
        private:
                
                std::vector<ButtonPtr> buttons_;
                std::vector<ButtonPtr> axes_;
                
                int ret;
                
                int fd;
                
                int n_buttons;
                
                int n_axes;
                
                __u8 m_axes[ABS_CNT];
                __u16 m_buttons[KEY_MAX - BTN_MISC + 1];
                
                char name[1024];
                
                char err[1024];
                
                char text[1024];
};
#endif

---

atlascar_base
Author(s): Jorge Almeida, Miguel Oliveira, Pedro Salvado, Andre Oliveira and Pedro Pinheiro
autogenerated on Wed Jul 23 04:34:34 2014