XInput test

xinput_test.cpp

#include <windows.h>
#include <xinput.h>
#include <stdio.h>

// Compatibility for old XInput.h
#ifndef XUSER_MAX_COUNT
#define XUSER_MAX_COUNT 4
#endif

#pragma comment(lib, "xinput.lib")

class XiJoyStick {
    enum {
        ENTRY_MAX   = XUSER_MAX_COUNT
    };

public:
    struct Entry {
        bool            connected;
        XINPUT_STATE    xiState;
    };

    XiJoyStick() {
        memset(&entry[0], 0, sizeof(entry));
    }

    ~XiJoyStick() {
        clear();
    }

    void clear() {
    }

    void update() {
        for(int i = 0; i < ENTRY_MAX; ++i) {
            Entry* e = &entry[i];
            memset(&e->xiState, 0, sizeof(e->xiState));
            DWORD r = XInputGetState((DWORD)i, &e->xiState);
            if(r == ERROR_SUCCESS) {
                e->connected = true;
            } else {
                e->connected = false;
                if(r == ERROR_DEVICE_NOT_CONNECTED) {
                    // not connected
                } else {
                    // r : windows error (winerror.h) code
                }
            }
        }
    }

    int getEntryCount() const {
        return ENTRY_MAX;
    }

    const Entry* getEntry(int index) const {
        const Entry* e = 0;
        if(index >= 0 && index < ENTRY_MAX) {
            e = &entry[index];
        }
        return e;
    }

protected:
    Entry   entry[ENTRY_MAX];
};


int main(int, const char*) {
    XiJoyStick xjs;
    for(;;) {
        xjs.update();
        const XiJoyStick::Entry* e = xjs.getEntry(0);
        if(e && e->connected) {
            const XINPUT_GAMEPAD* xg = &e->xiState.Gamepad;
            printf("wButtons=%04x, lt=%02x, rt=%02x, l(%+6d,%+6d), r(%+6d,%+6d)\r"
                   , xg->wButtons, xg->bLeftTrigger, xg->bRightTrigger
                   , xg->sThumbLX, xg->sThumbLY, xg->sThumbRX, xg->sThumbRY
            );
        }
    }
    return 0;
}