/*********************************************************************
 *
 *  $Id: svn_id $
 *
 *  Implements yFindAnButton(), the high-level API for AnButton functions
 *
 *  - - - - - - - - - License information: - - - - - - - - -
 *
 *  Copyright (C) 2011 and beyond by Yoctopuce Sarl, Switzerland.
 *
 *  Yoctopuce Sarl (hereafter Licensor) grants to you a perpetual
 *  non-exclusive license to use, modify, copy and integrate this
 *  file into your software for the sole purpose of interfacing
 *  with Yoctopuce products.
 *
 *  You may reproduce and distribute copies of this file in
 *  source or object form, as long as the sole purpose of this
 *  code is to interface with Yoctopuce products. You must retain
 *  this notice in the distributed source file.
 *
 *  You should refer to Yoctopuce General Terms and Conditions
 *  for additional information regarding your rights and
 *  obligations.
 *
 *  THE SOFTWARE AND DOCUMENTATION ARE PROVIDED 'AS IS' WITHOUT
 *  WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
 *  WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS
 *  FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO
 *  EVENT SHALL LICENSOR BE LIABLE FOR ANY INCIDENTAL, SPECIAL,
 *  INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
 *  COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR
 *  SERVICES, ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT
 *  LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
 *  CONTRIBUTION, OR OTHER SIMILAR COSTS, WHETHER ASSERTED ON THE
 *  BASIS OF CONTRACT, TORT (INCLUDING NEGLIGENCE), BREACH OF
 *  WARRANTY, OR OTHERWISE.
 *
 *********************************************************************/


#define _CRT_SECURE_NO_DEPRECATE //do not use windows secure crt
#include <string.h>
#include <stdio.h>
#include <math.h>
#include <stdlib.h>

#include "yocto_anbutton.h"
#include "yapi/yjson.h"
#include "yapi/yapi.h"
#define  __FILE_ID__  "anbutton"

#ifdef YOCTOLIB_NAMESPACE
using namespace YOCTOLIB_NAMESPACE;
#endif

YAnButton::YAnButton(const string& func): YFunction(func)
//--- (YAnButton initialization)
    ,_calibratedValue(CALIBRATEDVALUE_INVALID)
    ,_rawValue(RAWVALUE_INVALID)
    ,_analogCalibration(ANALOGCALIBRATION_INVALID)
    ,_calibrationMax(CALIBRATIONMAX_INVALID)
    ,_calibrationMin(CALIBRATIONMIN_INVALID)
    ,_sensitivity(SENSITIVITY_INVALID)
    ,_isPressed(ISPRESSED_INVALID)
    ,_lastTimePressed(LASTTIMEPRESSED_INVALID)
    ,_lastTimeReleased(LASTTIMERELEASED_INVALID)
    ,_pulseCounter(PULSECOUNTER_INVALID)
    ,_pulseTimer(PULSETIMER_INVALID)
    ,_inputType(INPUTTYPE_INVALID)
    ,_valueCallbackAnButton(NULL)
//--- (end of YAnButton initialization)
{
    _className="AnButton";
}

YAnButton::~YAnButton()
{
//--- (YAnButton cleanup)
//--- (end of YAnButton cleanup)
}
//--- (YAnButton implementation)
// static attributes

int YAnButton::_parseAttr(YJSONObject *json_val)
{
    if(json_val->has("calibratedValue")) {
        _calibratedValue =  json_val->getInt("calibratedValue");
    }
    if(json_val->has("rawValue")) {
        _rawValue =  json_val->getInt("rawValue");
    }
    if(json_val->has("analogCalibration")) {
        _analogCalibration =  (Y_ANALOGCALIBRATION_enum)json_val->getInt("analogCalibration");
    }
    if(json_val->has("calibrationMax")) {
        _calibrationMax =  json_val->getInt("calibrationMax");
    }
    if(json_val->has("calibrationMin")) {
        _calibrationMin =  json_val->getInt("calibrationMin");
    }
    if(json_val->has("sensitivity")) {
        _sensitivity =  json_val->getInt("sensitivity");
    }
    if(json_val->has("isPressed")) {
        _isPressed =  (Y_ISPRESSED_enum)json_val->getInt("isPressed");
    }
    if(json_val->has("lastTimePressed")) {
        _lastTimePressed =  json_val->getLong("lastTimePressed");
    }
    if(json_val->has("lastTimeReleased")) {
        _lastTimeReleased =  json_val->getLong("lastTimeReleased");
    }
    if(json_val->has("pulseCounter")) {
        _pulseCounter =  json_val->getLong("pulseCounter");
    }
    if(json_val->has("pulseTimer")) {
        _pulseTimer =  json_val->getLong("pulseTimer");
    }
    if(json_val->has("inputType")) {
        _inputType =  (Y_INPUTTYPE_enum)json_val->getInt("inputType");
    }
    return YFunction::_parseAttr(json_val);
}


/**
 * Returns the current calibrated input value (between 0 and 1000, included).
 *
 * @return an integer corresponding to the current calibrated input value (between 0 and 1000, included)
 *
 * On failure, throws an exception or returns YAnButton::CALIBRATEDVALUE_INVALID.
 */
int YAnButton::get_calibratedValue(void)
{
    int res = 0;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::CALIBRATEDVALUE_INVALID;
                }
            }
        }
        res = _calibratedValue;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Returns the current measured input value as-is (between 0 and 4095, included).
 *
 * @return an integer corresponding to the current measured input value as-is (between 0 and 4095, included)
 *
 * On failure, throws an exception or returns YAnButton::RAWVALUE_INVALID.
 */
int YAnButton::get_rawValue(void)
{
    int res = 0;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::RAWVALUE_INVALID;
                }
            }
        }
        res = _rawValue;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Tells if a calibration process is currently ongoing.
 *
 * @return either YAnButton::ANALOGCALIBRATION_OFF or YAnButton::ANALOGCALIBRATION_ON
 *
 * On failure, throws an exception or returns YAnButton::ANALOGCALIBRATION_INVALID.
 */
Y_ANALOGCALIBRATION_enum YAnButton::get_analogCalibration(void)
{
    Y_ANALOGCALIBRATION_enum res;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::ANALOGCALIBRATION_INVALID;
                }
            }
        }
        res = _analogCalibration;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Starts or stops the calibration process. Remember to call the saveToFlash()
 * method of the module at the end of the calibration if the modification must be kept.
 *
 * @param newval : either YAnButton::ANALOGCALIBRATION_OFF or YAnButton::ANALOGCALIBRATION_ON
 *
 * @return YAPI::SUCCESS if the call succeeds.
 *
 * On failure, throws an exception or returns a negative error code.
 */
int YAnButton::set_analogCalibration(Y_ANALOGCALIBRATION_enum newval)
{
    string rest_val;
    int res;
    yEnterCriticalSection(&_this_cs);
    try {
        rest_val = (newval>0 ? "1" : "0");
        res = _setAttr("analogCalibration", rest_val);
    } catch (std::exception &) {
         yLeaveCriticalSection(&_this_cs);
         throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Returns the maximal value measured during the calibration (between 0 and 4095, included).
 *
 * @return an integer corresponding to the maximal value measured during the calibration (between 0
 * and 4095, included)
 *
 * On failure, throws an exception or returns YAnButton::CALIBRATIONMAX_INVALID.
 */
int YAnButton::get_calibrationMax(void)
{
    int res = 0;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::CALIBRATIONMAX_INVALID;
                }
            }
        }
        res = _calibrationMax;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Changes the maximal calibration value for the input (between 0 and 4095, included), without actually
 * starting the automated calibration.  Remember to call the saveToFlash()
 * method of the module if the modification must be kept.
 *
 * @param newval : an integer corresponding to the maximal calibration value for the input (between 0
 * and 4095, included), without actually
 *         starting the automated calibration
 *
 * @return YAPI::SUCCESS if the call succeeds.
 *
 * On failure, throws an exception or returns a negative error code.
 */
int YAnButton::set_calibrationMax(int newval)
{
    string rest_val;
    int res;
    yEnterCriticalSection(&_this_cs);
    try {
        char buf[32]; SAFE_SPRINTF(buf, 32, "%d", newval); rest_val = string(buf);
        res = _setAttr("calibrationMax", rest_val);
    } catch (std::exception &) {
         yLeaveCriticalSection(&_this_cs);
         throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Returns the minimal value measured during the calibration (between 0 and 4095, included).
 *
 * @return an integer corresponding to the minimal value measured during the calibration (between 0
 * and 4095, included)
 *
 * On failure, throws an exception or returns YAnButton::CALIBRATIONMIN_INVALID.
 */
int YAnButton::get_calibrationMin(void)
{
    int res = 0;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::CALIBRATIONMIN_INVALID;
                }
            }
        }
        res = _calibrationMin;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Changes the minimal calibration value for the input (between 0 and 4095, included), without actually
 * starting the automated calibration.  Remember to call the saveToFlash()
 * method of the module if the modification must be kept.
 *
 * @param newval : an integer corresponding to the minimal calibration value for the input (between 0
 * and 4095, included), without actually
 *         starting the automated calibration
 *
 * @return YAPI::SUCCESS if the call succeeds.
 *
 * On failure, throws an exception or returns a negative error code.
 */
int YAnButton::set_calibrationMin(int newval)
{
    string rest_val;
    int res;
    yEnterCriticalSection(&_this_cs);
    try {
        char buf[32]; SAFE_SPRINTF(buf, 32, "%d", newval); rest_val = string(buf);
        res = _setAttr("calibrationMin", rest_val);
    } catch (std::exception &) {
         yLeaveCriticalSection(&_this_cs);
         throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Returns the sensibility for the input (between 1 and 1000) for triggering user callbacks.
 *
 * @return an integer corresponding to the sensibility for the input (between 1 and 1000) for
 * triggering user callbacks
 *
 * On failure, throws an exception or returns YAnButton::SENSITIVITY_INVALID.
 */
int YAnButton::get_sensitivity(void)
{
    int res = 0;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::SENSITIVITY_INVALID;
                }
            }
        }
        res = _sensitivity;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Changes the sensibility for the input (between 1 and 1000) for triggering user callbacks.
 * The sensibility is used to filter variations around a fixed value, but does not preclude the
 * transmission of events when the input value evolves constantly in the same direction.
 * Special case: when the value 1000 is used, the callback will only be thrown when the logical state
 * of the input switches from pressed to released and back.
 * Remember to call the saveToFlash() method of the module if the modification must be kept.
 *
 * @param newval : an integer corresponding to the sensibility for the input (between 1 and 1000) for
 * triggering user callbacks
 *
 * @return YAPI::SUCCESS if the call succeeds.
 *
 * On failure, throws an exception or returns a negative error code.
 */
int YAnButton::set_sensitivity(int newval)
{
    string rest_val;
    int res;
    yEnterCriticalSection(&_this_cs);
    try {
        char buf[32]; SAFE_SPRINTF(buf, 32, "%d", newval); rest_val = string(buf);
        res = _setAttr("sensitivity", rest_val);
    } catch (std::exception &) {
         yLeaveCriticalSection(&_this_cs);
         throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Returns true if the input (considered as binary) is active (closed contact), and false otherwise.
 *
 * @return either YAnButton::ISPRESSED_FALSE or YAnButton::ISPRESSED_TRUE, according to true if the
 * input (considered as binary) is active (closed contact), and false otherwise
 *
 * On failure, throws an exception or returns YAnButton::ISPRESSED_INVALID.
 */
Y_ISPRESSED_enum YAnButton::get_isPressed(void)
{
    Y_ISPRESSED_enum res;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::ISPRESSED_INVALID;
                }
            }
        }
        res = _isPressed;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Returns the number of elapsed milliseconds between the module power on and the last time
 * the input button was pressed (the input contact transitioned from open to closed).
 *
 * @return an integer corresponding to the number of elapsed milliseconds between the module power on
 * and the last time
 *         the input button was pressed (the input contact transitioned from open to closed)
 *
 * On failure, throws an exception or returns YAnButton::LASTTIMEPRESSED_INVALID.
 */
s64 YAnButton::get_lastTimePressed(void)
{
    s64 res = 0;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::LASTTIMEPRESSED_INVALID;
                }
            }
        }
        res = _lastTimePressed;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Returns the number of elapsed milliseconds between the module power on and the last time
 * the input button was released (the input contact transitioned from closed to open).
 *
 * @return an integer corresponding to the number of elapsed milliseconds between the module power on
 * and the last time
 *         the input button was released (the input contact transitioned from closed to open)
 *
 * On failure, throws an exception or returns YAnButton::LASTTIMERELEASED_INVALID.
 */
s64 YAnButton::get_lastTimeReleased(void)
{
    s64 res = 0;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::LASTTIMERELEASED_INVALID;
                }
            }
        }
        res = _lastTimeReleased;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Returns the pulse counter value. The value is a 32 bit integer. In case
 * of overflow (>=2^32), the counter will wrap. To reset the counter, just
 * call the resetCounter() method.
 *
 * @return an integer corresponding to the pulse counter value
 *
 * On failure, throws an exception or returns YAnButton::PULSECOUNTER_INVALID.
 */
s64 YAnButton::get_pulseCounter(void)
{
    s64 res = 0;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::PULSECOUNTER_INVALID;
                }
            }
        }
        res = _pulseCounter;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

int YAnButton::set_pulseCounter(s64 newval)
{
    string rest_val;
    int res;
    yEnterCriticalSection(&_this_cs);
    try {
        char buf[32]; SAFE_SPRINTF(buf, 32, "%u", (u32)newval); rest_val = string(buf);
        res = _setAttr("pulseCounter", rest_val);
    } catch (std::exception &) {
         yLeaveCriticalSection(&_this_cs);
         throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Returns the timer of the pulses counter (ms).
 *
 * @return an integer corresponding to the timer of the pulses counter (ms)
 *
 * On failure, throws an exception or returns YAnButton::PULSETIMER_INVALID.
 */
s64 YAnButton::get_pulseTimer(void)
{
    s64 res = 0;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::PULSETIMER_INVALID;
                }
            }
        }
        res = _pulseTimer;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Returns the decoding method applied to the input (analog or multiplexed binary switches).
 *
 * @return a value among YAnButton::INPUTTYPE_ANALOG_FAST, YAnButton::INPUTTYPE_DIGITAL4,
 * YAnButton::INPUTTYPE_ANALOG_SMOOTH and YAnButton::INPUTTYPE_DIGITAL_FAST corresponding to the
 * decoding method applied to the input (analog or multiplexed binary switches)
 *
 * On failure, throws an exception or returns YAnButton::INPUTTYPE_INVALID.
 */
Y_INPUTTYPE_enum YAnButton::get_inputType(void)
{
    Y_INPUTTYPE_enum res;
    yEnterCriticalSection(&_this_cs);
    try {
        if (_cacheExpiration <= YAPI::GetTickCount()) {
            if (this->_load_unsafe(YAPI::_yapiContext.GetCacheValidity()) != YAPI_SUCCESS) {
                {
                    yLeaveCriticalSection(&_this_cs);
                    return YAnButton::INPUTTYPE_INVALID;
                }
            }
        }
        res = _inputType;
    } catch (std::exception &) {
        yLeaveCriticalSection(&_this_cs);
        throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Changes the decoding method applied to the input (analog or multiplexed binary switches).
 * Remember to call the saveToFlash() method of the module if the modification must be kept.
 *
 * @param newval : a value among YAnButton::INPUTTYPE_ANALOG_FAST, YAnButton::INPUTTYPE_DIGITAL4,
 * YAnButton::INPUTTYPE_ANALOG_SMOOTH and YAnButton::INPUTTYPE_DIGITAL_FAST corresponding to the
 * decoding method applied to the input (analog or multiplexed binary switches)
 *
 * @return YAPI::SUCCESS if the call succeeds.
 *
 * On failure, throws an exception or returns a negative error code.
 */
int YAnButton::set_inputType(Y_INPUTTYPE_enum newval)
{
    string rest_val;
    int res;
    yEnterCriticalSection(&_this_cs);
    try {
        char buf[32]; SAFE_SPRINTF(buf, 32, "%d", newval); rest_val = string(buf);
        res = _setAttr("inputType", rest_val);
    } catch (std::exception &) {
         yLeaveCriticalSection(&_this_cs);
         throw;
    }
    yLeaveCriticalSection(&_this_cs);
    return res;
}

/**
 * Retrieves an analog input for a given identifier.
 * The identifier can be specified using several formats:
 *
 * - FunctionLogicalName
 * - ModuleSerialNumber.FunctionIdentifier
 * - ModuleSerialNumber.FunctionLogicalName
 * - ModuleLogicalName.FunctionIdentifier
 * - ModuleLogicalName.FunctionLogicalName
 *
 *
 * This function does not require that the analog input is online at the time
 * it is invoked. The returned object is nevertheless valid.
 * Use the method isOnline() to test if the analog input is
 * indeed online at a given time. In case of ambiguity when looking for
 * an analog input by logical name, no error is notified: the first instance
 * found is returned. The search is performed first by hardware name,
 * then by logical name.
 *
 * If a call to this object's is_online() method returns FALSE although
 * you are certain that the matching device is plugged, make sure that you did
 * call registerHub() at application initialization time.
 *
 * @param func : a string that uniquely characterizes the analog input, for instance
 *         YBUZZER2.anButton1.
 *
 * @return a YAnButton object allowing you to drive the analog input.
 */
YAnButton* YAnButton::FindAnButton(string func)
{
    YAnButton* obj = NULL;
    int taken = 0;
    if (YAPI::_apiInitialized) {
        yEnterCriticalSection(&YAPI::_global_cs);
        taken = 1;
    }try {
        obj = (YAnButton*) YFunction::_FindFromCache("AnButton", func);
        if (obj == NULL) {
            obj = new YAnButton(func);
            YFunction::_AddToCache("AnButton", func, obj);
        }
    } catch (std::exception &) {
        if (taken) yLeaveCriticalSection(&YAPI::_global_cs);
        throw;
    }
    if (taken) yLeaveCriticalSection(&YAPI::_global_cs);
    return obj;
}

/**
 * Registers the callback function that is invoked on every change of advertised value.
 * The callback is then invoked only during the execution of ySleep or yHandleEvents.
 * This provides control over the time when the callback is triggered. For good responsiveness,
 * remember to call one of these two functions periodically. The callback is called once juste after beeing
 * registered, passing the current advertised value  of the function, provided that it is not an empty string.
 * To unregister a callback, pass a NULL pointer as argument.
 *
 * @param callback : the callback function to call, or a NULL pointer. The callback function should take two
 *         arguments: the function object of which the value has changed, and the character string describing
 *         the new advertised value.
 * @noreturn
 */
int YAnButton::registerValueCallback(YAnButtonValueCallback callback)
{
    string val;
    if (callback != NULL) {
        YFunction::_UpdateValueCallbackList(this, true);
    } else {
        YFunction::_UpdateValueCallbackList(this, false);
    }
    _valueCallbackAnButton = callback;
    // Immediately invoke value callback with current value
    if (callback != NULL && this->isOnline()) {
        val = _advertisedValue;
        if (!(val == "")) {
            this->_invokeValueCallback(val);
        }
    }
    return 0;
}

int YAnButton::_invokeValueCallback(string value)
{
    if (_valueCallbackAnButton != NULL) {
        _valueCallbackAnButton(this, value);
    } else {
        YFunction::_invokeValueCallback(value);
    }
    return 0;
}

/**
 * Returns the pulse counter value as well as its timer.
 *
 * @return YAPI::SUCCESS if the call succeeds.
 *
 * On failure, throws an exception or returns a negative error code.
 */
int YAnButton::resetCounter(void)
{
    return this->set_pulseCounter(0);
}

YAnButton *YAnButton::nextAnButton(void)
{
    string  hwid;

    if(YISERR(_nextFunction(hwid)) || hwid=="") {
        return NULL;
    }
    return YAnButton::FindAnButton(hwid);
}

YAnButton *YAnButton::FirstAnButton(void)
{
    vector<YFUN_DESCR>   v_fundescr;
    YDEV_DESCR             ydevice;
    string              serial, funcId, funcName, funcVal, errmsg;

    if(YISERR(YapiWrapper::getFunctionsByClass("AnButton", 0, v_fundescr, sizeof(YFUN_DESCR), errmsg)) ||
       v_fundescr.size() == 0 ||
       YISERR(YapiWrapper::getFunctionInfo(v_fundescr[0], ydevice, serial, funcId, funcName, funcVal, errmsg))) {
        return NULL;
    }
    return YAnButton::FindAnButton(serial+"."+funcId);
}

//--- (end of YAnButton implementation)

//--- (YAnButton functions)
//--- (end of YAnButton functions)
