"use strict";
/**
* @module opcua.status-code
*/
var util = require("util");
var _ = require("underscore");
var assert = require("node-opcua-assert");
var StatusCodes = require("node-opcua-constants").StatusCodes;
var extraStatusCodeBits = {
// StatusCode Special bits
//
// StructureChanged 15:15 Indicates that the structure of the associated data value has changed since the last
// Notification. Clients should not process the data value unless they re-read the metadata.
// Servers shall set this bit if the DataTypeEncoding used for a Variable changes.
// 7.24 describes how the DataTypeEncoding is specified for a Variable.Servers shall also
// set this bit if the EnumStrings Property of the DataType of the Variable changes.
// This bit is provided to warn Clients that parse complex data values that their parsing
// routines could fail because the serialized form of the data value has changed.
// This bit has meaning only for StatusCodes returned as part of a data change Notification
// or the HistoryRead. StatusCodes used in other contexts shall always set this bit to zero.
//
StructureChanged: (0x1 << 15),
// SemanticsChanged 14:14 Semantics of the associated data value have changed. Clients should not process the data
// value until they re-read the metadata associated with the Variable. Servers should set
// this bit if the metadata has changed in way that could cause application errors if the
// Client does not re-read the metadata. For example, a change to the engineering units
// could create problems if the Client uses the value to perform calculations.
// Part 8 defines the conditions where a Server shall set this bit for a DA Variable.
// Other specifications may define additional conditions. A Server may define other
// conditions that cause this bit to be set.
// This bit has meaning only for StatusCodes returned as part of a data change Notification
// or the HistoryRead. StatusCodes used in other contexts shall always set this bit to zero.
SemanticChanged: (0x1<<14),
// Reserved 12:13 Reserved for future use. Shall always be zero.
// InfoType 10:11 The type of information contained in the info bits. These bits have the following meanings:
// NotUsed 00 The info bits are not used and shall be set to zero.
// DataValue 01 The StatusCode and its info bits are associated with a data value
// returned from the Server. This flag is only used in combination with
// StatusCodes defined in Part 8.
// Reserved 1X Reserved for future use. The info bits shall be ignored.
//
InfoTypeDataValue: (0x1 << 10), // 0x0400,
// InfoBits 0:9 Additional information bits that qualify the StatusCode.
// The structure of these bits depends on the Info Type field.
//
// LimitBits 8:9 The limit bits associated with the data value. The limits bits have the
// following meanings:
// Limit Bits Description
// None 00 The value is free to change.
// Low 01 The value is at the lower limit for the data source.
// High 10 The value is at the higher limit for the data source.
// Constant 11 The value is constant and cannot change.
LimitLow: (0x1 << 8),
LimitHigh: (0x2 << 8),
LimitConstant: (0x3 << 8),
// Overflow 7:7 This bit shall only be set if the MonitoredItem queue size is greater than 1.
// If this bit is set, not every detected change has been returned since the Server’s
// queue buffer for the MonitoredItem reached its limit and had to purge out data.
Overflow: (0x1 << 7), // 1 << 7
// Reserved 5:6 Reserved for future use. Shall always be zero.
// HistorianBits 0:4 These bits are set only when reading historical data. They indicate where the data value
// came from and provide information that affects how the Client uses the data value.
// The historian bits have the following meaning:
// Raw XXX00 A raw data value.
// Calculated XXX01 A data value which was calculated.
// Interpolated XXX10 A data value which was interpolated.
// Reserved XXX11 Undefined.
// Partial XX1XX A data value which was calculated with an incomplete interval.
// Extra Data X1XXX A raw data value that hides other data at the same timestamp.
// Multi Value 1XXXX Multiple values match the Aggregate criteria (i.e. multiple
// minimum values at different timestamps within the same interval).
// Part 11 describes how these bits are used in more detail.
HistorianCalculated: 0x1 << 0,
HistorianInterpolated: 0x2 << 0,
HistorianPartial: 0x1 << 2,
HistorianExtraData: 0x1 << 3,
HistorianMultiValue: 0x1 << 4,
};
// Release 1.03 144 OPC Unified Architecture, Part 4
StatusCodes.Bad = {
name: "Bad",
value: 0x80000000,
description: "The value is bad but no specific reason is known."
};
StatusCodes.Uncertain = {
name: "Uncertain",
value: 0x40000000,
description: "The value is uncertain but no specific reason is known."
};
/**
* a particular StatusCode , with it's value , name and description
*
* @class StatusCode
* @param options
* @param options.value
* @param options.description
* @param options.name
*
* @constructor
*/
function StatusCode(options) {
this.value = options.value;
this.description = options.description;
this.name = options.name;
//xx this.highword = this.value ? 0x8000 + this.value : 0 ;
}
/**
*
* @method toString
* @return {string}
*/
StatusCode.prototype.toString = function () {
return this.name + " (0x" + ("0000" + this.value.toString(16)).substr(-8) + ")";
};
StatusCode.prototype.checkBit = function(mask) {
return (this.value & mask ) === mask ;
};
StatusCode.prototype.__defineGetter__("hasOverflowBit", function() {
return this.checkBit(extraStatusCodeBits.Overflow);
});
StatusCode.prototype.__defineGetter__("hasSemanticChangedBit", function() {
return this.checkBit(extraStatusCodeBits.SemanticChanged);
});
StatusCode.prototype.__defineGetter__("hasStructureChangedBit", function() {
return this.checkBit(extraStatusCodeBits.StructureChanged);
});
StatusCode.prototype.valueOf = function() {
return this.value;
};
exports.StatusCode = StatusCode;
function ConstantStatusCode(options) {
StatusCode.apply(this, arguments);
}
util.inherits(ConstantStatusCode, StatusCode);
var encodeStatusCode = function (statusCode, stream) {
assert(statusCode instanceof StatusCode || statusCode instanceof ConstantStatusCode);
stream.writeUInt32(statusCode.value);
};
exports.encodeStatusCode = encodeStatusCode;
function b(c) {
var tmp ="0000000000000000000000"+(c >>>0).toString(2);
return tmp.substr(-32);
}
var decodeStatusCode = function (stream) {
var code = stream.readUInt32();
var code_without_info_bits = (code & 0xFFFF0000)>>>0;
var info_bits = code & 0x0000FFFF;
//xx console.log(b(mask));
//xx console.log(b(~mask));
//xx console.log(b(code));
//xx console.log(b(code_without_info_bits));
var sc = StatusCodes_reverse_map[code_without_info_bits];
if(!sc) {
sc = StatusCodes.Bad;
console.warn("expecting a known StatusCode but got 0x"+ code_without_info_bits.toString(16));
}
if (info_bits) {
var tmp = new ModifiableStatusCode({_base: sc});
tmp.set(info_bits);
sc =tmp;
}
return sc;
};
exports.decodeStatusCode = decodeStatusCode;
/* construct status codes fast search indexes */
var StatusCodes_reverse_map = {};
_.forEach(StatusCodes, function (code) {
code = new ConstantStatusCode(code);
StatusCodes_reverse_map[code.value] = code;
StatusCodes[code.name] = code;
});
/**
* @module StatusCodes
* @type {exports.StatusCodes|*}
*/
exports.StatusCodes = StatusCodes;
function ModifiableStatusCode(options) {
this._base = options._base;
this._extraBits = 0;
if (this._base instanceof ModifiableStatusCode) {
this._extraBits = this._base._extraBits;
this._base = this._base._base;
}
}
util.inherits(ModifiableStatusCode, StatusCode);
ModifiableStatusCode.prototype._getExtraName= function() {
var self = this;
var str = [];
_.forEach(extraStatusCodeBits,function(value,key){
if ((self._extraBits & value ) === value) {
str.push(key);
}
});
if (str.length === 0) {
return "";
}
return "#" + str.join("|");
};
ModifiableStatusCode.prototype.__defineGetter__("value",function() {
return this._base.value + this._extraBits;
});
ModifiableStatusCode.prototype.__defineGetter__("name",function() {
return this._base.name + this._getExtraName();
});
ModifiableStatusCode.prototype.__defineGetter__("description",function() {
return this._base.description;
});
ModifiableStatusCode.prototype.valueOf = function() {
return this._base.value;
};
ModifiableStatusCode.prototype.set = function(bit) {
if (typeof bit === "string") {
var bitsarray = bit.split(" | ");
if (bitsarray.length > 1) {
for (var i = 0; i < bitsarray.length; i++) {
this.set(bitsarray[i]);
}
return;
}
var tmp = extraStatusCodeBits[bit];
if (!tmp) {
throw new Error("Invalid StatusCode Bit "+ bit);
}
bit = tmp;
}
this._extraBits = this._extraBits | bit;
};
ModifiableStatusCode.prototype.unset = function(bit) {
if (typeof bit === "string") {
var bitsarray = bit.split(" | ");
if (bitsarray.length > 1) {
for (var i = 0; i < bitsarray.length; i++) {
console.log(" Unset",this._extraBits.toString(16));
this.unset(bitsarray[i]);
console.log(" Unset",this._extraBits.toString(16));
}
return;
}
var tmp = extraStatusCodeBits[bit];
if (!tmp) {
throw new Error("Invalid StatusCode Bit "+ bit);
}
bit = tmp;
}
this._extraBits = this._extraBits & (~bit >>> 0) ;
};
// return a status code that can be modified
exports.StatusCodes.makeStatusCode = function(statusCode,optionalBits) {
var tmp = new ModifiableStatusCode({
_base: statusCode
});
if (optionalBits) {
tmp.set(optionalBits);
}
return tmp;
};
StatusCodes.GoodWithOverflowBit = StatusCodes.makeStatusCode(StatusCodes.Good,"Overflow | InfoTypeDataValue");
function coerceStatusCode(statusCode) {
if (statusCode instanceof StatusCode) {
return statusCode;
}
assert(statusCode.hasOwnProperty("name"));
return StatusCodes[statusCode.name];
}
exports.coerceStatusCode = coerceStatusCode;
The NodeOPCUA API