You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
735 lines
17 KiB
735 lines
17 KiB
/*
|
|
* lib/jsprim.js: utilities for primitive JavaScript types
|
|
*/
|
|
|
|
var mod_assert = require('assert-plus');
|
|
var mod_util = require('util');
|
|
|
|
var mod_extsprintf = require('extsprintf');
|
|
var mod_verror = require('verror');
|
|
var mod_jsonschema = require('json-schema');
|
|
|
|
/*
|
|
* Public interface
|
|
*/
|
|
exports.deepCopy = deepCopy;
|
|
exports.deepEqual = deepEqual;
|
|
exports.isEmpty = isEmpty;
|
|
exports.hasKey = hasKey;
|
|
exports.forEachKey = forEachKey;
|
|
exports.pluck = pluck;
|
|
exports.flattenObject = flattenObject;
|
|
exports.flattenIter = flattenIter;
|
|
exports.validateJsonObject = validateJsonObjectJS;
|
|
exports.validateJsonObjectJS = validateJsonObjectJS;
|
|
exports.randElt = randElt;
|
|
exports.extraProperties = extraProperties;
|
|
exports.mergeObjects = mergeObjects;
|
|
|
|
exports.startsWith = startsWith;
|
|
exports.endsWith = endsWith;
|
|
|
|
exports.parseInteger = parseInteger;
|
|
|
|
exports.iso8601 = iso8601;
|
|
exports.rfc1123 = rfc1123;
|
|
exports.parseDateTime = parseDateTime;
|
|
|
|
exports.hrtimediff = hrtimeDiff;
|
|
exports.hrtimeDiff = hrtimeDiff;
|
|
exports.hrtimeAccum = hrtimeAccum;
|
|
exports.hrtimeAdd = hrtimeAdd;
|
|
exports.hrtimeNanosec = hrtimeNanosec;
|
|
exports.hrtimeMicrosec = hrtimeMicrosec;
|
|
exports.hrtimeMillisec = hrtimeMillisec;
|
|
|
|
|
|
/*
|
|
* Deep copy an acyclic *basic* Javascript object. This only handles basic
|
|
* scalars (strings, numbers, booleans) and arbitrarily deep arrays and objects
|
|
* containing these. This does *not* handle instances of other classes.
|
|
*/
|
|
function deepCopy(obj)
|
|
{
|
|
var ret, key;
|
|
var marker = '__deepCopy';
|
|
|
|
if (obj && obj[marker])
|
|
throw (new Error('attempted deep copy of cyclic object'));
|
|
|
|
if (obj && obj.constructor == Object) {
|
|
ret = {};
|
|
obj[marker] = true;
|
|
|
|
for (key in obj) {
|
|
if (key == marker)
|
|
continue;
|
|
|
|
ret[key] = deepCopy(obj[key]);
|
|
}
|
|
|
|
delete (obj[marker]);
|
|
return (ret);
|
|
}
|
|
|
|
if (obj && obj.constructor == Array) {
|
|
ret = [];
|
|
obj[marker] = true;
|
|
|
|
for (key = 0; key < obj.length; key++)
|
|
ret.push(deepCopy(obj[key]));
|
|
|
|
delete (obj[marker]);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* It must be a primitive type -- just return it.
|
|
*/
|
|
return (obj);
|
|
}
|
|
|
|
function deepEqual(obj1, obj2)
|
|
{
|
|
if (typeof (obj1) != typeof (obj2))
|
|
return (false);
|
|
|
|
if (obj1 === null || obj2 === null || typeof (obj1) != 'object')
|
|
return (obj1 === obj2);
|
|
|
|
if (obj1.constructor != obj2.constructor)
|
|
return (false);
|
|
|
|
var k;
|
|
for (k in obj1) {
|
|
if (!obj2.hasOwnProperty(k))
|
|
return (false);
|
|
|
|
if (!deepEqual(obj1[k], obj2[k]))
|
|
return (false);
|
|
}
|
|
|
|
for (k in obj2) {
|
|
if (!obj1.hasOwnProperty(k))
|
|
return (false);
|
|
}
|
|
|
|
return (true);
|
|
}
|
|
|
|
function isEmpty(obj)
|
|
{
|
|
var key;
|
|
for (key in obj)
|
|
return (false);
|
|
return (true);
|
|
}
|
|
|
|
function hasKey(obj, key)
|
|
{
|
|
mod_assert.equal(typeof (key), 'string');
|
|
return (Object.prototype.hasOwnProperty.call(obj, key));
|
|
}
|
|
|
|
function forEachKey(obj, callback)
|
|
{
|
|
for (var key in obj) {
|
|
if (hasKey(obj, key)) {
|
|
callback(key, obj[key]);
|
|
}
|
|
}
|
|
}
|
|
|
|
function pluck(obj, key)
|
|
{
|
|
mod_assert.equal(typeof (key), 'string');
|
|
return (pluckv(obj, key));
|
|
}
|
|
|
|
function pluckv(obj, key)
|
|
{
|
|
if (obj === null || typeof (obj) !== 'object')
|
|
return (undefined);
|
|
|
|
if (obj.hasOwnProperty(key))
|
|
return (obj[key]);
|
|
|
|
var i = key.indexOf('.');
|
|
if (i == -1)
|
|
return (undefined);
|
|
|
|
var key1 = key.substr(0, i);
|
|
if (!obj.hasOwnProperty(key1))
|
|
return (undefined);
|
|
|
|
return (pluckv(obj[key1], key.substr(i + 1)));
|
|
}
|
|
|
|
/*
|
|
* Invoke callback(row) for each entry in the array that would be returned by
|
|
* flattenObject(data, depth). This is just like flattenObject(data,
|
|
* depth).forEach(callback), except that the intermediate array is never
|
|
* created.
|
|
*/
|
|
function flattenIter(data, depth, callback)
|
|
{
|
|
doFlattenIter(data, depth, [], callback);
|
|
}
|
|
|
|
function doFlattenIter(data, depth, accum, callback)
|
|
{
|
|
var each;
|
|
var key;
|
|
|
|
if (depth === 0) {
|
|
each = accum.slice(0);
|
|
each.push(data);
|
|
callback(each);
|
|
return;
|
|
}
|
|
|
|
mod_assert.ok(data !== null);
|
|
mod_assert.equal(typeof (data), 'object');
|
|
mod_assert.equal(typeof (depth), 'number');
|
|
mod_assert.ok(depth >= 0);
|
|
|
|
for (key in data) {
|
|
each = accum.slice(0);
|
|
each.push(key);
|
|
doFlattenIter(data[key], depth - 1, each, callback);
|
|
}
|
|
}
|
|
|
|
function flattenObject(data, depth)
|
|
{
|
|
if (depth === 0)
|
|
return ([ data ]);
|
|
|
|
mod_assert.ok(data !== null);
|
|
mod_assert.equal(typeof (data), 'object');
|
|
mod_assert.equal(typeof (depth), 'number');
|
|
mod_assert.ok(depth >= 0);
|
|
|
|
var rv = [];
|
|
var key;
|
|
|
|
for (key in data) {
|
|
flattenObject(data[key], depth - 1).forEach(function (p) {
|
|
rv.push([ key ].concat(p));
|
|
});
|
|
}
|
|
|
|
return (rv);
|
|
}
|
|
|
|
function startsWith(str, prefix)
|
|
{
|
|
return (str.substr(0, prefix.length) == prefix);
|
|
}
|
|
|
|
function endsWith(str, suffix)
|
|
{
|
|
return (str.substr(
|
|
str.length - suffix.length, suffix.length) == suffix);
|
|
}
|
|
|
|
function iso8601(d)
|
|
{
|
|
if (typeof (d) == 'number')
|
|
d = new Date(d);
|
|
mod_assert.ok(d.constructor === Date);
|
|
return (mod_extsprintf.sprintf('%4d-%02d-%02dT%02d:%02d:%02d.%03dZ',
|
|
d.getUTCFullYear(), d.getUTCMonth() + 1, d.getUTCDate(),
|
|
d.getUTCHours(), d.getUTCMinutes(), d.getUTCSeconds(),
|
|
d.getUTCMilliseconds()));
|
|
}
|
|
|
|
var RFC1123_MONTHS = [
|
|
'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
|
|
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
|
|
var RFC1123_DAYS = [
|
|
'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
|
|
|
|
function rfc1123(date) {
|
|
return (mod_extsprintf.sprintf('%s, %02d %s %04d %02d:%02d:%02d GMT',
|
|
RFC1123_DAYS[date.getUTCDay()], date.getUTCDate(),
|
|
RFC1123_MONTHS[date.getUTCMonth()], date.getUTCFullYear(),
|
|
date.getUTCHours(), date.getUTCMinutes(),
|
|
date.getUTCSeconds()));
|
|
}
|
|
|
|
/*
|
|
* Parses a date expressed as a string, as either a number of milliseconds since
|
|
* the epoch or any string format that Date accepts, giving preference to the
|
|
* former where these two sets overlap (e.g., small numbers).
|
|
*/
|
|
function parseDateTime(str)
|
|
{
|
|
/*
|
|
* This is irritatingly implicit, but significantly more concise than
|
|
* alternatives. The "+str" will convert a string containing only a
|
|
* number directly to a Number, or NaN for other strings. Thus, if the
|
|
* conversion succeeds, we use it (this is the milliseconds-since-epoch
|
|
* case). Otherwise, we pass the string directly to the Date
|
|
* constructor to parse.
|
|
*/
|
|
var numeric = +str;
|
|
if (!isNaN(numeric)) {
|
|
return (new Date(numeric));
|
|
} else {
|
|
return (new Date(str));
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Number.*_SAFE_INTEGER isn't present before node v0.12, so we hardcode
|
|
* the ES6 definitions here, while allowing for them to someday be higher.
|
|
*/
|
|
var MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER || 9007199254740991;
|
|
var MIN_SAFE_INTEGER = Number.MIN_SAFE_INTEGER || -9007199254740991;
|
|
|
|
|
|
/*
|
|
* Default options for parseInteger().
|
|
*/
|
|
var PI_DEFAULTS = {
|
|
base: 10,
|
|
allowSign: true,
|
|
allowPrefix: false,
|
|
allowTrailing: false,
|
|
allowImprecise: false,
|
|
trimWhitespace: false,
|
|
leadingZeroIsOctal: false
|
|
};
|
|
|
|
var CP_0 = 0x30;
|
|
var CP_9 = 0x39;
|
|
|
|
var CP_A = 0x41;
|
|
var CP_B = 0x42;
|
|
var CP_O = 0x4f;
|
|
var CP_T = 0x54;
|
|
var CP_X = 0x58;
|
|
var CP_Z = 0x5a;
|
|
|
|
var CP_a = 0x61;
|
|
var CP_b = 0x62;
|
|
var CP_o = 0x6f;
|
|
var CP_t = 0x74;
|
|
var CP_x = 0x78;
|
|
var CP_z = 0x7a;
|
|
|
|
var PI_CONV_DEC = 0x30;
|
|
var PI_CONV_UC = 0x37;
|
|
var PI_CONV_LC = 0x57;
|
|
|
|
|
|
/*
|
|
* A stricter version of parseInt() that provides options for changing what
|
|
* is an acceptable string (for example, disallowing trailing characters).
|
|
*/
|
|
function parseInteger(str, uopts)
|
|
{
|
|
mod_assert.string(str, 'str');
|
|
mod_assert.optionalObject(uopts, 'options');
|
|
|
|
var baseOverride = false;
|
|
var options = PI_DEFAULTS;
|
|
|
|
if (uopts) {
|
|
baseOverride = hasKey(uopts, 'base');
|
|
options = mergeObjects(options, uopts);
|
|
mod_assert.number(options.base, 'options.base');
|
|
mod_assert.ok(options.base >= 2, 'options.base >= 2');
|
|
mod_assert.ok(options.base <= 36, 'options.base <= 36');
|
|
mod_assert.bool(options.allowSign, 'options.allowSign');
|
|
mod_assert.bool(options.allowPrefix, 'options.allowPrefix');
|
|
mod_assert.bool(options.allowTrailing,
|
|
'options.allowTrailing');
|
|
mod_assert.bool(options.allowImprecise,
|
|
'options.allowImprecise');
|
|
mod_assert.bool(options.trimWhitespace,
|
|
'options.trimWhitespace');
|
|
mod_assert.bool(options.leadingZeroIsOctal,
|
|
'options.leadingZeroIsOctal');
|
|
|
|
if (options.leadingZeroIsOctal) {
|
|
mod_assert.ok(!baseOverride,
|
|
'"base" and "leadingZeroIsOctal" are ' +
|
|
'mutually exclusive');
|
|
}
|
|
}
|
|
|
|
var c;
|
|
var pbase = -1;
|
|
var base = options.base;
|
|
var start;
|
|
var mult = 1;
|
|
var value = 0;
|
|
var idx = 0;
|
|
var len = str.length;
|
|
|
|
/* Trim any whitespace on the left side. */
|
|
if (options.trimWhitespace) {
|
|
while (idx < len && isSpace(str.charCodeAt(idx))) {
|
|
++idx;
|
|
}
|
|
}
|
|
|
|
/* Check the number for a leading sign. */
|
|
if (options.allowSign) {
|
|
if (str[idx] === '-') {
|
|
idx += 1;
|
|
mult = -1;
|
|
} else if (str[idx] === '+') {
|
|
idx += 1;
|
|
}
|
|
}
|
|
|
|
/* Parse the base-indicating prefix if there is one. */
|
|
if (str[idx] === '0') {
|
|
if (options.allowPrefix) {
|
|
pbase = prefixToBase(str.charCodeAt(idx + 1));
|
|
if (pbase !== -1 && (!baseOverride || pbase === base)) {
|
|
base = pbase;
|
|
idx += 2;
|
|
}
|
|
}
|
|
|
|
if (pbase === -1 && options.leadingZeroIsOctal) {
|
|
base = 8;
|
|
}
|
|
}
|
|
|
|
/* Parse the actual digits. */
|
|
for (start = idx; idx < len; ++idx) {
|
|
c = translateDigit(str.charCodeAt(idx));
|
|
if (c !== -1 && c < base) {
|
|
value *= base;
|
|
value += c;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If we didn't parse any digits, we have an invalid number. */
|
|
if (start === idx) {
|
|
return (new Error('invalid number: ' + JSON.stringify(str)));
|
|
}
|
|
|
|
/* Trim any whitespace on the right side. */
|
|
if (options.trimWhitespace) {
|
|
while (idx < len && isSpace(str.charCodeAt(idx))) {
|
|
++idx;
|
|
}
|
|
}
|
|
|
|
/* Check for trailing characters. */
|
|
if (idx < len && !options.allowTrailing) {
|
|
return (new Error('trailing characters after number: ' +
|
|
JSON.stringify(str.slice(idx))));
|
|
}
|
|
|
|
/* If our value is 0, we return now, to avoid returning -0. */
|
|
if (value === 0) {
|
|
return (0);
|
|
}
|
|
|
|
/* Calculate our final value. */
|
|
var result = value * mult;
|
|
|
|
/*
|
|
* If the string represents a value that cannot be precisely represented
|
|
* by JavaScript, then we want to check that:
|
|
*
|
|
* - We never increased the value past MAX_SAFE_INTEGER
|
|
* - We don't make the result negative and below MIN_SAFE_INTEGER
|
|
*
|
|
* Because we only ever increment the value during parsing, there's no
|
|
* chance of moving past MAX_SAFE_INTEGER and then dropping below it
|
|
* again, losing precision in the process. This means that we only need
|
|
* to do our checks here, at the end.
|
|
*/
|
|
if (!options.allowImprecise &&
|
|
(value > MAX_SAFE_INTEGER || result < MIN_SAFE_INTEGER)) {
|
|
return (new Error('number is outside of the supported range: ' +
|
|
JSON.stringify(str.slice(start, idx))));
|
|
}
|
|
|
|
return (result);
|
|
}
|
|
|
|
|
|
/*
|
|
* Interpret a character code as a base-36 digit.
|
|
*/
|
|
function translateDigit(d)
|
|
{
|
|
if (d >= CP_0 && d <= CP_9) {
|
|
/* '0' to '9' -> 0 to 9 */
|
|
return (d - PI_CONV_DEC);
|
|
} else if (d >= CP_A && d <= CP_Z) {
|
|
/* 'A' - 'Z' -> 10 to 35 */
|
|
return (d - PI_CONV_UC);
|
|
} else if (d >= CP_a && d <= CP_z) {
|
|
/* 'a' - 'z' -> 10 to 35 */
|
|
return (d - PI_CONV_LC);
|
|
} else {
|
|
/* Invalid character code */
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Test if a value matches the ECMAScript definition of trimmable whitespace.
|
|
*/
|
|
function isSpace(c)
|
|
{
|
|
return (c === 0x20) ||
|
|
(c >= 0x0009 && c <= 0x000d) ||
|
|
(c === 0x00a0) ||
|
|
(c === 0x1680) ||
|
|
(c === 0x180e) ||
|
|
(c >= 0x2000 && c <= 0x200a) ||
|
|
(c === 0x2028) ||
|
|
(c === 0x2029) ||
|
|
(c === 0x202f) ||
|
|
(c === 0x205f) ||
|
|
(c === 0x3000) ||
|
|
(c === 0xfeff);
|
|
}
|
|
|
|
|
|
/*
|
|
* Determine which base a character indicates (e.g., 'x' indicates hex).
|
|
*/
|
|
function prefixToBase(c)
|
|
{
|
|
if (c === CP_b || c === CP_B) {
|
|
/* 0b/0B (binary) */
|
|
return (2);
|
|
} else if (c === CP_o || c === CP_O) {
|
|
/* 0o/0O (octal) */
|
|
return (8);
|
|
} else if (c === CP_t || c === CP_T) {
|
|
/* 0t/0T (decimal) */
|
|
return (10);
|
|
} else if (c === CP_x || c === CP_X) {
|
|
/* 0x/0X (hexadecimal) */
|
|
return (16);
|
|
} else {
|
|
/* Not a meaningful character */
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
|
|
function validateJsonObjectJS(schema, input)
|
|
{
|
|
var report = mod_jsonschema.validate(input, schema);
|
|
|
|
if (report.errors.length === 0)
|
|
return (null);
|
|
|
|
/* Currently, we only do anything useful with the first error. */
|
|
var error = report.errors[0];
|
|
|
|
/* The failed property is given by a URI with an irrelevant prefix. */
|
|
var propname = error['property'];
|
|
var reason = error['message'].toLowerCase();
|
|
var i, j;
|
|
|
|
/*
|
|
* There's at least one case where the property error message is
|
|
* confusing at best. We work around this here.
|
|
*/
|
|
if ((i = reason.indexOf('the property ')) != -1 &&
|
|
(j = reason.indexOf(' is not defined in the schema and the ' +
|
|
'schema does not allow additional properties')) != -1) {
|
|
i += 'the property '.length;
|
|
if (propname === '')
|
|
propname = reason.substr(i, j - i);
|
|
else
|
|
propname = propname + '.' + reason.substr(i, j - i);
|
|
|
|
reason = 'unsupported property';
|
|
}
|
|
|
|
var rv = new mod_verror.VError('property "%s": %s', propname, reason);
|
|
rv.jsv_details = error;
|
|
return (rv);
|
|
}
|
|
|
|
function randElt(arr)
|
|
{
|
|
mod_assert.ok(Array.isArray(arr) && arr.length > 0,
|
|
'randElt argument must be a non-empty array');
|
|
|
|
return (arr[Math.floor(Math.random() * arr.length)]);
|
|
}
|
|
|
|
function assertHrtime(a)
|
|
{
|
|
mod_assert.ok(a[0] >= 0 && a[1] >= 0,
|
|
'negative numbers not allowed in hrtimes');
|
|
mod_assert.ok(a[1] < 1e9, 'nanoseconds column overflow');
|
|
}
|
|
|
|
/*
|
|
* Compute the time elapsed between hrtime readings A and B, where A is later
|
|
* than B. hrtime readings come from Node's process.hrtime(). There is no
|
|
* defined way to represent negative deltas, so it's illegal to diff B from A
|
|
* where the time denoted by B is later than the time denoted by A. If this
|
|
* becomes valuable, we can define a representation and extend the
|
|
* implementation to support it.
|
|
*/
|
|
function hrtimeDiff(a, b)
|
|
{
|
|
assertHrtime(a);
|
|
assertHrtime(b);
|
|
mod_assert.ok(a[0] > b[0] || (a[0] == b[0] && a[1] >= b[1]),
|
|
'negative differences not allowed');
|
|
|
|
var rv = [ a[0] - b[0], 0 ];
|
|
|
|
if (a[1] >= b[1]) {
|
|
rv[1] = a[1] - b[1];
|
|
} else {
|
|
rv[0]--;
|
|
rv[1] = 1e9 - (b[1] - a[1]);
|
|
}
|
|
|
|
return (rv);
|
|
}
|
|
|
|
/*
|
|
* Convert a hrtime reading from the array format returned by Node's
|
|
* process.hrtime() into a scalar number of nanoseconds.
|
|
*/
|
|
function hrtimeNanosec(a)
|
|
{
|
|
assertHrtime(a);
|
|
|
|
return (Math.floor(a[0] * 1e9 + a[1]));
|
|
}
|
|
|
|
/*
|
|
* Convert a hrtime reading from the array format returned by Node's
|
|
* process.hrtime() into a scalar number of microseconds.
|
|
*/
|
|
function hrtimeMicrosec(a)
|
|
{
|
|
assertHrtime(a);
|
|
|
|
return (Math.floor(a[0] * 1e6 + a[1] / 1e3));
|
|
}
|
|
|
|
/*
|
|
* Convert a hrtime reading from the array format returned by Node's
|
|
* process.hrtime() into a scalar number of milliseconds.
|
|
*/
|
|
function hrtimeMillisec(a)
|
|
{
|
|
assertHrtime(a);
|
|
|
|
return (Math.floor(a[0] * 1e3 + a[1] / 1e6));
|
|
}
|
|
|
|
/*
|
|
* Add two hrtime readings A and B, overwriting A with the result of the
|
|
* addition. This function is useful for accumulating several hrtime intervals
|
|
* into a counter. Returns A.
|
|
*/
|
|
function hrtimeAccum(a, b)
|
|
{
|
|
assertHrtime(a);
|
|
assertHrtime(b);
|
|
|
|
/*
|
|
* Accumulate the nanosecond component.
|
|
*/
|
|
a[1] += b[1];
|
|
if (a[1] >= 1e9) {
|
|
/*
|
|
* The nanosecond component overflowed, so carry to the seconds
|
|
* field.
|
|
*/
|
|
a[0]++;
|
|
a[1] -= 1e9;
|
|
}
|
|
|
|
/*
|
|
* Accumulate the seconds component.
|
|
*/
|
|
a[0] += b[0];
|
|
|
|
return (a);
|
|
}
|
|
|
|
/*
|
|
* Add two hrtime readings A and B, returning the result as a new hrtime array.
|
|
* Does not modify either input argument.
|
|
*/
|
|
function hrtimeAdd(a, b)
|
|
{
|
|
assertHrtime(a);
|
|
|
|
var rv = [ a[0], a[1] ];
|
|
|
|
return (hrtimeAccum(rv, b));
|
|
}
|
|
|
|
|
|
/*
|
|
* Check an object for unexpected properties. Accepts the object to check, and
|
|
* an array of allowed property names (strings). Returns an array of key names
|
|
* that were found on the object, but did not appear in the list of allowed
|
|
* properties. If no properties were found, the returned array will be of
|
|
* zero length.
|
|
*/
|
|
function extraProperties(obj, allowed)
|
|
{
|
|
mod_assert.ok(typeof (obj) === 'object' && obj !== null,
|
|
'obj argument must be a non-null object');
|
|
mod_assert.ok(Array.isArray(allowed),
|
|
'allowed argument must be an array of strings');
|
|
for (var i = 0; i < allowed.length; i++) {
|
|
mod_assert.ok(typeof (allowed[i]) === 'string',
|
|
'allowed argument must be an array of strings');
|
|
}
|
|
|
|
return (Object.keys(obj).filter(function (key) {
|
|
return (allowed.indexOf(key) === -1);
|
|
}));
|
|
}
|
|
|
|
/*
|
|
* Given three sets of properties "provided" (may be undefined), "overrides"
|
|
* (required), and "defaults" (may be undefined), construct an object containing
|
|
* the union of these sets with "overrides" overriding "provided", and
|
|
* "provided" overriding "defaults". None of the input objects are modified.
|
|
*/
|
|
function mergeObjects(provided, overrides, defaults)
|
|
{
|
|
var rv, k;
|
|
|
|
rv = {};
|
|
if (defaults) {
|
|
for (k in defaults)
|
|
rv[k] = defaults[k];
|
|
}
|
|
|
|
if (provided) {
|
|
for (k in provided)
|
|
rv[k] = provided[k];
|
|
}
|
|
|
|
if (overrides) {
|
|
for (k in overrides)
|
|
rv[k] = overrides[k];
|
|
}
|
|
|
|
return (rv);
|
|
}
|