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'use strict';
const binding = process.binding('util');
const prefix = `(${process.release.name}:${process.pid}) `;
const kArrowMessagePrivateSymbolIndex = binding['arrow_message_private_symbol'];
const kDecoratedPrivateSymbolIndex = binding['decorated_private_symbol'];
exports.getHiddenValue = binding.getHiddenValue;
exports.setHiddenValue = binding.setHiddenValue;
// All the internal deprecations have to use this function only, as this will
// prepend the prefix to the actual message.
exports.deprecate = function(fn, msg) {
return exports._deprecate(fn, msg);
};
// All the internal deprecations have to use this function only, as this will
// prepend the prefix to the actual message.
exports.printDeprecationMessage = function(msg, warned, ctor) {
if (warned || process.noDeprecation)
return true;
process.emitWarning(msg, 'DeprecationWarning',
ctor || exports.printDeprecationMessage);
return true;
};
exports.error = function(msg) {
const fmt = `${prefix}${msg}`;
if (arguments.length > 1) {
const args = new Array(arguments.length);
args[0] = fmt;
for (let i = 1; i < arguments.length; ++i)
args[i] = arguments[i];
console.error.apply(console, args);
} else {
console.error(fmt);
}
};
exports.trace = function(msg) {
console.trace(`${prefix}${msg}`);
};
// Mark that a method should not be used.
// Returns a modified function which warns once by default.
// If --no-deprecation is set, then it is a no-op.
exports._deprecate = function(fn, msg) {
// Allow for deprecating things in the process of starting up.
if (global.process === undefined) {
return function() {
return exports._deprecate(fn, msg).apply(this, arguments);
};
}
if (process.noDeprecation === true) {
return fn;
}
var warned = false;
function deprecated() {
warned = exports.printDeprecationMessage(msg, warned, deprecated);
return fn.apply(this, arguments);
}
return deprecated;
};
exports.decorateErrorStack = function decorateErrorStack(err) {
if (!(exports.isError(err) && err.stack) ||
exports.getHiddenValue(err, kDecoratedPrivateSymbolIndex) === true)
return;
const arrow = exports.getHiddenValue(err, kArrowMessagePrivateSymbolIndex);
if (arrow) {
err.stack = arrow + err.stack;
exports.setHiddenValue(err, kDecoratedPrivateSymbolIndex, true);
}
};
exports.isError = function isError(e) {
return exports.objectToString(e) === '[object Error]' || e instanceof Error;
};
exports.objectToString = function objectToString(o) {
return Object.prototype.toString.call(o);
};
const noCrypto = !process.versions.openssl;
exports.assertCrypto = function(exports) {
if (noCrypto)
throw new Error('Node.js is not compiled with openssl crypto support');
};
exports.kIsEncodingSymbol = Symbol('node.isEncoding');
exports.normalizeEncoding = function normalizeEncoding(enc) {
if (!enc) return 'utf8';
var low;
for (;;) {
switch (enc) {
case 'utf8':
case 'utf-8':
return 'utf8';
case 'ucs2':
case 'utf16le':
case 'ucs-2':
case 'utf-16le':
return 'utf16le';
case 'binary':
return 'latin1';
case 'base64':
case 'ascii':
case 'latin1':
case 'hex':
return enc;
default:
if (low) return; // undefined
enc = ('' + enc).toLowerCase();
low = true;
}
}
};
// Filters duplicate strings. Used to support functions in crypto and tls
// modules. Implemented specifically to maintain existing behaviors in each.
exports.filterDuplicateStrings = function filterDuplicateStrings(items, low) {
if (!Array.isArray(items))
return [];
const len = items.length;
if (len <= 1)
return items;
const map = new Map();
for (var i = 0; i < len; i++) {
const item = items[i];
const key = item.toLowerCase();
if (low) {
map.set(key, key);
} else {
if (!map.has(key) || map.get(key) <= item)
map.set(key, item);
}
}
return Array.from(map.values()).sort();
};
exports.cachedResult = function cachedResult(fn) {
var result;
return () => {
if (result === undefined)
result = fn();
return result;
};
};
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