+++ /dev/null
-"use strict";
-var Buffer = require("buffer").Buffer;
-// Note: not polyfilled with safer-buffer on a purpose, as overrides Buffer
-
-// == Extend Node primitives to use iconv-lite =================================
-
-module.exports = function (iconv) {
- var original = undefined; // Place to keep original methods.
-
- // Node authors rewrote Buffer internals to make it compatible with
- // Uint8Array and we cannot patch key functions since then.
- // Note: this does use older Buffer API on a purpose
- iconv.supportsNodeEncodingsExtension = !(Buffer.from || new Buffer(0) instanceof Uint8Array);
-
- iconv.extendNodeEncodings = function extendNodeEncodings() {
- if (original) return;
- original = {};
-
- if (!iconv.supportsNodeEncodingsExtension) {
- console.error("ACTION NEEDED: require('iconv-lite').extendNodeEncodings() is not supported in your version of Node");
- console.error("See more info at https://github.com/ashtuchkin/iconv-lite/wiki/Node-v4-compatibility");
- return;
- }
-
- var nodeNativeEncodings = {
- 'hex': true, 'utf8': true, 'utf-8': true, 'ascii': true, 'binary': true,
- 'base64': true, 'ucs2': true, 'ucs-2': true, 'utf16le': true, 'utf-16le': true,
- };
-
- Buffer.isNativeEncoding = function(enc) {
- return enc && nodeNativeEncodings[enc.toLowerCase()];
- }
-
- // -- SlowBuffer -----------------------------------------------------------
- var SlowBuffer = require('buffer').SlowBuffer;
-
- original.SlowBufferToString = SlowBuffer.prototype.toString;
- SlowBuffer.prototype.toString = function(encoding, start, end) {
- encoding = String(encoding || 'utf8').toLowerCase();
-
- // Use native conversion when possible
- if (Buffer.isNativeEncoding(encoding))
- return original.SlowBufferToString.call(this, encoding, start, end);
-
- // Otherwise, use our decoding method.
- if (typeof start == 'undefined') start = 0;
- if (typeof end == 'undefined') end = this.length;
- return iconv.decode(this.slice(start, end), encoding);
- }
-
- original.SlowBufferWrite = SlowBuffer.prototype.write;
- SlowBuffer.prototype.write = function(string, offset, length, encoding) {
- // Support both (string, offset, length, encoding)
- // and the legacy (string, encoding, offset, length)
- if (isFinite(offset)) {
- if (!isFinite(length)) {
- encoding = length;
- length = undefined;
- }
- } else { // legacy
- var swap = encoding;
- encoding = offset;
- offset = length;
- length = swap;
- }
-
- offset = +offset || 0;
- var remaining = this.length - offset;
- if (!length) {
- length = remaining;
- } else {
- length = +length;
- if (length > remaining) {
- length = remaining;
- }
- }
- encoding = String(encoding || 'utf8').toLowerCase();
-
- // Use native conversion when possible
- if (Buffer.isNativeEncoding(encoding))
- return original.SlowBufferWrite.call(this, string, offset, length, encoding);
-
- if (string.length > 0 && (length < 0 || offset < 0))
- throw new RangeError('attempt to write beyond buffer bounds');
-
- // Otherwise, use our encoding method.
- var buf = iconv.encode(string, encoding);
- if (buf.length < length) length = buf.length;
- buf.copy(this, offset, 0, length);
- return length;
- }
-
- // -- Buffer ---------------------------------------------------------------
-
- original.BufferIsEncoding = Buffer.isEncoding;
- Buffer.isEncoding = function(encoding) {
- return Buffer.isNativeEncoding(encoding) || iconv.encodingExists(encoding);
- }
-
- original.BufferByteLength = Buffer.byteLength;
- Buffer.byteLength = SlowBuffer.byteLength = function(str, encoding) {
- encoding = String(encoding || 'utf8').toLowerCase();
-
- // Use native conversion when possible
- if (Buffer.isNativeEncoding(encoding))
- return original.BufferByteLength.call(this, str, encoding);
-
- // Slow, I know, but we don't have a better way yet.
- return iconv.encode(str, encoding).length;
- }
-
- original.BufferToString = Buffer.prototype.toString;
- Buffer.prototype.toString = function(encoding, start, end) {
- encoding = String(encoding || 'utf8').toLowerCase();
-
- // Use native conversion when possible
- if (Buffer.isNativeEncoding(encoding))
- return original.BufferToString.call(this, encoding, start, end);
-
- // Otherwise, use our decoding method.
- if (typeof start == 'undefined') start = 0;
- if (typeof end == 'undefined') end = this.length;
- return iconv.decode(this.slice(start, end), encoding);
- }
-
- original.BufferWrite = Buffer.prototype.write;
- Buffer.prototype.write = function(string, offset, length, encoding) {
- var _offset = offset, _length = length, _encoding = encoding;
- // Support both (string, offset, length, encoding)
- // and the legacy (string, encoding, offset, length)
- if (isFinite(offset)) {
- if (!isFinite(length)) {
- encoding = length;
- length = undefined;
- }
- } else { // legacy
- var swap = encoding;
- encoding = offset;
- offset = length;
- length = swap;
- }
-
- encoding = String(encoding || 'utf8').toLowerCase();
-
- // Use native conversion when possible
- if (Buffer.isNativeEncoding(encoding))
- return original.BufferWrite.call(this, string, _offset, _length, _encoding);
-
- offset = +offset || 0;
- var remaining = this.length - offset;
- if (!length) {
- length = remaining;
- } else {
- length = +length;
- if (length > remaining) {
- length = remaining;
- }
- }
-
- if (string.length > 0 && (length < 0 || offset < 0))
- throw new RangeError('attempt to write beyond buffer bounds');
-
- // Otherwise, use our encoding method.
- var buf = iconv.encode(string, encoding);
- if (buf.length < length) length = buf.length;
- buf.copy(this, offset, 0, length);
- return length;
-
- // TODO: Set _charsWritten.
- }
-
-
- // -- Readable -------------------------------------------------------------
- if (iconv.supportsStreams) {
- var Readable = require('stream').Readable;
-
- original.ReadableSetEncoding = Readable.prototype.setEncoding;
- Readable.prototype.setEncoding = function setEncoding(enc, options) {
- // Use our own decoder, it has the same interface.
- // We cannot use original function as it doesn't handle BOM-s.
- this._readableState.decoder = iconv.getDecoder(enc, options);
- this._readableState.encoding = enc;
- }
-
- Readable.prototype.collect = iconv._collect;
- }
- }
-
- // Remove iconv-lite Node primitive extensions.
- iconv.undoExtendNodeEncodings = function undoExtendNodeEncodings() {
- if (!iconv.supportsNodeEncodingsExtension)
- return;
- if (!original)
- throw new Error("require('iconv-lite').undoExtendNodeEncodings(): Nothing to undo; extendNodeEncodings() is not called.")
-
- delete Buffer.isNativeEncoding;
-
- var SlowBuffer = require('buffer').SlowBuffer;
-
- SlowBuffer.prototype.toString = original.SlowBufferToString;
- SlowBuffer.prototype.write = original.SlowBufferWrite;
-
- Buffer.isEncoding = original.BufferIsEncoding;
- Buffer.byteLength = original.BufferByteLength;
- Buffer.prototype.toString = original.BufferToString;
- Buffer.prototype.write = original.BufferWrite;
-
- if (iconv.supportsStreams) {
- var Readable = require('stream').Readable;
-
- Readable.prototype.setEncoding = original.ReadableSetEncoding;
- delete Readable.prototype.collect;
- }
-
- original = undefined;
- }
-}
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