+++ /dev/null
-"use strict";
-var Buffer = require("safer-buffer").Buffer;
-
-// UTF-7 codec, according to https://tools.ietf.org/html/rfc2152
-// See also below a UTF-7-IMAP codec, according to http://tools.ietf.org/html/rfc3501#section-5.1.3
-
-exports.utf7 = Utf7Codec;
-exports.unicode11utf7 = 'utf7'; // Alias UNICODE-1-1-UTF-7
-function Utf7Codec(codecOptions, iconv) {
- this.iconv = iconv;
-};
-
-Utf7Codec.prototype.encoder = Utf7Encoder;
-Utf7Codec.prototype.decoder = Utf7Decoder;
-Utf7Codec.prototype.bomAware = true;
-
-
-// -- Encoding
-
-var nonDirectChars = /[^A-Za-z0-9'\(\),-\.\/:\? \n\r\t]+/g;
-
-function Utf7Encoder(options, codec) {
- this.iconv = codec.iconv;
-}
-
-Utf7Encoder.prototype.write = function(str) {
- // Naive implementation.
- // Non-direct chars are encoded as "+<base64>-"; single "+" char is encoded as "+-".
- return Buffer.from(str.replace(nonDirectChars, function(chunk) {
- return "+" + (chunk === '+' ? '' :
- this.iconv.encode(chunk, 'utf16-be').toString('base64').replace(/=+$/, ''))
- + "-";
- }.bind(this)));
-}
-
-Utf7Encoder.prototype.end = function() {
-}
-
-
-// -- Decoding
-
-function Utf7Decoder(options, codec) {
- this.iconv = codec.iconv;
- this.inBase64 = false;
- this.base64Accum = '';
-}
-
-var base64Regex = /[A-Za-z0-9\/+]/;
-var base64Chars = [];
-for (var i = 0; i < 256; i++)
- base64Chars[i] = base64Regex.test(String.fromCharCode(i));
-
-var plusChar = '+'.charCodeAt(0),
- minusChar = '-'.charCodeAt(0),
- andChar = '&'.charCodeAt(0);
-
-Utf7Decoder.prototype.write = function(buf) {
- var res = "", lastI = 0,
- inBase64 = this.inBase64,
- base64Accum = this.base64Accum;
-
- // The decoder is more involved as we must handle chunks in stream.
-
- for (var i = 0; i < buf.length; i++) {
- if (!inBase64) { // We're in direct mode.
- // Write direct chars until '+'
- if (buf[i] == plusChar) {
- res += this.iconv.decode(buf.slice(lastI, i), "ascii"); // Write direct chars.
- lastI = i+1;
- inBase64 = true;
- }
- } else { // We decode base64.
- if (!base64Chars[buf[i]]) { // Base64 ended.
- if (i == lastI && buf[i] == minusChar) {// "+-" -> "+"
- res += "+";
- } else {
- var b64str = base64Accum + buf.slice(lastI, i).toString();
- res += this.iconv.decode(Buffer.from(b64str, 'base64'), "utf16-be");
- }
-
- if (buf[i] != minusChar) // Minus is absorbed after base64.
- i--;
-
- lastI = i+1;
- inBase64 = false;
- base64Accum = '';
- }
- }
- }
-
- if (!inBase64) {
- res += this.iconv.decode(buf.slice(lastI), "ascii"); // Write direct chars.
- } else {
- var b64str = base64Accum + buf.slice(lastI).toString();
-
- var canBeDecoded = b64str.length - (b64str.length % 8); // Minimal chunk: 2 quads -> 2x3 bytes -> 3 chars.
- base64Accum = b64str.slice(canBeDecoded); // The rest will be decoded in future.
- b64str = b64str.slice(0, canBeDecoded);
-
- res += this.iconv.decode(Buffer.from(b64str, 'base64'), "utf16-be");
- }
-
- this.inBase64 = inBase64;
- this.base64Accum = base64Accum;
-
- return res;
-}
-
-Utf7Decoder.prototype.end = function() {
- var res = "";
- if (this.inBase64 && this.base64Accum.length > 0)
- res = this.iconv.decode(Buffer.from(this.base64Accum, 'base64'), "utf16-be");
-
- this.inBase64 = false;
- this.base64Accum = '';
- return res;
-}
-
-
-// UTF-7-IMAP codec.
-// RFC3501 Sec. 5.1.3 Modified UTF-7 (http://tools.ietf.org/html/rfc3501#section-5.1.3)
-// Differences:
-// * Base64 part is started by "&" instead of "+"
-// * Direct characters are 0x20-0x7E, except "&" (0x26)
-// * In Base64, "," is used instead of "/"
-// * Base64 must not be used to represent direct characters.
-// * No implicit shift back from Base64 (should always end with '-')
-// * String must end in non-shifted position.
-// * "-&" while in base64 is not allowed.
-
-
-exports.utf7imap = Utf7IMAPCodec;
-function Utf7IMAPCodec(codecOptions, iconv) {
- this.iconv = iconv;
-};
-
-Utf7IMAPCodec.prototype.encoder = Utf7IMAPEncoder;
-Utf7IMAPCodec.prototype.decoder = Utf7IMAPDecoder;
-Utf7IMAPCodec.prototype.bomAware = true;
-
-
-// -- Encoding
-
-function Utf7IMAPEncoder(options, codec) {
- this.iconv = codec.iconv;
- this.inBase64 = false;
- this.base64Accum = Buffer.alloc(6);
- this.base64AccumIdx = 0;
-}
-
-Utf7IMAPEncoder.prototype.write = function(str) {
- var inBase64 = this.inBase64,
- base64Accum = this.base64Accum,
- base64AccumIdx = this.base64AccumIdx,
- buf = Buffer.alloc(str.length*5 + 10), bufIdx = 0;
-
- for (var i = 0; i < str.length; i++) {
- var uChar = str.charCodeAt(i);
- if (0x20 <= uChar && uChar <= 0x7E) { // Direct character or '&'.
- if (inBase64) {
- if (base64AccumIdx > 0) {
- bufIdx += buf.write(base64Accum.slice(0, base64AccumIdx).toString('base64').replace(/\//g, ',').replace(/=+$/, ''), bufIdx);
- base64AccumIdx = 0;
- }
-
- buf[bufIdx++] = minusChar; // Write '-', then go to direct mode.
- inBase64 = false;
- }
-
- if (!inBase64) {
- buf[bufIdx++] = uChar; // Write direct character
-
- if (uChar === andChar) // Ampersand -> '&-'
- buf[bufIdx++] = minusChar;
- }
-
- } else { // Non-direct character
- if (!inBase64) {
- buf[bufIdx++] = andChar; // Write '&', then go to base64 mode.
- inBase64 = true;
- }
- if (inBase64) {
- base64Accum[base64AccumIdx++] = uChar >> 8;
- base64Accum[base64AccumIdx++] = uChar & 0xFF;
-
- if (base64AccumIdx == base64Accum.length) {
- bufIdx += buf.write(base64Accum.toString('base64').replace(/\//g, ','), bufIdx);
- base64AccumIdx = 0;
- }
- }
- }
- }
-
- this.inBase64 = inBase64;
- this.base64AccumIdx = base64AccumIdx;
-
- return buf.slice(0, bufIdx);
-}
-
-Utf7IMAPEncoder.prototype.end = function() {
- var buf = Buffer.alloc(10), bufIdx = 0;
- if (this.inBase64) {
- if (this.base64AccumIdx > 0) {
- bufIdx += buf.write(this.base64Accum.slice(0, this.base64AccumIdx).toString('base64').replace(/\//g, ',').replace(/=+$/, ''), bufIdx);
- this.base64AccumIdx = 0;
- }
-
- buf[bufIdx++] = minusChar; // Write '-', then go to direct mode.
- this.inBase64 = false;
- }
-
- return buf.slice(0, bufIdx);
-}
-
-
-// -- Decoding
-
-function Utf7IMAPDecoder(options, codec) {
- this.iconv = codec.iconv;
- this.inBase64 = false;
- this.base64Accum = '';
-}
-
-var base64IMAPChars = base64Chars.slice();
-base64IMAPChars[','.charCodeAt(0)] = true;
-
-Utf7IMAPDecoder.prototype.write = function(buf) {
- var res = "", lastI = 0,
- inBase64 = this.inBase64,
- base64Accum = this.base64Accum;
-
- // The decoder is more involved as we must handle chunks in stream.
- // It is forgiving, closer to standard UTF-7 (for example, '-' is optional at the end).
-
- for (var i = 0; i < buf.length; i++) {
- if (!inBase64) { // We're in direct mode.
- // Write direct chars until '&'
- if (buf[i] == andChar) {
- res += this.iconv.decode(buf.slice(lastI, i), "ascii"); // Write direct chars.
- lastI = i+1;
- inBase64 = true;
- }
- } else { // We decode base64.
- if (!base64IMAPChars[buf[i]]) { // Base64 ended.
- if (i == lastI && buf[i] == minusChar) { // "&-" -> "&"
- res += "&";
- } else {
- var b64str = base64Accum + buf.slice(lastI, i).toString().replace(/,/g, '/');
- res += this.iconv.decode(Buffer.from(b64str, 'base64'), "utf16-be");
- }
-
- if (buf[i] != minusChar) // Minus may be absorbed after base64.
- i--;
-
- lastI = i+1;
- inBase64 = false;
- base64Accum = '';
- }
- }
- }
-
- if (!inBase64) {
- res += this.iconv.decode(buf.slice(lastI), "ascii"); // Write direct chars.
- } else {
- var b64str = base64Accum + buf.slice(lastI).toString().replace(/,/g, '/');
-
- var canBeDecoded = b64str.length - (b64str.length % 8); // Minimal chunk: 2 quads -> 2x3 bytes -> 3 chars.
- base64Accum = b64str.slice(canBeDecoded); // The rest will be decoded in future.
- b64str = b64str.slice(0, canBeDecoded);
-
- res += this.iconv.decode(Buffer.from(b64str, 'base64'), "utf16-be");
- }
-
- this.inBase64 = inBase64;
- this.base64Accum = base64Accum;
-
- return res;
-}
-
-Utf7IMAPDecoder.prototype.end = function() {
- var res = "";
- if (this.inBase64 && this.base64Accum.length > 0)
- res = this.iconv.decode(Buffer.from(this.base64Accum, 'base64'), "utf16-be");
-
- this.inBase64 = false;
- this.base64Accum = '';
- return res;
-}
-
-
projects / dotfiles / .git / blobdiff