250 lines
7 KiB
JavaScript
Executable file
250 lines
7 KiB
JavaScript
Executable file
// GENERATED FILE. DO NOT EDIT.
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var ipCodec = (function(exports) {
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.decode = decode;
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exports.encode = encode;
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exports.familyOf = familyOf;
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exports.name = void 0;
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exports.sizeOf = sizeOf;
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exports.v6 = exports.v4 = void 0;
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const v4Regex = /^(\d{1,3}\.){3,3}\d{1,3}$/;
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const v4Size = 4;
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const v6Regex = /^(::)?(((\d{1,3}\.){3}(\d{1,3}){1})?([0-9a-f]){0,4}:{0,2}){1,8}(::)?$/i;
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const v6Size = 16;
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const v4 = {
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name: 'v4',
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size: v4Size,
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isFormat: ip => v4Regex.test(ip),
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encode(ip, buff, offset) {
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offset = ~~offset;
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buff = buff || new Uint8Array(offset + v4Size);
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const max = ip.length;
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let n = 0;
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for (let i = 0; i < max;) {
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const c = ip.charCodeAt(i++);
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if (c === 46) {
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// "."
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buff[offset++] = n;
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n = 0;
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} else {
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n = n * 10 + (c - 48);
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}
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}
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buff[offset] = n;
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return buff;
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},
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decode(buff, offset) {
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offset = ~~offset;
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return `${buff[offset++]}.${buff[offset++]}.${buff[offset++]}.${buff[offset]}`;
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}
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};
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exports.v4 = v4;
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const v6 = {
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name: 'v6',
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size: v6Size,
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isFormat: ip => ip.length > 0 && v6Regex.test(ip),
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encode(ip, buff, offset) {
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offset = ~~offset;
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let end = offset + v6Size;
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let fill = -1;
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let hexN = 0;
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let decN = 0;
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let prevColon = true;
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let useDec = false;
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buff = buff || new Uint8Array(offset + v6Size); // Note: This algorithm needs to check if the offset
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// could exceed the buffer boundaries as it supports
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// non-standard compliant encodings that may go beyond
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// the boundary limits. if (offset < end) checks should
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// not be necessary...
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for (let i = 0; i < ip.length; i++) {
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let c = ip.charCodeAt(i);
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if (c === 58) {
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// :
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if (prevColon) {
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if (fill !== -1) {
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// Not Standard! (standard doesn't allow multiple ::)
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// We need to treat
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if (offset < end) buff[offset] = 0;
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if (offset < end - 1) buff[offset + 1] = 0;
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offset += 2;
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} else if (offset < end) {
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// :: in the middle
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fill = offset;
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}
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} else {
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// : ends the previous number
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if (useDec === true) {
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// Non-standard! (ipv4 should be at end only)
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// A ipv4 address should not be found anywhere else but at
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// the end. This codec also support putting characters
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// after the ipv4 address..
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if (offset < end) buff[offset] = decN;
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offset++;
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} else {
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if (offset < end) buff[offset] = hexN >> 8;
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if (offset < end - 1) buff[offset + 1] = hexN & 0xff;
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offset += 2;
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}
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hexN = 0;
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decN = 0;
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}
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prevColon = true;
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useDec = false;
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} else if (c === 46) {
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// . indicates IPV4 notation
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if (offset < end) buff[offset] = decN;
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offset++;
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decN = 0;
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hexN = 0;
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prevColon = false;
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useDec = true;
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} else {
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prevColon = false;
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if (c >= 97) {
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c -= 87; // a-f ... 97~102 -87 => 10~15
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} else if (c >= 65) {
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c -= 55; // A-F ... 65~70 -55 => 10~15
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} else {
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c -= 48; // 0-9 ... starting from charCode 48
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decN = decN * 10 + c;
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} // We don't know yet if its a dec or hex number
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hexN = (hexN << 4) + c;
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}
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}
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if (prevColon === false) {
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// Commiting last number
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if (useDec === true) {
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if (offset < end) buff[offset] = decN;
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offset++;
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} else {
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if (offset < end) buff[offset] = hexN >> 8;
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if (offset < end - 1) buff[offset + 1] = hexN & 0xff;
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offset += 2;
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}
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} else if (fill === 0) {
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// Not Standard! (standard doesn't allow multiple ::)
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// This means that a : was found at the start AND end which means the
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// end needs to be treated as 0 entry...
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if (offset < end) buff[offset] = 0;
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if (offset < end - 1) buff[offset + 1] = 0;
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offset += 2;
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} else if (fill !== -1) {
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// Non-standard! (standard doens't allow multiple ::)
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// Here we find that there has been a :: somewhere in the middle
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// and the end. To treat the end with priority we need to move all
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// written data two bytes to the right.
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offset += 2;
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for (let i = Math.min(offset - 1, end - 1); i >= fill + 2; i--) {
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buff[i] = buff[i - 2];
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}
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buff[fill] = 0;
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buff[fill + 1] = 0;
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fill = offset;
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}
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if (fill !== offset && fill !== -1) {
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// Move the written numbers to the end while filling the everything
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// "fill" to the bytes with zeros.
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if (offset > end - 2) {
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// Non Standard support, when the cursor exceeds bounds.
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offset = end - 2;
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}
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while (end > fill) {
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buff[--end] = offset < end && offset > fill ? buff[--offset] : 0;
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}
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} else {
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// Fill the rest with zeros
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while (offset < end) {
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buff[offset++] = 0;
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}
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}
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return buff;
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},
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decode(buff, offset) {
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offset = ~~offset;
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let result = '';
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for (let i = 0; i < v6Size; i += 2) {
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if (i !== 0) {
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result += ':';
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}
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result += (buff[offset + i] << 8 | buff[offset + i + 1]).toString(16);
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}
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return result.replace(/(^|:)0(:0)*:0(:|$)/, '$1::$3').replace(/:{3,4}/, '::');
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}
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};
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exports.v6 = v6;
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const name = 'ip';
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exports.name = name;
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function sizeOf(ip) {
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if (v4.isFormat(ip)) return v4.size;
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if (v6.isFormat(ip)) return v6.size;
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throw Error(`Invalid ip address: ${ip}`);
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}
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function familyOf(string) {
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return sizeOf(string) === v4.size ? 1 : 2;
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}
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function encode(ip, buff, offset) {
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offset = ~~offset;
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const size = sizeOf(ip);
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if (typeof buff === 'function') {
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buff = buff(offset + size);
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}
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if (size === v4.size) {
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return v4.encode(ip, buff, offset);
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}
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return v6.encode(ip, buff, offset);
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}
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function decode(buff, offset, length) {
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offset = ~~offset;
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length = length || buff.length - offset;
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if (length === v4.size) {
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return v4.decode(buff, offset, length);
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}
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if (length === v6.size) {
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return v6.decode(buff, offset, length);
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}
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throw Error(`Invalid buffer size needs to be ${v4.size} for v4 or ${v6.size} for v6.`);
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}
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return "default" in exports ? exports.default : exports;
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})({});
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if (typeof define === 'function' && define.amd) define([], function() { return ipCodec; });
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else if (typeof module === 'object' && typeof exports==='object') module.exports = ipCodec;
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