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