buffer.js

(function(){
  class Reader {

      constructor(buffer) {
          this.index = 0;
          this.buffer = new DataView(buffer);
      }

      readInt8() {
          return this.buffer.getInt8(this.index++);
      }

      readUInt8() {
          return this.buffer.getUint8(this.index++)
      }

      readInt16(le) {
          this.index += 2;
          return this.buffer.getInt16(this.index - 2, le || false);
      }

      readUInt16(le) {
          this.index += 2;
          return this.buffer.getUint16(this.index - 2, le || false);
      }

      readInt32(le) {
          this.index += 4;
          return this.buffer.getInt32(this.index - 4, le || false)
      }

      readUInt32(le) {
          this.index += 4;
          return this.buffer.getUint32(this.index - 4, le || false);
      }

      readInt64(le) {
          this.index += 8;
          return this.buffer.getBigInt64(this.index - 8, le || false);
      }

      readUInt64(le) {
          this.index += 8;
          return this.buffer.getBigUint64(this.index - 8, le || false);
      }

      readFloat32(le) {
          this.index += 4;
          return this.buffer.getFloat32(this.index - 4, le || false);
      }

      readFloat64(le) {
          this.index += 8;
          return this.buffer.getFloat64(this.index - 8, le || false);
      }

      readString8() {
          var data = "";
          while(true){
            var char = this.readUInt8();
            if(char == 0) break;
            data += String.fromCharCode(char);
          }
          return data;
      }

      readString16(le) {
          var data = "";
          le = le || false;
          while(true){
            var char = this.readUInt16(le);
            if(char == 0) break;
            data += String.fromCharCode(char);
          }
          return data;
      }

      readString32(length, le) {
          var data = "";
          le = le || false;
          while(true){
            var char = this.readUInt32(le);
            if(char == 0) break;
            data += String.fromCharCode(char);
          }
          return data;
      }

  }

  class Writer {

      constructor(size) {
          this.index = 0;
          this.buffer = new DataView(new ArrayBuffer(size));
      }

      toBuffer() {
          return this.buffer.buffer;
      }

      writeInt8(n) {
          this.buffer.setInt8(this.index++, n);
      }

      writeUInt8(n) {
          this.buffer.setUint8(this.index++, n);
      }

      writeInt16(n, le) {
          this.buffer.setInt16(this.index, n, le || false);
          this.index += 2;
      }

      writeUInt16(n, le) {
          this.buffer.setUint16(this.index, n, le || false);
          this.index += 2;
      }

      writeInt32(n, le) {
          this.buffer.setInt32(this.index, n, le || false);
          this.index += 4;
      }

      writeUInt32(n, le) {
          this.buffer.setUint32(this.index, n, le || false);
          this.index += 4;
      }

      writeInt64(n, le) {
          this.buffer.setBigInt64(this.index, n, le || false);
          this.index += 8;
      }

      writeUInt64(n, le) {
          this.buffer.setBitUint64(this.index, n, le || false);
          this.index += 8;
      }

      writeFloat32(n, le) {
          this.buffer.setFloat32(this.index, n, le || false);
          this.index += 4;
      }

      writeFloat64(n, le) {
          this.buffer.setFloat64(this.index, n, le || false)
      }

      writeString8(n) {
          if (typeof n !== 'string') return;
          for (var i in n) {
              this.writeUInt8(n.charCodeAt(i))
          }
          this.writeUInt8(0);
      }

      writeString16(n, le) {
          if (typeof n !== 'string') return;
          le = le || false;
          for (var i in n) {
              this.writeUInt16(n.charCodeAt(i), le)
          }
          this.writeUInt16(0);
      }

      writeString32(n, le) {
          if (typeof n !== 'string') return;
          le = le || false;
          for (var i in n) {
              this.writeUInt32(n.charCodeAt(i), le)
          }
          this.writeUInt32(0);
      }

  }

  window.Buffer = {
    Writer: Writer,
    Reader: Reader
  }
})();