@renovatebot/kbpgp/lib/openpgp/buffer.js

Keybase's PGP Implementation

// Generated by IcedCoffeeScript 112.8.1
var SlicerBuffer;

SlicerBuffer = (function() {
  function SlicerBuffer(buf, start) {
    this.buf = buf;
    this.start = start != null ? start : 0;
    if (!Buffer.isBuffer(this.buf)) {
      throw new Error('need a Buffer!');
    }
    this.i = this.start;
    this._end = null;
  }

  SlicerBuffer.prototype.clamp = function(len) {
    var ret;
    ret = this._end;
    this._end = this.i + len;
    return ret;
  };

  SlicerBuffer.prototype.unclamp = function(e) {
    this.start = this.i;
    return this._end = e;
  };

  SlicerBuffer.prototype.len = function() {
    return this.buf.length - this.start;
  };

  SlicerBuffer.prototype.rem = function() {
    return this.buf.length - this.i;
  };

  SlicerBuffer.prototype.offset = function() {
    return this.i - this.start;
  };

  SlicerBuffer.prototype.check = function() {
    if ((this._end && this.i > this._end) || (this.i > this.buf.length)) {
      throw new Error("read off the end of the packet @" + this.i + "/" + this.buf.length + "/" + this._end);
    }
  };

  SlicerBuffer.prototype.read_uint8 = function() {
    var ret;
    ret = this.buf.readUInt8(this.i++);
    this.check();
    return ret;
  };

  SlicerBuffer.prototype.read_uint16 = function() {
    var ret;
    ret = this.buf.readUInt16BE(this.i);
    this.i += 2;
    this.check();
    return ret;
  };

  SlicerBuffer.prototype.read_uint32 = function() {
    var ret;
    ret = this.buf.readUInt32BE(this.i);
    this.i += 4;
    this.check();
    return ret;
  };

  SlicerBuffer.prototype.read_buffer_at_most = function(l) {
    return this.read_buffer(Math.min(l, this.rem()));
  };

  SlicerBuffer.prototype.read_buffer = function(l) {
    var ret;
    ret = this.buf.slice(this.i, this.i + l);
    this.i += l;
    this.check();
    return ret;
  };

  SlicerBuffer.prototype.end = function() {
    return this._end || this.buf.length;
  };

  SlicerBuffer.prototype.peek_rest_to_buffer = function() {
    return this.buf.slice(this.i, this.end());
  };

  SlicerBuffer.prototype.consume_rest_to_buffer = function() {
    var ret;
    ret = this.peek_rest_to_buffer();
    this.i = this.end();
    return ret;
  };

  SlicerBuffer.prototype.advance = function(i) {
    if (i == null) {
      i = 1;
    }
    return this.i += i;
  };

  SlicerBuffer.prototype.peek_to_buffer = function(len) {
    return this.buf.slice(this.i, this.i + len);
  };

  SlicerBuffer.prototype.peek_uint8 = function() {
    return this.buf.readUInt8(this.i);
  };

  SlicerBuffer.prototype.peek_uint16 = function() {
    return this.buf.readUInt16BE(this.i);
  };

  SlicerBuffer.prototype.read_string = function() {
    return this.read_buffer(this.read_uint8());
  };

  SlicerBuffer.prototype.read_v4_length = function() {
    var five_byte, len, p;
    p = this.peek_uint8();
    five_byte = false;
    len = p < 192 ? (this.advance(1), p) : p < 224 ? this.read_uint16() - (192 << 8) + 192 : p < 0xff ? (this.advance(1), 1 << (p & 0x1f)) : (this.advance(1), five_byte = true, this.read_uint32());
    return [len, five_byte];
  };

  return SlicerBuffer;

})();

exports.SlicerBuffer = SlicerBuffer;

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