"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true,
});
exports.default = void 0;
var _encode = _interopRequireDefault(require("./encode"));
function _interopRequireDefault(e) {
  return e && e.__esModule ? e : { default: e };
}
const MAX_SEGMENT_LENGTH = 7;
const ONE_MEG = 1024 * 1024;
const COMMA = 0x2c;
const SEMICOLON = 0x3b;
class B64Builder {
  constructor() {
    this.buffer = Buffer.alloc(ONE_MEG);
    this.pos = 0;
    this.hasSegment = false;
  }
  markLines(n) {
    if (n < 1) {
      return this;
    }
    this.hasSegment = false;
    if (this.pos + n >= this.buffer.length) {
      this._realloc();
    }
    while (n--) {
      this.buffer[this.pos++] = SEMICOLON;
    }
    return this;
  }
  startSegment(column) {
    if (this.hasSegment) {
      this._writeByte(COMMA);
    } else {
      this.hasSegment = true;
    }
    this.append(column);
    return this;
  }
  append(value) {
    if (this.pos + MAX_SEGMENT_LENGTH >= this.buffer.length) {
      this._realloc();
    }
    this.pos = (0, _encode.default)(value, this.buffer, this.pos);
    return this;
  }
  toString() {
    return this.buffer.toString("ascii", 0, this.pos);
  }
  _writeByte(byte) {
    if (this.pos === this.buffer.length) {
      this._realloc();
    }
    this.buffer[this.pos++] = byte;
  }
  _realloc() {
    const { buffer } = this;
    this.buffer = Buffer.alloc(buffer.length * 2);
    buffer.copy(this.buffer);
  }
}
exports.default = B64Builder;