tedious/lib/token/colinfo-token-parser.js

A TDS driver, for connecting to MS SQLServer databases.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _token = require("./token");
var _helpers = require("./helpers");
// s2.2.7.3

const STATUS = {
  EXPRESSION: 0x04,
  KEY: 0x08,
  HIDDEN: 0x10,
  DIFFERENT_NAME: 0x20
};
function colInfoParser(buf, offset, _options) {
  // length
  let tokenLength;
  ({
    offset,
    value: tokenLength
  } = (0, _helpers.readUInt16LE)(buf, offset));
  if (buf.length < offset + tokenLength) {
    throw new _helpers.NotEnoughDataError(offset + tokenLength);
  }
  const end = offset + tokenLength;
  const columns = [];
  while (offset < end) {
    let colNum;
    ({
      offset,
      value: colNum
    } = (0, _helpers.readUInt8)(buf, offset));
    let tableNum;
    ({
      offset,
      value: tableNum
    } = (0, _helpers.readUInt8)(buf, offset));
    let status;
    ({
      offset,
      value: status
    } = (0, _helpers.readUInt8)(buf, offset));
    let colName;
    if (status & STATUS.DIFFERENT_NAME) {
      ({
        offset,
        value: colName
      } = (0, _helpers.readBVarChar)(buf, offset));
    }
    columns.push({
      colNum: colNum,
      tableNum: tableNum,
      expression: !!(status & STATUS.EXPRESSION),
      key: !!(status & STATUS.KEY),
      hidden: !!(status & STATUS.HIDDEN),
      colName: colName
    });
  }
  if (offset !== end) {
    throw new Error('Malformed COLINFO token');
  }
  return new _helpers.Result(new _token.ColInfoToken(columns), offset);
}
var _default = exports.default = colInfoParser;
module.exports = colInfoParser;
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