mssql2/lib/udt.js

Microsoft SQL Server client for Node.js (fork)

// Generated by CoffeeScript 1.10.0
(function() {
  var FIGURE, FIGURE_V2, Point, SEGMENT, SHAPE, SHAPE_V2, parseFigures, parseGeography, parseM, parsePoints, parseSegments, parseShapes, parseZ;

  FIGURE = {
    INTERIOR_RING: 0x00,
    STROKE: 0x01,
    EXTERIOR_RING: 0x02
  };

  FIGURE_V2 = {
    POINT: 0x00,
    LINE: 0x01,
    ARC: 0x02,
    COMPOSITE_CURVE: 0x03
  };

  SHAPE = {
    POINT: 0x01,
    LINESTRING: 0x02,
    POLYGON: 0x03,
    MULTIPOINT: 0x04,
    MULTILINESTRING: 0x05,
    MULTIPOLYGON: 0x06,
    GEOMETRY_COLLECTION: 0x07
  };

  SHAPE_V2 = {
    POINT: 0x01,
    LINESTRING: 0x02,
    POLYGON: 0x03,
    MULTIPOINT: 0x04,
    MULTILINESTRING: 0x05,
    MULTIPOLYGON: 0x06,
    GEOMETRY_COLLECTION: 0x07,
    CIRCULAR_STRING: 0x08,
    COMPOUND_CURVE: 0x09,
    CURVE_POLYGON: 0x0A,
    FULL_GLOBE: 0x0B
  };

  SEGMENT = {
    LINE: 0x00,
    ARC: 0x01,
    FIRST_LINE: 0x02,
    FIRST_ARC: 0x03
  };

  Point = (function() {
    function Point() {}

    Point.prototype.x = 0;

    Point.prototype.y = 0;

    Point.prototype.z = null;

    Point.prototype.m = null;

    return Point;

  })();

  parseGeography = function(buffer, geometry) {
    var flags, numberOfFigures, numberOfPoints, numberOfSegments, numberOfShapes, properties, srid, value;
    if (geometry == null) {
      geometry = false;
    }
    srid = buffer.readInt32LE(0);
    if (srid === -1) {
      return null;
    }
    value = {
      srid: srid,
      version: buffer.readUInt8(4)
    };
    flags = buffer.readUInt8(5);
    buffer.position = 6;
    properties = {
      Z: flags & (1 << 0) ? true : false,
      M: flags & (1 << 1) ? true : false,
      V: flags & (1 << 2) ? true : false,
      P: flags & (1 << 3) ? true : false,
      L: flags & (1 << 4) ? true : false
    };
    if (value.version === 2) {
      properties.H = flags & (1 << 3) ? true : false;
    }
    if (properties.P) {
      numberOfPoints = 1;
    } else if (properties.L) {
      numberOfPoints = 2;
    } else {
      numberOfPoints = buffer.readUInt32LE(buffer.position);
      buffer.position += 4;
    }
    value.points = parsePoints(buffer, numberOfPoints);
    if (properties.Z) {
      parseZ(buffer, value.points);
    }
    if (properties.M) {
      parseM(buffer, value.points);
    }
    if (properties.P) {
      numberOfFigures = 1;
    } else if (properties.L) {
      numberOfFigures = 1;
    } else {
      numberOfFigures = buffer.readUInt32LE(buffer.position);
      buffer.position += 4;
    }
    value.figures = parseFigures(buffer, numberOfFigures, properties);
    if (properties.P) {
      numberOfShapes = 1;
    } else if (properties.L) {
      numberOfShapes = 1;
    } else {
      numberOfShapes = buffer.readUInt32LE(buffer.position);
      buffer.position += 4;
    }
    value.shapes = parseShapes(buffer, numberOfShapes, properties);
    if (value.version === 2) {
      numberOfSegments = buffer.readUInt32LE(buffer.position);
      buffer.position += 4;
      value.segments = parseSegments(buffer, numberOfSegments);
    } else {
      value.segments = [];
    }
    return value;
  };

  parsePoints = function(buffer, count) {
    var i, j, point, points, ref;
    points = [];
    if (count < 1) {
      return points;
    }
    for (i = j = 1, ref = count; 1 <= ref ? j <= ref : j >= ref; i = 1 <= ref ? ++j : --j) {
      points.push((point = new Point));
      point.x = buffer.readDoubleLE(buffer.position);
      point.y = buffer.readDoubleLE(buffer.position + 8);
      buffer.position += 16;
    }
    return points;
  };

  parseZ = function(buffer, points) {
    var j, len, point, results;
    if (points < 1) {
      return;
    }
    results = [];
    for (j = 0, len = points.length; j < len; j++) {
      point = points[j];
      point.z = buffer.readDoubleLE(buffer.position);
      results.push(buffer.position += 8);
    }
    return results;
  };

  parseM = function(buffer, points) {
    var j, len, point, results;
    if (points < 1) {
      return;
    }
    results = [];
    for (j = 0, len = points.length; j < len; j++) {
      point = points[j];
      point.m = buffer.readDoubleLE(buffer.position);
      results.push(buffer.position += 8);
    }
    return results;
  };

  parseFigures = function(buffer, count, properties) {
    var figures, i, j, ref;
    figures = [];
    if (count < 1) {
      return figures;
    }
    if (properties.P) {
      figures.push({
        attribute: 0x01,
        pointOffset: 0
      });
    } else if (properties.L) {
      figures.push({
        attribute: 0x01,
        pointOffset: 0
      });
    } else {
      for (i = j = 1, ref = count; 1 <= ref ? j <= ref : j >= ref; i = 1 <= ref ? ++j : --j) {
        figures.push({
          attribute: buffer.readUInt8(buffer.position),
          pointOffset: buffer.readInt32LE(buffer.position + 1)
        });
        buffer.position += 5;
      }
    }
    return figures;
  };

  parseShapes = function(buffer, count, properties) {
    var i, j, ref, shapes;
    shapes = [];
    if (count < 1) {
      return shapes;
    }
    if (properties.P) {
      shapes.push({
        parentOffset: -1,
        figureOffset: 0,
        type: 0x01
      });
    } else if (properties.L) {
      shapes.push({
        parentOffset: -1,
        figureOffset: 0,
        type: 0x02
      });
    } else {
      for (i = j = 1, ref = count; 1 <= ref ? j <= ref : j >= ref; i = 1 <= ref ? ++j : --j) {
        shapes.push({
          parentOffset: buffer.readInt32LE(buffer.position),
          figureOffset: buffer.readInt32LE(buffer.position + 4),
          type: buffer.readUInt8(buffer.position + 8)
        });
        buffer.position += 9;
      }
    }
    return shapes;
  };

  parseSegments = function(buffer, count) {
    var i, j, ref, segments;
    segments = [];
    if (count < 1) {
      return segments;
    }
    for (i = j = 1, ref = count; 1 <= ref ? j <= ref : j >= ref; i = 1 <= ref ? ++j : --j) {
      segments.push({
        type: buffer.readUInt8(buffer.position)
      });
      buffer.position++;
    }
    return segments;
  };

  exports.PARSERS = {
    geography: function(buffer) {
      return parseGeography(buffer);
    },
    geometry: function(buffer) {
      return parseGeography(buffer, true);
    }
  };

}).call(this);