FieldPacket.js
3.19 KB
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module.exports = FieldPacket;
function FieldPacket(options) {
options = options || {};
this.catalog = options.catalog;
this.db = options.db;
this.table = options.table;
this.orgTable = options.orgTable;
this.name = options.name;
this.orgName = options.orgName;
this.charsetNr = options.charsetNr;
this.length = options.length;
this.type = options.type;
this.flags = options.flags;
this.decimals = options.decimals;
this.default = options.default;
this.zeroFill = options.zeroFill;
this.protocol41 = options.protocol41;
}
FieldPacket.prototype.parse = function(parser) {
if (this.protocol41) {
this.catalog = parser.parseLengthCodedString();
this.db = parser.parseLengthCodedString();
this.table = parser.parseLengthCodedString();
this.orgTable = parser.parseLengthCodedString();
this.name = parser.parseLengthCodedString();
this.orgName = parser.parseLengthCodedString();
if (parser.parseLengthCodedNumber() !== 0x0c) {
var err = new TypeError('Received invalid field length');
err.code = 'PARSER_INVALID_FIELD_LENGTH';
throw err;
}
this.charsetNr = parser.parseUnsignedNumber(2);
this.length = parser.parseUnsignedNumber(4);
this.type = parser.parseUnsignedNumber(1);
this.flags = parser.parseUnsignedNumber(2);
this.decimals = parser.parseUnsignedNumber(1);
var filler = parser.parseBuffer(2);
if (filler[0] !== 0x0 || filler[1] !== 0x0) {
var err = new TypeError('Received invalid filler');
err.code = 'PARSER_INVALID_FILLER';
throw err;
}
// parsed flags
this.zeroFill = (this.flags & 0x0040 ? true : false);
if (parser.reachedPacketEnd()) {
return;
}
this.default = parser.parseLengthCodedString();
} else {
this.table = parser.parseLengthCodedString();
this.name = parser.parseLengthCodedString();
this.length = parser.parseUnsignedNumber(parser.parseUnsignedNumber(1));
this.type = parser.parseUnsignedNumber(parser.parseUnsignedNumber(1));
}
};
FieldPacket.prototype.write = function(writer) {
if (this.protocol41) {
writer.writeLengthCodedString(this.catalog);
writer.writeLengthCodedString(this.db);
writer.writeLengthCodedString(this.table);
writer.writeLengthCodedString(this.orgTable);
writer.writeLengthCodedString(this.name);
writer.writeLengthCodedString(this.orgName);
writer.writeLengthCodedNumber(0x0c);
writer.writeUnsignedNumber(2, this.charsetNr || 0);
writer.writeUnsignedNumber(4, this.length || 0);
writer.writeUnsignedNumber(1, this.type || 0);
writer.writeUnsignedNumber(2, this.flags || 0);
writer.writeUnsignedNumber(1, this.decimals || 0);
writer.writeFiller(2);
if (this.default !== undefined) {
writer.writeLengthCodedString(this.default);
}
} else {
writer.writeLengthCodedString(this.table);
writer.writeLengthCodedString(this.name);
writer.writeUnsignedNumber(1, 0x01);
writer.writeUnsignedNumber(1, this.length);
writer.writeUnsignedNumber(1, 0x01);
writer.writeUnsignedNumber(1, this.type);
}
};