tedious
Version:
A TDS driver, for connecting to MS SQLServer databases.
55 lines (53 loc) • 6.36 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _moneyn = _interopRequireDefault(require("./moneyn"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
const SHIFT_LEFT_32 = (1 << 16) * (1 << 16);
const SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32;
const TYPE_INFO = Buffer.from([_moneyn.default.id, 0x08]);
const Money = {
id: 0x3C,
type: 'MONEY',
name: 'Money',
declaration: function () {
return 'money';
},
writeTypeInfo(buffer) {
buffer.writeBuffer(TYPE_INFO);
},
writeValue(buffer, parameter) {
const value = parameter.value;
if (value == null) {
buffer.writeUInt8(0x00);
return;
}
// The value in ten-thousandths, as a high and a low 32-bit half.
const scaled = value * 10000;
buffer.writeUInt8(0x08);
buffer.writeInt32LE(Math.floor(scaled * SHIFT_RIGHT_32));
buffer.writeInt32LE(scaled & -1);
},
validate: function (value) {
if (value == null) {
return null;
}
value = parseFloat(value);
if (isNaN(value)) {
throw new TypeError('Invalid number.');
}
// money： -922337203685477.5808 to 922337203685477.5807
// in javascript -922337203685477.5808 === -922337203685477.6
// 922337203685477.5807 === 922337203685477.6
// javascript number doesn't have enough precision.
if (value < -922337203685477.6 || value > 922337203685477.6) {
throw new TypeError('Value must be between -922337203685477.5808 and 922337203685477.5807, inclusive.');
}
return value;
}
};
var _default = exports.default = Money;
module.exports = Money;
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