Commit

node_modules/bson/src/double.ts

@@ -0,0 +1,115 @@
+import { BSONValue } from './bson_value';
+import { BSONError } from './error';
+import type { EJSONOptions } from './extended_json';
+import { type InspectFn, defaultInspect } from './parser/utils';
+
+/** @public */
+export interface DoubleExtended {
+  $numberDouble: string;
+}
+
+/**
+ * A class representation of the BSON Double type.
+ * @public
+ * @category BSONType
+ */
+export class Double extends BSONValue {
+  get _bsontype(): 'Double' {
+    return 'Double';
+  }
+
+  value!: number;
+  /**
+   * Create a Double type
+   *
+   * @param value - the number we want to represent as a double.
+   */
+  constructor(value: number) {
+    super();
+    if ((value as unknown) instanceof Number) {
+      value = value.valueOf();
+    }
+
+    this.value = +value;
+  }
+
+  /**
+   * Attempt to create an double type from string.
+   *
+   * This method will throw a BSONError on any string input that is not representable as a IEEE-754 64-bit double.
+   * Notably, this method will also throw on the following string formats:
+   * - Strings in non-decimal and non-exponential formats (binary, hex, or octal digits)
+   * - Strings with characters other than numeric, floating point, or leading sign characters (Note: 'Infinity', '-Infinity', and 'NaN' input strings are still allowed)
+   * - Strings with leading and/or trailing whitespace
+   *
+   * Strings with leading zeros, however, are also allowed
+   *
+   * @param value - the string we want to represent as a double.
+   */
+  static fromString(value: string): Double {
+    const coercedValue = Number(value);
+
+    if (value === 'NaN') return new Double(NaN);
+    if (value === 'Infinity') return new Double(Infinity);
+    if (value === '-Infinity') return new Double(-Infinity);
+
+    if (!Number.isFinite(coercedValue)) {
+      throw new BSONError(`Input: ${value} is not representable as a Double`);
+    }
+    if (value.trim() !== value) {
+      throw new BSONError(`Input: '${value}' contains whitespace`);
+    }
+    if (value === '') {
+      throw new BSONError(`Input is an empty string`);
+    }
+    if (/[^-0-9.+eE]/.test(value)) {
+      throw new BSONError(`Input: '${value}' is not in decimal or exponential notation`);
+    }
+    return new Double(coercedValue);
+  }
+
+  /**
+   * Access the number value.
+   *
+   * @returns returns the wrapped double number.
+   */
+  valueOf(): number {
+    return this.value;
+  }
+
+  toJSON(): number {
+    return this.value;
+  }
+
+  toString(radix?: number): string {
+    return this.value.toString(radix);
+  }
+
+  /** @internal */
+  toExtendedJSON(options?: EJSONOptions): number | DoubleExtended {
+    if (options && (options.legacy || (options.relaxed && isFinite(this.value)))) {
+      return this.value;
+    }
+
+    if (Object.is(Math.sign(this.value), -0)) {
+      // NOTE: JavaScript has +0 and -0, apparently to model limit calculations. If a user
+      // explicitly provided `-0` then we need to ensure the sign makes it into the output
+      return { $numberDouble: '-0.0' };
+    }
+
+    return {
+      $numberDouble: Number.isInteger(this.value) ? this.value.toFixed(1) : this.value.toString()
+    };
+  }
+
+  /** @internal */
+  static fromExtendedJSON(doc: DoubleExtended, options?: EJSONOptions): number | Double {
+    const doubleValue = parseFloat(doc.$numberDouble);
+    return options && options.relaxed ? doubleValue : new Double(doubleValue);
+  }
+
+  inspect(depth?: number, options?: unknown, inspect?: InspectFn): string {
+    inspect ??= defaultInspect;
+    return `new Double(${inspect(this.value, options)})`;
+  }
+}